348results about How to "Avoid safety accidents" patented technology

A mobile robot having a returning mechanism includes one or more moving members mounted on a body of the mobile robot; and a cable member connected to one side of the mobile robot so as to supply the mobile robot with electrical power. Further, the mobile robot includes a returning member having a rigidity stronger than the cable member and disposed to wrap the cable member so that the cable member is placed within the returning member; and a take-up unit configured to pull the returning member to keep it taut.

The invention discloses a stepless regulation constant tension device for a hydraulic winch, consisting of a power pump set, a reversing valve, a hydraulic motor, a winch, a one-way valve, a balance valve and a motor safety valve, wherein the power pump set is connected with an oil inlet of the reversing valve; a first oil exchange port of the reversing valve is connected with an oil return port of the balance valve; an oil inlet of the balance valve is connected with a rope folding side oil port of the hydraulic motor; a rope release side oil port of the hydraulic motor is connected with a second oil reversing port of the reversing valve; an oil outlet of the reversing valve is connected with an oil tank; a control port of the balance valve is connected with an oil path between the rope release side oil port of the hydraulic motor and the reversing valve; the one-way valve is connected between the oil inlet and the oil return port of the balance valve in parallel; the motor safety valve is connected between the rope folding side oil port and the rope release side oil port of the hydraulic motor in parallel; and the winch is connected with the hydraulic motor. The device achieves the function of keeping the tension of a steel wire rope constant when the hydraulic winch is positioned under various work conditions and can be used for carrying out remote on-line adjustment on theoutput capacity of the hydraulic winch. The stepless regulation constant tension device has the advantages of simple structure, low cost, convenience for use and high safety.

The invention discloses a method for installing an abnormal-shape curve steel box girder, belonging to the technical field of a longspan bridge. The method for installing the abnormal-shape curve steel box girder comprises the following steps of: 1. manufacturing each section of the steel box girder, pre-assembling, and detecting the lateral welding contraction amount; 2. erecting a temporary bracket, arranging a safety protection facility and a working platform on the temporary bracket, and setting a precamber of the top support of the temporary bracket; 3. measuring and positioning on a pier, hoisting the steel box girder above the working platform, controlling hoisting in position, and integrally measuring and regulating the installed steel box girder; 4. controlling the welding deformation of the steel box girder; and 5. regulating the local line of the steel box girder. The method for installing the abnormal-shape curve steel box girder, which is disclosed by the invention, is convenient to operate, is easy to implement, has the advantages of high construction efficiency, low cost and strong maneuverability, and can be suitable for installing the abnormal-shape curve steel box girder and is easy to popularize; and the installation and the line shape of the steel box girder can be better controlled, and the construction quality is guaranteed.

The invention provides an order receiving driver identification passenger method based on image identification and an apparatus thereof. The method comprises the following steps that a terminal receives order information sent by a server, wherein the order information includes a departure place address, a destination address and passenger image information of a user which user equipment UE belongs to, and the passenger image information at least includes a user face image characteristic; and when an order receiving vehicle which the terminal belongs to arrives at a destination area, the terminal acquires a positioning coordinate of the user equipment UE, acquires road image information in a preset area range and matches with the passenger image information, and if matching is successful, the terminal notifies an order receiving vehicle driver of position information of a passenger, wherein the positioning coordinate of the user equipment UE is taken as a center. By using the order receiving driver identification passenger method based on face identification and the apparatus thereof, through matching the acquired passenger image information with the road image information, the position information of the passenger is acquired so that a condition that an order receiving driver diverts attention from driving during a passenger search process so that a safety accident is generated is avoided.

The invention provides an automatic protection system for vehicle anticollision. The system can carry out prewarning promotion when a vehicle is in a dangerous condition and can adopt emergent protection measures to effectively reduce the probability of occurrence of traffic accidents and ensure the safety of the vehicle and people in the vehicle. The system comprises a laser rangefinder, a high-speed A/D converter, a DSP control singlechip, a sunplus singlechip, a sound and light warning unit, an LED display module and a brake control unit; information of distance between a front vehicle and the own vehicle is measured by the laser rangefinder and sent to the DSP control singlechip by the high-speed A/D converter; the DSP control singlechip compares measured data and prestored safety distance; if the measured data exceeds the safety distance, the DSP control singlechip outputs a signal to the sunplus singlechip; the sunplus singlechip controls the sound and light warning unit to send a warning signal; when the DSP control singlechip monitors that the distance between two vehicles is close to a collision critical value, a command is sent to start the brake control unit for braking; and the LED display module displays relevant data.

The invention discloses a benchmark integration processing method applied to a large numerical control planomilling machine and a multi-directional locating block thereof. In the invention, the multi-directional locating block provided with a plurality of locating elements, which is fixed on the large numerical control planomilling machine serves as a uniform benchmark of cutter calibration dead-center position in each processing step and the central points of the locating elements on the multi-directional locating block serve as the initial pint and the end point of the numerical control subprogram for controlling each processing step, the multi-directional locating block is composed of a datum body and a foundation, wherein the datum body is provided with a plurality of locating elements which comprise at least one locating plane and at least one locating circular orifice. In the invention, as the uniform benchmark is set, program control in the whole processing course is realized, manual operation is avoided, production efficiency and safety are enhanced, labor intensity and economic costs are lowered, safety and quality incidents are avoided, therefore the invention is especially suitable for processing large workpieces by the numerical control planomilling machine.

The invention discloses a control method of frequency limiting and reducing of a compressor and an air conditioner using the method. The control method of frequency limiting and reducing comprises thesteps of detecting running parameters of the compressor, judging the interval range of the running parameters, and according to the judgment result, carrying out frequency limiting and reducing control over the compressor. Through monitoring of the current of the compressor and the temperature of a drive board, the running frequency of the compressor is controlled, elements of the compressor, thedrive board and the like can run within the normal range, happening of electric appliance safety accidents can be avoided, meanwhile, a unit can continuously run, frequent shutdown is not needed, andindoor temperature stability is ensured.

The defroster for refrigerator includes cold air path for circulating cold air inside the case, evaporator set on the cold air path to constitute freezing circulation, water storage tank over the evaporator to store normal temperature water, valve connected between the water storage tank and the evaporator to supply water to the evaporator selectively, and the water collecting tank below the evaporator to collect thawed water from the evaporator. In addition, between the water collecting tank and the water storage tank, there may be circulating pipeline with circulating pump to pump water from the water collecting tank to the water storage tank. Utilizing water in normal temperature to eliminate frost attached to the evaporator can avoid temperature rise during defrosting and raise freezing efficiency.

The invention discloses a method used for an elevator to realize self-rescue in elevator slipping. The technology scheme can be used for detecting the pulse number of an encoder and monitoring whether the elevator car has slippage when the braking force is not sufficient in the elevator system or a motor stops running. If the slippage happens, an opposite torque is executed according to the direction of the slippage to keep the elevator car near an initial place. The breakdown is indicated and the passengers are informed for leaving. The elevator car then automatically moves to the safest place for preventing safety accident from occurring; besides, the fault code generated in the technical scheme can facilitate the working of the maintenance staff.

The invention relates to a door locking switch and a clothing processing apparatus using the same. The door locking switch comprises following parts: a switch body formed with a block hole which allows a door hook of the clothing processing apparatus to insert; a slide block slidably installed on the back face of the switch body and reciprocating between a first position where the hook, which is inserted through the block hole, is allowed to disengage and a second position where the hook is stopped to disengage; and a fixing device for selectively fixing the slide block on the first position or the second position.

The invention discloses an intelligent door control method and device for a locomotive. An integrated electric control lock is arranged on each door of the locomotive. A master control box is installed in a cab. The master control box controls the integrated electric control locks of the doors to be opened or closed; and after acquiring a locomotive speed signal and performing operation processing, the maser control box performs locking or unlocking control over all the integrated electric control locks of the whole locomotive according to the predetermined relation between the locomotive doors and locomotive speed, the locomotive speed and the locomotive door state. According to the intelligent door control device for the locomotive, the driving speed of the locomotive is acquired in real time, and when the locomotive reaches the set locomotive door locking speed, the locomotive doors are automatically locked according to the locomotive door state and prevented from being manually opened. If the integrated electric control locks cannot be locked because the locomotive doors are not closed, the device will give a sound and light warning prompt till all the locomotive doors are closed.

The invention discloses a remote control system for temporary ground wires, comprising a management server, a detection locking mechanism, a communication server and a ground wire. The management server and a five-prevention management host are connected by a ground wire identification code and locking attachments on the ground wire. The remote control system has the following beneficial effects: a non-contact online detection state is adopted, contact and wear are avoided, the service life is long, and unlocking operation is verified in multiple ways to prevent safety accidents caused by personal failure of staff. Moreover, storage, unlocking and positions of ground wires of a plurality of substations can be monitored and managed in real time.

The invention relates to the technical field of safety of lithium-ion batteries, and discloses a lithium-ion battery with a pneumatic anti-gas-expansion automatic liquid replenishing device. The lithium-ion battery comprises a battery shell, a battery top cover board, a positive pole, a negative pole and a battery core, wherein the battery core is arranged in the battery shell; the inside of the battery shell is divided into a battery core cavity, a backup electrolyte cavity and a gas buffer cavity; the backup electrolyte cavity is filled with a backup electrolyte; a fixed partition plate is used for partitioning the battery core cavity and the backup electrolyte cavity; a pneumatic elastic film is used for partitioning the backup electrolyte cavity and the gas buffer cavity; a one-way valve A is arranged on the fixed partition plate; one-way valves B are arranged on the fixed partition plate and the pneumatic elastic film; a one-way exhaust valve is arranged on the battery top cover board; and breathable moisture absorption layers are arranged at air inlets of the one-way valve A located at the bottom of the fixed partition plate and the one-way exhaust valve. According to the lithium-ion battery with the pneumatic anti-gas-expansion automatic liquid replenishing device, the potential safety hazard caused by battery gas expansion can be effectively solved; and the electrolyte can be automatically replenished timely.

The invention discloses a material lifting device for construction projects in the technical field of the construction projects. The material lifting device comprises a bottom plate, wherein the top of the bottom plate is symmetrically fixed with two sets of mounting side walls, a rotary shaft is arranged between two sets of the mounting side walls in a penetrated mode, the rotary shaft and each set of the mounting side walls are movably connected by a bearing, the right side of the mounting side wall at the right is fixedly connected with a motor mounting table, and the top of the motor mounting table is provided with a first rotating motor. The invention has strong safety in that on one hand, a lifting plate is driven to move up and down to realize the purpose of lifting by the cooperation between screw rods and inner threaded sliding blocks; on the other hand, the lifting plate is pulled by a taken-pulling wire which is driven by a taken-up wire wheel for insurance operation. When the taken-pulling wire is fractured or screw rods and inner threaded sliding blocks are broken, safe incidents can not happen due to the direct falling of the lifting plate. By means of clamping and fixing devices, materials can be clamped and fixed by the device, so that the safe incidents can be avoided due to the slide falling of materials.

The invention relates to slicing equipment, in particular to an automatic ham sausage slicing machine for catering. Therefore, the technical problem of the invention is to provide an automatic ham sausage slicing for catering, which is high in slicing efficiency, does not easily damage ham sausages and is safe. The automatic ham sausage slicing for catering comprises a bracket, supporting legs, arotating shaft, a disc-shaped shell body, a rotating disc, a funnel, a first supporting column and the like, wherein the supporting legs are arranged on the left side and the right side of the bottomof the bracket, the disc-shaped shell body is arranged on the left side of the top of the bracket, the rotating shaft is arranged at the circle center position of the disc-shaped shell body in a rotary manner, the rotating shaft is provided with the rotating disc, and the rotating disc is located in the disc-shaped shell body. The ham sausages are sliced by a slicing mechanism, an air cylinder pushes multiple slicing cutters to move right to cut off the ham sausages, thus there is no need to cut off the ham sausages manually, security accidents caused by manual operation in the slicing processare avoided, a motor rotates to drive the rotating disc to rotate, therefore there is no need to rotate the rotating disc manually, and the slicing speed is high.

The invention provides a track traffic construction personnel safety early warning system and method. The system comprises a ranging module, an information processing module, an early warning module and a construction point safety boundary limiting module. The ranging module is used for detecting the distance between the construction point safety construction range boundary and a running train in real time; the information processing module is used for sending an alarming evacuating command to the early warning module and sending a personnel voidance check command to the construction point safety boundary limiting module when the distance between the safety construction range boundary and the running track reaches the safety distance threshold value; the early warning module sends out an alarming prompt according to the received alarming evacuating command; the construction point safety boundary limiting module is used for detecting the personnel evacuating condition within the safety construction range. According to the method, ranging and early warning equipment is mounted on vehicles and construction points, and when the vehicles are close, personnel are reminded of the distance between the personnel and the vehicles in real time. According to the system and method, the complete and automatic construction personnel early warning system is used for replacing an original manual alarming mode, the early warning process is accurate, timely and reliable, and safety accidents caused by personnel negligence are avoided effectively.

The invention discloses a self-locking structure for elevator stall used in the field of building automation engineering and relates to the technical field of building automation engineering. The self-locking structure comprises a mounting seat, wherein the front of the mounting seat is fixedly connected with a positioning seat; positioning cavities are formed in the positioning seat; the interiors of the positioning cavities are movably connected with self-locking blocks; self-locking mechanisms are arranged in the positioning cavities; the interior of the positioning seat is movably connected with a main winch; the front of the main winch is fixedly connected with an auxiliary winch; the outside of the auxiliary winch is fixedly connected with stopping blocks; and the back of the positioning seat is fixedly connected with a locating ring I. The self-locking structure for elevator stall used in the field of building automation engineering adopts the design of self-locking for stall, so that when an elevator breaks down to fall in a stalled manner, self-locking can be achieved timely through the structural characteristics of the self-locking structure to prevent an elevator car from falling rapidly, thus avoiding safety accidents caused by the stall of the elevator and effectively improving the safety of passengers in the elevator; and therefore, the self-locking structure is more in line with the requirements of building automation.

The invention relates to an electronic bicycle locking method and a locking system. The locking method comprises the following steps: according to a signal from a radio frequency induction device, a signal of a locking device and a communication connection signal of a charge socket, transmitting an on/off signal to an on/off circuit of the locking device by a charge pile main machine, and powering on an electromagnetic locking part, thereby locking a foldable electronic bicycle on a charge pile. By adopting the locking method, a mode for detecting whether the foldable electronic bicycle is locked in a correct position or not can be provided, and security accidents caused by poor contact of a charge plug and a charge socket can be avoided. By adopting the locking system, on the basis that after the signal from the radio frequency induction device, the signal of the locking device and the communication connection signal of the charge socket are transmitted to the charge pile main machine of the electronic bicycle, the on/off signal is transmitted to the on/off circuit of the locking device, and then the electromagnetic locking part is powered on to lock the foldable electronic bicycle on the charge pile.

The invention discloses a working platform load monitoring system, which is used for high-altitude operation engineering machinery, and comprises a weighing sensor, a controller and an overload limiting device, wherein the weighing sensor collects load signals in real time and sends the load signals to the controller. When the load of a working platform is more than the scheduled load, the controller sends an instruction to the overload limiting device, and the overload limiting device stops the motion of the working platform according to the instruction. The invention also discloses high-altitude operation engineering machinery comprising the working platform load monitoring system. The working platform load monitoring system can automatically complete the monitoring of the working platform load, not only can obtain accurate detection results to avoid the waste of loading energy, but also can stop the motion of the working platform when the actual load is close to a scheduled value toprevent safety accidents.

The invention relates to the technical field of engineering machinery and discloses a winch hydraulic control system and engineering machinery. The winch hydraulic control system for increasing action safety of a winch mechanism of the engineering machinery and effectively preventing safety accidents caused by weight or ladder assembly sliding down during wind brake comprises a winch motor, a motor reversing valve, a winch brake, a hydraulic control reversing valve and a switch control valve. The working oil port of the winch brake is communicated with the working oil port of the hydraulic control reversing valve. The first oil inlet, the second oil inlet and the oil outlet of the switch control valve are respectively the lifting high-pressure oil port and the descending high-pressure oil port of the winch motor and the control oil port of the hydraulic control reversing valve. When the oil pressure at the control oil port is larger than the set working pressure of the hydraulic control reversing valve, the hydraulic control reversing switches from the first working position to the second working position, wherein when the hydraulic control reversing valve is at the first working position, the working oil port of the hydraulic control reversing valve is communicated with the oil outlet, and when the hydraulic control reversing valve is at the second working position, the working oil port of the hydraulic control reversing valve are communicated with the oil inlets.

The invention relates to a child safety door fence which comprises a door fence frame and a door fence leaf. The upper end of one side of the door fence leaf is connected with the door fence frame through a springback device. The springback device comprises a leaf corner block and a frame corner block. The leaf corner block and the frame corner block are in mutually-rotating connection. A spring which provides downward tensile force for the leaf corner block is arranged at the position of a rotating shaft. A first step surface on the leaf corner block abuts against a ring of flange on the frame corner block. The height of the flange is smoothly decreased progressively from the wall direction to the door fence leaf direction. A locking device is arranged at the upper end of the other side of the door fence leaf. According to the child safety door fence, automatic closing of the small-angle door fence is achieved, the safety performance of the door fence is greatly improved, and due to the fact that elastic potential energy of the spring is not completely depended, the service life of the door fence is also greatly prolonged.

The invention relates to a light-small type hand hoisting traction machine, and the body of the machine comprises an external wall panel, a frame, a ratchet casing and a leading chain block, wherein the external wall panel and the ratchet casing are arranged on two sides of the frame separately, the leading chain block is arranged at the bottom of the frame, a driving mechanism is a double-geared driving mechanism, wherein a spline gear is arranged on the right side of a hoisting chain wheel, a major axis gear passes a center hole of the hoisting chain wheel and gear side of the major axis gear is rightward, a middle gear is arranged in a hole on the right side of the frame and engaged with the major axis gear and the spline gear, a brake of a dragging chain is arranged on the left side of the major axis gear via a spline, wherein friction disks and a ratchet are sleeved on the brake seat, two friction disks are arranged on two sides of the ratchet, a clutch spring is arranged between the brake seat and arresting nut, the ratchet is engaged with a pawl which is fixed on the frame via a pawl pin, in a operating mechanism, a handle and a wrench are in split clamping structure, in a tail ring limiting device, a chain through hole is arranged in the center of a positioning block, wherein a top lock is arranged at the end portion of one side of the block body, the top lock can be crewed into or crewed out from the chain through hole, and a latch groove of a collar bolt at the end of the chain is arranged at the lower end of the end portion of one side of the block body.

The invention discloses a hinge device used for a pickle refrigerator, belonging to the general structure characteristics of a refrigerator door. The invention comprises a cover forming the appearance, a compression spring which is positioned at the inner side of the cover and is used for supplying elastic force for the door damping in a certain zone, a rotation axis which is positioned at the inner side of the cover and combined with one side of the door and moves along with the rotation of the door, a slide component which is positioned at the inner side of the cover and moves forward and backward by means of the contact of the rotation axis and the compression spring, a cover cap which is positioned at the lateral side of the cover and is used for sealing the open lateral side of the cover, a clutch bulge which projects from one side to the outer flank of the rotation axis according to a certain curvature, and a clutch ring made of elastic material which is arranged at the inner periphery face of the cover cap and is selectively contacted with the clutch bulge when the rotation axis is rotated. The invention with the structure can supply convenience and safety in use, reduce production cost, improve operation efficiency and reduce noise.

The invention discloses a guiding lighting system. The guiding lighting system comprises 1 to N lighting devices, wherein each lighting device comprises a motion sensor, a lamp unit, a communication unit and a controller; the motion sensor detects the motion of an object; the lamp unit is controlled to have a preset minimum brightness level, a preset maximum brightness level, and at least one brightness level between the maximum brightness level and the minimum brightness level; and the communication unit transmits a brightness control signal of the lamp unit to the communication unit of an adjacent lighting device in a wired or wireless way and receives the brightness control signal of the lamp unit from the communication unit of the adjacent lighting device.

The present invention provides a natural gas leakage warning system and method applied to a city. The characteristics of the system comprises: when the natural gas leakage of a natural gas leakage warning platform happens in some one residential building, the position information of the residential building where the natural gas leakage happens, the building name and the street name around the residential building where the natural gas leakage happens is sent to a vehicle monitoring platform through the internet of things, and the vehicle monitoring platform is configured to determine that the natural gas leakage warning information including the position information and the building name of the residential building where the natural gas leakage happens are sent to the target vehicle through the internet of things when the street where the street name belongs to has a target vehicle. According to the embodiment of the invention, the natural gas leakage warning system and method applied to the city can timely know which one residential building generates natural gas leakage so as to avoid causing the severe accidents.

The invention discloses an environmental security management method based on a mobile internet and an interactive system thereof. The environmental security management method is characterized by comprising a monitor, a micro-processor, a base station, a cloud server and a plurality of mobile hand-held equipment; the monitor comprises at least one sensor and a network module, wherein the sensor is installed at a position to be monitored; the micro-processor comprises an analysis module, a storage module, a control module and a network module; the micro-processor receives a data signal sent by the sensor through the network module and sends the data to the base station through the network module; the base station comprises a wireless transceiving device and a controller; the base station sends the digital signal to the cloud server through a wireless network via the wireless transceiving device; and the mobile hand-held equipment is connected with the cloud server through the wireless network. According to the invention, enterprise environments and security information can be known in real time; unified management is realized; the supervision flow is simplified; the workload of inspectors is lightened; and the management cost is reduced.

The invention relates to a transportation device, in particular to a high-reliability electric instrument transportation device for electric power. The high-reliability electric instrument transportation device for electric power aims at achieving the technical effect of being high in safety. In order to achieve the technical effect, the high-reliability electric instrument transportation device for electric power comprises a baffle, a first elastic part, a transportation box, an anti-shock box, a placing frame and the like. The first elastic part is connected between the bottom of the baffle and the inner wall of the transportation box. A buffer device is arranged at the bottom inside the transportation box. The anti-shock box is placed on the buffer device. An anti-shock device is arranged in the anti-shock box. The placing frame is placed on the anti-shock device. By combining the buffer effect of the buffer device with the anti-shock effect of the anti-shock device, the transportation safety coefficient of a distribution box is greatly improved, and electric instrument transportation is higher in reliability.

The invention discloses a vehicle braking fault diagnosis device which is used for diagnosing types of vehicle braking faults. The braking fault diagnosis device is characterized by comprising a braking detection unit which is used for detecting the stroke of a brake pedal of a vehicle, a potential detection unit which is used for detecting the potential of a braking switch main circuit and the potential of a brake switch auxiliary circuit of the vehicle, and a control unit which is connected with the braking detection unit and the potential detection unit and is used for determining the typesof the vehicle braking faults according to the stroke of the brake pedal detected by the braking detection unit and the potential of the braking switch main circuit and the potential of the braking switch auxiliary circuit detected by the potential detection unit when it is determined that the vehicle braking faults occur. The invention further discloses a vehicle braking fault diagnosis method.According to the stroke of the brake pedal of the vehicle, the potential of the braking switch main circuit and the potential of the braking switch auxiliary circuit, whether the braking switch faultsare braking switch sticking or braking circuit faults is determined, and a prompt is issued in time.

The invention relates to the field of traffic information equipment and in particular relates to a subway traffic guide type LCD (Liquid Crystal Display) display interactive system. The subway traffic guide type LCD display interactive system is composed of terminal service equipment distributed in each region and one set of center control equipment, wherein each set of terminal service equipment is composed of a display system and a No.1 wireless communication device; the display system is electrically connected with the No.1 wireless communication device; the center control equipment is composed of a background service computer and a No.2 wireless communication device; and the background service computer is electrically connected with the No.2 wireless communication device; and each display system is communicated with the background service computer through the No.1 wireless communication device and the No.2 wireless communication device. With the adoption of the subway traffic guide type LCD display interactive system, passengers can rapidly obtain needed information, and the passengers are effectively and safely guided through stereoscopic guide information, so that a phenomenon that the passengers stay in subway stations because the passengers do not know the directions is avoided, and safety accidents caused by the fact that many people make the stations congested are effectively avoided.

The invention discloses an intelligent earth wire for connecting an automobile emergency startup power supply with an automobile storage battery. According to the invention, an MCU is adopted as a control chip and combined with a power supply circuit, a temperature detection circuit, a voltage detection circuit, a working state prompting circuit, a load access detection circuit, a load connectionstate identification circuit, a connection control circuit and other peripheral circuits. In this way, an automobile storage battery externally connected with the earth wire can be detected. By meansof the MCU, the connection state of the automobile storage battery can be judged. Meanwhile, when the automobile storage battery is in a positive connection state, the electric connection between a first negative electrode connecting end and a second negative electrode connecting end is connected through a connection control circuit control switch. The automobile emergency startup power supply andthe automobile storage battery are connected in parallel. In this way, the formation of a short circuit at the two ends of the earth wire is avoided. Meanwhile, the occurrence of a safety accident caused by the reverse connection of the automobile storage battery is avoided, so that the product is safer and more reliable.