CN219224920U

CN219224920U - DC shunt

Info

Publication number: CN219224920U
Application number: CN202320676605.7U
Authority: CN
Inventors: 张伟
Original assignee: Hefei Yirui Communication Technology Co Ltd
Current assignee: Hefei Yirui Communication Technology Co Ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-06-20
Anticipated expiration: 2033-03-30

Abstract

The utility model discloses a direct current shunt, comprising: the direct-current power supply input interface is used for externally connecting a power supply; n overcurrent protection circuits, wherein N is a positive integer; the N direct current power supply output interfaces are in one-to-one correspondence with the N overcurrent protection circuits, each direct current power supply output interface is connected to the direct current power supply input interface through the corresponding overcurrent protection circuit, and the direct current power supply output interface is used for externally connecting electric equipment. The direct current shunt is provided with a plurality of direct current power output interfaces, can supply power to a plurality of electric equipment at the same time, and provides overcurrent protection for the electric equipment, so that the conditions of short circuit and burning out of a circuit board are prevented. The input interface and the output interface both adopt cage spring connecting terminals, so that the hidden danger that the anode and the cathode collide with each other or touch other devices under the condition of free scattering of crocodile pliers is solved.

Description

DC shunt

Technical Field

The utility model relates to the technical field of current dividers, in particular to a direct current divider.

Background

In the related art, generally, one power supply device can only be used by one electric device, and the utilization rate of the power supply device is low. And the power supply equipment can not provide effective overcurrent and short-circuit protection for the electric equipment, and the circuit board is easy to burn out. The crocodile pliers for wiring in the power supply equipment are partially exposed, so that the outer insulating skin is easy to damage, and the contact short circuit of the anode and the cathode is caused.

Disclosure of Invention

An object of the present utility model is to provide a dc shunt, which has a plurality of dc power output interfaces, and is capable of supplying power to a plurality of electric devices at the same time, and providing overcurrent protection for the electric devices, so as to prevent the occurrence of short circuit and burnout of a circuit board. The input interface and the output interface both adopt cage spring connecting terminals, so that the hidden danger that the anode and the cathode collide with each other or touch other devices under the condition of free scattering of crocodile pliers is solved.

To achieve the above object, an embodiment of a first aspect of the present utility model provides a dc shunt, including: the direct-current power supply input interface is used for externally connecting a power supply; n overcurrent protection circuits, wherein N is a positive integer; the direct current power supply comprises N direct current power supply output interfaces, N direct current power supply output interfaces and N overcurrent protection circuits, wherein the N direct current power supply output interfaces are in one-to-one correspondence with the N overcurrent protection circuits, each direct current power supply output interface is connected to the direct current power supply input interface through the corresponding overcurrent protection circuit, and the direct current power supply output interface is used for externally connecting electric equipment.

In addition, the dc shunt according to the above embodiment of the present utility model may further have the following additional technical features:

according to one embodiment of the present utility model, the overcurrent protection circuit includes a self-recovery fuse connected between the positive electrode of the dc power input interface and the positive electrode of the corresponding dc power output interface, wherein the negative electrodes of the N dc power output interfaces are all connected to the negative electrode of the dc power input interface.

According to one embodiment of the present utility model, the overcurrent protection circuit further includes an indicator lamp, a first end of the indicator lamp is connected to the positive electrode of the corresponding dc power output interface and connected to the positive electrode of the dc power input interface through the corresponding self-restoring fuse, and a second end of the indicator lamp is connected to the negative electrode of the dc power input interface and the negative electrode of the corresponding dc power output interface, respectively.

According to one embodiment of the utility model, the indicator light is a light emitting diode, an anode of the light emitting diode is used as a first end of the indicator light, and a cathode of the light emitting diode is used as a second end of the indicator light.

According to one embodiment of the present utility model, the dc shunt further includes a circuit board, and the dc power input interface, the N overcurrent protection circuits, and the N dc power output interfaces are all disposed on the circuit board.

According to one embodiment of the utility model, the direct current power input interface adopts a two-core direct insertion type cage spring wiring terminal.

According to one embodiment of the utility model, the direct current power supply output interface adopts a two-core direct insertion type cage spring wiring terminal.

According to one embodiment of the utility model, the direct current power input interface is used for being connected with a lead wire with a first preset caliber, and the first preset caliber is smaller than or equal to 1.5 square millimeters.

According to one embodiment of the utility model, the direct current power output interface is used for being connected with a lead wire with a second preset caliber, and the second preset caliber is smaller than or equal to 0.75 square millimeter.

According to an embodiment of the present utility model, the number of the over-current protection circuits and the number of the dc power output interfaces are integers greater than or equal to 3.

The direct current shunt provided by the embodiment of the utility model comprises a direct current power supply input interface, a plurality of overcurrent protection circuits and a plurality of direct current power supply output interfaces, wherein each direct current power supply output interface corresponds to each overcurrent protection circuit one by one, and when power supply equipment is insufficient, one power supply equipment can provide at least three electric equipment for use. The overcurrent protection circuit provides overcurrent protection for electric equipment and prevents conditions such as short circuit, circuit board burnout and the like. The overcurrent protection circuit adopts a self-recovery fuse, the circuit can recover by itself after short-circuit protection, and the LED is also provided for indicating the state of the circuit. The direct current power output interface and the direct current power input interface both adopt two-core direct-insert cage-type spring wiring terminals, so that the hidden danger that the anode and the cathode collide or touch other devices under the condition of free scattering of crocodile pliers is solved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic diagram of a DC shunt according to one embodiment of the utility model;

FIG. 2 is a schematic circuit diagram of a DC shunt according to one embodiment of the utility model;

FIG. 3 is a schematic diagram of a DC shunt junction according to one embodiment of the utility model;

fig. 4 is a schematic view of a cage spring terminal according to one embodiment of the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

The dc shunt according to the embodiment of the present utility model will be described in detail with reference to the drawings.

Fig. 1 is a schematic diagram of a dc shunt according to an embodiment of the present utility model.

In one embodiment of the present utility model, as shown in fig. 1, a dc shunt 100 includes: the direct-current power supply input interface 10 is used for externally connecting a power supply; n overcurrent protection circuits 20, wherein N is a positive integer; the N direct current power supply output interfaces 30, the N direct current power supply output interfaces 30 are in one-to-one correspondence with the N overcurrent protection circuits 20, each direct current power supply output interface 30 is connected to the direct current power supply input interface 10 through the corresponding overcurrent protection circuit 20, and the direct current power supply output interfaces 30 are used for externally connecting electric equipment.

Specifically, one power supply device of the conventional direct current power supply device can only supply power to one electric device. The dc shunt 100 of the present utility model includes a dc power input interface 10 and a plurality of dc power output interfaces 30, which can supply power to a plurality of electrical devices simultaneously. The dc shunt 100 of the present utility model further includes a plurality of over-current protection circuits 20, where the dc power output interfaces 30 are in one-to-one correspondence with the over-current protection circuits 20, and each dc power output interface 30 is connected to the dc power input interface 10 through the over-current protection circuit 20.

Further specifically, the dc power input interface 10 is externally connected with a power supply, the dc power output interface 30 is externally connected with electric equipment, and the overcurrent protection circuit 20 provides overcurrent protection for the electric equipment externally connected with the corresponding dc power output interface 30, so as to prevent short circuit, burnout of a circuit board and other conditions.

In one embodiment of the present utility model, the number of the over-current protection circuits 20 and the number of the dc power output interfaces 30 are integers greater than or equal to 3.

Specifically, the dc shunt 100 of the present utility model may include N dc power output interfaces 30, where N is an integer greater than or equal to 3, and the following description of the present utility model will take N equal to 3 as an example. As shown in the circuit diagram of fig. 2, the dc shunt 100 has a dc power input interface 10, positive electrode is vin+, negative electrode is Vin-, and three dc power output interfaces 30, positive and negative electrodes are Vout1+, vout1-, vout2+, vout2-, vout3+, and Vout3-, respectively.

In one embodiment of the present utility model, as shown in fig. 2, the overcurrent protection circuit 20 includes a self-restoring fuse (FU 1, FU2, FU 3) connected between the positive electrode of the dc power input interface 10 and the positive electrode of the corresponding dc power output interface 30, wherein the negative electrodes of the N dc power output interfaces 30 are all connected to the negative electrode of the dc power input interface 10.

Specifically, the traditional fuse overcurrent protection can only be protected once, and the fuse needs to be replaced. The self-restoring fuse is made up by using high-molecular organic polymer through a special preparation process. The utility model adopts the self-recovery fuse as an overcurrent protection circuit element, and the self-recovery fuse not only has the overheat protection function, but also has the automatic recovery function. The circuit can recover by itself after the circuit is short-circuited.

More specifically, the self-recovery fuses are connected between the positive electrode of the dc power input interface 10 and the positive electrode of the corresponding dc power output interface 30, each dc power output interface 30 corresponds to one self-recovery fuse, and the negative electrode of the dc power output interface 30 is connected to the negative electrode of the dc power input interface 10. When the circuit is short-circuited, the self-recovery fuse is broken to protect the circuit, and the self-recovery fuse is recovered to the original state after short-circuit protection without replacing the fuse.

In one embodiment of the present utility model, as shown in fig. 2, the overcurrent protection circuit 20 further includes indicator lamps (L1, L2, L3), wherein a first end of the indicator lamps is connected to the positive electrode of the corresponding dc power output interface 30 and is connected to the positive electrode of the dc power input interface 10 through the corresponding self-restoring fuses, and a second end of the indicator lamps is connected to the negative electrode of the dc power input interface 10 and the negative electrode of the corresponding dc power output interface 30, respectively.

Specifically, the overcurrent protection circuit 20 of the present utility model further includes an indicator lamp for indicating the status of the self-restoring fuse, that is, indicating whether the corresponding dc power output interface 30 is shorted. The first end of the indicator light is connected between the self-restoring fuse and the positive electrode of the corresponding direct current power output interface 30, and the second end of the indicator light is connected between the negative electrode of the direct current power input interface 10 and the negative electrode of the corresponding direct current power output interface 30.

More specifically, when the circuit is normal, the circuit where the indicator lamp is located is powered on, the indicator lamp can emit light to indicate that the overcurrent protection circuit 20 where the indicator lamp is located is normal, when the circuit is short-circuited, the circuit where the indicator lamp is located is broken, and the indicator lamp is extinguished to indicate that the overcurrent protection circuit 20 where the indicator lamp is located is abnormal.

In one embodiment of the present utility model, as shown in fig. 2, the indicator light is a light emitting diode, the anode of the light emitting diode is used as the first end of the indicator light, and the cathode of the light emitting diode is used as the second end of the indicator light.

Specifically, the indicator light may be a light emitting diode, the light emitting diode has unidirectional conductivity, the anode of the light emitting diode is connected between the self-recovery fuse and the anode of the corresponding dc power output interface 30, the cathode of the light emitting diode is connected between the cathode of the dc power input interface 10 and the cathode of the corresponding dc power output interface 30, when the self-recovery fuse is normal, the anode voltage of the light emitting diode is higher than the cathode voltage of the light emitting diode, the light emitting diode is turned on and emits light, when the self-recovery fuse is in a fused section, the circuit of the light emitting diode is broken, the anode of the light emitting diode has no voltage, the light emitting diode is turned off, and after the overcurrent protection, the self-recovery fuse is in a recovery state, and the light emitting diode is turned on and emits light again. The LED is used for indicating whether the overcurrent protection circuit is abnormal or not so as to remind an operator to stop supplying power to corresponding electric equipment, and the electric equipment is protected.

In one embodiment of the present utility model, as shown in fig. 4, the dc shunt 100 further includes a circuit board 1, and the dc power input interface 10, the N overcurrent protection circuits 20, and the N dc power output interfaces 30 are all disposed on the circuit board 1.

Specifically, in the example of fig. 4, the circuit board 1 has one DC power input interface (DC input), and three DC power output interfaces (DC output1, DC output2, and DC output 3). Each direct current power output interface is correspondingly connected with a direct current power input interface respectively, as shown in the LED lamp 4 in fig. 4, and each direct current power output interface corresponds to one LED lamp 4. The positive electrode of each direct current power supply output interface is connected with a self-recovery fuse, the direct current power supply output interface DC output1 corresponds to the self-recovery fuse 5, the direct current power supply output interface DC output2 corresponds to the self-recovery fuse 7, and the direct current power supply output interface DC output3 corresponds to the self-recovery fuse 6.

Further specifically, the DC power input interface DC input, the three self-restoring fuses (5, 6, 7), the three LED lamps 4 and the three DC power output interfaces DC output1, DC output2, DC output3 are integrated on one circuit board 1, and the DC power input interface, the DC power output interface components, the self-restoring fuses and the light emitting diodes can be welded on the circuit board by means of welding.

In one embodiment of the present utility model, as shown in fig. 4, the dc power input interface 10 employs a two-core in-line cage spring terminal.

In particular, the crocodile pliers for wiring of the traditional direct-current power supply are exposed in part after long-term use, and the outer insulating skin is easy to damage, so that the contact short circuit of the positive electrode and the negative electrode is caused. The direct current power input interface 10 of the utility model adopts a two-core direct insertion type cage spring wiring terminal, and the wiring terminal is a structure which is convenient for inserting and pulling out cables, and the schematic diagram of the direct insertion type cage spring wiring terminal is shown in fig. 4. The in-line cage spring terminal comprises a terminal unit movable part 8 and a terminal unit fixed part 9. The two-core direct-insertion type cage spring binding post can solve the hidden trouble that the positive electrode and the negative electrode collide with each other or touch other devices under the condition that crocodile pliers are scattered freely.

In one embodiment of the present utility model, the DC power output interface 30 is a two-core in-line cage spring terminal. The direct current power output interface 30 and the direct current power input interface 10 of the utility model both adopt two-core direct insertion cage type spring wiring terminals, and the hidden trouble that the positive electrode and the negative electrode collide with each other or touch other devices under the condition of free scattering of crocodile pliers can be solved.

In one embodiment of the present utility model, the dc power input interface 10 is configured to be connected to a wire of a first predetermined caliber, where the first predetermined caliber is less than or equal to 1.5 square millimeters.

In one embodiment of the present utility model, the dc power output interface 30 is configured to be connected to a wire of a second predetermined caliber, where the second predetermined caliber is less than or equal to 0.75 square millimeters.

Specifically, the dc power input interface 10 is used for external power, and can be connected to a wire with a thickness of 1.5 square millimeters at maximum, and the dc power output interface 30 is used for connecting to electric equipment, and can be connected to a wire with a thickness of 0.75 square millimeters at maximum.

It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

It is to be understood that portions of the present utility model may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. A dc shunt, comprising:

the direct-current power supply input interface is used for externally connecting a power supply;

n overcurrent protection circuits, wherein N is a positive integer;

the direct current power supply comprises N direct current power supply output interfaces, N direct current power supply output interfaces and N overcurrent protection circuits, wherein the N direct current power supply output interfaces are in one-to-one correspondence with the N overcurrent protection circuits, each direct current power supply output interface is connected to the direct current power supply input interface through the corresponding overcurrent protection circuit, and the direct current power supply output interface is used for externally connecting electric equipment.

2. The dc shunt according to claim 1, wherein the over-current protection circuit comprises a self-healing fuse connected between the positive pole of the dc power input interface and the positive pole of the corresponding dc power output interface, wherein the negative poles of the N dc power output interfaces are each connected to the negative pole of the dc power input interface.

3. The dc shunt according to claim 2, wherein the over-current protection circuit further comprises an indicator light, a first end of the indicator light is connected to the positive electrode of the corresponding dc power output interface and to the positive electrode of the dc power input interface through the corresponding self-restoring fuse, and a second end of the indicator light is connected to the negative electrode of the dc power input interface and the negative electrode of the corresponding dc power output interface, respectively.

4. A dc shunt according to claim 3, wherein the indicator light is a light emitting diode, the anode of the light emitting diode being the first end of the indicator light and the cathode of the light emitting diode being the second end of the indicator light.

5. The dc shunt of claim 1, further comprising a circuit board, wherein said dc power input interface, N said overcurrent protection circuits, and N said dc power output interfaces are all disposed on said circuit board.

6. The direct current shunt according to claim 1, wherein said direct current power input interface is a two-core in-line cage spring terminal.

7. The direct current shunt according to claim 1, wherein said direct current power output interface is a two-core in-line cage spring terminal.

8. The dc shunt according to claim 6, wherein said dc power input interface is configured to access a first predetermined gauge wire, said first predetermined gauge being less than or equal to 1.5 square millimeters.

9. The dc shunt according to claim 7, wherein said dc power output interface is configured for accessing a second predetermined gauge wire, said second predetermined gauge being less than or equal to 0.75 square millimeters.

10. The dc shunt according to claim 1, wherein the number of the over-current protection circuits and the number of the dc power output interfaces are integers of 3 or more.