Direct current power supply reverse connection fuse

Abstract

The utility model relates to the related technical field of fuse, disclose a kind of DC power supply anti-reverse connection fuse, including insulating seat, installation screw hole is provided in insulating seat, the both ends of insulating seat are provided with clamping groove, and electrically-conductive clamp is installed in clamping groove, and the top of clamping groove is fixedly connected with tongue, and the tongue and clamping groove are mutually matched to electrically-conductive clamp and are clamped and fixed, and the top of electrically-conductive clamp is fixedly connected with the elastic chuck made of elastic metal plate, fuse is arranged between the elastic chuck, and the both ends of fuse are fixedly connected with installation contact, the utility model is matched with the positioning groove on installation contact by the positioning block of asymmetric setting, only when fuse is connected correctly can be inserted completely installation.If reverse, then positioning block and positioning groove are misaligned, form mechanical interference, cannot be installed, fundamentally avoid the risk of equipment damage caused by power polarity reverse, and anti-reverse connection reliability is high.

Description

Technical Field

[0001] This utility model relates to the technical field of fuses, specifically a DC power supply reverse connection protection fuse. Background Technology

[0002] DC power supplies are increasingly used in industrial control, new energy vehicles, communication equipment, and solar power systems, making their safety and reliability paramount. In practical applications, reversing the positive and negative terminals of the power supply can easily damage semiconductor devices, capacitors, and other components in the circuit, potentially leading to equipment malfunctions or safety accidents. Therefore, reverse connection protection has become a critical safety measure in DC power supply systems.

[0003] Common reverse connection protection measures include using electronic components such as diodes and MOSFETs to determine polarity and provide shutdown protection. While effective, these methods suffer from issues such as voltage drop, high power consumption, or high cost. Other mechanical reverse connection protection structures, such as those using connectors of specific shapes to prevent mis-insertion, are complex, inconvenient to install, and often not integrated with overcurrent protection.

[0004] As a core component for circuit overcurrent protection, fuses, when integrated with reverse connection protection, would greatly enhance the safety and integration of DC power supply systems. However, most existing fuse products only offer fuse protection and lack reverse connection protection mechanisms. If users do not pay attention to polarity during installation, there is still a risk of reverse connection.

[0005] Therefore, it is necessary to propose a DC power supply fuse that is simple in structure, easy to install, and has both reverse connection protection and overcurrent protection functions, in order to solve the problems of complex reverse connection protection structure, high cost, and separation of reverse connection protection function from the fuse protection function in the existing technology. Utility Model Content

[0006] The purpose of this invention is to provide a DC power supply reverse connection protection fuse to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A DC power supply reverse polarity protection fuse includes an insulating base with mounting screw holes. The insulating base has slots at both ends, each containing a conductive clip. A protrusion is fixedly connected to the top of the slot, engaging with the slot to clamp the conductive clip. An elastic clamp made of a flexible metal plate is fixedly connected to the top of the conductive clip. A fuse is positioned between the elastic clamps, with mounting contacts fixedly connected to both ends of the fuse. The mounting contacts engage with the elastic clamps, providing elastic clamping and fixation. A positioning block is fixedly connected to the top of the protrusion, positioned within the elastic clamp. Two sets of positioning blocks are asymmetrically arranged. A positioning groove is provided at the bottom of the mounting contact, engaging with the positioning block. A limit baffle is fixedly connected to the side of the mounting contact closest to the fuse, engaging with the elastic clamp to slide and position the elastic clamp and the mounting contact.

[0009] As a further embodiment of this utility model: pole marks are provided at both ends of the outer wall of the insulating base.

[0010] As a further embodiment of this utility model, a connector is fixedly connected to the conductive clip.

[0011] As a further embodiment of this utility model: the bottom of the protruding tongue is provided with a threaded hole, the bottom of the insulating base is provided with a positioning mounting hole, and the bottom of the conductive clip is provided with a positioning insertion hole. The positioning insertion hole cooperates with the threaded hole and the positioning mounting hole. A positioning screw is installed in the positioning mounting hole, and the positioning screw passes through the positioning insertion hole and is threaded into the threaded hole.

[0012] Compared with existing technologies, the advantages of this invention are as follows: This invention uses asymmetrically arranged positioning blocks that cooperate with positioning grooves on the mounting contacts, ensuring that the fuse can only be fully inserted when connected correctly. If connected in reverse, the positioning blocks and positioning grooves will misalign, causing mechanical interference and preventing installation. This fundamentally avoids the risk of equipment damage caused by reversed power polarity, resulting in high reliability against reverse connection. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a DC power supply reverse connection protection fuse according to the present invention.

[0014] Figure 2 This is a cross-sectional structural diagram of a DC power supply reverse connection protection fuse according to the present invention.

[0015] Figure 3 This is an exploded view of a DC power supply reverse connection protection fuse according to this utility model.

[0016] In the diagram: 1-Insulating base, 2-Mounting screw hole, 3-Slot, 4-Protruding tongue, 5-Conductive clip, 6-Elastic clamp, 7-Connector, 8-Threaded hole, 9-Positioning mounting hole, 10-Positioning insertion hole, 11-Positioning screw, 12-Fuse, 13-Mounting contact, 14-Positioning groove, 15-Positioning block, 16-Limiting baffle, 17-Pole mark. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0018] In one embodiment, see [reference] Figures 1-3 A DC power supply reverse connection protection fuse includes an insulating base 1 with mounting screw holes 2. The insulating base 1 has slots 3 at both ends, and conductive clips 5 are installed in the slots 3. A protruding tongue 4 is fixedly connected to the top of the slots 3, and the protruding tongue 4 cooperates with the slots 3. An elastic clamp 6 made of a flexible metal plate is fixedly connected to the top of the conductive clips 5. A fuse 12 is disposed between the elastic clamps 6, and mounting contacts 13 are fixedly connected to both ends of the fuse 12. The mounting contacts 13 cooperate with the elastic clamps 6, thereby elastically clamping and fixing the mounting contacts 13. A positioning block 15 is fixedly connected to the top of the protruding tongue 4 and is disposed within the elastic clamps 6. The two sets of positioning blocks 15 are asymmetrically arranged. A positioning groove 14 is provided at the bottom of the mounting contacts 13, and the positioning groove 14 cooperates with the positioning block 15. A limit baffle 16 is fixedly connected to the side of the mounting contacts 13 closest to the fuse 12, and the limit baffle 16 cooperates with the elastic clamps 6.

[0019] This invention firstly achieves the fixed installation of the conductive clip 5 through the mutual cooperation of the tongue 4 and the slot 3, and achieves the elastic clamping and fixing of the mounting contact 13 through the setting of the elastic clamp 6. During the installation process, the operator can align the mounting contacts 13 at both ends of the fuse 12 with the two sets of elastic clamps 6 and press them down, so that the mounting contacts 13 are inserted between the elastic clamps 6. During this process, the limiting baffle 16, through its mutual cooperation with the elastic clamps 6, provides lateral positioning between the elastic clamps 6 and the mounting contacts 13. At this time, due to the asymmetrical arrangement of the two sets of positioning blocks 15, the two sets of positioning blocks 15 are elastically fixed. When the two ends of the fuse 12 are connected in reverse, the positioning grooves 14 and positioning blocks 15 in the two sets of mounting contacts 13 are aligned with each other. At this time, the mounting contacts 13 will be fully inserted into the elastic clamp 6, thus completing the installation of the fuse 12. Conversely, when the two ends of the fuse 12 are connected in reverse, the positioning grooves 14 and positioning blocks 15 in the two sets of mounting contacts 13 are misaligned. At this time, the mounting contacts 13 and positioning blocks 15 interfere with each other, and the mounting contacts 13 cannot be fully inserted into the elastic clamp 6, thereby avoiding the reverse connection of the fuse 12. At the same time, this utility model uses the mounting screw holes 2 to install and fix the equipment.

[0020] In one instance of this embodiment, please refer to Figures 1-3 The insulating base 1 has pole marks 17 at both ends of its outer wall. The present invention marks the positive and negative poles of the equipment by using pole marks 17, thereby avoiding reverse installation of the equipment.

[0021] In one instance of this embodiment, please refer to Figures 1-3 The conductive clip 5 is fixedly connected to a connector 7, and the present invention connects the circuit by setting the connector 7.

[0022] In one instance of this embodiment, please refer to Figures 1-3 The bottom of the tongue 4 is provided with a threaded hole 8, the bottom of the insulating base 1 is provided with a positioning mounting hole 9, and the bottom of the conductive clip 5 is provided with a positioning insertion hole 10. The positioning insertion hole 10 cooperates with the threaded hole 8 and the positioning mounting hole 9. A positioning screw 11 is installed in the positioning mounting hole 9. The positioning screw 11 passes through the positioning insertion hole 10 and is threadedly connected to the threaded hole 8.

[0023] This invention uses positioning screws 11 to position the conductive clips 5 in the slot 3, thereby preventing the conductive clips 5 from coming loose and causing equipment failure.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A DC power supply reverse connection protection fuse, comprising an insulating base, characterized in that, The insulating base has mounting screw holes, and slots at both ends. Conductive clips are installed in the slots, and a protrusion is fixedly connected to the top of the slot. The protrusion cooperates with the slot to clamp and fix the conductive clip. An elastic clamp made of a flexible metal plate is fixedly connected to the top of the conductive clip. A fuse is arranged between the elastic clamps, and mounting contacts are fixedly connected to both ends of the fuse. The mounting contacts cooperate with the elastic clamps to elastically clamp and fix the mounting contacts. A positioning block is fixedly connected to the top of the protrusion and is located inside the elastic clamp. The two sets of positioning blocks are asymmetrically arranged. A positioning groove is provided at the bottom of the mounting contact. The positioning groove cooperates with the positioning block. A limit baffle is fixedly connected to the side of the mounting contact near the fuse. The limit baffle cooperates with the elastic clamp to slide and position the elastic clamp and the mounting contact.

2. The DC power supply reverse connection protection fuse according to claim 1, characterized in that, The outer wall of the insulating base is marked with pole marks at both ends.

3. A DC power supply reverse connection protection fuse according to claim 1, characterized in that, A connector is fixedly connected to the conductive clip.

4. A DC power supply reverse connection protection fuse according to claim 1, characterized in that, The bottom of the protruding tongue is provided with a threaded hole, the bottom of the insulating base is provided with a positioning mounting hole, and the bottom of the conductive clip is provided with a positioning insertion hole. The positioning insertion hole, the threaded hole, and the positioning mounting hole cooperate with each other. A positioning screw is installed in the positioning mounting hole, and the positioning screw passes through the positioning insertion hole and is threaded into the threaded hole.

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