Power supply wiring terminal with indicating lamp

Abstract

The invention provides a power supply wiring terminal with an indicating lamp, and the terminal comprises a housing which is internally provided with a power supply positive electrode input end, a power supply positive electrode output end, and a power supply negative electrode input end. The protective tube assembly comprises a protective tube frame and a protective tube, the protective tube frame and the shell are rotatably installed, the protective tube is fixed to the inner side of the protective tube frame, when the protective tube frame and the shell are covered, lug plates on the two sides of the protective tube are in elastic contact with protective tube clamps, the protective tube clamps on one side are connected to the power source positive electrode input end, and the protective tube clamps on the other side are connected to the power source positive electrode output end; the protective tube is also connected in parallel with a first circuit in which an indicating lamp and a current-limiting resistor are connected in series, the input end of the first circuit is connected to a wire between the power supply anode input end and the protective tube clamp, and the output end is connected to a wire between the power supply anode output end and the protective tube clamp; a dummy load resistor is connected between the power supply anode output end and the power supply cathode input end. The method can be applied to a logic control loop of a power supply wiring terminal of a cable, and the reliability of a logic control system is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of power connection terminals, in particular to a power connection terminal with an indicator light. Background Art

[0002] The terminal block is an accessory product used to achieve electrical connection. With the development of the electronics industry, the application scope of the terminal block is increasing, and the types of terminal blocks are also diverse, such as hardware terminals, nut terminals and spring terminals. The terminal block is used to facilitate the connection of wires and has great use value.

[0003] In the prior art, in order to solve the cable grounding problem, the cable is sent to the logic control unit. The signal of the logic control loop comes from the local area, and the cable line loop to the local area must be equipped with a fuse. The best solution is to set a fuse for each line. When a fuse of a certain line is blown, it will not affect other circuits, will not expand the accident, and is easy to find and handle the fault. However, this will form a huge logic control system with many loops. However, the signal source loop of the logic control system has contacts, which may sometimes be disconnected. The load loop of the power terminal is open and cannot form a loop. Even if the fuse is blown, the indicator light will not light up. This greatly increases the difficulty of finding and handling faults.

[0004] The Chinese invention patent with the publication number of CN114421227B discloses a power terminal. The present invention relates to the field of terminal technology, specifically a power terminal, including a fixed frame, the fixed frame is designed in a concave structure, and a junction box is arranged in the middle position inside the fixed frame, rectangular grooves are provided on the left and right sides of the inner surface of the fixed frame, rotating rods are fixedly installed on the left and right outer surfaces of the junction box, and a gear is fixedly installed on one end of the rotating rod, the gear is rotatably connected inside the rectangular groove, wiring holes are provided at equal distances on the upper outer surface of the junction box, and the inside of the junction box is plugged with binding posts at equal distances, and the binding posts correspond to the wiring holes up and down. The present invention can adjust the wiring angle according to the wiring requirements, realize the quick connection between the binding posts and the wires, improve the wiring efficiency, and at the same time, reduce the complex steps of rotating the fixed joints by using tools to turn the screws, facilitate disassembly and maintenance, and simultaneously limit multiple groups of wires, reducing the damage to the wire joints. The power terminal of this technical solution has a complex structure, and there is no design of insurance, early warning prompts, etc., which cannot achieve the effect of timely discovery of problems.

[0005] In view of the above situation, the present application aims to develop a power connection terminal, which can monitor whether the fuse is intact even when the load circuit is in an open circuit state. Summary of the invention

[0006] The purpose of the present invention is to provide a power terminal block, the power terminal is provided with a fuse tube, the fuse tube contains a fuse, the fuse tube is easy to install and use, the power terminal is provided with an indicator light, and a dummy load resistor is configured to form a loop. When a fuse of a certain circuit is blown, the indicator light is on, so that the problem can be found in time.

[0007] In order to achieve the above-mentioned object, the present invention provides a power connection terminal with an indicator light, comprising: a shell, comprising a bottom terminal mounting base, a front terminal baffle and a rear mounting bottom plate; a power positive input terminal is mounted inside the upper left side of the shell, a power positive output terminal is mounted inside the upper right side, and a power negative input terminal is mounted on the lower right side; a fuse tube assembly is mounted on the top of the shell, the fuse tube assembly comprises a fuse tube rack and a fuse tube, the fuse tube rack matches the opening on the upper side of the shell and is rotatably mounted on the upper side of the shell, a fuse tube is fixed inside the fuse tube rack, and when the fuse tube rack is covered with the shell, the terminals on both sides of the fuse tube The wire pieces are all elastically contacted by the fuse clip, the lead wire of the fuse clip on one side of the fuse is connected to the positive input terminal of the power supply, and the lead wire of the fuse clip on the other side is connected to the positive output terminal of the power supply; wherein the fuse is also connected in parallel with a first circuit in which an indicator light and a current limiting resistor are connected in series, the input terminal of the first circuit is connected to the wire between the positive input terminal of the power supply and the fuse clip, and the output terminal is connected to the wire between the positive output terminal of the power supply and the fuse clip; a dummy load resistor is connected between the positive output terminal of the power supply and the negative input terminal of the power supply through a wire; the fuse clip, the indicator light, the current limiting resistor and the dummy load resistor are all fixed on the mounting base plate.

[0008] According to an embodiment of the present application, the terminal mounting base includes external card slots installed on both sides of the bottom of the shell, and the external card slots on both sides are arranged opposite to each other for clamping the guide rail, and a release button is provided on the side of the external card slot away from the guide rail.

[0009] According to an embodiment of the present application, a plurality of connection terminals are mounted on a guide rail via external card slots to form a terminal row.

[0010] According to an embodiment of the present application, the positive input terminal of the power supply, the positive output terminal of the power supply and the negative input terminal of the power supply are all connected in the shell by means of crimping screws, and the crimping screws are made of conductive metal.

[0011] According to an embodiment of the present application, the terminal baffle is connected to the mounting base plate by a snap-fit ​​connection, a plurality of protrusions are evenly distributed on the edge of the terminal baffle, and a groove matching the protrusions is provided on the mounting base plate.

[0012] According to an embodiment of the present application, the housing and the fuse frame are both made of insulating hard plastic.

[0013] According to an embodiment of the present application, an observation hole is further provided on the fuse tube rack, and a handle is provided on a side of the fuse tube rack away from the connection side.

[0014] According to an embodiment of the present application, the fuse clip, the indicator light, the current-limiting resistor and the dummy load resistor are all installed in the inner card slot on the mounting base plate.

[0015] According to an embodiment of the present application, the current limiting resistor and the false negative resistor are 7.5kΩ, 0.25W resistors, and the indicator light is an LED.

[0016] According to an embodiment of the present application, the fuse holder is hinged to the housing by a rotating shaft.

[0017] The beneficial effects of the technical solution of the present invention compared with the prior art are:

[0018] 1. When there is a contact in the input signal circuit of the cable logic control circuit, it may sometimes be in an open circuit state. This application configures a dummy load resistor, and the positive pole of the power supply returns to the negative pole of the power supply through the dummy load resistor to form a loop, so it can still monitor whether the fuse is intact. When the fuse is intact, the indicator light is off; when the fuse is blown, the indicator light is on. This application is convenient for patrol personnel to find problems in time and ensure the reliability of the logic control system.

[0019] 2. The present invention can adjust the wiring angle according to the wiring requirements through the design of the inner card slot and the shell, realize the quick connection between the pressing screw, the safety clip, the indicator light, the current limiting resistor and the dummy load resistor and the wire, and improve the wiring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the internal structure of a power connection terminal with an indicator light according to an example of the present invention;

[0021] Figure 2 The following is a circuit schematic diagram of a power connection terminal with an indicator light according to an example of the present invention.

[0022] The following are the descriptions of the reference numerals:

[0023] 10. Shell, 11. Positive input terminal of power supply, 12. Positive output terminal of power supply, 13. Negative input terminal of power supply, 14. Bottom terminal mounting base, 15. Fuse clip, 16. Indicator light, 17. Current limiting resistor, 18. Dummy load resistor, 20. Fuse assembly, 21. Fuse rack, 22. Fuse, 211. Observation hole, 212. Rotating shaft. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0025] See also Figure 1 and Figure 2As shown, a power terminal block with an indicator light in the example of the present invention includes a housing 10 and a fuse assembly 20 installed in the housing 10, a connection circuit between the power supply and the fuse 22, and an indicator light 16 circuit connected in parallel with the fuse 22, and a closed loop is provided in which the positive input terminal 11 of the power supply returns to the negative input terminal 13 of the power supply through a dummy load resistor 18. The power supply supplies power to the load through the power terminal block. Compared with the problem that the signal source loop of the logic control system of the cable in the prior art has contacts, the contacts may sometimes be disconnected, resulting in the problem that the load loop of the terminal block cannot form a loop, the present application configures a dummy load resistor 18 in the existing conventional power terminal block to form a closed loop to ensure that the fuse can be monitored at all times to see if it is intact.

[0026] In this embodiment, the housing 10 includes a bottom terminal mounting base 14 , a front terminal baffle, and a rear mounting base plate.

[0027] Specifically, the terminal mounting base includes external card slots installed on both sides of the bottom of the housing 10, and the external card slots on both sides are arranged opposite to each other for mounting the guide rail, and a release button is provided on the side of the external card slot away from the guide rail. A plurality of wiring terminals are mounted on the guide rail through the external card slots to form a terminal row. In view of the fact that the logic control system of large industrial enterprises is huge and has many circuits, and ordinary power switches are large in size and occupy a lot of space, the present application preferably uses small-sized power wiring terminals to form a small-sized power terminal row.

[0028] Specifically, the bottom terminal mounting base 14, the front terminal baffle, and the rear mounting base are preferably made of insulating hard plastic, that is, the housing 10 is preferably made of insulating hard plastic.

[0029] Specifically, the front terminal baffle and the rear mounting base plate can be connected by a snap-on connection. The edge of the terminal baffle is evenly distributed with multiple protrusions, and the mounting base plate is provided with grooves adapted to the protrusions. During installation, the protrusions of the terminal baffle are embedded in the grooves on the mounting base plate so that the two are closed to form the main body of the housing 10.

[0030] Specifically, Figure 1 As shown, a positive power input terminal 11 is installed inside the upper left side of the housing 10, a positive power output terminal 12 is installed inside the upper right side, and a negative power input terminal 13 is installed on the lower right side. These terminals are connected by crimping screws, including a crimping screw for the positive input terminal of the power supply, a crimping screw for the positive output terminal of the power supply, and a crimping screw for the negative input terminal of the power supply. These three crimping screws are staggered in spatial layout to facilitate installation and wiring.

[0031] Specifically, the wire-pressing screw is preferably made of conductive metal.

[0032] In this embodiment, the fuse assembly 20 is installed on the top of the housing 10. The fuse assembly 20 includes a fuse frame 21 and a fuse 22. The fuse frame 21 matches the opening on the upper side of the housing 10 and is rotatably installed on the upper side of the housing 10. The fuse 22 is fixed inside the fuse frame 21. When the fuse frame 21 is covered with the housing 10, the wiring pieces on both sides of the fuse 22 are elastically contacted by the fuse clips 15. The fuse clip 15 on one side of the fuse 22 leads out a wire connected to the positive input terminal 11 of the power supply, and the fuse clip 15 on the other side leads out a wire connected to the positive output terminal 12 of the power supply.

[0033] Among them, the fuse 22 is also connected in parallel with an indicator light 16 and a first circuit in which a current limiting resistor 17 is connected in series. The input end of the first circuit is connected to the wire between the positive input end 11 of the power supply and the fuse clamp 15, and the output end is connected to the wire between the positive output end 12 of the power supply and the fuse clamp 15; a dummy load resistor 18 is connected between the positive output end 12 of the power supply and the negative input end 13 of the power supply through a wire.

[0034] Specifically, the fuse clip 15, the indicator light 16, the current limiting resistor 17 and the dummy load resistor 18 are all fixed on the mounting base plate. The fuse clip 15, the indicator light 16, the current limiting resistor 17 and the dummy load resistor 18 can all be installed in the inner card slot on the mounting base plate.

[0035] Specifically, the fuse frame can be made of insulating hard plastic and used together with the housing 10. The fuse frame is rotatably connected to the housing 10 and can be hinged to the housing 10 through the rotating shaft 212. The overall shape of the fuse frame is adapted to the opening of the housing 10. When the fuse frame is rotated to cover the housing 10, it is inserted into the housing 10, so that the fuse tube 22 inside the fuse frame contacts the fuse tube clip 15 inside the housing 10. The present application does not limit the rotational connection method between the fuse frame and the housing 10, and conventional techniques in the art can be used.

[0036] Specifically, the fuse holder 21 is provided with an observation hole 211. A handle is provided on one side of the fuse holder 21 away from the connection side. The handle can be tilted upward for manual operation. Pressing or lifting the handle can cause the fuse holder 21 to rotate along the rotating shaft 212. The fuse holder 21 rotates, driving the fuse 22 to be inserted into or removed from the fuse clip 15. The fuse clip 15 has a certain elasticity to ensure that the fuse clip and both ends of the fuse 22 are in good contact. The observation hole 211 is provided on the fuse holder 21 to facilitate observation of the indicator light 16 or to facilitate the indicator light 16 to emerge from the head.

[0037] Specifically, the power terminal block with indicator light of the present application can also be connected to a PLC control system. In the PLC control logic circuit, the signal circuit generally uses a DC 24V power supply. If a DC 24V power supply is used, the current limiting resistor 17 and the false negative resistor in the figure are selected as 7.5kΩ, 0.25W resistors, and the indicator light 16 is selected as an LED, which has low power consumption. The false negative resistor has low power consumption and generates less heat, which will not affect the function of the terminal block.

[0038] In this embodiment, Figure 2 In the schematic diagram of the wiring terminal circuit shown, the indicator light 16 is connected in series with the current limiting resistor 17, and then connected in parallel with the fuse 22 to form two parallel circuits. One circuit is: the positive pole of the power supply is connected to the positive input terminal 11 of the wiring terminal housing 10 through the crimping screw, and then connected to the load through the parallel circuit and the positive output terminal 12 of the power supply connected to the crimping screw. The other circuit passes through the dummy load resistor 18 and the negative input terminal 13 of the power supply connected to the crimping screw, and returns to the negative pole of the power supply, forming a closed loop. When the fuse is intact and the load is closed, the current path is: positive pole of power supply → positive pole input terminal 11 of power supply → fuse 22 → positive pole output terminal 12 of power supply → load → negative pole of power supply, and indicator light 16 is not on; when the fuse is intact and the load is disconnected, the current path is: positive pole of power supply → positive pole input terminal 11 of power supply → fuse 22 → dummy load resistor 18 → negative pole input terminal 13 of power supply → negative pole of power supply, and indicator light 16 is not on; when the fuse is blown and the load is closed, the current path is: positive pole of power supply → positive pole input terminal 11 of power supply → indicator light 16 → current limiting resistor 17 → positive pole output terminal 12 of power supply → load → negative pole of power supply, and indicator light 16 is on; when the fuse is blown and the load is disconnected, the current path is: positive pole of power supply → positive pole input terminal 11 of power supply → indicator light 16 → current limiting resistor 17 → dummy load resistor 18 → negative pole of power supply, and indicator light 16 is on.

[0039] The working principle of the power terminal block with indicator light in this example is as follows: when the fuse in the fuse tube 22 is intact, the series circuit of the indicator light 16 and the current limiting resistor 17 is short-circuited by the fuse, and the indicator light 16 will not light up; when the fuse in the fuse tube 22 is damaged and disconnected, the indicator light 16 is powered on and lights up; when there are contacts in the load circuit, the load circuit may sometimes be in a disconnected state, but because a dummy load resistor 18 is configured, the indicator light 16 can still light up; when the indicator light 16 is on, it means that the fuse is burned out and disconnected, and when the indicator light 16 is off, it means that the fuse is intact, and the indicator light 16 monitors the state of the fuse.

[0040] In summary, the technical solution of this application has the following beneficial effects:

[0041] 1. When there is a contact in the input signal circuit of the cable logic control circuit, it may sometimes be in an open circuit state. This application configures a dummy load resistor, and the positive pole of the power supply returns to the negative pole of the power supply through the dummy load resistor to form a loop, so it can still monitor whether the fuse is intact. When the fuse is intact, the indicator light is off; when the fuse is blown, the indicator light is on. This application is convenient for patrol personnel to find problems in time and ensure the reliability of the logic control system.

[0042] 2. The present invention can adjust the wiring angle according to the wiring requirements through the design of the inner card slot and the shell, realize the quick connection between the wire pressing screw, the safety clip, the indicator light, the current limiting resistor and the dummy load resistor and the wire, and improve the wiring efficiency.

[0043] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A power terminal with an indicator light, characterized in that: include: The housing comprises a bottom terminal mounting base, a front terminal baffle and a rear mounting base plate; The upper left side of the housing is internally provided with a positive power input terminal, the upper right side is internally provided with a positive power output terminal, and the lower right side is provided with a negative power input terminal; A fuse assembly is mounted on the top of the shell, the fuse assembly includes a fuse rack and a fuse, the fuse rack matches the opening on the upper side of the shell and is rotatably mounted on the upper side of the shell, the fuse is fixed inside the fuse rack, when the fuse rack is covered with the shell, the wiring pieces on both sides of the fuse are elastically contacted by fuse clips, the fuse clip on one side of the fuse leads out a wire connected to the positive input terminal of the power supply, and the fuse clip on the other side leads out a wire connected to the positive output terminal of the power supply; The fuse is also connected in parallel with a first circuit in which an indicator light and a current-limiting resistor are connected in series, the input end of the first circuit is connected to the wire between the positive input end of the power supply and the fuse clip, and the output end is connected to the wire between the positive output end of the power supply and the fuse clip; Wherein, a dummy load resistor is connected between the positive output terminal of the power supply and the negative input terminal of the power supply via a wire; Wherein, the fuse clip, indicator light, current limiting resistor and dummy load resistor are all fixed on the mounting base plate.

2. A power terminal with an indicator light according to claim 1, characterized in that: The terminal mounting base comprises external card slots installed on both sides of the bottom of the shell, the external card slots on both sides are arranged to face each other for mounting guide rails, and a release button is provided on the side of the external card slot on one side away from the guide rail.

3. A power connection terminal with an indicator light according to claim 2, characterized in that: A plurality of connection terminals are mounted on the guide rail through the external card slots to form a terminal row.

4. A power terminal with an indicator light according to claim 1, characterized in that: The positive input terminal of the power supply, the positive output terminal of the power supply and the negative input terminal of the power supply are all connected in the shell by means of crimping screws, and the crimping screws are made of conductive metal.

5. The power terminal with indicator light according to claim 1, characterized in that: The terminal baffle is connected to the mounting base plate by snap-fitting, a plurality of protrusions are evenly distributed on the edge of the terminal baffle, and grooves matching the protrusions are provided on the mounting base plate.

6. A power connection terminal with an indicator light according to claim 1, characterized in that: The shell and the safety frame are both made of insulating hard plastic.

7. A power connection terminal with an indicator light according to claim 1, characterized in that: The fuse tube rack is also provided with an observation hole, and a handle is provided on a side of the fuse tube rack away from the connection side.

8. The power terminal with indicator light according to claim 1, characterized in that: The fuse clip, indicator light, current limiting resistor and dummy load resistor are all installed in the inner card slot on the installation base plate.

9. A power connection terminal with an indicator light according to claim 1, characterized in that: The current limiting resistor and the false negative resistor are 7.5kΩ, 0.25W resistors, and the indicator light is an LED.

10. The power terminal with indicator light according to claim 1, characterized in that: The fuse holder is hinged to the housing by a rotating shaft.

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