Sealed cavity chip fuse

Abstract

The invention discloses a cavity-sealed chip fuse, comprising a shell, a conductive fuse, a cover and a sealing body. The shell system comprises an opening and an airtight inner space. The conductive fuse is partially arranged in the airtight inner space of the shell, and the other part is exposed at the opening. The cover system covers the opening of the shell, and the sealing body is used to cover the shell, the cover and a part of the conductive fuse exposed at the opening, and the other part is exposed at the sealing body. The sealing body makes the inner space of the shell an airtight inner space, and the conductive fuse is directly placed in the airtight inner space, so as to prevent the arc spark generated when the fuse part is melted from contacting with the external flammable gas to cause danger. At the same time, it is also ensured that the fuse part is in the airtight cavity and will not be affected by the external environment, so that the cavity-sealed chip fuse can be applied to different environments.

Description

Technical Field

[0001] The invention relates to a chip fuse, in particular to a chip fuse arranged by surface adhesive technology. Background Art

[0002] A conventional fuse includes a conductive fuse. When the fuse is connected in series in a protected circuit loop and an abnormality occurs in the circuit (such as overcurrent), the conductive fuse will melt due to overheating, disconnecting the protected circuit loop, thereby achieving the function of protecting the circuit.

[0003] Today's fuses are used in a variety of different environments, such as factories or outer space. If used in a factory environment with flammable gases, when the conductive fuse is blown, the electric field strength at both ends of the breakpoint is extremely high, which can easily break through the air that should be an insulating medium and generate an arc. The arc will cause sparks and ignite the flammable gas, causing danger. Or if used in special environments such as outer space, there is no experimental data on what effect the unknown environment will have on the conductive fuse, which may cause the fuse to fail in outer space. Therefore, it is necessary to further improve it. Summary of the invention

[0004] In view of the above-mentioned disadvantages of the fuse, the main purpose of the present invention is to provide an improved cavity-enclosed chip fuse suitable for different environments.

[0005] The main technical means used to achieve the purpose of the above invention is to make the cavity sealed chip fuse include:

[0006] A housing including an opening and an airtight inner space;

[0007] A conductive fuse, comprising a fuse part, two intermediate parts and two conductive parts, wherein each intermediate part is connected between a corresponding end of the fuse part and the corresponding conductive part, and the fuse part and the two intermediate parts are disposed together in the inner space of the shell, and each conductive part extends out of the shell from the opening;

[0008] a cover body, covering the opening of the shell; and

[0009] A sealing colloid covers the shell, the cover and the conductive part of the conductive fuse located at the joint of the shell and the cover.

[0010] As can be seen from the above description, the cavity-sealed chip fuse of the present invention mainly uses the sealing gel to cover the shell, the cover and the conductive fuse, and the conductive part located at the joint of the shell and the cover, and part of the conductive fuse is exposed in the opening of the shell. Therefore, the gap between the shell, the cover and the conductive part can be completely sealed, so that the internal space of the shell is an airtight internal space. The fuse part of the conductive fuse is placed in the airtight internal space to prevent the arc spark generated when the fuse part is melted from contacting with the external flammable gas and causing danger; at the same time, it also ensures that the fuse part is in an airtight environment and will not be affected by the external environment, so that the cavity-sealed chip fuse can be applied to different environments.

[0011] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : A three-dimensional diagram of a first embodiment of a cavity-sealed chip fuse of the present invention.

[0013] Figure 2 : Figure 1 The exploded perspective view of the sealing body is not shown.

[0014] Figure 3 : Figure 1 Side cross-sectional view of .

[0015] Figure 4 : A plan view of the first embodiment of the conductive fuse of the present invention before bending.

[0016] Figure 5A : A plan view of the second embodiment of the conductive fuse of the present invention before bending.

[0017] Figure 5B : Figure 5A The three-dimensional image after bending.

[0018] Figure 6 : A three-dimensional view of a second embodiment of the cavity-sealed chip fuse of the present invention.

[0019] Figure 7 : A three-dimensional view of a third embodiment of the cavity-sealed chip fuse of the present invention.

[0020] Wherein, the reference numerals are:

[0021] 1a, 1b, 1c: Cavity-sealed chip fuses

[0022] 10: Shell 101: Horizontal plate

[0023] 102: upright board 11: opening

[0024] 111: first side 112: second side

[0025] 12: Internal space 20: Conductive fuse

[0026] 21: Fuse section 211: First section

[0027] 212: Part 22: Intermediary Department

[0028] 23: Conductive part 31: Perforation

[0029] 24: Perforation 30: Cover

[0030] 301: outer surface 31: third side

[0031] 32: fourth side 40: sealing body

[0032] 401: Surface DETAILED DESCRIPTION

[0033] The present invention provides an improved cavity-enclosed chip fuse, and describes the technical content of the present invention in detail with multiple embodiments and drawings.

[0034] First see Figure 1 FIG. 2 is a first embodiment of a cavity-sealed chip fuse 1 a of the present invention, which includes a housing 10 , a conductive fuse 20 , a cover 30 and a sealing gel 40 .

[0035] like Figure 2 As shown, the housing 10 includes an opening 11 and an internal space 12; in this embodiment, the housing 10 is in a long rectangular shape, which includes a rectangular horizontal plate 101 and vertical plates 102 extending vertically from four sides of the horizontal plate 101, wherein the vertical plates 102 are connected to each other to form the internal space 12 and the opening 11; and the opening 11 of the long rectangular housing 10 is in a rectangular shape, which includes two opposite first side edges 111 and two opposite second side edges 112, and the height of the two opposite first side edges 111 is higher than that of the two opposite second side edges 112; in one embodiment, as Figure 2 As shown, the first side 111 is a long side, the second side 112 is a short side, and the shell 10 is made of a ceramic material, but the present invention is not limited thereto.

[0036] like Figure 2 and Figure 4As shown, the conductive fuse 20 is fixed to the opening 11 of the housing 10, and includes a fuse part 21, two intermediary parts 22 and two conductive parts 23; in this embodiment, each of the intermediary parts 22 is integrally connected between a corresponding end of the fuse part 21 and the corresponding conductive part 23, wherein the fuse part 21 and the two intermediary parts 22 correspond to the internal space 12 of the housing 10, and are bent downward in an arc shape toward the horizontal plate 101 of the housing 10; and the two conductive parts 23 of the conductive fuse 20 are respectively arranged on the two second side edges 112 of the opening 11. In one embodiment, as Figure 4 As shown, the fuse part 21 is in a straight line shape, and the width of the fuse part 21 is smaller than the width of the intermediary parts 22. Each of the fuse parts 21 further includes a first part 211 and two second parts 212 facing each of the intermediary parts 22, wherein the first part 211 is in a straight line shape, and the width of the first part 211 is smaller than the width of each of the second parts 212, and a hole 24 is formed in each of the second parts 212, so that after the fuse part 21 is hot-melted, the holes 24 can lengthen the distance between the two ends of the fuse part 21 to reduce the probability of arc generation, and each of the conductive parts 23 further forms a through hole 231; in one embodiment, the material of the conductive fuse 20 is formed of metals such as silver, copper, nickel, tin, aluminum, zinc, or their alloys. In addition, in another embodiment, the conductive fuse 20 can also be as Figure 5A As shown, the fuse portion 21 is bent into a non-linear planar path, so that the fuse portion 21 is extended in total length without increasing the distance between the intermediary portions 22, and is used to protect a circuit with a smaller rated current (e.g., 10 amperes to 0.5 amperes); and the width D1 of the fuse portion 21 is greater than the width D2 of the intermediary portion 22; and Figure 5B As shown, the conductive fuse 20 is placed in Figure 2 Before the internal space 12 of the shell 10 shown in the figure, the fuse portion 21 and the two intermediary portions 22 of the conductive fuse 20 will also bend downward toward the horizontal plate 101 to form an arc shape, that is, the fuse portion 21 and the two intermediary portions 22 are bent away from the opening 11, and the two side edges of the fuse portion 21 are also bent in a direction away from the opening 11 to reduce the width of the fuse portion 21, so that the conductive fuse 20 can be more easily placed in the internal space 12 of the shell 10.

[0037] like Figure 2 and Figure 3 As shown, the cover 30 is covered in the opening 11 of the housing 10, so that the fuse portion 21 of the conductive fuse 20 is covered in the internal space 12 of the housing 10; in this embodiment, the cover 30 is rectangular, that is, the cover 30 includes two opposite third sides 31 and two opposite fourth sides 32, and the two fourth sides 32 are disposed on the two second sides 112 of the opening 11. Figure 1As shown, the outer surface 301 of the cover body 30 is flush with the two opposite first side edges 111 of the opening 11, so that the two conductive parts 23 of the conductive fuse 20 are respectively disposed on the two opposite second side edges 112 of the opening 11 and exposed outside the opening 11; in one embodiment, the material of the cover body 30 is a ceramic material or a plastic material.

[0038] like Figure 1 and Figure 3 As shown, the above-mentioned sealing body 40 covers the housing 10, the cover 30 and the conductive part 23 located at the covering part of the housing 10 and the cover 30, so that the gap between the housing 10, the cover 30 and the conductive part 23 is sealed by the sealing body 40; thus, the internal space 12 of the housing 10 forms an airtight internal space 12, and the conductive parts 23 of the conductive fuse 20 are partially exposed outside the sealing body 40; Figure 1 As shown, the conductive parts 23 exposed outside the encapsulation body 40 are bent toward the cover body 30 and flatly attached to the surface 401 of the encapsulation body 40 corresponding to the outer surface 301 of the cover body 30 to form the cavity-enclosed chip fuse 1a; since each of the conductive parts 23 has the hole 231, each of the conductive parts 23 is more easily bent and attached to the encapsulation body 40. In one embodiment, the encapsulation body 40 is formed by insert molding, wherein the material of the encapsulation body 40 is silicon, epoxy, nylon or engineering plastic, but not limited thereto.

[0039] In one embodiment, when the shell 10, the cover 30 and the conductive fuse 20 are assembled, the conductive portion 23 of the conductive fuse 20 is exposed outside the shell 10 but has not been bent. After the encapsulation body 40 covers the shell 10 and the cover 30, the conductive portion 23 is bent to be flat against the surface 401 of the encapsulation body 40.

[0040] See also Figure 6 The second embodiment of the chip fuse 1b of the present invention is shown in FIG. Figure 1The chip fuse 1a of the first embodiment shown is substantially the same, except that the two opposite first side edges 111 and the two opposite second side edges 112 of the opening 11 of the housing 10 of the present embodiment are at the same height, and the cover 30 is accommodated in the opening 11, that is, the outer surface 301 of the cover 30 is flush with the two first side edges 111 and the two second side edges 112 of the opening 11, so the two conductive portions 23 of the conductive fuse 20 are respectively exposed from the opening 11 facing the two second side edges 112 of the opening 11, and then the housing 10, the cover 30 and the conductive portion 23 at the joint of the housing 10 and the cover 30 are covered with a sealing body 40, and then the portions of the two conductive portions 23 exposed in the sealing body 40 are respectively bent and attached to the sealing body 40 covering the corresponding second side edges 112 and the outer side surface of the housing 10.

[0041] See also Figure 7 The third embodiment of the chip fuse 1c of the present invention is shown in FIG. Figure 6 The second embodiment shown is substantially the same; in this embodiment, the two opposite second side edges 112 of the opening 11 of the shell 10 are respectively formed with two engaging grooves 113. Since the cover body 30 is accommodated in the opening 11, the two opposite fourth side edges 32 of the cover body 30 respectively correspond to the engaging grooves 113 of the second side edge 112 of the opening 11, and two engaging members 321 are extended laterally to be tightly matched with the engaging grooves 113 of the opening 11, and the upper surface 301 of the cover body 30 is flush with the two first side edges 111 and the two second side edges 112 of the opening 11; in one embodiment, the cover body 30 is made of a plastic material.

[0042] In summary, since the sealing body covers the shell and the cover, the internal space of the shell becomes an airtight internal space, and the fuse part of the conductive fuse is placed in the airtight internal space to prevent the arc spark generated when the fuse part is melted from contacting with the external flammable gas and causing danger; at the same time, it also ensures that the fuse part is in an airtight environment and will not be affected by the external environment, so that the cavity-sealed chip fuse can be used in different environments.

[0043] The above description is only an embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above by the embodiment, it is not used to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

[0044] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims of the present invention.

Claims

1. A cavity-sealed chip fuse, characterized in that: Include: A shell including an opening and an airtight inner space, wherein the opening includes two first sides and two second sides; A conductive fuse, comprising a fuse part, two intermediate parts and two conductive parts, wherein each intermediate part is connected between a corresponding end of the fuse part and the corresponding conductive part, and the fuse part and the two intermediate parts are disposed together in the inner space of the shell, and each conductive part extends out of the shell from the opening; A cover body, covering the opening of the shell, and the outer surface of the cover body is flush with the two first side edges of the opening; as well as A sealing body covers the shell, the cover and the conductive part of the conductive fuse located at the joint of the shell and the cover, wherein the two conductive parts of the conductive fuse are partially exposed from the sealing body, the two conductive parts of the conductive fuse are respectively arranged on the two second sides of the opening, and the part of each conductive part exposed from the sealing body is bent and attached to the sealing body covering the outer surface of the corresponding cover.

2. The cavity-sealed chip fuse according to claim 1, characterized in that: The two intermediary portions and the fuse portion are bent away from the opening to form an arc shape.

3. The cavity-sealed chip fuse according to claim 2, characterized in that: The opening of the shell and the cover are rectangular, and the cover has two third sides and two fourth sides; wherein: The heights of the two first sides of the opening are higher than the heights of the two second sides; and The two fourth side edges of the cover are disposed on the two second side edges of the opening.

4. The cavity-sealed chip fuse according to claim 2, characterized in that: The opening of the shell and the cover are rectangular, and the cover has two third sides and two fourth sides, wherein: and The cover is accommodated in the opening, and the outer surface of the cover is flush with the two first side edges and the two second side edges of the opening.

5. The cavity-sealed chip fuse according to claim 2, characterized in that: The opening of the shell and the cover are rectangular, and the cover has two third sides and two fourth sides; wherein: The two second sides of the opening are respectively formed with at least one engaging groove; and The cover body is accommodated in the opening, and its two fourth sides respectively correspond to the respective snap-in grooves of the second side of the opening, and a snap-in piece extends laterally to snap into the corresponding snap-in groove; wherein the outer surface of the cover body is flush with the two first side edges and the two second side edges of the opening.

6. The cavity-sealed chip fuse according to any one of claims 1 to 5, characterized in that: The fusing portion of the conductive fuse further comprises: - Part I; and Two second parts extend from two ends of the first part and are respectively connected to the corresponding intermediate parts, wherein the two second parts respectively form a hole.

7. The cavity-sealed chip fuse according to claim 6, characterized in that: The first portion of the fuse portion is in a straight line shape; and The width of the two intermediary portions is greater than the width of the first portion of the fuse portion.

8. The cavity-sealed chip fuse according to claim 7, characterized in that: Each of the conductive portions of the conductive fuse forms a through hole.

9. The cavity-sealed chip fuse according to claim 8, characterized in that: The conductive fuse is made of metals such as silver, copper, nickel, tin, aluminum, zinc, or alloys thereof.

10. The cavity-sealed chip fuse according to any one of claims 1 to 5, characterized in that: The fuse portion of the conductive fuse is bent into a non-linear planar path.

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