563 results about "Foot Switch" patented technology

To provide a drug package binding device that frees an operator from works of continuously stepping on a foot switch that imposes the burden on the operator and releasing the foot switch at the right timing, and enables a drug package binding work to be performed easily and without errors.SOLUTION: In a drug package binding machine 1 as a drug package binding device which comprises a first gear such as a rotatable first gear 4a and a second gear such as a second gear 4b, in which multiple drug packages are inserted in an overlapping manner to an engagement part of the first gear and the second gear, and the multiple drug packages are bound by the first gear and the second gear, there is provided rotational drive means such as a drive motor 5 which rotationally drives any of the first gear and the second gear. The drug package binding device automatically stops after rotationally driving for the prescribed number of revolutions by the rotational drive means after the binding operation starts.SELECTED DRAWING: Figure 15

The invention belongs to the field of precise assembly of aero-engine accessories, and relates to an electric deburring tool for a through hole of a small-aperture part, which solves the problem that the inner cavity (inner hole) of the part is narrow and cannot be deburred, and comprises a tool bit, a soft transmission part and a motor, and the rear end of the tool bit is connected with the motor through the soft transmission part. The oil stone tool bit is applied to the field of deburring of through hole parts of small-aperture parts and complex cavity structure parts, the oil stone tool bit can be used for deburring and polishing, the edge is smoothly transferred after deburring, and the deburring effect is excellent; the oil stone tool bit is long in service life and suitable for batch processing; the soft transmission part is good in flexibility, can be freely and properly bent in the machining process, and can be suitable for different application scenes; the motor is controlled by a pedal switch, so that equipment and parts can be conveniently controlled by two hands.

The utility model relates to the technical field of shoemaking equipment, in particular to a pneumatic heel lasting machine which comprises a machine frame, a machine box, a control screen, a foot switch, a supporting table mechanism and a sweeping knife tightening mechanism, a machine frame platen is arranged on the machine frame, universal wheels are arranged on the lower portion of the machine frame, the machine box is arranged on the upper portion of the machine frame, the control screen is arranged on the upper portion of the machine box, and a supporting table seat plate is arranged on the machine frame platen. A supporting table seat plate is arranged on the machine box, sweeping knife tightening supports are arranged on the portions, on the two sides of the supporting table seat plate, of the machine frame table plate, the supporting table mechanism is arranged on the supporting table seat plate, sweeping knife tightening mechanisms are arranged on the upper portions of the sweeping knife tightening supports, and a positioning height detection device is arranged in the portion, on the upper portions of the sweeping knife tightening mechanisms, of the machine box. The pneumatic structures act uniformly and softly in cooperation with an air storage tank, the upper pulling and pressing effects are stable, the whole machine is easy to operate and maintain, electric energy consumption is reduced, heat emission is reduced, and the low-temperature investment cost of a plant is reduced.

The utility model discloses a pedal pedal switch, which comprises a base and a pedal, the base is provided with a seat body, the top surface of the seat body is provided with a rectangular frame body, the pedal side wall of the pedal is rotatably arranged on the frame body side wall of the rectangular frame body through a rotating shaft, the rectangular frame body is internally provided with a micro switch and a reset spring, and the micro switch is connected with the reset spring. A rotating shaft is arranged on the base, an annular groove is formed in the rotating shaft, a supporting column is arranged in the rectangular frame body of the base, an adjusting screw is arranged on the supporting column, and the adjusting screw is inserted into the annular groove. According to the utility model, the end part of the adjusting screw is inserted into the annular groove, so that the rotating shaft is limited leftwards and rightwards, the rotating shaft is prevented from moving leftwards and rightwards, the position of the rotating shaft is kept unchanged after long-time use, the rotating shaft is prevented from falling off and losing efficacy, the reliability is improved, and the service life is prolonged.

The invention belongs to the technical field of medical equipment, and relates to a key structure and a foot switch device, the key structure comprises a first shell, a button assembly and a circuit assembly; the first shell is provided with a first through hole; the button assembly comprises an elastic pressing piece, the circuit assembly comprises an elastic conductive piece, and the elastic pressing piece and the elastic conductive piece are arranged on the two sides of the first shell respectively and right face the first through hole. The elastic coefficient of the elastic pressing piece is larger than that of the elastic conductive piece, the elastic pressing piece extrudes the elastic conductive piece when being stressed, and the elastic pressing piece rebounds or tends to rebound when the elastic conductive piece deforms to the limiting position. When the elastic pressing piece extrudes the elastic conductive piece, under the condition that the elastic conductive piece deforms to a limit position due to overlarge stress, the elastic pressing piece rebounds or forms a rebounding trend to absorb redundant external force, and the situation that overlarge pressure is continuously applied to the circuit assembly is avoided, so that the risk that the circuit assembly is damaged is reduced, and the circuit assembly is effectively protected.

The invention relates to the technical field of medical instruments, in particular to a double-sided anti-fog amplification mouth mirror which comprises a mirror body, a rotary connecting mechanism, a micro-channel cleaning system and a handle assembly. A lens main body is formed by fixing a plane mirror (A surface) and an aspheric magnifying lens (B surface) in a back-to-back manner, and a steering engine drives a central connecting rod to realize quick switching of double functions. The lens body is further provided with a heating anti-fog module, the micro-channel system is integrated in the lens frame, the annular distribution cavity is of a double-layer independent structure, the upper layer is communicated with the inclined spraying holes, normal saline is directionally sprayed for preventing fog and removing dirt, and the surface of the lens body is clear through heating of the heating anti-fog module. And the lower layer is communicated with a suction hole to recycle dirt under negative pressure. The handle is integrated with a control button, a foot switch controls washing / suction separately, and single-hand operation is achieved. The problems of view limitation, mirror surface fogging, pollution and single function are systematically solved, and the diagnosis and treatment efficiency and accuracy are remarkably improved.

The utility model discloses a switch assembly for bicycle parking equipment, the bicycle parking equipment comprises a pillar (1) and a parking frame (2), the pillar (1) is vertically arranged, the parking frame (2) is transversely arranged, the inner end of the parking frame (2) is vertically and slidably arranged on the pillar (1) through a sliding seat (2.1), the lower part of the parking frame (2) is provided with the switch assembly (3), and the switch assembly (3) is arranged on the pillar (1). The sliding seat (2.1) and the supporting column (1) are limited by the switch assembly (3), a driving assembly (4) is arranged in the supporting column (1), the driving assembly (4) drives the sliding seat (2.1) to lift through a steel wire rope (6), the switch assembly (3) comprises a safety structure (3.1), and the safety structure (3.1) comprises a foot switch (3.1. 1), a mounting seat (3.1. 2), a safety lock tongue (3.1. 3), a safety connecting rod (3.1. 4) and a safety lock block (3.1. 5). According to the switch assembly for the bicycle parking equipment, a user can unlock a parking frame with feet.

The invention discloses assembly equipment for automobile oil pipe clamp machining, which comprises a support frame, the top of the support frame is fixedly connected with a support table, and the support table is provided with a clamping mechanism for tensioning and assembling a pipe clamp snap ring and a first support mechanism for containing the pipe clamp snap ring. A discharging mechanism used for discharging assembled pipe clamps is arranged at the top of the supporting table, and a second supporting mechanism used for containing pipe clamp buckles is arranged on the front face of the supporting table. By means of the arrangement mode that the pneumatic chuck, the mounting plate, the driving piece, the tensioning block and the foot switch are matched, the foot switch drives the pneumatic chuck to drive the driving piece through foot stepping, the tensioning block drives a limiting column to move, the interior of a clamping ring arranged on the limiting column in a sleeving mode is opened, two lugs on the clamping ring are close to each other, and the clamping ring is clamped. And the clamping ring and the clamping buckle of the automobile oil pipe clamp can be assembled conveniently, and the labor intensity of workers can be relieved conveniently.

The utility model discloses a rubber stripping machine for stripping rubber outside a bunch, which comprises a clamping block assembly, a cutter assembly, a baffle block, a first driving device, a second driving device, a third driving device and a fourth driving device, the baffle block is positioned at the side part of the cutter assembly, the first driving device drives the clamping block assembly to transversely clamp or loosen the bunch, and the second driving device drives the third driving device to transversely clamp or loosen the bunch. The second driving device drives the cutter assembly to transversely cut the outer rubber of the bunch or loosen the bunch, the third driving device drives the cutter assembly to move back and forth in the horizontal plane so as to be away from or close to the clamping block assembly, and the fourth driving device drives the check block to move in the horizontal plane so as to adjust the distance between the check block and the cutter assembly. The rubber stripping machine disclosed by the utility model is simple in structure, can be operated only by controlling the actions of the first driving device, the second driving device and the third driving device (for example, through a foot switch), is very convenient to operate, and is suitable for rubber stripping operation of manufacturers for producing and processing bunches in small batches.

The invention discloses a multipurpose fructus aurantii picking machine. The multipurpose fructus aurantii picking machine comprises a picking mechanism, a lifting mechanism and a transportation control mechanism, the picking mechanism is connected to the surface of an upper bottom plate of the lifting mechanism, and the lifting mechanism is detachably arranged on the surface of a bearing platform at the front end of the transportation control mechanism; the picking mechanism comprises a handheld moving rod, a collecting sub-mechanism, a camera shooting sub-mechanism and a rotary connecting sub-mechanism; the lifting mechanism comprises an upper bottom plate, a lower bottom plate, a connecting assembly and an air cylinder assembly. The transportation control mechanism comprises a front end bearing platform, a transportation platform, a collecting basket, a displayer, a control table, an air source assembly, a seat, a pneumatic foot switch, a storage battery and a power chassis. The fructus aurantii picking machine solves the technical problems that in the prior art, a fructus aurantii picking machine is single in function, low in picking efficiency and frequent in missing picking.

To provide a foot switch and surgical device for ophthalmic surgery that offer improved operability. [Solution] The oscillating part of the side switch rotates and oscillates left and right around a rotation axis extending in the front-rear direction, within a predetermined oscillation range between an inner standby position when the side switch is not operated and an outer operating position when the side switch is operated. The side switch biasing part biases the oscillating part toward the standby position within the oscillation range. When the oscillating part is in the standby position, the point of application of the force required to operate the push switch is located inside a virtual reference plane extending vertically upward from the rotation axis of the oscillating part. When the oscillating part begins to rotate and oscillate from the standby position toward the operating position, the height of the point of application gradually increases as it moves outward from the standby position.

The utility model discloses a core withdrawing device for processing a gauge rod sleeve, which is characterized in that a sliding rail is arranged on the upper surface of a workbench, a sliding table is matched with the sliding rail in a sliding connection manner, and a clamp is arranged on the sliding table; the clamp comprises a lower clamping seat and an upper clamping seat which can be opened and closed relatively, the lower clamping seat is fixed with the sliding table, the upper clamping seat can be driven by an air cylinder to move up and down and be locked, and the air cylinder is connected with a foot switch located below the workbench; a clamping cavity used for clamping a sleeve is formed between the lower clamping seat and the upper clamping seat, a plurality of clamping strips made of rubber are arranged on the inner wall of the clamping cavity, and the multiple clamping strips are annularly arranged at intervals; a rotating motor is further fixed to the upper surface of the workbench, a motor shaft of the rotating motor faces the clamp and is coaxial with the clamping cavity, and an inner hole clamping head matched with the sleeve inner core is fixed to the motor shaft. The mold core can be automatically taken out after the sleeve is subjected to injection molding, and the machining efficiency is improved.

The utility model discloses an airport pavement degreasing device, and particularly relates to the technical field of airport pavement cleaning, the airport pavement degreasing device comprises a bottom frame, the top end of the bottom frame is fixedly provided with a liquid storage tank; the cleaning mechanism comprises four second telescopic rods fixedly arranged at the bottom end of the bottom frame, a first movable plate is fixedly arranged at the bottom ends of the four second telescopic rods, and an oil suction assembly and a cleaning assembly are arranged at the bottom end of the first movable plate; and a second movable plate is fixedly arranged at the bottom ends of the four third telescopic rods. According to the utility model, the oil absorption assembly and the cleaning assembly are used for primarily cleaning oil stains, then the mopping assembly is used for wiping and recycling mixed liquid, and the cleaning mechanism and the mopping assembly can be lifted through the foot switch A and the foot switch C, so that one worker can clean the oil stains on the road surface; the cleaning workload is greatly reduced, the treatment time is short, and the cleaning treatment efficiency is high.

The utility model provides an electrostatic sensitive device welding control device, and belongs to the technical field of electrostatic sensitive device welding control. The technical problem to be solved is to provide the improvement of the hardware structure of the electrostatic sensitive device welding control device. According to the technical scheme, the electric soldering iron comprises a time power-on controller, an electric soldering iron power source and a foot switch, a microcontroller, a display module, a time setting module and a time relay are arranged in the time power-on controller, and the signal input end of the time relay is connected with the microcontroller. The power supply input end of the time relay is connected with the power supply input end of the time power-on controller, and the power supply output end of the time relay is connected with the power supply output end of the time power-on controller; the microcontroller is further connected with a display module and a time setting module through wires, and the signal input end of the microcontroller is connected with a foot switch through a quick plugging aviation socket. The welding device is applied to welding of electrostatic sensitive devices.

A kind of manual control type point glue machine and point glue method, the point glue machine includes: pressure vessel, support, two-component point glue valve being installed in support, two pipelines being communicated two glue inlets of two-component point glue valve and the pressure vessel, glue nozzle being combined two glue outlets of two-component point glue valve, foot switch, with two-component point glue valve and foot switch electric connection, controller for controlling two-component point glue valve and switch between three kinds of states of double pass, single pass and closed.The method includes: controlling two-component point glue valve in double pass state, and quickly glue to product;After quick glue, control two-component point glue valve in single pass state, and slowly glue to the product.Waves and bubbles generated by early quick glue can be eliminated by later slow glue.

This utility model proposes an electronic detonator bundling system, including a base, a telescopic column fixedly installed at the top of the base, the telescopic column being inclined, a fixing cylinder fixedly installed on the side wall of the telescopic column, a foot switch electrically connected to one side of the base, a plug-in cylinder sleeved on the fixing cylinder, and multiple first piston cylinders evenly fixedly connected to the inner wall of one side of the plug-in cylinder. After the operator steps on the foot switch, the device stably expands, pushes, and then resets the rubber sleeve, thus smoothly completing the bundling work. The operation is simple and convenient, and the operator does not need to operate with one hand, realizing semi-automation of the bundling work, which improves work efficiency to a certain extent. Moreover, the finished product can be grasped with both hands throughout the process, which can effectively prevent the finished product from loosening again. The rubber sleeve is in place in one step without secondary adjustment, and the finished product is neat and tidy after bundling.

A UI for a HMD system includes a HMD configured to be worn by a surgeon. A tracker is configured to track head gestures by the surgeon. A footswitch is configured to detect foot motion inputs by the surgeon. A computer couples to the HMD, the tracker, and the footswitch. A user interface includes the HMD, tracker, and footswitch. The use interface is configured to: provide to the computer the head gesture in association with the foot motion input, and display an image relating to a surgical procedure on the HMD. The computer is configured to: apply the head gesture received in association with the foot motion input to perform a first action on the HMD system when the HMD system is in a first system mode, and perform a second action on the HMD system when the HMD system is in a second system mode.

The utility model discloses a wireless medical foot switch structure which comprises a base, a pedal mounting groove is formed in the base, a pedal is arranged in the pedal mounting groove, a first waterproof microswitch is arranged at the lower end of the pedal, a waterproof groove is formed in the lower end face of the base, and a second waterproof microswitch is arranged in the waterproof groove. A wireless transmitting circuit board is arranged in the waterproof groove and connected with a first waterproof microswitch, a battery assembly is arranged at one end of the wireless transmitting circuit board and comprises a battery bin, a battery is arranged in the battery bin, and a battery cover is arranged at the outer end of the battery bin. An O-shaped sealing ring is arranged between the battery cover and the outer port of the battery compartment; a waterproof bottom plate is arranged at the lower end of the base, and the waterproof bottom plate and the lower end face of the base are detachably arranged. The technical scheme is reasonable in structural design, convenient to use, good in waterproof performance and good in practicability.

The invention relates to a mobile device extension for training equipment that enables targeted intensification of the eccentric training phase. The extension consists of a base plate, a motor housing with drive shaft, motor and control unit mounted on it, and a belt or cable system. By manually operating a hand or foot switch, the user can increase the resistance during the downward movement while the exercise is in progress, as the weight is additionally pulled downwards by a motor. The design allows for flexible use on various training devices without permanent screw mounting, thereby increasing the training effect. The device extension is modular, portable, and allows for the operation of several devices in series via an integrated power outlet.

The utility model relates to the field of nailing, in particular to a nailing device which comprises a gun body, a ventilation mechanism and a foot switch, the gun body comprises a pneumatic control seat and a nailing mechanism, the pneumatic control seat is provided with a nail pushing cavity, the nailing mechanism comprises a nail pushing assembly movably connected with the pneumatic control seat, and the nail pushing assembly divides the nail pushing cavity into an inlet cavity and an outlet cavity; the air exchange mechanism is mounted on the pneumatic control seat, and an air inlet and an air outlet are formed in the air exchange mechanism; the air exchange mechanism is electrically connected with the foot switch, and the air exchange mechanism enables the air inlet and the air outlet to be communicated with the inlet cavity and the outlet cavity respectively through the foot switch, or enables the air outlet and the air inlet to be communicated with the inlet cavity and the outlet cavity respectively, so that the nail pushing assembly is driven to move back and forth. By adopting the automatic nailing machine, the labor intensity is reduced, and the nailing quality is ensured.

The utility model discloses an automatic cleaning device for an end cover of a lightning arrester, and relates to the related technical field of lightning arresters. The cleaning device comprises a cleaning tank, a foot switch, a sealing cover, a clamping rod and a motor, the foot switch is arranged below the motor, the output end of the motor penetrates through a bottom plate and is fixedly provided with a cleaning shaft, the upper end of the cleaning shaft is provided with a cleaning brush, the upper end of the cleaning tank is covered with the sealing cover, two symmetrical through grooves are formed in the sealing cover, and a sliding rod is fixed in each through groove. Clamping springs are fixed to the ends, close to each other, of the two through grooves, a clamping rod is arranged at the center of the sealing cover in a penetrating mode, each hinge piece is hinged to a clamping jaw, and a clamping plate is fixed to the upper end of each clamping jaw. By arranging the cleaning tank, the motor, the cleaning brush, the clamping rod, the clamping plate, the clamping jaw, the clamping spring and the sealing cover, the problems that the cleaning efficiency of the lightning arrester end cover is low, cleaning is not thorough, a stable clamping structure is lacked, and the smell of a cleaning agent used during lightning arrester cleaning is too large are solved.

The utility model relates to the technical field of endoscopes, in particular to endoscope equipment based on a wireless transmission technology, which comprises an endoscope control mainboard, a wireless pedal device and a camera component, the wireless pedal device comprises a pedal switch, a first encryption module and a first wireless transmitting module; the endoscope control main board comprises a first wireless receiving module, a first decryption module and a main control CPU (Central Processing Unit); the first encryption module carries out data encryption on a photographing signal or a video recording signal generated by the foot switch and sends the data to the endoscope control mainboard through the first wireless transmitting module. And the first wireless receiving module receives a photographing signal or a video recording signal sent by the first wireless transmitting module, decrypts the photographing signal or the video recording signal through the first decryption module, and transmits the decrypted signal to the main control CPU to control the camera assembly to execute corresponding operation. The pedal switch does not need to be connected with the endoscope main board through a transmission cable, and the problems that the cable is prone to being interwoven and pulled apart, a socket is prone to being damaged due to frequent plugging and unplugging of the cable, and reliability is poor are solved.

1. The name of this design product: foot switch. 2. Purpose of this design product: This design product is used for medical robots. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: Stereoscopic diagram 1.

The invention relates to a foot switch with a housing (1) and a pedal (3) which is pivotally mounted on a bearing axis (16) relative to the housing (1), wherein upon pivoting in an actuating direction from a rest position, the pedal (3) acts on a spring-biased switching unit (2), and wherein the pedal (3) can be pivoted beyond the rest position into a cleaning position, counter to the actuating direction.The foot switch is characterized in that at least one fixed sleeve (41, 43) and at least one rotary sleeve (42, 44) are arranged axially next to one another on the bearing axis (16), wherein the fixed sleeve (41, 43) is rotationally fixed to the housing (1) and the rotary sleeve (42, 44) is rotationally fixed to the pedal (3), and wherein the fixed sleeve (41, 43) and the rotary sleeve (42, 44) each have at least one run-on slope (413, 433, 423, 443) which slide on one another in at least one pivoting angle range which is located between the rest position and the cleaning position, as a result of which the fixed sleeve (41, 43) and the rotary sleeve (42, 44) move axially away from one another against a spring force when the pedal (3) is moved counter to the actuation direction.

An electrosurgical system includes an electrosurgical generator having a radio frequency source configured to operate in a plurality of modes and a controller configured to control the radio frequency source to output a radio frequency waveform corresponding to a mode from the plurality of modes. The system also includes a footswitch assembly coupled to the electrosurgical generator. The footswitch assembly includes a footswitch in communication with the controller. The footswitch is configured to output a footswitch activation signal to activate the radio frequency source. The footswitch assembly also includes a mode select button, which upon activation, is configured to instruct the controller to enter a mapping state during which the controller assigns an activation command for one mode from the plurality of modes to the footswitch.

The utility model discloses a food additive production packaging machine which comprises a main machine frame, a rotating tray, a packaging film installation support, a packaging film, a foot switch, a limiting sleeve support, a tensioning support, an installation vertical frame, a braking air cylinder and a braking lower pressing disc. According to the packaging machine for food additive production, a box body is placed at the position of the rotating tray, the packaging film is manually operated to sequentially bypass the position between the guide rotating roller and the limiting vertical rod and then wrap the box body, the packaging film is placed on the rotating tray, the packaging film is placed on the packaging film mounting bracket, and the packaging film is placed on the packaging film mounting bracket. A downward pressing spring of a limiting sleeve support is matched with the downward pressing disc to downwards press a packaging film paper tube, the paper tube rotates at a low speed under friction force, the packaging film obliquely penetrates through the position between a guide rotating roller and a limiting vertical rod, and at the moment, a film body is in a tightened state; and the sealing performance of packaging of the packaging film is improved.

The utility model discloses a medical foot switch with an integral glue filling structure, and relates to the technical field of medical facilities. The device comprises a bottom plate and a frame assembly fixedly installed on the upper surface of the bottom plate, the frame assembly comprises a middle partition piece and two end blocking pieces arranged on the two sides of the middle partition piece, and the middle partition piece is connected with the two end blocking pieces through transverse connecting pieces; a first connecting groove is formed in one side face of the end blocking piece, second connecting grooves are formed in the two sides of the middle separating piece, a through hole is formed in one end of the transverse connecting piece in the length direction, one end of the transverse connecting piece extends into the first connecting groove and is fixed, and the other end of the transverse connecting piece extends into the second connecting groove and is fixed. According to the utility model, the middle separator and the two end part stoppers arranged on the two sides of the middle separator are assembled into the frame assembly, then the frame assembly is fixed with the bottom plate, and paint is sprayed, so that each gap can be effectively blocked by the paint, glue leakage is avoided, and the frame assembly is suitable for integral glue filling.

The utility model discloses a riveting tool for iron galvanized sheet production, which relates to the technical field of riveting tools, and comprises a steel base, a foot switch is placed on the steel base, a protective cover is arranged on the upper side of the foot switch, a pin rod is arranged on one side surface of the protective cover in a penetrating manner, a tension spring is arranged on the pin rod in a penetrating manner, a limiting pin is inserted on the pin rod, and the limiting pin is arranged on the other side surface of the protective cover. And a rubidium magnet block is arranged on the lower side surface of the foot switch. Through the arrangement of the foot switch and the rubidium magnet block, the foot switch is attracted to the steel base through the rubidium magnet block, the foot switch is prevented from shaking on the base, and it is guaranteed that an operator operates the rivet pressing equipment.

The utility model provides a foot switch, and belongs to the technical field of medical instruments. And two pedal buttons and three pedals are arranged, so that the device can be matched with surgical equipment with various output modes for use. Due to the design of the two pedal buttons, switching of energy output modes can be achieved; the three pedals can respectively control on and off of a circuit, and the linear switch can realize linear control of output. And the three pedals adopt different colors, so that a user can quickly and timely identify and use a proper pedal. And the bosses are arranged between the pedals, so that a user can be prevented from treading and sliding or treading the two switches at the same time, and misoperation is avoided. According to the foot switch provided by the invention, switching of multiple modes and circuit control under single-mode operation can be completed conveniently and efficiently, and the operation is simple and very convenient.

The utility model belongs to the technical field of fuel gas equipment, and discloses a double-gas fuel gas foot switch which comprises a base, an upper cover, a pedal and a switch spring, two valve assemblies are arranged on the base side by side, each valve assembly comprises a valve body fixedly arranged on the base, the rear side face of each valve body is inwards provided with a gas inlet and a gas outlet, and the top face of each valve body is downwards provided with a valve hole; an air inlet hole communicating the air inlet with the valve hole and an air outlet hole communicating the air outlet with the valve hole are formed in the valve body, a baffle is arranged at the bottom of the valve hole, a valve rod is vertically arranged in the valve hole in a sliding mode, a reset spring is arranged between the valve rod and the baffle, and the top end of the valve rod penetrates through the valve body, protrudes upwards and is arranged close to the bottom face of the pedal. By arranging the two valve assemblies, gas and combustion-supporting gas are supplied at the same time and cut off at the same time, and resource waste is reduced; only one gas inlet and one gas outlet are formed in the valve body, the gas inlet and the gas outlet are communicated or blocked through cooperation of the valve rod and the valve hole, and the risk of gas leakage is reduced.