Shell assembly of thermal fuse and thermal fuse

Abstract

The utility model discloses a shell assembly of a thermal fuse and the thermal fuse, and relates to the technical field of thermal fuses. In the shell assembly of the thermal fuse, a first outer metal cover body covers the upper end of an insulating shell, and a first conductive mounting column is arranged on the first outer metal cover body in a protruding manner and is integrally connected with the first outer metal cover body; the first conductive mounting column is provided with a first threaded connection structure, and the first threaded connection structure is used for being in threaded connection with a circuit device; the second outer metal cover body covers the lower end of the insulating shell; the second conductive mounting column is convexly arranged on the second outer metal cover body and is integrally connected with the second outer metal cover body; the second conductive mounting column is provided with a second threaded connection structure, and the second threaded connection structure is used for being in threaded connection with a circuit device. Under the condition that the first outer metal cover body and the second outer metal cover body are arranged in a light and thin mode, it can be ensured that threaded connection has enough connection strength.

Description

Technical Field

[0001] The present application relates to the technical field of thermal fuses, and in particular to a housing assembly of a thermal fuse and a thermal fuse. Background Art

[0002] Thermal fuses, also known as temperature fuses, are widely used in thermal protection of various circuit components.

[0003] Specifically, thermal fuse protection for circuit components includes steps S110 to S130. Step S110: The thermal fuse is connected in series with the circuit and mounted on the corresponding circuit component. The thermal fuse senses the heat of the circuit component. Step S120: In response to the heat of the circuit component reaching the thermal fuse's operating temperature, the thermal fuse activates, disconnecting the circuit. Thus, steps S110 and S120 prevent overheating of the circuit component, thereby preventing damage or ignition from overheating.

[0004] In the prior art, a thermal fuse includes an insulating housing, a first outer metal cover, a second outer metal cover, multiple thermally fusible conductors, and a flux. The first outer metal cover is mounted on the upper end of the insulating housing, while the second outer metal cover is mounted on the lower end of the insulating housing. Multiple thermally fusible conductors are disposed within the insulating housing, each electrically connected to the first and second outer metal covers. A flux is filled within the housing assembly and surrounds the thermally fusible conductors.

[0005] The first and second outer metal covers are often electrically connected to corresponding circuit components using bolts. To this end, they are typically provided with threaded holes for threaded connection with the bolts. To ensure sufficient connection strength, the threaded holes must be long enough to form a secure connection with the bolts. Therefore, the first and second outer metal covers must be sufficiently thick to allow the threaded holes to be long enough, which hinders the design of thin and lightweight first and second outer metal covers.

[0006] Therefore, how to ensure that the threaded connection has sufficient connection strength while facilitating the lightweight and thinning of the first outer metal cover and the second outer metal cover is a technical problem that those skilled in the art urgently need to solve. Utility Model Content

[0007] In view of this, in order to solve the above technical problems, the present application provides a thermal fuse housing assembly and a thermal fuse.

[0008] In order to solve the above technical problems, one of the technical solutions adopted in this application is to provide a shell assembly of a thermal fuse, which includes:

[0009] Insulating housing;

[0010] The first electrode assembly includes a first outer metal cover and a first conductive mounting post; the first outer metal cover is disposed on the upper end of the insulating housing, the first conductive mounting post protrudes from the first outer metal cover and is integrally connected to the first outer metal cover; the first conductive mounting post is provided with a first threaded connection structure, the first threaded connection structure being used for threaded connection with the circuit component;

[0011] And a second electrode assembly, including a second outer metal cover and a second conductive mounting post; the second outer metal cover is covered on the lower end of the insulating shell, and the second conductive mounting post is protruded from the second outer metal cover and is integrally connected to the second outer metal cover; the second conductive mounting post is provided with a second threaded connection structure, and the second threaded connection structure is used for threaded connection with the circuit device.

[0012] In order to solve the above technical problems, another technical solution adopted by the present application is to provide a thermal fuse, which includes:

[0013] A housing assembly, the housing assembly being the aforementioned housing assembly;

[0014] A plurality of heat-melting conductors are disposed in the insulating housing, and each heat-melting conductor is electrically connected to the first outer metal cover and the second outer metal cover respectively;

[0015] and a flux, which is filled in the housing component and wraps around the outer periphery of the hot-melt conductor.

[0016] Beneficial effects: Through the above-mentioned manner, the thermal fuse of the present application has at least the following beneficial effects in the first and second aspects. On the one hand, the first conductive mounting post is protrudingly provided on the first outer metal cover and is integrally connected to the first outer metal cover, which is conducive to the lightweight and thinning setting of the first outer metal cover, and the threaded connection formed by the first threaded connection structure provided on the first conductive mounting post and the corresponding circuit device can have sufficient connection strength. On the second hand, the second conductive mounting post is protrudingly provided on the second outer metal cover and is integrally connected to the second outer metal cover, which is conducive to the lightweight and thinning setting of the second outer metal cover, and the threaded connection formed by the second threaded connection structure provided on the second conductive mounting post and the corresponding circuit device can have sufficient connection strength. Therefore, the present application can ensure that the threaded connection has sufficient connection strength while facilitating the lightweight and thinning setting of the first outer metal cover and the second outer metal cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 3D schematic diagram of the thermal fuse of Example 1 of the present application;

[0018] Figure 2 is a schematic top view of the thermal fuse of Example 1 of the present application;

[0019] Figure 3 It is along Figure 2 Schematic diagram of the cross section obtained by cutting along the median cutting line PP;

[0020] Figure 4 yes Figure 3 A magnified schematic diagram of area A in the middle. Figure 4 The flux is not shown;

[0021] Figure 5 yes Figure 4 A schematic diagram after the flux is shown in FIG.

[0022] Figure 6 yes Figure 5 Schematic diagram of the hot-melt conductor after it has melted;

[0023] Figure 7 is an explosion diagram of the thermal fuse of Example 1 of the present application;

[0024] Figure 8 1 is a schematic diagram of the insulating housing of the thermal fuse of Example 1 of the present application, which shows the side of the insulating housing facing the first outer metal cover;

[0025] Figure 9 1 is a schematic diagram of the insulating housing of the thermal fuse of Example 1 of the present application, which shows the side of the insulating housing facing the second outer metal cover;

[0026] Figure 10 1 is a schematic diagram of the first inner metal cover of the thermal fuse of Example 1 of the present application, which shows the side of the first inner metal cover facing the second outer metal cover;

[0027] Figure 11 yes Figure 3 Enlarged schematic diagram of middle area B;

[0028] Figure 12 2. It is a schematic diagram of the combination of the first outer metal cover and the first conductive mounting member of the thermal fuse of Example 1 of the present application;

[0029] Figure 13 is a top view of the remaining structure of the thermal fuse after removing the first outer metal cover and the first conductive mounting member of Example 1 of the present application;

[0030] Figure 14 yes Figure 13 Schematic diagram of the cross section obtained by cutting along the cutting line EE;

[0031] Figure 15 yes Figure 14 Enlarged schematic diagram of middle area C;

[0032] Figure 161 is a schematic diagram of the first inner metal cover of the thermal fuse of Example 1 of the present application, which shows the side of the first inner metal cover facing the insulating housing;

[0033] Figure 17 is a schematic diagram of the three-dimensional structure of the thermal fuse of Example 3 of the present application;

[0034] Figure 18 is a schematic top view of the thermal fuse of Example 3 of the present application;

[0035] Figure 19 yes Figure 18 Schematic diagram of the cross section obtained by cutting along the cutting line FF;

[0036] Figure 20 yes Figure 19 A magnified schematic diagram of the middle region D;

[0037] Figure 21 is an explosion diagram of the thermal fuse of Example 3 of the present application;

[0038] Figure 22 1 is a schematic diagram of the insulating housing of the thermal fuse of Example 3 of the present application, which shows the side of the insulating housing facing the first outer metal cover;

[0039] Figure 23 It is a schematic diagram of the three-dimensional structure of the thermal fuse of Example 4 of the present application.

[0040] Description of reference numerals:

[0041] Thermal fuses 10a, 10b, 10c; housing assembly 11; insulating housing 100; barrel 110; partition plate 120; sub-plate area 121; partition rib 130; adapter 140; first adapter 140a; second adapter 140b; annular protrusion 141b; internal protrusion 142b; first accommodating groove 101; communicating hole 102; intercepting hole 1021; flow hole 1022; second accommodating groove 103; first screw hole 104; first electrode assembly 200; second electrode assembly 300; thermal fuse conductor 12; disconnect body 12-1; flux 13; plug 14; first screw 15;

[0042] First cover electrode 210; first inner metal cover 211; first outer metal cover 212; first conductive mounting members 220a, 220b, 220c; first sandwich-shaped cavity 201;

[0043] Second cover electrode 310; second inner metal cover 311; second outer metal cover 312; second conductive mounting members 320a, 320b, 320c; second sandwich-shaped cavity 301;

[0044] Fixing hole 21; pouring hole 22; reserved gap 23; connecting hole 24; connecting groove 25; matching protrusion 26; outer edge portion 31; groove portion 32; sleeve groove portion 33; plate body portion 34; first limiting hole 35; sheet-like connector 41; second limiting hole 42; second conductive mounting post 51; second threaded connection structure 52; first conductive mounting post 61; mounting groove 62; first threaded connection structure 63. DETAILED DESCRIPTION

[0045] To enable those skilled in the art to better understand the technical solutions of this application, the present application is further described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of this application.

[0046] In addition, all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside...) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In conventional technology, thermal fuses operate by melting their internal heat-sensitive conductors, forming a pair of disconnecting elements. Heat-sensitive conductors are typically made of fusible alloys, which are sensitive to temperature changes but not to current. However, if the current applied to a heat-sensitive conductor significantly exceeds its rated operating current, it will melt.

[0048] To improve the reliability of thermal fuses under high operating current conditions, patent document CN101859665A (published on October 13, 2010) discloses a high-ampere-capacity alloy-type thermal fuse. This fuse uses a low-melting-point alloy wire as a thermally fusible conductor and connects multiple low-melting-point alloy wires between two metal electrodes to divert the current flowing between the two metal electrodes. However, the disconnected bodies formed by the melting of different low-melting-point alloy wires do not solidify immediately, but remain molten for a period of time. As a result, the disconnected bodies formed by the melting of different low-melting-point alloy wires tend to grow larger due to aggregation, causing the enlarged disconnected bodies between the two metal electrodes to come into contact again, causing the two metal electrodes to connect again.

[0049] Therefore, how to increase the rated operating current of the thermal fuse while avoiding or reducing the risk of the melted thermal fuse conductor connecting the two electrodes again is a technical problem that needs to be solved urgently by those skilled in the art.

[0050] It should be noted that, hereinafter, the inner side of the first outer metal cover 212 is the side of the first outer metal cover 212 facing the inside of the insulating housing 100, and the outer side of the first outer metal cover 212 is the side of the first outer metal cover 212 facing away from the insulating housing 100. hereinafter, the inner side of the second outer metal cover 312 is the side of the second outer metal cover 312 facing the inside of the insulating housing 100, and the outer side of the second outer metal cover 312 is the side of the second outer metal cover 312 facing away from the insulating housing 100.

[0051] Example 1

[0052] See also Figure 1-Figure 5 As shown, the thermal fuse 10a of the first embodiment of the present application includes a housing assembly 11, a plurality of thermally fused conductors 12, and a flux 13. The housing assembly 11 includes an insulating shell 100, a first electrode assembly 200, and a second electrode assembly 300.

[0053] The first electrode assembly 200 includes a first cover electrode 210 and a first conductive mounting member 220a. The first cover electrode 210 is disposed on the upper end of the insulating housing 100 to enclose a first sandwich-shaped cavity 201 with the upper end of the insulating housing 100. The first conductive mounting member 220a is disposed outside the first cover electrode 210 for mounting on a circuit component.

[0054] The second electrode assembly 300 includes a second cover electrode 310 and a second conductive mounting member 320a. The second cover electrode 310 is disposed on the lower end of the insulating housing 100 to enclose a second sandwich-shaped cavity 301 with the lower end of the insulating housing 100. The second conductive mounting member 320a is disposed on the second cover electrode 310 for mounting on a circuit component.

[0055] Among them, such as Figure 4 As shown, the insulating housing 100 is provided with a plurality of independent communication holes 102, each of which is connected to the first sandwich cavity 201 and the second sandwich cavity 301. Figure 4 See Figure 5 At least two of the plurality of communication holes 102 are formed as intercepting holes 1021, and the plurality of hot-melt conductors 12 are provided corresponding to the plurality of intercepting holes 1021. Each hot-melt conductor 12 is provided through a corresponding intercepting hole 1021, so that each hot-melt conductor 12 is electrically connected to the first cover electrode 210 and the second cover electrode 310 respectively. Figure 4 and Figure 5 See Figure 6After melting, the hot-melt conductor 12 forms a pair of disconnected bodies 12-1. The retaining hole 1021 accommodates the opposing ends of the corresponding pair of disconnected bodies 12-1. A reserved gap 23 is formed between the hot-melt conductor 12 and the sidewalls of the retaining hole 1021. The flux 13 fills the first interlayer cavity 201, the second interlayer cavity 301, and the reserved gap 23.

[0056] Through the above-mentioned manner, the thermal fuse 10a of the present application has at least the following first and second beneficial effects.

[0057] First, combining Figure 3 See Figure 4 and Figure 5 Multiple thermal fuse conductors 12 are used to divide the current between the first cover electrode 210 and the second cover electrode 310. This allows the current divided by each thermal fuse conductor 12 to be much smaller than the total current between the first cover electrode 210 and the second cover electrode 310. This allows a greater total current to flow between the first cover electrode 210 and the second cover electrode 310. Therefore, the rated operating current of the thermal fuse 10a can be increased.

[0058] Second, combining Figure 4-Figure 5 See Figure 6 After each hot-melt conductor 12 is melted, it forms a pair of disconnected bodies 12-1. Although the two opposing ends of the same pair of disconnected bodies 12-1 are separated from each other by the action of the flux 13, they ultimately remain disconnected and retained within the retaining hole 1021. Thus, the retaining hole 1021 can restrict the pair of disconnected bodies 12-1 after the corresponding hot-melt conductor 12 is melted, thereby preventing or reducing the accumulation of disconnected bodies 12-1 formed after different hot-melt conductors 12 are melted, and further preventing or reducing the possibility of the melted hot-melt conductors 12 connecting the two electrodes again.

[0059] In summary, the thermal fuse 10a of the present application not only improves the rated operating current of the thermal fuse 10a but also avoids or reduces the possibility of the melted thermal fuse conductor 12 being connected to the two electrodes again, and is easy to assemble.

[0060] It should be noted that a circuit component is a device that can be used to form a circuit. A circuit component can be a power supply component or a power-consuming component. The first conductive mounting member 220a and the second conductive mounting member 320a of the same thermal fuse 10a can be mounted on the same circuit component or on different circuit components.

[0061] Optionally, the material of the insulating housing 100 may be ceramic, but is not limited thereto.

[0062] Further, combined with Figure 3 See Figure 4The first cover electrode 210 includes a first inner metal cover 211 and a first outer metal cover 212 , and the second cover electrode 310 includes a second inner metal cover 311 and a second outer metal cover 312 .

[0063] The first inner metal cover 211 is covered on the upper end of the insulating housing 100 to enclose the first sandwich cavity 201. The first outer metal cover 212 is covered on the first inner metal cover 211. The first conductive mounting member 220a is provided on the first outer metal cover 212.

[0064] The second inner metal cover 311 is covered on the lower end of the insulating housing 100 to enclose the second sandwich cavity 301. The second outer metal cover 312 is covered on the second inner metal cover 311. The second conductive mounting member 320a is disposed on the second outer metal cover 312.

[0065] Among them, such as Figure 4 As shown, the first inner metal cover 211 and the second inner metal cover 311 are each provided with a plurality of fixing holes 21 corresponding to the plurality of intercepting holes 1021. One end of the hot-melt conductor 12 is connected to the corresponding fixing hole 21 in the first inner metal cover 211, and the other end of the hot-melt conductor 12 is connected to the corresponding fixing hole 21 in the second inner metal cover 311.

[0066] In the above manner, when the first inner metal cover 211 and the second inner metal cover 311 have been covered on the insulating shell 100, and the first outer metal cover 212 has not yet been covered on the first inner metal cover 211, and the second outer metal cover 312 has not yet been covered on the second inner metal cover 311, the hot-melt conductor 12 can be quickly assembled by passing through the fixing hole 21 of the first inner metal cover 211, the retaining hole 1021 of the insulating shell 100, and the fixing hole 21 of the second inner metal cover 311.

[0067] Optionally, one end of the thermally fusible conductor 12 is welded to the first inner metal cover 211, and the other end of the thermally fusible conductor 12 is welded to the second inner metal cover 311, but the present invention is not limited thereto. Optionally, the first outer metal cover 212 is integrally formed with the first conductive mounting member 220a, and the second outer metal cover 312 is integrally formed with the second conductive mounting member 320a.

[0068] Alternatively, the thermally fusible conductor 12 may be a fusible alloy. In one example, the fusible alloy may include, but is not limited to, multiple elements selected from the group consisting of In, Sn, and Bi. Alternatively, the plurality of connecting holes 102 between the first interlayer cavity 201 and the second interlayer cavity 301 may be arranged in a honeycomb pattern, but is not limited thereto.

[0069] Alternatively, in other examples, the first inner metal cover 211 and the second inner metal cover 311 may not be provided. In this case, the first outer metal cover 212 is provided on the upper end of the insulating housing 100 to enclose the first sandwich-shaped cavity 201 with the upper end of the insulating housing 100. The second outer metal cover 312 is provided on the lower end of the insulating housing 100 to enclose the second sandwich-shaped cavity 301 with the lower end of the insulating housing 100. The hot-melt conductor 12 is electrically connected to the first outer metal cover 212 and the second outer metal cover 312, respectively.

[0070] Further, combined with Figure 3-Figure 5 See Figure 7-10 As shown, at least one of the plurality of communication holes 102 is formed as a circulation hole 1022 , and a plurality of pouring holes 22 are provided on the first inner metal cover 211 and / or the second inner metal cover 311 corresponding to the plurality of circulation holes 1022 .

[0071] The pouring holes 22 on the first inner metal cover 211 are used to pour the flux 13 into the first sandwich cavity 201. The pouring holes 22 on the second inner metal cover 311 are used to pour the flux 13 into the second sandwich cavity 301. The circulation holes 1022 are used to allow the flux 13 to flow between the first sandwich cavity 201 and the second sandwich cavity 301 during pouring.

[0072] Through the above-mentioned method, when the flux 13 is heated, the flux 13 can be conveniently poured using the following first pouring method or the second pouring method.

[0073] In the first pouring method, after the first inner metal cover 211 and the second inner metal cover 311 have been installed on the insulating housing 100, the first outer metal cover 212 has been installed on the first inner metal cover 211, and the second outer metal cover 312 has not yet been installed on the second inner metal cover 311, and the hot-melt conductor 12 has been inserted into the fixing hole 21 of the first inner metal cover 211, the retaining hole 1021 of the insulating housing 100, and the fixing hole 21 of the second inner metal cover 311, the flux 13 enters the second interlayer cavity 301 through the pouring hole 22 in the second inner metal cover 311. If the first interlayer cavity 201 is not fully filled, the flux 13 that has entered the second interlayer cavity 301 enters the first interlayer cavity 201 through the flow hole 1022.

[0074] In the second pouring method, after the first inner metal cover 211 and the second inner metal cover 311 have been installed on the insulating housing 100, and the second outer metal cover 312 has been installed on the second inner metal cover 311, but the first outer metal cover 212 has not yet been installed on the first inner metal cover 211, and the hot-melt conductor 12 has passed through the fixing hole 21 of the first inner metal cover 211, the retaining hole 1021 of the insulating housing 100, and the fixing hole 21 of the second inner metal cover 311, the flux 13 enters the first interlayer cavity 201 through the pouring hole 22 on the first inner metal cover 211. When the second interlayer cavity 301 is not fully filled, the flux 13 that has entered the first interlayer cavity 201 enters the second interlayer cavity 301 through the flow hole 1022.

[0075] In this manner, the first or second pouring method can be used to quickly and easily coat the multiple hot-melt conductors 12 assembled in the housing assembly 11 with the flux 13. Optionally, the softening point of the flux 13 is generally greater than or equal to 50 degrees Celsius and less than or equal to 100 degrees Celsius. The flux 13 may include, but is not limited to, rosin.

[0076] Further, combined with Figure 3-Figure 5 See Figure 8-Figure 9 The insulating housing 100 includes a cylinder 110 , a partition plate 120 and a partition rib 130 .

[0077] The partition plate 120 is disposed within the cylindrical body 110 and divides the interior space of the cylindrical body 110 into a first accommodating groove 101 and a second accommodating groove 103. The partition plate 120 includes multiple sub-plate areas 121 and multiple rib areas (not shown). Each rib area has a rib 130 protruding from both sides. The rib areas are intersectingly arranged, so that the ribs 130 separate the multiple sub-plate areas 121.

[0078] Among them, a first sandwich cavity 201 is formed between each sub-plate area 121 and the first inner metal cover 211 of the corresponding area. A second sandwich cavity 301 is formed between each sub-plate area 121 and the second inner metal cover 311 of the corresponding area. The separation ribs 130 on the upper side of the partition plate 120 separate the different first sandwich cavities 201, and the separation ribs 130 on the lower side of the partition plate 120 separate the different second sandwich cavities 301. Each sub-plate area 121 is provided with a plurality of connecting holes 102. At least two of the multiple connecting holes 102 of each sub-plate area 121 are formed as retention holes 1021. At least one of the multiple connecting holes 102 of each sub-plate area 121 is formed as a flow hole 1022.

[0079] Through the above-mentioned manner, the thermal fuse 10a of the present application has at least the following beneficial effects of the first and second aspects.

[0080] First, the separator ribs 130 function as reinforcement ribs, enhancing the mechanical strength of the separator plate 120. Second, the separator ribs 130 on the upper side of the separator plate 120 separate different first interlayer cavities 201, while the separator ribs 130 on the lower side of the separator plate 120 separate different second interlayer cavities 301. This prevents the separation of the disconnected portions 12-1 formed after the hot-melt conductor 12 is melted. Disconnected portions 12-1 located in different first interlayer cavities 201 and in different second interlayer cavities 301 from clustering, thereby preventing or minimizing the possibility of the melted hot-melt conductor 12 reconnecting the two electrodes.

[0081] Optionally, combined Figure 3-Figure 5 , see Figure 8-Figure 9 Because the first interlayer cavity 201 corresponding to each sub-board area 121 connects to all the connecting holes 102 within that sub-board area 121, and the second interlayer cavity 301 corresponding to each sub-board area 121 connects to all the connecting holes 102 within that sub-board area 121, the number of retaining holes 1021 in the multiple connecting holes 102 in each sub-board area 121 can be greater than the number of flow holes 1022. Thus, when pouring the flux 13, the poured flux 13 can enclose the same number of hot-melt conductors 12 as the number of retaining holes 1021, thanks to the smaller number of flow holes 1022 than the retaining holes 1021.

[0082] Combine Figure 3-Figure 5 , see Figures 8-10 It should be understood that when pouring holes 22 are provided on the inner metal cover (211, 311) corresponding to the flow holes 1022, pouring holes 22 corresponding to the flow holes 1022 in the corresponding sub-plate area 121 are provided in the area corresponding to each sub-plate area 121 on the inner metal cover (211, 311). In this way, when the poured flux 13 is wrapped around the same number of hot-melt conductors 12 as the number of retaining holes 1021 through the flow holes 1022 having a smaller number than the retaining holes 1021, that is, through the pouring holes 22 having a smaller number than the number of hot-melt conductors 12, the poured flux 13 can wrap around a larger number of hot-melt conductors 12 than the number of pouring holes 22.

[0083] Optionally, combined Figure 3 、 Figures 8-10 See Figure 11 The intersection of the partition ribs 130 on the same side of the partition plate 120 is marked as an intersection area (not marked in the figure). The intersection area is provided with a transition body 140.

[0084] The first inner metal cover 211 and the second inner metal cover 311 are both provided with connection holes 24 corresponding to the adapter protrusion 140 , and the first outer metal cover 212 and the second outer metal cover 312 are both provided with connection grooves 25 corresponding to the adapter protrusion 140 .

[0085] On the side of the partition plate 120 facing the first outer metal cover 212, the connection holes 24 of the first inner metal cover 211 and the connection slots 25 of the first outer metal cover 212 are both connected to the adapter body 140 and engage with the adapter body 140 along the circumference of the adapter body 140. On the side of the partition plate 120 facing the second outer metal cover 312, the connection holes 24 of the second inner metal cover 311 and the connection slots 25 of the second outer metal cover 312 are both connected to the adapter body 140 and engage with the adapter body 140 along the circumference of the adapter body 140.

[0086] It should be noted that “engaging with the adapter body 140 along the circumferential direction of the adapter body 140 ” means being connected to the adapter body 140 in a manner that the adapter body 140 cannot rotate relative to the adapter body 140 along the circumferential direction of the adapter body 140 .

[0087] Optionally, the adapter body 140 has a non-circular cross-section, and the connecting groove 25 and the connecting hole 24 are adapted to the shape of the area of ​​the adapter body 140 having the non-circular cross-section, so that when the connecting groove 25 is connected to the adapter body 140, the connecting groove 25 can be engaged with the adapter body 140 along the circumference of the adapter body 140.

[0088] For example and not limitation, the adapter body 140 can be engaged with the adapter body 140 along its circumference, the adapter body 140 can have a square cross-section, the connecting hole 24 can be a square hole, and the connecting groove 25 can be a square groove, but is not limited thereto.

[0089] Through the above-described method, the engaging engagement of the connecting slot 25 with the adapter body 140 prevents the first inner metal cover 211, the second inner metal cover 311, the first outer metal cover 212, and the second outer metal cover 312 from rotating relative to the insulating housing 100, thereby creating a locking effect. This improves the stability of heat conduction along the first and second heat conduction paths. The first heat conduction path sequentially conducts heat from the first conductive mounting member 220a to the first outer metal cover 212, the first inner metal cover 211, and the hot-melt conductor 12. The second heat conduction path sequentially conducts heat from the second conductive mounting member 320a to the second outer metal cover 312, the second inner metal cover 311, and the hot-melt conductor 12.

[0090] Alternatively, in a first alternative embodiment, the partition plate 120 may not be provided with the partition ribs 130. In this case, the upper and lower surfaces of the partition plate 120 are provided with adapter bodies 140, respectively. In a second alternative embodiment, the partition plate 120 may be provided with the partition ribs 130, but the adapter bodies 140 may not be provided at the intersection. In this case, the adapter bodies 140 may be provided at other locations of the partition plate 120 except at the intersection. For ease of description, the following description will be based on an example in which the partition plate 120 is provided with the partition ribs 130 and the adapter bodies 140 are provided at the intersection.

[0091] Further, combined with Figure 3 See Figure 12 The inner sides of the first outer metal cover 212 and the second outer metal cover 312 are both provided with mating protrusions 26 , and the connecting grooves 25 are provided at the top of the mating protrusions 26 in the protruding direction.

[0092] Combine Figure 7-10 See Figure 13-16 The first inner metal cover 211 and the second inner metal cover 311 each include an outer edge portion 31 and a groove portion 32. The periphery of the opening of the groove portion 32 is connected to the outer edge portion 31, and the outer edge portion 31 protrudes toward the periphery of the opening of the groove portion 32. The bottom wall of the groove portion 32 includes a sleeve groove portion 33 and a plate body portion 34. The opening of the sleeve groove portion 33 faces away from the opening of the groove portion 32. The sleeve groove portion 33 protrudes toward the side of the plate body portion 34 facing the opening of the groove portion 32. The fixing hole 21 and the pouring hole 22 are provided in the plate body portion 34.

[0093] The outer edge 31 of the first inner metal cover 211 is supported on the end of the insulating housing 100 where the first receiving groove 101 is provided. The groove-shaped portion 32 of the first inner metal cover 211 is embedded in the first receiving groove 101. The separating rib 130 of the partition plate 120, which faces the first inner metal cover 211, is received in and supports the sleeve groove 33 of the first inner metal cover 211, thereby limiting the rotation of the first inner metal cover 211 relative to the insulating housing 100. The plate portion 34 of the first inner metal cover 211 is spaced apart from the corresponding sub-plate area 121 to form the first sandwich cavity 201.

[0094] The outer edge 31 of the second inner metal cover 311 is supported on the end of the insulating housing 100 where the second receiving groove 103 is provided. The groove-shaped portion 32 of the second inner metal cover 311 is embedded in the second receiving groove 103. The dividing rib 130 of the partition plate 120 facing the second inner metal cover 311 is received in and supports the sleeve groove 33 of the second inner metal cover 311, thereby limiting the rotation of the second inner metal cover 311 relative to the insulating housing 100. The plate portion 34 of the second inner metal cover 311 is spaced apart from the corresponding sub-plate area 121 to form a second sandwich-shaped cavity 301.

[0095] Through the above-mentioned manner, the thermal fuse 10a of the present application has at least the following beneficial effects of the first and second aspects.

[0096] First, at least two supporting elements are provided between the first inner metal cover 211 or the second inner metal cover 311 and the insulating housing 100. The first supporting element is provided between the outer edge 31 and the end of the insulating housing 100, and the second supporting element is provided between the sleeve groove 33 and the separating rib 130. This enhances the mechanical strength of the connection structure between the first inner metal cover 211 or the second inner metal cover 311 and the insulating housing 100.

[0097] Secondly, in addition to providing support and cooperation between the sleeve groove portion 33 and the corresponding separation rib 130, the sleeve groove portion 33 also engages with the corresponding separation rib 130 to prevent either the first inner metal cover 211 or the second inner metal cover 311 from rotating relative to the insulating housing 100. This prevents deformation and damage to the thermal fuse conductor 12 caused by rotation of the inner metal covers (211, 311) relative to the insulating housing 100, thereby improving the torsional strength of the thermal fuse 10a.

[0098] Optionally, see Figure 13-16 The outer edge 31 of the first inner metal cover 211 is welded to the barrel 110, and the outer edge 31 of the second inner metal cover 311 is welded to the barrel 110, but the present invention is not limited thereto. Alternatively, the periphery of the first outer metal cover 212 is welded to the barrel 110, and the periphery of the second outer metal cover 312 is welded to the barrel 110. In this manner, the weld seam formed by the welding connection can improve the efficiency of heat transfer from the circuit components outside the thermal fuse 10a to the heat-melting alloy inside the thermal fuse 10a.

[0099] Alternatively, as Figure 8 and Figure 9 As shown, the remaining portions of the plurality of separation ribs 130 on the same side of the separation plate 120 except for the intersection area are formed in a radial shape extending from the intersection area to the side wall of the cylinder 110 .

[0100] Optionally, combined Figure 7-10 , see Figure 13-15 As shown, the partition rib 130 protruding toward the first inner metal cover 211 is referred to as the first partition rib 130, and the partition rib 130 protruding toward the second inner metal cover 311 is referred to as the second partition rib 130. At least some of the first and second partition ribs 130 are provided with first screw holes 104.

[0101] In this embodiment, the first screw holes 104 on the separation ribs 130 are preferably symmetrically distributed on both sides of the intersection area, such as Figure 8 、 Figure 9As shown. Among all the dividing ribs 130 on the same side of the dividing plate 120, those with first screw holes 104 and those without are alternately distributed around the intersection. The sleeve groove portion 33 is provided with a first limiting hole 35. The housing assembly 11 includes a plurality of first screws 15, each of which passes through the first limiting hole 35 and connects to the corresponding first screw hole 104.

[0102] Optionally, combined Figure 7-10 , see Figure 13-15 As shown, multiple sleeve grooves 33 on the same side of the partition plate 130 are arranged around the intersection, and each sleeve groove 33 extends from the intersection toward the side wall of the cylinder 110, so that the multiple sleeve grooves 33 are combined into a radial pattern. Each sleeve groove 33 is provided with a first limiting hole 35. When the inner metal cover (211, 311) is covered on the insulating housing 100 so that the partition rib 130 provided with the first screw hole 104 is accommodated in the sleeve groove 33, the first screw hole 104 is aligned with the first limiting hole 35, so that the first screw 15 can pass through the first limiting hole 35 and connect with the corresponding first screw hole 104.

[0103] In the above manner, since each sleeve groove portion 33 is provided with a first limiting hole 35, when the inner metal cover (211, 311) is covered on the insulating housing 100, the first limiting hole 35 of any sleeve groove portion 33 can be selected to align with a first screw hole 104. In this way, as long as the separating rib 130 provided with the first screw hole 104 is accommodated in the sleeve groove portion 33, the first screw hole 104 can be aligned with the first limiting hole 35 without further adjustment, and the reliability of the electrical connection can be enhanced.

[0104] Optionally, combined Figure 7 See Figure 10 As shown, the housing assembly 11 includes a plug 14 that detachably seals the pouring hole 22. When the plug 14 is removed from the pouring hole 22, the flux 13 can be poured through the pouring hole 22. After the flux 13 is poured, the plug 14 can be used to seal the pouring hole 22 to prevent leakage of the poured flux 13. Alternatively, the plug 14 can be made of an insulating material. For example, the plug 14 can be made of rubber, but is not limited to this material.

[0105] like Figure 12 As shown, the first conductive mounting member 220a and the second conductive mounting member 320a can both be a first structure, the first structure including a sheet-like connector 41 and a second limiting hole 42, the sheet-like connector 41 extends from the corresponding outer metal cover (212, 312) to the outside of the outer metal cover (212, 312), and the second limiting hole 42 is set on the sheet-like connector 41.

[0106] Optionally, the sheet-shaped connector 41 may be installed in the circuit device by a fastener (not shown) passing through the second limiting hole 42 , but the present invention is not limited thereto.

[0107] Alternatively, the rated voltage connected between the first electrode assembly 200 and the second electrode assembly 300 is denoted as Ur, the electrical clearance between the first inner metal cover 211 and the second inner metal cover 311 is denoted as L1, and the creepage distance between the first inner metal cover 211 and the second inner metal cover 311 is denoted as L2. To prevent the first inner metal cover 211 and the second inner metal cover 311 from reconnecting after the hot-melt conductor 12 is disconnected, optional examples 1 to 6 may be as shown in Table 1 below.

[0108] Table 1: Data summary of each optional example

[0109]

[0110] As shown in Table 1 above, in optional example 1, 0V<Ur≤32V, L1≥0.2mm, and L2≥0.53mm. Data of other optional examples can be found in Table 1 above and will not be described in detail.

[0111] Example 2

[0112] See Figures 17-22 The housing assembly 11 of the thermal fuse 10 b of the second embodiment includes an insulating shell 100 , a first electrode assembly 200 and a second electrode assembly 300 .

[0113] The first electrode assembly 200 includes a first outer metal cover 212 and a first conductive mounting post 61. The first outer metal cover 212 is disposed on the upper end of the insulating housing 100. The first conductive mounting post 61 protrudes from the first outer metal cover 212 and is integrally connected to the first outer metal cover 212. The first conductive mounting post 61 is provided with a first threaded connection structure 63 for threaded connection with a circuit component.

[0114] The second electrode assembly 300 includes a second outer metal cover 312 and a second conductive mounting post 51. The second outer metal cover 312 is disposed on the lower end of the insulating housing 100. The second conductive mounting post 51 protrudes from the second outer metal cover 312 and is integrally connected to the second outer metal cover 312. The second conductive mounting post 51 is provided with a second threaded connection structure 52 for threaded connection with a circuit component.

[0115] Through the above-described method, the thermal fuse 10b of the present application has at least the following first and second beneficial effects. First, the first conductive mounting post 61 protrudes from the first outer metal cover 212 and is integrally connected to the first outer metal cover 212, which facilitates the lightweight and thinning design of the first outer metal cover 212 and ensures that the threaded connection formed between the first threaded connection structure 63 provided on the first conductive mounting post 61 and the corresponding circuit component has sufficient connection strength. Second, the second conductive mounting post 51 protrudes from the second outer metal cover 312 and is integrally connected to the second outer metal cover 312, which facilitates the lightweight and thinning design of the second outer metal cover 312 and ensures that the threaded connection formed between the second threaded connection structure 52 provided on the second conductive mounting post 51 and the corresponding circuit component has sufficient connection strength. Therefore, the present application can ensure that the threaded connection has sufficient connection strength while facilitating the lightweight and thinning design of the first and second outer metal covers 212 and 312.

[0116] Example 3

[0117] contrast Figure 1-Figure 3 、 Figure 7 and Figure 8 , see Figures 17-22 The thermal fuse 10b of Example 3 is a modified thermal fuse 10a of Example 1. The similarities between the thermal fuse 10b of Example 3 and the thermal fuse 10a of Example 1 will not be repeated. The differences between the thermal fuse 10b of Example 3 and the thermal fuse 10a of Example 1 are as follows.

[0118] See Figures 17-22 As shown, the first conductive mounting member 220b is in the third structure, and the second conductive mounting member 320b is in the second structure.

[0119] Combine Figure 17-Figure 19 , see Figure 20 As shown, the third structure includes a first conductive mounting column 61, and the second structure includes a second conductive mounting column 51. The parts of the first conductive mounting column 61 and the second conductive mounting column 51 in Example 3 that are the same as the first conductive mounting column 61 and the second conductive mounting column 51 in Example 2 can be referred to the description in Example 2 and will not be repeated here.

[0120] The first conductive mounting post 61 may be disposed to protrude toward the inner side or the outer side of the first outer metal cover 212 , and the second conductive mounting post 51 may be disposed to protrude toward the inner side or the outer side of the second outer metal cover 312 .

[0121] Combine Figure 17-Figure 19 , see Figure 20As shown, the following description will be made by taking the example that the first conductive mounting post 61 is protruded toward the inner side of the first outer metal cover 212 and the second conductive mounting post 51 is protruded toward the outer side of the second outer metal cover 312 .

[0122] The first conductive mounting post 61 protrudes toward the inside of the first outer metal cover 212. The mating protrusion 26 on the inside of the first outer metal cover 212 is located at the top of the protruding portion of the first conductive mounting post 61. The mounting slot 62 extends through the first outer metal cover 212 and into the first conductive mounting post 61. The first threaded connection structure 63 is an internal thread provided on the inner sidewall of the mounting slot 62 of the first conductive mounting post 61.

[0123] In this way, the first conductive mounting post 61 is disposed on a side of the corresponding outer metal cover 212 close to the insulating housing 100 , thereby making the housing assembly 11 compact and reducing the volume of the thermal fuse 10 b.

[0124] Combine Figure 17-Figure 19 As shown, the second conductive mounting post 51 is protruding outward from the second outer metal cover 312 , and the second threaded connection structure 52 is an external thread provided on the outer side wall of the second conductive mounting post 51 .

[0125] Combine Figure 17 、 Figure 18 、 Figure 21 See Figure 19 and Figure 20 Furthermore, the adapter 140 on the side of the partition plate 120 facing the second outer metal cover 312 is the first adapter 140a, and the adapter 140 on the side of the partition plate facing the first outer metal cover 212 is the second adapter 140b. Figure 19 As shown, the first adapter 140a is a fixed convex body (not marked in the figure). Figure 22 See Figure 20 The second adapter body 140b includes an annular protrusion 141b and an internal protrusion 142b. Both the annular protrusion 141b and the internal protrusion 142b are disposed on the partition plate 120, with the internal protrusion 142b located inside the annular protrusion 141b. The annular protrusion 141b passes through the connecting hole 24 and engages with the connecting hole 24 along its circumference. The mating protrusion 26 is inserted into the annular protrusion 141b and engages with the annular protrusion 141b along its circumference. The internal protrusion 142b is inserted into the connecting groove 25 and engages with the connecting groove 25 along its circumference. This further improves the torsional strength of the thermal fuse 10a.

[0126] By way of example and not limitation, to achieve a snap fit, the inner and outer rings of the annular projection 141b, the connecting hole 24, the mating projection 26, the inner projection 142b, and the connecting groove 25 may all be non-circular. For example, to achieve a snap fit, the inner and outer rings of the annular projection 141b, the connecting hole 24, the mating projection 26, the inner projection 142b, and the connecting groove 25 may be rectangular, triangular, trapezoidal, or other shapes with angled outer edges.

[0127] Optionally, when the threaded rod of the first conductive mounting post 51 is mounted on the circuit component by threaded connection, the thread model and torque of the threaded connection are shown in Table 2 below.

[0128] Table 2: Parameters of the threaded connection between the threaded rod of the first conductive mounting post 51 and the circuit device in Example 3

[0129] Thread model Torque of threaded connection (unit: Nm) M4 2～3 M5 3～4 M6 5～6 M8 9～11 M10 20～25 M12 35～44

[0130] As shown in Table 2 above, M4 threads can be threaded with a torque of 2 to 3 N.m (not less than 2 N.m and not more than 3 N.m). The corresponding relationship between threads and torques for other types can be found in Table 2 above and will not be repeated here.

[0131] Example 4

[0132] contrast Figure 17 , see Figure 23 The thermal fuse 10c of Example 4 is a modified thermal fuse 10b of Example 3. The similarities between the thermal fuse 10c of Example 4 and the thermal fuse 10b of Example 3 will not be repeated. The differences between the thermal fuse 10c of Example 4 and the thermal fuse 10b of Example 3 are as follows.

[0133] Unlike the thermal fuse 10b of Example 3, in which the first conductive mounting post 61 protrudes toward the inner side of the first outer metal cover 212 and the second conductive mounting post 51 protrudes toward the outer side of the second outer metal cover 312, in Example 4, the first conductive mounting post 61 protrudes toward the outer side of the first outer metal cover 212 and the second conductive mounting post 51 protrudes toward the outer side of the second outer metal cover 312.

[0134] like Figure 23 In the fourth embodiment, the first threaded connection structure 63 is an external thread provided on the outer side wall of the first conductive mounting post 61 . The second threaded connection structure 52 is an external thread provided on the outer side wall of the second conductive mounting post 51 .

[0135] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A housing assembly of a thermal fuse, characterized in that: The housing assembly comprises: Insulating housing; The first electrode assembly includes a first outer metal cover and a first conductive mounting post; the first outer metal cover is disposed on the upper end of the insulating housing; the first conductive mounting post is protruded from the first outer metal cover and is integrally connected to the first outer metal cover; the first conductive mounting post is provided with a first threaded connection structure, the first threaded connection structure being configured to be threadedly connected to a circuit component; And a second electrode assembly, including a second outer metal cover and a second conductive mounting post; the second outer metal cover is covered on the lower end of the insulating shell, and the second conductive mounting post is protruded from the second outer metal cover and is integrally connected to the second outer metal cover; the second conductive mounting post is provided with a second threaded connection structure, and the second threaded connection structure is used for threaded connection with the circuit device.

2. The housing assembly according to claim 1, wherein: The first electrode assembly includes a first inner metal cover, and the second electrode assembly includes a second inner metal cover; The first inner metal cover is disposed on the upper end of the insulating shell to enclose a first sandwich-shaped cavity with the upper end of the insulating shell; the first outer metal cover is disposed on the first inner metal cover; The second inner metal cover is disposed on the lower end of the insulating shell to enclose a second sandwich cavity with the lower end of the insulating shell; the second outer metal cover is disposed on the second inner metal cover; In which, the insulating shell is provided with a plurality of independent connecting holes, each of which connects the first sandwich cavity and the second sandwich cavity; at least two of the connecting holes are formed as intercepting holes; the first inner metal cover and the second inner metal cover are provided with a plurality of fixing holes corresponding to the plurality of intercepting holes; the intercepting holes are used for allowing the corresponding hot-melt conductors to pass through, so that the hot-melt conductors are electrically connected to the fixing holes on the first inner metal cover and the fixing holes on the second inner metal cover respectively.

3. The housing assembly according to claim 2, wherein: At least one of the plurality of communicating holes is formed as a flow hole, and a plurality of pouring holes are provided on the first inner metal cover and / or the second inner metal cover corresponding to the plurality of flow holes; Wherein, the pouring hole on the first inner metal cover is used to pour the flux into the first sandwich cavity; the pouring hole on the second inner metal cover is used to pour the flux into the second sandwich cavity; when pouring the flux, the circulation hole allows the flux to flow between the first sandwich cavity and the second sandwich cavity.

4. The housing assembly according to claim 3, wherein: The insulating shell includes a cylinder and a partition plate, wherein the partition plate is arranged in the cylinder and divides the inner space of the cylinder into a first accommodating groove and a second accommodating groove; Among them, the first inner metal cover is arranged on the first receiving groove to enclose the first sandwich cavity with the first receiving groove; the second inner metal cover is arranged on the second receiving groove to enclose the second sandwich cavity with the second receiving groove; the multiple connecting holes are arranged on the partition plate.

5. The housing assembly according to claim 4, wherein: The partition plate includes a plurality of sub-plate areas and a plurality of partition rib areas; Separation ribs, each of the separation rib areas is provided with a protruding separation rib on both sides; a plurality of the separation rib areas are cross-arranged so that the separation ribs cross-arrange to separate the plurality of sub-board areas; Wherein, each of the sub-plate areas has a first sandwich cavity formed between it and the first inner metal cover of the corresponding area; each of the sub-plate areas has a second sandwich cavity formed between it and the second inner metal cover of the corresponding area; the separation ribs on the upper side of the separation plate separate different first sandwich cavities, and the separation ribs on the lower side of the separation plate separate different second sandwich cavities; each of the sub-plate areas is provided with a plurality of communicating holes; at least two of the plurality of communicating holes in each of the sub-plate areas are formed as retention holes; and at least one of the plurality of communicating holes in each of the sub-plate areas is formed as a flow hole.

6. The housing assembly according to claim 4, wherein: The upper surface of the partition plate and the lower surface of the partition plate are respectively provided with adapter bodies; The first inner metal cover and the second inner metal cover are both provided with connection holes corresponding to the adapter body, and the first outer metal cover and the second outer metal cover are both provided with connection grooves corresponding to the adapter body; Wherein, on the side of the partition plate facing the first outer metal cover, the connecting hole of the first inner metal cover and the connecting groove of the first outer metal cover are both connected to the adapter and engage with the adapter along the circumference of the adapter; on the side of the partition plate facing the second outer metal cover, the connecting hole of the second inner metal cover and the connecting groove of the second outer metal cover are both connected to the adapter and engage with the adapter along the circumference of the adapter.

7. The housing assembly according to claim 6, wherein: The inner sides of the first outer metal cover and the second outer metal cover are both protruded with matching protrusions, and the connecting groove is provided at the top of the protruding direction of the matching protrusions; The first inner metal cover and the second inner metal cover each include an outer edge portion and a groove portion; the bottom wall of the groove portion includes a sleeve groove portion and a plate portion; the fixing hole and the pouring hole are provided in the plate portion; The outer edge of the first inner metal cover is supported on the end of the insulating housing provided with the first accommodating groove, and the groove-shaped portion of the first inner metal cover is embedded in the first accommodating groove; the plate portion of the first inner metal cover is spaced apart from the partition plate to form the first sandwich-shaped cavity; The outer edge of the second inner metal cover is supported on the end of the insulating shell provided with the second accommodating groove, and the groove-shaped portion of the second inner metal cover is embedded in the second accommodating groove; the plate body of the second inner metal cover is arranged relative to the partition plate to form the second sandwich cavity.

8. The housing assembly according to claim 7, wherein: One end of the hot-melt conductor is welded to the first inner metal cover, and the other end of the hot-melt conductor is welded to the second inner metal cover; the outer edge of the first inner metal cover is welded to the cylinder, and the outer edge of the second inner metal cover is welded to the cylinder; the periphery of the first outer metal cover is welded to the cylinder, and the periphery of the second outer metal cover is welded to the cylinder.

9. The housing assembly according to claim 1, wherein: The first / second conductive mounting post is protruded from the corresponding first / second outer metal cover toward the outside of the first / second outer metal cover; the first / second thread structure is an external thread provided on the outer side wall of the first / second conductive mounting post; or, The first / second conductive mounting post is protruding from the corresponding first / second outer metal cover toward the inner side of the first / second outer metal cover; the first / second conductive mounting post is provided with a mounting groove, which passes through the first / second outer metal cover and extends into the first / second conductive mounting post; the first / second threaded connection structure is an internal thread provided on the inner side wall of the corresponding mounting groove.

10. The housing assembly according to claim 7, wherein: The adapter body is a first adapter body or a second adapter body, the first adapter body is a fixed convex body; the second adapter body includes an annular convex body and an internal convex body, and the internal convex body is located on the inner side of the annular convex body; the annular convex body passes through the connecting hole and is engaged with the connecting hole along the circumference of the connecting hole, the mating protrusion is inserted into the annular convex body and is engaged with the annular convex body along the circumference of the annular convex body, and the internal convex body is inserted into the connecting groove and is engaged with the connecting groove along the circumference of the connecting groove.

11. A thermal fuse, characterized in that: The thermal fuse comprises: A housing assembly, wherein the housing assembly is the housing assembly according to any one of claims 1 to 10; a plurality of heat-melting conductors disposed in the insulating housing, and each of the heat-melting conductors is electrically connected to the first outer metal cover and the second outer metal cover; and a flux filled in the housing component and wrapping the outer periphery of the hot-melt conductor.

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