68 results about "Mouth structure" patented technology

The utility model discloses a reel jaw structure convenient to disassemble and assemble, which comprises a hollow main shaft, a plurality of arched blocks and a clamp block are uniformly arranged on the peripheral side of the hollow main shaft, a jaw comprises an upper clamp block and a lower clamp block, a jaw is arranged between the upper clamp block and the lower clamp block, a jaw strip is arranged on the inner side of the jaw, and a plurality of arc-shaped blocks are uniformly arranged on the inner side of the jaw strip. A mounting shaft is arranged on the lower side between the upper clamp block and the lower clamp block, and a mounting groove corresponding to the mounting shaft is formed in the side surface of the hollow main shaft. An upper jaw spring sleeve is arranged on the inner side of the upper clamp block, and an upper jaw spring is arranged on the inner side of the upper jaw spring sleeve. The structure is simple in disassembly and assembly working principle, reasonable in design, easy and convenient to operate and reliable to use, the requirement for convenience of disassembly and assembly of the reel clamp block during maintenance can be met, the labor intensity of workers for disassembly and assembly of the reel jaw is reduced, the use of manpower resources is reduced, the one-time production cost and the use and maintenance cost of enterprises are reduced, and meanwhile the production efficiency is improved.

The utility model discloses an anti-skid embedded plastic bucket opening structure, and relates to the technical field of bucket opening structures. According to the anti-skid embedded plastic bucket opening structure, the anti-skid function is achieved by arranging the connecting ring, the anti-skid protrusions, the connecting plates, the first clamping blocks, the connecting grooves and the sliding grooves, the connecting ring is fixed to the top of the bucket body through the first clamping blocks, the sliding grooves and the connecting grooves, and due to the fact that the anti-skid protrusions are arranged on the surface of the connecting ring, friction force of the surface of the connecting ring is increased; the whole barrel body can be more firmly grabbed by a user when the barrel body is taken; by arranging a moving ring, a top block, a connecting frame, a second clamping block, a moving plate, a sliding rod, a spring, a connecting ring, an anti-skid protrusion, a connecting plate, a first clamping block, a connecting groove and a sliding groove, the functions of dismounting and mounting the connecting ring are achieved; the barrel body and the connecting ring can be separated, the damaged barrel body or the damaged connecting ring can be replaced, resources are saved, and waste is avoided.

A lonicera caerulea fruit picking clamp with a crab-claw-shaped jaw structure belongs to the field of lonicera caerulea fruit picking tools and comprises a positioning clamp arm and a cutting clamp arm, the positioning clamp arm and the cutting clamp arm are respectively provided with a control handle, the control handles are mutually crossed and hinged to form a picking clamp body, and the front end of the positioning clamp arm is provided with a bearing frame and is correspondingly provided with a storage channel. The bearing frame is of a crab claw-shaped jaw structure with a bearing face and a V-shaped jaw, a shearing blade is arranged on the edge of one side of the V-shaped jaw, the bearing frame and the containing channel are arranged correspondingly, a cutting blade is arranged at the front end of the shearing pliers arm, and a lateral blade corresponding to the shearing blade structure on the edge of one side of the V-shaped jaw is arranged on the cutting blade. The V-shaped jaw can be matched with the bearing frame to form a shearing structure, the V-shaped jaw is matched with the cutting blade to shear off fruit stems to achieve picking, fruits do not bear any external force in the harvesting process, the harvesting quality can be fully guaranteed, the picking difficulty can be lowered in production and use, the picking efficiency is improved, the labor intensity is relieved, and potential safety hazards are reduced.

The utility model relates to a liner of a breathing mask and the breathing mask, and relates to the technical field of ventilation treatment. The pad of the breathing mask comprises a mouth-nose pad body internally provided with a cavity, and the mouth-nose pad body comprises a nose structural body, a mouth structural body and a mouth-nose connecting part connecting the nose structural body and the mouth structural body. Due to the fact that the step structure with the plane step is formed between the mouth-nose connecting part and the top supporting part and / or between the mouth-nose connecting part and the side supporting part, when the nose structural body is subjected to the pressure of the gas in the cavity, the plane step can serve as an acting platform of the pressure. Therefore, the mouth-nose connecting part can be driven to deform, and the top supporting part, the side supporting part and the nose concave part are driven to integrally move upwards, so that the mouth-nose connecting part can better fit the nose of a user, and the comfort of the user and the wearing compliance are improved.

The utility model discloses a solution containing barrel which comprises a barrel body, a bottle opening structure is arranged at the top end of the barrel body and comprises a bottle opening, a thread A, an inner cover, a connecting thread A, a thread B, a connecting ring A, an outer cover and a connecting thread B. The bottle opening is arranged at the top end of the barrel body, the thread A is arranged on the outer surface of the bottle opening, the inner cover is connected to the outer side of the bottle opening, and the connecting ring A is arranged on the outer side of the inner cover. The inner wall of the inner cover is provided with a connecting thread A in threaded connection with the thread A. The outer side of the inner cover is connected with an outer cover. By means of the designed bottle opening structure, the bottle opening structure is provided with two connecting structures with different specifications, namely the thread A and the thread B, so that the bottle opening structure can be matched with threaded connectors with different specifications, the connecting stability between the connecting cover on the liquid pumping pipe and the bottle opening structure on the barrel body is guaranteed, drifting of the liquid pumping pipe and solution pollution are not prone to occurring, and follow-up cleaning work is facilitated.

The utility model relates to the technical field of five-gallon barrels, in particular to a five-gallon barrel opening structure which comprises a barrel opening, a plurality of fixing blocks are fixedly connected to the outer wall of the barrel opening, rotating rods are movably connected to the inner walls of the fixing blocks, and pressing heads are fixedly connected to the tops of the rotating rods. A first spring is fixedly connected to the outer wall of the rotating rod, a linkage rod is movably connected to the outer wall of the rotating rod, multiple limiting grooves are formed in the outer wall of the can opening, sliding rod grooves are formed in the bottoms of the interiors of the multiple limiting grooves, limiting blocks are installed in the multiple limiting grooves, and connecting blocks are fixedly connected to the outer walls of the limiting blocks; the bottom of the limiting block is fixedly connected with a sliding rod. The barrel cover is convenient and fast to disassemble and assemble, the operation process is simple, a special cover pulling machine does not need to be used additionally, and the cost is saved.

The invention provides a split type combined vacuum tank for multielement co-permeation of super-long steel bars, which comprises a plurality of unit tanks, the plurality of unit tanks are sequentially connected to form a complete tank, the joint of every two adjacent unit tanks is provided with a child-mother opening which is matched with the child-mother opening, the child opening of one unit tank is inserted into the mother opening of the other unit tank, and the child-mother opening of the other unit tank is connected with the child-mother opening of the other unit tank. The secondary opening is in interference fit with the primary opening; chucks are arranged at the adjacent ends of the two unit tanks, the two chucks are connected through a clamping ring, the clamping ring wraps the outer sides of the chucks, and the two chucks are in interference fit with the clamping ring. The sealing device has the beneficial effects that random combination can be achieved according to the length of materials, and meanwhile the sealing performance is considered. Due to the split design, the transportation size is reduced, and the transportation problem of an ultra-long tank is solved; double positioning is carried out through the child-mother opening structure, and the sealing performance of the tank opening can be effectively improved through the child-mother opening connecting mode; the unit tanks are connected through the chucks and the clamping rings, the chucks and the clamping rings are in interference fit to be clamped and then fixed, and installation efficiency is improved.

The utility model relates to the technical field of drainage of sponge cities, in particular to a siphon overflow well mouth structure of a sponge city, which comprises a well mouth, an overflow port is arranged on the well mouth, the upper end of the overflow port is connected with an overflow port well seat, an overflow well cover is connected in the overflow port well seat, and at least one pipe placing groove is arranged on the upper portion of the overflow port. A U-shaped pipe is connected into the pipe containing groove, the opening portion of an external pipe section of the U-shaped pipe faces the outside of the well mouth and does not make contact with the upper face of the well mouth, and an internal pipe section of the U-shaped pipe extends into the overflow opening. A central overflow port is formed in the middle of the overflow well lid; and a prompting assembly is movably inserted into the central overflow port. The drainage device is easy to construct, low in cost and good in drainage effect, and can indicate the position of a well mouth during waterlogging disasters.

Open-end wrench with an asymmetrically structured jaw opening, comprising a handle (10) and a head (20), wherein the handle (10) and the head (20) are connected to each other such that the head (20) is connected to one end of the handle (10), characterized in that an opening (20A), a load-bearing surface (21), two force-application surfaces (22), at least one rounded surface (23), at least one fixing surface (24), a plurality of deflection notches (25), and a clamping surface (26) are arranged on the head (20), wherein the load-bearing surface (21), the force-application surfaces (22), the at least one rounded surface (23), the at least one fixing surface (24), the deflection notches (25), and the clamping surface (26) are directed towards the opening (20A), wherein the load-bearing surface (21) faces the two force-application surfaces (22), wherein the two force-application surfaces (22) are a first force application area (221) and a second force application area.(222) wherein the rounded surface (23) is arranged between the fixing surface (24) and the first force application surface (221), wherein at least one of the avoidance notches (25) is arranged between the first force application surface (221) and the second force application surface (222), wherein one of the avoidance notches (25) is arranged between the second force application surface (222) and the clamping surface (26); and that the loaded surface (21) has a plurality of the avoidance notches (25).

The utility model discloses a combined type quick-change jaw structure which comprises a fixed jaw and a quick-change jaw, a T-shaped open slot is formed in one side, facing the fixed jaw, of the quick-change jaw, a locking rod is inserted into the T-shaped open slot, the head of the locking rod is in a T shape matched with the T-shaped open slot, and the head of the locking rod is connected with the fixed jaw. A spring is arranged on the side, away from the T-shaped open groove, of the locking rod, the top of the locking rod is connected to the driving rod, the fixed jaw is connected with a compression screw matched with the driving rod, and a clamping spring matched with the compression screw is connected into the driving rod. Compared with the prior art, the utility model has the advantages that: 1, the jaw structure of the combined type quick-change flat tongs is provided, and the problem that the jaw of the existing flat tongs is inconvenient to replace is solved; 2, the jaw is efficiently and quickly replaced, the replacement time of the jaw is shortened, and the production efficiency is improved;

The utility model belongs to the technical field of molds, and particularly relates to a glue breaking opening structure and a mold mechanism, the glue breaking opening structure comprises a mold body, an insert pin assembly, a supporting block and a plurality of elastic pieces, the mold body is provided with a mold cavity used for manufacturing a workpiece to be cast and a containing groove communicated with the mold cavity, and the supporting block is installed in the containing groove. The supporting block is provided with a first through hole and a plurality of first mounting holes formed around the first through hole at intervals in the circumferential direction, and the elastic pieces are mounted in the first mounting holes in a one-to-one correspondence mode; the insert pin assembly is movably installed in the first through hole and provided with a convex part abutting against all the elastic pieces, and the end, away from the convex part, of the insert pin assembly extends into or retreats from the glue injection opening of the workpiece to be cast. According to the utility model, the glue breaking port structure can finish the work of the glue breaking port of the workpiece to be cast in advance, so that the quality of the workpiece to be cast is ensured; and the glue breaking opening structure is simple in structure and low in manufacturing cost.

The utility model discloses a grouting hole casing pipe lower opening structure which comprises a grouting hole, a base plate is attached to the upper surface of the grouting hole, a square pipe is fixedly connected to the center of the upper surface of the base plate, supporting blocks are symmetrically and fixedly connected to the lower surface of the base plate, a round pipe is fixedly connected to the other ends of the supporting blocks, and the round pipe is located in the center of the lower surface of the base plate. The outer wall of the circular pipe is attached to the inner wall of the grouting hole. Limiting structures are further arranged on the two sides of the square pipe, a sleeve can be clamped, a plurality of rubber strips are connected into a circular groove block in a glued mode to increase friction force, clamping of the sleeve can be more stable, meanwhile, stretching and retracting of a hydraulic cylinder can be controlled, the sleeve continues to slide downwards, and the situation that the grouting effect and quality are affected due to displacement in the grouting process is avoided; accurate control and clamping are conducted, it can be guaranteed that the casing pipe is firm and stable in the grouting process, and the problem of displacement is avoided.

The utility model relates to the technical field of rubber tube moulds, in particular to a special-shaped flat mouth structure rubber tube mould which comprises a mould core, a connector is arranged on one side of the mould core in an attached mode, one side of the mould core and one side of the connector are both of a cylindrical structure, and the outer diameter of the mould core is the same as the outer diameter of a cylindrical area of the connector. A die head is arranged at the end, away from the die core, of the connector. According to the scheme, through the unique design of the first transition curved surface, smooth transition of the rubber tube from a round port to a square port is achieved, stress concentration and material damage in the tube blank deformation process are effectively avoided, and the process that the rubber tube is led into the rectangular channel is further optimized through cooperation of the conical channel and the second transition curved surface; and it is ensured that the deformed pipe blank can quickly and accurately enter the shaping stage, the mold core and the connector are assembled more conveniently through the insertion rod and the insertion groove which are in threaded connection, a user can flexibly switch the mold heads according to the production requirement, and the production efficiency and the mold universality are remarkably improved.

Disclosed is a working end of a surgical instrument for delivering heat energy to tissue and (RF) energy for cutting tissue of different modalities. The working end includes paired first and second metal jaw members movable between open and closed positions, with each jaw member defining a jaw body and jaw end-effecter for engaging and heating tissue for the sealing of the tissue or vessels, or welding and coagulation of the tissue and jaw structure capable of generating radiofrequency (RF) energy for cutting tissue. Jaw members contain a microwave emitter coupled to a microwave energy source, the emitter is located within the jaw end effecter, which effecter includes an insert made of a microwave energy absorbing material which converts microwave energy into the heat energy. Jaw members also contain electrodes located within the jaw effecter end coupled to a radiofrequency (RF) energy source for procedures including tissue cutting, etc.

The invention discloses an auxiliary tool for opening and closing various valve wheel discs, which comprises a screw rod, the screw rod comprises a horizontal rod and a vertical rod, the horizontal rod and the vertical rod are arranged in an L shape, a detachable jaw is movably arranged on the side surface of the vertical rod to realize jaw size adjustment, the detachable jaw and the horizontal rod are arranged in parallel, and the screw rod and the detachable jaw are arranged in an F shape. A detachable stress application rod is movably arranged at the bottom of the vertical rod, the length of the vertical rod is adjusted, and the size of the detachable jaw structure is the same as that of the detachable stress application rod structure. According to the invention, the operation is convenient and efficient, all the components are detachably connected, carrying and storage are convenient, the detachable jaw and the detachable stress application rod can be set to be of the same specification, the types of parts are reduced, the jaw can be rapidly replaced and the stress application rod can be rapidly spliced during field operation, the tool searching and adapting time is shortened, and the working efficiency is improved. And the convenience and the efficiency of valve opening and closing operation of a certain offshore platform are remarkably improved, and high practical value and wide popularization prospects are achieved.

Disclosed is a working end of a surgical instrument for delivering heat energy to tissue and (RF) energy for cutting tissue of different modalities. The working end includes paired first and second metal jaw members movable between open and closed positions, with each jaw member defining a jaw body and jaw end-effecter for engaging and heating tissue for the sealing of the tissue or vessels, or welding and coagulation of the tissue and jaw structure capable of generating radiofrequency (RF) energy for cutting tissue. Jaw members contain a microwave emitter coupled to a microwave energy source, the emitter is located within the jaw end effecter, which effecter includes an insert made of a microwave energy absorbing material which converts microwave energy into the heat energy. Jaw members also contain electrodes located within the jaw effecter end coupled to a radiofrequency (RF) energy source for procedures including tissue cutting, etc.

A fire-dragon cupping device integrated with functions of cupping and scraping includes: an outer cupping body; a lotus-petal-shaped mouth structure disposed on the outer cupping body; a circular mouth structure including an inner cupping body and a circular mouth connected to a top of the inner cupping body; a connecting ring disposed on an inner wall of the transmission sleeve; meshing transmission assemblies annularly arranged on a bottom of an interior of the outer cupping body; and a screw rod drive assembly disposed on a bottom of the outer cupping body. The lotus-petal-shaped mouth structure includes: an assembly ring fixedly installed on a top of the outer cupping body, a transmission sleeve, and a lotus-shaped mouth disposed on a top of the transmission sleeve. The fire-dragon cupping device, through position switching of the lotus-petal-shaped mouth structure and the circular mouth structure, possess multiple therapeutic effects of scraping, moxibustion, and cupping.

A patient interface structure includes a cushion configured to sealingly engage the patient's face and a front that is more rigid than the cushion. The cushion includes a forward opening, a rearward opening that is opposite the forward opening and a continuous sealing surface. The continuous sealing surface has a mouth sealing portion configured to seal around the patient's mouth and a nasal sealing portion configured to seal around both of the patient's nasal airways. The front plate includes an air inlet configured to both receive the pressurized respiratory gas and secure headgear to the patient interface structure. In addition, the nasal sealing portion includes at least one aperture that is separate from the rearward opening. Also, the front plate, the mouth sealing portion and the nasal sealing portion together form a common chamber.

A bottle cap is fastened on a bottle body in a covering mode, bottle openings are symmetrically arranged on the bottle cap, a partition plate is connected into the bottle body in an inserted mode, the partition plate corresponds to the position of a liquid outlet head on the bottle cap, the space in the bottle body is partitioned, and due to the double-bottle-opening structural design, the use functionality is higher.

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

The utility model relates to a pneumatic soft robot mouth structure which mainly comprises a driving structure and a lip structure, the lip structure is composed of a conductive yarn braided fabric and a rubber hose, an air pipe is arranged in the rubber hose, and a dense braided area and a sparse braided area are distributed on the conductive yarn braided fabric so as to achieve different elasticity and conductivity. The air chambers are symmetrically distributed and connected with a lip structure through an adjusting structure such as a telescopic rod, and accurate control is achieved. The two ends of the rubber hose are connected with the air chamber through air pipes, the air pipes are sleeved with sliding blocks, branch air pipes are arranged in the air pipes and matched with sliding grooves in the air chamber, and the air flow can be adjusted. An arc-shaped communicating air pipe is arranged in the air chamber to ensure uniform distribution of air pressure. The whole structure is in universal connection, movement flexibility and stability are improved, the robot mouth can simulate natural movement of human lips, and the robot mouth is suitable for communication, expressions and specific function execution.

The utility model discloses a disposable isolation sleeve for dental photo curing machine, the isolation sleeve adopts medical grade transparent plastic integrated moulding, and the whole is the tubular structure, including the front joint adaptation section, main part cylinder section and tail part open section that connect in proper order along the axial direction, the exhaust hole that penetrates the inside and outside wall is opened in the middle part of main part cylinder section, can discharge the closed air chamber air formed when the front joint cover goes in quickly, eliminates the air pressure obstruction, the tail part open section is designed as the horn shape gradual change flared mouth structure, and the inside diameter of its export end is greater than the entry end, makes the button, the convex etc. of photo curing machine fuselage pass through smoothly, avoids the installation jam and the wrinkle. Through the structure optimization, the adhesion of isolation sleeve and photo curing machine has been improved significantly, and the isolation protection effect has been strengthened, and the clinical installation operation has been simplified, and reliable support is provided for the cross infection prevention and control of dental diagnosis and treatment.

The utility model provides a bag mouth structure for filling a liquid sealing bag, which is applied to the technical field of liquid sealing bags and is characterized by comprising a bag mouth and a one-way valve component mounted in the bag mouth, the one-way valve assembly comprises a sealing rubber plug and a lining which are arranged in the bag mouth, and a sealing face is formed between the sealing rubber plug and the lining through the elastic force effect of the sealing rubber plug. The sealing rubber plug has the technical effects that the sealing rubber plug has certain hardness and rebound resilience, certain pressure is applied to the sealing rubber plug, so that the sealing rubber plug can be shrunk, and a liquid channel is formed between the sealing rubber plug and the bushing, so that a liquid product can be conveniently filled and poured; when the external force is removed, the sealing rubber plug can rebound and abut against the lining through the elastic force of the sealing rubber plug, and a sealing face is formed between the sealing rubber plug and the lining to prevent medium backflow; and the bag mouth can be quickly opened and closed.

The utility model relates to the field of lock catches, in particular to a lock catch device applied to a server, meanwhile, the other end of a hinge piece is rotationally connected with a handle part and used for restraining the handle part to only do one-way linear movement during locking, and a locking mechanism is clamped and fixed with the handle part embedded into a shell. The linear length direction of the notch structure is opposite to the opening, the tail end of the handle part is connected with the clamping tongue through a shaft body, and the shaft body penetrates through the notch structure, so that the handle part linearly moves along with sliding of the shaft body in the notch structure; the notch structure in the shell is used for limiting the clamping tongue connected with the shaft body, the notch structure plays a guiding role and restrains the moving direction of the clamping tongue, in other words, under the effect of the notch structure, the clamping tongue cannot shake, and therefore the situation that an opening is rubbed or the clamping tongue abuts against the shell to generate interference is avoided, and the service life of the clamping tongue is prolonged. And the movement smoothness of the clamping tongue is ensured.

A spout packaging structure includes a spout structure, a cutting element, and a cap. The spout structure includes a fixing part and a mouth part connected to the fixing part. The mouth part has a cylindrical structure and first internal threads. Each protruding tooth structure of the first internal threads is provided with first and second inclined surfaces located on two sides of the protruding tooth structure with a recessed structure between two adjacent protruding ones. The first inclined surface faces the fixing part. Within a same cross section through the mouth part's axis, the bottom of the recessed structure has a tangent parallel to the mouth part's axis, angle α between the first inclined surface and the tangent is 110°-145°, and angle β between the second inclined surface and the tangent is at least 90°. The cutting element is sleeved in the mouth part with first external threads.

A clip for increased grounding of a high-definition multimedia interface (HDMI) receptacle includes a lower jaw structure, an upper jaw structure opposite the lower jaw structure, a compression hinge that connects the lower jaw structure to the upper jaw structure and clamps a PCB between the lower jaw structure at a grounding pad on a first surface of the PCB, and the upper jaw structure at an HDMI receptacle mating area on a second surface of the PCB opposite the first surface, a prong structure, and an expansion hinge that connects the prong structure to the upper jaw structure opposite the compression hinge and presses the prong structure against an exterior surface of an HDMI receptacle installed on the first surface of the PCB.

The utility model relates to blow mould technology field especially is concerned to a kind of large capacity straight line bottle mould bottle clamp mouth structure, it includes mould body and bottle clamp mouth module.Mould body top is equipped with bottle mouth injection molding area and annular clamping groove, bottle clamp mouth module is supported in annular clamping groove by cylindrical portion and realizes installation, plate portion is equipped with heating head guide through-hole, is located directly above bottle mouth injection molding area.Bottle clamp mouth module optimally stainless steel material, plate portion is equipped with snatch hole and is convenient to dismount, mould body top can be equipped with round boss portion and bottle clamp mouth module is pasted together.The utility model can effectively protect bottle mouth area, avoid scratch or damage, improve installation stability and durability, simplify dismounting operation simultaneously, improve production efficiency and product quality.

The utility model relates to an automatic protection device for a steel cylinder, which comprises a connector, a first fitting piece, a second fitting piece and a blocking ball, a pressure relief cavity and a pressure relief hole are arranged in the connector, the first fitting piece is arranged in the pressure relief cavity and is provided with a pressure relief channel communicated with the pressure relief cavity, the second fitting piece comprises a main loop bar and a loop bar, and a spring is arranged between the main loop bar and the loop bar. The blocking ball seals the pressure relief channel through the spring, flexible adjustment and quick response of the pressure relief range are achieved through the taper hole and the horn mouth structure, the taper hole accelerates airflow, concentrates pressure and improves sensitivity, the horn mouth enlarges the sealing area and enhances reliability, the overall structure is matched with various steel cylinders, and the problem that an existing pressure relief valve is inconvenient to match is solved.

The utility model relates to the technical field of seam allowance structures, in particular to a connecting piece and a movable seam allowance waterproof structure, which are characterized in that an independent metal plate unit is arranged at the joint of an upper shell and a lower shell, and two sides of the independent metal plate unit are fixedly connected with the upper shell and the lower shell respectively to form a closed U-shaped gluing groove. The section of each independent metal plate unit is of the bent structure and comprises the vertical section and the horizontal section, the horizontal section extends outwards to form the glue groove wall, the glue groove is filled with the sealant, and the waterproof barrier is formed after curing.

The utility model relates to the technical field of dental scalers, and discloses a dental scaler with oral spray, the dental scaler comprises a tooth washing assembly and a spray assembly, the spray assembly is detachably connected to the tooth washing assembly, the tooth washing assembly can supply power to the spray assembly, and the spray assembly is used for generating spray. The spraying assembly comprises a connecting cover and a spraying unit, the spraying unit is arranged in the connecting cover, a power supply contact is arranged on the tooth washing assembly, and the spraying unit can be electrically connected with the power supply contact. One end of the connecting cover is provided with an opening part forming an opening structure, and the opening part can be connected to one end of the tooth washing assembly in a sleeving mode or taken down from one end of the tooth washing assembly. The spraying unit comprises a water storage bin, a spraying piece and a spraying PCBA, a water injection opening communicated with the water storage bin is formed in the connecting cover, a spraying opening communicated with the bottom of the water storage bin is formed in the connecting cover, the spraying piece is arranged in the spraying opening, and the spraying PCBA is electrically connected with the spraying piece. The oral cavity spray nursing device is convenient for spray nursing or tooth cleaning nursing after the oral cavity is flushed.