A surge protector with backup protection

Abstract

The present invention provides a surge protector with backup protection, comprising: a shell having a first area and a second area, wherein an operating mechanism, a contact mechanism, a short-circuit protection mechanism and an overload protection mechanism are installed in the first area, an operating panel is arranged above the first area, and a handle and an indication window are arranged on the operating panel; a surge protection module, comprising a varistor arranged in the second area, and a fault indication component extending from the second area to the first area, wherein the varistor and the contact mechanism are arranged in series, and when a short circuit or overload fault occurs, the short-circuit protection mechanism and the overload protection mechanism can cut off the main circuit in the first time, thereby preventing the fire caused by the overload and short circuit of the surge protector, and the fault indication component has a first indication part and a second indication part arranged adjacent to the indication window, so that the user can judge whether the varistor is damaged through the indication window on the operating panel, thereby replacing it in time, which is safer.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage electrical appliances, and in particular to a surge protector with backup protection. Background Art

[0002] The existing backup protector (such as a circuit breaker) and surge protector are generally two independent products. During installation, the backup protector and the surge protector are installed side by side on the same metal rail of the distribution cabinet, which occupies a large space.

[0003] In order to solve the above problems, Chinese patent document CN106653501A discloses a multifunctional small circuit breaker, which includes a circuit breaker body and a handle, etc., wherein a cavity is set in the shell, and a surge module is set in the cavity. The above scheme integrates the surge module in the shell, which occupies a small space. When the lightning overvoltage exceeds the limit that the varistor of the surge module can withstand, the user needs to replace the varistor in time to continue to play a protective role. However, in the current design, since only the operation panel where the handle is located is exposed on the outside of the distribution cabinet, the user cannot judge whether the varistor is damaged, which can easily lead to safety accidents such as fire. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the small circuit breaker with surge protection cannot promptly remind the user whether the varistor is damaged, which may easily lead to safety accidents such as fire, thereby providing a highly safe surge protector with backup protection.

[0005] To this end, the present invention provides a surge protector with backup protection, including a shell and a surge protection module, the shell having a first area and a second area, an operating mechanism and a contact mechanism installed in the first area, the contact mechanism including a moving contact and a static contact, the operating mechanism being used to drive the moving contact to be in contact or disconnected with the static contact, an operating panel being provided above the first area, the operating panel being provided with a handle and an indication window; a surge protection module, including a varistor provided in the second area, and a fault indication component extending from the second area to the first area, the varistor being provided in series with the contact mechanism, the fault indication component having a first indication portion and a second indication portion provided adjacent to the indication window, wherein when the varistor is working normally, the first indication portion is provided corresponding to the indication window; when the varistor fails, the second indication portion is provided corresponding to the indication window.

[0006] The fault indication assembly includes an indicator and a linkage rod. The indicator is rotatably installed in the shell and is arranged adjacent to the indication window. The indicator is provided with the first indicating part and the second indicating part. The indicator has a first position corresponding to the normal operation of the varistor and a second position corresponding to the failure of the varistor. The linkage rod is slidably installed in the shell and is used to drive the indicator to switch from the first position to the second position when the varistor fails.

[0007] The varistor is provided with a first conductive member electrically connected thereto, and the end of the linkage rod adjacent to the varistor is provided with a second conductive member corresponding to the first conductive member, wherein when the varistor works normally, the second conductive member is fixedly connected to the first conductive member; when the varistor fails, the second conductive member is separated from the first conductive member.

[0008] It also includes an elastic member arranged between the linkage rod and the housing, wherein when the varistor works normally, the elastic member is in an energy storage state; when the varistor fails, the elastic member is in an energy release state.

[0009] The indicator has a rotating shaft portion and a limiting groove arranged on the rotating shaft portion, and a limiting block is arranged on the linkage rod, wherein when the varistor works normally, the limiting block cooperates with the limiting groove to abut against each other, and the indicator is positioned at the first position.

[0010] The operating mechanism includes a contact bracket and a trip button driven by the handle, the moving contact is arranged on the contact bracket, the trip button has an initial state corresponding to the closing of the circuit breaker, and a trip button corresponding to the opening of the circuit breaker, and the linkage rod is provided with a protrusion cooperating with the trip button, wherein, when the varistor fails, the protrusion follows the linkage rod to move, drives the trip button to trip and keeps the trip button in the trip state.

[0011] The second conductive member has a first conductive plate and a second conductive plate respectively disposed at two ends thereof, and the first conductive plate is connected to the second conductive member.

[0012] The second conductive member is in a Z-shape, and the linkage rod is formed with a Z-shaped slot adapted to be plugged with the Z-shaped first conductive member.

[0013] The first conductive plate is fixed to the second conductive member by welding with low-temperature tin.

[0014] The technical solution of the present invention has the following advantages:

[0015] 1. The surge protector with backup protection provided by the present invention has a shell having a first area and a second area, an operation panel is provided above the first area, and a handle and an indication window are provided on the operation panel, the surge protection module includes a varistor arranged in the second area, and a fault indication component extending from the second area to the first area, the fault indication component has a first indication part and a second indication part arranged adjacent to the indication window, wherein when the varistor works normally, the first indication part is arranged corresponding to the indication window; when the varistor fails, the second indication part is arranged corresponding to the indication window. In this way, the user can judge whether the varistor is damaged through the indicator window on the operation panel, so as to replace it in time, which is safer. In addition, the trip button has an initial state corresponding to the closing of the circuit breaker and a tripping state corresponding to the opening of the circuit breaker. The linkage rod is provided with a protrusion that cooperates with the trip button. When the varistor fails, the protrusion follows the movement of the linkage rod and drives the trip button to trip, thereby separating and disconnecting the moving contact from the static contact, and the circuit breaker is in the opening state. Since the trip button remains in the tripping state, the moving contact and the static contact cannot be brought into contact and connected by the handle, that is, the circuit breaker cannot be manually closed. For home users, in addition to judging that the surge protection module has a fault through the indicator window, it is also possible to judge that the surge protector has a fault and needs to be replaced through the operation of the handle. Therefore, it is more convenient for home users to judge and use it.

[0016] 2. The surge protector with backup protection provided by the present invention has an indicator having a rotating shaft portion and a limit groove arranged on the rotating shaft portion, and a limit block is provided on the linkage rod, wherein when the varistor works normally, the limit block cooperates with the limit groove to offset each other, and the indicator is positioned at the first position, and the limit block and the limit groove that cooperate with each other have the advantage of simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic structural diagram of a surge protector with backup protection of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0020] Figure 3 It is a schematic diagram of the explosion structure of the surge protection module;

[0021] Figure 4It is a schematic diagram of the explosion structure of the linkage rod and the second conductive member;

[0022] Figure 5 This is a schematic diagram of the structure of a surge protector when the varistor fails.

[0023] Explanation of the reference numerals: 1. first area; 2. second area; 3. housing; 4. operating mechanism; 5. contact mechanism; 6. moving contact; 7. stationary contact; 8. operating panel; 9. handle; 10. indication window; 11. surge protection module; 12. varistor; 13. fault indication assembly; 14. first indication part; 15. second indication part; 16. indication member; 19. linkage rod; 20. elastic member; 21. first conductive member; 22. second conductive member; 23. shaft portion; 24. limiting groove; 25. limiting block; 26. contact bracket; 27. jump button; 28. bump; 30. slot; 31. first conductive plate; 32. second conductive plate; 33. short-circuit protection mechanism; 34. overload protection mechanism. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Example

[0029] This embodiment provides a surge protector with backup protection, such as Figure 1 As shown, it includes a housing 3 and a surge protection module 11 .

[0030] Shell 3, such as Figure 1 As shown, there is a first region 1 and a second region 2, such as Figure 5 As shown, the first area 1 is equipped with an operating mechanism 4, a contact mechanism 5, a short circuit protection mechanism 33 and an overload protection mechanism 34. An operating panel 8 is provided above the first area 1. The operating panel 8 is provided with a handle 9 and an indication window 10. The contact mechanism 5 includes a moving contact 6 and a stationary contact 7. The operating mechanism 4 is used to drive the moving contact 6 to contact or disconnect with the stationary contact 7. Figure 2 As shown, the operating mechanism 4 includes a contact bracket 26 and a trip button 27 driven by the handle 9, the moving contact 6 is provided on the contact bracket 26, and the trip button 27 has an initial state corresponding to the closing of the circuit breaker and a trip state corresponding to the opening of the circuit breaker. It should be noted that the operating mechanism 4, the short-circuit protection mechanism 33 and the overload protection mechanism 34 are existing mature technologies, so their specific structures and working principles are not described in detail. In addition, the existing operating mechanisms will include contact brackets and trip buttons, and the structures of other components will be different. For those skilled in the art, operating mechanisms with different structures can be selected. It should be noted that the varistor 12 may be damaged due to line short circuit, overload, leakage and other reasons. By setting a contact mechanism 5 in series with the varistor 12, when faults such as short circuit and overload occur, the short-circuit protection mechanism 33 and the overload protection mechanism 34 can drive the tripping button 27 of the operating mechanism 4 to trip, so that the contact mechanism is opened, thereby better protecting the varistor of the surge protector and preventing fires caused by overload and short circuit of the surge protector.

[0031] Surge protection module 11, such as Figure 1 and Figure 3 As shown, it includes a varistor 12 , a fault indication component 13 and an elastic member 20 .

[0032] The varistor 12 is disposed in the second region 2 and has a first conductive member 21 electrically connected thereto.

[0033] The fault indication assembly 13 extends from the second area 2 to the first area 1 , and includes an indication member 16 , a linkage rod 19 and a second conductive member 22 .

[0034] The indicator 16 is rotatably installed in the shell 3 and is arranged adjacent to the indicator window 10. The indicator 16 is provided with a first indicating portion 14 and a second indicating portion 15 arranged corresponding to the indicator window 10. The indicator 16 has a first position corresponding to the normal operation of the varistor 12 and a second position corresponding to the failure of the varistor 12.

[0035] The linkage rod 19 is slidably mounted in the housing 3 and is used to drive the indicator 16 to switch from the first position to the second position when the varistor 12 fails. Figure 3 As shown, the indicator 16 has a shaft portion 23 and a limit groove 24 provided on the shaft portion 23, and the linkage rod 19 is provided with a limit block 25, wherein when the varistor 12 works normally, the limit block 25 cooperates with the limit groove 24 to abut against each other, and the indicator 16 is positioned at the first position. The linkage rod 19 is provided with a convex block 28 that cooperates with the trip button 27, wherein when the varistor 12 fails, the convex block 28 moves with the linkage rod 19, and drives the trip button 27 to trip and keep the trip button 27 in a tripped state.

[0036] The second conductive member 22 is disposed at one end of the linkage rod 19 adjacent to the varistor 12 and is disposed corresponding to the first conductive member 21. Figure 4 As shown, the first conductive member 21 has a first conductive plate 31 and a second conductive plate 32 respectively arranged at both ends thereof, the first conductive plate 31 is connected to the second conductive member 22, the second conductive plate 32 is connected to the bimetallic strip of the overload protection mechanism 34 through a wire, and since the bimetallic strip is connected to the moving contact 6 through a soft twisted wire, the series connection between the varistor 12 and the varistor is realized. In this embodiment, the second conductive member 22 is Z-shaped, and the linkage rod 19 is formed with a Z-shaped slot 30 adapted to be plugged into the Z-shaped first conductive member 21, and the first conductive plate 31 is welded and fixed to the second conductive member 22 by low-temperature tin. Wherein, when the varistor 12 is working normally, the second conductive member 22 is fixedly connected to the first conductive member 21; when the varistor 12 fails, the second conductive member 22 is separated from the first conductive member 21.

[0037] The elastic member 20 is disposed between the linkage rod 19 and the housing 3 , wherein when the varistor 12 works normally, the elastic member 20 is in an energy storage state; when the varistor 12 fails, the elastic member 20 is in an energy release state.

[0038] The working principle of the circuit breaker of the present invention is as follows:

[0039] When the varistor 12 is in normal operation (such as Figure 1As shown in the figure, the second conductive member 22 is welded and fixed to the first conductive member 21, the elastic member 20 is in the energy storage state, the limit block 25 of the linkage rod 19 abuts against the limit groove 24 of the indicator member 16, so that the indicator member 16 is positioned and maintained at the first position, and the first indicating portion 14 of the indicator member 16 is arranged correspondingly to the indicating window 10;

[0040] When the varistor 12 fails due to lightning overvoltage (such as Figure 5 As shown in the figure, the low-temperature tin between the second conductive member 22 and the first conductive member 21 will melt due to the high temperature, and the elastic member 20 will release energy to drive the linkage rod 19 to move upward. The top of the linkage rod 19 drives the indicator 16 to rotate counterclockwise to the second position. The second indicating portion 15 of the indicator 16 is arranged corresponding to the indicating window 10. When the linkage rod 19 moves upward, it will drive the protrusion 28 to move, and the protrusion 28 drives the trip button 27 to trip, thereby opening the circuit breaker.

[0041] The surge protector with backup protection provided by the present invention has a housing 3 having a first area 1 and a second area 2, an operation panel 8 is provided above the first area 1, a handle 9 and an indication window 10 are provided on the operation panel 8, a surge protection module 11 includes a varistor 12 provided in the second area 2, and a fault indication component 13 extending from the second area 2 to the first area 1, the fault indication component 13 has a first indication part 14 and a second indication part 15 provided adjacent to the indication window 10, wherein when the varistor 12 is working normally, the first indication part 14 is provided corresponding to the indication window 10; when the varistor 12 fails, the second indication part 15 is provided corresponding to the indication window 10. In this way, the user can intuitively judge whether the varistor is damaged through the indication window 10 on the operation panel 8, so as to replace it in time, which is safer.

[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A surge protector with backup protection, characterized in that: include: A housing (3) comprising a first area (1) and a second area (2), wherein an operating mechanism (4) and a contact mechanism (5) are installed in the first area (1), wherein the contact mechanism (5) comprises a moving contact (6) and a stationary contact (7), wherein the operating mechanism (4) is used to drive the moving contact (6) to be in contact with or to be separated from the stationary contact (7), and comprises a contact support (26) and a tripping button (27) driven by a handle (9), wherein the moving contact (6) is arranged on the contact support (26), and the tripping button (27) has an initial state corresponding to the closing of the circuit breaker and a tripping state corresponding to the opening of the circuit breaker, and an operating panel (8) is arranged above the first area (1), and the operating panel (8) is provided with a handle (9) and an indication window (10); A surge protection module (11) comprises a varistor (12) arranged in the second area (2), and a fault indication assembly (13) extending from the second area (2) to the first area (1), wherein the varistor (12) is arranged in series with the contact mechanism (5), and the fault indication assembly (13) comprises: an indication member (16) rotatably mounted in the housing (3), the indication member (16) being provided with a first indication portion (14) and a second indication portion (15) arranged adjacent to the indication window (10), the indication member (16) having a first position corresponding to the normal operation of the varistor (12), and a second position corresponding to the occurrence of a fault in the varistor (12); and a linkage A rod (19) is slidably mounted in the housing (3) and is used to drive the indicator (16) to switch from the first position to the second position when the varistor (12) fails, and the linkage rod (19) is provided with a protrusion (28) that cooperates with the trip button (27), wherein when the varistor (12) works normally, the first indicator portion (14) and the indicator window (10) are arranged correspondingly; when the varistor (12) fails, the protrusion (28) follows the movement of the linkage rod (19), drives the trip button (27) to trip and keeps the trip button (27) in a tripped state, and the second indicator portion (15) and the indicator window (10) are arranged correspondingly.

2. The surge protector with backup protection according to claim 1, characterized in that: The varistor (12) is provided with a first conductive member (21) electrically connected thereto, and one end of the linkage rod (19) adjacent to the varistor (12) is provided with a second conductive member (22) arranged corresponding to the first conductive member (21), wherein when the varistor (12) is working normally, the second conductive member (22) is fixedly connected to the first conductive member (21); when the varistor (12) fails, the second conductive member (22) is separated from the first conductive member (21).

3. The surge protector with backup protection according to claim 1, characterized in that: It also includes an elastic member (20) disposed between the linkage rod (19) and the housing (3), wherein when the varistor (12) is working normally, the elastic member (20) is in an energy storage state; when the varistor (12) fails, the elastic member (20) is in an energy release state.

4. The surge protector with backup protection according to claim 1, characterized in that: The indicating member (16) comprises a rotating shaft portion (23) and a limiting groove (24) provided on the rotating shaft portion (23); the linkage rod (19) is provided with a limiting block (25); when the varistor (12) works normally, the limiting block (25) cooperates with the limiting groove (24) to abut against each other, and the indicating member (16) is positioned at the first position.

5. The surge protector with backup protection according to claim 2, characterized in that: The second conductive member (22) has a first conductive plate (31) and a second conductive plate (32) respectively arranged at two ends thereof, and the first conductive plate (31) is connected to the second conductive member (22).

6. The surge protector with backup protection according to claim 2, characterized in that: The second conductive member (22) is in a Z-shape, and the linkage rod (19) is formed with a Z-shaped slot (30) adapted to be plugged into the Z-shaped first conductive member (21).

7. The surge protector with backup protection according to claim 5, characterized in that: The second conductive plate (32) is fixed to the second conductive member (22) by welding with low-temperature tin.

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