WO2019144711A1

WO2019144711A1 - Surface-mounting fuse and production method therefor

Info

Publication number: WO2019144711A1
Application number: PCT/CN2018/119998
Authority: WO
Inventors: 刘莎; 胡建伟; 李向明; 杨永林
Original assignee: Aem科技(苏州)股份有限公司
Priority date: 2018-01-26
Filing date: 2018-12-10
Publication date: 2019-08-01
Also published as: CN108321063A

Abstract

Provided are a surface-mounting fuse and a production method therefor. The surface-mounting fuse comprises: an insulated shell (1) recessed inwardly on one side to form an accommodating cavity (11); a fuse wire body (2) including two conductive electrodes (22), a first bending portion (221), a second bending portion (222), and a fusing portion (21) provided between the two bending portions (221, 222); an insulated cover (3) covered on the accommodating cavity (11); and an adhesive (4) filling up a gap between the periphery of the insulated cover (3) and a side wall of the insulated shell (1). The fusing portion (21) and the bending portions (221, 222) are located in the accommodating cavity (11), and the conductive electrodes (22) protrude out of the accommodating cavity (11). The insulated cover (3) is provided with a support column (5), and the support column (5) abuts against an inner top wall of the accommodating cavity (11). The surface-mounting fuse achieves pre-positioning of the insulated cover body (3) during installation, the production method is simpler, the assembly difficulty is reduced, and the fusing property of the product is more controllable. Moreover, an arc barrier is formed between the first bending portion (221) and the second bending portion (222) respectively arranged at two ends of the fuse wire body, so as to effectively improve the arc extinguishing effect.

Description

Surface mount fuse and production method thereof

Technical field

The present invention relates to the field of electrical protection components, and more particularly to a surface mount fuse and a method of producing the same.

Background technique

Fuses, commonly used as circuit protection devices, form an electrical connection with the components to be protected in the circuit. One type of fuse, including a melt disposed within a hollow, insulative housing, can melt and interrupt the circuit when a fault condition such as an overcurrent condition occurs in the circuit to avoid damage to the protected component or circuit. In the past, fuses, melt and welding end caps have a split structure. On the one hand, the structure of the fuse is complicated, the production cost is high, and on the other hand, the melt and the end cap of the split structure are easily assembled and assembled. Poor contact occurs, affecting the normal operation of the circuit.

Patent CN201320839953 discloses a patch fuse structure comprising a metal sheet comprising a fuse line and an electrode for soldering, an outer cover, an explosion-proof layer and a highly thermally conductive layer laid underneath. The outer cover and the explosion-proof layer enclose a hollow cavity and a gas chamber. The structure is difficult to place horizontally due to the use of an explosion-proof layer and a suspended seal. At the same time, the dimensional tolerances of the various parts of the fuse are required to be high, resulting in uneven thickness of the high thermal conductive layer or adhesive underneath, even during the curing process. A large amount of infiltration into the hollow pockets and the air chamber affects the melting characteristics of the product. In addition, the structure does not have an ideal arc extinguishing effect after the fuse is blown, which may cause cracking of the fuse body during overcurrent, and may even damage the protected circuit and surrounding circuit components.

Summary of the invention

In order to overcome the deficiencies of the prior art, it is an object of the present invention to provide a surface mount fuse which is simpler in production and more controllable in the melting characteristics of the product.

It is a further object of the present invention to provide a method of producing the surface mount fuse.

In order to achieve the above object, the present invention provides a surface mount fuse comprising:

An insulating housing, one side of the insulating housing is recessed inward to form a receiving cavity;

a fuse main body, the fuse main body includes a first conductive electrode, a second conductive electrode, and a fuse portion disposed between the first conductive electrode and the second conductive electrode, wherein the fuse portion is located in the fuse Inside the cavity, the first conductive electrode and the second conductive electrode protrude from the accommodating cavity; the first conductive electrode and the fuse portion have a first bent portion, and the second conductive electrode a second bent portion is disposed between the fuse portion and the second bent portion; the first bent portion and the second bent portion are located in the receiving cavity;

An insulating cover body, the insulating cover body is disposed on the accommodating cavity;

An adhesive filling the gap between the periphery of the insulating cover and the sidewall of the insulating housing;

It is characterized in that

The insulating cover body is provided with a support column, the support column is in contact with the inner top wall of the accommodating cavity, and the support column is between the first bent portion and the second bent portion cut off.

Through the arrangement of the support column, the predetermined position of the insulating cover body during installation is realized, and the adhesive does not flow into the accommodating cavity during the process of closing the entire accommodating cavity, so that the surface mount fuse is produced. It is simpler, reduces assembly difficulty, and the product's fusing characteristics are more controllable. The number of the support columns may be any number. Similarly, the shape of the support columns may not be limited, and the support for the insulating cover body may be satisfied. The first bent portion and the second bent portion are separated by the support column, so that after the fuse is blown, between the first bent portion and the second bent portion The support column constitutes an arc barrier, so that no arc is generated between the two, and the arc extinguishing effect is effectively improved.

Preferably, a side of the support post adjacent to the insulative housing is recessed inwardly to form a retreat slot, the fuse body is disposed in the escape slot, and an inner top wall of the escape slot and the fuse portion are The lower surface is close to or in contact. The support column between the inner top wall of the escape groove and the insulating cover body blocks the first bent portion and the second bent portion to form an arc barrier.

Further preferably, a plurality of the support columns are arranged in parallel along the length direction of the insulating cover.

Further preferably, the escape groove has an "n" shape, and a longitudinal center line of the escape groove coincides with a longitudinal center line of the support column.

Preferably, a plurality of the fuses are connected in parallel between the first conductive electrode and the second conductive electrode, and the support pillars are disposed between the fuses. The support column is arranged in a flexible manner, and the plurality of fuse portions may be located in the same structure of the similar escape groove, or may be located in different structures similar to the escape groove, and at least a part of the support column passes between the adjacent fuse portions. The gap is in contact with the inner top wall of the receiving cavity of the insulative housing. As long as the positioning support and the blocking action on at least part of the first bent portion and at least part of the second bent portion can be realized.

Further preferably, the fuse portion includes at least a first fuse portion and a second fuse portion connected in parallel between the first conductive electrode and the second conductive electrode, and the support post is disposed at the first fuse portion And between the second fuses.

Further preferably, the surface of the support column is coated with the arc extinguishing material by means of wetting or the like.

Further preferably, the arc extinguishing material contains one or more of a metal hydrate, a hydrous silicate mineral, a hydrous aluminosilicate mineral, and a silica gel material with a flame retardant.

Further preferably, the support column has a wedge shape, and the accommodating cavity is filled with arc extinguishing particles. The wedge-shaped support column is easier to displace the surrounding arc-extinguishing particles, so as to facilitate the insertion into the insulating shell filled with the arc-quenching particles to achieve the limit sealing, and the structure can ensure the compactness of the arc-quenching particles.

Further preferably, the arc extinguishing particles comprise one or more of quartz sand, hollow glass microspheres, and hollow ceramic microspheres.

Further preferably, the bottom surface of the insulating cover is also coated with the adhesive, so that the connection structure between the insulating cover and the insulating cover is more stable.

The invention also provides a method for producing a surface mount fuse, which comprises the following steps:

S1, lithographically etching or blanking a whole piece of conductive metal material to form a plurality of connected fuse matrices, integrally plating a low melting point metal layer on the surface of the fuse matrix, and bending and forming the fuse matrix Forming a curved fuse matrix including a bent portion and a horizontal portion;

S2, implanting an insulating housing into the first loading board preset according to the arrangement of the curved fuse matrix to form an insulating housing matrix, the opening of the insulating housing is oriented in an orientation;

S3. Assembling a corresponding position of the curved fuse matrix onto the insulating housing matrix, wherein each of the bent portions of the curved fuse matrix is located in the insulating housing in the insulating housing matrix In the cavity

S4, the insulating cover body is implanted into the second loading plate preset according to the arrangement of the curved fuse matrix to form an insulating cover body matrix, and the supporting columns of the insulating cover body face in a uniform orientation;

S5, assembling a corresponding position of the insulating cover matrix to the insulating housing matrix on which the fuse main body is mounted, the supporting post and the inner top wall of the insulating housing are in contact with each other;

S6, filling a gap between the periphery of the insulating cover and the sidewall of the insulating casing, and curing;

S7, cutting or punching the horizontal portion of the curved fuse matrix, and bending a portion of the horizontal portion beyond an outer side of the insulating housing to an outer sidewall of the insulating housing to form the surface mount Fuse.

Preferably, after step S4, the insulating cover matrix is wetted on the surface of the support column coated with arc extinguishing material, and then step S5;

Preferably, after step S3, the arc extinguishing particles are filled in the accommodating cavity, and then step S4 is performed; the support column has a wedge shape.

The beneficial effects of the invention are:

Compared with the prior art, the surface mount fuse provided by the present invention realizes the pre-positioning of the insulating cover body during installation by the arrangement of the support column, and ensures that the adhesive is in the process of closing the entire accommodating cavity. It does not or rarely flows into the accommodating cavity, which makes the production method of the surface mount fuse simpler, reduces the assembly difficulty, and the fuse characteristics of the product are more controllable; at the same time, the support column limits the insulating cover At the same time, the arc barrier is formed between the first bent portion and the second bent portion of the two ends of the fuse main body, thereby effectively improving the arc extinguishing effect.

Further, coating the arc extinguishing material on the support column can significantly improve the arc extinguishing effect of the fuse; the wedge support column is easier to discharge the surrounding arc extinguishing particles, so as to facilitate the insertion into the insulating shell filled with the arc extinguishing particles. The insulating cover body compacts the arc extinguishing particles in the accommodating cavity of Tiancong to ensure the compactness of the arc extinguishing particles.

The invention provides a method for producing a surface mount fuse, which realizes matrix assembly for a surface mount fuse containing a support column, and can prepare a plurality of fuses at a time, and has a simple preparation process and greatly improves production efficiency. .

DRAWINGS

1 is an exploded view of a surface mount fuse according to Embodiment 1 of the present invention;

2 is a schematic structural view of a surface mount fuse according to Embodiment 1 of the present invention;

3 is a schematic structural view of a surface mount fuse according to a second embodiment of the present invention;

4 is a schematic structural view of a surface mount fuse according to a third embodiment of the present invention;

Figure 5 is a schematic structural view of a surface mount fuse according to a fourth embodiment of the present invention;

Figure 6 is an exploded view of a surface mount fuse of a fourth embodiment of the present invention;

Fig. 7 is a structural schematic view showing a support post of a surface mount fuse according to a fifth embodiment of the present invention.

In the drawings, 1-insulating housing; 11-receiving cavity; 2-fuse body; 21-fuse portion; 22-conductive electrode; 221-first bent portion; 222-second bent portion; Cover; 4-binder; 5-support column; 51-avoidance groove; 6-arc particle; 7-arc material.

The invention will be further described with reference to the drawings and specific embodiments.

Detailed ways

The invention will be further clarified by the specific examples of the invention given below, but they are not intended to limit the invention.

Embodiment 1

As shown in FIG. 1-2, the embodiment provides a surface mount fuse including an insulative housing 1 having a receiving cavity 11 recessed on one side, two conductive electrodes 22, and two conductive electrodes. The fuse body 2 of the fuse portion 21 between the 22, the insulating cover 3 covered on the accommodating chamber 11, and the adhesive filling the gap between the periphery of the insulating cover 3 and the side wall of the insulating case 1 4, the two conductive electrodes 22 are respectively a first conductive electrode and a second conductive electrode, and the first conductive electrode and the fuse portion 22 have a first bent portion 221, and the second conductive electrode and the fuse portion 22 There is a second bent portion 222. The first bent portion 221 and the second bent portion 222 are located in the accommodating cavity, and the conductive electrode 22 extends out of the accommodating cavity 11 for electrical connection with the circuit. The support cap 5 is provided with a support column 5, and the support post 5 is in contact with the inner top wall of the accommodating cavity 11, and the first bent portion 221 and the second bent portion 222 are separated by the support column 5, that is, the first The accommodating cavity between the bent portion 221 and the second bent portion 222 is substantially divided into two parts by the support column 5 to block the two (ie, the first bent portion 221 and the second bent portion 222). An arc generated between.

In this embodiment, a plurality of support columns 5 are arranged in parallel along the longitudinal direction of the insulating cover 3, and the width direction of each support post 5 is parallel to the width direction of the insulating cover 3, and the side of the support post 5 close to the insulating case 1 The relief groove 51 is recessed inwardly, and the inner top wall of the escape groove 51 abuts or comes into contact with the lower surface of the fuse portion 22, thereby ensuring that almost all of the first bent portion 221 and the second bent portion 222 are blocked. The longitudinal section of the escape groove 51 is of an "n" shape, and the longitudinal center line of the escape groove 51 coincides with the longitudinal center line of the support column 5, the fuse portion 21 of the fuse body 2 is bored in the escape groove 51, and the fuse portion 21 is located. The chamber 11 is placed in the middle of the width direction.

The method for manufacturing the surface mount fuse of the embodiment includes the following steps:

S1, lithographically etching or blanking a whole piece of conductive metal material to form a plurality of connected fuse matrices, integrally plating a low melting point metal layer on the surface of the fuse matrix, and bending and forming the fuse matrix Forming a curved fuse matrix including a bent portion and a horizontal portion, the fuse portion 21 is located at the bent portion, and the conductive electrode 22 is located at the horizontal portion;

S2, the insulating housing 1 is implanted into the first loading plate preset according to the arrangement of the curved fuse matrix to form an insulating housing matrix, and the opening of the insulating housing 1 is aligned;

S3, assembling corresponding positions of the curved fuse matrix to the insulating housing matrix, each of the bent portions of the curved fuse matrix being located in a receiving cavity of the insulating housing 1 in the insulating housing matrix 11;

S4, the insulating cover body 3 is implanted into the second loading plate preset according to the arrangement of the curved fuse matrix to form an insulating cover body matrix, and the orientation of the support columns 5 fixedly disposed on the insulating cover body 3 is uniform;

S5, assembling corresponding positions of the insulating cover matrix to the insulating housing matrix with the fuse main body 2, the support post 5 and the inner top wall of the insulating housing 1 colliding;

Embodiment 2

As shown in FIG. 3, the present embodiment provides a surface mount fuse including an insulative housing 1 having a receiving cavity 11 formed therein inwardly and recessed, including two conductive electrodes 22, and two conductive electrodes 22 disposed thereon. The fuse body 2 of the intervening portion 21, the insulating cover 3 covered on the accommodating chamber 11, and the adhesive 4 filling the gap between the periphery of the insulating cover 3 and the side wall of the insulating case 1, The two conductive electrodes 22 are respectively a first conductive electrode and a second conductive electrode, and the first conductive electrode and the fuse portion 22 have a first bent portion 221, and the second conductive electrode and the fuse portion 22 have The second bent portion 222, the first bent portion 221 and the second bent portion 222 are located in the accommodating cavity, and the conductive electrode 22 protrudes from the accommodating cavity 11 for electrical connection with the circuit. A support post 5 is disposed on the insulating cover 3, and the support post 5 is in contact with the inner top wall of the accommodating cavity 11, and the first bent portion 221 and the second bent portion 222 are separated by the support post 5 to block The arc generated between the two.

In this embodiment, two support columns 5 are arranged in parallel along the longitudinal direction of the insulating cover 3, and the width direction of each support post 5 is parallel to the width direction of the insulating cover 3, and the side of the support post 5 close to the insulating case 1 The relief groove 51 is recessed inwardly, and the inner top wall of the escape groove 51 abuts or comes into contact with the lower surface of the fuse portion 22, thereby ensuring that almost all of the first bent portion 221 and the second bent portion 222 are blocked. The longitudinal section of the escape groove 51 is of an "n" shape, and the longitudinal center line of the escape groove 51 coincides with the longitudinal center line of the support column 5, the fuse portion 21 of the fuse body 2 is bored in the escape groove 51, and the fuse portion 21 is located. The chamber 11 is placed in the middle of the width direction.

The difference from the first embodiment is that the surface of the support post 5 of the present embodiment near the position of the fuse portion 21 is coated with the arc extinguishing material 7 by wetting or the like for extinguishing the arc generated by the fuse portion 21. The arc extinguishing material 7 contains one or more of a metal hydrate, a hydrous silicate mineral and a hydrous aluminosilicate mineral, and can be thermally decomposed in time when the fuse portion 21 is melted, absorbs a large amount of heat and releases water vapor, and quenches the arc. . The arc extinguishing material 7 may further contain a silica gel material with a flame retardant, and the flame retardant may be a melamine or the like. The bottom surface of the insulating cover 3 is also coated with an adhesive 4 to make the bonding more reliable. The bottom surface of the insulating cover 3 refers to the side away from the insulating housing 1.

S41, the insulating cover body matrix is wetted or the like on the surface of the support column 5 coated with arc extinguishing material 7;

S6, filling the gap between the periphery of the insulating cover 5 and the side wall of the insulating case 1 with the adhesive 4, while applying the adhesive 4 to the bottom surface of the insulating cover 5, and curing;

S7, cutting or punching the horizontal portion of the curved fuse matrix, and bending a portion of the horizontal portion beyond the outer side of the insulating casing to an outer side wall of the insulating casing 1 to form the surface mount fuse Device.

Embodiment 3

As shown in FIG. 4, the embodiment provides a surface mount fuse including an insulative housing 1 having a receiving cavity 11 formed therein inwardly recessed, including two conductive electrodes 22, and two conductive electrodes 22 disposed thereon. The fuse body 2 of the intervening portion 21, the insulating cover 3 covered on the accommodating chamber 11, and the adhesive 4 filling the gap between the periphery of the insulating cover 3 and the side wall of the insulating case 1, The two conductive electrodes 22 are respectively a first conductive electrode and a second conductive electrode, and the first conductive electrode and the fuse portion 22 have a first bent portion 221, and the second conductive electrode and the fuse portion 22 have The second bent portion 222, the first bent portion 221 and the second bent portion 222 are located in the accommodating cavity, and the conductive electrode 22 protrudes from the accommodating cavity 11 for electrical connection with the circuit. A support post 5 is disposed on the insulating cover 3, and the support post 5 is in contact with the inner top wall of the accommodating cavity 11, and the first bent portion 221 and the second bent portion 222 are separated by the support post 5 to block The arc generated between the two.

The difference from the first embodiment is that the support column 5 in the embodiment has a wedge shape, and the accommodating cavity 11 is filled with arc extinguishing particles 6 , and the arc extinguishing particles 6 contain quartz sand, hollow glass microspheres and hollow ceramic microspheres. One or several. The wedge-shaped support column is easier to displace the surrounding arc-extinguishing particles, so as to facilitate the insertion into the insulating shell filled with the arc-quenching particles to achieve the limit sealing, and the structure can ensure the compactness of the arc-quenching particles.

S31, in the accommodating cavity 11 of the insulating housing 1 is filled with arc extinguishing particles 6;

S5, assembling a corresponding position of the insulating cover matrix to the insulating housing matrix with the fuse main body 2, the supporting post 5 and the inner top wall of the insulating housing 1 colliding;

S6, filling the gap between the periphery of the insulating cover 5 and the side wall of the insulating case 1 and curing the adhesive 4;

Embodiment 4

As shown in FIG. 5-6, the embodiment provides a surface mount fuse including an insulative housing 1 having a receiving cavity 11 recessed on one side, two conductive electrodes 22, and two conductive electrodes. The fuse body 2 of the fuse portion 21 between the 22, the insulating cover 3 covered on the accommodating chamber 11, and the adhesive filling the gap between the periphery of the insulating cover 3 and the side wall of the insulating case 1 4, the two conductive electrodes 22 are respectively a first conductive electrode and a second conductive electrode, and the first conductive electrode and the fuse portion 22 have a first bent portion 221, and the second conductive electrode and the fuse portion 22 There is a second bent portion 222. The first bent portion 221 and the second bent portion 222 are located in the accommodating cavity, and the conductive electrode 22 extends out of the accommodating cavity 11 for electrical connection with the circuit.

The fuse portion in this embodiment includes two fuse portions arranged in parallel and connected in parallel with each other, and the two fuse portions are disposed between the first bent portion 221 and the second bent portion 222. A support post 5 is disposed on the insulating cover 3, and the support post 5 is in contact with the inner top wall of the accommodating cavity 11, and the first bent portion 221 and the second bent portion 222 are separated by the support post 5 to block The arc generated between the two.

In this embodiment, the two support columns 5 are arranged in parallel along the longitudinal direction of the insulating cover 3, the width direction of each support post 5 is parallel to the width direction of the insulating cover 3, and the cut surface of the support post 5 is T-shaped. The portion is disposed along the gap between the two fuse portions and is in contact with the inner top wall of the accommodating chamber 11, and the upper walls of the two sides are respectively brought into close contact or contact with the two fuse portions, thereby ensuring the first bent portion 221 and The second bent portion 222 is almost entirely blocked.

Embodiment 5

The present embodiment provides a surface mount fuse including an insulative housing 1 having a receiving cavity 11 recessed inwardly, and a fuse portion 21 including two conductive electrodes 22 and disposed between the two conductive electrodes 22. The fuse body 2, the insulating cover 3 covering the accommodating cavity 11 and the adhesive 4 filling the gap between the periphery of the insulating cover 3 and the side wall of the insulating case 1, the two conductive electrodes 22 respectively The first conductive electrode and the second conductive electrode have a first bent portion 221 between the first conductive electrode and the fuse portion 22, and a second bent portion 222 between the second conductive electrode and the fuse portion 22 The first bent portion 221 and the second bent portion 222 are located in the accommodating cavity, and the conductive electrode 22 protrudes from the accommodating cavity 11 for electrical connection with the circuit. A support post 5 is disposed on the insulating cover 3, and the support post 5 is in contact with the inner top wall of the accommodating cavity 11, and the first bent portion 221 and the second bent portion 222 are separated by the support post 5 to block The arc generated between the two.

In this embodiment, as shown in FIG. 7, the width direction of the support post 5 is oblique to the width direction of the insulating cover 3, and the side of the support post 5 adjacent to the insulative housing 1 is recessed inwardly to form the escape groove 51, and the escape groove 51 is omitted. The inner top wall abuts or contacts the lower surface of the fuse portion 22, ensuring that almost all of the first bent portion 221 and the second bent portion 222 are blocked. The longitudinal section of the escape groove 51 is of an "n" shape, and the longitudinal center line of the escape groove 51 coincides with the longitudinal center line of the support column 5, the fuse portion 21 of the fuse body 2 is bored in the escape groove 51, and the fuse portion 21 is located. The chamber 11 is placed in the middle of the width direction.

This embodiment provides a method for disposing the support column 5, which is intended to illustrate various configurations of the support column 5. The specific structure, number, arrangement, and the like can be selected as long as the pair of insulating covers can be realized. The positioning support of 3 and the blocking action on at least a portion of the first bent portion 221 and at least a portion of the second bent portion 222 are all within the scope of the inventive concept of the present invention.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and the equivalent changes made by the scope of the present invention remain within the scope of the present invention.

Claims

A surface mount fuse comprising:

An insulating housing, one side of the insulating housing is recessed inward to form a receiving cavity;

a fuse main body, the fuse main body includes a first conductive electrode, a second conductive electrode, and a fuse portion disposed between the first conductive electrode and the second conductive electrode, wherein the fuse portion is located in the fuse Inside the cavity, the first conductive electrode and the second conductive electrode protrude from the accommodating cavity; the first conductive electrode and the fuse portion have a first bent portion, and the second conductive electrode a second bent portion is disposed between the fuse portion and the second bent portion; the first bent portion and the second bent portion are located in the receiving cavity;

An insulating cover body, the insulating cover body is disposed on the accommodating cavity;

An adhesive filling the gap between the periphery of the insulating cover and the sidewall of the insulating housing;

It is characterized in that

The insulating cover body is provided with a support column, the support column is in contact with the inner top wall of the accommodating cavity, and the support column is between the first bent portion and the second bent portion cut off.
The surface mount fuse according to claim 1, wherein a side of the support post adjacent to the insulating case is recessed inwardly to form a relief groove, and the fuse body is disposed in the escape groove. The inner top wall of the escape groove is in close contact or contact with the lower surface of the fuse portion.
The surface mount fuse according to claim 2, wherein a plurality of said support columns are disposed in parallel along a longitudinal direction of said insulating cover.
The surface mount fuse according to claim 2, wherein the escape groove has an "n" shape.
A surface mount fuse according to claim 1, wherein a plurality of said fuse portions are connected in parallel between said first conductive electrode and said second conductive electrode, said support column being disposed at said fuse Between the ministries.
The surface mount fuse according to claim 5, wherein the fuse portion includes at least a first fuse portion and a second fuse portion connected in parallel between the first conductive electrode and the second conductive electrode The support column is disposed between the first fuse portion and the second fuse portion.
The surface mount fuse of claim 1 wherein the surface of the support post is coated with an arc extinguishing material.
The surface mount fuse according to claim 1, wherein a surface of the insulating cover that is away from the accommodating cavity is also coated with the adhesive.
The surface mount fuse according to any one of claims 1-8, wherein the support column has a wedge shape, and the accommodating cavity is filled with arc extinguishing particles.
The surface mount fuse according to claim 1, wherein a width direction of said support post is oblique or parallel to a width direction of said insulating cover.
A method for producing a surface mount fuse, comprising the steps of:

S1, lithographically etching or blanking a whole piece of conductive metal material to form a plurality of connected fuse matrices, integrally plating a low melting point metal layer on the surface of the fuse matrix, and bending and forming the fuse matrix Forming a curved fuse matrix including a bent portion and a horizontal portion;

S2, implanting an insulating housing into the first loading board preset according to the arrangement of the curved fuse matrix to form an insulating housing matrix, the opening of the insulating housing is oriented in an orientation;

S3. Assembling a corresponding position of the curved fuse matrix onto the insulating housing matrix, wherein each of the bent portions of the curved fuse matrix is located in the insulating housing in the insulating housing matrix In the cavity

S4, the insulating cover body is implanted into the second loading plate preset according to the arrangement of the curved fuse matrix to form an insulating cover body matrix, and the supporting columns of the insulating cover body face in a uniform orientation;

S5, assembling a corresponding position of the insulating cover matrix to the insulating housing matrix on which the fuse main body is mounted, the supporting post and the inner top wall of the insulating housing are in contact with each other;

S6, filling a gap between the periphery of the insulating cover and the sidewall of the insulating casing, and curing;

S7, cutting or punching the horizontal portion of the curved fuse matrix, and bending a portion of the horizontal portion beyond an outer side of the insulating housing to an outer sidewall of the insulating housing to form the surface mount Fuse.
The method of manufacturing a surface mount fuse according to claim 11, wherein after the step S4, the insulating cover body matrix is wetted by applying an arc extinguishing material to the surface of the support post, and then performing Step S5.
The method of manufacturing a surface mount fuse according to claim 11, wherein after the step S3, the arc extinguishing particles are filled in the accommodating chamber, and then the step S4 is performed.
The method of producing a surface mount fuse according to claim 13, wherein the support post has a wedge shape.