A short-circuit protection device for reverse connection of power supply port
By using a combination of guide sleeve, spring, slide bar, conductor and magnet in the power supply port, the circuit is disconnected by the change of magnetic field, which solves the problem of equipment damage caused by reverse connection of the power supply port, realizes short circuit protection of the power supply port, and ensures equipment safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN TRIPOD TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-26
AI Technical Summary
The problem of reverse connection of existing power supply ports causing damage to the internal circuits of electronic devices, especially irreversible damage such as electrolytic capacitor explosion, MOSFET source leakage breakdown, and IC chip logic disorder.
The circuit is disconnected by a protective assembly including a guide sleeve, spring, slide rod, conductor, first contact, second contact and magnet. It prevents reverse current by changing the magnetic field. The circuit is disconnected by using a protective resistor and magnetic attraction of the magnet.
It effectively prevents short circuits caused by reverse connection of the power supply port, protects the internal circuits of electronic equipment, avoids equipment damage, and ensures circuit safety and stability.
Smart Images
Figure CN224288782U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a protection device, and more particularly to a short-circuit protection device for reverse connection of power supply port, belonging to the field of short-circuit protection technology. Background Technology
[0002] The power supply port is the core interface for electronic devices to physically connect to an external power source and transmit electrical energy. Its function is to stably and safely introduce external power into the device's internal circuitry. A typical power supply port consists of positive and negative conductors, an insulating housing, contact terminals, and a protective structure. Common types include USB-C, DC round ports, and terminal blocks. Depending on the application scenario, its voltage carrying capacity can range from 5V (such as mobile phone charging ports) to 400V (such as electric vehicle charging interfaces).
[0003] Reverse connection of power supply ports is one of the most common and dangerous types of faults in electronic equipment. When the power supply polarity is accidentally reversed, the internal circuitry of the device will be subjected to reverse bias voltage, leading to irreversible damage such as electrolytic capacitor explosion, source-drain breakdown of MOSFETs, and logic disorder of IC chips. To address this, a short-circuit protection device for reverse connection of power supply ports is proposed. Utility Model Content
[0004] In view of this, the present invention provides a short-circuit protection device for reverse connection of power supply port to solve or alleviate one of the technical problems existing in the prior art, and at least provides a beneficial option.
[0005] The technical solution of this utility model embodiment is implemented as follows: a power supply port reverse connection short circuit protection device includes a main body component, and two protection components are symmetrically arranged inside the main body component. The protection components include a guide sleeve, a spring, a slide rod, a conductor, a first contact, a second contact, and a magnet.
[0006] A spring is fixedly connected to the inner wall of the guide sleeve. A sliding rod is fixedly connected to one end of the spring. The sliding rod is slidably connected to the inner wall of the guide sleeve. A conductor is fixedly connected to one end of the sliding rod. A first contact and a second contact are provided on one side of the conductor. A magnet is fixedly connected to one end of the conductor. After the two first wires are connected to the positive and negative terminals of the power supply port and energized, the two first connecting posts are connected through the wires to form a complete circuit. The protective resistor prevents the circuit from short-circuiting. At the same time, the first wires are wound around the bracket. After being energized, they generate magnetism and attract the magnet. If the positive and negative terminals are reversed, the direction of the magnetic field changes, and the magnet moves in the opposite direction, causing the second wire and the first wire to disconnect from the conductor, thus preventing the current from flowing backward through subsequent electrical equipment.
[0007] A further preferred embodiment: the main body component includes a housing, a top cover, and a support plate;
[0008] The top of the housing is fixedly connected to a top cover by bolts, and a support plate is fixedly connected to the inner side wall of the housing.
[0009] A further preferred embodiment: the two guide sleeves are symmetrically and fixedly connected to both sides of the support plate.
[0010] A further preferred embodiment: threaded sleeves are symmetrically fixedly connected to both sides of the support plate.
[0011] A further preferred embodiment: the inner wall of the threaded sleeve is threaded with a threaded post.
[0012] A further preferred embodiment: one end of the threaded post is fixedly connected to a bracket.
[0013] A further preferred embodiment: the outer side wall of the bracket is wound with a first wire, one end of the first wire extends through the housing to the outside, and one end of the first wire is fixedly connected to a first connecting post, which is fixedly connected to the inner side wall of the housing.
[0014] A further preferred embodiment: a second connecting post is fixedly connected to the inner sidewall of the housing, a second wire is fixedly connected to one end of the second connecting post, and one end of the second wire extends through the housing to the outside.
[0015] The present invention has the following advantages due to the adoption of the above technical solution:
[0016] I. This utility model connects two first connecting posts with a wire and installs a protective resistor therein. When energized, the wound first wire generates a magnetic field that attracts or pushes away the magnet, thereby disconnecting or connecting the power supply circuit, achieving the function of preventing reverse connection and protecting circuit safety.
[0017] Second, this utility model disconnects the power supply to the system by triggering the positive and negative protection devices, thus preventing the system from burning out due to short circuits.
[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1This is a structural diagram of the present invention;
[0021] Figure 2 This is a diagram showing the internal structure of the shell of this utility model;
[0022] Figure 3 This is a top view of the structure of this utility model;
[0023] Figure 4 This is a structural diagram of the internal structure of the guide sleeve of this utility model.
[0024] Reference numerals: 10, main component; 11, housing; 12, top cover; 13, support plate; 20, protective component; 21, guide sleeve; 22, spring; 23, slide rod; 24, conductor; 25, first contact; 26, second contact; 27, magnet; 28, threaded sleeve; 29, threaded post; 210, bracket; 211, first wire; 212, first connecting post; 213, second connecting post; 214, second wire; 215, protective resistor. Detailed Implementation
[0025] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.
[0026] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0027] like Figures 1-4 As shown, this utility model embodiment provides a power supply port reverse connection short circuit protection device, including a main body component 10. Two protection components 20 are symmetrically arranged inside the main body component 10. The protection component 20 includes a guide sleeve 21, a spring 22, a slide rod 23, a conductor 24, a first contact 25, a second contact 26, and a magnet 27.
[0028] A spring 22 is fixedly connected to the inner wall of the guide sleeve 21. A slide rod 23 is fixedly connected to one end of the spring 22. The slide rod 23 is slidably connected to the inner wall of the guide sleeve 21. A conductor 24 is fixedly connected to one end of the slide rod 23. A first contact 25 and a second contact 26 are provided on one side of the conductor 24. A magnet 27 is fixedly connected to one end of the conductor 24.
[0029] In this embodiment, specifically: the main body component 10 includes a shell 11, a top cover 12 and a support plate 13. After the two first wires 211 are connected to the positive and negative terminals of the power supply port and energized, the two first connecting posts 212 are connected through the wires to form a complete circuit. The protection resistor 215 prevents the circuit from short-circuiting. At the same time, the first wires 211 are wound around the bracket 210. After being energized, they generate magnetic attraction to the magnet 27. If the positive and negative terminals are reversed, the direction of the magnetic field changes and the magnet 27 moves in the opposite direction, causing the second wire 214 and the first wire 211 to disconnect from the conductor 24, thus preventing the current from flowing in the opposite direction through the subsequent electrical equipment.
[0030] A top cover 12 is fixedly connected to the top of the housing 11 by bolts, and a support plate 13 is fixedly connected to the inner side wall of the housing 11. The top cover 12 is used to close the housing 11.
[0031] In this embodiment, specifically: two guide sleeves 21 are symmetrically fixedly connected to both sides of the support plate 13, and the guide sleeves 21 are used to control the moving direction and stroke of the slide rod 23.
[0032] In this embodiment, specifically: threaded sleeves 28 are symmetrically fixedly connected to both sides of the support plate 13, and the threaded sleeves 28 are used to fix the threaded post 29.
[0033] In this embodiment, specifically: the inner side wall of the threaded sleeve 28 is threadedly connected to a threaded post 29, and the threaded post 29 is fixed by thread engagement, which facilitates the disassembly of the bracket 210 and the change of the coil winding method.
[0034] In this embodiment, specifically: one end of the threaded post 29 is fixedly connected to a bracket 210, which is made of iron material and can increase the magnetism of the external coil.
[0035] In this embodiment, specifically: a first wire 211 is wound around the outer wall of the bracket 210, one end of the first wire 211 extends through the housing 11 to the outside, and one end of the first wire 211 is fixedly connected to a first connecting post 212. The first connecting post 212 is fixedly connected to the inner wall of the housing 11. The first wire 211 is spirally wound around the iron bracket 210 to form a set of electromagnet structures. After being energized, the electromagnet structures can attract magnets 27.
[0036] In this embodiment, specifically: a second connecting post 213 is fixedly connected to the inner side wall of the housing 11, a second wire 214 is fixedly connected to one end of the second connecting post 213, one end of the second wire 214 extends through the housing 11 to the outside, and one end of the second wire 214 is connected to various electrical components.
[0037] When this utility model is in operation: after the two first wires 211 are connected to the positive and negative terminals of the power supply port respectively and energized, the two first connecting posts 212 are connected through the wires to form a complete circuit. The protection resistor 215 prevents the circuit from short-circuiting. At the same time, the first wires 211 are wound around the bracket 210. After being energized, they generate magnetic attraction to the magnet 27. If the positive and negative terminals are reversed, the direction of the magnetic field changes and the magnet 27 moves in the opposite direction, causing the second wire 214 and the first wire 211 to disconnect from the conductor 24. This prevents the current from flowing backward through subsequent electrical equipment and causing damage to components such as capacitors. By triggering the positive and negative protection device, the power supply to the system is disconnected to prevent the system from burning out due to short circuit.
[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A short-circuit protection device for reverse connection of power supply port, comprising a main component (10), characterized in that: The main body component (10) has two protective components (20) symmetrically arranged inside. The protective components (20) include a guide sleeve (21), a spring (22), a slide rod (23), a conductor (24), a first contact (25), a second contact (26), and a magnet (27). A spring (22) is fixedly connected to the inner wall of the guide sleeve (21). A slide rod (23) is fixedly connected to one end of the spring (22). The slide rod (23) is slidably connected to the inner wall of the guide sleeve (21). A conductor (24) is fixedly connected to one end of the slide rod (23). A first contact (25) and a second contact (26) are provided on one side of the conductor (24). A magnet (27) is fixedly connected to one end of the conductor (24).
2. The short-circuit protection device for reverse connection of power supply port according to claim 1, characterized in that: The main component (10) includes a shell (11), a top cover (12), and a support plate (13); The top of the housing (11) is fixedly connected to a top cover (12) by bolts, and a support plate (13) is fixedly connected to the inner side wall of the housing (11).
3. A short-circuit protection device for reverse connection of power supply port according to claim 2, characterized in that: The two guide sleeves (21) are symmetrically fixedly connected to both sides of the support plate (13).
4. A short-circuit protection device for reverse connection of power supply port according to claim 2, characterized in that: Threaded sleeves (28) are symmetrically fixedly connected to both sides of the support plate (13).
5. A short-circuit protection device for reverse connection of power supply port according to claim 4, characterized in that: The inner wall of the threaded sleeve (28) is threaded with a threaded post (29).
6. A short-circuit protection device for reverse connection of power supply port according to claim 5, characterized in that: One end of the threaded post (29) is fixedly connected to a bracket (210).
7. A short-circuit protection device for reverse connection of power supply port according to claim 6, characterized in that: The outer side wall of the bracket (210) is wound with a first wire (211), one end of the first wire (211) extends through the shell (11) to the outside, and one end of the first wire (211) is fixedly connected to a first connecting post (212), which is fixedly connected to the inner side wall of the shell (11).
8. A short-circuit protection device for reverse connection of power supply port according to claim 2, characterized in that: The inner wall of the housing (11) is fixedly connected to a second connecting post (213), and one end of the second connecting post (213) is fixedly connected to a second wire (214). One end of the second wire (214) extends through the housing (11) to the outside.