A three-terminal fuse convenient to make

Abstract

The utility model relates to a three -terminal fuse convenient to make, including, the substrate is provided with two side electrode and at least one heating body electrode, the fusing structure is set up in the substrate, the fusing structure is connected with side electrode, heating body electrode, the utility model discloses a three -terminal fuse convenient to make can be connected through the mode of gluing each layer assembly, forms the whole.

Description

Technical Field

[0001] This utility model belongs to the field of fuse technology, specifically a three-terminal fuse that is easy to manufacture. Background Technology

[0002] Existing fuses are widely used in electronic circuits to protect circuit components under overcurrent or overheating conditions. However, traditional fuses have some limitations in structural design and manufacturing processes. For example, the fusing performance of conductive lines is not precise enough, the complex photolithography process during manufacturing leads to high costs, and the connection stability between electrodes and the substrate is insufficient. These problems are particularly prominent in high-precision electronic devices, which may result in poor circuit protection or shortened device lifespan.

[0003] Furthermore, the insulating and protective layer materials of traditional fuses are susceptible to environmental factors such as humidity or temperature changes during long-term use, which can affect the reliability and stability of the device. To address these issues, the industry has attempted to improve fuse performance by modifying substrate materials, optimizing electrode structures, and introducing more advanced manufacturing processes. For example, using printed circuit boards or BT resin substrates can improve electrical insulation and mechanical strength, but achieving efficient electrode connections and precise formation of conductive lines on these substrates remains a technical challenge. Existing three-terminal fuse heating element structures are electrically connected to heating element electrodes, with the fuse melting by heat transferred from the electrodes after being stacked on top of them; this process is complex.

[0004] In addition, the traditional three-terminal fuse's fusing structure is cumbersome to install on the surface, requiring a solution with better overall performance. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Given the following technical problems in the existing technology: the difficulty in manufacturing existing three-terminal fuses.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a three-terminal fuse that is easy to manufacture, characterized in that it includes,

[0008] A substrate having two side electrodes and at least one heating element electrode disposed thereon.

[0009] A fusible structure is disposed on the substrate and is connected to the side electrode and the heating element electrode.

[0010] As a preferred technical solution for a three-terminal fuse that is easy to manufacture, the fusion structure includes a carrier plate, a fusible element disposed above the carrier plate, and a heating element disposed below the carrier plate.

[0011] As a preferred technical solution for a three-terminal fuse that is easy to manufacture, a flux is provided above the melt.

[0012] As a preferred technical solution for a three-terminal fuse that is easy to manufacture, the side electrode includes a portion connected to an external circuit and a portion extending toward the center of the substrate.

[0013] As a preferred technical solution for a three-terminal fuse that is easy to manufacture, a through hole is provided on the substrate at the side electrode.

[0014] As a preferred technical solution for a three-terminal fuse that is easy to manufacture, the two side electrodes are arranged opposite each other, and the heating element electrode is arranged adjacent to the two side electrodes.

[0015] As a preferred technical solution for a three-terminal fuse that is easy to manufacture, the carrier plate is provided with a first through hole arranged opposite to each other, the two ends of the molten material are located at the first through hole, and conductive adhesive is provided at the first through hole to connect the molten material and the side electrode.

[0016] As a preferred technical solution for a three-terminal fuse that is easy to manufacture, one end of the heating element is disposed at the heating element electrode and electrically connected to the heating element electrode.

[0017] As a preferred technical solution for a three-terminal fuse that is easy to manufacture, the heating element is connected to the second conductive end at both ends, and a third through hole is provided in the middle of the carrier plate. Conductive adhesive or conductive layer is provided in the third through hole to electrically connect the heating element and the melt.

[0018] As a preferred technical solution for a three-terminal fuse that is easy to manufacture, the molten metal is provided with a narrow section.

[0019] The beneficial effects of this utility model are: the three-terminal fuse of this utility model, which is easy to manufacture, can be assembled by gluing the layers together to form a whole. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0021] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the substrate and the fusion structure in the present invention.

[0023] Figure 3 This is a schematic diagram of the heating element in this utility model;

[0024] Figure 4 This is a schematic diagram of the exploded structure of the fusion structure in this utility model;

[0025] Figure 5 This is a schematic diagram of the present invention.

[0026] Reference numerals: 200, fusible structure; 300, flux; 100, substrate; 103, through hole; 201a, first through hole; 101, side electrode; 102, heating element electrode; 203, heating element; 101b, second conductive end; 201, carrier plate; 201c, third through hole; 202, melt; 301, narrow portion. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0030] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0031] Example 1

[0032] Reference Figures 1-5This embodiment provides a three-terminal fuse that is easy to manufacture, including a substrate 100, on which two side electrodes 101 and at least one heating element electrode 102 are disposed.

[0033] A fusible structure 200 is disposed on a substrate 100 and is connected to a side electrode 101 and a heating element electrode 102.

[0034] The substrate 100 is made of BT resin material, which has excellent electrical insulation and mechanical strength. The conventional shape is square, but it can also be made into a circle. A through hole 103 is provided on the substrate 100 at the side electrode 101 for electrode connection.

[0035] The fusion structure 200 includes a carrier plate 201, a melt 202 disposed above the carrier plate 201, and a heating element 203 disposed below the carrier plate 201.

[0036] The heating element 203 is composed of NiCr alloy conductive lines, which are formed on the surface of the substrate 100 by lift-off photolithography. These conductive lines undergo Joule heating under overcurrent conditions. Two side electrodes 101 are formed by through-hole printing and are electrically connected to the conductive lines to form a current path.

[0037] The melt 202 is fixed to the substrate 100 by adhesive bonding, which is convenient for manufacturing. The flux 300 is fixed to the melt 202 by adhesive bonding. The fuse structure 200 is also fixed to the substrate 100 by adhesive bonding and forms a circuit connection with the substrate 100.

[0038] Flux 300 is made of Sn / Ni / Cu.

[0039] The side electrode includes a portion that connects to external circuitry and a portion that extends toward the center of the substrate.

[0040] The electrode leads are designed to ensure electrical connection with the melt and heating element.

[0041] In this embodiment, two side electrodes 101 are provided and are located on opposite sides of the substrate 100. If the substrate 100 is a square plate, the side electrodes 101 are located on opposite sides of the substrate 100. The heating element electrodes 102 are located on either side of the line perpendicular to the side electrodes 101 or on both sides. Preferably, two heating element electrodes 102 are provided to facilitate the selection of direction when installing the fusible structure 200.

[0042] A through hole 103 is provided on the substrate 100 at the side electrode 101.

[0043] The two side electrodes 101 are arranged opposite each other, and the heating element electrode 102 is arranged adjacent to the two side electrodes 101.

[0044] The carrier plate 201 is provided with a first through hole 201a that is arranged opposite to each other. The two ends of the melt 202 are located at the first through hole 201a. Conductive adhesive is provided at the first through hole 201a to connect the melt 202 and the side electrode 101.

[0045] The carrier plate 201 is also provided with a second through hole 201b on its side. One end of the heating element 203 is provided at the second through hole 201b. Conductive adhesive is provided at the second through hole 201b to connect the heating element 203 and the second conductive end 101b.

[0046] The second through hole 201b is disposed around the periphery of the carrier plate 201, between the two first through holes 201a.

[0047] One end of the heating element 203 is disposed at the heating element electrode 102 and is electrically connected to the heating element electrode 102.

[0048] One end of the heating element 203 is connected to the heating element electrode 102. A third through hole 201c is provided in the middle of the carrier plate 201. Conductive adhesive or conductive layer is provided in the third through hole 201c to electrically connect the heating element 203 and the melt 202.

[0049] The melt 202 is provided with a narrow section 301, which is formed by corresponding groove rows provided on the melt 202 and the flux 300. When the current is abnormal at the narrow section, the heating element heats the melt to break it. The groove is the breaking point.

[0050] Specifically, two side electrodes 101 are formed and connected to the melt 202 to form a conductive connection. At the same time, the second conductive end 101b is connected to both ends of the heating element 203 to form a conductive connection. The middle of the melt 202 and the middle of the heating element 203 are connected by conductive adhesive at the third through hole 201c to form a conductive connection.

[0051] An insulating encapsulation layer is also provided on the carrier board 201 to cover and encapsulate the fusible structure 200.

[0052] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A three-terminal fuse that is easy to manufacture, characterized in that: include, A substrate (100) having two side electrodes (101) and at least one heating element electrode (102) disposed thereon. A fusible structure (200) is disposed on the substrate (100) and is connected to the side electrode (101) and the heating element electrode (102).

2. The easy-to-manufacture three-terminal fuse according to claim 1, characterized in that: The fusion structure (200) includes a carrier plate (201), a melt (202) disposed above the carrier plate (201), and a heating element (203) disposed below the carrier plate (201).

3. The easy-to-manufacture three-terminal fuse according to claim 2, characterized in that: A flux (300) is disposed above the melt (202).

4. The easy-to-manufacture three-terminal fuse according to claim 2, characterized in that: The side electrode (101) includes a portion connected to an external circuit and a portion extending toward the center of the substrate.

5. The easy-to-manufacture three-terminal fuse according to claim 2, characterized in that: A through hole (103) is provided on the substrate (100) at the side electrode (101).

6. The easily manufactured three-terminal fuse according to any one of claims 3 to 5, characterized in that: The two side electrodes (101) are arranged opposite each other, and the heating element electrode (102) is arranged adjacent to the two side electrodes (101).

7. The easy-to-manufacture three-terminal fuse according to claim 2, characterized in that: The carrier plate (201) is provided with a first through hole (201a) arranged opposite to each other. The two ends of the melt (202) are located at the first through hole (201a). Conductive adhesive is provided at the first through hole (201a) to connect the melt (202) and the side electrode (101).

8. The easy-to-manufacture three-terminal fuse according to claim 2, characterized in that: One end of the heating element (203) is disposed at the heating element electrode (102) and is electrically connected to the heating element electrode (102).

9. The easy-to-manufacture three-terminal fuse according to claim 6, characterized in that: One end of the heating element (203) is connected to the heating element electrode (102), and a third through hole (201c) is provided in the middle of the carrier plate (201). Conductive adhesive or conductive layer is provided in the third through hole (201c) to electrically connect the heating element (203) and the melt (202).

10. The easy-to-manufacture three-terminal fuse according to claim 7, characterized in that: The melt (202) is provided with a narrow section (301).

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