CN215528605U

CN215528605U - Safe type high-reliability surge protector

Info

Publication number: CN215528605U
Application number: CN202121835854.3U
Authority: CN
Inventors: 李红斌; 郑雷鸣
Original assignee: Zhejiang Leitai Electrical Co ltd
Current assignee: Zhejiang Leitai Electrical Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-14
Anticipated expiration: 2031-08-05

Abstract

The utility model relates to a safe high-reliability surge protector which comprises a shell, wherein a first wiring terminal and a second wiring terminal are arranged on the shell, a pressure-sensitive fixing seat is arranged in the shell, a pressure-sensitive resistor is fixedly arranged on the pressure-sensitive fixing seat and comprises a first electrode end and a second electrode end, the first electrode end is connected with the first wiring terminal, an elastic metal copper sheet is connected with the second wiring terminal, a contact piece is bent at the front end of the second electrode end, the elastic metal copper sheet comprises a fixed end, a free end and an inclined connecting section, the fixed end is connected with the second wiring terminal, the free end is connected with the fixed end through the inclined connecting section, the free end corresponds to the position of the contact piece, and the free end is clamped on the contact piece through an easily-fusing clamping piece. The voltage dependent resistor can be timely separated from a circuit when heating, is safe and reliable, and is convenient to maintain.

Description

Safe type high-reliability surge protector

Technical Field

The utility model relates to the technical field of lightning protection, in particular to a safe high-reliability surge protector.

Background

A surge protector is a device used to limit transient over-voltages and conduct surge currents. The lightning protection device not only has a lightning protection function, but also has the function of inhibiting switching overvoltage. A surge protector is a commonly used low-voltage protection device, which is in a high-impedance state under normal conditions, and once a line is subjected to a surge due to a lightning strike or other reasons, it is turned on within a very short time to introduce a lightning current or overvoltage to the ground through a ground wire, thereby protecting equipment on the line. However, when the surge protector is deteriorated due to various reasons, such as the surge protector using the varistor, the varistor may generate heat rapidly, thereby causing accidents such as combustion and explosion of the surge protector.

SUMMERY OF THE UTILITY MODEL

The utility model provides a safe high-reliability surge protector, a piezoresistor of which can be timely separated from a circuit when heating, is convenient to maintain, and solves the problems existing in the prior art in the use process.

The technical scheme of the utility model is realized as follows: a safe high-reliability surge protector comprises a shell, wherein a first wiring terminal and a second wiring terminal are respectively arranged on the left side and the right side of the shell, a pressure-sensitive fixing seat is arranged in the shell and is positioned at the bottom of the shell, a pressure-sensitive resistor is fixedly arranged on the pressure-sensitive fixing seat and comprises a first electrode end and a second electrode end, the first electrode end is connected with the first wiring terminal, an elastic metal copper sheet is connected with the second wiring terminal, the front end of the second electrode end is bent in an L shape and is provided with a contact piece, the elastic metal copper sheet comprises a fixed end, a free end and an inclined connecting section, the fixed end is connected with the second wiring terminal, the free end is connected with the fixed end through the inclined connecting section, the free end corresponds to the position of the contact piece, and the contact piece and the free end are provided with an easy-fusing part, the fusible clamping piece is used for clamping the free end on the abutting sheet.

Preferably, the fusible clamping part comprises a first clamping plate and a second clamping plate, the first clamping plate is connected with the head end of the second clamping plate in a U shape, the first clamping plate and the second clamping plate are inwards tightened from the head end, and the tail ends of the first clamping plate and the second clamping plate are outwards expanded.

Preferably, the contact piece and the free end are both provided with limiting holes, and the first clamping plate and the second clamping plate are both connected with clamping blocks clamped into the limiting holes.

Preferably, the middle position of the inclined connecting section is connected with a driving plate, the driving plate is parallel to the right side of the pressure-sensitive fixed seat, and a spring is arranged between the driving plate and the pressure-sensitive fixed seat.

Preferably, the upper end of the free end extends out of the contact piece, the pressure-sensitive fixing seat is provided with an expanded graphite strip, and the expanded graphite strip corresponds to the upper end of the free end.

Preferably, the pressure-sensitive fixing seat is fixedly provided with an installation clamping seat, the expanded graphite strip is arranged in the installation clamping seat in a matching manner, and one side of the expanded graphite strip, which faces the free end, penetrates out of the installation clamping seat.

Preferably, the fixed end is fixedly connected to the second connecting terminal through a screw.

In conclusion, the beneficial effects of the utility model are as follows:

1. the free end of the elastic metal copper sheet is clamped on the contact piece of the second electrode end of the piezoresistor by the fusible clamping piece, the fixed end of the elastic metal copper sheet is connected with the second wiring terminal, and when the piezoresistor rapidly heats and reaches a certain temperature, the fusible clamping piece is melted, so that the free end of the copper sheet is separated from the contact piece, the phenomena of spontaneous combustion and explosion of the surge protector are effectively prevented, the safety and the reliability are realized, and compared with the traditional mode of adopting low-temperature soldering tin for connection, the fusible clamping piece is more convenient for non-professional persons to replace and maintain.

2. The clamping piece easy to fuse is inwards tightened from the head end through the first clamping plate and the second clamping plate, the free end can be effectively clamped on the contact sheet, the tail ends of the first clamping plate and the second clamping plate are outwards expanded, and the free end and the contact sheet can be conveniently pressed between the first clamping plate and the second clamping plate. In addition, the clamping blocks on the first clamping plate and the second clamping plate are clamped into the limiting holes on the contact piece and the free end, so that the locking effect is achieved, and the reliability of the structure is enhanced.

3. The spring can be in the fuse holder melts timely messenger's free end in back and keeps away from to the contact, and the inflation graphite strip can be quick after being heated expands in addition, pushes up the free end from supporting the contact to the inflation graphite strip is the cooperation and installs on the installation cassette, conveniently changes.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic perspective view of the contact piece, the elastic metal copper sheet and the fusible clamping piece according to the present invention.

In the figure: 1. a housing; 11. a pressure-sensitive fixing seat; 21. a first connection terminal; 22. a second connection terminal; 3. a voltage dependent resistor; 31. a first electrode terminal; 32. a second electrode terminal; 321. a contact piece is abutted; 4. a resilient metallic copper sheet; 41. a fixed end; 42. a free end; 43. an inclined connecting section; 44. driving the plate; 45. A limiting hole; 5. the clamping piece is easy to fuse; 51. a first splint; 52. a second splint; 53. a clamping block; 6. a spring; 7. expanded graphite strips; 8. installing a card seat; 9. a screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1-2 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1 and fig. 2, the utility model discloses a safety high-reliability surge protector, which includes a housing 1, wherein a first connection terminal 21 and a second connection terminal 22 are respectively disposed on the left side and the right side of the housing 1, a pressure-sensitive fixing seat 11 is disposed in the housing 1, the pressure-sensitive fixing seat 11 is located at the bottom position of the housing 1, a pressure-sensitive resistor 3 is fixedly disposed on the pressure-sensitive fixing seat 11, the pressure-sensitive resistor 3 includes a first electrode end 31 and a second electrode end 32, the first electrode end 31 is connected with the first connection terminal 21, the second connection terminal 22 is connected with an elastic metal copper sheet 4, the front end of the second electrode end 32 is bent in an L shape to form an interference piece 321, the elastic metal copper sheet 4 includes a fixed end 41, a free end 42 and an inclined connection section 43, the fixed end 41 is connected to the second connection terminal 22, the free end 42 is connected to the fixed end 41 through the inclined connection section 43, the free end 42 corresponds to the position of the abutting sheet 321, the abutting sheet 321 and the free end 42 are provided with fusible clamping members 5, and the fusible clamping members 5 are used for clamping the free end 42 on the abutting sheet 321.

The utility model adopts the fusible clamping piece 5 to clamp the free end 42 of the elastic metal copper sheet 4 on the contact piece 321 of the second electrode end 32 of the piezoresistor 3, and the fixed end 41 of the elastic metal copper sheet 4 is connected with the second wiring terminal 22, when the piezoresistor 3 rapidly heats and reaches a certain temperature, the fusible clamping piece 5 is melted, so that the free end 42 of the copper sheet is separated from the contact piece 321, thereby effectively preventing the spontaneous combustion and explosion of the surge protector, being safe and reliable, and compared with the traditional connection by adopting low-temperature soldering tin, the fusible clamping piece 5 is more convenient for non-professional persons to replace and maintain.

Wherein, easily fusing holder 5 is including first splint 51 and second splint 52, first splint 51 is connected with second splint 52's head end is the U font, first splint 51 and second splint 52 begin inwards to tighten up from the head, and this structure can effectually press from both sides free end 42 and conflict piece 321 tightly, the terminal of first splint 51 and second splint 52 outwards expands and opens, can conveniently impress free end 42 and conflict piece 321 between first splint 51 and the second splint 52.

In order to enable the fusible clamping member 5 to more firmly and reliably clamp the abutting piece 321 and the free end 42, the abutting piece 321 and the free end 42 are both provided with a limiting hole 45, and the first clamping plate 51 and the second clamping plate 52 are both connected with a clamping block 53 clamped in the limiting hole 45.

In the present invention, the middle of the inclined connecting section 43 is connected with a driving plate 44, the driving plate 44 is parallel to the right side of the pressure-sensitive fixing seat 11, a spring 6 is arranged between the driving plate 44 and the pressure-sensitive fixing seat 11, and the spring 6 can make the free end 42 away from the contact piece 321 in time after the fusible clamping member 5 is melted.

In the utility model, the upper end of the free end 42 extends out of the contact piece 321, the pressure-sensitive fixing seat 11 is provided with an expanded graphite strip 7, and the expanded graphite strip 7 corresponds to the upper end of the free end 42. The pressure-sensitive fixing base 11 is fixed with the installation cassette 8, the cooperation of expanded graphite strip 7 sets up in installation cassette 8, installation cassette 8 is worn out to one side towards free end 42 on the expanded graphite strip 7, and expanded graphite strip 7 can be quick after being heated expands, pushes up free end 42 from supporting contact piece 321 to expanded graphite strip 7 is the cooperation and installs on installation cassette 8, conveniently changes.

In the utility model, the fixed end 41 is fixedly connected to the second wiring terminal 22 through the screw 9, so that the elastic metal copper sheet 4 can be conveniently detached and replaced.

Meanwhile, the utility model also points out terms such as: the terms "front," "back," "vertical," "horizontal," and the like, as used herein, are intended to refer to an orientation or positional relationship as shown in the drawings for convenience in describing the utility model and in order to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the scope of the utility model.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a high reliable surge protector of safe type, includes the casing, be equipped with first binding post and second binding post on the left and right sides of casing respectively, be equipped with pressure-sensitive fixing base in the casing, pressure-sensitive fixing base is located the bottom position of casing, the last fixed piezo-resistor that is provided with of pressure-sensitive fixing base, its characterized in that: the piezoresistor comprises a first electrode end and a second electrode end, wherein the first electrode end is connected with a first wiring terminal, an elastic metal copper sheet is connected onto the second wiring terminal, the front end of the second electrode end is bent in an L shape and provided with a contact piece, the elastic metal copper sheet comprises a fixed end, a free end and an inclined connecting section, the fixed end is connected onto the second wiring terminal, the free end is connected onto the fixed end through the inclined connecting section, the position of the free end corresponds to that of the contact piece, an easily fused clamping piece is arranged on the contact piece and the free end, and the easily fused clamping piece is used for clamping the free end onto the contact piece.

2. The safety type high-reliability surge protector according to claim 1, wherein: the easily-fusing clamping piece comprises a first clamping plate and a second clamping plate, the first clamping plate is connected with the head end of the second clamping plate in a U shape, the first clamping plate and the second clamping plate are inwards tightened from the head end, and the tail ends of the first clamping plate and the second clamping plate are outwards expanded.

3. The safety type high-reliability surge protector according to claim 2, wherein: spacing holes are formed in the contact piece and the free end, and clamping blocks clamped into the spacing holes are connected to the first clamping plate and the second clamping plate.

4. The safety type high-reliability surge protector according to claim 2, wherein: the middle position of the inclined connecting section is connected with a driving plate, the driving plate is parallel to the right side of the pressure-sensitive fixed seat, and a spring is arranged between the driving plate and the pressure-sensitive fixed seat.

5. The safety type high-reliability surge protector according to claim 2, wherein: the upper end of the free end extends out of the contact piece, the pressure-sensitive fixing seat is provided with an expanded graphite strip, and the expanded graphite strip corresponds to the upper end of the free end.

6. The safety type high-reliability surge protector according to claim 5, wherein: the pressure-sensitive fixing seat is fixedly provided with an installation clamping seat, the expanded graphite strip is arranged in the installation clamping seat in a matching mode, and one side, facing the free end, of the expanded graphite strip penetrates out of the installation clamping seat.

7. The safety type high-reliability surge protector according to claim 1, wherein: the fixed end is fixedly connected to the second wiring terminal through a screw.