CN-224233331-U - Short-circuit prevention circuit device

Abstract

The utility model provides a short-circuit prevention circuit device which comprises a main body assembly, wherein the main body assembly comprises a circuit board, an HDMI (high definition multimedia interface), a TVS (transient voltage suppressor) diode, a self-recovery fuse, a temperature sensor and a microcontroller, and the HDMI, the TVS diode, the self-recovery fuse, the temperature sensor and the microcontroller are all arranged on the upper surface of the circuit board. According to the self-recovery fuse, when the self-recovery fuse is in short circuit, the current path is cut off through the rapid increase resistor, the damage of abnormal current to equipment is timely limited, the TVS diode rapidly absorbs surge voltage at the moment of short circuit at nanosecond level, the voltage is clamped in a safe range, the power supply and signal pins of the HDMI interface are effectively protected, the short circuit risk caused by mistaken insertion of a Type-C wire into the HDMI interface is reduced, faults such as element burning and chip breakdown can be reduced, the safety and reliability of the equipment are remarkably improved, the maintenance cost is reduced, and meanwhile, the heat in the device can be rapidly discharged by being matched with the heat dissipation assembly.

Inventors

• WANG HAIJUN

Assignees

• 深圳市鼎元智能科技有限公司

Dates

Publication Date

20260512

Application Date

20250707

Claims (8)

1. 1. The short-circuit prevention circuit device comprises a main body assembly (101), and is characterized in that the main body assembly (101) comprises a circuit board (11), an HDMI (high-definition multimedia interface) interface (12), a TVS (transient voltage suppressor) diode (13), a self-recovery fuse (14), a temperature sensor (15) and a microcontroller (16); The HDMI interface (12), the TVS diode (13), the self-recovery fuse (14), the temperature sensor (15) and the microcontroller (16) are all arranged on the upper surface of the circuit board (11), Pins of the HDMI interface (12) are sequentially connected in series with the self-recovery fuse (14) and the TVS diode (13) through the circuit board (11); a heat dissipation assembly (301) is arranged above the circuit board (11), and the heat dissipation assembly (301) comprises a protective cover (31), two side plates (32), a through groove (33) and a heat dissipation fan (35); The two side plates (32) are symmetrically and fixedly connected to the lower surface of the protective cover (31), the through grooves (33) are equidistantly formed in the side plates (32), and the heat dissipation fan (35) is mounted in the protective cover (31).
2. 2. The short-circuit prevention circuit device according to claim 1, wherein the lower surfaces of the two side plates (32) are symmetrically attached to the upper surface of the circuit board (11), and the lower surfaces of the side plates (32) are symmetrically provided with connecting holes (37).
3. 3. A short-circuit prevention circuit arrangement according to claim 2, characterized in that the connecting hole (37) is internally provided with a connecting screw (36).
4. 4. A short circuit prevention circuit device according to claim 3, wherein the upper surface of the circuit board (11) is symmetrically provided with mounting holes (17), and the positions of the mounting holes (17) correspond to the positions of the connecting holes (37).
5. 5. A short-circuit prevention circuit arrangement according to claim 4, characterized in that the connecting screw (36) is located inside the mounting hole (17).
6. 6. The short-circuit prevention circuit device according to claim 1, wherein the upper surface of the protective cover (31) is fixedly connected with a protective net (34).
7. 7. A short-circuit prevention circuit device according to claim 6, wherein the position of the protection net (34) corresponds to the position of the heat radiation fan (35).
8. 8. A short circuit prevention circuit device according to claim 1, wherein said TVS diode (13), self-healing fuse (14), temperature sensor (15) and microcontroller (16) are all located under said protective cover (31).

Description

Short-circuit prevention circuit device Technical Field The utility model relates to a circuit device, in particular to a short-circuit prevention circuit device, and belongs to the technical field of short-circuit prevention devices. Background The pin definitions and functions of the HDMI interface and Type-C interface are quite different. The HDMI interface is mainly used for transmitting high-definition video and audio signals, and the golden finger corresponds to different pins such as signal channels, power sources, ground wires and the like. The Type-C interface is more general and can be used for various functions such as charging, data transmission and video output, when the Type-C interface is inserted into the HDMI interface, certain pins of the HDMI interface can form unexpected circuit connection through pins of the Type-C line, and if the connection leads to conduction of a power supply pin and a signal pin or a ground wire and other pins which are not required to be directly connected, short circuit can be caused. If the HDMI interface is misplaced to cause short circuit due to the Type-C interface, direct impact is firstly caused on related hardware equipment. Abnormal current generated by short circuit may burn circuit elements in the HDMI interface, and even further affects a main board or other connecting components, so that the device cannot work normally, and failures such as a black screen, no signal output and the like occur. In addition, short circuits can also present a safety hazard. The abnormal current may damage equipment, may cause dangerous conditions such as overheat, smoke and even fire, and threatens the personal safety and property safety of users, and therefore, the short circuit prevention circuit device is provided. Disclosure of utility model In view of the foregoing, the present utility model provides an anti-short circuit device to solve or alleviate the technical problems in the prior art, and at least provides an advantageous choice. The technical scheme of the embodiment of the utility model is realized in that the short-circuit prevention circuit device comprises a main body component, wherein the main body component comprises a circuit board, an HDMI interface, a TVS diode, a self-recovery fuse, a temperature sensor and a microcontroller; The HDMI interface, TVS diode, self-recovery fuse, temperature sensor and microcontroller are all arranged on the upper surface of the circuit board, Pins of the HDMI interface are sequentially connected with a self-recovery fuse and a parallel TVS diode in series through a circuit board; A heat dissipation assembly is arranged above the circuit board and comprises a protective cover, two side plates, a through groove and a heat dissipation fan; The two side plates are symmetrically and fixedly connected to the lower surface of the protective cover, the through grooves are formed in the side plates at equal intervals, and the heat dissipation fan is arranged in the protective cover. Further preferably, the lower surfaces of the two side plates are symmetrically attached to the upper surface of the circuit board, and the lower surfaces of the side plates are symmetrically provided with connecting holes. Further preferably, a connection screw is provided in the connection hole. Further preferably, mounting holes are symmetrically formed in the upper surface of the circuit board, and the positions of the mounting holes correspond to the positions of the connecting holes. Further preferably, the connection screw is located inside the mounting hole. Further preferably, the upper surface of the protective cover is fixedly connected with a protective net. Further preferably, the position of the protection net corresponds to the position of the heat dissipation fan. Further preferably, the TVS diode, the self-healing fuse, the temperature sensor and the microcontroller are all located below the protective cover. By adopting the technical scheme, the embodiment of the utility model has the following advantages: According to the utility model, short-circuit protection is realized through the cooperation of the self-recovery fuse and the TVS diode, when in short circuit, the self-recovery fuse cuts off a current path through quickly increasing a resistor, so that the damage of abnormal current to equipment is timely limited, the equipment can be automatically recovered after the fault is eliminated without manual replacement, the TVS diode quickly absorbs surge voltage at the moment of short circuit, clamps the voltage in a safe range, effectively protects power supply and signal pins of an HDMI interface, reduces the short-circuit risk caused by the fact that a Type-C wire is mistakenly inserted into the HDMI interface through the cooperation of the self-recovery fuse and the TVS diode, can also reduce the faults such as element burnout, chip breakdown and the like, obviously improves the safety and reliability of the equipment, prolongs