CN219513038U - Breaking device and surge protector - Google Patents

Abstract

The utility model relates to the field of surge protector equipment, in particular to a breaker and a surge protector. The breaker is used for the backup protection of a surge protector body and comprises a heating part, a first electrode, a second electrode, a moving part and a spring, wherein the first electrode and the second electrode are respectively and fixedly matched with the heating part, the moving part is connected with the heating part through the spring, the moving part is respectively connected with the first electrode and the second electrode through a fusing part, the first electrode and the second electrode are electrically connected through the moving part, and the spring can enable the moving part to be separated from at least one of the first electrode and the second electrode.

Description

Breaking device and surge protector

Technical Field

The utility model relates to the field of surge protector equipment, in particular to a breaker and a surge protector.

Background

The surge protector is used for protecting the connected line, and is applied to a power circuit or a communication line, and the principle of the surge protector is that the conduction and the distribution of the impact current are realized through an internal piezoresistor, so that the damage of the impact current to equipment on the power circuit or the communication line is avoided. When the surge protector is used daily, the lightning protection element in the surge protector can generate loss, so that leakage current passing through the surge protector is increased, after the leakage current caused by the loss reaches a certain degree, a thermal tripping mechanism in the surge protector acts to cut off the leakage current, and the surge protector body realizes backup protection of the surge protector body through series connection with a fuse. The existing fuse generally aims at the current above 180A, the thermal tripping mechanism generally aims at the current below 1A, a protection neutral gear exists between the current above 180A and the thermal tripping mechanism, when the leakage current is in the protection neutral gear, the fuse cannot react due to the rated current of the fuse, the thermal tripping mechanism is fused for a certain time, at the moment, the leakage current can cause the surge protector to burn in a very short time, and therefore the thermal tripping mechanism cannot react timely.

Because the existing fuse needs to have the capability of resisting surge current impact, the rated current of the fuse element needs to reach a higher degree, and the current cannot be matched with the current between protection neutral gears, so that the existing fuse cannot achieve the protection of smaller leakage current by reducing the rated current of the fuse element.

Disclosure of Invention

On one hand, the utility model provides the breaker, which can increase the response capability of the breaker to smaller leakage current on the premise of ensuring the impact current resistance of the breaker;

in another aspect, the present utility model provides a surge protector.

The breaker is used for the backup protection of a surge protector body and comprises a heating part, a first electrode, a second electrode, a moving part and a spring, wherein the first electrode and the second electrode are respectively and fixedly matched with the heating part, the moving part is connected with the heating part through the spring, the moving part is respectively connected with the first electrode and the second electrode through a fusing part, the first electrode and the second electrode are electrically connected through the moving part, and the spring can enable the moving part to be separated from at least one of the first electrode and the second electrode.

Further, the heating portion has opposite first and second ends; the direction from the first end to the second end is a first direction, the first electrode and the second electrode are sequentially arranged along the first direction, and the moving part can slide along the first direction.

Further, the heating portion is including the first wallboard, second wallboard and the third wallboard that link to each other in proper order enclosing the formation cell body, the removal portion is located in the cell body, and with the inner wall sliding fit of cell body, first electrode with first wallboard is close to first end department laminating, the second electrode with the second wallboard is close to second end department laminating, the removal portion includes fixed complex fixed block and electrically conductive piece, the one end of spring with the second wallboard is close to second end department and links to each other, the other end with the fixed block links to each other, electrically conductive piece has first laminating portion and second laminating portion, first laminating portion with first electrode passes through fuse portion links to each other, second laminating portion with the second electrode passes through fuse portion links to each other.

Further, the fixed block is attached to the second wall plate, and heat conduction can be achieved between the second wall plate and the electric conduction piece through the fixed block.

Further, the first electrode has a first contact surface facing the tank body, the second electrode has a second contact surface facing the tank body, the first contact surface and the second contact surface are respectively parallel to the first direction, the first attaching portion is connected with the first contact surface, and the second attaching portion is connected with the second contact surface.

Further, the first electrode has a first contact surface facing the second end of the heating portion, the second electrode has a second contact surface facing the second end of the heating portion, the first attaching portion is connected to the first contact surface, and the second attaching portion is connected to the second contact surface.

Further, the fixed block is provided with two opposite first side wall surfaces and two opposite second side wall surfaces, the first side wall surfaces correspond to the first contact surfaces, the second side wall surfaces correspond to the second contact surfaces, a channel structure is arranged in the fixed block and is provided with two openings respectively formed in the first side wall surfaces and the second side wall surfaces, the conducting piece is fixedly matched with the channel structure, and two ends of the conducting piece penetrate out of the channel structure through the openings respectively to form the first attaching part and the second attaching part.

Further, the fixed block is provided with a front side wall surface, the front side wall surface is located between the first side wall surface and the second side wall surface, the channel structure is located on the front side wall surface and is provided with a notch, and the conductive piece can be placed into the channel structure through the groove body.

Further, the first bonding part is welded with the first electrode at a low temperature, and the second bonding part is welded with the second electrode at a low temperature.

The surge protector provided by the utility model comprises a protection circuit connected with the surge protector body in series, wherein any breaker is connected with the protection circuit in series.

Advantageous effects

Compared with the traditional fuse which relies on the complete fusing of the fuse core to realize the disconnection of a circuit, the acting force of the spring exists between the first electrode and the second electrode in the scheme, and the acting force can enable the connection part between the first electrode and the second electrode to be disconnected more easily; the breaker in the scheme has the acting force provided by the spring, so that the current which is smaller than b is required to continuously generate heat for c time or the time which is smaller than c time, and the connecting force of the fusing part to the first electrode and the second electrode is smaller than the acting force of the spring, so that the first electrode and the second electrode are disconnected. The heat quantity of the scheme comes from the heat quantity generated by the heating element, the heating element is provided with an external power supply or is connected with the protection circuit, the heat quantity can be controlled by selecting the heating specification of the heating element, and then the disconnection condition of the fusing part between the first electrode and the second electrode is controlled, so that the contradiction between the heat quantity of the melting core, the rated current of the melting core fusing and the impact-resistant current caused by the self heating of the melting core in the traditional scheme is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present utility model 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. It is apparent that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is an overall schematic view of a breaker according to an embodiment of the present utility model.

Reference numerals: 1-a heating part; 2-a first electrode; 3-a second electrode; 4-fixing blocks; 5-conductive members; 6-spring.

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

Example 1

A breaker is used for the backup protection of a surge protector body and comprises a heating part 1, a first electrode 2, a second electrode 3, a moving part and a spring 6, wherein the first electrode 2 and the second electrode 3 are respectively and fixedly matched with the heating part 1, the moving part is connected with the heating part 1 through the spring 6, the moving part is respectively connected with the first electrode 2 and the second electrode 3 through a fusing part, the first electrode 2 and the second electrode 3 are electrically connected through the moving part, and the spring 6 can enable the moving part to be separated from at least one of the first electrode 2 and the second electrode 3.

The basic principle of the breaker is that the first electrode 2 and the second electrode 3 are connected in series on the protection circuit, and the heat is utilized to fuse between the first electrode 2 and the second electrode 3, so that the protection circuit is disconnected. Compared with the conventional scheme that the fusing energy of the fuse is from the current flowing through the fuse, namely, the current flows through the fuse so that the fuse is fused by generating heat, the fusing energy of the breaker in the scheme is from the heat generated by the electrifying of the heating part 1, the heat generated by the heating part 1 is conducted to the fusing part through the first electrode 2 and the second electrode 3, the heating part 1 continuously generates heat for a period of time so that the fusing part is fused, the first electrode 2 and the second electrode 3 are connected by virtue of the connection of the moving part, when the fusing part is fused, the first electrode 2 and the second electrode 3 are respectively connected with the heating part 1, the heating part 1 supports and fixes the first electrode 2 and the second electrode 3, the moving part loses the connection acting force of the fusing part, moves under the acting force of the spring 6 and is separated from at least one of the first electrode 2 and the second electrode 3, the electric connection between the first electrode 2 and the second electrode 3 is disconnected, and the protection circuit is disconnected.

Compared with the traditional fuse which relies on the complete fusing of the fuse core to realize the disconnection of the circuit, the moving part in the scheme is acted by the acting force of the spring 6, and the acting force can enable the connection part between the moving part and the first electrode 2 and the second electrode 3 to be disconnected more easily; the breaker in this solution, due to the acting force provided by the spring 6, needs a current smaller than b for generating heat for c time, or is smaller than c time, so that the connection force of the fusing part to the moving part is smaller than the acting force of the spring 6, and the moving part moves to be disconnected from at least one of the first electrode 2 and the second electrode 3. The heat of the scheme comes from the heat generated by the heating part 1, the heating part 1 is provided with an external power supply or is connected with a protection circuit, the heat can be controlled by selecting the heating specification of the heating part 1, the disconnection condition of the fusing part is further controlled, and the contradiction between the heating value of the melting core, the rated current of the fusing of the melting core and the impact-resistant current of the melting core caused by the heating mode of the melting core in the traditional scheme is avoided.

In an alternative embodiment, the heating portion 1 has opposite first and second ends; the direction from the first end to the second end is a first direction, the first electrode 2 and the second electrode 3 are sequentially arranged along the first direction, and the moving part can slide along the first direction.

Since the moving part is separated from the first electrode 2 or the second electrode 3 or simultaneously separated from the first electrode 2 and the second electrode 3, and the first electrode 2 is disposed at the heating part 1 near the first end and the second electrode 3 is disposed at the heating part 1 near the second end, as the moving part moves in the first direction under the action of the spring 6, the moving part is separated from at least one of the first electrode 2 and the second electrode 3 when slid to a certain position, thereby achieving disconnection of the electrical connection between the first electrode 2 and the second electrode 3.

The first electrode 2 and the second electrode 3 are fixedly arranged on the heating part 1 and are connected with the moving part under the action of the fusing part, at the moment, the spring 6 has acting force for enabling the moving part to generate sliding displacement, when the connecting force of the spring 6 is smaller than the acting force of the spring 6 along with the melting of the fusing part, the spring 6 pulls the moving part to enable the moving part to slide relative to the heating part 1, so that the first electrode 2 is rapidly separated from the moving part, and the electric connection between the first electrode 2 and the second electrode 3 is disconnected. Because the fuse is generally of a tubular structure, the axial dimension of the fuse is larger than the radial dimension, the moving part in the scheme slides along the first direction under the action of the spring 6, so that the moving part has a larger displacement stroke, a reliable breaking effect is achieved, and meanwhile, the size of the breaker perpendicular to the first direction can be reduced because the fuse does not have displacement perpendicular to the first direction.

In an alternative embodiment, the heating portion 1 includes a first wall plate, a second wall plate and a third wall plate which are sequentially connected and enclose to form a groove body, the moving portion is located in the groove body and is in sliding fit with the inner wall of the groove body, the first electrode 2 is attached to the first wall plate near the first end, the second electrode 3 is attached to the second wall plate near the second end, the moving portion includes a fixing block 4 and a conductive piece 5 which are fixedly matched, one end of the spring 6 is connected to the second wall plate near the second end, the other end of the spring is connected to the fixing block 4, the conductive piece 5 is provided with a first attaching portion and a second attaching portion, the first attaching portion is connected to the first electrode 2 through a fusing portion, and the second attaching portion is connected to the second electrode 3 through a fusing portion.

Preferably, the heating part 1 is a heating ceramic, the heating ceramic is provided with a first wall plate, a second wall plate and a third wall plate, the first wall plate, the second wall plate and the third wall plate form a door shape, a groove body is formed in the enclosing area, the moving part is positioned in the groove body, and sliding in the groove body can be realized through pulling of the spring 6. The first wall plate and the third wall plate are respectively positioned at two sides of the second wall plate, the first electrode 2 is arranged on the first wall plate, the second electrode 3 is arranged on the second wall plate, the moving part is positioned between the first electrode 2 and the second electrode 3 along the direction perpendicular to the first direction, the conducting piece 5 of the moving part is respectively connected with the first electrode 2 and the second electrode 3, so that the electric connection between the first electrode 2 and the second electrode 3 is realized, the circuit breaker is connected in series on a protection circuit, the specific first electrode 2 is connected with a protection circuit cable at the side, the second electrode 3 is connected with the protection circuit cable at the side, and the conduction of the protection circuit is realized through the sequential connection of the first electrode 2, the sliding part and the second electrode 3.

The communication between the moving part and the first electrode 2 and the second electrode 3 is realized through a conductive piece 5, the conductive piece 5 is embedded in the fixed block 4, a first attaching part of the conductive piece 5 is connected with the first electrode 2 through a fusing part, and a second attaching part is connected with the second electrode 3 through a fusing part. When the heating element generates heat, the heat of the heating element is conducted to the first electrode 2 and the second electrode 3, the first electrode 2 and the second electrode 3 are copper conductors, and then the heat is conducted to the fusing part at the first attaching part and the second attaching part, so that the fusing part is partially melted or completely melted, when the connection acting force of the fusing part is insufficient to offset the pulling force of the spring 6, the spring 6 pulls the fixing block 4, and the fixing block 4 and the conductive element 5 are driven to slide to the first attaching part of the conductive element 5 along the first direction so as to be separated from the first electrode 2, and the purpose of disconnecting the protection circuit is achieved.

In an alternative embodiment, the fixing block 4 is attached to the second wall plate, and the heat between the second wall plate and the electric conduction member 5 can be conducted through the fixing block 4.

The fixed block 4 is ceramic material or metal material, and fixed block 4 is located the cell body and contacts with the second wallboard, and when the pottery that generates heat produced heat, heat conduction was to fixed block 4, and then conducted to electrically conductive piece 5, and electrically conductive piece 5 is the copper sheet, and first laminating portion and second laminating portion are the terminal surface that is located electrically conductive piece 5 both ends department, and first laminating portion and second laminating portion on the electrically conductive piece 5 conduct heat to the fusing portion, cooperate first electrode 2 and second electrode 3 with heat conduction to the fusing portion of first laminating portion and second laminating portion department to accelerate the melting speed of fusing portion.

Preferably, the wall surface of the second wall plate corresponding to the groove body is provided with a sliding groove, and the corresponding structure on the fixed block 4 is matched with the sliding groove, so that the fixed block 4 is kept attached to the second wall plate when the fusing part is not melted, and the fixed block 4 has a sliding path along the first direction when the spring 6 pulls the fixed block 4 to slide.

In an alternative embodiment, the first electrode 2 has a first contact surface facing the tank body, the second electrode 3 has a second contact surface facing the tank body, the first contact surface and the second contact surface are parallel to the first direction, respectively, the first engaging portion is connected to the first contact surface, and the second engaging portion is connected to the second contact surface.

The first contact surface and the second contact surface are respectively positioned at two sides of the groove body, a gap exists between the first attaching part and the first contact surface, the gap is filled with the fusing part, namely the first attaching part is connected with the first contact surface through the fusing part, the gap exists between the second attaching part and the second contact surface, the gap is filled with the fusing part, namely the second attaching part is connected with the second contact surface through the fusing part, when the conductive piece 5 slides along with the fixed block 4, the fusing part between the first attaching part and the first contact surface of the conductive piece 5 is melted, the gap exists between the first attaching part and the first contact surface and relatively slides, the fusing part between the second attaching part and the second contact surface is melted, the gap exists between the second attaching part and the second contact surface and relatively slides, and the spring 6 acts to move through pulling the fixed block 4 so that the fusing part between the conductive piece 5 and the first electrode 2 and the second electrode 3 is separated, and the electrical connection between the first electrode 2 and the second electrode 3 is disconnected.

Or, the first attaching portion abuts against the first contact surface, a fusing portion for connection and fixation is arranged around the abutting portion of the first attaching portion and the first contact surface, the second attaching portion abuts against the second contact surface, a fusing portion for connection and fixation is arranged around the abutting portion of the second attaching portion and the second contact surface, when the conductive piece 5 slides along with the fixed block 4, the first attaching portion and the first contact surface continue to keep abutting against and slide relatively, the second attaching portion and the second contact surface continue to keep abutting against and slide relatively, the spring 6 acts to pull the fixed block 4 to move, so that the conductive piece 5 slides to a disengaging position, the first attaching portion slides to the tail end of the first contact surface and continues to slide to disengage from the first contact surface, and the second attaching portion still contacts with the second contact surface, so that the electrical connection between the first electrode 2 and the second electrode 3 is disconnected.

In an alternative embodiment, the fixing block 4 has two opposite first side wall surfaces and second side wall surfaces, the first side wall surface corresponds to the first contact surface, the second side wall surface corresponds to the second contact surface, a channel structure is arranged in the fixing block 4, the channel structure has two openings respectively formed on the first side wall surface and the second side wall surface, the conductive piece 5 is fixedly matched with the channel structure, and two ends of the conductive piece 5 penetrate out of the channel structure through the openings respectively to form a first attaching part and a second attaching part.

In an alternative embodiment, the fixing block 4 has a front side wall surface, which is located between the first side wall surface and the second side wall surface, and the channel structure is provided with a notch on the front side wall surface, and the conductive member 5 can be placed into the channel structure through the slot.

In an alternative embodiment, the first bonding portion is welded to the first electrode 2 at a low temperature, and the second bonding portion is welded to the second electrode 3 at a low temperature.

The first bonding part and the first electrode 2 are welded at low temperature to form a fusing part, and the second bonding part and the second electrode 3 are welded at low temperature to form a fusing part.

Example two

In an alternative embodiment, the first electrode 2 has a first contact surface facing the second end of the heating part 1, the second electrode 3 has a second contact surface facing the second end of the heating part 1, the first fitting part is connected to the first contact surface, and the second fitting part is connected to the second contact surface.

The first contact surface and the second contact surface are both towards the second end of the heating part 1, and are sequentially arranged at intervals along the first direction, when the fusing part is not fused, namely, the first electrode 2 and the second electrode 3 are simultaneously connected with the conductive piece 5 through the fusing part, and when the conductive piece 5 slides along with the fixed block 4, the first attaching part and the second attaching part are simultaneously separated from the first contact surface and the second contact surface, so that the electric connection between the first electrode 2 and the second electrode 3 is disconnected.

Or, the first attaching part is abutted against the first contact surface, a fusing part for connecting and fixing is arranged around the abutted position of the first attaching part and the first contact surface, the second attaching part is abutted against the second contact surface, a fusing part for connecting and fixing is arranged around the abutted position of the second attaching part and the second contact surface, and the first attaching part and the second attaching part are separated from the first contact surface and the second contact surface at the same time, so that the electric connection between the first electrode 2 and the second electrode 3 is disconnected. The spring 6 is used for pulling the fixed block 4 to move so that the conductive piece 5 slides to a separation position, at this time, the first fitting part and the second fitting part are separated from the first contact surface and the second contact surface simultaneously, that is, a gap is generated between the first fitting surface and the first contact surface, the fusing part cannot electrically connect the first fitting surface and the first contact surface, a gap is generated between the second fitting surface and the second contact surface, and the fusing part cannot electrically connect the second fitting surface and the second contact surface, so that the electrical connection between the first electrode 2 and the second electrode 3 is disconnected.

Example III

The surge protector provided by the utility model comprises a protection circuit connected with the surge protector body in series, wherein any breaker is connected with the protection circuit in series.

The surge protector further comprises a control circuit, the heating part 1 is arranged on the control circuit, a control component is further arranged on the control circuit, and the control circuit can take electricity from the grounding end of the protection circuit through the control component.

The breaker in this scheme establishes ties and sets up on the protection circuit, still establish ties the surge protector body on the protection circuit, specifically, the surge protector body is located the breaker and is close to one side of earthing terminal, control circuit links to each other with the earthing side of protection circuit, be equipped with control assembly on the control circuit, control assembly can control whether the circular telegram of control circuit according to the electric current electric parameter of protection circuit, when power frequency current flows the protection circuit, control assembly makes the control circuit switch on according to the condition of predetermineeing, its electric energy is got from power frequency current or the external power supply on the protection circuit, the heat that heating portion 1 produced is conducted to first electrode 2 and second electrode 3 after the control circuit switch on, and then conduct to the fusing portion, heating portion 1 is in a period of time continuous heat generation, make the fusing portion melt, because the fixed of moving portion current position relies on the connection realization of fusing portion, therefore when the fusing portion melts, first electrode 2 and second electrode 3 are fixed, and the moving portion moves under the effort of spring 6, make the electric connection between first electrode 2 and the second electrode 3 break.

In an alternative embodiment, the control assembly comprises a current transformer and an electromagnetic release, wherein the current transformer is sleeved on the protection circuit, the current transformer is connected with the control side of the electromagnetic release, and the action side of the electromagnetic release is connected in series on the control circuit.

When power frequency current appears on the protection circuit where the surge protector body is located, the current transformer inputs current on the control side of the electromagnetic release, so that the action side of the electromagnetic release executes the action of closing the control circuit, the heating part 1 generates heat after the control circuit is electrified, the heat is conducted to the first electrode 2 and the second electrode 3, and then is conducted to the fusing part corresponding to the first electrode 2 and the second electrode 3, and the heating part 1 continuously generates heat in a period of time, so that the fusing part is fused.

It should be noted that the above-mentioned embodiments illustrate rather than limit the utility model, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The utility model may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, last, and next, etc. do not denote any order. These words may be interpreted as names.

The above embodiments are only suitable for illustrating the present utility model, not for limiting the present utility model, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the present utility model, and thus all equivalent technical solutions are also within the scope of the present utility model, which is defined by the claims.

Claims (10)

1. The utility model provides a breaker for the backup protection of surge protector body, its characterized in that includes heating portion (1), first electrode (2), second electrode (3), mobile part and spring (6), first electrode (2) with second electrode (3) respectively with heating portion (1) fixed fit, mobile part with link to each other through spring (6) between heating portion (1), mobile part respectively with first electrode (2) with second electrode (3) pass through the fusing portion and link to each other, first electrode (2) with second electrode (3) pass through mobile part electricity is connected, spring (6) can make mobile part with at least one of first electrode (2) and second electrode (3) breaks away from.

2. A breaking according to claim 1, wherein the heating portion (1) has opposite first and second ends; the direction from the first end to the second end is a first direction, the first electrode (2) and the second electrode (3) are sequentially arranged along the first direction, and the moving part can slide along the first direction.

3. A breaking device according to claim 2, wherein the heating portion (1) comprises a first wall plate, a second wall plate and a third wall plate which are sequentially connected to form a groove body, the moving portion is located in the groove body and is in sliding fit with the inner wall of the groove body, the first electrode (2) is attached to the first wall plate near a first end, the second electrode (3) is attached to the second wall plate near a second end, the moving portion comprises a fixing block (4) and a conductive member (5) which are fixedly matched, one end of the spring (6) is connected to the second wall plate near the second end, the other end of the spring is connected to the fixing block (4), the conductive member (5) is provided with a first attaching portion and a second attaching portion, the first attaching portion is connected with the first electrode (2) through the fusing portion, and the second attaching portion is connected with the second electrode (3) through the fusing portion.

4. A breaking device according to claim 3, characterized in that the fixing block (4) is attached to the second wall plate, which second wall plate is thermally conductive to the electrically conductive member (5) via the fixing block (4).

5. A breaking device according to claim 3, characterized in that the first electrode (2) has a first contact surface facing the tank, the second electrode (3) has a second contact surface facing the tank, the first contact surface and the second contact surface being parallel to the first direction, respectively, the first bonding portion being connected to the first contact surface, and the second bonding portion being connected to the second contact surface.

6. A breaking device according to claim 3, characterized in that the first electrode (2) has a first contact surface facing the second end of the heating portion (1), the second electrode (3) has a second contact surface facing the second end of the heating portion (1), the first bonding portion being connected to the first contact surface, the second bonding portion being connected to the second contact surface.

7. A breaking device according to claim 5 or 6, wherein the fixed block (4) has two opposite first and second side walls, the first side wall corresponds to the first contact surface, the second side wall corresponds to the second contact surface, a channel structure is arranged in the fixed block (4), the channel structure has two openings respectively formed in the first and second side walls, the conductive member (5) is fixedly matched with the channel structure, and two ends of the conductive member (5) respectively pass through the openings and out of the channel structure to form the first and second bonding portions.

8. A breaking device according to claim 7, characterized in that the fixed block (4) has a front side wall surface, which is located between the first side wall surface and the second side wall surface, the channel structure being provided with a slot in the front side wall surface, the conductive element (5) being able to be placed in the channel structure through the slot.

9. A breaking device according to claim 3, characterized in that the first bonding portion is welded to the first electrode (2) at low temperature and the second bonding portion is welded to the second electrode (3) at low temperature.

10. A surge protector comprising a protection circuit in series with a surge protector body, characterized in that a breaker as claimed in any one of claims 1-9 is connected in series with the protection circuit.