Power supply device with short circuit prevention mechanism

Abstract

The utility model discloses a power supply device with a short circuit prevention mechanism, which comprises a seat part and a short circuit protector, and the short circuit protector comprises the short circuit prevention mechanism and an electromagnet. The short circuit prevention mechanism comprises a telescopic fuse, an insulating rod, a compression spring and a magnet, the telescopic fuse is arranged beside the sliding cavity, the head of the telescopic end of the telescopic fuse enters the sliding cavity, and a circuit between the left terminal and the right terminal is connected to the telescopic fuse; the insulating rod is divided into a thick section and a thin section, the thin section can press the pressing key after penetrating through the fourth through hole and the second through hole, the thick section enters the sliding cavity, and the side portion of the thick section is provided with an annular groove matched with the telescopic end. One end of the compression spring abuts against the edge of the fourth through hole, and the other end of the compression spring abuts against a step between the thick section and the thin section; the magnet is arranged in the sliding cavity and fixedly connected with the thick section, and the magnetic pole direction of the magnet and the electrified electromagnet form a mutual exclusion structure. The utility model can prevent the processor from being burnt out by large current.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, specifically to a power supply device with a short-circuit protection mechanism. Background Technology

[0002] The power supply device is designed to operate in parallel through a two-wire bus. It uses a microcontroller as its core, stores field programming information in NV-RAM, and can achieve remote connection through an RS-485 serial port. It can realize various linkage control logics.

[0003] Traditional power supply devices supply power to alarms and fire-fighting equipment via remote control.

[0004] Traditional power supply devices use relays to cut off power when short circuits are prevented. When a large current flows through the circuit, the controller controls the relay to cut off the power. However, due to circuit failures in the control system, the relay cannot be controlled to work, causing the processor to burn out and resulting in great losses.

[0005] In view of this, it is necessary to improve the existing power supply equipment. Utility Model Content

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a power supply device with a short-circuit protection mechanism. The purpose of this power supply device is to enable instantaneous power disconnection through physical power loss, thereby preventing damage to the processor.

[0007] To solve the above-mentioned technical problems, the present invention achieves this through the following solution: The present invention provides a power supply device with a short-circuit protection mechanism, comprising a base and a short-circuit protector detachably connected to the base. The base is a U-shaped structure with a U-shaped cavity inside. A left terminal strip assembly is provided in the left cavity of the base, and a right terminal strip assembly is provided in the right cavity. A switch is provided in the bottom cavity of the base. The switch has two spaced terminals, wherein the first terminal is electrically connected to the left terminal strip assembly, and the second terminal faces a first through hole. A switching circuit is provided between the first and second terminals. The switch has a pressure key that, when pressed, turns on the switching circuit, and the pressure key faces a second through hole.

[0008] The bottom surface of the socket end of the seat is also provided with a third through hole;

[0009] The short-circuit protector has a left terminal, a right terminal and a fourth through hole. Inside it is a rechargeable battery, a sliding cavity and a short-circuit protection mechanism located in the sliding cavity. The left terminal passes through the first through hole and can be electrically connected to the second terminal block by contact. The right terminal passes through the third through hole and can be electrically connected to the right terminal strip assembly by contact.

[0010] An electromagnet is fixed to one end of the sliding cavity away from the fourth through hole;

[0011] The short-circuit protection mechanism includes:

[0012] A telescopic fuse is located next to the sliding cavity, with the head of its telescopic end entering the sliding cavity, and the circuit between the left and right terminals is connected to the telescopic fuse.

[0013] An insulating rod, which is divided into a thick section and a thin section, the thin section passes through the fourth through hole and the second through hole and can press the key, the thick section enters the sliding cavity, and its side has an annular groove that matches the telescopic end;

[0014] A compression spring is fitted onto the thin segment, with one end abutting against the edge of the fourth through hole and the other end abutting against the step between the thick segment and the thin segment;

[0015] A magnet is placed in the sliding cavity and fixed to the thick section, and its magnetic pole direction forms a repulsive structure with the electromagnet after it is energized.

[0016] Furthermore, the electromagnet includes a magnetic core and a conductive winding wound around the magnetic core.

[0017] Furthermore, the magnetic core includes one of an iron core, a soft iron column, or a silicon steel column.

[0018] Furthermore, the circuit connection between the electromagnet and the rechargeable battery is controlled by a control key.

[0019] Furthermore, the housing of the short-circuit protector is provided with a window structure, and the installation slot of the telescopic fuse is located inside the window structure.

[0020] Furthermore, the short-circuit protector is plugged into the base and then fastened.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. The power supply device of this utility model is equipped with a short-circuit protection mechanism. The short-circuit protection mechanism uses a telescopic fuse to lock the insulating rod so that the circuit can be conducted. When the current is too large, the fuse melts and the telescopic end retracts. The insulating rod is pushed up by the spring, so that the insulating rod is released from the pressure key, thereby physically cutting off the power and preventing the large current from burning out the processor.

[0023] 2. The power supply device of this utility model is also equipped with a structure for quickly controlling the movement of the insulating rod towards the key. That is, by energizing the electromagnet, a repulsive force is formed between the electromagnet and the magnet at the end of the insulating rod, thereby causing the magnet to drive the insulating rod to move towards the key until the replaced telescopic fuse is stuck in the annular groove. This utility model is easy to operate. Attached Figure Description

[0024] Figure 1 This is a diagram showing the internal structure of the power supply device of this utility model.

[0025] Figure 2 This is a structural diagram of the short-circuit protection mechanism of this utility model.

[0026] The following components are labeled in the attached diagram: 1. Base; 2. Insulating rod; 4. Compression spring; 5. Switch; 6. First terminal; 7. Second terminal; 8. Right terminal; 9. Right terminal strip assembly; 10. Rechargeable battery; 11. Short circuit protector; 12. Limit screw; 13. Conductive winding; 14. Magnetic core; 15. Slide cavity; 16. Magnet; 17. Telescopic fuse; 18. Left terminal; 19. Annular groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Obviously, the embodiments described in this utility model 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.

[0028] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] Example 1: The specific structure of this utility model is as follows:

[0030] Please refer to the appendix. Figure 1-2This utility model discloses a power supply device with a short-circuit protection mechanism, comprising a base 1 and a short-circuit protector 11 detachably connected to the base 1. The base 1 is a U-shaped structure with a U-shaped cavity inside. A left terminal strip assembly 3 is provided in the left cavity of the base 1, and a right terminal strip assembly 9 is provided in the right cavity. A switch 5 is provided in the bottom cavity of the base 1. The switch 5 has two spaced terminals, wherein the first terminal 6 is electrically connected to the left terminal strip assembly 3, and the second terminal 7 is directly opposite a first through hole. A switching circuit is provided between the first terminal 6 and the second terminal 7. The switch 5 is provided with a pressure key that conducts the switching circuit when pressed, and the pressure key is directly opposite a second through hole. The bottom surface of the socket end of the base 1 is also provided with a third through hole. The left terminal strip of the left terminal strip assembly 3 is fixed by a left set screw, one end of which extends to the first terminal 6 and is welded to the first terminal 6. The left terminal strip has a round hole for a rod-shaped body to pass through. The right terminal strip of the right terminal strip assembly 9 is fixed by a right set screw, and one end of it extends to the third through hole. A through hole is provided at the end of the right terminal strip, and the through hole is opposite to the third through hole.

[0031] The short-circuit protector 11 has a left terminal 18, a right terminal 8, and a fourth through hole at its insertion end. The short-circuit protector 11 contains a rechargeable battery 10, a sliding cavity 15, and a short-circuit protection mechanism located within the sliding cavity. The left terminal 18 passes through the first through hole and can be electrically connected to the second terminal 7 through contact. The right terminal 8 passes through the third through hole and can be electrically connected to the right terminal strip assembly 9 through contact.

[0032] An electromagnet is fixed to one end of the sliding cavity away from the fourth through hole; the electromagnet includes a magnetic core 14 and a conductive winding 13 wound around the magnetic core 14. The magnetic core 14 includes one of an iron core, a soft iron column, or a silicon steel column. In this embodiment, a soft iron column or a silicon steel column is preferred. After the conductive winding 13 is de-energized, the soft iron column or silicon steel column can be quickly demagnetized to avoid being attracted to the magnet 16.

[0033] The short-circuit protection mechanism includes:

[0034] A telescopic fuse 17 is located next to the sliding cavity, with its telescopic head entering the sliding cavity. The circuit between the left terminal 18 and the right terminal 8 is connected to the telescopic fuse 17. The telescopic fuse 17 has a telescopic head at the outer end of the fuse section. After the fuse section melts, the space will shrink, causing the telescopic head to retract.

[0035] The insulating rod 2 is divided into a thick section and a thin section. The thin section passes through the fourth through hole and the second through hole and can press against the key. The thick section enters the sliding cavity and has an annular groove 19 on its side that cooperates with the telescopic end. When the insulating rod 2 is pressed against the key, the telescopic head of the telescopic fuse 17 is stuck in the annular groove 19 to prevent the insulating rod 2 from moving upward. When the telescopic fuse 17 is blown by a large current, the telescopic head retracts, and the insulating rod 2 can move in the sliding cavity.

[0036] Compression spring 4 is sleeved on the thin segment, with one end abutting the edge of the fourth through hole and the other end abutting the step between the thick segment and the thin segment. After the insulating rod 2 is not stuck, it is pushed upward by compression spring 4.

[0037] Magnet 16 is located in the sliding cavity and fixed to the thick section. Its magnetic pole direction forms a repulsive structure with the electromagnet after it is energized. When the telescopic fuse 17 is replaced and the electromagnet is energized again, the electromagnet generates a magnetic field, which repels magnet 16. After being repelled, magnet 16 moves towards the fourth through hole, thereby driving the lower end of insulating rod 2 downward until the lower end of insulating rod 2 presses against the key. At this time, the telescopic head of the replaced telescopic fuse 17 is stuck in the annular groove 19, the electromagnet is de-energized, and the insulating rod 2 is confined. When the magnetic core 14 is an iron core, after the electromagnet is de-energized, the attraction between the iron core and magnet 16 is less than the clamping force of the telescopic head of telescopic fuse 17 when it is stuck into the annular groove.

[0038] To facilitate easier control of the electromagnet's energization, this invention employs a structure where the circuit between the electromagnet and the rechargeable battery 10 is controlled by a control key. The control key is similar in structure to a pressure key; pressing the control key energizes the electromagnet, and releasing it de-energizes it.

[0039] The short-circuit protector 11 has a window structure in its housing, within which is the mounting slot for the telescopic fuse 17. The window structure facilitates the replacement of the telescopic fuse 17.

[0040] The short-circuit protector 11 is inserted into the base 1 and then fastened. The base 1 has two retaining plates at both ends, and the short-circuit protector 11 has retaining slots on both sides. When the short-circuit protector 11 is inserted into the U-shaped structure slot of the short-circuit protector 11, the two retaining plates will be engaged in the retaining slots to fix the short-circuit protector 11.

[0041] Example 2:

[0042] like Figure 1 As shown, the short-circuit protector 11 has a threaded hole, which is aligned with the sliding cavity. A limit screw 12 is screwed into the threaded hole 12. After the limit screw 12 is opened, the electromagnet, electromagnet 16, insulating rod 2, and compression spring 4 can be removed.

[0043] In summary,

[0044] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A power supply device with a short-circuit protection mechanism, comprising a base (1) and a short-circuit protector (11) detachably connected to the base (1), wherein the base (1) is a U-shaped structure with a U-shaped cavity inside, and a left terminal strip assembly (3) is provided in the left cavity of the base (1) and a right terminal strip assembly (9) is provided in the right cavity, characterized in that, The bottom cavity of the seat (1) is provided with a switch (5), the switch (5) is provided with two spaced terminals, wherein the first terminal (6) is electrically connected to the left terminal strip assembly (3), the second terminal (7) is directly opposite a first through hole, a switch circuit is provided between the first terminal (6) and the second terminal (7), the switch (5) is provided with a pressure key that turns on the switch circuit when pressed, and the pressure key is directly opposite a second through hole; The bottom surface of the socket end of the seat (1) is also provided with a third through hole; The short-circuit protector (11) has a left terminal (18), a right terminal (8) and a fourth through hole at its plug end. Inside it are a rechargeable battery (10), a sliding cavity (15) and a short-circuit protection mechanism located in the sliding cavity. The left terminal (18) can be electrically connected to the second terminal (7) by contact through the first through hole, and the right terminal (8) can be electrically connected to the right terminal strip assembly (9) by contact through the third through hole. An electromagnet is fixed to one end of the sliding cavity away from the fourth through hole; The short-circuit protection mechanism includes: A telescopic fuse (17) is provided next to the sliding cavity, with the head of its telescopic end entering the sliding cavity, and the circuit between the left terminal (18) and the right terminal (8) is connected to the telescopic fuse (17). Insulating rod (2), which is divided into a thick section and a thin section. The thin section passes through the fourth through hole and the second through hole and can press the key. The thick section enters the sliding cavity and has an annular groove (19) on its side that cooperates with the telescopic end. A compression spring (4) is fitted onto the thin section, with one end abutting against the edge of the fourth through hole and the other end abutting against the step between the thick section and the thin section; A magnet (16) is placed in the sliding cavity and fixed to the thick section, and its magnetic pole direction forms a repulsive structure with the electromagnet after being energized.

2. A power supply device with a short-circuit protection mechanism according to claim 1, characterized in that, The electromagnet includes a magnetic core (14) and a conductive winding (13) wound around the magnetic core (14).

3. A power supply device with a short-circuit protection mechanism according to claim 2, characterized in that, The magnetic core (14) includes one of the following: iron core, soft iron column, and silicon steel column.

4. A power supply device with a short-circuit protection mechanism according to claim 1, characterized in that, The circuit between the electromagnet and the rechargeable battery (10) is controlled by a control key.

5. A power supply device with a short-circuit protection mechanism according to claim 1, characterized in that, The short-circuit protector (11) has a window structure in its housing, and the window structure contains the mounting slot for the telescopic fuse (17).

6. A power supply device with a short-circuit protection mechanism according to claim 1, characterized in that, The short-circuit protector (11) is plugged into the base (1) and then fastened.

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