JP3086379U - DC power supply connection line with polarity protection function - Google Patents

Abstract

(57) [Summary] (Modified) [PROBLEMS] To provide a DC power supply connection line having a polarity protection function which is easy to operate, whose polarity is protected, and which is safe for use. A first clip (positive pole) 4 of the positive and negative conductive wires 4, 5 mainly comprising a polarity protection device 3, a positive conductive wire 4, and a negative conductive wire 5.
1, 51 and the other second clip (minus pole) 4
2 and 52 are sandwiched between the normal end and the failed end, respectively, and whether the polarity sandwiched between the plus voltage measurement unit 35 and the minus voltage measurement unit 36 is correct is measured, and one end is incorrectly connected and When the voltage is measured, the current flows toward the minus voltage measuring unit 36, and the low power relay control unit 32 is in a state where the circuit is disconnected,
At the same time, the warning unit 37 is activated.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a DC power supply connection line having a polarity protection function, and in particular, comprises a polarity protection device, a positive electrode conductive line, a negative electrode conductive line, and the like. (Positive pole) and the other second clip (minus pole) are sandwiched between the normal end and the battery of the car on the faulty side, respectively, for easy operation and protected polarity. Be involved in things that are safe.

[0002]

[Prior art]

 As shown in FIG. 1, in the power supply connection line of the most basic known structure, clips 11, 12, 13, and 14 are provided at the extreme ends of two conductors, and the same side is a pair. The purpose is to connect the clips 11 and 12 and the other set of clips 13 and 14 to a correctly failed portion to connect them to a power supply. Among the known structures, the improved one has a light emitting diode 15 connected between the positive and negative power supply connection lines of the known structure in the positive direction, and the clip at the normal end sandwiches the positive and negative poles of the normal power supply. When installed, the light emitting diode 15 emits light by a positive bias voltage to indicate that the light emitting diode 15 is correctly connected, and a test conductive piece 17 is drilled with another light emitting diode 16. In some cases, the light emitting diode 16 emits light to detect the negative pole at the faulty end.

[0003]

[Problems to be solved by the invention]

 First, in the case of the most basic known structure as described above, the clip must always be inserted in the correct place, and if the polarity is incorrectly connected due to lack of knowledge or carelessness, etc. In such a case, the circuit system itself may be broken. However, even with the improved one, the operation is onerous, and if the user mistakenly uses the device without connecting to it, there is a risk that the device may break down. In addition, since all power supply connection lines with known structures are normally closed current circuits, their polarity is not protected if they are forcibly connected incorrectly, and the breaker will cut the line appropriately in the event of a short circuit. Although it protects the railway line, it only minimizes destruction, and instantaneous receiving of short-circuit current sparks and surprises the surrounding people, eventually overloading. Only the purpose of short-circuit protection has been achieved, but no effect of polarity protection has been provided. Moreover, in a situation where the voltage is completely low or too low to be sensed, the polarity cannot be determined with a power supply connection line having a known structure. Therefore, the present invention provides a DC power supply connection line having the polarity protection function of the present invention, which is easy to operate, whose polarity is protected, and which is safe for use.

[0004]

[Means for Solving the Problems]

 It consists mainly of a polarity protection device, plus and minus conductors, the first clip (plus pole) of both plus and minus conductors, and the other second clip (minus pole). Between the normal end and the battery of the car on the faulty side, and measure whether the polarity between the positive voltage measurement circuit and the negative voltage measurement circuit unit is correct, and measure the positive voltage. When the circuit has a first clip (positive pole) and a second clip (positive pole) of the positive conductive wire having a positive voltage, the positive voltage measuring circuit transmits a conduction signal to a low power relay control unit; The low-power relay control unit is turned on, and the high-power relay control unit is turned on at the same time to form a circuit that has been energized. If the voltage is measured as a negative voltage, the current flows toward the negative voltage measurement unit, and the low power relay control unit is not energized, so that the circuit is cut off and the signal is driven at the same time. To activate the warning unit to indicate that it is connected incorrectly.

[0005]

[Embodiment]

 As shown in FIG. 4, the present invention mainly comprises a positive conductive wire 4 and a negative conductive wire 5, and the first clip (positive pole) 41 of the positive conductive wire 4 and the negative conductive wire 4. The first clip (minus pole) 51 of the wire 5, the first clip (minus pole) 42 of the plus conductive wire 4, and the first clip (minus pole) 52 of the minus conductive wire 5 are 2 Is assumed to be sandwiched between the normal end and the defective end. The polarity protection device 3 (see FIG. 2) mainly includes a power supply unit 31, a low-power relay control unit, a high-power relay control unit 33, a conduction monitor unit 34, a positive voltage measurement unit 35, a negative voltage measurement unit 36, It comprises a warning unit 37, a manual switch 38, and an overvoltage automatic disconnection protection unit 39, and mainly determines whether the polarity connected by the positive voltage measuring unit 35 and the negative voltage measuring unit 36 is correct or not. When the positive voltage is applied between the first clip (positive pole) 41 or the first clip (negative pole) 42 of the positive electrode conductive wire 4, the positive voltage is measured. A conduction signal is transmitted by the measured circuit to conduct to the low-power relay control unit, and the low-power relay control unit is rendered conductive. To conduct the conduction of the power Tsugiden control unit 33, it becomes conducting circuit between the child doing, as well as already revealed that you have energized by vent collector monitor unit 34. Conversely, if one end is mistakenly pinched or the voltage is measured as a negative voltage, the negative voltage measuring unit 36 is closed so that the low power relay control unit is excited and cannot conduct. In this state, the warning unit 37 is activated by transmitting a drive signal to indicate that the state is incorrect, thereby preventing the device from being damaged due to incorrect connection and ensuring safety. Secure.

As shown in FIG. 3, in the detailed circuit embodiment of the present invention, the first clip (positive pole) 41 of the positive pole conductive wire 4 and the input of the first clip (minus pole) 42 are provided. The terminals P1 and P2 are respectively connected to both ends of the normally open contact of the high power relay control unit 33, and the positive voltage measuring unit 35 and the negative voltage measuring unit 36 are used to excite the high power relay control unit 33. A coil is provided at one end of the normally open contact of the low power relay control unit, and the excitation coil of the low power relay control unit is controlled by the positive voltage measuring unit 35. The starting ends (bases of transistors and the like) of the first starting unit 351 and the second starting unit 352 of the positive voltage measuring unit 35 are input to the first clip (positive pole) 41 and the first clip (minus pole) 42, respectively. One end (the output electrode of the transistor) of the open circuit contact of the first starting unit 351 and the second starting unit 352 is connected to the input terminal of the 354, and the output of the 354 is controlled by the terminals P1 and P2. The end is connected to the starting end (base of the transistor) of the conduction driving unit 353, and the open circuit contact (output electrode of the transistor) of the conduction driving unit 353 is connected to the excitation coil of the low power relay control unit. Connected to determine whether to conduct the low power relay control unit.

When the positive conductive wire 4 and the negative conductive wire 5 are connected to the normal end and the faulty end, respectively, the first clip (positive pole) 41 or the first clip of the positive conductive wire 4 The input terminals P1 and P2 of the (negative pole) 42 generate an input voltage, and if the positive conductive line 4 and the negative conductive line 5 are accurately sandwiched, the input terminals P1 and P2 become positive. And the starting ends (bases of transistors, etc.) of the first starting unit 351 and the second starting unit 352 simultaneously obtain a positive starting voltage, and are in a conductive state (the voltage value is larger than 0.7 volts, NPN). That is, when the type transistor is taken as an example), that is, the normally open contacts of the first starting unit 351 and the second starting unit 352 simultaneously close the circuit and conduct (the output electrode and the emitter mutually conduct), The 354 is simultaneously connected to both input terminals. At this time, the output terminal of the 354 generates a trajectory signal, and the conduction driver 353 becomes conductive (when the voltage value is 0.7 volt or more and an NPN transistor is used as an example). The power relay control unit and the exciting coil of the high power relay control unit 33 close the normally open contact of the high power relay control unit 33, and the positive conductive wire 4 and the negative conductive wire 5 are closed. Is a conductive circuit. On the other hand, when the positive electrode conductive wire 4 and the negative electrode conductive wire 5 are connected at one end by mistake, the first starting unit 351 or the second starting unit 352 of the positive voltage measuring unit 35 is disconnected. (When the voltage is smaller than 0.7 volts and an NPN transistor is used), even if the 354 cannot output a start-up signal to make the conduction driving unit 353 conductive, at this time, 4 and the negative electrode conductive wire 5 are disconnected from each other, thereby preventing the device from being damaged due to a mistake in electrical connection and ensuring safety.

The negative voltage measuring unit 36 includes a first back amplifier 361, a second back amplifier 362, an abnormality comparator 363, and a pressurizing unit 364, and includes the positive electrode conductive wire 4 and the negative electrode conductive wire. 5 have one-way conducting portions D5 and D6 connected in opposite directions between the input terminals of the first buck amplifier 361 and the opposite directional input terminals of the second buck amplifier 362, respectively. When the connection between the conductive line 4 and the negative electrode conductive line 5 is correct, the one-way conducting portions D5 and D6 block the passage of a current signal, and the output of the first back amplifier 361 and the output of the second back amplifier 362. Even if the voltage at the terminal is close to 0 volts and is much lower than the reference potential formed by the pressurizing section 364 connected to the input terminal in the opposite direction of the abnormal comparator 363 and R14, R15, it is connected to the output terminal. The warning unit 37 (buzzer) will not work. Conversely, if one end of the polarity is reversed, a negative voltage is generated and passes through the one-way conducting portions D5 and D6, and the negative voltage is generated through the first back amplifier 361 or the second back amplifier 362. The voltage is converted to a positive voltage, transmitted to the non-opposite input terminal of the abnormal comparator 363, and becomes higher than the reference potential formed by the pressurizing section 364 and R14, R15, the warning unit 37 (buzzer) Is activated by receiving a positive voltage to warn that it is abnormal.

The input terminal of the overvoltage comparator 391 of the overvoltage automatic disconnection protection unit 39 is connected to the positive pole conductive wire 4 and the first clip (negative pole) 42. Is connected to the input terminal of the abnormal comparator 363 of the minus voltage measuring unit 36, and when the voltage exceeds a set value, the abnormal comparator 363 activates the warning unit and the overvoltage The output terminal of the comparator 391 is connected to the starting terminal (such as the base of a transistor) of each of the overvoltage disconnecting portions 392 and 393, and the overvoltage disconnecting portions 392 and 393 are connected to at least one or more normally open contacts (transistors). There is an output electrode and an emitter under a normally open state, and one side of the normally open contact (such as an output electrode of a transistor) has a triggering end (g) of the first starting unit 351 or the second starting unit 352. When one of the overvoltage comparator 391 and the overvoltage disconnecting unit 392 is activated and becomes conductive, the normally open contact is closed (the output electrode and the emitter are electrically connected to each other). ), And the current is caused to flow directly to ground through the closing contact formed by the overvoltage comparator 391 and the overvoltage disconnecting section 392. At this time, the first starting section 351 or the second starting section 352 does not flow because the current does not flow. Since a positive voltage is not obtained, the input terminal P1 and the input terminal P2 of the positive electrode conductive wire 4 are disconnected from each other, and the purpose of cutting off the conduction is achieved. The power supply unit 31 has one-way conducting parts D2 and D4 connected in opposite directions at the input terminals P1 and P2, respectively, and one-way conducting parts D2 and D4 connected in the forward direction. Appropriate control voltages are provided to the positive voltage measuring unit 35 and the negative voltage measuring unit 36, and if the first clip (plus pole) 41 and the first clip (minus pole) 42 of the positive electrode conductive wire 4 are connected to each other. If they are connected in reverse, the voltage is sent to the negative pole input terminal of the warning unit 37 connected to the normally closed contact of the relay RELAY2 via the one-way conducting parts D1 and D3 in the opposite direction, and the warning unit 37 (buzzer) ) Is activated, and the positive voltage measuring unit 35 and the negative voltage measuring unit 36 cannot obtain the power supply Vcc, and lose the warning function.

As shown in FIG. 3, the energization monitor unit 34 has one end of the input of the 341 and the end of the input of the 342, respectively, the first starting unit 351 of the positive voltage measuring unit 35 and the starting end of the second starting unit 352. And a conduction reference potential (ground, etc.). The output terminals are connected to a first current monitor 343 and a second current monitor 344, respectively. When one of the positive voltage measuring unit 35 and the second starting unit 352 becomes conductive, the output 341 is connected. Alternatively, 342 outputs a conduction signal, indicating that the first conduction monitoring unit 343 or the second conduction monitoring unit 344 is conducting. As shown in FIGS. 2 and 3, a manual switch 38 is arranged in parallel between the conduction driving units 353 of the positive voltage measuring unit 35, and the voltage is measured when the voltage is completely lost or when the voltage is low. This prevents an impossible situation, that is, even if the positive voltage measuring unit 35 and the negative voltage measuring unit 36 cannot measure the polarity of the voltage, the starting operation can be forcibly completed. Further, as shown in FIG. 5, the polarity protection device 3 is installed in a closed space, and the conduction monitor unit 34 and the manual switch 38 only need to be installed above, so that the waterproof effect is also obtained. provide.

[0011]

[Effect of the invention]

 According to the present invention, the danger due to a short circuit is prevented, the device is prevented from being damaged by judging whether or not the polarity connection is correct, and the high-power relay control unit is controlled by a low-power relay control unit. By providing the unit drive signal, sparks are prevented from scattering, no matter how you operate it, it will not break down, and it can respond to very small voltages (1 volt, etc.), and it is easy to operate The goal of being convenient and safe to use has been achieved.

[Brief description of the drawings]

FIG. 1 is a three-dimensional view of a known structure.

FIG. 2 is a block diagram of the structure of the present invention.

FIG. 3 is a structural explanatory view of the circuit of the present invention.

FIG. 4 is an explanatory view of the arrangement in the present invention.

FIG. 5 is another embodiment of the present invention.

[Explanation of symbols]

 11, 12, 13, 14 Clip 15, 16 Light emitting diode 17 Test conducting piece 2 Car battery 3 Polarity protection device 31 Power supply unit 32 Low power relay control unit 33 High power relay control unit 34 Energization monitor unit 341 Second comparison logic Gate 342 Third comparison logic gate 343 First conduction monitoring unit 344 Second conduction monitoring unit 35 Positive voltage measurement unit 351 First activation unit 352 Second activation unit 353 Conduction driving unit 354 First comparison logic gate 36 Negative voltage measurement unit 361 First back amplifier 362 Second back amplifier 363 Abnormality comparator 364 Pressurizing unit 37 Warning unit 38 Manual switch 39 Overvoltage automatic disconnection protection unit 391 Overvoltage comparator 392,393 Overvoltage disconnection unit 4 Positive electrode conductive wire 41 -Up (positive electrode) 42 second clip (positive electrode) 5 minus Gokushirube wire 51 first clip (negative electrode) 52 second clip (negative pole) REKAY2 relay D1~D6 one-way conductive portion P1, P2 input

Claims (5)

[Utility model registration claims] 1. A power supply unit, a low power relay control unit, a high power relay control unit, a conduction monitor unit, a positive voltage measuring unit, a negative voltage measuring unit, a warning unit, a manual switch, and an overvoltage automatic disconnection protection unit. A polarity protection device, a DC power supply connection line having a polarity protection function comprising a positive polarity conductive wire and a negative polarity conductive wire, the first clip being a positive polarity of the positive polarity conductive wire, and the negative polarity A first clip which is a negative pole of the conductive wire, a second clip which is a positive pole of the positive conductive wire, and a second clip which is a negative pole of the negative conductive wire, respectively. Between the positive voltage measurement unit and the negative voltage measurement unit, the polarity is correct. When the positive voltage circuit has a first clip that is a positive pole of the positive conductive wire and a second clip that is a positive pole has a positive voltage, the positive voltage measuring circuit outputs a conduction signal to the low power. Transmitting to the relay control unit, the low power relay control unit conducts and at the same time the high power relay control unit conducts, becomes an open circuit state, and indicates whether or not power is supplied by the power supply monitoring unit, Conversely, if a negative voltage is measured by being sandwiched by mistake, the current flows toward the negative voltage measurement unit, and the low power relay control unit is not excited, that is, the circuit is disconnected. And a direct current having a polarity protection function, which transmits a drive signal to a warning unit to indicate that the connection is incorrect. Source connection line. 2. The starting terminals of the first starting unit and the second starting unit of the positive voltage measuring unit are controlled by input terminals of a first clip which is a positive pole and a second clip which is a positive pole, respectively. The first activation section and the second activation section open circuit contact side are connected to the input terminal of the first comparison logic gate, and the activation terminal of the conduction driving section is connected to the output terminal of the first comparison logic gate. In addition, the open circuit contact of the conduction drive unit reaches the excitation coil of the low power relay control unit, and the positive conductive wire and the negative conductive wire are connected to the normal end and the fault end, respectively. That is, an input voltage is generated at the input terminal of the first clip which is the positive pole of the positive conductive wire or the second clip which is the positive pole, and the first clip which is the positive pole and the second clip which is the positive pole. Click When both poles are correctly sandwiched, the input terminal obtains a positive voltage, and the activation terminals of the first activation unit and the second activation unit acquire a positive voltage so as to activate at the same time, and become conductive. Closing the normally open contacts of the first activation unit and the second activation unit to make them conductive, so that the two input terminals of the first comparison logic gate simultaneously receive an activation signal, The output terminal generates a start signal to activate the conduction driving unit to be in a conducting state, and at the same time, the high power relay control unit is normally opened by the excitation coils of the low power relay control unit and the high power relay control unit. If the contacts are closed and the positive and negative conductive lines form a conducting circuit, conversely, if the polarity of one end of the positive and negative conductive wires is incorrect, measure the positive voltage. First activation of the unit Part or the second activation part is in a closed state, the first comparison logic gate outputs an activation signal and the activation part cannot be brought into a conductive state, and the positive electrode conductive line and the negative electrode conductive line become inactive. 2. A DC power supply connection line having a polarity protection function according to claim 1, wherein the DC power supply connection line has a disconnection state. 3. The negative voltage measuring unit comprises a first buck amplifier, a second buck amplifier, an abnormality comparator, and a pressurizing unit, and the input terminals of the positive conductive line and the negative conductive line are respectively connected to the negative and positive input terminals. When the one-way conducting portion is connected in the opposite direction between the reverse input terminals of the first buck amplifier and the second buck amplifier, and the polarity of the positive conductive wire and the negative conductive wire is accurately sandwiched. The current signal is blocked by the one-way conducting part, the output terminal voltages of the first buck amplifier and the second buck amplifier approach as much as 0 volts, and the voltage is divided between the pressurizing part connected to the abnormal comparator reverse input terminal and the voltage dividing part. If the voltage becomes much lower than the reference potential formed by the resistor, the warning unit connected to the output terminal of the abnormal comparator does not operate, and if the polarity is reversed, a negative voltage is generated. The Through the first buck amplifier or the second buck amplifier to convert the negative voltage to a positive voltage, and transmitted to the non-reverse input terminal of the abnormal comparator, where the absolute value of the negative voltage is The value is higher than a reference potential formed by the pressurizing portion and the voltage dividing resistor, and the warning unit is activated by obtaining a positive voltage to indicate an abnormality. 1
A DC power supply connection wire having the polarity protection function described in the above. 4. An input terminal of the overvoltage comparator of the overvoltage automatic disconnection protection unit is connected to a first clip and a second clip, which are positive poles of a positive conductive wire, and an abnormal output terminal of the voltage comparator. The input terminal of the comparator is connected, and when the voltage exceeds the set value, the abnormal comparator activates the warning unit, and the output terminals of the overvoltage comparator are respectively connected to the activation unit of the overvoltage disconnecting unit. The overvoltage disconnecting section has at least a normally open contact, and one side of the normally open contact is connected to the activation sections of the first activation section and the second activation section, and the overvoltage disconnection section is activated. When it is turned on, the normally-open contact closes and becomes short-circuited. At this time, the first starting unit or the second starting unit does not start a positive voltage due to no current flowing, and thus, the positive electrode conductive line Disconnection occurs between both input terminals, and conduction is interrupted. DC power supply connection line to androgynous polarity protection claim 1, wherein the object is achieved. 5. The power supply unit is connected to the input end of the one-way conductive part in the opposite direction to the one-way conductive part and in the positive direction to the one-way conductive part. When connected in the opposite direction, a normally closed contact through which the negative voltage is transmitted is connected to the negative input terminal of the warning unit via the one-way conducting portion connected in the opposite direction, and the normally closed contact is connected to the warning unit in a positive direction. By generating a voltage difference and activating the warning unit, the voltage measurement unit and the minus voltage measurement unit cannot obtain power,
2. The DC power supply connection line having a polarity protection function according to claim 1, wherein the warning function is lost.