112results about How to "Prevent accidental electric shock" patented technology

The invention discloses a smart home combined wardrobe. The smart home combined wardrobe comprises a control cabinet. Combined cabinets are evenly arranged on the two sides of the control cabinet. Auxiliary wardrobe bodies are arranged on the lateral sides of the combined cabinets at the tail ends of the two sides. The control cabinet is wirelessly connected with the Internet. A controller is arranged on the front face of the control cabinet. An exhaust fan is arranged at the upper end of the control cabinet. Net plate frames, temperature sensors and humidity sensors are arranged in the combined cabinets and the auxiliary wardrobe bodies. Ultraviolet sterilization lamps are arranged on the portions, located at the same horizontal positions of clothes hanging rods, on the inner walls of the combined cabinets and the auxiliary wardrobe bodies respectively. Miniature motors are connected to wardrobe doors of the combined cabinets and the auxiliary cabinet bodies respectively. Warm air machines are arranged at the bottoms of the auxiliary wardrobe bodies. Shutter plates are arranged at the upper ends of the warm air machines. The smart home combined wardrobe can intelligently assist users in selecting appropriative clothes, the clothes taking speed is increased for the users, stored clothes can be automatically dried and sterilized, and the size of the storage space can be regulated according to requirements of the users.

The invention relates to a three-phase four-wire plug and socket plugging assembly, which comprises a plug assembly and a socket assembly, wherein four male end binding posts are arranged on the bottom surface of a plug shell of the plug assembly; a plug body is arranged on the top surface of the plug shell; a concave annular zero line, a U-phased contact, a V-phase contact and a W-phase contact are arranged on the plug body; four male end binding posts are connected with corresponding contacts respectively; a socket core is arranged in a socket shell of the socket assembly; a center jack is arranged in the socket core; an arc-shaped contact and a contact pressure spring are arranged on the outer wall of the socket core; the contact pressure spring is extruded between the contact and the inner wall of the socket shell; a coaxial taper contact is arranged in an inner cavity of the socket shell; four female end binding posts are arranged at the bottom of the socket shell; the female end binding posts are correspondingly connected with annular groove inner contacts and the taper contact through wires; three annular groove inner contacts are correspondingly connected with and communicate with the zero line, the U-phased contact and the V-phase contact respectively; and the taper contact is connected with and communicates with the W-phase contact.

The invention discloses a manufacture method of a solid insulating circuit device, which comprises the steps of: cleaning the surface of an electric conductor of a circuit device, preheating and then placing into a heated mould, and injecting a liquid epoxy resin composite material composed of silicon micropowder, epoxy resin and a curing agent into the mould; and taking a molded solid insulating circuit device blank from the mould after the epoxy resin composite material in the mould is cured, placing the blank into a baking oven for post-curing treatment, then carrying out sand blasting treatment on the surface of the blank except the part of the interface of the electric conductor to be insulated, coating a layer of conductive coating, carrying out evaporation treatment in the air, and then carrying out curing treatment in the baking oven to complete the manufacture of the solid insulating circuit device. Compared with the prior art, the invention can be used for effectively decreasing partial discharge values inside the solid insulating circuit device and surface inductive voltage of a product.

The invention provides an earthed telescopic meshed-type civil electrical connecting device as well as a plug and a socket thereof. The earthed telescopically-meshed civil electrical connecting device is particularly suitable for wired or wireless plugs, fixed or movable sockets, interconnecting couplers, appliance couplers and the like used for the indoor or outdoor. The earthed telescopically-meshed civil electrical connecting device comprises a rotary springback meshed-type electrical connecting plug and a rotary spirngback meshed-type electrical connecting socket, wherein the rotary springback meshed-type electrical connecting plug is provided with a metal contact A and the like, the rotary spirngback meshed-type electrical connecting socket is provided with a metal contact B and the like, and the metal contact A and the metal contact B are electrically connected through mutually meshing under the action of an earthed telescopic spring mechanism. The earthed telescopic meshed-type civil electrical connecting device has the advantages of wide application range, simple structure, simplicity and convenience in operation, reliable connection performance and capability of ensuring that earthed metal contacts are firstly connected, and then a firing line and a zero line are connected when the connecting device is spliced every time, ensuring that the firing line and the zero line are firstly disconnected, and then the earthed metal contacts are disconnected when the connecting device is pulled out, ensuring that the firing line and the zero line are uniform and reliable in contact pressure, ensuring safety and preventing accidental electric shock.

The invention relates to high-voltage safety technology, and particularly relates to an electric wire bird-nesting preventing mechanism based on a pressure bar structure. The mechanism comprises vanes, spherical hinges, telescopic rods, oil cylinders, cross bars, oblique struts, hinge sliding sleeves, inertia springs, inertia sleeves and an electric wire, wherein the power of the mechanism is derived from the natural wind energy; the wind is converted into mechanical energy when the wind acts on the vanes; the telescopic rods and the spherical hinges cause the vanes to rotate and swing downward without interferences; hydraulic oil within the oil cylinders is compressed, and the mechanical energy is converted into pressure energy, making the cross bars connected with the oil cylinders move so that liquid pressure energy is converted into mechanical energy again; and then power goes from the cross bar, the oblique struts, the hinge sliding sleeves and the inertia springs to the inertia sleeves to make the inertia sleeves perform reciprocating movements on the electric wire and knock off sundries acquired by birds for nesting on the electric wire. The mechanism of the invention utilizes the function of the natural clean energy which is wind energy, so that the mechanism can continue to play the role and the structure is reliable, and the practicability is high.

To provide a receptacle in which inadvertent electric shock can be prevented, and furthermore the thickness of the case can be made thinner. The receptacle has a case 1 which has a plug blade insertion port 12 for inserting a flat plug blade 210 of the plug in the front and a plurality of blade receiving springs 2 which are housed in the case and receive the flat plug blade inserted into the plug blade insertion port and are electrically connected to an electric wire extending from the outside. Each of blade receiving spring 2 is composed of a pair of spring pieces 21 mutually opposed with a prescribed distance in order to interpose the flat plug blade and a frame 2 to support the pair of spring pieces 210. The frame 2 is composed of a pair of side pieces 23 mutually opposed to each other with a distance wider than that of the pair of spring pieces, a connecting piece 24 which connects the pair of side pieces at the side, and a jointing piece 25 which is provided extended from the rear end on the opposite side to the plug blade insertion port of each side piece, and the pair of spring pieces 21 are extended from the rear end on the opposite side to the plug blade insertion port of each jointing piece.

The invention discloses a convenience type foam cutting device which comprises a base with a working table, vertical conductive rods, vertical guide sleeves covering the peripheries of the conductiverods, multiple electric heating wires, an upper conductive rod and a lower conductive rod. The upper conductive rod and the lower conductive rod are used for supplying power to the multiple electric heating wires and are connected with two poles of a power supply separately; sliding sleeves are detachably and fixedly connected to two ends of the lower conductive rod; a storage slot for storing thelower conductive rod and the sliding sleeves is formed in the upper side surface of the working table; the sliding sleeves are slidably arranged on the vertical guide sleeves in a sleeving mode and located in the storage slot of the working table; conductive sliding sleeves are detachably and fixedly connected to two ends of the upper conductive rod, are slidably arranged on the vertical guide sleeves in a sleeving mode and are connected with the vertical conductive rods; the sliding sleeves and the conductive sliding sleeves are connected onto the vertical guide sleeves through locking partsin a locking way; and the multiple electric heating wires are connected between the upper conductive rod and the lower conductive rod at intervals. The convenience type foam cutting device has the advantages of simple structure, convenience in processing and forming multiple foam models with different specifications, high processing efficiency and low use cost.

The invention relates to an electric connector, in particular to an electric connector with a multi-safety structure. The electric connector with the multi-safety structure comprises an insulating shell and an electric connecting terminal group, wherein the insulating shell comprises a front panel provided with a plurality of jacks, and the jacks form a path which a plug passes through and is electrically connected with electric connecting terminals. The electric connector is characterized by also comprising a safety mechanism. Because of the structure, the electric connector provides a multi-protection mechanism, has good protection effect and prevents a user or a child from error electric shock.

The invention discloses a push type safety socket, and belongs to the field of sockets. The push type safety socket comprises a dark box, a cover plate covers the upper end of the dark box, a mountingopening is formed in the cover plate, a movable block is arranged in the mounting opening, a slide block is fixedly connected to a pair of side walls of the mounting opening, first chutes are formedin a pair of side walls of the movable block, the slide block is in slide connection with the first chute, a second compression spring is connected between the upper end of the slide block and an upper side arm of the first chute, a groove is formed in the upper end of the movable block, a jack is formed in the bottom of the groove, the groove communicates with the interior of the dark box throughthe jack, a concave plate is arranged in the dark box, slide bars are fixedly connected to the two ends of the concave plate, and a second chute is formed in the inner side wall of the dark box. Thepush type safety socket disclosed by the invention can realize that a plug is more safer to insert and plug after the movable block is pressed, and when the socket is burnt, a user is likely to be burnt and subjected to electric shock.

The invention relates to the field of socket connectors and provides a single-direction plug and socket connection assembly which comprises a plug assembly and a socket assembly. The plug assembly comprises a single-direction plug housing, and the top face of the plug shell is coaxially provided with a cylindrical plug body which is coaxially provided with two annular grooves which are internally equipped with concave annular contacts, and two male end wiring terminals are connected to corresponding annular connectors through conductive wires. The socket assembly comprises a socket housing which is coaxially provided with a socket core which is provided with a center jack which is matched with the plug body. The outer wall of the socket core is provided with two annular grooves, and multiple radial countersink through holes are uniformly distributed in each of the annular grooves. Each of the countersink through holes communicates with the center jack and is internally equipped with an arc contact and a contact pressure spring. The head of the arc contact is in the shape of an arc, and the tail part of the contact expands and is limited by the step surface of a countersink port aperture. The contact pressure spring is pressed between the contact and the inner wall of the socket housing. The bottom of the socket housing is provided with two female end wiring terminals, and each of the female end wiring terminals is connected to a contact in an annular contact through a conductive wire.

The present invention provides an anti-electric shock electrical connector. The anti-electric shock electrical connector comprises an electrical connector male connector and electrical connector female bases. The electrical connector male connector comprises a male connector housing, an insulation body, conducting strips, a pedestal and springs. The conducting strips are installed at the outer surface of the insulation body which is fixedly connected with the pedestal located in the male connector housing, and the top end of the insulation body is provided with a threaded hole. the male connector housing is provided with motion holes, and the insulation body can drive the conducting strips to penetrate the motion hole and to be exposed out of the male connector housing. The springs sleevethe insulation body located between the male connector housing and the pedestal to form resumeelasticity. The electrical connector female bases are cavity structures internally provided with lotus-shaped contact pieces, the top ends of the electrical connector female bases are provided with screw installation holes, the openings at the bottom ends of the electrical connector female bases can allowthe insulation body in the electrical connector male connector to pass through. Screw rods with screws penetrates the electrical connector female bases to enter the threaded hole on the male connector insulation body, and the screw is twisted to allow the conducting strips in the male connector into the electrical connector female base to be in contact with the contact piece in the female base soas to connect with a circuit. The screw is loosened, and the conducting strips are taken back into the male connector housing under the action of the springs.

The invention discloses a novel LED lamp which comprises a power supply lamp base part and a lighting lamp part used for being connected with the power supply lamp base part in a matched manner. A first sliding groove is formed in the middle portion of the interior of the power supply lamp base part, a second sliding groove is formed below the bottom of the first sliding groove, a power supply groove is formed in the position, above the top of the first sliding groove, of the top wall of the interior of the power supply lamp base part, first sliding guide grooves are formed in the positions, on the two sides of the first sliding groove, of the inner side wall of the power supply lamp base part, and ejection sliding blocks are connected to the interiors of the first sliding guide grooves in a sliding and matched manner; an electric conduction column is arranged at the tops of the ejection sliding blocks in a manner of being opposite to the power supply groove, first springs are arranged at the tops of the ejection sliding blocks in the first sliding guide grooves, and a taper face groove is arranged between the first sliding groove and the second sliding groove; and sliding locking holes are symmetrically arranged at the positions, on the two sides of the second sliding groove, in the power supply lamp base part, and second sliding guide grooves are formed in the positions, close to one side of the second sliding groove, of the sliding locking holes. The novel LED lamp is simple in structure, convenient to install, high in stability after installation and capable of preventing accidental electric shock and improving safety.

The invention discloses a palm rejection type socket and electrical connection equipment, and relates to the technical field of electrical appliances. The palm rejection type socket comprises a shell,an elastic part, a press-against part, a conducting plate assembly and an electrical connection plate assembly. The press-against part is mounted in the shell and can move relative to the shell; oneside of the press-against part extends into a first chamber and a second chamber, and the other side of the press-against part is pressed against the shell by the elastic part; the conducting plate assembly is mounted at one side of the press-against part, which is close to the elastic part, and the conducting plate assembly and the electrical connection plate assembly are arranged at an interval;and the electrical connection plate assembly is mounted in the shell and is respectively connected with the first chamber and the second chamber. Compared to a socket in the prior art, due to adoption of the press-against part extending into the first chamber and the second chamber and the conducting plate assembly and the electrical connection plate assembly which are arranged at an interval, the palm rejection type socket provided by the invention can be conductive only when two insertion sheets are respectively inserted into the first chamber and the second chamber, and thus, an electric shock caused by false insertion is prevented, and the palm rejection type socket is safe, reliable and high in practicality.

The present invention provides an electric connecting method for plugs, sockets, mobile sockets, cable couplers, appliance couplers and the like of indoor and outdoor and the device thereof. The electric connecting device comprises a rotary rebound wedge type connecting head of a metal contact A with a guide positioning concave groove and a wedge face C and a rotary rebound wedge type connecting base of a metal contact B with a guide positioning convex platform and a wedge face D, and completes the electric connecting through the mutual wedge of the wedge face C of the metal contact A and the wedge face D of the metal contact B. The present invention has wide application range, guaranteed safety and can prevent accident electric shock (the conductor can not contact the conductive elements even if putting into the hole with opened hole. The connector has no exposure of electrical objects after connecting or during connecting, thereby effectively improving safety coefficient and preventing occurrence of accident electric shock.), thereby greatly reducing arc rising and preventing explosion transmission. The present invention has the advantages of easy acquisition of material, simple art, large amount of copper saving, low cost, standardization, reasonable structure, simple operation and reliable connection performance. The connecting device has self locking function in connection with the power source in particular and can not loosen off due to shock, attack and external force (at the time the connecting device are wedged with each other so as to form a clipping state with good performance of conduction, anti-shock, anti-attack and anti-falling and can be pulled out only through correct operation by hand) and has good electric connection effect.

The invention provides a quantitative water injection device of a voltage resisting test of an insulation glove. The water injection device comprises a support, a first pipeline, a second pipeline, at least water storing barrel and a glove clip. The first pipeline is arranged at the bottom of the support and used for injecting water towards the water storing barrels which communicate with the first pipeline. The glove clip is arranged on the upper part of the water storing barrel and used for fixing a to-be-tested glove. The second pipeline is arranged on the upper part of the support and injects water in the to-be-tested glove through a water injection pipe on the to-be-tested glove. According to the invention, the water injection device is simple in structure and precise in quantification; glove clamping operation is convenient; accidental electric shocks possibly caused by manual operation are avoided; and safety of test work is improved.

The invention provides an electric control cabinet with a protection function. The electric control cabinet is characterized by comprising an electric control cabinet body, a top part of the electriccontrol cabinet, side walls of the electric control cabinet, the interior of the electric control cabinet, heat dissipation nets, an electric control cabinet front door, an insulation protective door,wire inlets, an electric control cabinet front door, electrical components, an insulation protective door handle, insulation protective door wire arrangement holes, electrical component wiring ports,hinges A, hinges B and screws. Through the arrangement of the insulation protective door, when a worker opens the electric control cabinet front door accidentally, an accident caused by mistakenly touching an electrified body is avoided, and when the internal condition of the electric control cabinet needs to be observed, safe observation can be carried out through the insulation protective door,so that the safety of the working environment of the worker is ensured. Due to the design of the wire arrangement holes of the insulation protective door, the worker can orderly arrange the sequenceof wires during wire arrangement and wire insertion, and the occurrence of mistaken electric shock accidents caused when the worker arranges the wires can be more effectively avoided.

The invention discloses a novel resistor installer. The novel resistor installer comprises a lead, a serial seat and a resistor part for being connected with the serial seat in a matching manner, wherein the serial seat is serially connected to the middle end of the lead; two groups of suckers are uniformly arranged on the rear end face of the serial seat in upper and down directions; a first sliding groove is formed in the middle end in the serial seat; a second sliding groove is formed in the lower side of the bottom end of the first sliding groove; an energizing chamber is arranged on the top wall in the serial seat on the upper side of the first sliding groove; another first sliding grooves are formed in the inner side walls of the serial seat on two sides of the first sliding groove; a pressing plate is in sliding matched connection with the inner parts of the another first sliding grooves; an energizing rod arranged by corresponding to the energizing chamber is arranged at the top end of the pressing plate; first compressed springs are arranged at the top end of the pressing plate in the another first sliding grooves; a clamping groove is formed between the first sliding groove and the second sliding groove. The novel resistor installer disclosed by the invention has the advantages of simple structure, convenience in installation, high stability after installation and simplicity and convenience in replacement; accident electric shock is prevented, so that the safety is improved.

The invention discloses an electric appliance cabinet capable of preventing hot-line work. The cabinet comprises a cabinet body and an electric appliance element, a cabinet door is connected to the front of the cabinet body through a hinge, a locking piece is fixedly arranged on the inner wall of the cabinet door, the electric appliance element is arranged in the cabinet body, and a positive wire and a negative wire are arranged on the electric appliance element. The positive wire penetrates through the rear side wall of the cabinet body and is connected with a mains supply, the other end of the negative wire is fixedly connected with a conductive spring, a sliding groove is formed in the rear side wall of the interior of the cabinet body, an iron sliding block is slidably connected into the sliding groove, and an iron clamping piece is fixedly connected to the side wall of one side of the iron sliding block; and the iron clamping piece is fixedly connected with the other end of the conductive spring. The invention relates to the technical field of electric appliance cabinets. The principle that the spring can contract when conducting electricity is utilized to control the locking state of the cabinet door, so that when an electric appliance element circuit is not broken, the cabinet door cannot be opened, and dangers caused by live-line work due to the fact that an operator does not power off in time are prevented.

The invention belongs to the technical field of computers and particularly relates to a case with an electric leakage detection function. The case comprises a shell, a case switch located on the shell and a voltmeter mounted on the shell. The case with the electric leakage detection function can remind people that the case is alive in case of electric leakage; a mounted display screen is located nearby the case switch and in the place where people frequently touch the case, so that people can discover that the case is alive before touching the case and are reminded better, and accidental electric shock or electric leakage resulting in fire are avoided.

The present invention belongs to the field of power metering system equipment, and particularly relates to a terminal block for a single electric meter box. The terminal block comprises a terminal body. The upper surface of the terminal body is provided with four terminal posts. The outside of each terminal post is surrounded with a protective sleeve, and a spring sleeved onto the terminal post is arranged between the protective sleeve and the terminal post. The upper part of the protective sleeve is provided with a cover. The cover is provided with a connecting wire connected with the terminal body. The lower surface of the terminal body is provided with a wire incoming hole. The end portion of each terminal post and a wire pressing plate parallel to the side surface of the terminal post are arranged in the wire incoming hole. A compression screw vertical to the front surface of the terminal body is arranged on the plate surface of the wire pressing plate. The two sides of the terminal body are provided with terminal block installation holes. The terminal block can be used for the overall installation and replacement process of the single electric meter box. By means of the terminal block, the time and the labor are saved. Meanwhile, the process can be easily completed by a single person.

The invention discloses an intermediate-frequency electrical stimulation wearable terminal and an intermediate-frequency electrical stimulation wearable system. The intermediate-frequency electrical stimulation wearable terminal comprises a body (6) and an electrode slice (9) magnetically attracted to the body (6). The body (6) comprises: a rechargeable internal power supply (4) which supplies power to the intermediate-frequency electrical stimulation wearable terminal, a communication unit (7) which wirelessly receives the intermediate-frequency electrical stimulation information, a storage cell (3), wherein the storage unit (3) connected with the communication unit is used for storing the intermediate-frequency electrical stimulation information, a master control unit (1) which is in circuit connection with the rechargeable internal power supply (4) and the storage unit to generate an intermediate-frequency electrical stimulation current based on the intermediate-frequency electricalstimulation information, a stimulation current amplification unit (2) which is connected with the main control unit (1) to amplify and output the intermediate-frequency electrical stimulation current, and a solid-state magnetic conductor (8) which is used for magnetic attraction conduction and is in circuit connection with the stimulation current amplification unit (2).

The invention belongs to the field of high-voltage electricity safety technology, and particularly relates to an electric wire anti-bird-nesting mechanism based on a pressure bar structure. The electric wire anti-bird-nesting mechanism comprises a wind pendulum, a spherical hinge, a telescopic rod, an oil cylinder, a cross bar, an inclined supporting rod, an articulated sliding sleeve, an inertial spring, an inertial sliding sleeve and an electric wire, wherein the power of the mechanism is sourced from the natural wind energy, when the wind acts on the wind pendulum, the wind energy is converted to mechanical energy, the telescopic rod and the spherical hinge ensure that the wind pendulum performs rotation and downward swinging motion without interference, the hydraulic oil in the oil cylinder is compressed, the mechanical energy is converted to pressure energy, and thus the cross bar that is connected with the oil cylinder moves, the liquid pressure energy is converted to the mechanical energy again during the period, and then the power is delivered to the inertial sliding sleeve from the cross bar, the inclined supporting rod, the articulated sliding sleeve and the inertial spring to ensure that the inertial sliding sleeve can perform reciprocating sliding on the electric wire to knock off sundries that are used for birds to nest on the electric wire. According to the electric wire anti-bird-nesting mechanism disclosed by the invention, under the action of the natural clean energy-wind energy, the mechanism can continuously play the role and also is reliable in structure and relatively strong in practicability.

The invention relates to fast-assembling electric power working clothes provided with a voltage induction device. The sleeve of the working clothes is provided with a storage pocket. The voltage induction device is put in the storage pocket. The storage pocket keeps a tensioning state through a lacing assembly. The storage pocket in the tensioning state makes the voltage induction device abut against the sleeve. Through fixing effect of the lacing assembly, the storage pocket makes the voltage induction device more docile in the storage pocket and the voltage induction device is abutted against the arm of an inspection person. The storage type connection structure makes the arrangement of the voltage induction device more compact, and operation of the inspection person is not influenced at all. The voltage induction device is arranged with the working clothes through the storage pocket, and the voltage induction device is convenient to dismount and assembly, and is easy to maintain. After the voltage induction device is dismounted, the working clothes can be used in other places, thereby improving resource utilization rate.

The invention discloses an energy-saving sauna room. A sauna room body is internally provided with a vapor generating box, a plurality of air holes are formed in the box wall of the vapor generating box, a water source heat exchanger is arranged at the bottom of the vapor generating box, and communicates with a water inlet pipe and a water outlet pipe, cobblestones are laid on the water source heat exchanger, the water outlet pipe is arranged at the top of the vapor generating box, and a plurality of sprayers are arranged on the water outlet pipe. Hot water enters the water source heat exchanger through the water inlet pipe, the water source heat exchanger heats the cobblestones on the water source heat exchanger, and then the hot water is sprayed on the cobblestones through the sprayers to produce vapor; the cobblestones are heated through the hot water, the hot water reproduces the vapor, and thus electric energy is saved. According to the energy-saving sauna room, the structure is simple, the possibility of accidental electric shock is eliminated, the manufacturing cost is reduced, and economic benefits are improved.

The invention relates to a fireproofing switchgear cooling with fluid air and having sealed cabins. The fireproofing switchgear includes a cabinet and a plurality of independent cooling cabins detachably arranged in the cabinet; each cooling cabin includes a base, an arc-shaped cover plate which is arranged on the base, can be opened and closed, and protrudes outwards, and two baffle boards which are fixed on the base at both ends of the arc-shaped cover plate; the arc-shaped cover plate is a heat conductor having a smooth outer surface; the base, the arc-shaped cover plate, and the baffle plates enclose a sealed in-cover space; the end face of the base of the in-cover space is provided with an electrical function unit mount table for mounting an electrical function unit; long-strip shaped blowing ports are arranged in the base at the two outer sides of the arc-shaped cover plate along the boundary line of the arc-shaped cover plate and the base; and the blowing ports face the tangent direction of the boundary of the arc-shaped cover plate and the base. The fireproofing switchgear cooling with fluid air and having sealed cabins can effectively achieve cooling and waterproofing functions, the cooling energy consumption is low, the heat dissipation effect is good, and the fireproofing capability is strong.

The invention discloses a high-voltage frequency converter with a safety protection structure and a working method thereof. The converter comprises a protection box, wherein a damping support is installed in the center of an inner wall of the bottom of the protection box, a high-voltage frequency converter body is installed at the center of the top of the damping support, a lower sliding groove isformed in one side of the bottom of the protection box, a reciprocating screw rod is rotatably connected with the interior of the lower sliding groove, a gear motor in driving connection with the reciprocating lead screw is installed on one side of the bottom of the protection box, a sliding block sliding in the lower sliding groove is connected with the reciprocating lead screw in an engaged mode, the sliding block is fixed to the corner of one side of the bottom of the box door, and an electronic lock is installed in the center of one side of the protection box. The high-voltage frequency converter is novel in structure and ingenious in conception, accidental electric shock of workers can be prevented, the workers can be prevented from conducting maintenance work in an electrified stateof the high-voltage frequency converter body, and use safety is greatly improved.