57results about How to "Avoid direct connection" patented technology

The utility model relates to a piston compressor which comprises a power assembly and a compression assembly. The power assembly comprises a power mechanism, an output shaft, a driving wheel and a driven wheel, the output shaft penetrates through the driven wheel, the driving wheel is in transmission connection with the driven wheel, and the power mechanism is used for driving the driving wheel to rotate so as to drive the driven wheel to rotate, so that the driven wheel drives the output shaft to rotate around the axis of the output shaft. The compression assembly comprises a reciprocating body, a rolling piece, a piston and a cylinder body. The piston is arranged in the cylinder body, the rolling piece is embedded in the reciprocating body, and the reciprocating body is connected with the piston. The two ends of the output shaft are each connected with a shaft head, the rolling pieces of the compression assemblies located on the corresponding sides are clamped in the guide grooves of the shaft heads, so that the shaft heads are in linkage connection with the corresponding reciprocating bodies, and when the shaft heads rotate to enable the rolling pieces to move along the guide grooves, the reciprocating bodies drive the pistons to conduct reciprocating compression in the cylinder bodies. According to the scheme, the power mechanism drives the driving wheel to drive the driven wheel to rotate, the connecting structure is simplified, and simple and reliable transmission of the power mechanism is achieved.

The invention relates to the technical field of filters, in particular to an anti-interference combined filter which comprises a shielding box, the shielding box comprises a bottom plate, a plurality of resonance parts are evenly and fixedly installed on the top face of the bottom plate, a plurality of cavity partition walls are fixed to the top face of the bottom plate, and the anti-interference combined filter is characterized in that side plates are fixed to the two sides of the top face of the bottom plate; ventilation plates are fixed to the two ends of the top face of the bottom plate, and each ventilation plate comprises a supporting panel. According to the invention, the interior of the ventilation plate is rotatably connected with a plurality of arc-shaped sealing plates, air flow transmitted through the ventilation plate each time is buffer air flow between two adjacent arc-shaped sealing plates, and the arc-shaped sealing plates separate the shielding box from the outside. The internal environment of the shielding box is effectively prevented from being communicated with the outdoor environment when the shielding box carries out air flow exchange heat dissipation, and electromagnetic shielding of the shielding box is not affected by ventilation and heat dissipation of the shielding box while ventilation and heat dissipation of the shielding box are guaranteed.

The invention discloses a split air-cooled air conditioner in the technical field of air-cooled air conditioners, which comprises an air conditioner main body, an upper mounting seat is fixedly mounted at the upper end of the air conditioner main body, an upper connecting plate is fixedly mounted at the upper end of the upper mounting seat, a plurality of groups of eduction tubes are symmetrically mounted at the upper end of the upper connecting plate, and mounting rings are fixedly mounted at the upper ends of the eduction tubes. A filter plate is fixedly mounted in the mounting ring, a limiting gear ring is rotatably mounted outside the mounting ring, a cleaning scraper is clamped to the limiting gear ring, a movable cover is arranged on the upper connecting plate, a cleaning part capable of cleaning condensate beads and frost is arranged in the air conditioner body, and a transmission assembly is arranged between the cleaning part and the movable cover. The protective covers are arranged at the air openings in the two ends of the air conditioner, the possibility that dust, sundries and the like enter the fan is reduced, the surfaces of the evaporator and the condenser can be automatically cleaned when the protective covers at the protective air openings are closed and opened, the possibility of bead condensation and frosting in the air conditioner is reduced, and the service life of the air conditioner is prolonged.

The application discloses a data centralizing device and a data transmission system, and belongs to the field of data centralizing devices. The data centralizing device comprises a switch unit, a first wireless internet-of-things unit, a second wireless internet-of-things unit and a central control unit; the first wireless internet-of-things unit and the second wireless internet-of-things unit are electrically connected with the central control unit, the switch unit can be electrically connected with the central control unit, the first wireless internet-of-things unit executes a first protocol, the first wireless internet-of-things unit is connected with an internet-of-things terminal through the first protocol, the second wireless internet-of-things unit executes a second protocol, the second wireless internet-of-things unit is connected with a communication base station through the second protocol, a first end of the switch unit is used for accessing electric energy, and a second end of the switch unit is used for connecting an electric device; wherein the wireless connection range of the first wireless internet-of-things unit is smaller than the wireless connection range of the second wireless internet-of-things unit.

The application relates to the technical field of battery cell structures and specifically provides a single battery and a battery pack, which comprise a pole, a battery cell and a transition sheet. The battery cell leads out multiple tabs and gathers the tabs to form a tab group, the length of each tab is positively correlated with the distance from the position of the tab to the gathering position; the transition sheet is provided with a tab welding area, a pole welding area and a melting portion, the tab welding area is welded with the tab group, the pole welding area is welded with the pole, the distance between the melting portion and the pole welding area is L1, the distance between the melting portion and the tab welding area is L2, and 0.33<=L1 / L2<=4.5. In the application, the lengths of the tabs are different, so that the tabs are aligned as much as possible, and the tabs do not need to be cut. In addition, the ratio of the distance L1 between the melting portion and the pole welding area and the distance L2 between the melting portion and the tab welding area should be moderate, that is, L1 / L2 is moderate, the melting portion is prevented from being too close to the pole welding area or the tab welding area, and the melting portion is greatly affected by heat.

The invention discloses an earphone control method, an earphone, a system, an electronic device and a storage medium, and relates to the technical field of earphones. During execution of the method, when it is detected that a Bluetooth module is not in communication connection with a first external device and a wired connection module is electrically connected with a second external device, the first external device is in communication connection with the first external device; the analog change-over switch module is controlled to disconnect the loudspeaker module from the main control module, so that the leakage current of the main control module can be prevented from being transmitted to the loudspeaker module, and the loudspeaker module is prevented from generating noise due to the leakage current. And under the condition that the Bluetooth module is detected to be in communication connection with the first external equipment and the wired connection module is not electrically connected with the second external equipment, the analog change-over switch module is controlled to enable the loudspeaker module to be conducted with the main control module, so that the main control module receives the audio sent by the first external equipment through the Bluetooth module. When the loudspeaker module is connected with the external equipment in a wired connection mode to play audio, the risk of noise of the loudspeaker module is reduced.

The utility model relates to the technical field of medical experiment instruments, in particular to a continuous administration mouse stellate ganglion block catheter which comprises an implantation portion, the implantation portion comprises a catheter head and a catheter which are communicated with each other, and the catheter can be implanted into the neck of a mouse; the protective cap is in threaded connection with the top opening of the catheter head; a rubber seal is arranged in the middle of the protective cap; the built-in column is installed in the cavity of the catheter head, and a liquid control assembly is arranged in the built-in column and used for enabling the inner cavity of the catheter head to be communicated with or separated from the catheter. The catheter is implanted into the body of a mouse, then medicine injection can be completed in the mode that the rubber seal is punctured from the outside, follow-up continuous medicine administration is made possible, meanwhile, stellate ganglion block operation of the mouse is simpler, the catheter is communicated and separated through the liquid injection assembly, and the catheter is more convenient to use. And the guide pipe can be prevented from being directly communicated with the external environment when the protective cap is detached and replaced, so that the internal cleanness of the guide pipe is ensured to the greatest extent.

The invention belongs to the technical field of nuclear radiation protection, and discloses an isolation door for nuclear radiation protection, which comprises a shell mechanism, an opening and closing unit is arranged on the shell mechanism, and a disinfecting and killing unit is arranged in the opening and closing unit; the shell mechanism comprises a shell body, a driving groove and a channel, the driving groove is formed in the shell body, the channel is formed in the shell body and located on one side of the driving groove, and two groove openings are symmetrically formed in the shell body and located between the driving groove and the channel. Through orderly opening and closing of the closing doors, direct connection of the two independent spaces is avoided, and through alternate switching of the closing doors, effective leakage prevention of nuclear radiation is ensured, so that the radiation isolation effect is improved, and when pedestrians leave, the two independent spaces can be separated from each other. The four connecting sleeves which move cooperatively can drive the spraying plates connected with the connecting sleeves to conduct comprehensive disinfection treatment on the protective clothing of pedestrians. In the process, radioactive pollution sources on the clothes of the pedestrians can be effectively removed, the protection effect is greatly enhanced, and safety and health of the pedestrians are ensured.

The utility model provides a wire harness buckle, a vehicle metal plate connecting structure and a vehicle, and relates to the technical field of automobile parts. The wire harness buckle comprises a first clamping groove structure and clamping parts, the clamping parts are arranged on groove wall structures corresponding to the two ends of the first clamping groove structure in the width direction of a groove opening of the first clamping groove structure respectively, and the clamping parts are used for being connected with clamping matching parts of an interior trim part of a vehicle in a clamped mode. The end, away from the notch, of the wire harness buckle is used for being connected with a metal plate of the vehicle. The wire harness buckle not only can be used for installing the wire harness, but also can be used for connecting the interior trim part and the metal plate, can improve the disassembly and assembly convenience of the wire harness, is compact in structure, is higher in connection reliability between the interior trim part and the metal plate, can improve the space utilization rate between the interior trim part and the metal plate to a certain extent, and is convenient to use. And the miniaturization design of the space between the metal plate and the interior trim part is facilitated.

The present application relates to the technical fields of nitrogen recovery condensation of liquid nitrogen tank, in particular to a liquid level pressure linkage safety gas return and recondensation device of liquid nitrogen tank, which comprises a liquid nitrogen tank body, a pressure detection control valve body, a gas pressurization processing unit and a condensation backflow processing unit, the gas pressurization processing unit is installed on one side of the liquid nitrogen tank body, the upper end of the gas pressurization processing unit is connected with the pressure detection control valve body, the pressure detection control valve body fills the gas into the gas pressurization processing unit after detecting that the internal pressure of the liquid nitrogen tank body reaches a certain threshold value, and the condensation backflow processing unit is installed on the upper end of the liquid nitrogen tank body.The present application can fill the nitrogen gas in the liquid nitrogen tank body into the condensation backflow processing unit after pressurization processing by the gas pressurization processing unit, the condensation backflow processing unit condenses the pressurized nitrogen gas into liquid nitrogen, and the condensation backflow processing unit fills the condensed liquid nitrogen into the liquid nitrogen tank body again, so as to recycle the nitrogen gas and reduce the waste of the nitrogen gas.

The utility model provides a single-tube high-rise building structure which comprises a core tube, the bottom of the core tube is arranged on the top of a foundation, a peripheral frame located on the outer layer of the core tube is further arranged on the top of the foundation, the core tube and the peripheral frame are connected with the two ends of a floor slab in the horizontal position, and a heat preservation damp-proof layer connected with the core tube is arranged on the floor slab in the vertical direction. A conveying pipeline is arranged in the core tube in the vertical direction, the floors are communicated through a flow guide pipeline and the conveying pipeline, and an air outlet hole communicated with the top of the conveying pipeline is formed in the top of the core tube. Moist air in the transmission pipeline is discharged from the top of the building through the air outlet holes, the moist air discharging efficiency of the transmission pipeline is improved, and heat loss in a floor is reduced by arranging the heat preservation and moisture prevention layer.

According to the electric screwdriver with the pressure-torsion sensor, the electric screwdriver is provided with the shell, the rotating motor, the main shaft and other components, normal work of the electric screwdriver can be met, the first sensor body and the second sensor body are integrated, and therefore the electric screwdriver can detect radial torsion data and pressing data at the same time; the torque and the vertical acting force can be more accurately controlled in the operation process of the electric screwdriver, and therefore the assembling precision and controllability are improved. The first sensor body and the second sensor body are reasonable in design, respectively sleeve the outer ring of the main shaft and are connected with the shell. The structural design not only ensures the stability and durability of the sensor, but also avoids direct connection between the sensor and the main shaft or the rotating motor, and reduces the risk of damage to the sensor. Compared with a traditional electric screwdriver, the electric screwdriver with the pressure-torsion sensor is remarkably improved in function. Besides the basic rotating function, the torque and pressing data can be monitored and fed back in real time.

The utility model belongs to the technical field of hoisting, and discloses a hoisting point device and a hoisting tool, the hoisting point device comprises a hoisting point body, a hoisting hook and a limiting assembly, the hoisting point body is provided with a sliding groove, a limiting groove and a through hole, the hoisting hook is used for connecting a hoisting hole and the hoisting point body, and the limiting assembly comprises a limiting piece and a locking piece. The limiting piece is slidably inserted into the sliding groove and can penetrate through the through hole to stretch out of the lifting point body, the part, stretching out of the lifting point body, of the limiting piece abuts against the lifting hook so as to limit and fix the lifting hook in the lifting hole, and the locking piece is rotatably arranged on the limiting piece and can be screwed into the limiting groove. When the lifting hook is connected with the lifting hole, the limiting piece extends out of the lifting point body to abut against the lifting hook, the space between the lifting hole and the lifting hook is filled, and then the locking piece is screwed into the limiting groove, so that the lifting point device is limited and fixed in the lifting hole, and the stability during lifting is improved.

The invention relates to an air floatation bearing system. An air-floating bearing system comprises an air-floating assembly, a bearing assembly, an air-floating assembly and a bearing assembly, the air-floating assembly is provided with a positive-pressure air hole, and the positive-pressure air hole is used for blowing air to achieve suspension of a borne part; the positive pressure pipeline is communicated with the positive pressure air hole, and the positive pressure pipeline comprises a positive pressure valve; the negative pressure pipeline is communicated with the positive pressure air hole, and the negative pressure pipeline comprises a negative pressure valve; the switching pipeline is provided with a first end connected with the positive pressure pipeline and a second end connected with the negative pressure pipeline, the connecting point of the first end and the positive pressure pipeline is located on the side, close to the air flotation assembly, of the positive pressure valve, and the connecting point of the second end and the negative pressure pipeline is located on the side, away from the air flotation assembly, of the negative pressure valve; the switching pipeline comprises a switching valve used for controlling connection and disconnection between the positive pressure pipeline and the negative pressure pipeline. The positive pressure and the negative pressure of the positive-pressure air hole can be switched through the branch pipeline. The invention mainly solves the technical problem that the positive pressure air hole of the air floatation bearing system is blocked in the using process.

The utility model relates to the technical field of toughened glass, and discloses high-temperature-resistant high-strength toughened glass which comprises a glass body, buffer assemblies are clamped at four corners of the outer surface of the glass body, the outer surfaces of the buffer assemblies are fixedly connected with a mounting frame, and threaded holes are formed in the top and the bottom of the surface of the mounting frame; by arranging the buffering assembly, when the surface temperature of the glass body is too high, the glass body can expand, the glass body and the telescopic spring can be connected through the arranged base plate, the telescopic spring is prevented from being directly connected to the surface of the glass body, when the glass body is heated to expand, buffering can be conducted through the telescopic spring, and the service life of the glass body is prolonged. A buffer distance is reserved for the glass body by the telescopic spring, the problem that the glass body is damaged due to the fact that the glass body extrudes the frame after expanding is avoided, and the glass body is matched with the silicate coating and the heat insulation layer on the two sides of the surface, so that the high-temperature insulation performance of the glass can be improved.

The invention discloses a virtual management network construction method and system in a network target range. The method comprises the following steps: creating an external management network switch and an external core router; creating an internal service network switch of the topology instance; internal management network switches of the topology instance are created, each internal service network switch corresponds to one internal management network switch, and each internal management network switch corresponds to one virtual configuration acquisition agent node and one flow generator; creating an internal core router according to the number of nodes accessed by the internal management network switch; a port where the internal core router and the external core router are connected starts the SNAT, and the internal management network switch sets an ACL rule. According to the invention, the signaling flow is completely separated from the direct service flow network route of the service node in the target range topology instance, the receiving and responding efficiency of the signaling flow is improved, and the load balancing is realized.

The application discloses a power supply circuit and an energy storage system, and relates to the technical field of power supply switching. The power supply circuit is connected with a load, and comprises a multi-path alternating current power supply and a first relay. The multi-path alternating current power supply comprises a first alternating current power supply and a second alternating current power supply. The power supply priority of the first alternating current power supply is higher than that of the second alternating current power supply. The first relay comprises a first coil, a first switch and a second switch. The input end of the first coil is connected with the firewire end of the first alternating current power supply. The output end of the first coil is connected with the zero line end of the first alternating current power supply. The first switch is connected with the firewire end of the load, and the second switch is connected with the zero line end of the load. The closing state of the first switch and the second switch is controlled based on the energization state of the first coil, so that the switching of the first alternating current power supply and the second alternating current power supply is realized. By setting alternating current power supply branches with different priorities and automatically switching to the highest priority available power supply by using the relay, the power supply stability is improved.

The utility model relates to an electronic atomization device. The electronic atomization device comprises a shell, a convex part and a power supply assembly. The shell is provided with a containing cavity, and an air inlet hole is formed in the shell; the convex part is arranged in the containing cavity and located at the air inlet hole, the convex part is provided with a top surface and a side surface, the top surface is right opposite to the air inlet hole, the side surface is provided with an air vent hole, and the air vent hole is communicated with the containing cavity and the air inlet hole; the power supply assembly is arranged in the containing cavity and abuts against the top face or is arranged at an interval with the top face. In this way, it can be avoided that the air inlet hole is directly connected with the containing cavity in the extending direction of the air inlet hole, the internal structure can be prevented from being directly seen from the outside of the electronic atomization device through the air inlet hole through the protruding part, and the risk that a battery assembly in the containing cavity is punctured by external foreign matter can also be prevented; the air inlet hole can be prevented from being shielded by the battery assembly in the accommodating cavity, so that the air flow of the air inlet hole is more stable.

The utility model discloses a detachable module type water heating assembly which comprises an upper flow collecting groove, a lower flow collecting groove and a flat pipe module assembly. Convex collecting pipes are arranged on the sides, close to the flat pipe module assembly, of the upper collecting groove and the lower collecting groove, the flat pipe module assembly is composed of an upper flat pipe collecting groove, a lower flat pipe collecting groove and a flat pipe set, the flat pipe set is arranged between the upper flat pipe collecting groove and the lower flat pipe collecting groove, and convex flat pipe collecting pipes are arranged on the outer sides of the upper flat pipe collecting groove and the lower flat pipe collecting groove; a communicating pipeline is arranged between the convex flat pipe collecting pipes and the convex collecting pipes; horizontal limiting plates are arranged on the upper side of the upper flat pipe collecting groove and the lower side of the lower flat pipe collecting groove, and side plates are arranged on the left sides and the right sides of the upper collecting groove, the lower collecting groove, the upper flat pipe collecting groove and the lower flat pipe collecting groove. According to the utility model, the structure is novel, the warm water total layer is divided into a plurality of groups of small-specification flat pipe modules, the later maintenance and replacement are convenient, the use cost is reduced, the small-specification flat pipe total layer is convenient to clean, and the internal cleaning cleanliness is improved.

The utility model discloses a ceramic coating die head and coating equipment. The ceramic coating die head comprises a first die head, a second die head and a fastening assembly, wherein the first die head and the second die head are matched with each other; the first die head and the second die head are both made of ceramic materials, a first connecting hole is formed in the first die head, a second connecting hole is formed in the second die head from top to bottom, a containing groove is formed in the second die head from bottom to top, and the first connecting hole, the second connecting hole and the containing groove are located on the same axis. The fastener penetrates through the first connecting hole and the second connecting hole, and one end of the fastener extends into the containing groove to be connected with the locking piece so as to be suitable for fixing the first die head and the second die head. According to the ceramic coating die head, through matched connection of the fastening piece and the locking piece, direct connection between the fastening piece and the second die head is avoided, so that concentrated stress of the fastening piece on the second die head is reduced, the connection strength of the structure is improved, the connection reliability of the first die head and the second die head is guaranteed, and the coating uniformity is improved.

The invention provides a vehicle gutter channel assembly and an assembling method. The vehicle gutter channel assembly comprises a front windshield glass mounting plate, a rear windshield glass mounting plate and a gutter channel, an opening is formed in the top of the gutter channel, the bottom edge of the windscreen wiper protection plate is connected to the rear wall of the gutter channel in a sealed mode and extends in the direction close to the front edge of the gutter channel so as to shield a partial area of the opening of the gutter channel, and the windscreen wiper protection plate is connected with the front edge of the front windscreen installation plate in a sealed mode; the windscreen wiper mechanism is arranged in the gutter channel, and a rocker arm of the windscreen wiper mechanism extends out of the area, not shielded by the windscreen wiper protection plate, in the opening of the gutter channel; the first end plate and the second end plate are used for being installed on the two front wheel cover sealing plates correspondingly, and the two ends, in the width direction of the vehicle body, of the water flowing groove are connected with the first end plate and the second end plate correspondingly. The assembling method is used for assembling the vehicle gutter channel assembly. The installation difficulty of the gutter channel and the windscreen wiper mechanism is reduced, and the freedom degree of the size and the shape of the front windshield glass installation plate in the length direction of the automobile body is improved.

The utility model provides a rolling driving device of a boarding machine, which comprises a base, a motor, a cardan shaft assembly and a transmission assembly, the motor and the cardan shaft assembly are both arranged on the base, the transmission assembly is arranged between the motor and the cardan shaft assembly, the transmission assembly comprises a driving tooth, a first chain and a transmission tooth group, a motor shaft of the motor is connected with the driving gear, the universal shaft assembly is connected with the transmission gear set, the driving gear is connected with the transmission gear set through the first chain, and the motor drives the universal shaft assembly through the transmission assembly. The gravity center of the device is lowered, and the whole device is more stable.

The utility model relates to the technical field of medical apparatus and instruments, and discloses a conductive structure and a laparoscopic surgical instrument, the conductive structure comprises a handle shell, the inner side peripheral wall of the handle shell is enclosed to form a mounting cavity, and a lead is arranged in the mounting cavity; the rotating shaft body is rotationally arranged in the mounting cavity; the elastic piece is made of an elastic conductive material, the elastic piece is arranged between the outer side peripheral wall of the rotating shaft body and the inner side peripheral wall of the handle shell, the elastic piece and the handle shell are relatively fixed, the elastic piece is electrically connected with the wire, and the elastic piece and the rotating shaft body are always kept in elastic abutting connection. According to the conductive structure provided by the utility model, the elastic sheet can be electrically connected with the rotating shaft body all the time in the circumferential rotation process of the rotating shaft body, thereby avoiding direct connection between the lead and the rotating shaft body, and further avoiding torsion damage of the lead.

The utility model provides a vacuum filtration system with a pressure relief device. The vacuum filtration system comprises a vacuum pump, a connecting hose, a conducting device, a filtering device, a liquid container and the pressure relief device, the vacuum pump is connected with the filtering device through a connecting hose and a conducting device; the conducting device is respectively connected with the vacuum pump, the filtering device and the pressure relief device through connecting hoses; and the liquid container is hermetically connected with the filtering device. According to the vacuum filtration system with the pressure relief device, provided by the utility model, the vacuum pump and the filter device are communicated by utilizing the conducting device with a three-way structure, so that direct connection of a connecting hose is avoided, and direct pressure relief can be carried out only by controlling a control valve on the pressure relief device when pressure relief is needed; the working pressure of the vacuum pump can be detected in real time while the pressure relief efficiency is improved, the possibility of pressure leakage is reduced, and economic benefits are improved.

The utility model discloses a leakage-proof chip removal machine which comprises a chip removal machine shell, a groove is formed in the upper surface of the chip removal machine shell, the leakage-proof chip removal machine further comprises a material groove, the material groove is formed in the upper surface of the chip removal machine shell, and a transmission structure is arranged on the side surface of the chip removal machine shell. And the transmission structure can enable the screw rod to control rotation through the chain, the transmission structure comprises the screw rod, the screw rod is rotationally installed in the trough, one end of the screw rod rotationally penetrates through the side surface of the shell of the chip removal machine, and the screw rod is connected with the side surface of the shell through a flange plate. According to the chip removal machine convenient to prevent liquid leakage, the transmission structure is arranged, the screw rod can be controlled to rotate through the chain, direct connection with the motor is avoided, the replacement structure is further arranged, the shrinkage block can loosen the main shaft through the lantern ring, the screw rod can be rapidly replaced conveniently, and the overall practicability is improved.

The utility model discloses a fuel tank integrated with boarding steps, belongs to the technical field of fuel tanks, and solves the problem that the fuel tank is easy to crack and lose efficacy due to an existing boarding step integration mode. And a plurality of fastening belts are fixed on the oil tank body at intervals. A mounting hole is formed in the side wall of the oil tank body. One end of the stepping structure is fixed on the side wall of the fuel tank body, and the other end penetrates through the mounting hole and is embedded into the fuel tank body. The mounting structures are fixed to the two adjacent fastening belts, and the mounting structures are located on the top of the oil tank body. The stepping platform is fixed to the mounting structure and located above the stepping structure. The stepping structure is fixed in the oil tank body in an embedded mode, so that the connecting strength between the oil tank body and the stepping structure is improved, and cracking of the oil tank body is avoided. Besides, the stepping platform is fixed on the fastening belt through the mounting structure, so that the stepping platform is prevented from being directly connected with the oil tank body, the oil tank body is prevented from cracking, and the reliability of the oil tank body is improved.

The invention discloses a guide rail combination device capable of being quickly mounted and dismounted, a method and a display device. The guide rail combination device comprises multiple stages of guide rails, a bracket and support lugs, guide rail positioning holes are formed in two ends of the support lugs; the support lugs are respectively fixed on the left and right sides of the bracket; positioning nails are arranged at two ends of the innermost guide rail of the multi-stage guide rail, and are vertical to the mounting plane of the multi-stage guide rail to protrude; and the bracket is mounted on the positioning nails through the guide rail positioning holes in the support lugs, and is pulled along with the stretching of the multi-stage guide rails. The guide rail positioning holes comprise the positioning hole I and the positioning hole II, during installation, the bracket is lifted to be kept in an inclined state, the positioning nails on the inner side of the multi-stage guide rail enter the positioning hole I and slide in place along the outline of the positioning hole I, meanwhile, the bracket is laid flat, and the positioning nails on the outer side of the multi-stage guide rail are limited in the positioning hole II; the multi-stage guide rail is pushed inwards in place after being unlocked. The multi-stage guide rail can be quickly mounted and dismounted.

The utility model discloses a longitudinal retractable curtain with difficult-to-deform edges, which belongs to the technical field of curtains, comprises a curtain body, and is characterized in that chain belts are symmetrically arranged on two sides of the curtain body, cloth belts are arranged at the front parts of the chain belts, and first connecting belts are arranged at the rear parts of the cloth belts and correspond to the curtain body; a second connecting belt is arranged at the position, corresponding to the chain belt, of the rear portion of the cloth belt, the cloth belt is fixedly connected with the curtain body through the first connecting belt, and the cloth belt is fixedly connected with the chain belt through the second connecting belt. According to the utility model, the situation that the welding positions on the two sides of the longitudinal retractable curtain are too thick and thus the curtain is wrinkled in the use process is effectively avoided.