CN115188645A - Fuse and electronic device - Google Patents

Abstract

The invention provides a fuse and electronic equipment, wherein the fuse comprises a shell with an installation cavity, a fusing piece and an insulating piece, the insulating piece is installed in the installation cavity, the insulating piece comprises a first flexible separating part and a second flexible separating part which are oppositely arranged, the first flexible separating part and the second flexible separating part are oppositely attached, the fusing piece is installed between the first flexible separating part and the second flexible separating part, and two ends of the fusing piece extend out of the shell; before the melting piece is melted, the first flexible separating part and the second flexible separating part are abutted against two side surfaces of the melting piece; after the melting piece is melted, the first flexible separating part and the second flexible separating part are attached relatively to isolate the melted piece after being melted. Through the first flexible partition part and the second flexible partition part that set up relative laminating for the fuse-element is after the melting, and first flexible partition part and second flexible partition part are returned to initial condition under flexible material's the effect of resumeing, thereby isolated fuse-element after the melting.

Description

Fuse and electronic device

Technical Field

The application relates to the technical field of electricity, in particular to a fuse and electronic equipment.

Background

The fuse is a current protector that is designed to break a circuit by melting a fuse element by heat generated by the fuse element when a current exceeding a predetermined value flows therethrough, thereby protecting the circuit. The protective circuit is widely applied to high-low voltage distribution systems and control systems, is used as a short-circuit and overcurrent protector, and is one of common protective electric appliances.

In recent years, new energy vehicles are continuously developed, fuses are more and more applied to the new energy vehicles, and after the existing medium-high voltage fuses are fused, the contacts are communicated continuously in an arc connection mode due to the fact that the contacts are close to each other, so that a circuit is damaged.

Disclosure of Invention

Based on the technical scheme, the invention provides the fuse and the electrical equipment, and aims to solve the problems that an arc is generated in the melting process of a melting piece and a shell is melted.

The invention provides a fuse, which comprises a shell with an installation cavity, a fusing piece and an insulating piece, wherein the insulating piece is installed in the installation cavity and comprises a first flexible separating part and a second flexible separating part which are oppositely arranged; before the melting piece is melted, the first flexible separating part and the second flexible separating part are abutted against two side surfaces of the melting piece; after the melting piece is melted, the first flexible separating part and the second flexible separating part are attached oppositely so as to isolate the melting piece after being melted.

It can be understood that, by arranging the first flexible separating part and the second flexible separating part which are relatively attached, after the melting piece is melted, the first flexible separating part and the second flexible separating part are restored to the initial state under the restoring action of the flexible material, so that the melting piece after being melted is isolated.

In an embodiment of the present invention, the insulating member includes a first flexible separating portion, a second flexible separating portion, and a connecting portion, the connecting portion is disposed between the first flexible separating portion and the second flexible separating portion and is fixedly connected to the first flexible separating portion and the second flexible separating portion, and the first flexible separating portion and the second flexible separating portion are relatively attached to each other under the action of the connecting portion.

It can be understood that, by providing the connection portion to connect the first flexible separator and the second flexible separator, the first flexible separator and the second flexible separator are relatively attached to each other by the connection portion, so that the fusing member can be sandwiched.

In one embodiment of the invention, the connection portion is provided with a through hole, and the heat absorbing member is poured into the mounting chamber through the through hole.

It can be understood that, through the through hole opened in the middle of the connecting portion, the energy absorbing member can be injected from the position of the through hole toward the positions of the first flexible separator and the second flexible separator.

In an embodiment of the present invention, the first flexible partitioning portion and the second flexible partitioning portion of the insulating member are separately provided, and the first flexible partitioning portion and the second flexible partitioning portion respectively abut against opposite inner walls of the mounting chamber, so that the first flexible partitioning portion and the second flexible partitioning portion can be relatively attached to each other.

It can be understood that the first flexible partition part and the second flexible partition part are relatively attached under the extrusion of the inner wall of the shell so as to be capable of clamping a melting piece.

In one embodiment of the present invention, the separator further includes a first protection portion and a second protection portion, the first protection portion is disposed on one side of the first flexible separation portion, which abuts against the inside of the housing, and the width of the first protection portion is greater than the width of the first flexible separation portion; the second protection part is arranged on one side of the second flexible separating part abutted to the inside of the shell, and the width of the second protection part is larger than that of the second flexible separating part.

It can be understood that the first protection part and the second protection part are arranged to isolate a large amount of energy released by the melting part in the melting process so as to protect the shell.

In one embodiment of the invention, the energy absorbing member is provided in a plurality in number and fills the mounting chamber.

It can be understood that the energy absorbing element fills the installation cavity to absorb the heat generated by the fuse when the fuse melts to the maximum extent.

In an embodiment of the present invention, the housing includes a housing casing and a cover body, the housing casing is provided with a mounting cavity, one side of the housing casing is provided with a mounting opening, the melting piece is mounted to the cavity through the mounting opening, and the cover body covers the mounting opening to seal the mounting cavity and fix the melting piece.

It is understood that the melting piece can be mounted to the mounting chamber through the mounting opening by opening the mounting opening on the side of the accommodating shell.

In an embodiment of the present invention, the melting member includes a melting portion and a contact portion, the melting portion is disposed between the contact portions, the melting portion is disposed corresponding to the mounting cavity and is sandwiched between the first flexible partition portion and the second flexible partition portion, and the contact portion extends from the melting portion to the mounting cavity.

It can be understood that, by providing the melting portion at the corresponding position of the installation cavity and sandwiching the melting portion between the first flexible partition portion and the second flexible partition portion, the first flexible partition portion and the second flexible partition portion can perform a blocking function after the melting portion is melted.

In an embodiment of the invention, the melting piece further includes a limiting portion, the limiting portion is disposed on two sides of the contact portion and extends from the contact portion to two sides, the accommodating shell is provided with a limiting cavity corresponding to the limiting portion, and the limiting portion is disposed in the limiting cavity to limit movement of the melting piece.

It can be understood that the limiting part is arranged on the melting piece, and the limiting cavity is arranged on the containing shell, so that the limiting part and the limiting cavity can be matched with each other to limit the movement of the melting piece.

The invention also provides an electronic device comprising the fuse as described in any of the above.

Compared with the prior art, the fuse protector is provided with the insulating part, so that the fuse parts are prevented from being connected through an arc connection method after being melted.

Drawings

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

FIG. 1 is a schematic structural diagram of a fuse provided herein;

FIG. 2 is a cross-sectional view of the fuse shown in FIG. 1;

FIG. 3 is a schematic view of the structure of an insulating member in the fuse shown in FIG. 1;

figure 4 is a schematic view of another perspective of an insulator in the fuse shown in figure 1.

Reference numerals: 100. a fuse; 10. a housing; 11. a housing shell; 111. installing a chamber; 112. an installation port; 113. a communication port; 114. a limiting cavity; 12. a cover body; 20. a fused part; 21. a melting section; 22. a contact portion; 221. heat dissipation holes; 222. a butt joint hole; 23. a limiting part; 30. an insulating member; 31. a first flexible divider; 32. a second flexible divider; 33. a first protection part; 34. a second protection part; 35. a connecting portion; 351. a through hole; 40. an energy absorbing member.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiment in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and therefore the application is not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used in the description of the present application are for illustrative purposes only and do not represent the only embodiments.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of this application, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The fuse is a current protector that is designed to break a circuit by melting a fuse element by heat generated by the fuse element when a current exceeding a predetermined value flows therethrough, thereby protecting the circuit. The high-voltage and low-voltage protection circuit is widely applied to high-voltage and low-voltage distribution systems and control systems, is used as a short-circuit and overcurrent protector, and is one of common protection electric appliances.

In recent years, new energy automobiles are continuously developed, fuses are increasingly applied to the new energy automobiles, the existing medium-high voltage fuses are generally provided with ceramic shells to protect fuse bodies so as to realize forced arc extinction, but the ceramic shells are high in manufacturing cost and large in manufacturing difficulty, the ceramic shells are required to be polished with high precision in order to avoid damage to other electrical components, and the processing technology is long in time.

In view of the above technical problems, the present invention provides an improved fuse which is provided with a flexible partition member to partition a divided fuse element.

Referring to fig. 1 to 2, in an embodiment of the invention, a fuse 100 includes a housing 10, an insulating member 30, and a melting element 20, wherein the insulating member 30 is disposed around a portion of the melting element 20 and is installed in the housing 10; the shell 10 is provided with a mounting chamber 111 for protecting the melting piece 20 and preventing the solution melted by the melting piece 20 from damaging other devices; the insulating member 30 serves to separate the melted member 20 after the melting and to protect the case 10; the fuse element 20 is used to conduct current, and when the current passing through is large, the fuse element 20 is fused to protect the circuit.

The housing 10 includes a housing 11 and a cover 12, the housing 11 is substantially rectangular and flat, the housing 11 has an installation cavity 111, two opposite sides of the housing 11 have communication ports 113, and the side connecting the two communication ports 113 has an installation port 112, the melting piece 20 is installed in the installation cavity 111 through the installation port 112, and extends out of the housing 11 through the two communication ports 113, and the cover 12 covers the installation port 112, so that the melting piece 20 can be installed in the installation cavity 111 in a sealed manner.

In this way, the receiving case 11 is provided with the receiving chamber 111 to receive the fusion material 20, and the receiving case 11 is provided with the communication opening 113 at the side thereof to allow both ends of the fusion material 20 to protrude through the communication opening 113 at the side of the receiving case 11.

It should be noted that, the housing 10 of the conventional fuse 100 is usually made of a ceramic material, but because the manufacturing cost of the ceramic housing is high and the processing precision is high, when the ceramic housing is manufactured, high manpower and material resources are often consumed; in this embodiment, the casing 10 is made of special engineering plastics, the price of the special engineering plastics is lower than that of the ceramics, the casing 10 can be made of the special engineering plastics in an injection molding mode, the casing 10 with high matching precision can be obtained by arranging a mold with high precision, and the matching size does not need to be additionally processed, so that the manufacturing efficiency of the casing 10 is improved, and the cost can be reduced.

In the embodiment, the containing shell 11 is formed by butt joint of two special engineering plastic shells 10 which are symmetrically arranged, and the cover body 12 can easily cover the mounting opening 112, so that the installation is simple and convenient, and the processing technology is simple; in other embodiments, the containing shell 11 may be integrally formed by integral injection molding, as long as the containing shell 11 for containing the melting piece 20 can be formed.

In one embodiment of the present invention, the melting unit 20 includes a melting portion 21 and contact portions 22, the melting portion 21 is disposed between the contact portions 22 for preventing excessive current to pass therethrough, and plays a role of overload protection, and the contact portions 22 protrude out of the communication port 113 of the housing 11 for connecting an external electrical component.

Specifically, the number of the contact portions 22 is two, the contact portions 22 can protrude through the communication opening 113 of the accommodating case 11, and the middle portion of the contact portion 22 is opened with a butting hole 222 for connecting an external electrical component; the melting part 21 is arranged between the two contact parts 22, the cross-sectional area of the melting part 21 is far smaller than that of the contact parts 22, and the contact parts 22 are provided with heat dissipation holes 221 penetrating through the contact parts 22 at the positions along the central axis at the positions where the melting parts 21 are connected, so that the melting part 21 can dissipate heat in the melting process.

With the arrangement, the heat dissipation holes 221 are formed at the positions where the contact portions 22 are connected with the melting portion 21, so that the melting portion 21 can dissipate heat through the heat dissipation holes 221 in the melting process, and the situation that the melting temperature is too high and surrounding electric elements are burnt out is avoided.

In other embodiments, the present invention is not limited to the bending manner of the melting portion 21, and the melting portion 21 may be provided with a plurality of bent portions folded back, a zigzag shape, an X shape, or the like, as long as the contact portions 22 at both ends can be connected by the melting portion 21; it should be understood that, although the shape of the fusion zone 21 may be provided in a variety of shapes and patterns, the shape or pattern provided should meet practical design requirements and practical applications to prevent damage to other electrical components during use.

Further, in order to limit the position of the melting piece 20 in the installation cavity 111, the melting piece 20 further includes a limiting portion 23, and the limiting portion 23 is disposed at one end of the contact portion 22 relatively close to the melting portion 21 and extends from the contact portion 22 towards two sides; the position of the communicating port 113 on the two sides of the containing shell 11 is provided with a limiting cavity 114 matched with the limiting part 23, after the melting part 20 is installed in the installation cavity 111, the limiting part 23 can be correspondingly installed in the limiting cavity 114, the limiting part 23 is abutted against the side wall of the limiting cavity 114 through mutual abutting, and the cover body 12 is abutted against the limiting part 23, so that the moving range of the melting part 20 in the installation cavity 111 is limited.

In other embodiments, the stopper hole may be formed in the melting piece 20, the stopper portion 23 may be correspondingly formed in the casing 10, and the movable range of the melting piece 20 may be limited by the engagement between the stopper hole and the stopper portion 23.

In addition, in the present embodiment, the contact portion 22 and the melting portion 21 are made of conductive materials, including but not limited to copper, silver, zinc, aluminum, tin, and the like, and alloys or combinations of these materials, and the melting portion 21 and the contact portion 22 are integrally formed in the manufacturing process. However, the present invention is not limited to the connection method between the melting portion 21 and the contact portion 22, and the contact portion 22 and the melting portion 21 may be fixedly connected by welding in other embodiments as long as the contact portion 22 and the melting portion 21 are fixedly connected.

In the operation of the fuse 100, current flows from the contact portion 22 at one end to the contact portion 22 at the other end through the melting portion 21, and the current flows normally; when the current is overloaded, the melting part 21 may melt or vaporize under the action of high current, and release a large amount of energy, which may burn the shell 10 made of special engineering material and damage the surrounding electrical components; therefore, in one embodiment of the present invention, the fuse 100 further includes an energy absorbing member 40, the energy absorbing member 40 being disposed in the mounting chamber 111 so as to be capable of absorbing energy released when the melting portion 21 is melted; preferably, the energy absorbing member 40 is provided in a plurality in number to fill the installation chamber 111 and thereby absorb energy released from the melt 20 during melting.

It should be noted that the invention is not limited to filling the mounting cavity 111 with the energy absorbing member 40, but in other embodiments, the energy absorbing member 40 may be accommodated in a slightly smaller amount than the mounting cavity 111, as long as the energy absorbing member 40 can absorb the energy released by the melting member 20.

In the present embodiment, the energy absorbing member 40 is made of quartz sand, but the present invention is not limited to absorbing the energy released from the melting member 20 by the quartz sand, and in other embodiments, the energy released from the melting member 20 may be absorbed by other energy absorbing members 40, such as: clay, dolomite, and the like.

Furthermore, the invention is not limited to the energy absorbing member 40 filling the installation cavity 111, but in other embodiments, the energy absorbing member 40 may be slightly smaller than the installation cavity 111, as long as the energy absorbing member 40 can absorb the energy released from the melting member 20.

Further, referring to fig. 3 to 4, in order to prevent the fuse element 20 from being connected to each other by an arc after being melted, the fuse 100 further includes an insulating element 30, and the insulating element 30 is installed in the installation cavity 111 and disposed corresponding to the melting portion 21 to separate the melted fuse element 20.

Specifically, the insulating member 30 includes a first flexible partition portion 31 and a second flexible partition portion 32 which are oppositely disposed, wherein the first flexible partition portion 31 and the second flexible partition portion 32 are separately disposed, and when the first flexible partition portion 31 and the second flexible partition portion 32 are mounted to the mounting chamber 111, the first flexible partition portion 31 and the second flexible partition portion 32 can respectively abut against the opposite inner walls of the mounting chamber 111, so that the first flexible partition portion 31 and the second flexible partition portion 32 can be relatively attached to sandwich the melting portion 21; before the fusion material 20 is fused, the first flexible separating part 31 and the second flexible separating part 32 partially sandwich two side surfaces of the fusion material 20, and the rest parts are relatively attached; after the melting piece 20 is melted, the first flexible separating portion 31 and the second flexible separating portion 32 are attached to each other under the recovery action of the flexible material, so as to isolate the melted piece 20 after being melted.

In this way, by providing the first flexible partitioning portion 31 and the second flexible partitioning portion 32 which are attached to each other, the first flexible partitioning portion 31 and the second flexible partitioning portion 32 can isolate the melted melting material 20 from each other after the melting material 20 is melted.

Further, in order to isolate the heat generated by the melting piece 20 in the melting process and protect the casing 10, the insulating piece 30 further includes a first protection portion 33 and a second protection portion 34, the first protection portion 33 is disposed on one side of the first flexible partition portion 31, which abuts against the inside of the mounting cavity 111, and the width of the first protection portion 33 is greater than that of the first flexible partition portion 31; the second protection part 34 is arranged on one side of the second flexible partition part 32, which is abutted against the inside of the mounting cavity 111, and the width of the second protection part 34 is greater than that of the second flexible partition part 32; so that the first and second guards 33 and 34 can protect the inner wall of the installation chamber 111 and prevent the energy released from the fusion material 20 during the fusion process from damaging the case 10.

In another embodiment of the present invention, the insulating member 30 further includes a connecting portion 35, the connecting portion 35 is disposed between the first protecting portion 33 and the second protecting portion 34, and is fixedly connected to the first protecting portion 33 and the second protecting portion 34, so that the first flexible separating portion 31, the second flexible separating portion 32, the first protecting portion 33, and the second protecting portion 34 are connected to form a whole through the connecting portion 35, the first flexible separating portion 31 and the second flexible separating portion 32 are relatively attached to each other under the action of the connecting portion 35, so as to be able to sandwich the melting portion 21 of the melting member 20, and after the melting member 20 is melted, the first flexible separating portion 31 and the second flexible separating portion 32 are attached to each other under the restoring action of the flexible material, so as to isolate the melted member 20.

In addition, in order to enable the energy absorbing member 40 to fill the mounting chamber 111, a through hole 351 penetrating through the connecting portion 35 is further formed in the middle of the connecting portion 35, and the energy absorbing member 40 can enter between the first flexible separating portion 31 and the second flexible separating portion 32 through the through hole 351 to absorb energy generated in the melting process of the melting portion 21.

In the present embodiment, the two ends of the connecting portion 35 are respectively connected to the first protecting portion 33 and the second protecting portion 34, so that the first flexible separating portion 31 mounted on the first protecting portion 33 and the second flexible separating portion 32 mounted on the second protecting portion 34 can be attached to each other by the action of the connecting portion 35, and in other embodiments, the two ends of the connecting portion 35 can be respectively connected to the first flexible separating portion and the second flexible separating portion 32, as long as the first flexible separating portion and the second flexible separating portion 32 can be attached to each other.

It should be noted that, in the present embodiment, the first flexible partition 31 and the second flexible partition 32 are made of flexible materials, for example: the first flexible separating portion 31 and the second flexible separating portion 32 can return to the initial state under the action of the flexible material after being pressed, and in other embodiments, the first flexible separating portion 31, the second flexible separating portion 32, the first protection portion 33, the second protection portion 34, and the connecting portion 35 are made of flexible materials, so long as the first flexible separating portion 31 and the second flexible separating portion 32 can be attached to each other under the return action of the flexible materials to isolate the fused part 20 after being fused.

The present invention also provides an electronic device including the fuse 100 as described above, and an electrical device having the fuse 100 can be replaced only by replacing the fuse 100 in the case of an overload, and it is not necessary to replace another electrical element damaged by a large amount of energy released from the fuse 100, thereby reducing the failure rate.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims (10)

1. A fuse, characterized in that the fuse comprises a housing (10) having a mounting chamber (111), a fuse element (20), an insulating element (30) and an energy absorbing element (40), the insulating element (30) is mounted in the mounting chamber (111), the insulating element (30) comprises a first flexible partition part (31) and a second flexible partition part (32) which are oppositely arranged, the fuse element (20) is mounted between the first flexible partition part (31) and the second flexible partition part (32), both ends of the fuse element (20) extend out of the housing (10), and the energy absorbing element (40) is filled in the mounting chamber (111);

the first flexible partition (31) and the second flexible partition (32) abut against both side surfaces of the melting piece (20) before the melting piece (20) is melted;

after the melting piece (20) is melted, the first flexible separating part (31) and the second flexible separating part (32) are attached oppositely to isolate the melting piece (20) after being melted.

2. A fuse as per claim 1, characterised in that the insulating member (30) comprises a first flexible dividing portion (31), a second flexible dividing portion (32) and a connecting portion (35), the connecting portion (35) is arranged between the first flexible dividing portion (31) and the second flexible dividing portion (32), and the connecting portion (35) is connected at its two ends to the first flexible dividing portion (31) and the second flexible dividing portion (32), respectively, the first flexible dividing portion (31) and the second flexible dividing portion (32) being in relative abutment under the action of the connecting portion (35).

3. A fuse as per claim 2, characterised in that the connecting portion (35) is provided with a through hole (351), the energy-absorbing element (40) being fed into the mounting chamber (111) through the through hole (351).

4. A fuse as per claim 1, characterised in that said first flexible dividing portion (31) and said second flexible dividing portion (32) of said insulating member (30) are provided separately, said first flexible dividing portion (31) and said second flexible dividing portion (32) abutting against the opposite inner walls of said mounting chamber (111), respectively, so that said first flexible dividing portion (31) and said second flexible dividing portion (32) can be abutted against each other.

5. A fuse as per claim 2 or 4, characterised in that the insulating member (30) further comprises a first guard portion (33) and a second guard portion (34), the first guard portion (33) being disposed on the side of the first flexible dividing portion (31) abutting against the inner wall of the housing (10), and the width of the first guard portion (33) being greater than the width of the first flexible dividing portion (31);

the second protection part (34) is arranged on one side, abutted against the inner wall of the shell (10), of the second flexible partition part (32), and the width of the second protection part (34) is larger than that of the second flexible partition part (32).

6. A fuse as per claim 1, characterised in that said energy absorbing element (40) is provided in a plurality and fills said mounting chamber (111).

7. A fuse as per claim 1, wherein the housing (10) comprises a containing shell (11) and a cover body (12), the containing shell (11) is opened with a mounting cavity (111), one side of the containing shell (11) is opened with a mounting port (112), the fuse element (20) is mounted to the mounting cavity (111) through the mounting port (112), and the cover body (12) is covered on the mounting port (112) to close the mounting cavity (111) and fix the fuse element (20).

8. A fuse as per claim 7, characterized in that the fuse element (20) comprises a fuse portion (21) and contact portions (22), the fuse portion (21) being arranged between the contact portions (22), the fuse portion (21) being arranged in correspondence of the mounting chamber (111) and being interposed between the first flexible partition portion (31) and the second flexible partition portion (32), the contact portions (22) extending from the fuse portion (21) out of the mounting chamber (111).

9. A fuse as per claim 8, characterized in that the fuse element (20) further comprises a position limiting portion (23), the position limiting portion (23) is disposed on both sides of the contact portion (22) and extends from the contact portion (22) towards both sides, the housing shell (11) is opened with a position limiting cavity (114) corresponding to the position limiting portion (23), and the position limiting portion (23) is disposed in the position limiting cavity (114) to limit the movement of the fuse element (20).

10. An electrical device, characterized in that it comprises a fuse according to any one of claims 1 to 9.

Images