Surge protection device

Abstract

The utility model belongs to the technical field of electrical equipment protection, and particularly relates to a surge protection device, which comprises a shell, a fuse, a piezoresistor, a discharge tube, an input connecting piece, an output connecting piece and a state indicating mechanism, and is characterized in that the fuse, the piezoresistor, the discharge tube and the state indicating mechanism are mounted in the shell; one end of the input connecting piece is exposed out of the shell, the other end of the input connecting piece is electrically connected with one end of the piezoresistor, one end of the output connecting piece is exposed out of the shell, the other end of the output connecting piece is electrically connected with one end of the fuse, and the discharge tube is electrically connected between the other end of the piezoresistor and the other end of the fuse. And the state indicating mechanism is used for indicating a first state when the fuse is not fused and indicating a second state when the fuse is fused. Whether the fuse is in the fusing state or not can be indicated through switching between the first state and the second state, so that an indication can be given out in time, and an operator can judge conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical equipment protection, in particular to a surge protector. Background Art

[0002] Surge protector is an important device that protects electrical equipment from instantaneous surge shocks.

[0003] An existing surge protector includes a housing, a fuse, a varistor, a discharge tube, an input connector, and an output connector. The housing is provided with a mounting cavity, and the fuse, varistor, and discharge tube are mounted in the mounting cavity. One end of the input connector is exposed from the housing and is used to connect to an electrical device, and the other end extends into the mounting cavity and is electrically connected to the varistor. One end of the output connector is exposed from the housing and is used to connect to the electrical device, and the other end extends into the mounting cavity and is electrically connected to the fuse. The varistor is electrically connected to the discharge tube, and the discharge tube is electrically connected to the fuse, thereby electrically connecting the two electrical devices. When the surge protector is struck by lightning or a transient high current, the fuse blows, thereby disconnecting the two electrical devices and breaking the circuit.

[0004] However, existing surge protectors do not provide any indication or alarm when the fuse blows, preventing timely detection and delaying equipment maintenance. They may even mislead users into believing that the surge protector is functioning properly. Later analysis of the user's equipment may reveal that the surge protector has already failed, resulting in greater losses and more serious consequences. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a surge protector for the problem that the existing surge protector has no indication or alarm when the fuse is blown.

[0006] To solve the above technical problems, the present invention provides a surge protector, comprising a housing, a fuse, a varistor, a discharge tube, an input connector, an output connector, and a status indicator mechanism. The fuse, varistor, discharge tube, and status indicator mechanism are mounted within the housing. One end of the input connector is exposed from the housing, and the other end is electrically connected to one end of the varistor. One end of the output connector is exposed from the housing, and the other end is electrically connected to one end of the fuse. The discharge tube is electrically connected between the other end of the varistor and the other end of the fuse.

[0007] The state indicating mechanism is used to indicate a first state when the fuse is not blown and to indicate a second state when the fuse is blown.

[0008] Optionally, the device further comprises a mounting bracket mounted in the housing, the status indication mechanism comprises an indication plate and a driving member, the housing is provided with an indication window, the mounting bracket has a red indication surface on a side facing the indication window, the indication plate is mounted between the mounting bracket and the housing, the indication plate has a green indication surface on a side facing the indication window, the indication plate has a blocking position and a avoiding position, in which the indication plate closes the indication window so that the green indication surface is exposed from the indication window to form the first state, and in the avoiding position, the indication plate opens the indication window so that the red indication surface is exposed from the indication window to form the second state;

[0009] The driving member is used to drive the indicating plate to move between the blocking position and the avoiding position.

[0010] Optionally, the indicator plate includes a first driving part, a connecting part and an indicating part, the connecting part is connected between the indicating part and the first driving part, the connecting part is rotatably assembled with the mounting frame, the indicating part is provided with the green indicating surface on the side facing the indicating window, the first driving part has a first angle and a second angle, at the first angle, the indicating plate is located in the blocking position, and at the second angle, the indicating plate is located in the avoidance position, and the driving member is used to drive the first driving part to swing between the first angle and the second angle.

[0011] Optionally, the fuse is located between the indicator plate and the housing, the driving member includes a connected driving hook and a driving plate, the driving plate is slidably connected to the mounting frame, and a side of the driving hook facing the driving part abuts against the first driving part;

[0012] The fuse includes a body and an elastic ejector pin. The body is connected to the mounting bracket. The elastic ejector pin is installed in the body. The elastic ejector pin has a pop-up end exposed from the body. The pop-up end abuts against the drive plate. The elastic ejector pin can pop out of the body when the fuse blows. The pop-up end is used to drive the drive plate to move in a direction away from the body.

[0013] Optionally, a first chamber is provided on the mounting frame, the main body is installed in the first chamber, the driving member further includes a transition plate, the transition plate is arranged between the indicator plate and the mounting frame, the transition plate is vertically connected to the driving plate, and the driving hook is connected to an end of the transition plate away from the driving plate.

[0014] Optionally, the mounting frame is further provided with a sliding chamber connected to the first chamber, the sliding chamber has an opening facing the side of the indicator plate, a sliding groove is provided on the inner wall of the sliding chamber, the driving plate is provided with a sliding rail on the side facing the sliding groove, the driving plate is slidingly plugged into the sliding chamber, the sliding rail is slidingly connected to the sliding groove, and the end of the driving plate close to the transition plate passes through the opening.

[0015] Optionally, the varistor is connected to the mounting bracket, and the status indicating mechanism further comprises an elastic pole piece, the elastic pole piece having a first end and a second end connected to each other, the first end being arranged between the first driving unit and the varistor, the first end being bent toward the varistor and soldered to the varistor via low-temperature soldering, and the second end being electrically connected to the discharge tube;

[0016] The low-temperature solder can melt when the varistor or the discharge tube is overheated, so that the first end drives the first driving part to swing between the first angle and the second angle by relying on elastic force.

[0017] Optionally, an alarm component is further included, and the alarm component is used to issue a remote alarm prompt when the fuse is blown.

[0018] Optionally, the alarm component includes a micro switch and a signal terminal, the micro switch is connected to the mounting bracket, the signal terminal is exposed from the shell, the micro switch is electrically connected to the signal terminal, the micro switch is used to open when the fuse blows, and the signal terminal is used to transmit an alarm signal to a remote operator.

[0019] Optionally, the alarm component includes a micro switch and a signal terminal, the micro switch is connected to the mounting bracket, the signal terminal is exposed from the shell, the micro switch is electrically connected to the signal terminal, the micro switch is used to open when the fuse blows, and the signal terminal is used to transmit an alarm signal to a remote operator.

[0020] According to the surge protector of the embodiment of the present invention, the discharge tube is connected between the varistor and the fuse, and can be connected to one of the electrical devices in the external circuit through the input connector, and can be connected to another electrical device in the external circuit through the output connector, thereby electrically connecting to form a current path between the two electrical devices. Compared with the prior art, the status indicator mechanism can indicate whether the fuse is in the blown state by switching between the first state and the second state, thereby being able to issue an indication in a timely manner, facilitating the operator's judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a surge protector provided in one embodiment of the present utility model;

[0022] Figure 2 for Figure 1 Schematic diagram of the decomposition;

[0023] Figure 3 A schematic structural diagram of a surge protector provided in one embodiment of the present invention (without the housing);

[0024] Figure 4 for Figure 3 Schematic diagram of the decomposition;

[0025] Figure 5 for Figure 3 Structural diagram of the middle mounting frame;

[0026] Figure 6 for Figure 5 Another perspective of

[0027] Figure 7 It is a schematic diagram of the cooperation between the second end of the elastic pole piece, the indicator plate and the micro switch when it bounces up;

[0028] Figure 8 This is a schematic diagram of the coordination between the drive component, indicator plate and micro switch when the fuse blows.

[0029] The accompanying drawings in the specification are numeraled as follows: 1. housing; 2. indicator window; 3. upper housing; 4. lower housing; 5. indicator plate; 6. indicator portion; 7. green indicator surface; 8. connecting portion; 9. first driving portion; 10. pressing portion; 11. rotating shaft; 12. spring; 13. driving member; 14. driving plate; 15. contact portion; 16. transition plate; 17. driving hook; 18. micro switch; 19. signal line; 20. socket strip; 21. signal terminal; 22. mounting bracket; 23. alarm panel; 24. red indicator surface; 25. fuse; 26. output terminal; 27. output connector; 28. first clamp; 29. ​​second clamp; 30. mounting plate; 31. Electrical connection plate; 32. Second perforation; 33. Elastic pole piece; 34. First end; 35. Welding hole; 36. Second end; 37. Discharge tube; 38. Sealing plate; 39. Varistor; 40. First connecting piece; 41. Second connecting piece; 42. Input connector; 43. Input end; 44. Carrying plate; 45. First chamber; 46. Sliding chamber; 47. First support plate; 48. Slide rail; 49. Opening; 50. First perforation; 51. Rotation hole; 52. Second chamber; 53. Arc-shaped slot; 54. Third chamber; 55. Second support plate; 56. Slide slot; 57. Main body; 58. Elastic ejector pin; 59. Pop-up end. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] like Figures 1 to 8 As shown, an embodiment of the present invention provides a surge protector, including a housing 1, a fuse 25, a varistor 39, a discharge tube 37, an input connector 42, an output connector 27 and a status indicator mechanism, wherein the fuse 25, the varistor 39, the discharge tube 37 and the status indicator mechanism are installed in the housing 1, one end of the input connector 42 is exposed to the housing 1, and the other end is electrically connected to one end of the varistor 39, one end of the output connector 27 is exposed to the housing 1, and the other end is electrically connected to one end of the fuse 25, and the discharge tube 37 is electrically connected between the other end of the varistor 39 and the other end of the fuse 25.

[0032] The state indicating mechanism is used to indicate a first state when the fuse 25 is not blown and to indicate a second state when the fuse 25 is blown.

[0033] At least one fuse 25 is provided. In this embodiment, specifically, only one fuse 25 is provided. The discharge tube 37 is connected between the varistor 39 and the fuse 25. The discharge tube 37 can be connected to one of the electrical devices in the external circuit through the input connector 42, and can be connected to another electrical device in the external circuit through the output connector 27, thereby electrically connecting to form a current path between the two electrical devices. The status indicator mechanism can indicate whether the fuse 25 is in the blown state by switching between the first state and the second state, thereby being able to issue an indication in a timely manner, which is convenient for the operator to judge. In addition, the use of the fuse 25 as the overcurrent protection unit is also convenient for replacement and installation.

[0034] In one embodiment, the surge protector further includes a mounting bracket 22 installed in the housing 1, the status indication mechanism includes an indication plate 5 and a driving member 13, an indication window 2 is provided on the housing 1, and the mounting bracket 22 has a red indication surface 24 on the side facing the indication window 2, the indication plate 5 is installed between the mounting bracket 22 and the housing 1, and the indication plate 5 has a green indication surface 7 on the side facing the indication window 2, the indication plate 5 has a blocking position and an avoidance position, in the blocking position, the indication plate 5 closes the indication window 2 so that the green indication surface 7 is exposed from the indication window 2 to form the first state, and in the avoidance position, the indication plate 5 opens the indication window 2 so that the red indication surface 24 is exposed from the indication window 2 to form the second state.

[0035] The driving member 13 is used to drive the indicating plate 5 to move between the blocking position and the avoiding position.

[0036] The switching between the first state and the second state of the status indicator mechanism can be a switching of the presence or absence of an alarm sound, a change of color, or a switching of a pattern. In this embodiment, the switching between the first state and the second state of the status indicator mechanism is used to determine whether the fuse 25 is blown by the change of color.

[0037] Specifically, the housing 1 comprises an upper shell 3 and a lower shell 4 connected vertically, forming an integral structure. A mounting frame 22 is mounted within the mounting space formed by the upper and lower shells 3 and 4. An alarm panel 23 is mounted on the mounting frame 22. A gap is formed between the side of the alarm panel 23 facing the mounting frame 22 and the mounting frame 22. The side of the alarm panel 23 facing away from the mounting frame 22 faces the indicator window 2 provided on the upper shell 3. A red indicator surface 24 is provided on the side of the alarm panel 23 facing the indicator window 2. When the indicator panel 5 is in the blocked position, the indicator panel 5 is obscured between the alarm panel 23 and the indicator window 2, allowing the operator to see a green light in the indicator window 2, indicating that the fuse 25 is in a first state of normal operation. When the fuse 25 is blown, the driving member 13 drives the indicator panel 5 to move away from the alarm panel 23 and the indicator window 2, thereby revealing the red indicator surface 24. The operator can see a red light in the indicator window 2, indicating that the fuse 25 is in a second state of blown. The switching between red and green colors allows the operator to intuitively observe the status of the fuse 25.

[0038] In one embodiment, the indicator plate 5 includes a first driving portion 9, a connecting portion 8, and an indicating portion 6. The connecting portion 8 is connected between the indicating portion 6 and the first driving portion 9. The connecting portion 8 is rotatably assembled with the mounting bracket 22. The indicating portion 6 is provided with a green indicating surface 7 on the side facing the indicating window 2. The first driving portion 9 has a first angle and a second angle. At the first angle, the indicating plate 5 is located in the blocking position, and at the second angle, the indicating plate 5 is located in the avoiding position. The driving member 13 is used to drive the first driving portion 9 to swing between the first and second angles. The connecting portion 8 of the indicating plate 5 is also connected to the upper shell 3 via a spring 12. The spring 12 applies a force to swing the indicating plate 5 toward the first angle, so that when the fuse 25 is in the operating state, the indicating portion 6 can be stably located between the alarm plate 23 and the indicating window 2, preventing the indicating plate 5 from shaking on its own.

[0039] Specifically, the indicator plate 5 is an irregular structure. The connecting portion 8 of the indicator plate 5 is connected between the indicating portion 6 and the first driving portion 9. The mounting frame 22 has two open rotating holes 51 arranged opposite to each other. The connecting portion 8 is provided with rotating shafts 11 on opposite sides. The rotating shafts 11 on both sides are respectively inserted into the two rotating holes 51, which is equivalent to placing the indicator plate 5 on the mounting frame 22 through the rotating shafts 11 on both sides. The rotating shafts 11 can rotate in the rotating holes 51. The indicating portion 6 is arranged above the connecting portion 8. The indicating portion 6 is flat. The side of the indicator plate 5 facing the indicating window 2 is provided with a green indicating surface 7. There is a certain gap between the side of the part 6 facing the connecting part 8 and the connecting part 8, and the alarm plate 23 is located in the gap. The first driving part 9 is arranged below the connecting part 8, and the driving member 13 is arranged below the indicator plate 5. The driving member 13 can swing the first driving part 9 between the first angle and the second angle. The gap between the connecting part 8 and the mounting frame 22 provides a swinging space for the first driving part 9. When the first driving part 9 is at the first angle, the indicator part 6 is located between the alarm plate 23 and the indicator window 2. When the first driving part 9 is at the second angle, the indicator part 6 moves away from between the alarm plate 23 and the knowledge window. The first driving part 9 is driven by the driving member 13 to swing at the first angle and the second angle to realize the switching between the blocking position and the avoidance position of the indicator plate 5, which can save space and make the surge protector more compact.

[0040] In one embodiment, the fuse 25 is located between the indicator plate 5 and the housing 1, and the driving member 13 includes a connected driving hook 17 and a driving plate 14, the driving plate 14 is slidably connected to the mounting frame 22, and the driving hook 17 is against the first driving part 9 on the side facing the driving part.

[0041] The fuse 25 includes a body 57 and an elastic ejector pin 58. The body 57 is connected to the mounting bracket 22. The elastic ejector pin 58 is installed in the body 57. The elastic ejector pin 58 has a pop-up end 59 that exposes the body 57. The pop-up end 59 abuts against the drive plate 14. The elastic ejector pin 58 can pop out of the body 57 when the fuse 25 is blown. The pop-up end 59 is used to drive the drive plate 14 to move away from the body 57.

[0042] Specifically, the drive plate 14 extends in the vertical direction, the lower end of the drive hook 17 is connected to the drive plate 14, and the upper end of the drive hook 17, facing the first drive unit 9, has an inclined surface that specifically cooperates with the first drive unit 9. The drive plate 14 is arranged on one side of the body 57 of the fuse 25. The side of the drive plate 14 facing the body 57 is provided with a contact portion 15, which abuts against the pop-up end 59 of the elastic ejector 58. When the fuse 25 blows, the pop-up end 59 pops up and pushes the drive plate 14 away from the body 57, so that the drive plate 14 drives the drive hook 17 to push the first drive unit 9 of the indicator plate 5. Since the connecting portion 8 of the indicator plate 5 is rotatably connected to the mounting bracket 22, the drive hook 17 drives the first drive unit 9 to swing. No additional drive mechanism is provided, and the indicator plate 5 is driven to swing by the elastic ejector 58 of the fuse 25 itself through the drive member 13, which simplifies the structure and saves costs.

[0043] In one embodiment, a first chamber 45 is provided on the mounting frame 22, and the main body 57 is installed in the first chamber 45. The driving member 13 also includes a transition plate 16, which is arranged between the indicator plate 5 and the mounting frame 22. The transition plate 16 is vertically connected to the driving plate 14, and the driving hook 17 is connected to the end of the transition plate 16 away from the driving plate 14.

[0044] Specifically, the transition plate 16 is arranged horizontally, the drive plate 14 is arranged vertically, the transition plate 16 is vertically connected to the drive plate 14, one end of the transition plate 16 is connected to the drive plate 14, and the drive hook 17 is connected to the other end of the transition plate 16, the drive hook 17 is located above one end of the transition plate 16, and the drive plate 14 is located below the other end of the transition plate 16. The body 57 of the fuse 25 is installed in the first chamber 45, the transition plate 16 is arranged beside the first chamber 45, and the transition plate 16 is arranged parallel to the top of the body 57. The drive plate 14 and the drive hook 17 are connected by the transition plate 16, which can reduce the space of the mounting frame 22 and make the mounting frame 22 more compact.

[0045] In one embodiment, the mounting frame 22 is further provided with a sliding chamber 46 connected to the first chamber 45, and the sliding chamber 46 has an opening 49 facing the side of the indicator plate 5. A sliding groove 56 is provided on the inner wall of the sliding chamber 46, and a sliding rail 48 is provided on the side of the driving plate 14 facing the sliding groove 56. The driving plate 14 is slidably plugged into the sliding chamber 46, and the sliding rail 48 is slidably connected to the sliding groove 56. The end of the driving plate 14 close to the transition plate 16 passes through the opening 49.

[0046] Specifically, the sliding chamber 46 is located beside the first chamber 45, and the sliding chamber 46 is communicated with the first chamber 45. The upper side of the sliding chamber 46 has an opening 49, and the upper end of the driving plate 14 is connected to the transition plate 16 through the opening 49. A slide groove 56 is provided on the inner cavity wall on one side of the sliding chamber 46, and a first support plate 47 is provided on the inner cavity wall on the other side. A slide rail 48 is provided on one side of the driving plate 14, and a second support cover plate is provided on the other side. The slide rail 48 is slidably inserted in the slide groove 56, and the second support plate 55 is overlapped on the first support plate 47, which can not only support the driving plate 14, but also guide the driving plate 14 to prevent the driving plate 14 from tilting.

[0047] In one embodiment, the varistor 39 is connected to the mounting bracket 22, and the status indicating mechanism further includes an elastic electrode piece 33, wherein the elastic electrode piece 33 has a first end 34 and a second end 36 connected to each other, wherein the first end 34 is arranged between the first driving unit 9 and the varistor 39, the first end 34 is bent toward the varistor 39 and is soldered to the varistor 39 by low-temperature soldering, and the second end 36 is electrically connected to the discharge tube 37.

[0048] The low-temperature solder can melt when the varistor 39 or the discharge tube 37 is overheated, so that the first end 34 drives the first driving part 9 to swing between the first angle and the second angle by elastic force.

[0049] Specifically, the elastic pole piece 33 includes a bent portion located between the first end 34 and the second end 36, and the first end 34 is located obliquely above the second end 36. The mounting frame 22 is provided with a second chamber 52 for accommodating the discharge tube 37 and the second end 36, and a third chamber 54 for installing the varistor 39. The first chamber 45, the second chamber 52 and the third chamber 54 are separated from each other. The upper part of the third chamber 54 is closed and the lower part is open. The varistor 39 is installed in the third chamber 54 from bottom to top. A first connecting piece 40 is provided above the varistor 39 and a second connecting piece 41 is provided below. The varistor 39 sits on the supporting plate 44 of the input connector 42. The second connecting piece 41 of the varistor 39 is connected to the supporting plate 44 of the input connector 42. The input end 43 of the input connector 42 can be exposed from the housing 1 for connection to the electrical equipment.

[0050] The first connecting piece 40 of the varistor 39 is arranged vertically, and a first through-hole 50 is provided on the upper side wall of the third chamber 54. The first connecting piece 40 passes through the first through-hole 50 from bottom to top. The first end 34 of the elastic pole piece 33 is arranged above the first through-hole 50, and a welding hole 35 is provided on the first end 34. The first end 34 is pressed on the mounting frame 22, so that the first connecting piece 40 is stuck in the welding hole 35, and the first connecting piece 40 and the first end 34 are welded together by low-temperature soldering.

[0051] The second end 36 of the elastic pole piece 33 extends into the second chamber 52. A second through-hole 32 is provided between the second chamber 52 and the first chamber 45. The fuse 25 is installed in the first chamber 45 through the mounting plate 30 of the output connector 27. The two ends of the body 57 of the fuse 25 are respectively inserted into the first clamp 28 and the second clamp 29 on both sides of the mounting plate 30 (the first clamp 28 and the second clamp 29 are connected to the mounting plate 30 by rivets), and are electrically connected to the output connector 27 through the first clamp 28 and the second clamp 29. The output end 26 of the output connection is exposed to the housing 1 to be electrically connected to the electrical equipment. An electrical connection plate 31 is provided on the mounting plate 30 of the output connector 27. The electrical connection plate 31 is arranged perpendicular to the mounting plate 30. The mounting plate 30 passes through the second through-hole 32. The discharge tube 37 extends into the second chamber 52. In the second chamber 52, the discharge tube 37 is clamped in the arc-shaped clamping groove 53 on the inner wall of the second chamber 52. The discharge tube 37 is located between the second end 36 of the elastic electrode 33 and the electrical connection plate 31. The sealing plate 38 of the second chamber 52 makes the electrical connection plate 31 tightly contact one side of the discharge tube 37, and the other side of the discharge tube 37 tightly contact the second end 36, thereby electrically connecting the elastic electrode 33, the discharge tube 37 and the fuse 25. The current enters the varistor 39 from the input end 43 of the input connector 42, and flows through the varistor 39, the elastic electrode 33, the discharge tube 37 and the electrical connection plate 31 in sequence to the fuse 25, and then flows from the fuse 25 to the output end 26 of the output connector 27, thus completing the current path.

[0052] When the surge protector is subjected to a large current and the temperature of the discharge tube 37 or the varistor 39 is too high, the low-temperature solder between the elastic electrode 33 and the varistor 39 will melt, and the first end 34 will bounce off the first connecting piece 40, driving one driving part thereof to swing.

[0053] In one embodiment, an alarm component is further included, which is used to issue a remote alarm prompt when the fuse 25 is blown. The alarm component includes a micro switch 18 and a signal terminal 21. The micro switch 18 is connected to the mounting bracket 22, and the signal terminal 21 is exposed to the housing 1. The micro switch 18 is electrically connected to the signal terminal 21. The micro switch 18 is used to open when the fuse 25 is blown, and the signal terminal 21 is used to transmit an alarm signal to a remote operator.

[0054] Specifically, the micro switch 18 is installed on the mounting bracket 22, the micro switch 18 is located next to the alarm board 23, the signal terminal 21 is exposed on the shell 1, and the signal terminal 21 is plugged into the socket 20 electrically connected to the micro switch 18 to achieve electrical connection between the micro switch 18 and the signal terminal 21. The micro switch 18 opens when the fuse 25 blows, and the signal terminal 21 is used to transmit an alarm signal to the remote operator.

[0055] In one embodiment, the indicator plate 5 further includes a pressing portion 10 connected to the connecting portion 8 , and the pressing portion 10 can move toward the micro switch 18 when the first driving portion 9 swings from the first angle to the second angle.

[0056] Specifically, the pressing part 10 is located above the connecting part 8. When the first driving part 9 swings from the first angle to the second angle, the pressing part 10 is driven to approach the micro switch 18, so that the pressing part 10 presses the micro switch 18. The pressing part 10 is part of the indicator plate 5 and can press the micro switch 18 while the indicator part 6 moves to the avoidance position. There is no need to design another driving mechanism to drive the micro switch 18, and local indication and remote alarm can be achieved simultaneously.

[0057] The surge protector of the embodiment of the utility model, the working principle of the fault separation of the elastic pole piece 33 and the state conversion process of the state indication mechanism is as follows:

[0058] Fault separation of the elastic pole piece 33:

[0059] The elastic electrode 33 is made of a thin elastic copper plate. One side of the elastic electrode 33 is tightly fitted with the discharge tube 37, and the other side is connected to the varistor 39 using low-temperature solder. When any component of the varistor 39 or the discharge tube 37 degrades and generates heat due to various overloads, and the temperature reaches the expected melting temperature of the low-temperature solder, the high elasticity of the elastic electrode 33 causes the first end 34 of the elastic electrode 33 to detach from the first connecting piece 40 of the varistor 39, thereby achieving fault disconnection.

[0060] Status indicator mechanism state transition:

[0061] First, the detached elastic pole piece 33 drives the indicator plate 5 to swing, causing the green indicator surface 7 of the indicator portion 6 to move away from the alarm plate 23 and the indicator window 2, allowing the operator to observe the red indicator surface 24 on the alarm plate 23 through the indicator window 2, thereby converting the normal working green to the fault red. Simultaneously, the indicator plate 5 swings, and the pressing portion 10 triggers the microswitch 18, turning it on. After the microswitch 18 switches state, the fault status signal is output to the customer's remote monitoring system via the signal line 19 and the signal terminal 21, thereby achieving the purpose of receiving failure instructions both locally and remotely.

[0062] Second, when the fuse 25 fails due to internal melting, the ejection end 59 of the elastic ejector 58 ejects the body 57 and pushes the drive plate 14 to move, causing the drive hook 17 to swing the indicator plate 5. This allows the green indicator surface 7 of the indicator portion 6 to move away from the alarm plate 23 and the indicator window 2, allowing the operator to observe the red indicator surface 24 on the alarm plate 23 through the indicator window 2. This transitions the normal green indicator light to the fault red indicator light. Simultaneously, the indicator plate 5 swings, triggering the microswitch 18. This switching of the microswitch 18 state outputs a fault status signal to the customer's remote monitoring system via the signal line 19 and the signal terminal 21, thereby enabling the simultaneous local and remote reception of failure indications.

[0063] According to the surge protector of the embodiment of the present utility model, the discharge tube 37 is connected between the varistor 39 and the fuse 25, and can be connected to one of the electrical devices in the external circuit through the input connector 42, and can be connected to another electrical device in the external circuit through the output connector 27, thereby electrically connecting to form a current path between the two electrical devices. Compared with the prior art, the status indicator mechanism can indicate whether the fuse 25 is in the blown state by switching between the first state and the second state, so that the indication can be issued in a timely manner, which is convenient for the operator to judge.

[0064] In other embodiments, a plurality of fuses 25 are provided, and the plurality of fuses 25 are arranged in parallel, and both ends of each fuse 25 are respectively connected to the output connector 27 and the discharge tube 37 .

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A surge protector, characterized in that: The invention comprises a housing (1), a fuse (25), a varistor (39), a discharge tube (37), an input connector (42), an output connector (27) and a status indicator mechanism, wherein the fuse (25), the varistor (39), the discharge tube (37) and the status indicator mechanism are installed in the housing (1), one end of the input connector (42) is exposed outside the housing (1), and the other end is electrically connected to one end of the varistor (39), one end of the output connector (27) is exposed outside the housing (1), and the other end is electrically connected to one end of the fuse (25), and the discharge tube (37) is electrically connected between the other end of the varistor (39) and the other end of the fuse (25); The state indicating mechanism is used to indicate a first state when the fuse (25) is not blown and to indicate a second state when the fuse (25) is blown.

2. The surge protector according to claim 1, characterized in that: The device further comprises a mounting frame (22) mounted in the housing (1), the state indicating mechanism comprising an indicating plate (5) and a driving member (13), an indicating window (2) being provided on the housing (1), a red indicating surface (24) being provided on a side of the mounting frame (22) facing the indicating window (2), the indicating plate (5) being mounted between the mounting frame (22) and the housing (1), a green indicating surface (7) being provided on a side of the indicating plate (5) facing the indicating window (2), the indicating plate (5) having a blocking position and a avoiding position, wherein in the blocking position, the indicating plate (5) closes the indicating window (2) so that the green indicating surface (7) is exposed from the indicating window (2) to form the first state, and in the avoiding position, the indicating plate (5) opens the indicating window (2) so that the red indicating surface (24) is exposed from the indicating window (2) to form the second state; The driving member (13) is used to drive the indicating plate (5) to move between the blocking position and the avoiding position.

3. The surge protector according to claim 2, characterized in that: The indicator plate (5) comprises a first driving portion (9), a connecting portion (8) and an indicating portion (6), wherein the connecting portion (8) is connected between the indicating portion (6) and the first driving portion (9), and the connecting portion (8) is rotatably assembled with the mounting frame (22). The indicating portion (6) is provided with the green indicating surface (7) on a side facing the indicating window (2). The first driving portion (9) has a first angle and a second angle. At the first angle, the indicating plate (5) is located at the blocking position, and at the second angle, the indicating plate (5) is located at the avoiding position. The driving member (13) is used to drive the first driving portion (9) to swing between the first angle and the second angle.

4. The surge protector according to claim 3, characterized in that: The fuse (25) is located between the indicator plate (5) and the housing (1), the driving member (13) includes a connected driving hook (17) and a driving plate (14), the driving plate (14) is slidably connected to the mounting frame (22), and the driving hook (17) is abutted against the first driving part (9) on a side facing the driving part; The fuse (25) includes a body (57) and an elastic ejector pin (58), wherein the body (57) is connected to the mounting frame (22), and the elastic ejector pin (58) is mounted in the body (57). The elastic ejector pin (58) has a pop-up end (59) exposed from the body (57), and the pop-up end (59) abuts against the drive plate (14). The elastic ejector pin (58) can pop out of the body (57) when the fuse (25) is blown, and the pop-up end (59) is used to drive the drive plate (14) to move in a direction away from the body (57).

5. The surge protector according to claim 4, characterized in that: The mounting frame (22) is provided with a first chamber (45), the body (57) is installed in the first chamber (45), the driving member (13) further includes a transition plate (16), the transition plate (16) is arranged between the indicator plate (5) and the mounting frame (22), the transition plate (16) is vertically connected to the driving plate (14), and the driving hook (17) is connected to an end of the transition plate (16) away from the driving plate (14).

6. The surge protector according to claim 5, characterized in that: The mounting frame (22) is further provided with a sliding chamber (46) communicating with the first chamber (45), the sliding chamber (46) having an opening (49) facing the side of the indicator plate (5), the inner wall of the sliding chamber (46) is provided with a slide groove (56), the driving plate (14) is provided with a slide rail (48) facing the side of the slide groove (56), the driving plate (14) is slidably plugged into the sliding chamber (46), the slide rail (48) is slidably connected to the slide groove (56), and the end of the driving plate (14) close to the transition plate (16) passes through the opening (49).

7. The surge protector according to claim 6, characterized in that: The varistor (39) is connected to the mounting frame (22), and the state indicating mechanism further comprises an elastic pole piece (33), the elastic pole piece (33) having a first end (34) and a second end (36) connected to each other, the first end (34) being arranged between the first driving portion (9) and the varistor (39), the first end (34) being bent toward the varistor (39) and being welded to the varistor (39) by low-temperature soldering, and the second end (36) being electrically connected to the discharge tube (37); The low-temperature solder can melt when the varistor (39) or the discharge tube (37) is overheated, so that the first end (34) drives the first driving part (9) to swing between the first angle and the second angle by relying on elastic force.

8. The surge protector according to claim 7, characterized in that: It also includes an alarm component, which is used to issue a remote alarm prompt when the fuse (25) is blown.

9. The surge protector according to claim 8, characterized in that: The alarm assembly includes a micro switch (18) and a signal terminal (21), wherein the micro switch (18) is connected to the mounting bracket (22), the signal terminal (21) is exposed outside the housing (1), the micro switch (18) is electrically connected to the signal terminal (21), the micro switch (18) is used to open when the fuse (25) is blown, and the signal terminal (21) is used to transmit an alarm signal to a remote operator.

10. The surge protector according to claim 9, characterized in that: The indicator plate (5) further includes a pressing portion (10) connected to the connecting portion (8), and the pressing portion (10) is capable of moving in a direction close to the micro switch (18) when the first driving portion (9) swings from a first angle to a second angle.

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