362results about How to "Guaranteed to open normally" patented technology

The invention relates to a novel percutaneous aortic valve and pulmonary valve exchanger, which is a self-expand support with biological valve, formed by the support in special shape and made from nickel titanium alloy skeleton and the three-blade one-way opening valve formed by pig heart, wherein, the support has fixing and supporting functions, and the pig heart forms three valves fixed in the support. The invention has little hurt, high safety and reduced complication.

The invention provides an accessing method and system in belonging area for roaming user, the method includes following steps: when the roaming user accesses the network, if it applies the general name of accessing point APN, the gateway GPRS support node CGSN agent functional entity transmits the message from GPRS support node CGSN to belonging area GGSN, and the GGSN in belonging area processes the user messages and realize the data transmission of SGSN, and it realize the access in belonged area for roaming users. It can realize that the roaming GPRS user processes the requirement of GPRS service back to signed belonging area, and makes the local running trader can develop the incremental value business, ensure the GPRS is open to prepaid user, and realize the real-time charging of data service.

The invention provides a knotless needling machine, and belongs to the technical field of non-woven machinery. The needling machine comprises a rack, a needle beam, a needle beam driving mechanism, a needle hole board, a moving beam, a moving beam opening / closing mechanism and a moving beam lift adjusting mechanism, wherein an upper top plate is fixedly arranged on the top of the rack and a base plate is fixedly arranged at the bottom of the rack; a pair of upper beams are fixedly arranged on the upper top plate; a needle bed is fixed at the bottom of the needle beam; and needles are arrangedon the needle bed. The needling machine is characterized in that the right end of the moving beam is arranged on a vertical shaft; the vertical shaft is fixed between the upper top plate and the baseplate; the left end of the moving beam forms a free end; the moving beam opening / closing mechanism comprises an acting cylinder, a press arm and a press block; a carrier roller is arranged at one side, facing the press block, of the moving beam and a tension roller is arranged at the other side of the moving beam; and a limiting rod is fixedly arranged at the side at the right end of the moving beam. The needling machine has the following advantages: locking and opening of the moving beam can be guaranteed; when the limiting rod arranged on the moving beam is hindered by the vertical shaft, the opening of the moving beam is extremely limited; stable lifting of the moving beam is guaranteed; and the needling machine has a simple integral structure.

The invention discloses a vehicle window control system which comprises an additional switch positioned on the handle of the vehicle door, a vehicle door lock switch, a vehicle door switch and a vehicle window control module applied to control the lifting of the vehicle window. The additional switch, the vehicle door lock switch and the vehicle door switch are all connected with the vehicle window control module, and the vehicle door lock switch, when being opened, sends the control signals of lowering the window to the vehicle window control module; the additional switch, when being opened, sends control signals of lowering the window to the vehicle window control module; the vehicle door switch, when being opened, sends control signals of lowering the window to the vehicle window control module, and when being closed, sends control signals of raising the window to the vehicle window control module. The system is applicable to vehicles with flameless windows, can ensure normal opening and closing of the vehicle door and prolong the service life of sealing strips at the top and glasses for vehicle windows.

The invention relates to a three-tube multi-split air-conditioning system oil return or defrosting control method and a system thereof. The method includes the following steps that step1, a port of refrigerating / heating switching device and an output pipe of an air-conditioning external unit system through a bypass pipe, the bypass pipe is provided with a bypass electromagnetic valve, and whether an air-conditioning system enters the oil return or defrosting state or not is detected in real time; step 2, when the air-conditioning system enters the oil return or defrosting state, an air-conditioning heat recycling device is switched into the refrigerating mode; step 3, an electromagnetic expansion valve of a throttling part of the air-conditioning heat recycling device is turned off, and the bypass electromagnetic valve is turned on; step 4, after the air-conditioning system receives the ending signal of oil return or defrosting, the bypass electromagnetic valve is turned off, and the electromagnetic expansion valve of the throttling part of the air-conditioning recycling device is turned on. According to the three-tube multi-split air-conditioning system oil return or defrosting control method and the system thereof, coolants do not pass through a hydraulic module system, and the situations that the hydraulic module system is frozen due to the coolants, and thus pipes are blocked are avoided on the premise of meeting the oil return and defrosting requirements.

The invention discloses a selective laser melting single-knife two-way powder laying device. A scraping knife holder body is of a hollow structure with an upper opening and a lower opening. A powder feeding unit and a scraping knife mounting frame are both located in an inner cavity of the scraping knife holder body. The powder feeding unit comprises a powder feeding plate which can move relative to the scraping knife holder body in the powder laying direction. A powder storage tank is formed among the powder feeding plate, the scraping knife holder body and the scraping knife mounting frame. A powder falling channel is formed between the scraping knife holder body and the scraping knife mounting frame. The powder laying device moves towards one side to the space between the powder feeding unit and the whole scraping knife holder body, relative displacement occurs, the powder storage tank is opened, and powder falls to one side of a scraping knife along the powder falling channel; the whole scraping knife holder body moves reversely, and the powder storage tank is closed; and finally the whole scraping knife holder body and the powder feeding unit both move to the other side, and then powder laying is started. The invention further discloses SLM equipment comprising the powder laying device. The selective laser melting single-knife two-way powder laying device achieves the functions of two-way powder laying and automatic powder falling through one scraping knife, cost is reduced, and no powder pollution is ensured.

The invention discloses a thermoelectric type flame-out protection plug valve of a gas stove and a gas stove. The plug valve of the gas stove comprises a valve body, a valve core and a valve rod, wherein an air inlet hole, an electromagnetic valve hole and a plug valve hole matched with the valve core are arranged in the valve body, the air inlet hole is communicated with the electromagnetic valve hole, an electromagnetic valve is arranged inside the electromagnetic valve hole, the inner side of the electromagnetic valve hole is communicated with the plug valve hole through a containing cavity, and a lever mechanism used for starting the electromagnetic valve is arranged in the containing cavity; and the valve rod penetrates through the valve core to abut against the lever mechanism, the valve rod is in a two-section type and comprises a switch rod and a downward-pressing rod, one end of the switch rod is arranged outside the valve body, one end of the switch rod penetrates through the valve body, is matched with the valve core along the axial direction in a sliding mode and is positioned in a rotatable mode, the switch rod is provided with a rotary locking piece used for being matched with the gas stove, the downward-pressing rod penetrates through the valve core, one end of the downward-pressing rod abuts against the lever mechanism, the other end of the downward-pressing rod is in linkage with the switch rod through a valve rod spring, and the limit distance of the rotary locking piece for the switch rod is larger than a limit displacement produced when the downward-pressing rod pushes the lever mechanism. The gas stove comprises a shell body and the plug valve of the gas stove, wherein the plug valve is installed on the shell body.

The invention provides a new percutaneous aortic valve replacing device which is characterized by the rational designation, convenient usage and low operational danger, which is to solve problems of inconvenient stitching of valve and cradle and high danger of using saccule to expand aortic valve in current aortic valve replacing device, the device is an automatic buckling cradle carrying biological valve, comprising cradle in nickel-tantalum alloy framework and trilobular one-way opening valve composed of pig heart bag. The nickel-tantalum alloy possesses functions of fixing and supporting, the trilobular valve is fixed tightly in the cradle. The product is characterized by the small injury, high safety, reduced complication caused by aortic valve replacement, and wide application prospect.

The invention provides a shutdown discharging method and circuit of an LCD panel, the method comprises the following steps that when the LCD panel starts to shut down, grid signals on a scanning lineare kept in the set time period, and the electric potential of the input end of a PCBA circuit board of the LCD panel is kept; in the set time period, data signals on a data line are adjusted, the potential difference between a pixel electrode in the LCD panel and a common electrode of a color film substrate is kept in the set voltage difference range, and the LCD panel displays a black picture; after the set time period, the LCD panel is controlled to discharge. According to the shutdown discharging method and circuit of the LCD panel, when the LCD panel shuts down, poor shutdown displaying of the LCD panel cannot be observed by the user.

The invention discloses a refrigerator. The refrigerator comprises a refrigerator body, a door body used for opening and closing the refrigerator body and a hinge assembly connected with the refrigerator body and the door body; the refrigerator body comprises a containing cavity and an outer side face which is adjacent to the hinge assembly and located on an extending section of a rotating path ofthe door body, wherein the direction, facing the outer side face, of the containing cavity is a first direction; and when the door body is in an opening process, the hinge assembly drives the door body to move, in the first direction, away from the refrigerator body. According to the refrigerator, the hinge assembly can drive the door body to move, in the first direction, away from the refrigerator body, that is the door body moves in the direction away from the containing cavity, so that the opening degree of the refrigerator body can be guaranteed, and the problem that drawers, shelves andthe like in the refrigerator body cannot be opened due to interference of the door body is solved.

The embodiment of the invention provides a business data processing method and device based on a cloud platform. The method comprises the following steps: carrying out security detection of a submitted application object based on the cloud platform; when the application object passes the security detection, searching business data matched with the application object; carrying out security processing of the business data based on the cloud platform; and calling the application object in a designated container, and carrying out business processing of the business data which has been subjected to the security processing. The method and device provided by the invention has the advantages that the cloud platform has been authorized by cloud platform users in advance, so that the diversity of the business data can be greatly improved, and higher value of the business data can be achieved; and the cloud platform achieves big data operation capability through integration, and can provide a big data mining function for a third-party user, so that the capabilities of the third-party user for development, big data processing and big data exploration are improved, and effective products or analysis reports can be further produced.

The invention relates to a method for preventing an automotive power sunroof from being clamped. The existing method has the disadvantages of low precision, difficult installation, high cost and short service life. The method comprises: firstly, initializing a controller and a drive system of the power sunroof to obtain a travel N and an average output force F0 of a motor; secondly, performing operation according to the button input of the user or an instruction of an LIN bus; if the instruction is 'open', allowing the motor to start to rotate positively; and if the instruction is 'close', allowing the motor to start to rotate reversely. In the process of 'closing', if the sunroof is not closed completely, an instant output force Fn of the motor is calculated; if Fn is more than or equal to F0, the variation of an output force delta F is calculated; and if delta F is more than or equal to an anti-clamping threshold value H, the motor is started to rotate reversely. The anti-clamping threshold value of the method is adjustable and flexible; the sunroofs is positioned accurately according to position signals so as to open or close the sunroof completely; and the method has high precision and rapid speed for preventing the automotive power sunroof from being clamped.

The invention provides a method for cultivating table grapes in high-cold and high-latitude area in winter. The method comprises the following steps of building a garden, using a high-cold and high-latitude efficient energy-saving solar greenhouse to build the garden, planting and managing grapes, leaving grapes on vines to keep fresh, watering once when the grapes are grown, laying mulch films every other days, controlling the temperature in the greenhouse by controlling time for closing an air inlet, releasing a curtain and rolling up the curtain. When the external temperature decreases below 5 DEG C, thermal insulation is carried out to control the indoor temperature at 10 DEG C. When the external temperature decreases below -10 DEG C, the indoor temperature is controlled at 8 DEG C in day time and at 2 DEG C at night until the grapes are harvested to be sold. The grapes cultivated in the method can be harvested to be directly supplied to fruit markets, the step of storing and refreshing the grapes through chemical agents is removed, the problems of dry peduncles, grape falling, browning, rotting and the like are solved, refreshment of the grapes are achieved to the maximum degree, and meanwhile chemical agent residue is reduced. Furthermore, when the grapes are on grape vines, the sugar content of the grapes gradually increases, and the fruit quality is improved.

The invention belongs to the technical field of high-voltage power supply control and particularly relates to a method and a device for electrically controlling a high voltage circuit breaker to switch on or switch off. According to the technical scheme, the high-voltage circuit breaker is controlled by a contact signal of a control system to switch on or switch off, i.e., the control system drives to lead the circuit breaker to switch on, and the control system stops driving to lead the circuit breaker to switch off, particularly, the control system is not directly drive the coil of the circuit breaker for switching on or switching off, but control an intermediate relay, an on-delay relay and an off-delay relay, the three relays act to generate a switching-on short-time pulse signal and a switching-off short-time pulse signal with the time being adjustable from 1 to 60 seconds, thus ensuring that a distributed control system (DCS) can be switched off by the high-voltage circuit breaker in a failure and preventing the coil for switching on or switching off from being burnt up after being live for a long time. The invention has the characteristics of operation reliability, potential risk elimination and high operability and skillfully combines the advantages and overcomes the disadvantages in the prior art, thus ensuring that the DCS can be switched off by the high-voltage circuit breaker in the failure and preventing the coil for switching on or switching off from being burnt up after being live for a long time.

The invention discloses a fast-charging high-power winding column type lithium ion battery which comprises a positive pole piece, a negative pole piece and a porous isolating membrane, the positive pole piece, the negative pole piece and the porous isolating membrane are wound into a column type core body in sequence, a metal case is sheathed outside the core body, and an electrolytic liquid is injected into the metal case. The fast-charging high-power winding column type lithium ion battery is characterized in that a positive pole material is one or more than one of lithium cobalt oxide, lithium manganese oxide, three-element material, aluminum-doped nickel cobalt lithium, lithium iron phosphate and lithium vanadate; a negative pole material is one or more than one of graphite and lithium titanate. The positive current collector is a pretreated aluminum foil or aluminum mesh with the thickness of 8-30 micrometers; and the negative current collector is a copper foil, a copper mesh, a nickel-plated iron foil or a nickel-plated iron mesh with the thickness of 8-30 micrometers. An electrolyte in the electrolytic liquid is one or a mixture of lithium hexafluorophosphate and biethyl diacid lithium borate; and a solvent in the electrolytic liquid is a mixture of two or more than two of EC (Ethylene Carbonate), PC (Propylene Carbonate), DMC (Dimethyl Carbonate), DEC (Diethyl Carbonate), EA (Ethyl Acetate) and the like. In the invention, not only can high-power output of the battery be realized, but also the fast charging of the battery can be realized, and safety performance is high.

The invention relates to an air bearing-air rib combined-type film structure, comprising an air rib type framework, an air bearing film and a drag cable, wherein the air rib type framework is a framework-shaped structure combined from a plurality of air-inflated rib members, formed by the inflation of an air blower, and maintained in rigidity, so as to form a support framework for bearing a load; the air bearing film is paved on the periphery of the air rib type framework, and an air pressure difference between the inside and the outside is kept in an area surrounded by the air bearing film via air inflation; and the drag cable is fixedly connected with the outer side of the air bearing film via a diaphragm, and forms an integral structure with the air bearing film. Compared with the prior art, the air bearing-air rib combined type film structure disclosed by the invention can be used for effectively solving the problem of door opening of the air bearing type film structure, and has the characteristics of being good in economical efficiency, high in bearing capacity, convenient to install, easy to disassemble and assembly and the like simultaneously.

The invention relates to a multifunctional umbrella structure with holes. The multifunctional umbrella structure comprises ribs, an umbrella rod and an umbrella cover. The ribs are connected to the umbrella rod. The umbrella cover is connected to the ribs and provided with the through holes. The through holes are formed in the umbrella cover; when the wind is strong, the umbrella cover is not prone to being lifted up; when the multifunctional umbrella structure is used in the sun, part of sunshine can enter the multifunctional umbrella structure, a small amount of sunshine can be received while the sun-resistant effect is achieved, and the body immunity can be improved.

The invention discloses a vertical air shaft double-door type explosion-proof system, which mainly consists of a gable wall body (2), door bodies (3), a buffer framework (4) and a flexible buffer wall (5), wherein the gable wall body and the buffer framework are respectively fixed on a wellhead steel reinforced concrete base (1); small holes are respectively and correspondingly formed in upper and lower cross beams arranged at the left and right sides of the buffer framework at fixed intervals; the flexible buffer wall consists of a plurality of string-shaped buffer units; the string-shaped buffer units are correspondingly fixed in the small holes formed in the upper and lower cross beams arranged at the left and right sides of the buffer framework; the door bodies (3) are respectively arranged on a short upright post of the buffer framework (4) through a door shaft hinge (6); and the two ends of the door bodies (3) are supported on the gable wall body. The vertical air shaft double-door type explosion-proof system has the advantages that the fast explosion release and automatic resetting can be realized; higher explosion-proof performance is realized; and the vertical air shaft double-door type explosion-proof system is applicable to new and old air shaft building.

The invention discloses a plant pot assisting in growth. The plant pot includes a base, a rotary disc is arranged in the base, a water tank is arranged on the rotary disc, the water tank and the rotary disc rotate synchronously, the water tank is provided with a concave-shaped placement area, a flowerpot is arranged in the concave-shaped placement area, a support frame is arranged above the flowerpot, the support frame is arranged on a support column, the support column is arranged on the water tank, the support frame is provided with a plant growth light and a plurality of first spraying nozzles, the water tank is provided with a plurality of second spraying nozzles, the first spraying nozzles and the second spraying nozzles are all connected with a water supply pump, and the water supply pump sprays liquid which is in the water tank to plants in the flowerpot through the first spraying nozzles and the second spraying nozzles. The plant pot can assist the plants in growth, and the difficulty of artificial maintenance is reduced.

The invention discloses a refrigerator. The refrigerator comprises a refrigerator body, a door body and a hinge assembly, the refrigerator body comprises a containing cavity and a pivoting side connected to the hinge assembly, when the door body is opened to a first opening angle, the hinge assembly drives the door body to rotate in situ relative to the refrigerator body, when the door body is opened to a second opening angle, the hinge assembly drives the door body to move towards the containing cavity from the pivoting side, when the door body is opened to a third opening angle, the hinge assembly drives the door body to move towards the pivoting side from the containing cavity, and when the door body is opened to the maximum opening angle, the hinge assembly drives the door body to rotate in situ relative to the refrigerator body. According to the refrigerator, by means of the hinge assembly, the door body can be prevented from interfering with surrounding cabinets or walls in the opening process, the opening degree of the refrigerator body can be guaranteed as much as possible, and meanwhile it can be guaranteed that the door body is smoothly opened.

An overdrive motor valve with automatic meshing and de-meshing functions comprises a motor and a motor valve body; a projecting shaft of the motor is equipped with a driving gear, the motor valve body is internally equipped with a decelerating mechanism and an overdrive clutch mechanism, the rotation of the motor is transmitted to a rack-shaped valve rod to realize the opening operation of the valve, the decelerating mechanism is a four grade speed varying mechanism, and the transmission manner is: driving gear->driving a first grade duplicate gear->a second duplicate gear->a third duplicate gear->a fourth duplicate gear->a gear and an overdrive ratchet gear, a plane cam and an intermediate gear to rotate, when the intermediate gear rotates to mesh with the duplicate gears, the intermediate gear drives the duplicate gears to rotate to ensure the rack-shaped valve rod to carry out displacement to integrate with a valve core which is internally sheathed with a tower-shaped spring and a rubber sealing jacket, the head of the valve core is embedded into valve petals and the closing operation of the valve can be realized by the elasticity of the tower-shaped spring. The invention can ensure the reliability and service life of the motor valve in use.

The invention discloses a door opening and closing device and a door opening and closing control method. The door opening and closing device comprises a door opening and closing control module, a drive motor, a transmission part and a fixing shaft. The door opening and closing control module generates a door opening control signal or a door closing control signal. The drive motor drives the transmission part to work on the basis of the door opening control signal and the door closing control signal. The transmission part changes the direction of first torque output by the drive motor into the second torque direction perpendicular to the first torque direction, so that the fixing shaft rotates under the effect of torque in the second torque direction to drive a door body to be opened or closed. In combination with measures such as judgment of door body opening or closing angles, obstacle judgment and obstacle time judgment, the door body is controlled to be opened or closed automatically, in the closing process, the situations that a user forgets to close the door body, or due to the fact that exerted force is not enough, the door body is not closely tightly can be eliminated, it is ensured that the door body is closed absolutely under the non-fault state, and the technical problem that in the prior art, when the force exerted on the door body is not enough, closing is not tight is solved.

The invention discloses an anti-theft door lock. The anti-theft door lock comprises a lock body. A lock tongue support is mounted in the lock body. A plurality of lock tongues are fixed to the lock tongue support. A bevel tongue is further arranged on the lock body in a penetrating mode. A stretchable linkage device is arranged between the bevel tongue and the lock tongue support. An electronic unlocking induction controller and at least two electronic unlocking mechanisms are mounted in the lock body. Each electronic unlocking mechanism comprises a gear box, a motor, a worm and a rack. A sliding plate which is capable of sliding in the lock body is further arranged in the lock body. The gear box of at least one electronic unlocking mechanism is fixedly arranged on the sliding plate. The gear box of the other electronic unlocking mechanism is fixed to the lock body. An inside door rotary handle used for emergent mechanical unlocking is further mounted on the lock body. By means of the structure, the anti-theft door lock is better in anti-theft performance and is provided with the multiple electronic unlocking mechanisms and an emergent mechanical unlocking mechanism.

The invention discloses a fuel gas cock valve. The fuel gas cock valve comprises a valve body, a valve element, a valve rod and an ejector pin penetrating through the valve element, the valve body isprovided with a valve core hole for assembling the valve element and a cover plate for sealing the valve core hole, one end of the valve rod penetrates through the cover plate, a shifting fork is arranged on the side face of the end of the valve rod, a limiting groove matched with the shifting fork to limit rotation of the valve rod is arranged on the back face of the cover plate, the valve rod isof a sectional structure comprising a main rod and a shifting wheel which are linked, the shifting fork is arranged on the side face of the shifting wheel, the main rod and the shifting wheel are provided with a first end surface and a second end surface which are in contact in the process of pressing the valve rod respectively, a first spring which is in abutting connection with the shifting wheel and can drive the shifting wheel to be reset is arranged below the shifting wheel, the ejector pin penetrates through the shifting wheel and is connected with the main rod, and a gap is formed between the first end surface and the second end surface before the cock valve is opened. According to the fuel gas cock valve, the stroke of the pressing of the valve rod is increased, an electromagneticvalve can be opened by the ejector pin, and the ignition failure is avoided.

The invention relates to a sieve pipe self-locking switch controller. The sieve pipe self-locking switch controller is mainly composed of a conical sliding rail connector, a movable stirring block, a spring pressing cap, a reset spring and a front guiding head. Two to six dovetail grooves evenly distributed in the circumferential direction of the axis are machined in a conical structure body of the conical sliding rail connector. The movable stirring block is of a round flaw structure, and T-shaped sliding rails are machined on the bottom face, arranged in the dovetail grooves of the conical sliding rail connector and are in sliding fit. A rod head is machined at the front end of the movable stirring block, the top end of the rod head makes contact with one end of the spring pressing cap, and the spring pressing cap is arranged on a shaft outer sleeve of the front guiding head and is in sliding fit. The reset spring is arranged between the spring pressing cap and the front guiding head shoulder part. The end of the front guiding head is a conical body. The sieve pipe self-locking switch controller is used in cooperation with a sand control sieve pipe with a self-locking switch, one or more sand control sieve pipes at the assigned position under a well can be controlled according to the actual needs and can be made to put into production or quit production, and accordingly the purposes of flow adjusting, water controlling and production system optimizing are achieved.

The invention discloses a laser weakening process for a seamless airbag. The laser weakening process comprises the following specific steps: (1) spraying glue on a dashboard upper body framework and a 3D-mesh; (2) sticking the dashboard upper body framework to the 3D-mesh; (3) putting the dashboard upper body framework stuck with the 3D-mesh into an oven for heating; (4) spraying the glue on the dashboard upper body framework stuck with the 3D-mesh and a leather surface; (5) sticking the dashboard upper body framework with the 3D-mesh to the leather surface; (6) making vacuum absorption on the dashboard upper body framework; (7) punching through holes and shallow holes on the dashboard upper body framework by lasers with different proportions and along different weakening trajectories. The laser weakening process of the seamless airbag provided by the invention can not only meet the requirement of weakening strength, but also avoid obvious marks on the appearance.

The invention discloses a thermoelectric type flame-out protection plug valve of a gas stove and a gas stove. The plug valve of the gas stove comprises a valve body, a valve core and a valve rod, wherein an air inlet hole, an electromagnetic valve hole and a plug valve hole matched with the valve core are arranged in the valve body, the air inlet hole is communicated with the electromagnetic valve hole, an electromagnetic valve is arranged inside the electromagnetic valve hole, the inner side of the electromagnetic valve hole is communicated with the plug valve hole through a containing cavity, and a lever mechanism used for starting the electromagnetic valve is arranged in the containing cavity; and the valve rod penetrates through the valve core to abut against the lever mechanism, the valve rod is in a two-section type and comprises a switch rod and a downward-pressing rod, one end of the switch rod is arranged outside the valve body, one end of the switch rod penetrates through the valve body, is matched with the valve core along the axial direction in a sliding mode and is positioned in a rotatable mode, the switch rod is provided with a rotary locking piece used for being matched with the gas stove, the downward-pressing rod penetrates through the valve core, one end of the downward-pressing rod abuts against the lever mechanism, the other end of the downward-pressing rod is in linkage with the switch rod through a valve rod spring, and the limit distance of the rotary locking piece for the switch rod is larger than a limit displacement produced when the downward-pressing rod pushes the lever mechanism. The gas stove comprises a shell body and the plug valve of the gas stove, wherein the plug valve is installed on the shell body.