37results about How to "Limited rotation" patented technology

The utility model relates to lighting lamp technical field, concretely is a kind of wall washer with dual function, including luminaire body, connecting column and connecting assembly, the quantity of connecting assembly is at least two, two connecting assemblies are slidably installed in the top of luminaire body, the top of connecting assembly is equipped with the connecting rod for connecting assembly and luminaire body fixed connection in use state and make the installation of luminaire body, connecting column is set in the top side of connecting rod, the outside of connecting column is equipped with the mounting plate for supporting and rotating limiting of connecting column to connecting column. The utility model is tightened in the top of connecting assembly by connecting rod, connecting assembly is clamped and fixed on luminaire body, and connecting column and mounting plate are connected by driving connecting column by luminaire body, and it is supported and limited to connecting column, simultaneously, by the cooperation of clamping groove and protruding block, effectively limit connecting column to rotate in gourd hole, to avoid the situation that connecting column rotates after luminaire body is installed.

The utility model discloses a pneumothorax first-aid device which comprises a box body with a built-in power supply, a breathing machine arranged in the box body, an oxygen bottle communicated with the breathing machine and a respirator which is communicated with the oxygen bottle and can extend out of the box body. A box cover with the outer side wall being an inclined face is hinged to the position, corresponding to the breathing machine, of the box body, and the non-hinged end of the box cover is detachably connected with the box body. One side of the box body is movably provided with a positioning plate for directional puncture of the gas needle, the other side of the box body is movably provided with a gas guide cylinder, and the gas needle is embedded and fixed on the positioning plate and is communicated with the gas guide cylinder. The box body internally provided with the breathing machine, the oxygen bottle and the respirator is arranged, the box body is connected with the box cover provided with the inclined face, the posture of a patient can be conveniently adjusted in good time, and the positioning plate is movably arranged so that the acupuncture position can be conveniently adjusted, positioned and guided; and the gas guide cylinder movably arranged along with the box body is convenient to carry and is also suitable for being placed during use, the structure is simple and compact, and the use is convenient.

The utility model discloses a stirring device of a dispersion machine, and belongs to the technical field of stirring devices. The stirring device of the dispersion machine comprises a fixing plate, a transverse plate is installed at the bottom end of one end face of the fixing plate, the bottom end of the transverse plate is rotationally connected with a stirring shaft, a dispersion head is installed at the bottom end of the stirring shaft, a motor is installed at the top end of the transverse plate, the output end of the motor is connected with the top end of the stirring shaft, and the outer side of the stirring shaft is sleeved with a cover plate. A folding limiting mechanism is arranged at the top end of the cover plate, a pressing mechanism for pressurizing the cover plate sleeves the outer side of the stirring shaft, the folding limiting mechanism comprises a folding frame, a first hinge is mounted at the bottom end of the folding frame, one end of the first hinge is fixedly connected with the top end of the cover plate, and a second hinge is mounted at the top end of the folding frame; according to the cover plate, the pressurizing function of the cover plate can be effectively achieved, the protection performance on liquid splashing is improved, and the practical value is high.

The utility model provides a kind of guiding stabilizing device and air rail shunting machine bogie, guiding stabilizing device includes mounting seat plate, stabilizing wheel and guide wheel, stabilizing wheel is rotatably mounted in the top two sides of the mounting seat plate by axle assembly;Guide wheel is rotatably mounted in the bottom two sides of the mounting seat plate by axle assembly;Wherein, the axle assembly includes axle, limit piece and limit slot, the limit slot is opened in the end outer side of the axle, the limit piece is detachably mounted on the mounting seat plate, and is inserted in the limit slot inner side.The utility model is by mounting seat plate, stabilizing wheel and guide wheel to constitute basic guiding stabilizing structure, and by axle, limit piece and limit slot, change traditional locking nut connection mode, by the mechanical interlocking structure of limit piece and limit slot insertion, not only limit axial migration, but also limit around its axial rotation, not only conveniently install axle to mounting seat plate, and structure is more stable.

The utility model relates to the technical field of data lines, in particular to an all-in-one data line with an independent winding structure, which comprises a shell, a winding mechanism arranged on the front side of the shell, the winding mechanism comprises a rotating cylinder, the top and the bottom of the rotating cylinder are symmetrically provided with limiting sliding grooves, the inner wall of the rotating cylinder is slidably connected with a sliding block, and a handle is arranged on the front side of the sliding block. Connecting rods are symmetrically and fixedly connected to the positions, close to the upper and lower sides, of the rear side surface of the handle through bolts, the rear ends of the connecting rods penetrate through the front end of the rotating cylinder and are connected with the front side surface of a sliding block, and a spring is fixedly connected to the front side surface of the sliding block. According to the all-in-one data line with the independent winding structure, by arranging the winding roller, the rotating cylinder, the connecting block, the sliding block, the handle, the connecting rod and the spring, the device can conveniently drive the winding roller to rotate, so that the data line is conveniently wound, by arranging the mounting plate and the inserting rod, the device can conveniently limit rotation of the rotating cylinder, and the data line can be conveniently wound. Therefore, the length of the part, extending out of the shell, of the data line is limited.

The utility model discloses a crane hook group pulley mounting structure which comprises a bearing wheel, the bearing wheel is connected to a steel wire rope, a connecting mechanism is arranged on the bearing wheel, and the connecting mechanism comprises a center rod, a bearing sleeve, an inserting pipe, a hexagonal sleeve, a limiting ring, an elastic piece, an abutting head, a limiting mechanism and a bearing mechanism. The center rod is slidably connected with a bearing sleeve, the bearing sleeve is attached to the interior of the bearing wheel, the two ends of the center rod are each provided with an insertion pipe, and the connecting mechanism achieves quick connection and fixation of the hexagonal sleeve and the insertion pipes through cooperation of the center rod, the bearing sleeve, the insertion pipes, the hexagonal sleeve, a limiting ring, an elastic piece and a contact head. According to the design, the elastic piece and the contact head are arranged in a one-way mode, the tedious process of rotating along the spiral groove is avoided, and the installation efficiency and convenience are greatly improved.

The utility model discloses a state monitoring assembly for a wire harness, and relates to the technical field of wire harness monitoring equipment, the state monitoring assembly comprises a monitor main body and a data line, the data line is provided with a protective sleeve, the data line comprises a joint and a lead, the protective sleeve comprises an inner-layer soft sleeve, a top fixing lantern ring and a bottom fixing lantern ring, the inner-layer soft sleeve is detachably installed on the joint, and the top fixing lantern ring is detachably installed on the lead. The inner-layer soft sleeve comprises a top plate, a base and a connecting column, the top fixing lantern ring is movably installed at the top of the inner-layer soft sleeve, the bottom fixing lantern ring is movably installed at the bottom of the inner-layer soft sleeve, a fan-shaped notch matched with a wire is formed in the side face of the protective sleeve, and the protective sleeve is arranged on the wire in a sleeving mode through the fan-shaped notch. The data line connector has the advantages of being convenient to assemble and disassemble, enhancing the protection performance and prolonging the service life, and solves the problems that a traditional data line connector is easy to damage and high in maintenance cost.

This application discloses a power adapter cable outlet structure, relating to the field of power adapters. The adapter includes an adapter with a winding mechanism inside its cavity and a locking mechanism on one side. The winding mechanism includes a fixed rod fixedly installed inside the adapter, and a winding roller is provided on the outer surface of the fixed rod. This invention, through the action of the winding mechanism, can wind up the cable harness, facilitating the carrying of the adapter. Pulling the connector outward causes the cable harness to be released from the winding roller. After being pulled to the desired length, it is ready for use. During further pulling, the winding roller drives a circular plate to rotate outside the fixed rod, causing a torsion spring to twist. After use, because the torsion spring has been twisted and needs to return to its original position, the torsion spring drives the circular plate to rotate in the opposite direction, which in turn drives the winding roller to rotate, thereby winding up the cable harness. This design facilitates quick pulling out and winding of the cable harness.

The utility model provides a kind of food production sampling device, belong to food sampling equipment technical field, including the wall breaking head of sampling cylinder front end setting, sampling cylinder is provided with multiple first sampling port along its axial direction, sampling tube is rotatably provided in sampling cylinder, sampling tube is provided with multiple second sampling port along its axial direction, one stop sheet is arranged between two second sampling ports, stop sheet and sampling tube inner wall are slidably arranged, the end of sampling tube away from wall breaking head is provided with rotating part, the utility model separates by rotating torsion ring and makes external thread head and sampling tube, at this time, the rice material of lower depth can be taken out, and at the same time, the external thread head after disassembly is blocked at the second sampling port away from wall breaking head end, by pushing push rod, multiple stop sheets are synchronously moved, so as to push out the rice material of middle depth, finally, the rice material of upper depth is taken out, so that the food of upper, middle and lower layers can be accurately sampled and detected, so as to improve the accuracy of food sampling device sampling.

The invention belongs to the technical field of agricultural machinery part machining, and particularly relates to a guide wheel rim and radial plate machining process, a guide wheel machining process and a forging die. The rim and the spoke plate are subjected to the die forging machining technology, the finished rim tightly wraps and wraps the peripheral plate edge of the spoke plate, on one hand, reliable connection of the rim and the spoke plate can be achieved without welding, mutual separation of the rim and the spoke plate is effectively avoided, on the other hand, the rim and the spoke plate have the large contact area, and rotation of the rim relative to the spoke plate can be limited; therefore, the stability of connection between the guide wheel spoke plate and the rim is ensured. In the machining process, the rim is formed in the forming cavity defined by the upper forging die and the lower forging die, after machining of the rim and the radial plate is completed, production and machining of the guide wheel can be completed by welding and connecting the hub and the radial plate, materials of the rim are saved, and meanwhile the production efficiency is remarkably improved.

The utility model provides a high-voltage connector, which belongs to the technical field of electrical component connection and comprises a shell, a shielding assembly, an anti-rotation piece and an axial anti-channeling structure. The shielding assembly is arranged in the shell; the shielding assembly is used for crimping a cable; the anti-rotation piece is located in the shell and sleeves the periphery of the shielding assembly; the anti-rotation piece and the shielding assembly are matched in the circumferential direction, and a circumferential limiting structure is arranged between the anti-rotation piece and the shell. The axial anti-channeling structure is arranged between the outer wall of the shielding assembly and the inner wall of the shell, is connected with the shell and the shielding assembly in the axial direction and is used for limiting axial movement of the shielding assembly. According to the utility model, the anti-rotation member can cooperate with the shielding assembly, and the circumferential limiting structure is used to limit the rotation of the anti-rotation member and the shielding assembly, thereby preventing the cable from rotating; the axial anti-displacement structure is used for axially connecting the shielding assembly and the housing, preventing relative displacement between the shielding assembly and the housing, and further avoiding displacement of the cable.

The invention provides a method for improving the fluorescence intensity of a two-dimensional polymer with excitation wavelength dependence, which comprises the following steps: (1) adding the two-dimensional polymer with excitation wavelength dependence into an organic solvent, stirring to obtain a uniform and transparent solution, adding fluorescent molecules and a catalyst into the uniform and transparent solution, and stirring to obtain a transparent solution; carrying out esterification or amidation reaction on the two-dimensional polymer with excitation wavelength dependence and fluorescent molecules; and (2) after the reaction is finished, precipitating, dialyzing, filtering and drying to obtain the product. Traditional fluorescent molecules are introduced into the two-dimensional polymer with excitation wavelength dependence to change the molecular aggregation state of the two-dimensional polymer and limit intramolecular rotation or intramolecular vibration, so that non-radiation attenuation is reduced, fluorescence of the two-dimensional polymer with excitation wavelength dependence is remarkably enhanced, and the fluorescence intensity of the two-dimensional polymer with excitation wavelength dependence is improved. According to the present invention, the excitation wavelength dependence is maintained in the relatively wide excitation wavelength range, the original blue and green are enhanced, the red fluorescence can be obtained through adjustment, and the red fluorescence intensity is correspondingly enhanced;

The utility model relates to the technical field of sound wave transducers, in particular to a sound wave transducer with a support, which comprises an upper shell and a lower shell which are covered up and down, a storage cavity is formed between the upper shell and the lower shell in a matching manner, T iron is arranged in the storage cavity, magnetic steel, an elastic sheet and a magnetic conductive sheet are sleeved on the periphery of the T iron, and the magnetic steel is arranged in the storage cavity. A support is arranged on the periphery of the lower shell, and a hook plate is connected between the periphery of the lower shell and the support. The lower shell and the support are integrated, so that the storage cost is reduced, the assembly process is simplified, the sound wave transducer is used for being fixed to a sofa or a bed board, vibration is conducted to the sofa or a mattress and then conducted to the human body, and after the lower shell and the support are integrated, the vibration transmission effect is better, and the actual requirement is better met.

A material taking machine wheel bucket fixing device not prone to falling off belongs to the technical field of material taking machine equipment and is used for firmly fixing a wheel bucket on a bucket wheel body and preventing the wheel bucket from being damaged due to falling off of a pin shaft. According to the technical scheme, an annular fixing groove is formed in the front end of a fixing pin shaft, the inner edge of the fixing groove is flush with the plane of the outer wall of a bucket wheel body, clamping plates are rectangular plates, semicircular holes are formed in one sides of the two clamping plates respectively, the sides, provided with the semicircular holes, of the two clamping plates are opposite to form a square plane, and the two semicircular holes form a round hole. The semicircular holes of the two clamping plates are oppositely clamped in the fixing grooves in the front ends of the fixing pin shafts, a plurality of clamping plate fixing holes are formed in the plate faces of the two clamping plates respectively, and the clamping plates and the bucket wheel body are fixedly connected through a plurality of clamping plate bolts through the clamping plate fixing holes. The wheel bucket fixing device is firm and reliable in structure and convenient and safe to use, an original fixing mode is changed, damage to the wheel bucket caused by falling of the fixing pin shaft can be effectively reduced, the service life of the wheel bucket is prolonged, and the maintenance workload and cost are reduced.

The utility model relates to a window curtain technical field discloses a kind of double curtain cloth linkage limiting structure and window curtain, including upper beam track, middle rail, lower rail and the first pull cord assembly being set on upper beam track, first curtain cloth is set between middle rail and lower rail, second curtain cloth is set between upper beam track and middle rail, first screw rod and second screw rod are set on upper beam track, first limiting nut is threadedly connected on first screw rod, the one end of first screw rod is provided with first limiting block, second limiting nut is threadedly connected on second screw rod.The utility model is positioned to first screw rod and second screw rod by first limiting nut, second limiting nut respectively, so that middle rail and lower rail are positioned in respective lower limit position, avoid the problem that curtain rope reverse winding is caused due to excessive operation in curtain cloth lowering process;First screw rod and second screw rod can be linked simultaneously, avoid second curtain cloth to lower excessively and interfere with first curtain cloth, and use experience is good.

The utility model discloses a motor rotor winding state detection device which comprises a device frame, a detection needle, a controller, an adjusting plate, a hydraulic rod, a clamping plate A, a clamping plate B, a conveying device, a fixing ring, a mounting plate and a ball nut. A clamping plate A and a clamping plate B are mounted on the adjusting plate, a mounting plate is mounted at the power shaft end of the motor B, a fixing ring is mounted on the mounting plate, a lifter is mounted on the device frame, a detection needle is mounted at one end of the lifter, a bottom plate is mounted on the conveying device, and a rotor placement clamping plate is mounted on the bottom plate. The phenomenon that the detection accuracy of the rotor is affected by slipping due to belt transmission is avoided, meanwhile, the problem that the rotor is easily abraded due to friction between the belt and the outer wall of the rotor is also avoided, the detection device is high in automation degree and meets the requirements of current automatic production, and the detection efficiency of the rotor is improved.

The application discloses a kind of based on high-speed camera's automobile safety air bag gas generator gas production and gas production rate test method, set up a vertical hollow transparent cylindrical rigid container in normal pressure environment, a light piston is arranged in rigid container and contacted with air bag gas generator;The vertical movement track of piston in rigid container is recorded by high-speed camera during the ignition intense combustion process of air bag gas generator, is simplified into physical model, is converted into the linear motion process of piston and the volume change formed by rigid container, i.e.gas production of gas generator;Solving the volume change rate is gas production rate.The present application has reliable theoretical basis, convenient operation, and accurate measurement result provides certain technical support for actual research and production.

The present invention belongs to the field of metallurgical technology, and specifically, relates to a device for disassembling a middle sleeve of a blast furnace by hydraulic power assistance, comprising a main beam, a pull rod, a reaction beam, a power assistance device and a fastening device; the main beam cooperates with a large sleeve of a blast furnace air supply system to provide an installation position; the power assistance device is connected to the main beam and contacts the reaction beam; the pull rod slidably cooperates with the main beam and the reaction beam, one end of the pull rod is provided with a towing hook for hooking the outer edge of the sleeve end of the blast furnace air supply system, and the other end is interspersed with the main beam and the reaction beam, and is connected to the fastening device. The present invention transmits mechanical action to the pull rod through the reaction beam to realize the disassembly of the middle sleeve, has a simple structure, low manufacturing cost, and is easy to use and store; using the power assistance device as a power source can effectively save manpower and working time, improve working efficiency, and effectively reduce the labor intensity of workers, and has the characteristics of good applicability, safety and reliability.

The utility model relates to the technical field of drill rod joints, in particular to a drill rod joint assembly. According to the technical scheme, the drill rod connector comprises a drill rod connector body, an inserting column is arranged on the upper surface of the drill rod connector body, the outer surface of the inserting column is sleeved with a first connecting sleeve, external threads are arranged on the outer surface of the first connecting sleeve, fixing holes are symmetrically formed in the two sides of the outer surface of the first connecting sleeve, and a through hole is formed in the outer surface of the inserting column; a through hole is formed in the lower surface of the drill rod connector body, a spring is arranged in the through hole, the two ends of the spring are connected with inserting rods correspondingly, a second connecting sleeve is installed at the position, close to the lower surface, in the drill rod connector body, internal threads are arranged on the inner wall of the second connecting sleeve, and fixing grooves are symmetrically formed in the two sides of the outer surface of the second connecting sleeve. After the connecting thread on the drill rod joint is abraded, the whole drill rod joint does not need to be replaced, and only the connecting sleeve of the thread abrasion part needs to be replaced, so that the replacement cost of the drill rod joint is reduced, and the material cost is also saved.

This utility model relates to the field of slag-sealing tank technology, specifically to a slag-sealing tank with a tank lid positioning device. When the mating tooth block and the locking tooth groove are engaged, there is a mating gap L on the same side of the mating tooth block and the locking tooth groove in the circumferential direction. The positioning device is located between the tank body and the tilting arm and is connected to the tilting arm. The positioning device includes two baffles parallel to the output direction of the vertical lifting mechanism. When the tank lid is closed, the bottoms of both baffles are in contact with the top of the tank body, and the opposite sides of the two baffles are located between the two sides of the same locking tooth groove. The distance H between the side of each baffle facing the other baffle and the side of the locking tooth groove in the same direction is less than L. In this utility model, the two baffles of the positioning device can restrict the movement of one mating tooth block on the tank lid in the circumferential direction when the tank lid rises and falls, thereby restricting the rotation of the tank lid and ensuring that the mating tooth block on the tank lid is correctly aligned with the locking tooth groove.

The box body accessory comprises a box body, a bearing piece and a clamping piece which can be matched with the bearing piece to connect the box body accessory to the side wall of the inflatable castle, the bearing piece is provided with an installation groove used for installing the box body, and the groove wall of the installation groove is provided with a clamping groove in the circumferential direction. A first avoiding opening is formed in the upper side wall of the clamping groove, a clamping block capable of penetrating through the first avoiding opening and being inserted into the clamping groove after the box body is rotated is arranged on the outer wall of the box body in the circumferential direction, an elastic structure capable of pressing the box body towards the outside of the hole is further arranged in the mounting groove, and the bearing piece and the clamping piece are connected to the side wall of the inflatable castle in a matched mode. Compared with sticking and binding, the connection of the structure is not easy to loosen and fall off, the clamping block is aligned with the first avoiding opening to be inserted so that the box body is inserted into the mounting groove, then the box body is rotated so that the clamping block can be inserted into the clamping groove to complete clamping of the box body, disassembly and assembly are very convenient and rapid, and the mounting groove is further internally provided with an elastic structure capable of jacking the box body towards the outside of the hole. Therefore, the box body is not easy to rotate, and the box body is prevented from being separated from the mounting groove.

The utility model discloses a protection device for placing a plurality of standard platinum resistance thermometers. The protection device comprises a base; a supporting column is vertically fixed to the base, the top end of the supporting column is connected with a rotary containing disc through a bearing, and a plurality of containing pipes are evenly distributed on the disc face of the containing disc in the circumferential direction in a penetrating and clamping mode. The top of each placing pipe is connected with a positioning and clamping mechanism, the supporting column is connected with a limiting mechanism, and wire containing grooves corresponding to the placing pipes one to one are vertically fixed to the outer edge of the placing disc. The utility model has the advantages that when the resistance thermometer is placed, the temperature measuring part of the resistance thermometer penetrates through the inner hole of the limiting plate and is placed in the placing pipe, the bottom end of the handle part of the resistance thermometer is propped against the top surface of the limiting plate, and the handle part of the resistance thermometer is clamped by the clamp, so that the structure is simple, and the temperature measuring effect is good during operation. The resistance thermometer is effectively protected through the containing pipe, the resistance thermometer is effectively limited through the positioning and clamping mechanism, and damage is avoided.

The utility model discloses a two -way hydraulic lock of high stability, including valve body and the screw plug of screwing in the two side walls of valve body, the sidewall of valve body is provided with anti -loose mechanism to each screw plug's correspondence, the anti -loose mechanism includes an anti -loose ring of being movably established in valve body, and the inner diameter wall of anti -loose ring is evenly provided with a plurality of inward bulging's clamping block along the circumference, the head outer diameter wall of screw plug is correspondingly set up and is provided with the clamping groove of the clamping block of carding into, still be equipped with the locking assembly of being used for locking anti -loose ring in the mutual clamping position of clamping block and clamping groove of valve body. The utility model has improved two -way hydraulic lock's sealing reliability and locking function stability under the long -term severe vibration working condition, effectively prevent hydraulic oil leakage and function failure, have guaranteed equipment operation safety, with compact structure, anti -loose effect reliable, the advantage that practicality is strong.

The invention relates to the technical field of bolts, provides a tool angle bolt and a preparation process thereof, and solves the problem of time-consuming installation caused by design defects of an existing tool angle bolt. The tool angle bolt comprises a bolt body, a reducing section is arranged at the other end of the bolt body, and a plurality of protrusions and a plurality of grooves are annularly arranged on the outer side of the reducing section at intervals; the adjacent protrusions are connected through the grooves, and one end of each groove is concaved inwards to form a clamping part. A U-shaped groove is formed in one end of the nut; the limiting piece is arranged in the U-shaped groove, the limiting piece is of a hollow structure, and an opening is formed in the limiting piece; one end of the arc-shaped piece is connected with the limiting piece, the other end of the arc-shaped piece extends clockwise in an arc shape and is matched with one clamping part, and the extending direction of the arc-shaped piece is the same as the thread direction of the bolt; and anticlockwise rotation of the nut is limited through cooperation of the arc-shaped piece and the clamping part, and the anti-loosening effect is achieved while the installation duration is not affected.

The utility model relates to the technical field of anti-seismic supports, in particular to a profile steel mounting structure for an anti-seismic support, which specifically comprises a profile steel body, a connecting base and a bolt assembly, the profile steel body comprises a first web and a first flange, a plurality of first pentagram holes are formed in the first flange along the length direction, and the bolt assembly comprises bolts and nuts. The bolt comprises a screw part and a pentagram part, the connecting base comprises a U-shaped connecting piece, a pentagram combination hole is formed in the U-shaped connecting piece, and at least two clamping structures capable of being in sliding clamping fit with the pentagram part are formed in the pentagram combination hole. In the installation process, according to the actual installation error, the pentagram part of the bolt can select the clamping structure at the proper position in the pentagram combination hole to be in sliding clamping connection with the first pentagram hole, fine adjustment of the profile steel installation position is achieved, the connection problem caused by the installation error is effectively solved, additional drilling is not needed, the construction cost is reduced, the construction time is shortened, and the construction efficiency is improved. And meanwhile, the structural strength of the profile steel is not influenced.

The present invention relates to a novel organic compound having the following structure: a , R b , R c , R d and R e Each independently represents a single substituent to the maximum permissible substituent, and each independently is selected from hydrogen, substituted or unsubstituted C1-C12 chain alkyl, substituted or unsubstituted C3-C12 cycloalkyl, substituted or unsubstituted C1-C12 alkoxy, halogen, cyano, nitro, hydroxyl, silane, amino, substituted or unsubstituted C6-C30 arylamino, substituted or unsubstituted C3-C30 heteroarylamino, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl, at least one hydrogen in the compound structure represented by formula (1) is deuterated. When the compound of the present invention is used as a light-emitting layer material in an OLED device, it exhibits excellent device performance and stability. The present invention also protects an organic electroluminescent device using the compound of the above general formula.

The utility model discloses a pin shaft node temporary support structure in space structure, it includes front support subassembly and rear support subassembly, and front support subassembly and rear support subassembly set up respectively in the front side and rear side of upper hinge base opposite lower hinge base rotation direction, and front support subassembly and rear support subassembly include first square steel pipe, second square steel pipe and jack, and first square steel pipe can be inserted in second square steel pipe and slide up and down, and the upper end of first square steel pipe is in abutment with the connecting top plate of upper hinge base, and the lower end of second square steel pipe is in abutment with the connecting bottom plate of lower hinge base, the side wall of first square steel pipe is welded with first supporting plate, and the side wall of second square steel pipe is welded with second supporting plate, and the jack is placed on second supporting plate, and the jacking end of jack is in abutment with first supporting plate, and first square steel pipe and second square steel pipe are fixed through bolt. Adopt the utility model, can solve the problem of the complex installation of temporary support structure in the prior art, inconvenient adjustment, insufficient stability.

The utility model discloses an automatic insulin needle dismounting device which comprises a box body, a cover and a clamping mechanism. A cover is hinged to the side wall of the box, a mounting cavity is formed in the middle of the upper end of the box, a storage cavity is formed in the box, and a mounting groove is formed in the front end of the mounting cavity and movably connected with a clamping mechanism. A button switch is arranged at the upper end of the cover to control on-off of a device circuit, and a fixed switch is arranged at the front end of the cover to control opening and closing of the cover. The clamping mechanism comprises a motor, a transverse rod is arranged on an output shaft of the motor, first telescopic rods are hinged to the two ends of the transverse rod, an electromagnet is arranged in the middle of the transverse rod, and an elastic element is arranged at the front end of the electromagnet and movably connected with a connecting rod. The two ends of the connecting rod are hinged to sliding blocks and movably connected with first telescopic rods. A second telescopic sleeve is hinged to the front end of the first telescopic rod and is a Z-shaped telescopic sleeve, one end of the Z-shaped telescopic sleeve is hinged to the first telescopic sleeve, the other end of the Z-shaped telescopic sleeve is provided with a clamping flap, and the middle of the Z-shaped telescopic sleeve is a telescopic sleeve.

The utility model discloses an electronic circuit board welding positioning tool which comprises a base, a first sliding hole is formed in the top end of the base, a second sliding hole is formed in the bottom end of the first sliding hole, a spline groove is formed in the inner wall of the upper portion of the second sliding hole, a spline shaft is arranged in the spline groove in a matched mode, a rotating shaft is connected to the spline shaft, and a tray is connected to the rotating shaft. The tray is provided with a fixed plate and an internal thread block, the internal thread block is in threaded connection with a screw, one end of the screw is connected with a hand wheel, the other end of the screw is rotatably provided with a movable plate, the movable plate and the fixed plate are parallel to each other, and notches are formed in the sides, close to each other, of the movable plate and the fixed plate. The movable plate is pushed to move towards the direction of the fixed plate by rotating the hand wheel screw, so that the circuit board is fixed in the notch, a positioning effect is provided for the circuit board, and the problem that an electric soldering iron pushes the circuit board to move when an electronic component is welded is solved.