32 results about "Mouth surface" patented technology

A liquid ejection apparatus includes an ejection unit including a first ejection unit having a first nozzle surface in which a first nozzle is opened, the first ejection unit being configured to eject a first liquid from the first nozzle onto a medium, and a second ejection unit having a second nozzle surface in which a second nozzle is opened, the second ejection unit being configured to eject a second liquid from the second nozzle onto a medium, the second liquid containing a component for coagulating the first liquid, a detection unit configured to detect contact between the ejection unit and a medium, and a notification unit configured to perform notification of information for prompting confirmation of the first nozzle surface and the second nozzle surface when the detection unit detects contact between the ejection unit and a medium.

A pull type rotary massage nozzle sequentially includes a nozzle holder, a nozzle core seat, a nozzle surface cover, and a nozzle core assembly. The nozzle core seat is detachably mounted on the nozzle holder. The nozzle surface cover is fixedly mounted on the nozzle core seat. The nozzle core assembly is mounted in the nozzle core seat and may circumferentially rotate about a mounting axle relative to the nozzle core seat and the nozzle surface cover, and may also axially float or sink along the mounting axle relative to the nozzle core seat and nozzle surface cover. The nozzle surface cover is provided with a static torsion rib. The nozzle core assembly is provided with a dynamic torsion rib. The dynamic torsion rib is selectively engaged with or separated from the static torsion rib along with floating or sinking of the nozzle core assembly.

The invention discloses an anti-flying and anti-warping tuyere, a blower and a tuyere using method. The anti-flying and anti-warping tuyere comprises a tuyere shell, a tuyere support assembly and a sliding piece assembly. The air flow direction is switched through the left and right keys, the left and right hand holding habits are adapted, the operation convenience is improved, the two-channel design is combined with the coanda effect, the air flow coverage range is expanded, short and broken hair is effectively adsorbed, additional tools are not needed, and air flow switching and hair styling can be completed through one-hand holding; the fixed design of magnets and screws ensures the reliability of long-term use of the assembly; when the anti-tilting air nozzle is used and a machine is close to disordered hair, the machine combs air from top to bottom to suck the hair into the surface of the anti-tilting air nozzle, and air pressure drives the hair and the hair combing groove of the support outside the air nozzle to rub the hair; the hair straightener has the function of preventing the hair from being warped or disordered, is convenient to use and has a good effect of preventing the hair from being warped.

The utility model provides a rubber sealing ring for a variable pitch bearing and a yaw bearing of a wind driven generator, which belongs to the technical field of wind driven generators, overcomes the defect of poor dustproof effect caused by early abrasion of an inner ring or an outer ring of a bearing due to the existing rubber sealing ring, and comprises a body, the dustproof lip is characterized in that the dustproof lip is provided with a convex cambered surface capable of being in rotary contact with the inner side face of an outer ring or an inner ring of a variable pitch and yaw bearing, a concave cambered surface is further arranged in the direction where the dustproof lip is connected with the body, the concave cambered surface is smoothly connected with the convex cambered surface, lip opening surface contact can be achieved, temperature rise is slow, and the dustproof lip is not prone to falling off. Early-stage abrasion of the inner ring or the outer ring of the variable pitch and yaw bearing can be effectively prevented, and meanwhile, the dustproof effect is also improved; the concave cambered surface supplements lubricating grease for the convex cambered surface lip, so that the service life of the convex cambered surface lip is further prolonged; due to the fact that the semicircular arc arranged in the concave mode is connected with the sealing lip, the elasticity of the sealing lip is improved.

The utility model discloses a die head lip surface cleaning device which comprises a cleaning mechanism, the cleaning mechanism comprises a cleaning tank body, a soaking tank body is arranged in the cleaning tank body, a soaking tank is arranged in the soaking tank body, and the cleaning mechanism further comprises two sliding cover plates and two cover plate driving mechanisms. The two sliding cover plates are oppositely arranged and slidably arranged at the top end of the cleaning tank body, the soaking tank is located below the position between the two sliding cover plates, and the two cover plate driving mechanisms are used for driving the two sliding cover plates to move in the direction close to or away from the soaking tank. The die head lip surface cleaning device further comprises two scraper atomization mechanisms and two blowing mechanisms, and the two scraper atomization mechanisms are oppositely arranged and correspond to the two sliding cover plates respectively. According to the utility model, the cleaning time can be saved, the cleaning efficiency is improved, and the condition of liquid hanging on the surface of the lip of the die head can be avoided.

The invention belongs to the technical field of cigarette tipping paper taste substance analysis, and particularly relates to a bionic simulation collection device and an analysis method for the dynamic migration quantity of taste substances in taste tipping paper. The bionic simulation collection device comprises a simulation lip, a simulation oral cavity, a smoke collector and a smoke suction machine which are sequentially communicated from upstream to downstream. The analysis method comprises the following steps: S1, connecting an artificial lip and a simulated oral cavity with a smoking machine, and infiltrating with artificial saliva; s2, the taste tipping paper of the cigarette is fixed to an artificial lip, the surface of the artificial lip is attached to the surface of a filter tip, and in the smoking interval process, the cigarette is inserted and pulled out; s3, after smoking is finished, the artificial lip cleaning fluid and the simulated oral cavity cleaning fluid are collected, and the migration amount of the taste substances is detected. The method is closer to the actual cigarette smoking process, and powerful technical support can be provided for cigarette product research and development, smoke physiological feeling, smoking, health and other basic research.

The utility model relates to the technical field of bag opening machines, and discloses a transverse four-position suction cup servo bag opening machine, an upper suction cup assembly is used for adsorbing and positioning the surface of a bag opening from the position above the bag opening, and the upper suction cup assembly comprises four upper vacuum suction cups arranged transversely and a suction cup mounting plate C; the lower suction cup assembly is used for conducting suction positioning on the bottom face of the bag opening from the position below the bag opening. The lower suction cup assembly comprises four lower vacuum suction cups, a suction cup mounting plate A and a suction cup mounting plate B; the driving mechanism is a servo lead screw linear module and used for driving the upper suction cup assembly to ascend and descend so that the upper vacuum suction cup can be lowered to the surface of the bag opening or driving the upper vacuum suction cup to move upwards to open the bag opening. Servo screw rod linear module driving and four-station suction cup design are adopted, and the performance of the bag opening mechanism is remarkably improved. The former realizes accurate position control, stable movement, flexibility, adjustability and high repetition precision, and the latter enhances the adsorption force, adapts to different bag characteristics and improves the bag opening reliability.

The present disclosure may suppress adhesion of a liquid to a seal member used for moisturizing a nozzle surface. A seal member that is brought into contact with a seal position of a liquid jet head, a seal member support mechanism that supports the seal member to be movable and includes a swing member that supports the seal member to be swingable about a swing shaft extending along a first direction are provided, and in a case in which the seal member is moved in a second direction and a fourth direction as the liquid jet head of which a lower surface abuts on a head abutting position defined in the swing member moves in a third direction, the seal member is moved in a fourth direction by a distance, which is at least twice a moving distance in the second direction, and separated from the seal position.

The utility model discloses a double-air-outlet centrifugal fan with an improved tongue opening structure, which belongs to the technical field of centrifugal fan structure improvement and comprises an upper cover, fan blades and a base, a first air outlet and a second air outlet are arranged at the edge position between the upper cover and the base, and a second tongue opening is arranged between the first air outlet and the second air outlet. The second tongue opening comprises a front flow guide part, lateral flow guide parts are arranged on the two sides of the front flow guide part, a tail connecting part is arranged between the rear portions of the two lateral flow guide parts, a reference section is arranged in the middle of the second tongue opening, the section of the second tongue opening clockwise rotates around the circle center of an arc in the direction from the reference section to the base, and the rotation angle is gradually increased. The section of the second tongue opening rotates anticlockwise around the circle center of the arc in the direction from the reference section to the base, and the rotation angle is gradually increased. The air flow separation phenomenon at the position of the second tongue opening can be eliminated, the aerodynamic performance is greatly improved, meanwhile, the local high-low pressure gradient of the surface of the tongue opening can be reduced, and the sound quality is improved.

This utility model discloses a toothed pliers, belonging to the field of hand tool technology, including jaws A, handle A, jaws B, and handle B; jaw B is hinged to handle B, jaw B is hinged to handle A, handle B is hinged with a connecting rod, and a spring is provided between handle A and jaw B; a pressing element is hinged inside handle B; toothed jaws A and B protrude from the surface of the jaws, a groove A is provided at the connection between toothed jaw A and jaw A, and an arc groove A is provided on the surface of jaw A; toothed jaws B are provided at the connection between toothed jaw B and jaw B, and an arc groove B is provided on the surface of jaw B; the thickness of connecting blocks A and B is less than the thickness of the jaws; the surface area of ​​the jaws is increased without affecting the use of the pliers, so that the pressure is evenly distributed and stress concentration is avoided. At the same time, the high and low distributed connecting blocks further optimize the force transmission path, ensuring that the clamping force is applied to the workpiece more evenly, reducing damage to fragile materials, and also reducing the overall weight of the pliers.

The utility model provides a vacuum connecting structure and a vacuum cavity assembly, and relates to the field of vacuum sealing connection. The vacuum connecting structure comprises a first metal flange, a second metal flange and a third metal sealing ring, wherein the hardness of the second metal flange, the hardness of the first metal flange and the hardness of the third metal sealing ring are sequentially reduced; a first flange knife edge is arranged on the sealing end face of the first metal flange, and hardened layers are arranged on the sealing end face of the first metal flange and the surface of the first flange knife edge; a second flange knife edge is arranged on the sealing end face of the second metal flange; the first metal flange and the second metal flange are fixedly connected in the axial direction, and the first flange knife edge and the second flange knife edge are cut into the third metal sealing ring from the two sides of the third metal sealing ring respectively. According to the vacuum connecting structure, the hardened layers are arranged on the sealing end face and the knife edge surface of the first metal flange to improve hardness, so that the knife edge of the first flange can cut into one side of the third metal sealing ring, and therefore all-metal sealing connection can be achieved.

The invention discloses a double-station expanding and shrinking machine, and relates to the technical field of air conditioner accessory machining. An expansion and contraction mechanism; the expanding and shrinking mechanism is arranged on the base; through the rotary connecting assembly, direct insertion expansion and contraction or rotary expansion and contraction can be selectively carried out according to the thickness of the wall of the copper pipe in the expansion and contraction process; and the clamping mechanism is arranged on the base and is opposite to the expanding and shrinking mechanism. By arranging the rotatable insertion rod structure, a direct insertion type flaring mode is changed into a rotary insertion mode, and compared with the direct insertion type, the rotary insertion mode has the advantages that the deformation of the opening part of the copper pipe is more uniform and stable through uniform rotary force application and gradual deformation, so that the flaring precision is high, the size consistency is good, and the production efficiency is high. And secondly, in the rotary flaring process, the die and the copper pipe are in circumferential uniform contact, and the surface of a machined flaring is smoother, round and free of burrs.

The utility model relates to the technical field of cleaning devices, and discloses a mouthpiece cleaning device of a tube musical instrument, which comprises a cleaning pool, a cover plate is inserted into the top of the cleaning pool, a mounting bin is arranged at the bottom of the cleaning pool, an ultrasonic generator is fixedly connected to the inner bottom wall of the mounting bin, and the ultrasonic generator is electrically connected with a plurality of ultrasonic vibrators. The ultrasonic vibrator is fixedly connected to the inner top wall of the mounting bin, the mounting bin is formed in the bottom of the cleaning pool, a motor is fixedly connected to the middle of the inner top wall of the mounting bin, and a rotating shaft is fixedly connected to the driving end of the motor and sleeved with a sleeve. According to the cleaning device, the motor is started to drive the rotating shaft to drive the sleeve and the mounting plate to rotate together, when the mounting plate rotates, the musical instrument blowing nozzle is driven to rotate together, and when the musical instrument blowing nozzle rotates, friction is generated between the musical instrument blowing nozzle and the cleaning liquid, so that the contact efficiency and strength of the cleaning liquid and the surface of the blowing nozzle are improved, and the cleaning effect of the cleaning liquid is improved.

The application discloses a welding device before heat treatment applied to high-pressure gas cylinder production and relates to the technical field of welding equipment. In the application, when the gas cylinders are butt-jointed by being pushed by the air cylinders, the relative extrusion force between the gas cylinders triggers the central gathering friction mechanism, the two gas cylinders are driven by the central gathering friction mechanism to rotate in the forward and reverse directions at the same time of butt-joint, the rotating force can make the closely attached bottle mouths rub against each other, the symmetrical reverse friction between the rough bottle mouth surfaces can efficiently remove the welding spots on the bottle mouths and straighten the warped edges to a certain extent, the adhesion between the bottle mouths is improved, the occurrence of the false welding condition is avoided, the stability of the gas cylinder connection in the operation process is ensured, the heat in the gas cylinder can be uniformly distributed after the gas cylinder enters the heat treatment bin, the heat treatment efficiency is improved, and the unnecessary energy loss caused by the defective / substandard products in the gas cylinder processing flow is correspondingly reduced.

The utility model discloses a through-wall sealing structure of a cabinet and a pipeline in the technical field of liquid cooling radiators, and aims to solve the problems of poor sealing performance and high processing precision requirement of the through-wall sealing structure of the pipeline in the prior art. The method has the advantages that the precision requirement for part manufacturing is lowered, the manufacturing cost is reduced, sealing of a gap between the adapter and a cooling liquid pipeline and a gap between a pipe orifice surface and a first step is achieved by replacing a second sealing ring and a third sealing gasket which are different in size or thickness, and the sealing requirement for leakage prevention is met; even if the sealing of the second sealing ring and the third sealing gasket fails, the first sealing gasket based on the flange surface as the support can prevent the cooling liquid from seeping into the cabinet wall. The adapter is connected with the cabinet wall, the flange face serves as a support, and the cooling liquid pipeline is indirectly fixed to the cabinet wall through the flexible extrusion effect of the first sealing gasket, the second sealing ring and the third sealing gasket, so that stress deformation gaps are prevented, and sealing is ensured.

The utility model relates to a lengthened spout, and belongs to the technical field of printing glue pouring kettles.The lengthened spout comprises a kettle body and a lengthened pipe, the right side wall of the kettle body is fixedly connected with the spout, a lantern ring is fixed to the outer surface of the kettle body, and a sealing ring used for enhancing the sealing performance between the spout and the lengthened pipe is fixed to the right side wall of the lantern ring; a sealing structure for sealing the lengthened pipe is arranged on the right side of the lengthened pipe, and a dismounting structure for fixing the lengthened pipe on the surface of the spout is arranged at the left side end of the lengthened pipe; the sealing structure comprises a sleeve block, a sealing block and connecting blocks fixedly installed on the front wall and the rear wall of the sealing block. According to the lengthened spout, the outflow end of the lengthened pipe can be sealed and blocked so that air can be isolated from glue, the phenomenon that the glue is solidified due to the fact that the glue makes contact with the air can be reduced, and therefore the phenomenon that the spout and the lengthened pipe are blocked due to the fact that the glue is solidified can be reduced, and the lengthened pipe can be detached and replaced conveniently.

The invention discloses a gap-adjustable forming die, and relates to the technical field of prepreg manufacturing. The opposite surfaces of an upper die body and a lower die body are respectively provided with a die orifice adjusting mechanism which can eject out and pull back a die orifice so as to compensate the thermal deformation of the die orifice. According to the gap-adjustable forming die provided by the invention, the die orifice is ejected out of the mounting groove or pulled back into the mounting groove through the die orifice adjusting mechanism, so that thermal deformation of the die orifice is actively compensated, and the planeness of the die surfaces of the die and the parallelism between the die surfaces of the die are maintained.

The present invention discloses a clutch housing clamping sling, which includes a body, a pneumatic driving unit, a power transmission unit, a first clamping unit, and a second clamping unit; the pneumatic driving unit is connected to the power transmission unit; the first clamping unit and the second clamping unit are arranged at intervals on the power transmission unit; the first clamping unit includes a support member and a first clamping member, and the first clamping member is movably arranged in a direction close to or away from the center of the first clamping unit; when the mouth surface of the clutch faces upward, the first clamping member is clamped with the outer edge of the mouth surface of the clutch; the second clamping unit includes a second clamping member, and the second clamping member is movably arranged in a direction away from or close to the center of the second clamping unit; when the mouth surface of the clutch faces downward, the second clamping member is clamped with the bearing hole of the clutch. This device uses one power source to achieve two clamping actions and is applied to clamping parts in different postures. It effectively improves the feeding efficiency of parts.

The invention discloses an inner cavity supporting device for cylindrical part machining. The inner cavity supporting device comprises a front supporting sleeve, a rear supporting sleeve, a clamping block, a clamping ring, a pull rod and pull rod driving equipment. The front end of the pull rod is inserted into an inner cavity of the front supporting sleeve, the clamping blocks are installed in the clamping block positioning holes of the front supporting sleeve respectively, the outer ring of the front supporting sleeve is sleeved with the clamping blocks, and the clamping blocks are limited in the clamping block positioning holes of the front supporting sleeve in the radial direction. The front end of the rear supporting sleeve is fixed with the rear end of the front supporting sleeve; and the pull rod driving equipment is installed between the inner bottom of the rear supporting sleeve and the rear end of the pull rod, the pull rod driving equipment drives the pull rod to move backwards, and the pull rod pushes the clamping blocks to extend outwards in the radial direction through the circular truncated cone positioning section to clamp the inner wall of the cylindrical blank. According to the inner cavity supporting device, the cylindrical part with an irregular molded surface at the opening part is reliably supported.

The utility model provides a dual-purpose bottle neck for adding powder into a bottle, which belongs to the technical field of printers and comprises a bottle neck mechanism comprising a main bottle neck and an auxiliary bottle neck arranged on the surface of the main bottle neck; the sealing mechanism comprises a sealing part used for improving the use sealing performance of the main bottle nozzle and the auxiliary bottle nozzle and a carbon powder anti-overflow part arranged on the surface of the main bottle nozzle in a sleeving mode and used for improving the sealing performance of the main bottle nozzle and the powder bin connector, and the sealing part comprises a sealing block used for sealing the opening of the main bottle nozzle and a sealing plug used for sealing the opening of the auxiliary bottle nozzle. The sealing component is used for improving the overall sealing performance of the carbon powder bottle, and carbon powder is prevented from being affected with damp or entering dust to affect the quality of the carbon powder during storage; the matching degree of the main bottle mouth and the printer powder bin interface is increased through the carbon powder anti-overflow part, the rubber sleeve can be in butt joint with different sizes of powder bin interfaces due to the elasticity and the inclined plane of the rubber sleeve, and the carbon powder is prevented from overflowing from a gap to pollute the environment or damage equipment during powder adding.

The utility model discloses a telescopic shower rod wall base. The telescopic shower rod wall base comprises a telescopic wall base body. By arranging the telescopic wall base, when the height adjustment action is carried out, the sliding sleeve is held and pulled downwards firstly, the sliding sleeve slides to leave the surface of the movable opening, at the moment, the top port of the telescopic sleeve loses external pressure to relieve the condensation state, the telescopic rod recovers to the movable state, and a user can hold the telescopic rod to move up and down to adjust the height of the hanging base; and finally, the sliding sleeve is loosened, the sliding sleeve is pushed to be sleeved outside the movable opening through the elastic force of deformation recovery of the reset spring, so that a top port of the telescopic sleeve is forced to contract inwards to clamp and fix the telescopic rod, height adjustment can be completed, tools are not needed, field adjustment of a user is facilitated, and the telescopic wall base is of a telescopic structure and is more compact in structure. Requirements on installation space are greatly reduced, and popularization is easy.

The utility model relates to the technical field of quenching devices, in particular to a pipe wrench cutting edge surface quenching device which comprises a platform, an L-shaped base is fixed to the top of the platform, a containing groove is formed in the top of the L-shaped base, and an empty groove is formed in the bottom in the containing groove. A pipe wrench body is placed in the placing groove; a sliding groove is formed in the top of the platform, a sliding block is installed in the sliding groove, a vertical bar is fixed to the top of the sliding block, and a rack is fixed to the top of the vertical bar. A connecting base is fixed to the top of the platform, a motor is installed on the connecting base, and a gear meshed with the rack is fixed to the output end of the motor. According to the quenching device for the cutting edge of the pipe wrench body, the double surfaces of the cutting edge of the pipe wrench body can be quenched at the same time, the working efficiency is high, the production efficiency of the pipe wrench body is improved, and the existing requirements can be met.

The utility model discloses a transparent blowing nozzle for a medical disinfectant tester, which is applied to the technical field of medical disinfectant testers and comprises a transparent blowing nozzle, one end of the transparent blowing nozzle is communicated with a transparent air pipe, and one end of the transparent air pipe close to the transparent blowing nozzle is fixedly connected with a threaded port in threaded connection with the threaded port. When a detected person blows air into the medical disinfectant tester through the transparent blowing nozzle, the plastic colored ribbons on the surface of the sliding rod are driven to float downwards into the transparent air pipe, a traffic police can observe whether the plastic colored ribbons float or not to prevent false blowing of the detected person, and the detection accuracy of the medical disinfectant tester is guaranteed. The medical disinfectant in the medical disinfectant storage cavity is pressed and squeezed into the wiping cotton, so that the medical disinfectant in the wiping cotton is used for disinfection in the process of wiping the surface of the transparent blowing nozzle. Therefore, the transparent air blowing pipe does not need to be replaced repeatedly, cost is reduced, traffic police do not need to wipe manually, and efficiency is improved.

The utility model relates to the technical field of pig mouth processing, in particular to a soaking and fishy smell removing device for pickling pig mouths, and solves the problems that the soaking work is too single when the pig mouths are pickled in a soaking method in the prior art, the pig mouths are usually simply put into soaking liquid, the soaking uniformity and effectiveness are difficult to ensure, and the pickling time is short. The fishy smell in partial areas is not thoroughly removed, so that the subsequent processing work and the final product of the pig arch-shaped mouth are influenced. The soaking deodorization device for pickling the pig mouth comprises a frame body, the inner side of the frame body is slidably connected with a bearing leakage frame, and the two sides of the top of the bearing leakage frame are both fixedly connected with side pipes. According to the device, the problem that in the prior art, soaking liquid cannot make full contact with all parts of the pig arch mouth is solved, soaking uniformity and effectiveness are improved, external water can be evenly sprayed to the pig arch mouth through the design of the pump body and the spray pipe, and impurities and residues on the surface of the pig arch mouth can be removed easily.

The application is based on the antenna radiation efficiency testing method of the noise injection balanced receiving system: the normalized power pattern in the whole space solid angle of the antenna is tested; the calibration signal inside the noise injection receiver is obtained according to the balanced mode of the noise injection receiver; the antenna is connected to the input end of the noise injection balanced receiving system, the mouth surface calibration source is placed on the antenna, the temperature of the mouth surface calibration source is set, the corresponding noise injection duration is output by the processing collector, the antenna output signal is obtained by using the balanced mode of the noise injection balanced receiving system and the calibration signal; the ideal output signal of the antenna without the influence of the radiation efficiency is calculated by using the antenna power pattern, the temperature signal of the mouth surface calibration source and the darkroom temperature; the relationship between the antenna output signal obtained by the noise injection balanced receiving system and the ideal output signal of the antenna without the influence of the radiation efficiency is established, and the radiation efficiency of the antenna is calculated.

Provided are schemes, solutions, concepts, designs, methods and systems for controlling an oral care device including an integrated lighting device. Specifically, operating state values (e.g., position and motion data, oral care processing element cycle monitoring data, and / or contact force data) indicative of real-time motion and position of the oral care device relative to an oral surface are obtained. The operational state value and the mouth surface geometry of the user are processed using a predictive model. The predictive model is adapted to map operating state values and oral surface geometry to physical behavior of the oral care device, thereby to a predicted location and a predicted deformation of the oral care device. Depending on the predicted position and the predicted deformation, control parameters for the lighting device may be determined that are suitable for controlling the lighting device to illuminate a target portion of a user's oral surface (e.g., a dental space or gingival line). Accordingly, it is possible to more effectively control the lighting device to irradiate a target area of the oral cavity surface.

A liquid ejection apparatus includes an ejection unit including a first ejection unit having a first nozzle surface in which a first nozzle is opened, the first ejection unit being configured to eject a first liquid from the first nozzle onto a medium, and a second ejection unit having a second nozzle surface in which a second nozzle is opened, the second ejection unit being configured to eject a second liquid from the second nozzle onto a medium, the second liquid containing a component for coagulating the first liquid, a detection unit configured to detect contact between the ejection unit and a medium, and a notification unit configured to perform notification of information for prompting confirmation of the first nozzle surface and the second nozzle surface when the detection unit detects contact between the ejection unit and a medium.

An oral expansion device for stretching a patient's mouth skin comprises a main body positioned between teeth and inner mouth surface, and a first body rotatably coupled to the main body. The first body mechanically rotates about an axis on the main body, pressing against the interior mouth surface to stretch the patient's skin away from the teeth. The device features a rotatable knob connected to a threaded rod that moves an expansion member forward and aft within the main body. As the knob turns, the expansion member slides within a slot in the main body and pushes against an angled second slot in the first body, causing the first body to raise and lower into open and closed positions. The main body may include a first member that tapers out toward a second member, with the first body connected at a pivot point.

The utility model discloses a portable indoor environment-friendly deodorization box, which belongs to the field of air purification and comprises a deodorization cylinder, an inner cavity is arranged inside the deodorization cylinder, a wide-mouth surface is arranged at the outer ring of an opening of the inner cavity, a driving motor is fixedly connected inside the deodorization cylinder, and the inner ring of the inner cavity is provided with an air inlet and an air outlet. A negative pressure fan is fixedly connected to an output shaft of the driving motor, a drainage conical plate is fixedly connected to the center of the interior of the inner cavity, a liquid storage cylinder is slidably connected to the discharge end of the inner cavity, and a liquid storage cavity for storing deodorant liquid is formed in the liquid storage cylinder. The connecting assembly is used for connecting the liquid storage cylinder with the deodorization cylinder body; and indoor peculiar smell and harmful gas are sucked into the inner cavity through a built-in driving motor and a built-in negative pressure fan. And then, the gases are guided into the deodorization liquid in the liquid storage barrel under the action of the drainage conical plate and the drainage pipe, and are in full contact with the deodorization liquid to react, so that peculiar smell and harmful gases are effectively removed.

The utility model discloses a kind of vibrating screen cleaning devices, it includes dust collection box, dust collection box is provided with suction port and suction port, the surface of dust collection box is provided with cavity mouth, cavity mouth surface is fastened to have detachable cover plate by screw, the inside of dust collection box is provided with filter screen, filter screen will the inside of dust collection box be divided into respectively with suction port, suction port communication suction cavity, suction cavity, the suction port of dust collection box is connected with suction pump by suction pipe, the suction port of dust collection box is connected with handle by suction pipe, handle is connected with dust collection pipe, the end of dust collection pipe is provided with dust collection nozzle, the surface of handle is provided with for opening and closing suction pump switch button. The utility model has the characteristics of structure design reasonable, practicality is strong, cost is low, cleaning efficiency is high, the utility model can quickly and efficiently suck out the waste in the screen hole of vibrating screen by the negative pressure suction function of suction pump, reduce the labor intensity of artificial cleaning waste in vibrating screen screen hole.