55results about How to "Large adjustment stroke" patented technology

The invention discloses an axial vernier device for a lens with a flexible ring piece structure, belonging to the field of adjustable compensation and functional compensation of a photoetching projection objective. The axial vernier device aims to solve the problems that the adjusting routine is short, the adjusting precision is low and the bearing capacity is small in the prior art. The axial vernier device comprises an axial fine tuning component, a lens component, three micrometric displacement drivers and three micrometric displacement sensor components; the lens component comprises a lens frame and the lens; the micrometric displacement sensor components comprise micrometric displacement sensors and sensor connection plates; the axial fine tuning component comprises a lens cone, an upper flexible ring piece, a lower flexible ring piece and a driving ring; the driving ring is driven to realize up-and-down movement through the micrometric displacement drivers, the flexible deformation of the upper flexible ring piece and the lower flexible ring piece can be realized, and the minor axial adjustment of the lens can be realized. According to the axial vernier device for the lens with the flexible ring structure, the lens is supported and conducted for displacement adjustment through the flexible ring piece structure, the adjusting routine is long and the bearing capacity is large, and the axial adjustment precision of the lens can be guaranteed by being simultaneously controlled by the three micrometric displacement sensors.

The invention relates to a drawer pull-out guide (4), comprising a body rail (5) to be fastened to a furniture body (2), an in particular metal drawer rail (7) to be fastened to the drawer (3), and an adjusting device (16) for adjusting the height of the drawer (3) relative to the drawer rail (7), wherein the adjusting device (16) has an adjusting part (19), which is supported so as to be movable along a guiding track (18) to a limited extent in order to adjust the height of the drawer (3), wherein the guiding track (18) is designed as an opening in a leg (7b) of the drawer rail (7) extending vertically in the usage position, wherein the guiding track (18) extends at an angle to the horizontal.

The invention relates to a novel reaction type sand making machine. The front end surface and the rear end surface of the inner part of a machine frame are provided with lining plates, three plate hammer rotors are arranged in the centre of the machine frame, the left sides and the right sides of the three plate hammer rotors are respectively provided with reaction frames, the outer sides of the reaction frames are movably connected with reaction frame adjusting devices, and protection covers are covered at the outer sides of the reaction frames. The strength of plate hammers is improved, the utilization rate of the plate hammers is improved, a material is saved, and a resource is saved. Each plate hammer is in gapless fit with a plate hammer pedestal A, so that a clamping part formed by each plate hammer and the plate hammer pedestal is firm, sand can be quickly formed, the production volume is high, and the power consumption per cubic sand is reduced. Because of a converter system, the rotation speed of each plate hammer can be continuously improved during the attrition process, the stable reaction force of the rotors can be kept, the production efficiency is improved, the sand forming quality is improved, and the requirements on the heights of springs are reduced. The reaction frame is relatively durable, and the adjusting travel is large. The novel reaction type sand making machine has the characteristics of strong durability, novel and simple structure and convenience for operation and maintenance.

The invention relates to a child safety seat for a vehicle. The child safety seat is convenient for front and rear regulation, angle regulation and headrest regulation, low in cost and simple to operate. A front and rear regulating assembly, an angle regulating assembly and a headrest regulating assembly are arranged on the child safety seat disclosed by the invention; two mounting and fixing assemblies can be linked together through the structure of the front and rear regulating assembly so as to realize the synchronous regulation; through pressing or loosening an angle regulating button, a second gear lever is connected with a second clamping groove or separated from the second clamping groove so as to limit and loosen a seat back, when the seat back moves on the seat front and rear, an angle between the seat back and a base is changed, and the seat back can be locked at different positions on the base so as to regulate the angle of the seat back; the headrest regulating assembly can control a headrest to slide and lock relative to the seat back, the regulation is convenient, and regulating strokes are long.

The invention discloses an airplane cabin door intelligent installation method based on an AGV intelligent parallel robot. According to the airplane cabin door intelligent installation method based onthe AGV intelligent parallel robot, the AGV intelligent movement robot is used in cooperation a six-degree-of-freedom platform and a binocular vision system, and a technological method of multi-axisposture alignment and accurate installation operation of an airplane cabin door or a light intermediate part is changed. Aiming at installation of the airplane cabin door, the invention discloses theAGV intelligent parallel robot matched with the method. The robot is creatively designed in the aspects of the integral structure, the linkage manner between an AGV body and a parallel platform, the structure of the parallel platform and the like, and can achieve automatic and intelligent installation of the airplane cabin door. Compared with a traditionally manual or semiautomatic installation technology, the accuracy, the efficiency and the safety of cabin door installation are remarkably improved, the number of workers, the labor intensity and the requirement for skills are greatly reduced,and the method and the robot represent the trend that nowadays, the aeronautic equipment manufacturing industry develops in the direction of digitization, automation and intelligence.

The invention relates to a fitting (10), especially for mounting wall cupboards, comprising a mounting plate (11) having a cut-out section (14) into which an eccentric disk (20, 20', 20'') having an opening (23, 23') is inserted, a screw (40) extending through said opening (23, 23'). The fitting is characterized in that the opening (23, 23') on the eccentric disk (20, 20', 20'') is designed in such a manner that the eccentric disk (20, 20', 20'') can be placed on the shank of a wall-mounted screw (40, 40') having a screw head and the mounting plate (11) can be vertically and horizontally adjusted relative to the screw (40, 40') by rotating the eccentric disk (20, 20', 20''). The invention further relates to two angle fittings (101, 201), especially for mounting wall furniture, to a multi-part fitting (301), especially for wall mounting, and to a method for producing a multi-part fitting (301).

The invention discloses a water-saving valve element and a fluid supply system thereof. Valve element modes include the single cooling mode and the single heating mode. Control handle placement positions include the regulating area and the lower stop position. Valve element states include the opening state and the closing state. The water-saving valve element is characterized in that when a control handle is located in the lower stop position in the single cooling mode, the water-saving valve element is in a saving state or a critical state in the single cooling mode, and when the control handle is located in the lower stop position in the single heating mode, the water-saving valve element is in the closing state; and alternately, when the control handle is located in the lower stop position in the single heating mode, the water-saving valve element is in the saving state or the critical state in the single heating mode, and when the control handle is located in the lower stop position in the single cooling mode, the water-saving valve element is in the closing state. The water-saving valve element is beneficial for saving water, can facilitate control over a fluid supply device through a valve, can particularly facilitate control over the supply temperature of hot fluid of the hot fluid supply device, and can facilitate normal use of the hot fluid supply device.

The invention discloses mechanical engineering multifunctional suspension equipment. The equipment comprises a support plate; the top of the support plate is fixedly connected with a lifting mechanism; the top of the lifting mechanism is provided with a rotating mechanism; the surface of the rotating mechanism is provided with an extension mechanism; an electric winding mechanism is mounted at theend, away from the rotating mechanism, of the extension mechanism; the lifting mechanism comprises a first telescopic column; then bottom end of the first telescopic column is fixedly connected withthe top of the support plate; a second telescopic column is slidably connected into the first telescopic column; a first driving mechanism is mounted at the bottom of a cavity of the first telescopiccolumn; an output shaft of the first driving mechanism is provided with a smooth rod; and a first screw is fixedly connected with the top, away from the first driving mechanism, of the smooth rod. Theequipment has the advantages of adjustable lifting height, distance and direction, and the problems that in the prior art, lifting devices are simplx in function and low in universality are solved.

The invention belongs to the field of rolling mill operation, and relates to a non-polar oblique wedge adjustment mechanism, which at least comprises a screw, a proximity switch, a hydraulic motor, two supporting seats, two oblique sliding blocks, a photoelectric encoder and a PLC (programmable logic controller), and is characterized in that: the two supporting seats are fixedly arranged on a rolling mill housing, and the two oblique sliding blocks are fixedly arranged at the same side of the screw by nuts; sliding grooves matched with the oblique sliding blocks are arranged on the two supporting seats, and the oblique sliding blocks are arranged in the sliding grooves of the supporting seats; and the hydraulic motor is connected with the screw by a shaft coupling, and a non-polar oblique wedge adjustment device is connected with the PLC controller, is controlled by the proximity switch arranged on the screw, and is also connected into a computer by the photoelectric encoder. The non-polar oblique wedge adjustment mechanism integrates a hydraulic and electronic control technology with a mechanical device, has the characteristics of large adjustment stroke, simple and compact structure, safe and reliable performances, high automation of operation, and convenience in setting, and can be used in various large-scale rolling mill operating lines.

The invention discloses a corrugated tube stop valve which comprises a handle wheel, a valve rod, a stuffing assembly, a corrugated tube assembly, a valve cover, a valve body and a valve element which are arranged from top to bottom, wherein the stuffing assembly comprises a stuffing box, a stuffing ring, stuffing and a stuffing pressure cover; the stuffing is filled in the stuffing box; by virtue of the stuffing pressure cover, the stuffing is in tight contact with the valve rod, so that sealing between the stuffing and the valve rod is realized; a ring-shaped slot is formed in the stuffing ring, and is communicated with a Z-shaped runner arranged in the stuffing box, so that when a corrugated tube is cracked, a fluid medium in the stop valve flows to a pressure transmitter arranged at an outlet of the Z-shaped rubber through the ring-shaped slot and the Z-shaped runner, and therefore, leakage alarm is realized. Meanwhile, the invention designs a novel special ceramic valve element connecting structure; and hardness of high-toughness ceramic is greatly improved relative to hardness of a conventional overlaying hard alloy valve element, so that the service life of the valve element is greatly prolonged.

The invention discloses a multi-axis optical anti-shake and focusing device, a camera module and electronic equipment. The multi-axis optical anti-shake and focusing device includes: an SMA optical anti-shake actuator including a fixed plate, a movable plate, and a first SMA wire connecting the fixed plate and the movable plate; at least two upper SMA actuators connected to the movable plate and comprising second SMA wires and driven parts, wherein the second SMA wires are electrified to contract to drive the driven parts to move along the Z axis; and a mirror bracket body, wherein each drivenpart is connected on the mirror bracket body. The at least two upper SMA actuators are arranged to drive the different driven parts on the mirror bracket body to move along the Z axis, and the mirrorbracket body can rotate, so that the multi-axis optical anti-shake and focusing device can compensate the influence caused by lens deflection in a rotating mode, and the imaging quality is improved.

In order to exert a suitable restoring force in a device (10) for guiding at least one line of a joint arm robot (1), a restoring mechanism (40) is designed to exert an elastic restoring force. The restoring mechanism comprises a guiding unit (42, 20) and a slider element (28) movably mounted on the guiding unit. An elastic restoring unit is arranged between the slider element (28) and the guiding unit (42, 20), said restoring unit having at least one deflecting element, which is preferably designed as a deflecting roller (44, 60), and a flexible strand-like connecting element (46, 66).

The invention discloses a clearance elimination gear and method with a torque measurement function and for numerical-control equipment. The clearance elimination method relates to the clearance elimination gear and an adjustment device. The clearance elimination gear comprises a rear gear body, a front gear body and a three-leg sleeve. A mounting groove is formed in the middle of the front gear body. According to the clearance elimination gear and method with the torque measurement function and for the numerical-control equipment, the torque between the two gear bodies can be adjusted within awide range, and the numerical value of the torque can be displayed, so that the application of clearance elimination gears with various diameters is facilitated; repeated calculation of the spring force and repeated manufacturing of springs of various specifications are not needed, and data can be fed back, so that study on straight-tooth clearance elimination gears and popularization of the industrial standard are facilitated; compared with tension springs, compression springs can be adjusted within a larger range in a relative space; the structure is compact, so that the problem that the torque cannot be adjusted within a wide range in a narrow annular area is solved; and the specific numerical value of the torque can be obtained through the cooperation of the adjustment device and a digital-display torque spanner, and the purpose of data feedback is realized.

The invention provides a coiled material tension control system which comprises a fixed plate, fixed rollers and movable rollers. The coiled material tension control system is characterized in that the fixed rollers and the movable rollers are respectively located on the two sides of the fixed plate in sets, one end of each movable roller is mounted on a sliding plate, a rodless air cylinder and a linear displacement sensor which are in parallel are further mounted on the fixed plate, and the sliding plate is connected with an air cylinder sliding table of the rodless air cylinder and a sliding block of the linear displacement sensor. The rodless air cylinder applies pushing force which pushes the sliding plate to be away from the fixed roller set to the sliding plate all the time, the pushing force is in balance with the preset tension of coiled materials, when the balance between the pushing force and the preset tension is broken, the sliding block moves and sends out signals to a control unit, and when the displacement of the sliding block exceeds a preset range, the control unit gives instructions to adjust the rotating speed of an unreeling motor. The coiled material tension control system is simple in structure and convenient to mount and debug, the adjusting travel is large and can be set with numerical values, the response speed is high, equipment is compact in structure and small in size, and mounting space is saved.

The invention discloses a micro motor mechanism, which is used for adjusting the position of an element to be adjusted. The micro motor mechanism comprises a frame, a driving shaft, a primary driving device and a secondary driving device, wherein the driving shaft is arranged in the frame; the primary driving device is used for driving the driving shaft to move relative to the frame; the secondary driving device is arranged on the top of the driving shaft; the element to be adjusted is arranged on the secondary driving device; the element to be adjusted is driven by the secondary driving device to move relative to the top of the driving shaft; thus, a large driving travel can be realized by using the primary driving device, and high resolution can be realized by using the secondary driving; meanwhile, the invention also discloses a driving method of the micro motor mechanism; in the method, large driving travel is realized by using the primary driving device, and high resolution is realized by using the secondary driving; and the method is simple and convenient.

The invention discloses a valve device and a fluid supply system thereof. The valve device is provided with a first fluid inlet end, a second fluid inlet end and a fluid outlet end. An operation area of an operation mechanism is divided into a mixing degree adjusting area for adjusting the mixing degree of first fluid and second fluid, and a flow adjusting area capable of always adjusting the fluid outlet end flow of the whole mixing degree adjusting area. The mixing degree adjusting area is divided into a first fluid area with a fluid outlet end only discharging the first fluid, a mixing area with a fluid outlet discharging a mixture of the first fluid and the second fluid, and a second fluid area with a fluid outlet end only discharging the second fluid. The flow of the minimum stop position of a flow adjusting area in the first fluid area of the operation mechanism is larger than zero, and the flow of the minimum stop position of a flow adjusting area in the second fluid area of the operation mechanism is equal to zero. The valve device and the hot fluid supply system thereof are beneficial for saving fluid passing through the valve device and can facilitate normal use of a hot fluid supply device.

The invention belongs to the technical field of pressure adjustment, and particularly relates to a bidirectional pilot-operated type pressure regulating valve. The pressure regulating valve comprisesa high-pressure selecting valve, a pilot pressure adjusting mechanism and a main valve. An oil patch A and an oil path B connected with an external hydraulic system are formed in the main valve, and communicate with inlets in the two ends of the high-pressure selecting valve correspondingly, and an outlet of the high-pressure selecting valve communicates with the pilot pressure adjusting mechanism. The bidirectional pilot-operated type pressure regulating valve is simple in structure and high in reliability.

The invention discloses a delay-adjustable breaker which comprises a transmission piece, a rotating adjustment device, a releasing device, thermomagnetic systems with adjustable triggering pieces and an adjustment piece. The adjustment piece can rotate through a rotating hole and is installed on the transmission piece in a linearly-moved mode. An adjustment groove of the adjustment piece is mechanically coupled with an adjustment rod of the rotating adjustment device, an adjustment face of the adjustment piece is mechanically coupled with a transmission face on the transmission piece, and a trigger part of the adjustment piece is mechanically coupled with a releasing rod or a triggered piece on the releasing device. A first distance adjustment mechanism is arranged between the adjustment face of the adjustment piece and the transmission face of the transmission piece, and / or a second distance adjustment mechanism is arranged between the trigger part of the adjustment piece and the releasing rod or the triggered piece of the releasing device, so that the effective distance for adjusting a current setting value is achieved through the first distance and / or the second distance along with axial movement of the adjustment piece. Adjustment is accordingly not influenced by structures of the mechanisms and a shell any more, the adjustment stroke is large, and the delay-adjustable breaker is simple in structural design, convenient to manufacture and stable in working performance.

An object preparation device for preparing an object in a particle beam apparatus includes at least one cutting device, at least one cutting bevel for cutting the object, where the cutting bevel is arranged at the cutting device, at least one movably embodied object receptacle device having an object receptacle for receiving the object, and at least one drive unit for moving the object receptacle device from a first position of the object receptacle device into a second position of the object receptacle device. The first position of the object receptacle device is an initial position. The second position of the object receptacle device is an analysis and / or processing position of the object receptacle device. An observation axis (OA) extends through the object receptacle when the object receptacle device is arranged at the second position.

The invention relates to a toothed belt tensioning device and a cigarette material belt conveyer. The toothed belt tensioning device comprises a bottom fixing mechanism, an adjusting mechanism and a tensioning press wheel, wherein the bottom fixing mechanism is fixedly arranged on a rack; the adjusting mechanism is arranged on the bottom fixing mechanism; the tensioning press wheel is arranged on the adjusting mechanism; the tensioning press wheel is positioned on the inner side of a toothed belt; the tensioning press wheel can be driven through the adjusting mechanism to move towards the outer side of the toothed belt to tension the toothed belt in an outward tensioning manner. The toothed belt is tensioned in the form that the toothed belt is tensioned towards the outer side through the tensioning press wheel, so the adjusting stroke is large, the toothed belt can be effectively tensioned, mutual interference of the tensioning press wheel, a driving wheel and a driven wheel is prevented, and the phenomenon that the toothed belt is sheared and torn by a belt pulley can be avoided.

A tensioning device with tension and gravity capable of being adjusted synchronously and on the lower portion of an elevator comprises a counter weight mechanism (device) and a lever. A lever adjusting mechanism (device) is installed on an enclosure on the lower portion of the elevator and connected with one end of the lever, the other end of the lever is connected with the counter weight mechanism, the middle of the lever is connected with a lever rotation shaft mechanism (device) through a sliding supporting plate, and the lever rotation shaft mechanism is connected with a steering chain wheel assembly or a belt pulley assembly on the lower portion of the elevator. The lever adjusting mechanism is a nut lead screw mechanism. A left tensioning device with tension and gravity capable of being adjusted synchronously and on the lower portion of the elevator and a right tensioning device with tension and gravity capable of being adjusted synchronously and on the lower portion of the elevator are arranged on the lower portion of the elevator. The tensioning device is balanced in tension, effectively prevents the steering chain wheel assembly or the belt pulley assembly on the lower portion of the elevator from deviating from a chain or a belt, and is reliable in running.

The invention discloses a fluid supply system which comprises at least one valve device and a fluid supply device. A fluid outlet of the fluid supply device communicates with fluid inlet ends of the various valve devices, and a fluid supply situation of the fluid supply device is controlled by controlling the flow rates of the fluid inlet ends according to operating mechanisms of the valve devices. The fluid supply system is characterized in that operating positions of the operating mechanism of each valve device comprise, besides a closed position where the flow rate of the corresponding fluid outlet end is zero, at least two limit stop positions where the flow rates are different. According to the fluid supply system, fluids passing through the valve devices can be saved by adopting the valve devices; in addition, the valve devices can provide feedback information for the fluid supply device, especially for a hot fluid supply device, and the realization of the control on the fluid supply device, especially the control on the hot fluid supply temperature of the hot fluid supply device, through valves is facilitated.

The invention provides an air compressor crank double-end synchronous positioning and clamping device. The device comprises a clamping mechanism and a positioning mechanism which are oppositely arranged, the clamping mechanism and the positioning mechanism comprise moving assemblies driven by oil pressure, a clamping jaw assembly is fixedly connected to the moving assembly of the clamping mechanism, an ejector pin is arranged on the moving assembly of the positioning mechanism, the clamping mechanism and the positioning mechanism are driven synchronously, the two ends of a workpiece can be positioned through the positioning mechanism and the clamping mechanism which are arranged respectively, meanwhile, oil can be fed synchronously to drive and adjust the position, it is guaranteed that the two ends act synchronously, in addition, the clamping mechanism is pushed through oil feeding in the middle, and compared with traditional end pushing, the adjusting stroke is greatly increased; andthe device can be used for larger workpieces, the size of the device is kept small, so that the device is suitable for small machine tools.

In order to apply a suitable restoring force in the device (10) for guiding at least one path of the articulated arm manipulator (1), a restoring mechanism (40) for applying an elastic restoring force is formed. The reset mechanism comprises a guide unit (42, 20) and a slide element (28) movably supported on the guide unit. Between the sliding element (28) and the guide unit (42, 20) is arranged an elastic reset unit, which has at least one deflection element preferably configured as a deflection roller (44, 60) and a flexibly curved, strip-shaped Connecting elements (46, 66).

The invention relates to sheet punching, in particular to a sheet punching device and a punching method of the sheet punching device. The sheet punching device comprises a cutter bar connected with a drilling machine, wherein the lower end of the cutter bar penetrates through a cutter frame bar, the cutter frame bar comprises a connecting arm and a fixing arm, the connecting arm penetrates through the lower end of the cutter bar in the radial direction and is fixed to the lower end of the cutter bar through a locking pillar, an included angle in the vertical plane is formed between the fixing arm and the connecting arm, and a blade is fixed to the lower end of the fixing arm. The sheet punching device has the advantages of being capable of adjusting machining sizes according to machining needs, not needing to replace cutters when machining holes of different sizes, saving machining time, being simple to operate, not needing secondary machining, being high in machining accuracy and the like.

The invention discloses a valve device and a fluid supply system thereof. The valve device is provided with a first fluid inlet end, a second fluid inlet end and a fluid outlet end. An operation area of an operation mechanism is divided into a mixing degree adjusting area for adjusting the mixing degree of first fluid and second fluid, and a flow adjusting area for adjusting the fluid outlet end flow of the mixing degree adjusting area. The flow of minimum stop positions of flow adjusting areas in a first fluid area and a second fluid area of the operation mechanism is larger than zero, and the flow of the minimum stop position of a flow adjusting area in a mixing area is equal to zero. The valve device and the hot fluid supply system thereof are beneficial for saving fluid passing through the valve device and can facilitate normal use of a hot fluid supply device.

The invention discloses a computer desk with a hand lifting function. The computer desk comprises a desk body, a mainframe base and drawers are arranged at the two sides of the lower end of the desk body respectively and connected with one another through a partition plate, a desk plate is arranged at the tops of the mainframe base and the drawers, a keyboard support is arranged at the lower end of the middle of the desk plate, and a hand lifting assembly is arranged at the edge of the desk plate at one side of the keyboard support through a connecting device; the connecting device comprises aslide rail fixed to the side wall of the desk plate, a sliding shaft set which is composed of multiple sliding shafts is connected to the inner side of the slide rail through a sliding rail groove, aclamping part, a second compressed spring and a fixed screw plate are arranged on the sliding shaft set in sequence and located at the outer side of the slide rail, one end of the second compressed spring fits the fixed screw plate, and the other end of the second compressed spring is arranged in the clamping part through a locating step. According to the computer desk with the hand lifting function, a user can lift the elbow when operating a mouse, and the computer desk is convenient to operate and high in applicability and has a good lifting effect.

The invention discloses a computer desk with a hand lifting function. The computer desk comprises a desk body, a mainframe base and drawers are arranged at the two sides of the lower end of the desk body respectively and connected with one another through a partition plate, a desk plate is arranged at the tops of the mainframe base and the drawers, a keyboard support is arranged at the lower end of the middle of the desk plate, and a hand lifting assembly is arranged at the edge of the desk plate at one side of the keyboard support through a connecting device; the connecting device comprises aslide rail fixed to the side wall of the desk plate, a sliding shaft set which is composed of multiple sliding shafts is connected to the inner side of the slide rail through a sliding rail groove, aclamping part, a second compressed spring and a fixed screw plate are arranged on the sliding shaft set in sequence and located at the outer side of the slide rail, one end of the second compressed spring fits the fixed screw plate, and the other end of the second compressed spring is arranged in the clamping part through a locating step. According to the computer desk with the hand lifting function, a user can lift the elbow when operating a mouse, and the computer desk is convenient to operate and high in applicability and has a good lifting effect.

The invention discloses a single-handle double-joint water valve core and a fluid supply system with the single-handle double-joint water valve core. A valve device is provided with a first fluid inlet end, a second fluid inlet end and a fluid outlet end. An operating region of an operating mechanism is divided into mixing degree adjusting regions for correspondingly adjusting the mixing degree of first fluid and the mixing degree of second fluid and flow adjusting regions for adjusting the flow of the fluid outlet end of the valve device in the mixing degree adjusting regions. The flow of the minimum stop of the flow adjusting region of a first fluid region and the flow of the minimum stop of the flow adjusting region of a second fluid region are both larger than zero, and the flow of the minimum stop of the flow adjustment region of a mixing region is equal to zero. The valve device and the hot fluid supply system with the valve device have the beneficial effects that the fluid passing the valve device can be saved, and the normal use of a hot fluid supply device can be facilitated.