48results about How to "Increase rotational friction" patented technology

Embodiments of the invention relate to electrophysiology catheters and methods of using the same. According to one embodiment, the catheter includes a braided conductive member at its distal end that can be radially expanded, for example using a mandrel slidably disposed within a shaft of the catheter. According to another embodiment, the catheter comprises a tip portion constructed of an elastomeric material. According to a further embodiment, the catheter includes a braided conductive member wherein a thermocouple is formed using one filament of the braided conductive member and one thermocouple wire. Other embodiments of the invention relate to a handle for use with a catheter and methods of using the same. According to one embodiment, the handle comprises a thumbwheel coupled to a housing, a spring disposed within the housing in contact with the thumbwheel, and means for increasing compression of the spring to increase rotational friction on the thumbwheel.

A power tool for fastening objects has a housing with a non-rotatable element, a power drive in the housing and provided with a rotatable driving element, and a fastener part including a bolt having a thread and an axis and introducable into parts forming an object, a nut screwable on the bolt and cooperating with the rotatable driving element, and a washer to be applied between the nut and an object and cooperating with the non-rotatable element, the washer having an axis and being provided with a first bearing face surface located at one axial side and adapted to cooperate with the nut, a second bearing face surface located at an opposite axial side and adapted to cooperate with the object, and at least one third turning resistant surface adapted to cooperate with the thread of the bolt, so that when driving element turns the nut with a given active force in one direction and the washer is held stationarily applied by the non-rotatable element of the housing, the nut turns to tighten or loosen the bolt, and the washer remains rotation stationary while the bolt elongates or relaxes in an axial direction.

Embodiments of the invention relate to electrophysiology catheters and methods of using the same. According to one embodiment, the catheter includes a braided conductive member at its distal end that can be radially expanded, for example using a mandrel slidably disposed within a shaft of the catheter. According to another embodiment, the catheter comprises a tip portion constructed of an elastomeric material. According to a further embodiment, the catheter includes a braided conductive member wherein a thermocouple is formed using one filament of the braided conductive member and one thermocouple wire. Other embodiments of the invention relate to a handle for use with a catheter and methods of using the same. According to one embodiment, the handle comprises a thumbwheel coupled to a housing, a spring disposed within the housing in contact with the thumbwheel, and means for increasing compression of the spring to increase rotational friction on the thumbwheel.

A fishing reel including a housing having a central hub and a main shaft having a proximal end and a distal end, the main shaft being non-rotatably fixed to the central hub at its proximal end. A spool having a central recess is releasably secured to the main shaft distal end and a one-way clutch having a central bore is non-rotatably received in the central recess. The reel also includes a drag assembly with a drag housing having a drag surface and a central aperture, the drag housing being fixed to the central hub of the housing such that a drag cavity is formed therebetween. A sleeve extends along the main shaft and has a first portion received in the central bore of the one-way clutch and a second portion extending into the drag cavity. A first drag washer is disposed in the drag cavity and non-rotatably fixed to the second portion of the sleeve and a drag knob is rotatably secured to the housing. Rotation of the drag knob in a first direction urges the drag washer axially along the sleeve toward the drag surface and increases rotational frictional force on the first drag washer. Rotation of the drag knob in a second direction reduces rotational frictional force exerted on said first drag washer.

A fishing reel including a housing and a nonrotatable main shaft fixed to the housing. A spool including a one-way clutch having a central bore rotatable about the main shaft is also provided. The reel further includes a sleeve located coaxial to and extending along the main shaft. The sleeve is supported for rotation by first and second bearing assemblies. The first bearing assembly has an inner race fixed with respect to the main shaft and an outer race fixed with respect to an inner surface of the sleeve. The second bearing assembly has an inner race fixed with respect to an outer surface of the sleeve and an outer race fixed with respect to the central hub. At least one drag washer is non-rotatably located on the sleeve. An end of the sleeve adjacent the first bearing assembly is received in the one-way clutch.

The invention discloses a rotary shaft device and a folding electronic device with same. The rotary shaft device comprises a bearing part, a first rotary connector, a second rotary connector, a friction mechanism and a holding mechanism, wherein the first rotary connector comprises a first rotary shaft and a first bracket, the first rotary shaft is pivotally connected to the bearing part, the first bracket is fixedly connected to the first rotary shaft; the second rotary connector comprises a second rotary shaft and a second bracket, wherein the second rotary shaft is pivotally connected to the bearing part and opposite to the first rotary shaft; the second bracket is fixedly connected to the second rotary shaft; the friction mechanism is used for providing friction force for rotating the first rotary shaft and the second rotary shaft; the holding mechanism can be used for keeping the first bracket and the second bracket in an open state. The rotary shaft device has relatively great rotary friction force, good rotary connecting effects, long service life, and stability and firmness in connection; the friction force is almost not damped after long-term use.

The invention discloses a pretightening-force-adjustable friction-type anchorage device applied to a fiber-reinforced composite material rib inhaul cable. The pretightening-force-adjustable friction-type anchorage device comprises a cover plate A, a cover plate B, a column core with a spiral groove, and an inhaul cable fastener, the cover plate A and the cover plate B are provided with spiral grooves respectively, sections of the spiral grooves in the cover plates and the column core are all semicircles identical in diameter, the spiral grooves in the two cover plates and the column core are matched with one another to form a space spiral groove with a round section, an inlet hole and an outlet hole are formed at the starting point and the ending point of the spiral groove of the cover plate A, an FRP (fiber reinforced polymer) rib inhaul cable identical with the section of the spiral groove in diameter penetrates the inlet hole of the cover plate A, is wound in the spiral groove in the column core and penetrates the outlet hole of the cover plate A, the FRP rib inhaul cable is wrapped by a curved surface of the space spiral groove formed by the cover plates and the column core, and the tail end of the FRP rib inhaul cable is fixed by the inhaul cable fastener mounted on the cover plate A. The pretightening-force-adjustable friction-type anchorage device applied to the fiber-reinforced composite material rib inhaul cable is reasonable in structure, reliable in performance and durable.

The invention belongs to the technical field of intelligent driving automobile parts, and particularly relates to an intelligent driving automobile radar installation device with multi-application scenarios. The intelligent driving automobile radar installation device with the multi-application scenarios comprises a fixed seat. A supporting barrel is arranged at the upper end of the fixed seat, and supporting rods are slidably connected with the inner part of the supporting barrel in an inserting mode; rotating discs are arranged at the top ends of the supporting rods, and arc-shaped splinesare rotatably arranged on the rotating discs; fixing plates are arranged on the arc-shaped splines, internal threads are arranged on the supporting barrels, and first sliding grooves are formed in thesupporting barrels; adjusting units are arranged in the supporting barrels, and the adjusting units are not only used for the height adjustment of radar detection, but for left-right adjustment, thephenomenon that the detection range of the height and angle of a radar device is influenced due to the fact that an automobile body go downside when an automobile is empty loaded or full loaded is avoided, the technical problem that the radar detection angle and height can not be adjusted according to needs of the scenarios is efficiently solved; and automatic adjustment of the radar device can berealized, and thus the adjusting height and angle of the radar can be more precise and more stable.

A hinge module is disposed between a first body and a second body. A first bracket is fixed on the first body to fix a shaft. A second bracket is fixed on the second body and passed through by the shaft, so that the second bracket can be rotated relative to the first bracket. An electromagnet is installed on the shaft. A magnetic element is installed on the shaft, and capable of being attracted or repelled with the electromagnet. At least one of the electromagnet and the magnetic element is capable of being moved along the shaft axially but substantially incapable of being rotated with the shaft as an axis. When the electromagnet is activated, at least one of the electromagnet and the magnetic element is axially moved to press the second bracket to increase a torque of a rotation of the second bracket relative to the first bracket.

A roller blind comprises a main frame girder, a left fixing seat and a right fixing seat respectively on bilateral sides of the main frame girder, a rotary sealing cap installed on the right fixing seat, a rolling device sleeved on one end of the sealing cap, a control device fixed on the left fixing seat and used for connecting one end of the rolling device, and a curtain capable of being rolled on the rolling device. The control device comprises an outer sleeve body, a rotating unit installed inside one side of the outer sleeve body, a locating rod in shaft connection with the rotating unit and fixed on the left fixing seat, and a connecting seat installed inside the other side of the outer sleeve body and used for sleeving and fixing one end of a shaft rod of the rolling device. The other side of the outer sleeve body is nested on one side of the rolling device. The circumference of the rotating unit having a sleeve is annularly provided with at least one soft cushioning ring which completely contacts with the inner wall of a rotating body. The rotating body can be driven to change the rail with the help of the soft cushion ring, so as to stretch, roll and locate the curtain; meanwhile, the rotation friction of the rotating body as well as the cushion effect of rolling the curtain can be increased.

The invention discloses a flow dividing rotary disc for cleaning equipment of net clothing in deep water net cage and a graded rotation speed regulating method thereof. From the first step to the third step, the flow dividing rotary disc can be stably auto-rotated under rotation speed being close to stable rotation speed omega of a predetermined target, the phenomenon that graded rotation speed control of the flow dividing rotary disc can be achieved more accurately under the condition of constant high-pressure water-supply water pressure and no need of additional auxiliary speed regulation mechanism is realized, and thus, appropriate target stable rotation speed omega can be set based on net cage culturing fouling organism attachment types of the net clothing required to be cleaned in the deep water net cage, the best rotation speed of the flow dividing rotary disc is configured when the net clothing is cleaned, and improvement of the cleaning efficiency of the net clothing in the deep water net cage and the removal ratios of the fouling organisms is realized. According to the flow dividing rotary disc disclosed by the invention, the flow dividing rotary disc is stably auto-rotated under rotation speed being close to stable rotation speed omega of the predetermined target while the rotation smoothness of the flow dividing rotary disc can be ensured at the same time, and the cleaning efficiency of the net clothing in the deep water net cage and the removal ratios of the fouling organisms are improved.

The invention provides a coiled material packaging machine which comprises an unwinding device and a crimping device. The unwinding device comprises a sliding base and an unwinding roller, an unwinding support is arranged below the unwinding roller and movably connected with the sliding base through sliding wheels, and a transition roller a and a computer deviation rectification device are arranged between the unwinding device and the crimping device. The crimping device comprises a crimping rack which is provided with a transition roller b, a wind-up roller, a crimping carrier roller and a crimping rubber carrier roller, and a rotating shaft of the wind-up roller, a rotating shaft of the crimping carrier roller and a rotating shaft of the crimping rubber carrier roller are connected in a tangent mode. The crimping rubber carrier roller is connected with a rotating shaft of a crimping motor through a transmission chain in a rotating mode. The packaging machine is widely used for full-automatic packaging of various coiled materials, the occurrence rate of the situation that crimped single edges are uneven and loosened crimping exists is reduced, and the packaging speed and packaging quality are effectively improved.

A stroller handle adaptor having a first handle assembly rotationally coupled to the first end of a shaft having a shaft axis, the first handle assembly further comprising a first cylindrical housing having a first axis with a first handle protruding tangentially therefrom, wherein the first handle rotates about the first axis and the first axis is offset from the shaft axis, a second handle assembly rotationally coupled to the second end of the shaft, the second handle assembly further comprising a second cylindrical housing having a second axis with a second handle protruding tangentially therefrom, wherein the second handle rotates about the second axis and the second axis is offset from the shaft axis, wherein the stroller handles assembly is adapted to couple to an existing stroller handle.

The invention discloses a wheel component. The wheel component comprises an integrated hub, a tire bead movable stop block, an inflating valve and a tire, wherein the tire bead movable stop block comprises a rotating shaft and a baffle plate structure, can move in the diameter direction of the integrated hub and can be mounted in a round hole structure in the side wall of a rim groove of the integrated hub in a sliding and / or rotating manner; the baffle plate structure is a cam structure and can rotate around the axis of the rotating shaft; and the tire is not provided with a tire tube. During tire installation, the tire bead movable stop block is not higher than a protruding peak of a hub rim bead seat, so that successful installation of the tire is guaranteed; after the tire bead is mounted on the bead seat of the integrated hub, the tire bead movable stop block slides and / or rotates to enable the baffle plate structure to be higher than the protruding peak of the hub rim bead seat so as to prevent the tire bead from sliding into the groove of the integrated hub; and the wheel component can prevent traffic accidents caused by disengagement of the tire and the hub, so that the driving security is improved.

The invention discloses a water turbine capable of automatically descaling the back surface of a wheel fan. The water turbine comprises a box body, wherein a flushing pipe is arranged on the left sideof the box body in a penetrating manner; a water outlet pipe is fixedly connected to the bottom of the box body; a wheel body is rotatably connected inside the box body; a bearing ring is rotatably connected inside the wheel body; the wheel fan is arranged on the surface of the wheel body in a penetrating manner; a water spraying pipe is slidably connected to one side, close to a wheel center, ofa water pushing rod; a water inlet pipe is fixedly connected to the side surface of the water spraying pipe; a hollow pipe is engaged with the side surface of a transmission gear rod; a speed changegear is engaged with the side, away from the wheel center, of a transfer rod; a transmission gear is engaged with the side surface of the speed change gear; and a scraping wheel is arranged at the side surface of the transmission gear in a penetrating mode. According to the water turbine capable of automatically descaling the back surface of the wheel fan, a bearing gear is matched with the scraping wheel to use, so that the effect of automatically descaling the back surface of the wheel fan when the water turbine runs is achieved.

The invention relates to the technical field of water faucet auxiliary maintenance, and discloses a device for removing scale on the inner side wall of a direct drinking water faucet port. The devicecomprises a handle. The left end face of the handle is fixedly connected with a positioning round block through bolts. The lower surface of the positioning round block is fixedly connected with a micro motor through bolts. An output shaft of the micro motor penetrates the lower surface of the positioning round block and is fixedly connected with a round connection box. A supporting ventilation thin pipe is welded to the position of a ventilation opening in the middle position of the top of the round connection box. The side face of the tail end of the supporting ventilation thin pipe is fixedly connected with a semispherical expansion opening plate through a connection rod. An emulsion sleeve is connected to the semispherical expansion opening plate and the supporting ventilation thin pipein a sleeving manner. The bottom of the emulsion sleeve is connected with the top surface of the round connection box in a glued manner. According to the device for removing the scale on the inner side wall of the direct drinking water faucet port, the inner side wall of the faucet port is extruded through a scale removal brush, the friction pressure between the scale removal brush and the innerside wall of the faucet is increased, and therefore the aim of conducting friction scrubbing on the inner side wall of the faucet port is achieved.

The invention discloses a spiral friction type anchor device for a fiber reinforced composite material rib pull cable. The spiral friction type anchor device comprises a cover plate A, a cover plate B, a post core and a pull cable fastener, wherein the cover plate A and the cover plate B are provided with spiral grooves, the post core is provided with a spiral groove, the cross section of the spiral grooves formed in the cover plates and the post core are respectively in semicircular shapes with the same diameter, the spiral grooves formed in the two cover plates and the post core are mutually matched for forming a space spiral groove with the round cross section, the cover plate A is respectively provided with an inlet hole and an output hole at the starting point and the terminal point of the spiral groove, an FRP (fiber reinforced plastic) rib pull cable with the same cross section diameter as the spiral grooves passes through the inlet hole of the cover plate A to be wound in the spiral groove of the core post and passes through the output hole of the cover plate A, the FPR rib pull cable is covered by a space rotating groove curve surface formed by the cover plates and the post core, and the tail end of the FRP rib pull cable is fixed by the pull cable fastener arranged on the cover plate A. The cover plate A, the cover plate B and the post core with the spiral groove are connected and fixed through positioning pins arranged at the two ends. The spiral friction type anchor device has the advantages that the structure is reasonable, the performance is reliable, and durability is realized.

The invention relates to the technical field of faucet assistant maintenance, and discloses a descaling device and method for the inner side wall of an end opening of a direct drinking faucet. The descaling device comprises a handle; the left end face of the handle is fixedly connected with a circular positioning block through bolts, the lower surface of the circular positioning block is fixedly connected with a micro motor through bolts, and an output shaft of the micro motor penetrates through the lower surface of the circular positioning block and is fixedly connected with a circular connecting box; a thin supporting ventilation pipe is welded to a ventilation opening in the middle of the top of the circular connecting box, and the side face of the tail end of the thin supporting ventilation pipe is fixedly connected with a hemispherical expansion plate through connecting rods; and the hemispherical expansion plate and the thin supporting ventilation pipe are in sleeved connection with a latex sleeve, and the bottom of the latex sleeve is bonded to the surface of the top of the circular connecting box. According to the descaling device for the inner side wall of the end openingof the direct drinking faucet, descaling brushes can press the inner side wall of the end opening of the faucet, frictional pressure between the descaling brushes and the inner side wall of the faucetis increased, and thus the purpose of frictionally brushing the inner side wall of the end opening of the faucet is achieved.

A fixed shaft type full-moving rudder surface mounting structure provided by the invention comprises a rotating shaft, a limiting bolt, a beam, a cushion block, a tightening nut and a rocker arm, andthe rotating shaft is inserted into a fuselage supporting structure and is fixed through the limiting bolt. The beam and the cushion block are sleeved on the rotating shaft and are locked by the tightening nut combined with the rotating shaft, the rocker arm is fixedly connected with the beam through bolts, and a steering engine controls the rocker arm to drive the beam to rotate around the rotating shaft. The fixed shaft type full-moving rudder surface mounting structure has the characteristics of only one key mounting procedure, simple limiting structure and limiting mode, clear limiting effect of each fulcrum, no over-constraint, effectiveness in guaranteeing that the installation position of the full-moving rudder surface is within the reasonable tolerance range relative to the theoretical position of the full-moving rudder surface, stable rudder surface control gap, no increase of the rotating friction force of the rudder surface, and facilitation of improvement of the service life of related structural parts, the airplane flutter speed and the flight quality.

The invention relates to the technical field of mechanical assembly, in particular to a power-assisted assembly clamping jaw adapting to different types of large and heavy parts. The power-assisted assembly clamping jaw comprises a supporting column, a rotating mechanism, a clamping mechanism, a swinging mechanism, a locking mechanism and a rotating speed reducing mechanism, and the rotating mechanism, the locking mechanism and the rotating speed reducing mechanism are all arranged at the end of the supporting column; the rotating mechanism is provided with a rotating sleeve, the rotating speed of the rotating sleeve is reduced through the rotating speed reducing mechanism when the rotating sleeve rotates, the rotating sleeve is locked through the locking mechanism after rotating in place, the swinging mechanism comprises a supporting frame, a hand wheel shaft and a nut, and the clamping mechanism is provided with a clamping mounting frame; and the supporting frame is fixedly mounted on the rotating sleeve, the lower end of the supporting frame is hinged to the lower end of the clamping mounting frame, the nut is mounted at the upper end of the supporting frame in a hinged mode, and the hand wheel shaft penetrates through the nut and then is rotationally connected with the upper end of the clamping mounting frame. The position of a workpiece can be conveniently adjusted while the workpiece is clamped and assembled, the assembling flexibility is improved, the assembling requirement can be met, and the assembling efficiency is improved.

The invention provides a camera fixing bracket which is simple to install and convenient to disassemble and repair. The camera fixing bracket includes a mounting seat and a connecting rod, one end ofthe connecting rod is connected to the mounting seat through a ball joint, the other end of the connecting rod is provided with a thread connecting rod, the diameter of the thread connecting rod is less than the diameter of the connecting rod, the connecting portion of the connecting rod and the threaded connecting rod forms an annular shoulder, and the annular shoulder is provided with an elasticcushion. When the bracket is used, a camera is installed by using the threaded connecting rod, when the camera is screwed tightly until the back of the camera is to be pressed against the annular shoulder, the camera contacts and presses the elastic cushion, the elastic cushion applies force to the back of the camera, the camera is automatically clamped so that the camera can be quickly connectedto the connecting rod, when the repair is required, the camera can be removed by rotating the camera in the opposite direction without removing the entire fixing bracket, and the repairing process isquicker and more convenient.

The invention provides a coiled material packaging machine which comprises an unwinding device and a crimping device. The unwinding device comprises a sliding base and an unwinding roller, an unwinding support is arranged below the unwinding roller and movably connected with the sliding base through sliding wheels, and a transition roller a and a computer deviation rectification device are arranged between the unwinding device and the crimping device. The crimping device comprises a crimping rack which is provided with a transition roller b, a wind-up roller, a crimping carrier roller and a crimping rubber carrier roller, and a rotating shaft of the wind-up roller, a rotating shaft of the crimping carrier roller and a rotating shaft of the crimping rubber carrier roller are connected in a tangent mode. The crimping rubber carrier roller is connected with a rotating shaft of a crimping motor through a transmission chain in a rotating mode. The packaging machine is widely used for full-automatic packaging of various coiled materials, the occurrence rate of the situation that crimped single edges are uneven and loosened crimping exists is reduced, and the packaging speed and packaging quality are effectively improved.

The invention relates to the technical field of multi-shaft machining centers, and discloses a main shaft automatic lubricating device capable of avoiding increase of rotating friction. The main shaft automatic lubricating device comprises a machine frame, an inner rack is fixedly connected to the side wall in the machine frame, a rotating shaft is rotatably connected to the center in the machine frame, and a rotating disc is fixedly connected to the end part of the rotating shaft. A sliding groove is formed in the rotating disc, a sliding block is slidably connected into the sliding groove, a ratchet bar is fixedly connected to the end of the sliding block, a sliding plate is slidably connected into the rotating disc, a metal strip is fixedly connected into the sliding plate, and a metal feeler lever is fixedly connected to the side face, close to the sliding plate, of the rotating disc. When the rotating speed of a main shaft is lower than the normal rotating speed range, the metal feeler lever makes contact with the metal strip under the action of centrifugal force, the interior of the main shaft starts to be lubricated, and therefore the effects that the main shaft can be automatically lubricated according to the working state of the main shaft, the working time is saved, and the working efficiency is improved are achieved.

The invention discloses a soil sampling device for constructional engineering, and the device comprises a protection box, a positioning box, a sampling pipe, a lubricating mechanism, a dismounting mechanism and a damping mechanism; a motor is fixedly mounted in an inner cavity of the protection box, a driving shaft is arranged at one end of the motor, the driving shaft penetrates through the surface of the bottom end of the protection box, and the lubricating mechanism comprises a sleeve. According to the invention, through the arrangement of the sleeve, the long-time rotation friction force increase of the driving shaft on the motor at the bottom end of the protection box is effectively avoided, so a certain lubricating effect is achieved, the rotating efficiency of the driving shaft is improved, and the working efficiency of the device is further improved; through the arrangement of the pull handle, the problem that when the sampling pipe is damaged after long-time use and needs to be replaced, the dismounting process is tedious is effectively avoided, manpower is saved, the dismounting efficiency of the device is improved; through the arranged rubber columns, the situation thatvibration of the device cannot be buffered during working is effectively avoided, the stability of the device is improved, and the positioning accuracy of the device is guaranteed.

The invention discloses an industrial automation control system comprehensive practical training examination device, and particularly relates to the technical field of industrial automation control, the industrial automation control system comprehensive practical training examination device comprises a workbench, and the top of the workbench is provided with a camera assembly; the camera shooting assembly comprises a shell, a camera is arranged in the shell, a micro motor for driving the camera to rotate is fixedly arranged in the shell, an open groove is formed in the side, facing the workbench, of the shell, an adsorption layer is fixedly arranged on the inner wall in the shell, and a lifting plate is fixedly arranged at the bottom of the shell. The lifting plate is movably arranged on the workbench, a friction assembly for limiting the lifting plate is arranged on the workbench, and a touch screen connected with the output end of the camera is arranged on the workbench. The current assessment process of the user can be recorded and stored through the camera assembly and the camera, and after the assessment of the user is completed, the assessment process can be played back through the touch screen, so that the user can find out own defects conveniently, and the practicability is high.

An anti-stall device for a coating stirring device relates to the technical field of coatings and comprises a rotating shaft, first springs are fixedly connected to the inner walls of the two sides of the rotating shaft, centrifugal blocks are fixedly connected to the outer sides of the first springs, dielectric plates are fixedly connected to the inner walls of the centrifugal blocks, positive plates are fixedly connected to the inner wall of the rotating shaft and close to the tops of the centrifugal blocks, negative plates are fixedly connected to the inner wall of the rotating shaft and close to the bottoms of the centrifugal blocks, and resistors are fixedly connected to the inner side of the rotating shaft and close to the outer sides of the centrifugal blocks. According to the anti-stall device for the coating stirring device, through cooperative use of a first electromagnet, a second electromagnet and a wire, when the rotating speed of the stirring device is too high, the first electromagnet and the second electromagnet are both in a powered-on state, the wire is also in the powered-on state, the powered-on wire can move in a magnetic induction line and cut the magnetic induction line, and therefore the wire can generate Ampere force, rotation of the rotating shaft is effectively hindered, so that the anti-stall effect is achieved, and the practicability is improved.

The invention relates to the technical field of earphones and particularly relates to a headset type earphone and a rotating mechanism thereof. The rotating mechanism is applied in the headset type earphone and comprises a headband and earphone units connected at the two ends of the headband, wherein the rotating mechanism comprises a fixed seat, a rotating seat and an elastic part; the fixed seat is fixedly arranged on the headband; the rotating seat is hinged at the fixed seat by a pin and is fixedly connected with the earphone units so as to drive the earphone unit to rotate around the pin; the elastic part is sheathed outside the pin so as to apply pressure on the rotating seat and the fixed seat. The rotating mechanism has the advantages that the friction force between the rotating seat and the fixed seat is increased when the rotating seat is rotated, so that the resistance to the rotating seat in rotation is increased, the handfeel in adjustment of the rotating seat can be further and obviously improved, and the use effect is better.

The invention relates to the technical field of water faucet auxiliary maintenance, and discloses a device for removing scale on the inner side wall of a direct drinking water faucet port. The devicecomprises a handle. The left end face of the handle is fixedly connected with a positioning round block through bolts. The lower surface of the positioning round block is fixedly connected with a micro motor through bolts. An output shaft of the micro motor penetrates the lower surface of the positioning round block and is fixedly connected with a round connection box. A supporting ventilation thin pipe is welded to the position of a ventilation opening in the middle position of the top of the round connection box. The side face of the tail end of the supporting ventilation thin pipe is fixedly connected with a semispherical expansion opening plate through a connection rod. An emulsion sleeve is connected to the semispherical expansion opening plate and the supporting ventilation thin pipein a sleeving manner. The bottom of the emulsion sleeve is connected with the top surface of the round connection box in a glued manner. According to the device for removing the scale on the inner side wall of the direct drinking water faucet port, the inner side wall of the faucet port is extruded through a scale removal brush, the friction pressure between the scale removal brush and the innerside wall of the faucet is increased, and therefore the aim of conducting friction scrubbing on the inner side wall of the faucet port is achieved.