145results about How to "Good waterproof sealing" patented technology

The invention provides a mobile terminal. The mobile terminal provided by the invention comprises a shell; a pickup hole is formed in the shell; a microphone, a circuit board, a waterproof membrane bracket, a waterproof membrane and a sound receiving bracket are arranged in the inner cavity of the shell; the waterproof membrane is stuck on the waterproof membrane bracket and is supported against the pickup hole which is located at the inner sidewall of the shell; the microphone is arranged on the circuit board; a sound receiving through hole which is opposite to the waterproof membrane is formed in the waterproof membrane bracket; the sound receiving bracket is connected with the shell; the sound receiving bracket is provided with a through hole; one end of the through hole is opposite to the sound receiving through hole of the waterproof membrane bracket while the other end thereof is opposite to the receiving end of the microphone, so that a sound conduction channel is formed between the pickup hole and the receiving end of the microphone; and the circuit board is electrically connected with the microphone to drive the microphone to receive sound. According to the mobile terminal, a microphone sealing and waterproof structure with good sealing and high reliability can be realized.

The invention relates to Piezocone penetration test (CPTU) equipment, in particular relating to CPTU prober of a dual-deformed column. The CPTU prober is characterized by comprising a second deformed column, a friction drum, a first deformed column, a pore water pressure sensor, a permeable filter, a conical head, a first strain gauge and a second strain gauge, wherein the left end of the first deformed column is in threaded connection with the right end of the conical head and the right end of the first deformed column is in threaded connection with the left end of the prober rod; the friction drum is arranged outside the first deformed column; the friction drum and the first deformed column form a closed first chamber and a closed second chamber; the first strain gauge is adhered to the first deformed column; and the second deformed column is positioned in the second chamber, the second strain gauge is adhered to the second deformed column, and the port of a permeable channel on the right end face of the conical head is in threaded connection with the pore water pressure sensor. The CPTU prober is simple and compact in structure, high in measurement accuracy and good in sealability, and can be used for measuring the resistance of the conical head and the frictional force of side walls independently so as to eliminate mutual influence.

The invention discloses an LED lamp capable of dissipating heat automatically and a driving circuit of the LED lamp. The LED lamp comprises LED beads, an LED light source plate, an aluminum substrate and a base. A temperature detection device is arranged in the center of the bottom of the base. A light-transmitting plate, a light guide plate, the LED light source plate, the aluminum substrate and a heat dissipation plate are sequentially arranged on the inner side of an outer cover at the bottom of the base from bottom to top. The LED lamp is good in waterproof and sealing performance and stable in structure, two heat dissipation cavities are formed to be matched with a wall, the weight of the LED lamp is reduced, material consumption is reduced, the intelligent heat dissipation effect is improved, and the service life of the LED lamp is prolonged; and meanwhile, the driving circuit is optimized, the input LED driving circuit which is simple in structure and low in cost is formed through the voltage provided by an intrinsic reference voltage source of a chip U1 and the TL431, a switching tube with comparatively low withstand voltage can be selected, safety is guaranteed, the cost is reduced, losses and consumption are reduced, and the stability is high.

The invention discloses a water-proof radiating crosslinking polyethylene heat-condensing clad piece of oil, chemical and insulating pipe, which is composed of polyethylene base and fusing gel layer, wherein the polyethylene, carbon black and chlorcosane are fused and crosslinked to mould, which are extended transversely through nuclear radiation; the fused gel is coated on the inner surface or inner periphery of base evenly; each hole is opened on the clad piece along two sides intervally, which fixes the interface of clad piece.

The invention provides an ice expansion resistant device for a water conservancy project. The ice expansion resistant device for the water conservancy project comprises a fixed frame, a movable hot plate and a balance weight arranged at the bottom of the fixed frame, wherein the movable hot plate is connected with the fixed frame through a damper, a sealed pressure reducing cavity is formed between the movable hot plate and the fixed frame, the movable hot plate is pushed by external ice expansion pressure to move in the fixed frame along the damper so that the size of the pressure reducing cavity can be changed, heating wires are evenly distributed in side face plates of the fixed frame, and heating wires are evenly distributed in the movable hot plate. The ice expansion resistant device for the water conservancy project further comprises a temperature controller, a displacement sensor arranged on the movable hot plate, and side plate temperature sensors arranged on the side face plates of the fixed frame respectively. The ice expansion resistant device for the water conservancy project is novel in structure, various freezing resistant measures are combined, therefore, no heat losses exist, the energy consumption is extremely low, the environment-friendliness performance is good, maintenance is convenient to conduct, and ice expansion damage can be guaranteed not to occur to water retaining structures in the water conservancy project in the ice period in winter.

The invention provides a vibration isolator for a track floating slab, which comprises an upper cover plate, a bottom plate, a telescopic sleeve and a vibration isolation assembly, and is characterized in that the telescopic sleeve is connected between the upper cover plate and the bottom plate to form a sealed chamber; the vibration isolation assembly comprises a damping agent placed in the sealed chamber, the upper cover plate is provided with a damping adjustment assembly convenient for injecting and extracting the damping agent, the damping adjustment assembly comprises an injection through hole and a sealing plug, the injection through hole is formed in the upper cover plate, and the sealing plug is detachably mounted in the injection through hole. The vibration isolator has the advantages that large-range effective adjustment of damping is guaranteed, damping adjustment is convenient, and efficiency is high.

A waterproof rolling paper dispensing apparatus which comprises an inner cylinder which is closed at one end and open at an opposite end thereof. The inner cylinder has an elongate slit and supports a cutting edge which facilitates cutting of a length of rolling paper from a continuous roll of rolling paper accommodated within the inner cylinder. An exterior housing is dosed at one end and open at an opposite end thereof. The exterior housing defines an internal storage compartment which stores the inner cylinder. An end cover releasably engages with the open end of the exterior housing and forms a waterproof seal therewith. The end cover also releasably engages with the open end of the inner cylinder so that when the end cover is removed from engagement with the exterior housing, the inner cylinder remains coupled to the end cover and is removed with the end cover.

The invention discloses a YMF series circular optical fiber electric connector in the technical field of electric connectors. The electric connector comprises a plug and a socket, wherein the plug comprises a head shell, a locking sleeve, an optical plug body, a first pressing plate, a corrugated spring, a check clamping spring, a check clamping ring, a first disk head screw, a straight sleeve, aconductive O-shaped ring, a crimping sleeve, an inner sleeve, a shielding ring, a sealing ring, a pressing ring, a sealing nut, a spring, a plug sealing cover, a first rubber pad, a first step rivet,a first connecting sheet, a first stainless steel wire rope, a first heat-shrinkable tube, a first connecting sleeve and a fixing ring. The electric connector can easily realize connection and disconnection of the plug and the socket by adopting a threaded connection mechanism and clockwise and anticlockwise rotating the head shell. The outer wall of the head shell is provided with five splines, and therefore the function of preventing misinsertion can be achieved. Good waterproof sealing performance is achieved after a headstock of the electric connector is inserted.

A light-weight and high-strength composite wall board sequentially comprises an outer covering layer, a sandwich layer and an inner covering layer from the inside to the outside, wherein the outer covering layer and the inner covering layer are made of one or a mixture of several of high-strength glass fiber, carbon fiber or polypropylene high-strength fiber; the wall board further comprises resin embedded into spaces among the outer covering layer, the sandwich layer and the inner covering layer by a vacuum introduction method. The invention further discloses a production method of the light-weight and high-strength composite wall board. The light-weight and high-strength composite wall board is simple in structure and low in production cost; mechanical properties of the wall board are above 30% better than those of a conventional square-cabin wall board; the problem of stress concentration at corners of a square cabin is solved; the production method is simple and convenient to operate and high in production efficiency, and facilitates industrial production.

The invention provides a buried enhanced and modified polypropylene ripple cable sleeve. The buried enhanced and modified polypropylene ripple cable sleeve comprises a single-wall ripple pipe wall extending along the length direction of the sleeve, a buckling pipe fitting, and a sealing ring. The outer wall of the single-wall ripple pipe wall is provided with a plurality of annular bulges, the cross section of each annular bulge is shaped like an isosceles trapezoid, and the annular bulges adopt arc transition. The inner wall of the sealing ring sleeves one end of the outer wall of the single-wall ripple pipe wall. The inner wall of the buckling pipe fitting sleeves the outer wall of the sealing ring. The buckling pipe fitting comprises a first pipe fitting and a second pipe fitting. Arc side edges of the first and second pipe fittings are provided with stoppers. One end of the first pipe fitting is hinged to one end of the second pipe fitting, and the other end of the first pipe fitting is in buckled connection with the other end of the second pipe fitting. The buried enhanced and modified polypropylene ripple cable sleeve is a single-wall ripple pipe of a specific waveform, adopts the special anti-off buckling pipe fitting for connection, and is advantaged by being high in annular rigidity and low-temperature punching intensity, small in inner wall friction coefficient, light in weight, excellent in performances of environmental protection, high-temperature resistance, aging resistance, wear resistance, water resistance and sealing, capable of being coiled and piled, and convenient in construction.

The invention discloses a pipe robot. The pipe robot comprises a bracket, at least two driving devices rotationally arranged on the bracket, and a controller fixedly arranged on the bracket; each driving device is divided into three sections in the length direction, and comprises a driving drum and driving rollers arranged at the two ends of the driving drum; the driving rollers arranged at one ends of the driving drums are Mecanum wheels, and the driving rollers arranged at the other ends of the driving drums are Mecanum wheels or wheels; the driving drums comprise inner cylinders, outer cylinders rotationally sleeving the inner cylinders, and shells fixedly arranged at the externals of the outer cylinders; spiral blades are fixedly arranged on the outer peripheral surfaces of the shellsin the length directions; motors are fixedly arranged in the inner cylinders; and at the lower ends of the driving devices, the lower edges of the spiral blades are higher than the edges of the Mecanum wheels and the wheels. The motors are fixedly sealed in the inner cylinders to achieve good waterproof performance; the inner cylinders and the outer cylinders are rotationally connected through first connecting pieces and second connecting pieces; and the shells with the spiral blades sleeve the outer cylinders.

The invention discloses a waterproof self-locking radio-frequency coaxial connector assembly. The assembly comprises male and female radio-frequency coaxial connectors; the male connector comprises a cylindrical clamping jaw, a bush and a thread sleeve; a conical hole and a clamping jaw annular bulge are arranged at the front end of a cylindrical body of the clamping jaw; the clamping jaw annular bulge is provided with an outwards tilted radial conical surface which is tilted outwards and radially; an outer threaded section is arranged on the outer wall surface of the bush; the thread sleeve is provided with an inner threaded section and a first thread sleeve annular bulge which is bulged inwards; the thread sleeve is in threaded connection with the outer threaded section of the bush through the inner threaded section; the first thread sleeve annular bulge props against the outer conical surface when the thread sleeve is moved forwards through manual screwing; the outwards tilted radial conical surface of the clamping jaw props against a female annular bulge; the assembly further comprises a cylindrical waterproof sleeve made of an elastic waterproof material; and two ends of the waterproof sleeve tightly sleeve a female outer conductor and a cable respectively. According to the assembly, the female and male connectors are not mutually rotated and moved after being inserted and combined, so that stable dynamic intermodulation and stable radio-frequency signal transmission are achieved and the waterproof effect is good.

The invention discloses a novel glass fiber reinforced plastic lightning rod. The novel glass fiber reinforced plastic lightning rod comprises a rod body, a lightning rod body and a base, the rod bodyis formed by detachably connecting at least one holding pole, the holding pole comprises a coating layer, a filling later and a copper bar, a first flange sheet is arranged at the upper end of the coating layer, a second flange sheet is arranged at the lower end of the coating layer, and first annular grooves are formed in the end surfaces of both the first flange sheet and the second flange sheet; the coating layer and the copper bar are filled with the filling layer; a third flange sheet is arranged at the lower end of the lightning rod body, a second annular groove corresponding to the first annular grooves is formed in the end surface of the third flange sheet, and a downlead is arranged in the middle of the lower end of the lightning rod body; a third annular groove corresponding tothe first annular grooves is formed in the upper end of the base, and a ground lead penetrates through the middle of the base. The novel glass fiber reinforced plastic lightning rod has the advantagesof being convenient to install, flexile in assembly, good in insulation effect, and high in corrosion resistance and wind resistance.

The invention discloses a thermal-shrinkage-type insulation anode exhaust sealing cap and a preparation method thereof. The sealing cap is composed of an inner layer and an outer layer, wherein the inner layer is a hot melt adhesive layer, the outer layer is a thermal shrinkage layer, and the end part of the sealing cap is connected with a one-way valve; the material of the thermal shrinkage layer is composed of the following components in parts by weight: 40-50 parts of polyolefine interfusion resin, 25-30 parts of no halogen composite flame retardant and 15-25 parts of other assistants; thepolyolefine interfusion resin is composed of the following components in parts by weight: 20-30 parts of ethylene vinyl acetate and 70-80 parts of high-pressure low-density polyethylene; the halogen composite flame retardant is composed of the following components in parts by weight: 30-50 parts of magnesium hydroxide, 40-60 parts of aluminum hydroxide, and 5-10 parts of coating red phosphorus; and the other assistants are composed of the following components in parts by weight: 1-2 parts of an anti oxidant, 2-3 parts of sensitizing agent, and 1-2 parts of brightening agent. The sealing cap provided by the invention has a seal moisture proof and exhaust protection function.

The invention provides a fragrant environment-friendly sealant. The fragrant environment-friendly sealant is prepared from such raw materials in percentage by weight as 40-50% of butadiene rubber, 10-25% of polyisobutene, 5-8% of carbon black, 2-5% of stearin glue, 11-15% of nano calcium carbonate, 5-10% of bonding resin, 0.3-1% of barium sulfate, 2-5% of talcum powder and 5-20% of rose essential oil; the rose essential oil is extracted from rose flowers by use of a water vapor distillation method. According to the fragrant environment-friendly sealant, the proportions of the various components in the formula are optimized; the sealant is not prone to overflow, flow and move, and is good in waterproofing leakproofness; the product surface is quite smooth and high in adaptability; the rose essential oil is added to provide the sealant with rich sweet flowery smell and avoid the pungent smell of the traditional glue; meanwhile, the rose flowery smell also has the effects of anti-depression, calming and the like.

The invention relates to a high-strength flame-retardant heat-conducting condensed type power supply sealant and a preparation method therefor. The power supply sealant comprises a component A and a component B, wherein the component A comprises hydroxyl terminated organosiloxane, methyl terminated organosiloxane, silicon dioxide, aluminum oxide, aluminum hydroxide, aluminum silicate and carbon black; the component B comprises methyl terminated organosiloxane, organic tin and organosiloxane comprising sulfydryl, amino, ethyoxyl, vinyl and methylacryloyl. The high-strength flame-retardant heat-conducting condensed type power supply sealant provided by the invention fully combines the advantages of an addition type pouring sealant and a condensed type sealant and makes up the defects of the condensed type sealant, and a novel condensed type double-component power supply pouring sealant which is high in strength, high in adhesion, high in flame retardance and good in heat conductivity. Meanwhile, the sealant has an extremely strong adhesive force to metals, plastic, PCB boards and electronic components and is hard to poison.

The invention discloses a pan-tilt for an inspection robot of a transformer substation. The pan-tilt comprises a fixing base, a main cabin, a visible light camera cabin, an infrared camera cabin, a fill-in light lamp and a pickup. A connector is arranged between the visible light camera cabin and the infrared camera cabin, a horizontal driving mechanism for driving the pan-tilt to rotate horizontally and a vertical driving mechanism for driving the pan-tilt to rotate vertically are arranged in the main cabin, and an electric conduction slide ring is installed in the fixing base; the horizontaldriving mechanism is fixed to the upper portion of the electric conduction slide ring and comprises a harmonic reducer I, a synchronous wheel I, a second synchronous wheel II, a synchronous belt anda servo motor I with a coder, and the harmonic reducer I, the synchronous wheel I, the second synchronous wheel II, the synchronous belt and the servo motor I with the coder are fixed to the bottom wall of the main cabin; the vertical driving mechanism comprises a servo motor II with a coder, a harmonic reducer II, an active shaft and a passive shaft, and an optoelectronic switch trigger part andan optoelectronic detection switch are arranged in the horizontal driving mechanism and the vertical driving mechanism respectively. The pan-tilt has high repeat positioning precision and is high in stability and protection level, simple in structure and convenient to design.

A motion earphone of the invention relates to a wireless earphone. The motion earphone is provided with a U-shaped bracket. The front ends of side brackets at left part and right part are respectively bent downwards. Furthermore the motion earphone is provided with an earplug housing which is provided with an earplug movement. The middle part of the bracket is internally provided with a Bluetooth circuit, a digital / audio converting and controlling circuit, and a battery. The middle part of the bracket is provided with an independent housing. The left end and the right end of the bracket are respectively provided with an axial rectangular jack. Furthermore rectangular straight pipe parts of flexible T-shaped elastic pipes are inserted. The back ends of two independent hard side brackets are respectively oriented to the rectangular inserting parts which project to inside, and are inserted into rectangular inner holes of the straight pipe parts of the T-shaped elastic pipes. The outer edges of the two T-shaped elastic pipes are respectively clamped at a part between the left end of the housing and the back end of a corresponding side bracket and a part between the right end of the housing and the back end of the corresponding side bracket. The left side and the right side of the housing are respectively provided with a pin hole which traverses a corresponding jack and furthermore pins are mounted in the pin holes. Two pins respectively traverse a through hole which corresponds with the straight pipe part of the T-shaped elastic pipe and the inserting part of the side bracket, thereby connecting the straight pipe part of the T-shaped elastic pipe with the inserting part of the side bracket. The motion earphone can be adapted for hair style change of a user. Furthermore the motion earphone has elastic clamping force and is waterproof.

The invention discloses a three-way connecting component for pipe connection. The three-way connecting component comprises a joint body. The joint body is provided with a connecting part and three sections of joints for connecting with pipes. The three sections of joints are extended towards three directions from the connecting part. An expansion hole is formed in each joint. A mandrel is assembled in each expansion hole, and a corresponding joint can be connected with the inner wall of a corresponding pipe in an expansion way through the mandrel. A through hole opposite to each expansion hole is formed in the connecting part, and a tool is inserted into the through hole to control a corresponding mandrel. The three-way connecting component has the advantages of simple structure, low cost, convenience and high speed in mounting, high waterproofness, capability of improving the attractive appearance of the product, and the like.

The invention provides a spanwise bending and chordwise oscillation controllable multi-skeleton propulsion mechanism simulating a pectoral fin of a manta ray and belongs to the field of bionic underwater vehicles. The propulsion mechanism comprises a pectoral fin skeleton, wire rollers and driving motors, a steering motor assembly and a skin, wherein the pectoral fin skeleton consists of a plurality of NACA00 airfoil skeletons, steel wires and a middle cross beam; the chord length of the plurality of skeletons is sequentially reduced from the root of the pectoral fin to the tip of the pectoralfin in the axial direction of the pectoral fin skeleton; the front edge and the rear edge of each skeleton are separately connected through the steel wires, to form the outer edges of the pectoral fin skeleton; and the spanwise bending oscillation freedom and the spanwise rotation and chordwise oscillation freedom of a flapping wing are separately realized by the wire rollers and driving motors and the steering motor assembly. As the driving part is all arranged at the root of the wing, the problems of too-large torque required by oscillation caused by the too-heavy tip of the wing, difficultdriving and high energy consumption are solved. As the rotating motor is also arranged at the root of the wing, the compact structure of the electrified part is favorable to water proofing and sealing, and underwater work is safe and reliable.

The invention discloses an LED lens set with a firm structure and good durability. The LED lens set with the firm structure and good durability comprises a lens base, lenses which are arranged on the lens base, a liquid silica gel ring groove, a solid silica gel ring groove, a plurality of screw containing grooves and wire containing grooves, wherein the liquid silica gel ring groove and the solid silica gel ring groove are formed in the edge of the lens base, screw containing grooves are formed in the lens base, the edge of the periphery of the lens base is thickened, the edge of the thickened lens base is obviously higher than the adjacent position of the inner side of the lens base, so that a circle of protrusions are formed, and the protrusions has a shape which can guide the direction of water flow. Due to the fact that the edge of the periphery of the lens base is thickened, reinforced ribs are additionally arranged, and a partition structure used for reinforcing is arranged inside each wire containing groove, firmness and durability of one LED lens are improved, and the middle of one lens can not protrude after one lens is used for a long time.

The invention provides an LED lighting device including a heat dissipation lamp holder, an LED chip, a fireproof lamp tube, a reflection cup and lamp cover, a cup bottom sealing ring, a cup body sealing ring, a lamp tube sealing gasket and a lamp cover sealing ring, the fireproof lamp barrel is connected to the heat dissipation lamp holder; wherein a lamp tube sealing gasket is arranged between the fireproof lamp barrel and the heat dissipation lamp holder, the cup bottom of the reflection cup is hermetically connected to the heat dissipation lamp holder through a cup bottom sealing ring, thecup body of the reflection cup is hermetically connected to the fireproof lamp tube through a cup body sealing ring, a lamp cover sealing ring is arranged between the lamp cover and the fireproof lamptube, the cup opening of the reflection cup is hermetically connected to the lamp cover, and the lamp cover forms a light-emitting lens. According to the invention, high-sealing connection between the lamp tube and the heat dissipation lamp holder in a split design is realized. According to the LED lighting device, the structure of the reflection cup is improved, meanwhile, sealing design is conducted from the cup bottom, the cup body and the cup opening, a lamp cover sealing structure is designed, the sealing effect is greatly improved, the flame-retardant sealing grid is innovatively introduced, flame retardance and sealing performance are ensured, and the whole LED lighting device is convenient to assemble, low in weight, excellent in fireproof and waterproof sealing performance and wide in application prospect.

The invention discloses a waterproof USB connector and a manufacturing method thereof. The waterproof USB connector comprises a third terminal module, a first waterproof ring sleeving the third terminal module, a first shell housing the third terminal module and the first waterproof ring, a second shell closing the rear end of the first shell and injection molded at the rear end of the first shell and a second waterproof ring sleeving the front end of the first shell, wherein a gap between the tail portion of the third terminal module and the interior of the first shell is completely filled by the second shell. By adopting the triple waterproof design, the waterproof sealing effect is ideal, and a present highest waterproof grade can be achieved; and the third terminal module and the second shell are obtained by virtue of the injection molding process and the embedding molding process, so that the connection sealability among various components of the waterproof USB connector is improved, and the waterproof function is effectively improved.

The invention discloses an active variable stiffness pectoral fin based on nylon artificial muscles and a bionic underwater robot. The active variable stiffness pectoral fin comprises a front edge finray, a middle fin ray and a tail fin ray which are sequentially arranged; a front flexible fin surface is arranged between the middle fin ray and the front edge fin ray; a tail flexible fin surface is arranged between the middle fin ray and the tail fin ray; a plurality of through holes are formed in the front flexible fin surface and the tail flexible fin surface in the direction perpendicular to the middle fin ray; a nylon artificial muscle is arranged in each through hole, the nylon artificial muscle in the front flexible fin surface is connected to the front edge fin ray and the middle fin ray, and the nylon artificial muscle in the tail flexible fin surface is connected to the middle fin ray and the tail fin ray. A biological active variable stiffness mechanism is fully utilized, active continuous regulation and control of pectoral fin stiffness are achieved by simulating a muscle relaxation or contraction state similar to a biological state through nylon artificial muscles, andthe fluctuation amplitude and the fluctuation number of propelling waves during pectoral fin flapping are adjusted.

The invention relates to a waterproof sealing hot melt adhesive capable of evacuating electric stress and a production method thereof. The waterproof sealing hot melt adhesive capable of evacuating electric stress has a dielectric constant of 14 to 25 and volume resistivity of 1.0 * 10 <8> to 1.0 * 10 <10> omega.cm. The production method for the hot melt adhesive comprises a step of preparing a rubber compound from chloroprene rubber, brominated butyl rubber and a plurality of auxiliary agents, a step of carrying out extrusion and compaction so as to prepare a flaky strip and a step of cutting the flaky strip so as to obtain the waterproof sealing hot melt adhesive capable of evacuating electric stress. Compared with conventional hot melt adhesives capable of evacuating electric stress, the waterproof sealing hot melt adhesive capable of evacuating electric stress provided by the invention has the following advantages: the waterproof sealing hot melt adhesive has both an electric stress evacuating effect and a waterproof sealing effect, operation steps in construction are reduced, construction is simplified and facilitated, and work efficiency is improved to a large extent.

A handpiece of a dental scaler includes an outer sheath and an inner housing received in the outer sheath. An inner surface of the outer sheath forms an inclined section converging toward an end of the sheath. An end of the inner housing is reduced and is complementary in shape to the converged inner surface of the outer sheath whereby a surface contact is formed between the outer sheath and the inner housing. A circumferential groove is defined in the reduced end of the inner housing to receive an O-ring. An inner-threaded fastener is threadingly fixed to an opposite, threaded end of the outer sheath and has an inner shoulder engaging a step formed in the inner housing thereby inducing an axial linear movement on the inner housing with respect to the outer sheath to compress and deform the O-ring for securing watertightness between the outer sheath and the inner housing.

The invention discloses an angle ejection mechanism of an injection mold. The angle ejection mechanism comprises an angle ejector rod and a cylinder which is arranged on the angle ejector rod in a sleeving mode and fixed in a moving mold plate, a piston is arranged on the angle ejector rod and contained in the cylinder and can be driven by the angle ejector rod to slide up and down in the axial direction of the cylinder, it is defined that at least one air inlet hole which is communicated with the interior of the cylinder is formed in the outer wall of the cylinder, at least one one-way-circulation air tap which enables air to only enter but not come out of the cylinder is arranged at the bottom of the cylinder, the movement range of the piston is between the air inlet holes and the air taps, when the angle ejector rod is driven by an ejector plate to be lifted to conduct demolding, the piston produces a certain damping effect, the rising speed of the angle ejector rod is decreased, and the situation that due to the fact that the ejecting speed of the angle ejector rod is too high, the demolding quality of a product is affected is avoided; in the withdrawing process, the angle ejector rod piston compresses the air, and large damping can be produced, so that the speed of the angle ejector rod in the process of returning to a containing groove is just decreased to zero, and the service life is prolonged.

The invention discloses an underwater anchor rope tension force acquisition device which comprises a tension sensor, a battery pack, a microprocessor circuit board, a memory, a USB interface and a waterproof seal housing. The waterproof seal housing comprises a sensor waterproof housing, a flange pipe, a flange cover, a screwed sleeve pipe and a seal nut. The tension sensor, the battery pack and the microprocessor circuit board are arranged in the waterproof seal housing; the anchor rope tension data collected by the tension sensor can be automatically recorded and stored in the memory; and an external device can read the anchor rope tension data through the USB interface. The underwater anchor rope tension force acquisition device can be placed and work underwater as a whole, thereby reducing impact of wave to the device; and the device has the advantages of high safety and high practicality, and can meet the use condition for measuring anchor rope tension force under the adverse sea conditions, especially the typhoon condition.

The present invention discloses a waterproof cover assembly disposed at a surface of a shell of an electronic device for sealing a port at the surface of the shell. The waterproof cover assembly comprises a doorframe, an outer cover, a flexible waterproof member, a combining member, a pressing member and a driving device. The doorframe is located at the port to be combined with the shell. The outer cover is detachably disposed at an inner edge of the doorframe. The flexible waterproof member is fixedly disposed at the outer cover; the pressing is movably disposed at the outer cover. The flexible waterproof member has a containing slot; the driving device can drive the pressing member to enter the containing slot, so as to enlarge the section area of the flexible waterproof member. When the outer cover is moved to the port and the flexible waterproof member is moved into the doorframe, the pressing member can enlarge the flexible waterproof member to contact with the inner edge of the doorframe tightly, so that the port is sealed.