63results about How to "Won't pierce" patented technology

A guidewire for medical use such as in vascular and nonvascular systems. The guidewire made from a titanium molybdenum alloy wire with a composition of approximately 78% titanium 11.5% molybdenum 6% zirconium and 4.5% tin by weight such that it is softer than stainless steel guidewires and stiffer than NiTi alloy guidewires. The distal end of the guidewire is of a smaller diameter and softer than the proximal end and fitted with a coil for springiness such that the distal end will bend when encountering curves in the body passageways. The distal tip may be heat treated for a gradient of softness with the distal tip being the softest. The distal end may also be tapered to provide an additional gradient of softness. A distal tip on the distal end of the guidewire protects the wall of the passageway from being punctured as the guidewire travels through the passageway. The resulting guidewire has properties between those of stainless steel guidewires and NiTi alloy guidewires for better torsion and stiffness characteristics.

The invention discloses a medical auxiliary instrument. The medical auxiliary instrument comprises a mounting cross beam, supporting rods and L-shaped hooks, wherein one group of supporting rods are symmetrically arranged, an electric telescopic rod is arranged at the bottom of each supporting rod, a vacuum chuck is arranged at the bottom of each electric telescopic rod, the mounting cross beam isarranged above the supporting rods, a pneumatic cylinder is arranged at a middle position of the bottom of the mounting cross beam, an arm placing position is arranged at the output end of the pneumatic cylinder, a threaded hole is formed in each electric telescopic rod, a screw is arranged on each threaded hole, the L-shaped hook is arranged on each screw, an aerator is arranged on each screw, alocating bolt is arranged at the top of one end, close to the L-shaped hook, on each screw, each locating bolt runs through the corresponding screw and extends to the underneath of the screw, a mounting block is arranged on each locating bolt, and an air sac is arranged at the bottom of each mounting block. The medical auxiliary instrument disclosed by the invention has good fixation effect in surgery, and working strength of medical personnel is greatly alleviated.

The invention relates to a one-way thrombus removal device, and belongs to the field of medical instruments and apparatus. The one-way thrombus removal device is suitable for removing foreign matterssuch as thrombi in blood vessels, thrombus fragments, blood coagula, blood lipid plaques and atherosclerosis substances, and is also suitable for removing blood thrombi which are formed on the inner surface of an intravascular stent in the human blood vessel and caused endothelial hyperplasia. The one-way thrombus removal device comprises a puncture head, a guiding wire, a catheter, a front balloon, a front balloon liquid guiding tube, a front supporting sleeve, a collection net, a thrombectomy device, a rear balloon, a rear balloon liquid guiding tube, a rear supporting sleeve, a cannula anda negative pressure suction tube; the cannula sleeves the exterior of the catheter, the front balloon is mounted in a front balloon mounting groove, the front balloon liquid guiding tube is connectedwith the front balloon, and the thrombectomy device is arranged on the portion, behind the front balloon mounting groove, of the catheter; the collection net is mounted on the portion, behind the thrombectomy device, of the catheter; a rear balloon mounting groove is formed in the portion, behind the collection net, of the catheter, and the rear balloon is mounted in the rear balloon mounting groove; the negative pressure suction tube is mounted at the position, where the rear supporting sleeve is mounted, in the catheter.

The invention relates to an apparatus for collecting early-stage embryo or early-stage oocyte of a pig and a collecting method. The apparatus comprises an ovum collecting apparatus and an ovum collecting pipe, wherein the ovum collecting apparatus is a soft colloid pipe with the length of 200-300mm, the outer diameter of 1.0-1.1mm and the pipe wall thickness of 0.08-0.1mm, one end of the soft pipe is a No.9-12 pinhead and the other end is connected with a syringe; and the ovum collecting pipe has the length of 130-140mm, the wall thickness of 0.8-1.1mm and the inner diameter of 3-4mm with an angle of 120-140 degrees bending in the middle. When collecting early-stage embryo or early-stage oocyte of a pig, firstly, one end of the ovum collecting pipe is inserted into the fallopian tube for 10-15mm from fimbriae opening of the fallopian tube, and the other end is connected with an ovum collecting container; then the syringe sucked with 15-20ml of ovum collecting solution and 5-10ml of air is connected with the ovum collecting apparatus, the pinhead of the ovum collecting apparatus is inserted into the fallopian tube for 5-8mm from the uterine horn end of the junction of the uterine and the pipe, and then ovum collection is carried out. The invention obviously improves the success ratio and the efficiency of the collection.

The invention relates to a thrombus removal device of a thrombus removal system. The thrombus removal device is used in cooperation with the thrombus removal system and is suitable for removing thrombi, thrombus debris, blood clots, blood lipid plaques, atherosclerosis matter and other foreign bodies in the blood vessels and removing blood vessel thrombi formed on the inner surfaces of blood vessel stents placed in the blood vessels and caused hyperplasia of the blood vessel endothelia. The thrombus removal device of the thrombus removal system comprises a puncture head, a guide wire, a frontcatheter, a middle catheter, a front cannula, a front balloon, a front balloon liquid catheter, a front support sleeve, a front collection basket, a front thrombectomy device, a front catheter and middle catheter telescopic connection mechanism, a middle catheter and rear catheter telescopic connection tube, a rear catheter, a rear catheter cannula, a rear balloon, a rear balloon liquid catheter,a rear support sleeve, a rear collection basket, a rear thrombectomy device and a negative-pressure suction tube; the middle catheter at the rear portion of the front collection basket is provided with the front thrombectomy device; the rear catheter at the front portion of the rear collection basket is provided with the rear thrombectomy device.

The invention discloses a method for recovering copper from an acidic etching waste liquid, which comprises the following steps: by using the acidic etching waste liquid emitted by a PCB (printed circuit board) etching process as a catholyte and anolyte, sequentially adding an accelerator, a grain refiner and a leveling agent into the catholyte, and carrying out direct-current electrolysis at the cathode current density of 100-1000A / m<2> for 10-30 hours, thereby obtaining the metal copper in the cathode chamber, wherein the accelerator is an ammonia derivative, the grain refiner is a sulfonic organic sulfide, and the leveling agent is polyvinyl alcohol. The method can be used for directly obtaining a copper block, and the deposited copper block has the advantages of high purity, easy stripping and no branch and can not penetrate through the diaphragm.

The invention provides a pain measurement device, and belongs to the field of medical facilities. The pain measurement device comprises a protruding structure and a stopping structure; the protruding structure outwards protrudes and is used for enabling pains to be generated in the skin; the stopping structure is located below the protruding structure and used for supporting the skin around an extrusion area when the protruding structure extrudes the skin. By means of the pain measurement device, the pain measurement degree of a doctor can be stably controlled, and therefore the pain measurement results are more accurate; meanwhile, the skin cannot be punctured, and pains and cross infections of a patient during pain measurement are reduced. The pain measurement device is simplified in structure and favorable for clinic operation of the doctor.

The invention relates to the field of machining, in particular to a machining method of a motorcycle accessory. The machining method comprises the following steps that spool films are arranged on a bracket in a sleeving manner; two telescopic shafts are retracted to enable the spool films on the bracket to be located on the left side and the right side of the free end of a supporting barrel; an air cylinder stretches, and an output shaft of the air cylinder pushes each negative pressure barrel to rotate around an articulating point of the corresponding negative pressure barrel and the supporting barrel, so that suction ports in the negative pressure barrels are turned to the spool films close to the suction ports correspondingly; the negative pressure barrels are started, and the suction ports suck the free ends of the spool films by the action of negative pressure; the telescopic shafts are stretched, one end of each of the two spool films are sucked and fixed by the negative pressure barrels, and the other ends of the two spool films carry out film pasting in the free end directions of a transverse plate and a vertical plate of a nut plate separately till the bracket moves to a cutter, and the cutter cuts off the films connected on the bracket; and the negative pressure barrels stop sucking, and the telescopic shafts are retracted, so that film pasting is completed. With the implementation of the scheme, the problems that the films are prone to puncture and the labor intensity is high when a workpiece in a sharp corner shape is subjected to the film pasting in the prior art are solved.

The invention belongs to the technical field of nuclear medicine. The invention discloses a container and a method for closed operation of radionuclide. According to the container, an upper containerand a lower container are arranged, and a channel moving part and a puncture needle are arranged; relative axial movement can be generated through the puncture needle and a bottle body which is placedin the lower container and is filled with radionuclide; the puncture needle punctures a bottle cap of the bottle body, the radionuclide in the bottle body is sucked or recycled by inserting a drainage tube, the bottle body filled with the radionuclide does not need to be taken out during use, operation is convenient, and meanwhile the risk that the radionuclide in the bottle body leaks or is polluted is avoided.

The invention discloses a dust removal filtering cloth bag rapid to install. The dust removal filtering cloth bag comprises a filtering cloth bag body. An installation ring is sewn on the outer wall of the top end of the filtering cloth bag body. A limiting column is welded to the outer wall of the top of the installation ring. A fastening ring is arranged on the outer wall of the installation ring. A fixed base is clamped on the outer wall of the top of the installation ring through the limiting column. A push rod motor is fixed to the outer wall of the top of the fixed base through a bolt. Aconnecting shaft is connected with one end of a piston rod of the push rod motor. Hydraulic rods are fixed to the outer walls of the four sides of the connecting shaft through bolts respectively. Anarc-shaped lining plate is fixed to one end of a piston rod of each hydraulic rod through a bolt. A screw hole is formed in the outer wall of the bottom of the connecting shaft. A lengthening frame isin threaded connection with the inner wall of the screw hole. The limiting column with the top end fixed is fixed to the fixed base for supporting open a machine during installation, the limiting column has another effect of fixing the J-shaped lining plates, the J-shaped lining plates are pressed to reset through fixing screw clamps, the J-shaped lining plates support open the inner wall of thefiltering cloth bag body, and the installation process is simplified.

The invention is a method for preventing short circuiting in a lithium ion battery. The battery has an anode made of intercalation compound, a cathode made of an intercalation compound, and a separator having a thickness of 25 microns or less sandwiched between the anode and the cathode. The method includes the steps of rounding or beveling the edge portion of the cathode, so that during charging when the anode and cathode expand and squeeze the separator, the rounded or beveled edge portion of the cathode cannot cut the separator.

The invention discloses a waterproof and moistureproof structure of an LED underground lamp, which includes an LED underground lamp body with a radiator in a pit and a plastic pre-embedded part. Tempered glass is arranged on one face, facing upwards, of the LED underground lamp, a boss is arranged on the bottom surface of the radiator of the LED underground lamp, the boss is provided with a through-hole communicating with an internal cavity of the radiator of the LED underground lamp, the boss is provided with an aluminum alloy waterproof breather valve for maintaining the air pressure balance in the cavity of the LED underground lamp, a silicone hose sleeves the lower end of the boss, and the silicone hose communicates with a silicone telescopic air bag through a direct connection air pipe connecting head. According to the structure, the air pressure balance in the cavity of the LED underground lamp is maintained, meanwhile, the aluminum alloy waterproof breather valve is prevented from being damaged to fail to work when the LED underground lamp is immersed in water, and thus the long-term waterproof and moistureproof effects are achieved. The invention further discloses an installation method of the waterproof and moistureproof structure of the LED underground lamp. The method can ensure that the waterproof and moistureproof properties of the LED underground lamp in the severe environment cannot fail.

The invention belongs to the technical field of edible fungus cultivation, and relates to a preparation method of an edible fungus cultivation medium containing compressed straw. The method comprisesthe following steps of crushing straws and compressing into solid bulks with the density of 1300-2000 Kg / m3 and water weight percentage content of 8-35%; and enabling the solid bulks to be mixed withwater at the weight ratio of (1:1) to 2, and adding lime which accounts for 0.3-1.0% of the weight of the solid bulks, performing water absorbing and scattering, then adding other edible fungus cultivation auxiliary materials, and performing mixing and stirring to obtain the edible fungus cultivation medium. The edible fungus cultivation medium provided by the invention has relatively high density, the yield of edible fungi in the unit volume cultivation matrix is increased, the production efficiency is improved, and the production cost is lowered.

The invention discloses a paper cutting device for rolled-up sketching paper / vegetable parchment. The paper cutting device is mainly characterized in that a fan-shaped shaft seat plate is arranged at the right end of a handle; a hollow shaft for being sleeved with and inserted in cylinder core inner holes of rolled-up sketching paper / vegetable parchment is arranged on the inner end face of the fan-shaped shaft seat plate; the axis of the hollow shaft, the left horizontal central axis of a semicircular inner hole of the handle and the right horizontal central axis of the semicircular inner hole of the handle coincide together; an external thread connected with a butterfly nut is arranged at the left end of the hollow shaft; a horizontal boss protruding forwards is arranged at the front end of the handle in the left-right direction; a lug base is arranged at the left end of the horizontal boss, and a lug base is arranged at the right end of the horizontal boss; a pull rod is arranged between the lug bases at the left end and the right end; the pull rod is fastened on the lug bases at the left end and the right end through nuts; a cutter used for cutting off sketching paper / vegetable parchment is arranged on the front end inclined face of the horizontal boss; and zigzag sharp edges evenly distributed are arranged on the lower portion of the cutter in the left-right length direction. The paper cutting device can rapidly cut off sketching paper / vegetable parchment, and is convenient to use. The work efficiency is remarkably improved.

The invention relates to a thrombus removing system which is suitable for removal of foreign matters such as thrombi, thrombus fragments, blood clots, blood lipid plaques and atherosclerotic substances in blood vessels and is also suitable for removing blood vessel thrombi formed on the inner surfaces of blood vessel stents placed in blood vessels of a human body and causing vascular endothelial hyperplasia. The thrombus removing system comprises a thrombus removal device and an operating handle portion, wherein the thrombus removal device is connected with the operation handle portion througha rear catheter; the thrombus removal device comprises a puncture head, a guide wire, a front catheter, a middle catheter, a front cannula, a front balloon, a front balloon catheter, a front supportsleeve, a front collection basket, a front thrombectomy device, a front catheter and middle catheter telescopic connection mechanism, a middle catheter and rear catheter telescopic connection tube, arear catheter, a rear catheter cannula, a rear balloon, a rear balloon catheter, a rear support sleeve, a rear collection basket, a rear thrombectomy device and a negative-pressure suction tube; the front thrombectomy device is arranged on the middle catheter at the rear portion of the front collecting basket; the rear thrombectomy device is disposed on the rear catheter in front of the rear collection basket.

The invention discloses a detachable tent support which comprises a top support and a side face support. The cross section of the top support is in an arch shape. The top support comprises a lower supporting frame, an upper supporting frame, an arc side supporting frame and a connecting rod. The lower supporting frame, the upper supporting frame and the side supporting frame are in buckled transition connection with the connecting rod to form a whole. The side face support is of a stretchable support structure connected through a connecting piece. Universal castors are arranged at the lower portion of the side face support. The side face support and the side supporting frame of the top support are in buckled connection. The detachable tent support is good in disassembly and assembly performance, convenient to move outdoors and long in service life, and an awning cloth is solid and durable.

The invention relates to a press-typed self-heating container of a water cup, and belongs to the technical field of self-heating devices. The press-typed self-heating container comprises a pot, and a pot to be heated is arranged in the pot, the bottom inside the pot body is provided with a self-heating bag, a plate is arranged on the self-heating bag, and the upper surface of the plate is provided with a thin film piercing piece and a spring. The upper end of the spring is provided with an inverted water cup, the bottom of the water cup is opposite to the bottom of the pot to be heated, and an opening of the water cup is sealed with a thin film. By means of the press-typed self-heating container of the water cup, the water cup can be pierced easily and quickly, and the water cup does not need to be taken out from a heating device for tearing up the thin film. The press-typed self-heating container of the water cup is higher in safety factor and better in practical effect due to a spring limiting structure, the elastic factor of the spring is reasonably selected and used so that the thin film cannot be pierced even the water cup is not used, and a user needs to compress the spring and then pierce the thin film arranged at the opening of the water cup in a sealed mode.

The invention discloses a pole piece surface treatment method, a pole piece surface treatment device and a piece manufacturing machine comprising the pole piece surface treatment device. The pole piece surface treatment device comprises a grinding plate, a working zone, a first hairbrush, a grinding roller and a power source, wherein the grinding plate is used for fixing a pole piece; the working zone is used for surface treatment; the first hairbrush is used for sweeping the pole piece; the grinding roller is used for grinding the pole piece; the power source is used for driving the grinding roller; the first hairbrush is arranged on the inlet side of the working zone; and the grinding roller is arranged on the rear side of the first hairbrush along the motion direction of the pole piece. By usingthe pole piece surface treatment device adoptingthe pole piece surface treatment method provided by the invention, the height of burrs can be reduced, the dust on the surface of the pole piece is reduced, the surface quality of the pole piece is improved, and a diaphragm is prevented from being punctured when a battery is produced by utilizing the pole piece. The pole piece produced by utilizing the piece manufacturing machine is high in quality.

The invention discloses a method for recovering copper from an acidic etching waste liquid, which comprises the following steps: by using the acidic etching waste liquid emitted by a PCB (printed circuit board) etching process as a catholyte and anolyte, sequentially adding an accelerator, a grain refiner and a leveling agent into the catholyte, and carrying out direct-current electrolysis at the cathode current density of 100-1000A / m<2> for 10-30 hours, thereby obtaining the metal copper in the cathode chamber, wherein the accelerator is an ammonia derivative, the grain refiner is a sulfonic organic sulfide, and the leveling agent is polyvinyl alcohol. The method can be used for directly obtaining a copper block, and the deposited copper block has the advantages of high purity, easy stripping and no branch and can not penetrate through the diaphragm.

The invention relates to the field of panels, and particularly relates to a carbon fiber panel. The carbon fiber panel comprises a polyurethane surface layer, a carbon fiber tensile layer, a carbon fiber reinforcing layer and a substrate layer sequentially from outside to inside. Carbon fibers are very high in acceptable daily intake of harmful gases of formaldehyde and benzenes, and the panel has an environment protection function after the carbon fibers are added; and the middle of the carbon fibers is reinforced by using a fine steel mesh so that the strength is increased, and thus the fine steel mesh can be used for preventing the panel from being punctured. The carbon fiber panel remains the natural attractiveness and texture of wood, and is low in cost, easy to available, high in utilization rate, and environment-friendly without pollution.

The invention relates to the field of boards, in particular to a composite board which comprises a durable layer, a carbon fiber layer, a resin layer, a photocatalyst coating and a base layer. The base layer, the photocatalyst coating, the resin layer, the carbon fiber layer and the durable layer are sequentially arranged from inside to outside. The durable layer is made of non-toughened glass or marble. The base layer is preferably made of aluminum metal materials. The middle of the carbon fiber layer is reinforced by a thin steel mesh.

The invention provides a greenhouse top film cleaning machine. A support and a cleaning device arranged on the support are included. The support comprises two moving lifting systems arranged on the two sides of a greenhouse correspondingly and a supporting frame erected at the top ends of the two moving lifting systems. The cleaning device is arranged on the supporting frame and comprises a plurality of sets of sweeping mechanisms, spraying mechanisms and cleaning mechanisms which are sequentially arranged in the moving direction from front to back. The sweeping mechanisms are used for blowingoff sand grains and other particles on a top film of the greenhouse. The spraying mechanisms spray high-pressure mist to the top film of the greenhouse. The cleaning mechanisms are used for cleaningthe top film of the greenhouse.

The invention discloses a glove. The glove comprises a glove body. The glove body from inside out successively comprises a non-woven fabric layer, a heat insulation layer, a metal net layer, and an insulating layer. The upper surface of the insulating layer is provided with a plurality of semicircular bumps, arc magnets are uniformly arranged at fingertip positions of the insulating layer; a first steel sleeve, a second steel sleeve and a third steel sleeve are concentrically sleeved on each finger segment between the non-woven fabric layer and the heat insulation layer, wherein the first steel sleeve, the second steel sleeve and the third steel sleeve are positioned at a proximal segment, a middle segment, and a distal segment of the finger respectively; the outer surface of the glove body is coated with a fireproof adhesive. The glove has a simple structure, good insulating and heat insulation performance and good fireproof performance, can prevent fingers from being squeezed, and cannot be pierced by a sharp tool, and the arc magnets on the glove body can be used for attracting some iron products which fall into gaps.

The invention belongs to the technical field of food processing, and particularly relates to stuffing food forming equipment capable of corrugating the outer surface of a wrapper of stuffing food. The stuffing food forming equipment comprises a flour supply mechanism, a stuffing injection mechanism, a forming mechanism and a material discharging mechanism, wherein the flour supply mechanism, the stuffing injection mechanism, the forming mechanism and the material discharging mechanism are distributed around an annular station disk in sequence; the annular station disk is provided with a forming die capable of doing circumferential circumference around the annular station disk; the forming die comprises a wrapper catching plate and die cups; forming holes are formed in the wrapper catching plate; the die cups penetrate through the forming holes; step structures are arranged on the inner side walls of the upper parts of the die cups; multiple strip-type bulges are further uniformly distributed below the steps on the inner side walls of the die cups; and a strip-type groove is formed between every two adjacent strip-type bulges. According to the stuffing food forming equipment, by the formation of the multiple regular strip-type grooves in the inner sides of the die cups, the strip-type grooves are matched with convex strips on a wrapper stabbing head, so that wrappers can be clamped between the strip-type grooves and the convex strips, and regular folds and patterns are formed on the inner surfaces and the outer surfaces of the wrappers.

The invention relates to a medical instrument, and particularly discloses a cyst fluid puncture aspirator for a patient. The puncture device comprises a puncture tube, the diameter of the head end of the puncture tube is changed into a rectangular pyramid table tube, a liquid suction hole is formed in the portion, behind the rectangular pyramid table tube, of the puncture tube, a puncture suction head is installed at the end of the rectangular pyramid table tube, the puncture suction head is hinged to the upper end of an inclined face through a hinge shaft, and the puncture suction head is a rectangular pyramid hollow body. The lower end part of the hollow body is positioned in the rectangular pyramid table pipe; when the puncture suction head rotates under the action of external force, the whole puncture suction head can rotate into the rectangular pyramid frustum tube. The puncture suction head is provided with the tip and can rotate, and after penetrating through the cyst, the puncture suction head rotates into the rectangular pyramid table pipe under the action of airflow formed by liquid in the cyst and under the pulling of the pull rope, so that the tip cannot puncture blood vessels and nerves in the cyst, secondary injury to a patient cannot be caused, and the puncture suction head is safe and efficient.

The invention discloses a medical eye patch used for infants and children. The medical eye patch comprises an anti-sticking layer (1), a micro-needle array layer (2), an eye medicine storage layer (3)and a sticking layer (4). The invention also discloses a preparation method and a purpose of the medical eye patch. The medical eye patch is simple in use and preparation, and does not hurt the eyesof infants and children.

A hot-pressing covering machine for facing wood lines comprises a frame, an upper mould and a lower mould, wherein the upper mould and the lower mould are oppositely arranged on the frame. The hot-pressing covering machine is characterized in that side moulds capable of reciprocating towards a molding cavity are arranged on two sides of the molding cavity between the upper mould and the lower mould respectively, a concave elastic lining is arranged in the molding cavity, and two transverse sides of the concave elastic lining are lapped on the left side mould and the right side mould respectively. After the left side mould and the right side mould are additionally arranged on the two sides of the molding cavity, a molded part is hot-pressed at one step by means of sequentially closing the upper mould, the left side mould and the right side mould, particularly, a blank is hot-pressed in the molding cavity by the aid of the concave elastic lining, and a facing sheet cannot crease or crack or be pierced.

The invention provides a lithium-iron battery positive tab and a lithium-iron battery, which relate to the technical field of batteries. The positive tab is in the shape of a long sheet, including a first tab, a second tab and a Three tabs, the material of the first tab is aluminum, the material of the second tab is aluminum-nickel composite material, and the material of the third tab is nickel or copper-nickel composite material. The material of the positive tab is relatively hard, with high internal resistance and high heat generation. Under the action of external forces such as extrusion, acupuncture and impact, it is easy to cause the battery to burn or explode, leading to technical problems of safety accidents. The material of the positive tab of the lithium-iron battery provided by the invention is relatively soft, and the internal resistance is small, which not only improves the discharge performance of the lithium-iron battery, but also does not pierce the diaphragm under the action of external forces such as extrusion, impact and acupuncture. , has improved the safety performance of lithium-iron batteries.

This is an ear cleaner, which is related to acoustic meatus clean. This invention overcomes the limitation of rigid spoon-type metallic substance in cleaning cerumen. Because spoon-type metallic substance is made of metal, it is very rigid and will scratch antrum auris and tear tympanic membrane if force controlled bad when using, also it may pug cerumen to the deep of acoustic meatus and makes the cerumen can not be cleaned absolutely. This invention is fitted by length suitable, soft and fine wire-strip; it breaks the cerumen into pieces by rotating the wire-strip. It will not scratch antrum auris and tear tympanic membrane during cleaning cerumen, in reverse, when breaking the cerumen emit kaka sound, and it is very comfortable.