Thermal fuse having stranded-wire leads, and device

Abstract

The present application relates to the technical field of fuses, and in particular to a thermal fuse having stranded-wire leads, and a device. The thermal fuse having stranded-wire leads comprises: a housing and leads, wherein the housing is internally provided with a fuse link, the leads include a first lead and a second lead, and a tail end of the first lead and a tail end of the second lead respectively form an integrated first joint and an integrated second joint. Thus, by conducting processes such as fusion welding and extrusion on stranded wires in each of the first lead and the second lead, the integrated first joint and the integrated second joint having smooth surfaces and no gaps are formed. The first joint and the second joint can be directly welded to the fuse link, thereby solving the technical problem that stranded loose wires under conventional conditions cannot be directly welded to a fuse link, and eliminating the need of a conventional approach of secondary welding by means of external terminals.

Description

Multi-strand pin temperature fuse and device

[0001] Cross Reference to Related Applications

[0002] The present disclosure claims priority to Chinese Patent Application No. CN202421696782.2, filed on July 17, 2024, and entitled “Multi-strand pin temperature fuse and device”, and Chinese Patent Application No. CN202422797921.7, filed on November 15, 2024, and entitled “Multi-strand pin temperature fuse and device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of fuses, and in particular to a multi-strand pin temperature fuse and device. BACKGROUND

[0004] Temperature fuses, also known as thermal fuses, can cut off the circuit to prevent safety accidents by sensing the overheat generated in the abnormal operation of electrical appliances. Currently, most conventional multi-strand pin temperature fuses on the market are connected to external multi-strand leads by welding external terminals, which belongs to the external terminal type. For example, Chinese Patent No. CN207097772U discloses an alloy type temperature fuse connected electrically by a “combined pin”. However, this type of fuse has the following disadvantages:

[0005] 1. External welding requires an additional welding process, which increases production costs and reduces production efficiency. The quality of welding directly affects the function of the product, and excessive heat during welding may cause the internal alloy of the fuse to melt prematurely or the lead to fall off due to poor welding.

[0006] 2. The external welding completion needs to be additionally covered with an insulating covering member such as a heat shrink tube, further increasing the production process and production cost.

[0007] Therefore, there is a need for a temperature fuse that can eliminate the above-mentioned disadvantages and meet the requirements of low cost and fast production.

[0008] It should be noted that the information disclosed in this BACKGROUND section is only intended to increase an understanding of the general context of the present application, and should not be considered as an acknowledgment or any form of suggestion that this information constitutes prior art commonly known by those skilled in the art. SUMMARY

[0009] To solve the technical problems of the above-mentioned conventional multi-strand pin temperature fuses, the present application provides a multi-strand pin temperature fuse, which comprises a shell and a pin, and a fuse core is arranged in the shell.

[0010] The pin comprises a first pin and a second pin, both of which are composed of a plurality of wires, the end of the first pin and the end of the second pin form a first joint and a second joint respectively, the first joint and the second joint extend into the shell and are respectively communicated with the core;

[0011] The first joint and the second joint are integrated joints.

[0012] Further, the first joint is formed by fusion welding of the plurality of wires of the first pin, and the second joint is formed by fusion welding of the plurality of wires of the second pin.

[0013] Further, the first joint and the second joint are one of rectangular, cylindrical, arc-shaped or polygonal.

[0014] Further, the material of the first joint and the second joint is copper or copper alloy.

[0015] Further, when the first joint extends into the shell and is communicated with the core, the other end of the first pin is not in the same straight line as the first joint, and when the second joint extends into the shell and is communicated with the core, the other end of the second pin is not in the same straight line as the second joint.

[0016] Further, the shell comprises a shell body and an upper cover, the shell body is provided with a melting cavity and a first sealing cavity, the core is located in the melting cavity, a first guide hole is opened between the melting cavity and the first sealing cavity, the first joint and the second joint extend into the melting cavity through the first guide hole and are respectively communicated with the core, and the upper cover is connected to the shell body.

[0017] Further, the melting cavity is filled with a fluxing agent.

[0018] Further, the first sealing cavity is filled with a sealing material, the first pin and the second pin are coated with an insulating layer, and when the first joint and the second joint extend into the melting cavity, the sealing material at least wraps part of the insulating layer.

[0019] Further, the multi-wire pin temperature fuse further comprises a second sealing cavity, the second sealing cavity is arranged on the side of the melting cavity away from the first sealing cavity, a second guide hole is arranged between the second sealing cavity and the melting cavity, and the second sealing cavity is filled with a sealing material.

[0020] Further, the multi-strand pin temperature fuse further comprises a communication module, a communication cavity is arranged on the shell, the communication module is located in the communication cavity, and the communication cavity is isolated from the melting cavity and the first sealing cavity and / or the second sealing cavity.

[0021] Further, the application further provides a device comprising the multi-strand pin temperature fuse described in any one of the preceding embodiments.

[0022] Based on the above, the multi-strand pin temperature fuse and the device provided by the application have the following advantages. The first pin and the second pin are formed into the integral first joint and the integral second joint by processes such as fusion welding and extrusion, and the first joint and the second joint have smooth surfaces and no gaps. The first joint and the second joint can be directly welded with the fuse core, thereby solving the technical problem that the multi-strand loose wires cannot be directly welded with the fuse core in a conventional state, abandoning the conventional mode of secondary welding through external terminals, thereby avoiding the influence of secondary welding on the function of the fuse itself, and greatly improving the production efficiency and reducing the production cost.

[0023] The above description is only a summary of the technical solutions of the present disclosure. In order to enable the technical means of the present disclosure to be more clearly understood, the following specific embodiments of the present disclosure are described in accordance with the content of the specification, and in order to enable the above and other purposes, features and advantages of the present disclosure to be more apparent and easy to understand, the following specific embodiments of the present disclosure are described. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor. In the following description, the positional relationship described in the drawings is based on the direction of the components shown in the drawings, unless otherwise specified.

[0025] Fig. 1 is an exploded structural schematic view of a multi-strand pin temperature fuse according to an embodiment of the present application;

[0026] Fig. 2 is a structural schematic view of a shell according to an embodiment of the present application;

[0027] Fig. 3 is a structural schematic view of a shell according to a second embodiment of the present application;

[0028] Fig. 4 is a structural schematic view of a shell according to a third embodiment of the present application;

[0029] Fig. 5 is a structural schematic view of a shell according to a fourth embodiment of the present application.

[0030] 10 - housing 20 - pin 30 - fuse core 40 - insulation layer 50 - first joint 60 - second joint 70 - first end 80 - second end 90 - communication module 11 - housing 12 - upper cover 21 - first pin 22 - second pin 111 - melting cavity 112 - first sealing cavity 113 - first guide hole 114 - second sealing cavity 115 - second guide hole 116 - communication cavity Embodiments

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, the term "comprising" and any variation thereof means "at least including".

[0033] Please refer to FIG. 1 and FIG. 2, FIG. 1 is an exploded structural schematic view of a multi-strand pin temperature fuse provided by an embodiment of the present application; and FIG. 2 is a structural schematic view of a housing provided by an embodiment of the present application.

[0034] To solve the technical problems of the conventional multi-strand pin temperature fuse, or to achieve at least one of the above advantages or other advantages, an embodiment of the present application provides a multi-strand pin temperature fuse. As shown in the figure, the multi-strand pin temperature fuse includes a shell 10 and a pin 20. The inside of the shell 10 is provided with a fuse core 30.

[0035] The pin 20 includes a first pin 21 and a second pin 22. The first pin 21 and the second pin 22 are both collected by multi-strand wire bundles, weaves or windings, etc. In this embodiment, the bundle method is adopted. Preferably, the outer side of the first pin 21 and the second pin 22 is covered with an insulating layer 40.

[0036] In specific implementation, the end of the first pin 21 and the end of the second pin 22 form an integrated first joint 50 and an integrated second joint 60 respectively. The first joint 50 and the second joint 60 can directly extend into the shell 10 and be welded with the fuse core 30 respectively, thereby achieving the purpose of not needing secondary welding through external terminals, avoiding the influence of secondary welding on the function of the fuse itself, and being able to greatly improve production efficiency and reduce production cost.

[0037] Specifically, the first joint 50 is formed by the end of the first pin 21, after the insulating layer 40 is stripped to expose the multi-strand wires, the multi-strand wires are subjected to fusion welding, extrusion and other processes (conventional technical means) to form an integrated joint with smooth surface and no gap. The second joint 60 is the same. To solve the technical problem that the multi-strand loose wires cannot be directly welded with the fuse core 30 in the conventional state.

[0038] It should be noted that the first joint 50 and the second joint 60 can be fusion welded by resistance welding, ultrasonic welding and other conventional fusion welding means, or can be formed by mechanical means such as extrusion, as long as an integrated joint with smooth surface and no gap can be formed, which is not limited in the present case.

[0039] In some preferred embodiments, the first joint 50 and the second joint 60 are one of rectangular, cylindrical, arc-shaped or polygonal, which can be designed according to the needs in actual application, and are not limited herein. Preferably, the first joint 50 and the second joint 60 are rectangular, which have larger welding area and can be more stably welded with the fuse core 30, and at the same time provide a larger adsorption area for the fuse core 30 when it melts, to ensure that the fuse core 30 is completely cut off after melting.

[0040] Preferably, the material of the first joint 50 and the second joint 60 can be copper or copper alloy, which has high reliability in welding with the fuse core 30.

[0041] Preferably, the first joint 50 and the second joint 60 can be made of copper or copper alloy, which has high reliability in welding with the fuse core 30. The plurality of wires of the first pin 21 other than the first joint 50 and the plurality of wires of the second pin 22 other than the second joint 60 can be made of any conductive material, such as aluminum, copper, silver, etc. When the first joint 50 and the plurality of wires of the first pin 21 other than the first joint 50 are made of different materials, the connection can be made by crimping, splicing or other non-welding methods. The same applies to the second joint 60 and the plurality of wires of the second pin 22 other than the second joint 60.

[0042] The first pin 21 has a first end 70 connected to an end thereof away from the first joint 50. The second pin 22 has a second end 80 connected to an end thereof away from the second joint 60. The plurality of wires can be connected to a circuit through the first end 70 and the second end 80. The first end 70 and the second end 80 in the embodiment are provided with screw holes, and the plurality of wires can be connected to the circuit by screwing.

[0043] In some preferred embodiments, the housing 10 comprises a shell 11 and a cover 12. In particular implementations, the shell 11 is provided with a melting cavity 111 and a first sealing cavity 112.

[0044] Specifically, the fuse core 30 is arranged in the melting cavity 111. A first guide hole 113 is formed between the melting cavity 111 and the first sealing cavity 112. The first joint 50 and the second joint 60 extend into the melting cavity 111 through the first guide hole 113, and the first joint 50 and the second joint 60 are welded to the two ends of the fuse core 30, respectively. The melting cavity 111 is filled with a fluxing agent. When overcurrent or overtemperature occurs, the fluxing agent can make the fuse core 30 melt more quickly, thereby cutting off the circuit and avoiding safety accidents.

[0045] The first sealing cavity 112 is filled with a sealing material. When the first joint 50 and the second joint 60 extend into the melting cavity 111, the sealing material at least wraps part of the insulation layer 40. That is, when the first joint 50 and the second joint 60 extend into the melting cavity 111 and are welded to the fuse core 30, the insulation layer 40 wrapped on the first pin 21 and the second pin 22 is at least partially located in the first sealing cavity 112. At this time, the sealing material is filled in the first sealing cavity to complete the sealing, and the insulation layer 40 is at least partially wrapped by the sealing material, so that the first pin 21 and the second pin 22 are completely insulated from the outside, without the need for additional wrapping of heat-shrinkable tubes or other insulation wrapping members, which can greatly reduce the production process and production cost. Preferably, the sealing material is resin.

[0046] On the basis of the above, the cover 12 is connected to the shell 11. When the first joint 50 and the second joint 60 are welded to the fuse core 30, and the fluxing agent is filled, the cover 12 is closed on the shell 11 to form an integral housing.

[0047] It can be understood that the shell 10 can be made of different materials such as plastic, ceramic, etc. And the shell 10 can also be made into an open type at one end, an up-down opening type, a left-right opening type, etc. When using the up-down opening type or the left-right opening type, the upper cover 12 and the shell 11 can be combined by ultrasonic welding, resin adhesion, etc. This case is not limited.

[0048] In some preferred embodiments, when the first joint 50 extends into the molten cavity 111 through the first guide hole 113 and communicates with the core 30, the other end of the first joint 50 is not in the same straight line with the first pin 21. That is, when the first joint 50 is welded to the core 30, it is bent and deflected. At this time, the other end of the first joint 50 away from the first pin 21 is not in the same straight line with the first joint 50, which can improve the tensile strength and avoid the disconnection of the first joint 50 and the core 30 caused by tension. Even in the case of softening of the sealing material in a high temperature environment, the stable connection of the first joint 50 and the core 30 can be ensured.

[0049] When the second joint 60 extends into the molten cavity 111 through the first guide hole 113 and communicates with the core 30, the other end of the second joint 60 is not in the same straight line with the second pin 22. That is, when the second joint 60 is welded to the core 30, it is bent and deflected. At this time, the other end of the second joint 60 away from the second pin 22 is not in the same straight line with the second joint 60, which can improve the tensile strength and avoid the disconnection of the second joint 60 and the core 30 caused by tension. Even in the case of softening of the sealing material in a high temperature environment, the stable connection of the second joint 60 and the core 30 can be ensured.

[0050] It should be understood that the above scheme is the preferred scheme of the present embodiment. In actual application scenarios, the first joint 50 and the second joint 60 can also be in the same straight line with the first pin 21 and the second pin 22, or the first joint 50 and the first pin 21 can be in the same straight line, and the second joint 60 and the second pin 22 are not in the same straight line, or vice versa. It can be adjusted according to actual needs, which is within the protection scope of the present application.

[0051] In some preferred embodiments, as shown in FIG. 2, the first joint 50 and the second joint 60 are bent and deflected simultaneously towards the core 30. At this time, the first joint 50 and the second joint 60 are symmetrically arranged at both ends of the core 30. It can be understood that the first joint 50 and the second joint 60 can also be bent and deflected simultaneously away from the core 30.

[0052] In some preferred embodiments, as shown in FIG. 3, the first joint 50 and the second joint 60 can be bent and deflected simultaneously to the same side.

[0053] In some preferred embodiments, as shown in FIG. 4, the multi-strand lead temperature fuse further comprises a second sealing cavity 114. The second sealing cavity 114 is arranged on the side of the melting cavity 111 opposite to the first sealing cavity 112, and a second guide hole 115 is arranged between the second sealing cavity 114 and the melting cavity 111. The second sealing cavity 114 is filled with a sealing material.

[0054] In specific implementation, the multi-strand lead temperature fuse can be an axial type, i.e., the first lead 21 and the second lead 22 are arranged on the two sides of the melting cavity 111. The first terminal 50 extends into the melting cavity 111 through the first guide hole 113, is bent and deflected, and is welded to the fuse core 30. At this time, the insulating layer 40 outside the first lead 21 is at least partially located in the first sealing cavity 112 and is covered by the sealing material.

[0055] The second terminal 60 extends into the melting cavity 111 through the second guide hole 115, is bent and deflected, and is welded to the fuse core 30. At this time, the insulating layer 40 of the second lead 22 is at least partially located in the second sealing cavity 114 and is covered by the sealing material.

[0056] In some preferred embodiments, as shown in FIG. 5, the multi-strand lead temperature fuse further comprises a communication module 90. In specific implementation, a communication cavity 116 is arranged on the shell 11. The communication module 90 is arranged in the communication cavity 116. The communication cavity 116 is isolated from the melting cavity 111 and the first sealing cavity 112 and / or the second sealing cavity 114. The communication module 90 can identify the presence or absence of a signal or whether the signal is correct.

[0057] In some preferred embodiments, the communication cavity 116 is filled with an elastic material to avoid damage to the communication module 90 caused by thermal expansion and contraction of the sealing material during use. Preferably, the elastic material is one of silicone, polyurethane, or flexible epoxy resin.

[0058] In some preferred embodiments, the present application further provides a device comprising the multi-strand lead temperature fuse described above.

[0059] In summary, the multi-strand lead temperature fuse and the device provided by the present application solve the technical problem that the multi-strand lead temperature fuse cannot be directly welded to the fuse core in the conventional state by forming an integral first terminal and an integral second terminal through processes such as fusion welding and extrusion after the multi-strand leads in the first lead and the second lead. The first terminal and the second terminal can be directly welded to the fuse core, eliminating the conventional secondary welding method through external terminals, thereby avoiding the influence of secondary welding on the function of the fuse itself and greatly improving production efficiency and reducing production cost.

[0060] Although the terms such as pin, integral connector and the like are used more frequently herein, the possibility of using other terms is not excluded. These terms are used only for the convenience of describing and explaining the essence of the present application; it is against the spirit of the present application to interpret them as any kind of additional limitation.

[0061] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present application can only improve in one or several aspects, and it is not necessary to solve all the technical problems listed in the prior art or background art at the same time. Those skilled in the art should understand that what is not mentioned in a claim should not be regarded as a limitation on the claim.

[0062] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-strand pin temperature fuse, characterized by, The shell is internally provided with a fuse core; The pin comprises a first pin and a second pin, both of which are composed of a plurality of wires, and the ends of the first pin and the second pin form a first joint and a second joint respectively, which extend into the shell and are respectively communicated with the fuse core; The first joint and the second joint are one-piece joints. The first joint is formed by fusion welding of the plurality of wires of the first pin, and the second joint is formed by fusion welding of the plurality of wires of the second pin.

2. The multi-strand pin temperature fuse of claim 1, wherein, The first joint and the second joint are one of rectangular, cylindrical, arc-shaped or polygonal.

3. The multi-strand pin temperature fuse of claim 1, wherein, The first joint and the second joint are made of copper or copper alloy.

4. The multi-strand pin temperature fuse of claim 1, wherein, When the first joint extends into the shell and is communicated with the fuse core, the other end of the first pin is not in the same straight line as the first joint, and when the second joint extends into the shell and is communicated with the fuse core, the other end of the second pin is not in the same straight line as the second joint.

5. The multi-strand pin temperature fuse of claim 1, wherein, The shell comprises a shell body and an upper cover, the shell body is provided with a melting cavity and a first sealing cavity, the fuse core is located in the melting cavity, a first guide hole is opened between the melting cavity and the first sealing cavity, the first joint and the second joint extend into the melting cavity through the first guide hole and are respectively communicated with the fuse core, and the upper cover is connected to the shell body.

6. The multi-strand pin temperature fuse of claim 1, wherein, The melting cavity is filled with a fluxing agent.

7. The multi-strand pin temperature fuse of claim 6, wherein, The first sealing cavity is filled with a sealing material, the first pin and the second pin are coated with an insulating layer, and when the first joint and the second joint extend into the melting cavity, the sealing material at least wraps part of the insulating layer.

8. The multi-strand pin temperature fuse of claim 6, wherein, The multi-strand wire pin temperature fuse further comprises a second sealing cavity, which is arranged on the side of the melting cavity away from the first sealing cavity, a second guide hole is arranged between the second sealing cavity and the melting cavity, and the second sealing cavity is filled with a sealing material.

9. The multi-strand pin temperature fuse of claim 6, wherein, The multi-strand wire pin temperature fuse further comprises a communication module, the shell body is provided with a communication cavity, the communication module is located in the communication cavity, and the communication cavity is isolated from the melting cavity and the first sealing cavity and / or the second sealing cavity.

10. The multi-strand pin temperature fuse of claim 6, wherein, The multi-strand wire pin temperature fuse as claimed in any one of claims 1-10.

11. An apparatus, comprising: ​

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