Low-power explosion-proof lead-free wire-wound fusing resistor
By introducing explosion-proof retaining rings and epoxy resin shells into the resistor, combined with ceramic insulating substrate and copper electrodes, the problem of explosion risk of traditional resistors in flammable and explosive environments is solved, realizing the explosion-proof performance and miniaturized design of the resistor, and improving the safety and integration of electronic devices.
Patent Information
- Application Number
- CN202520222689.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-12
AI Technical Summary
In the existing technology, it is difficult to achieve explosion protection for circuits with resistors in low-power circuits, and the explosion protection problem of circuits cannot be effectively solved.
A low-power explosion-proof leadless wire-wound fusible resistor was designed. Through circuit design, a unique explosion-proof structure and special encapsulation materials were adopted, including an explosion-proof retaining ring and an epoxy resin shell. Combined with a ceramic insulating substrate and copper electrodes, the resistor achieved explosion-proof performance and miniaturized design.
It achieves safe and reliable resistors in flammable and explosive environments, reduces the risk of explosion, supports the miniaturization and high-density integration of circuits, and improves the functionality and performance of electronic devices.
Smart Images
Figure CN223743585U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of resistance explosion -proof, specifically, a low -power explosion -proof no -lead wire -wound fuse resistance. BACKGROUND
[0002] In today's rapid development of electronic technology era, all kinds of electronic equipment is with unprecedented speed towards miniaturization, intelligent and integrated direction evolution. Whether it is daily use's smart mobile phone, tablet computer or industrial field's precision instrument, automation control system is constantly pursuing higher performance and smaller volume. Under such development trend, the requirement of electronic circuit to resistance element also becomes increasingly strict.
[0003] Traditional resistor gradually exposes many limitations in low -power circuit application. First, in power control aspect, traditional resistance often difficultly accurately adapts the demand of low -power circuit. For those who are extremely sensitive to current change low -power equipment, traditional resistance can not respond to abnormal current in time, accurately, thereby can not effectively protect other key elements in circuit, increases the risk of equipment damage. Secondly, in explosion -proof performance, the design of traditional resistance has not fully considered the safety demand of some special application scene. The electronic equipment used in flammable and explosive environment such as petroleum chemical industry, coal mining, once the resistance produces spark or high temperature due to overload, short circuit etc. fault, it is extremely possible to cause serious explosion accident, brings great threat to life and property safety.
[0004] In view of this, a low -power explosion -proof no -lead wire -wound fuse resistance is needed to improve the deficiency of prior art. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a low -power explosion -proof no -lead wire -wound fuse resistance to solve the problem raised in the above -mentioned background art.
[0006] To achieve the above -mentioned purpose, the utility model provides a low -power explosion -proof no -lead wire -wound fuse resistance, including resistance body, the resistance body includes the shell, the shell surface is connected with the explosion -proof snap ring for explosion -proof, the explosion -proof snap ring surface is equipped with the vent hole, the shell is hollow in the inside, the shell is inserted with insulating matrix, the cavity is equipped between the shell and insulating matrix, the vent hole is communicated with the cavity between shell and insulating matrix, the vent hole is used for reducing the internal pressure of cavity, the shell adopts epoxy resin material.
[0007] As further improvement of the technical scheme, the insulating matrix adopts ceramic material, and the surface of the insulating matrix is provided with a spiral groove along the length direction.
[0008] As a further improvement of the technical solution, the surface of the insulating base body is wound with a resistance wire, and the resistance wire is wound along the groove.
[0009] As a further improvement of the technical solution, the shell is fixedly connected with a first electrode and a second electrode at two ends respectively, and the first electrode and the second electrode are fixedly connected with the resistance wire respectively.
[0010] As a further improvement of the technical solution, the first electrode and the second electrode are made of copper material, and the surfaces of the first electrode and the second electrode are plated with tin.
[0011] Compared with the prior art, the utility model has the advantages of:
[0012] The low-power explosion-proof leadless wire-wound fuse resistor adopts a unique explosion-proof structure design and special packaging material. In the moment of resistance fusing, the internal pressure can be effectively inhibited and limited in the resistor, preventing the external diffusion and explosion. The explosion-proof performance enables the resistor to be safely and reliably applied to the special environment of inflammable and explosive such as petroleum, chemical industry and coal mine, providing strong safety guarantee for the electronic equipment in these fields. The leadless structure design greatly reduces the overall size of the resistor and occupies less space on the circuit board. This not only helps the electronic equipment to realize miniaturization design and meet the demand of modern electronic products for lightness, thinness and portability, but also facilitates the realization of higher density component integration in limited circuit board space. By improving the integration of the circuit board, the function and performance of the electronic equipment can be further improved, promoting the development of electronic technology to a higher level. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a whole structure schematic view of the embodiment;
[0014] Figure 2 It is a shell structure schematic view of the embodiment;
[0015] Figure 3 It is an insulating base body structure schematic view of the embodiment;
[0016] Figure 4 It is an explosion-proof snap ring structure schematic view of the embodiment.
[0017] The meanings of various signs in the drawings are as follows:
[0018] 1, resistance body;10, shell;11, first electrode;12, second electrode;13, explosion-proof snap ring;130, air hole;14, insulating base body;15, groove;16, resistance wire. DETAILED DESCRIPTION
[0019] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0020] Please refer to Figures 1-4 As shown in the figure, the embodiment provides a low-power explosion-proof leadless wire-wound fuse resistor, which comprises a resistor body 1, the resistor body 1 comprises a shell 10, the surface of the shell 10 is fixedly connected with an explosion-proof snap ring 13 for explosion prevention, the surface of the explosion-proof snap ring 13 is provided with a vent hole 130, the shell 10 is hollow inside, the shell 10 is inserted with an insulating base body 14 inside, a cavity is arranged between the shell 10 and the insulating base body 14, the vent hole 130 is communicated with the cavity between the shell 10 and the insulating base body 14, the vent hole 130 is used for reducing the internal pressure of the cavity, and the shell 10 is made of epoxy resin material.
[0021] The working principle is as follows: firstly, when the fuse resistor works, heat and gas are generated due to overcurrent and the like of the resistor body 1, the heat may cause the internal pressure to rise, at this time, since the shell 10 is fixedly connected with the explosion-proof snap ring 13 on the surface, and the surface of the explosion-proof snap ring 13 is provided with the vent hole 130, the vent hole 130 is communicated with the cavity between the shell 10 and the insulating base body 14, the rising pressure will make the gas discharged to the outside through the vent hole 130, so as to reduce the internal pressure of the cavity, avoid explosion caused by excessive pressure, and play an explosion-proof role. At the same time, the shell 10 is made of epoxy resin material, which can ensure certain strength and insulation performance, protect the insulating base body 14 and other possible resistance structures inside, and maintain the normal work of the resistance.
[0022] In order to provide a corresponding resistance, therefore, in the embodiment, the insulating base body 14 is made of ceramic material, the surface of the insulating base body 14 is provided with a spiral groove 15 along the length direction, the surface of the insulating base body 14 is wound with a resistance wire 16, the resistance wire 16 is wound along the groove 15, the ceramic has good insulation performance and high temperature resistance characteristics, and can provide stable support and insulation environment for the resistance wire 16. The surface of the insulating base body 14 is provided with a spiral groove 15 along the length direction, and the resistance wire 16 is wound along the groove 15. This design can accurately adjust the resistance value of the resistance by accurately controlling the winding turns, length of the resistance wire 16, and the material and cross-sectional area of the resistance wire 16 itself, so as to meet the requirements of different circuits on the resistance value.
[0023] In order to enhance the conductivity, therefore, in the embodiment, the shell 10 is fixedly connected with the first electrode 11 and the second electrode 12 at both ends, respectively, and the first electrode 11 and the second electrode 12 are fixedly connected with the resistance wire 16, respectively. The electrode functions to connect the resistance wire 16 into the circuit, so that the current can smoothly pass through the resistance. The first electrode 11 and the second electrode 12 function as a bridge for current conduction, introduce the current of the external circuit into the resistance wire 16, and then output the current after current limiting by the resistance wire 16 to the external circuit.
[0024] In order to facilitate welding, therefore, in the embodiment, the first electrode 11 and the second electrode 12 are made of copper, and the surfaces of the first electrode 11 and the second electrode 12 are plated with tin. Tin has a relatively low melting point and good wettability. In the welding process, the relatively low melting point enables tin to melt at a relatively low temperature, thereby reducing the difficulty of welding and the risk of thermal damage to the electrode and surrounding elements.
[0025] The low-power explosion-proof leadless wire-wound fuse resistor in the embodiment, when used, first uses a ceramic material for the insulating base 14, which has good insulation and high temperature resistance, thereby providing a stable support foundation for the entire resistance structure. The insulating base 14 is provided with a spiral groove 15 along the length direction on the surface, and the resistance wire 16 is wound along the groove 15. By precisely controlling the material, winding turns, groove 15 spacing, etc. of the resistance wire 16, the resistance value of the resistance can be precisely adjusted to meet the needs of different circuits for resistance values.
[0026] The first electrode 11 and the second electrode 12 fixedly connected at both ends of the shell 10 are made of copper and plated with tin on the surface. Copper has excellent conductivity, which can ensure efficient transmission of current, and tin plating reduces the difficulty of welding and improves the reliability and stability of welding. The first electrode 11 and the second electrode 12 are fixedly connected with the resistance wire 16, respectively, which connects the resistance wire 16 into the circuit, so that the current flows from the first electrode 11, is current-limited and voltage-divided by the resistance wire 16 wound on the insulating base 14, and then flows out from the second electrode 12, forming a complete current path, thereby realizing the basic function of the resistance in the circuit.
[0027] When an abnormality occurs in the circuit, such as an overload or short circuit, causing the current flowing through the resistance wire 16 to be too large, the resistance wire 16 will generate a large amount of heat. These heat will make the air in the cavity between the shell 10 and the insulating base 14 expand due to heating, causing the internal pressure of the cavity to rise. At this time, the explosion-proof snap ring 13 fixed on the surface of the shell 10 plays a role. The explosion-proof snap ring 13 is provided with a vent hole 130 on the surface, and the vent hole 130 is in communication with the cavity between the shell 10 and the insulating base 14. The rising pressure will drive the gas in the cavity to be discharged to the outside through the vent hole 130, thereby reducing the internal pressure of the cavity, avoiding the risk of the shell 10 being broken or even exploded due to the excessively high pressure, and effectively protecting the safety of the resistance and the entire circuit. At the same time, the shell 10 is made of epoxy resin material, which has good strength and insulation performance, further enhancing the safety and stability of the resistance, and protecting the internal structure and maintaining the normal operation of the resistance under normal working and abnormal conditions.
[0028] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and do not limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. A low power, explosion-proof, leadless, wire-wound fusing resistor, characterized by: The utility model provides an explosion -proof resistance, including resistance body (1), resistance body (1) includes shell (10), be used for preventing explosion's explosion -proof snap ring (13) is fixedly connected to shell (10) surface, explosion -proof snap ring (13) surface is equipped with vent hole (130), the inside hollow of shell (10), the insulating matrix (14) is inserted in the inside of shell (10), the cavity between shell (10) and insulating matrix (14) is equipped with, vent hole (130) with the cavity between shell (10) and insulating matrix (14) intercommunication, vent hole (130) is used to reduce the pressure inside cavity, shell (10) adopts epoxy resin material.
2. The low power explosion-proof leadless, wirewound fuse resistor of claim 1, wherein: The insulating matrix (14) is made of ceramic material, and the surface of the insulating matrix (14) is provided with a spiral groove (15) along the length direction.
3. The low power explosion-proof leadless, wirewound fuse resistor of claim 2, wherein: The surface of the insulating matrix (14) is wound with a resistance wire (16), and the resistance wire (16) is wound along the groove (15).
4. The low power explosion-proof leadless, wirewound fuse resistor of claim 3, wherein: The shell (10) is fixedly connected with a first electrode (11) and a second electrode (12) at both ends, respectively, and the first electrode (11) and the second electrode (12) are fixedly connected with the resistance wire (16), respectively.
5. The low power explosion-proof leadless, wirewound fuse resistor of claim 4, wherein: The first electrode (11) and the second electrode (12) are made of copper material, and the surfaces of the first electrode (11) and the second electrode (12) are plated with tin.