220results about How to "Easy to use force" patented technology

The invention provides a full-automatic assembling line for electric fuel pump cores, aiming at solving the problems that the manual assembling correctness is poor, the product accuracy is not guaranteed, the production efficiency is low and the potential safety hazards are big at present. The invention relates to the assembling field of automobile electric fuel pumps. The full-automatic assembling line is formed by an upper control computer system and independent control systems of special machines in a connecting way through a bus. The full-automatic assembling line mainly comprises a ring conveying line, a special numerical-control hydraulic rivet pressing machine, a special automatic assembling machine, a special automatic detection machine and an unqualified product unloading area. Follower tooling plates are conveyed by using the ring conveying line. Parts and assemblies which are required to be assembled are loaded on the follower tooling plates. Since the full-automatic assembling line adopts a full-automatic assembling mode, the assembling correctness and the assembling accuracy of the automobile fuel pumps can be guaranteed; the requirement on the detection of various necessary performances and the assembling correctness during assembling and the requirement on the detection of assembled products are satisfied, the labor is saved and the production efficiency is improved.

The invention provides a handheld dust collector which comprises a host machine, an air inlet, an air outlet, and a cyclone separation device connected with the host machine, wherein an air channel is formed between the air inlet and the air outlet; the cyclone separation device is vertically arranged, comprises a dust cup positioned at the lower part, and is used for separating dust and sundries in air flow flowing through the air channel; a plurality of convex columns are arranged at the bottom of the dust cup, so that the dust cup can be protected and is difficult to abrade. The handheld dust collector disclosed by the invention is simple and more compact in structure, and occupies a small space; the convex columns at the bottom of the dust cup can protect the dust cup and are difficult to abrade; the handheld dust collector is safer to use and has a good application prospect.

The invention discloses a delivery table in water for the obstetrics and gynecology department. The delivery table comprises a delivery table main body, a sitting stool, a base and a radio; the delivery table main body is installed on the top of the base, the sitting stool is horizontally installed at the lower end inside the delivery table main body, a cushion is horizontally installed in the portion, at one end of the sitting stool, inside the delivery table main body, a mounting base is installed in the portion, at the end, far away from the cushion, of the sitting stool, inside the delivery bed main body in an inclined mode, a backrest is installed on the inner side of the mounting base, and an organ air bag is installed between the mounting base and the inner wall of the delivery table main body. Accordingly, a shaking motor, a shaking rod, a gear, a hinged base, a transverse plate, a support rod and a connecting rod are installed, the shaking motor can be utilized for driving thegear to rotate, by means of rotation of the shaking rod, the transverse plate is driven to move left and right, and by means of swing of the support rod, the sitting stool is driven to do left-rightreciprocating motion; comfort is provided for parturition of puerperae, and parturition pain of the puerperae is relieved.

The invention discloses a constant volume type undisturbed soil strong collector and a using method thereof. The constant volume type undisturbed soil strong collector comprises a T-shaped lead screw, a pipe body (7) and a top anvil (4), wherein the top anvil (4) and the pipe body (7) are in multi-thread connection; the T-shaped lead screw consists of a handle (1) and a screw rod (2); the screw rod (2) on the T-shaped lead screw is in threaded connection with an internal screw hole (56) in the top anvil (4); a piston is arranged in the pipe body (7); the lower end of the pipe body (7) is connected with a drill bit (13). The collector adopts a split design, and each part can be flexibly detached and assembled, so that each functional part is conveniently intensified, a soil sample is conveniently collected and unloaded, the collector is particularly suitable for collecting samples containing gravelly soil, and the whole equipment is light, durable in use and easy to maintain. Moreover, the problems that the sampler is easily damaged when meeting gravels, the sample is difficultly unloaded and the original soil structure is difficultly kept in the sampling process in the prior art can be effectively solved.

The invention relates to cervical disc prosthesis, an implantable device, a cervical disc prosthesis and implantable device combination device and a method of implanting a cervical implant to cervical vertebra. The combination device comprises the cervical disc prosthesis and the implantable device, wherein the cervical disc prosthesis is composed of an upper endplate, nucleus pulposus and a lower endplate, the upper endplate and the nucleus pulposus form a ball and socket joint, and the nucleus pulposus and the lower endplate are in interference fit to form a cylinder fitting structure; the implantable device is composed of a clamping rod, a sleeve, a rotation handle and a stop pin, the clamping rod is sleeved inside the sleeve in an empty mode, the stop pin prevents relative rotation between the clamping rod and the sleeve, the rotation handle in rotation bolted connection onto the tail end of the clamping rod promotes relative axial movement generated between the clamping rod and the sleeve whose tail end is embedded inside the rotation handle fitting groove, the sleeve squeezes the clamping head of the clamping rod in the case of axial movement of the clamping rod, and relaxation and clamping of the prosthesis are realized through opening and closing of the clamping head.

The invention provides a compact type side rod control device based on man-machine working efficiency. A side rod handle is installed on a longitudinal rocker arm through a transverse rotating shaft, and the longitudinal rocker arm is installed on a side rod control device box through a longitudinal rotating shaft to form a universal connector type structure. The longitudinal rocker arm is connected with a longitudinal loading mechanism, a longitudinal damper pull rod and a longitudinal rod displacement sensor, wherein the longitudinal damper pull rod is connected with a longitudinal eddy current damper. A transverse output pull rod is connected to the root of the side rod handle and is connected with a transverse rocker arm. The transverse rocker arm is connected with a transverse loading mechanism, a transverse damper pull rod and a transverse rod displacement sensor, wherein the transverse damper pull rod is connected with a transverse eddy current damper. By means of a reasonable element arrangement mode, the size is compressed as much as possible, and the side rod control device is compact in structure and convenient to install.

The invention discloses a medical freed body moving platform which comprises a chassis assembly, wherein the chassis assembly is vertically provided with a stand column; the exterior of the stand column is movably connected with a stand column sleeve to carry out the heaving movement; the stand column sleeve is fixedly connected with a bracket; the chassis assembly comprises a chassis, a supporting leg and a gear driven by a motor; the supporting leg supports the chassis and is connected with the bottom of the chassis in a sliding way; a rack is arranged between the gear and the supporting let; the gear drives the rack to move; the supporting leg is fixedly connected with the rack; the bottom of the supporting leg is provided with a pulley wheel which is contacted with the ground; and the motor drives the supporting leg to slide by the gear, the rack and the pulley wheel. The medical freed body moving platform can stably hold up and move the bodies of patients, is slowly inserted into the underside of the human body after the panel is moved and regulated to the appropriate position, slowly holds up and move the body, is convenient to operate, effectively reduces the labor intensity of the medical personnel, has low cost, can be matched with all operational connecting stretchers and operational cars for using, and well solves the secondary harm problem caused by the movement of the patient body.

The invention discloses an underwater sample collector. The technical scheme of the invention is as follows: the underwater sample collector comprises a pipe body, the inside of the pipe body is provided with a piston structure matched with the pipe body, the lower end of an opening of the pipe body is a sample collecting hole, a lower valve plate is fixed on the inner wall of the pipe body at the upper part of the sample collecting hole, a limit stop is fixed on the inner wall of the pipe body at the upper part of the lower valve plate, the lower part of the limit stop is provided with a movable upper valve plate, a spring is fixed on the upper valve plate, a sphere is fixed at the lower end of the spring and can realize conduction and intercepting in cooperation with through holes on the upper valve plate and the lower valve plate, the pipe body at the upper part of the limit stop is provided with a sample outlet, the sample outlet is communicated with a sample collecting pipe, and the sample collecting pipe is provided with a one-way valve structure. The underwater sample collector disclosed by the invention is simple in structure and convenient and quick in application; and byusing the underwater sample collector disclosed by the invention, underwater samples such as sea cucumbers and fishes and the like can be absorbed conveniently without carrying out underwater operations by hands.

A locking and unlocking device of a central control unit of a folding bed comprises the central control unit. The central control unit comprises a shell (1) and a shell cover (2), the shell cover (2) covers the top face of the shell (1), a locating column (11) is vertically arranged in the middle of an inner cavity of the shell (1), and a metal locking sheet (12) is fixed to the top of the locating column (11). A vertically-communicated through hole (21) is formed in the middle of the shell cover (2), a buckle portion (2a) capable of rotating is arranged at the bottom of the shell cover (2), and the top of the buckle potion (2a) stretches out of the shell cover (2) through the through hole (21) to be connected with a pull portion which is arranged on the upper surface of the shell cover (2) and can pull the shell cover (2) to move upwards. A torsional spring (22) is arranged on the buckle portion (2a), and when the buckle portion (2a) moves downwards, the torsional spring (22) can enable the buckle portion (2a) to automatically rotate to be buckled with the bottom face of the metal locking sheet (12). Two buckle legs (23) capable of being buckled with the corresponding side edges (13) of the metal locking sheet (12) are arranged at the bottom of the buckle portion (2a). The locking and unlocking device has the advantages of being simple in structure, safe, reliable and good in locking effect and facilitating unlocking.

The invention discloses a bone marrow puncture needle. The bone marrow puncture needle comprises a needle body and a needle handle. The bone marrow puncture needle is characterized in that the needle handle is arranged at one end of the needle body; a puncture needle body is arranged at the other end of the needle body; handles are arranged on the two sides of the needle body; a puncture needle core is arranged in the puncture needle body; one end of the needle handle is connected with the puncture needle core; a switch valve is arranged at the other end of the needle handle; and a negative pressure bag is arranged on the switch valve. The bone marrow puncture needle brings convenience to force application, so that bone puncturing can be rapidly carried out and pains of patients are reduced. In addition, the bone marrow puncture needle is easy and convenient, time-saving and labor-saving in operation, so that workloads of medical workers are effectively reduced.

The invention discloses a gynecological and obstetric emergency midwifery device, and relates to the technical field of medical apparatus and instruments. The gynecological and obstetric emergency midwifery device comprises a midwifery forceps assembly and two knee bending angle adjusting assemblies. The two knee bending angle adjusting assemblies are symmetrically arranged on two sides of the midwifery forceps assembly and comprise support plates, first arc-shaped slide rail assemblies, second arc-shaped slide rail assemblies, linear slide rail components and spring connecting pieces, two vertical support columns are arranged at two ends of the bottom of each support plate, the vertical support columns at the ends, which are far away from human bodies, of the support plates are slidably connected with the first arc-shaped slide rail assemblies, the vertical support columns at the ends, which are close to the human bodies, of the support plates are slidably connected with the second arc-shaped slide rail assemblies, and the spring connecting pieces are arranged at the bottoms of the first arc-shaped slide rail assemblies and are connected with the linear slide rail components in a rolling manner. The gynecological and obstetric emergency midwifery device has the advantages that the gynecological and obstetric emergency midwifery device can effectively assist delivery women to carry out labor, and secondary injury of the delivery women can be reduced; labor postures can be adjusted by the gynecological and obstetric emergency midwifery device according to the body types and the leg lengths of the delivery women.

The invention provides to a nut huller, which relates to a daily life device and comprises two hollow semicircular casings, wherein each semicircular casing comprises an outer case, a built-in net, an inner case and a plurality of metal teeth, the outer case is a hollow hemispheroid and is made of soft materials, the outer case is covered outside the spherical surface of the built-in net, the built-in net is a hemispherical metal net, the inner surface of the metal net is fixedly connected with the metal teeth, the inner case is a hollow hemispherical body and is placed in the built-in net, fixing holes penetrating through the spherical surface of the inner case are arranged on the inner case , the arrangement mode of the fixing holes is the same as the arrangement mode of the metal teeth on the inner surface of the metal net, and the built-in net is sheathed with the inner case in a way that the metal teeth pass through the fixing holes. The nut huller has the positive effects that the appearance is small, exquisite and attractive, the nut hulling effect is good, the weight is light, the safety is good, and the carrying and the use are easy.

The invention relates to a charging device power module. The charging device power module comprises a heat dissipation assembly and a power assembly, wherein the heat dissipation assembly is arranged below the power assembly, and supports the power assembly; a front side, a back side, a left side and a right side of the power assembly are provided with a front panel, a mounting plate, a left side plate and a right side plate respectively; the left side, the right side and the back side of the power assembly are connected with the left side plate, the right side plate and the mounting plate respectively; an upper cover plate is arranged above the power assembly; the upper cover plate is connected with the upper ends of the mounting plate, the left side plate and the right side plate respectively; a front side and a back side of the heat dissipation assembly are connected with the front panel and the mounting plate respectively; and upper ends of a left side and a right side of the heat dissipation assembly are connected with lower ends of the left side plate and the right side plate respectively. The charging device power module has the advantages of small size, high capacity, high heat dissipation speed, low noise and high replaceability. Through adoption of a standard and integral module design, the charging device power module can be mounted and repaired conveniently and rapidly, and can be produced and assembled in batches; the production efficiency is increased effectively; and the reliable running and stability of a tramcar charging device are ensured.

The invention relates to an examination platform for ophthalmology departments, in particular to a convenient-to-adjust examination platform for the ophthalmology departments. The convenient-to-adjustexamination platform is characterized by comprising a base, a T-shaped slider, a first support tube, a first lifting rod, a first positioning screw rod, a first chair board, a support column, a largeworkbench and the like, wherein a first T-shaped sliding groove is formed in the left side of the top of the base, and the T-shaped slider is located in the first T-shaped sliding groove. The convenient-to-adjust examination platform has the advantages that the examination platform with a flexible structure can be adjusted conveniently, meet demands of different people, carry the different peopleeffectively and relieve burdens of operators, and is beneficial to examination and treatment of patients' eyes, simple in structure and convenient to use.

The invention discloses a geriatric rehabilitation exercise device. The geriatric rehabilitation exercise device comprises a base, wherein the left side of the top part of the base is fixedly connected with a substrate; a leftward position of the top part of the substrate is fixedly connected with a backrest plate; the right side of the top part of the substrate is fixedly connected with a seat; handrail stands are arranged at two sides of the seat. According to the geriatric rehabilitation exercise device disclosed by the invention, different using demands of a user can be met, the practicability is stronger, the back of the user can be pressed, and meanwhile, different positions of the back of the user can be massaged, so that the comfort level of using exercise equipment can be increased, the back fatigue of the user can be relieved, the back of the user can be fully in contact with the backrest plates under the action of a safety belt, the straightness of the back of the user can be increased, meanwhile, the compactness during massaging can be increased, and convenience is provided for the user to force; the geriatric rehabilitation exercise device is simple in structure and convenient to use, is more energy-saving and environment-friendly, is more convenient for the aged having difficulty in walking to do aerobic exercise, and the obstacle in walking of the aged having difficulty in walking is reduced.

The invention discloses a support for hole drilling and rebar planting of indoor building top and wall column side face and a hole drilling and rebar planting construction method thereof. The supportcomprises a first upright, a second upright and a four-connection-rod mechanism, and a tool mounting device is arranged at the end, close to the building top and the wall column side face, of a secondforce transmission rod; a turnplate a structure driving the turnplate to rotate and a structure enabling the turnplate to be located at a preset position are arranged at the end, close to the building top and the wall column side face, of the second force transmission rod, and a drilling tool mounting device, an electric air blower mounting device, a glue injector mounting device and a pneumaticfinger for mounting and rebar planting are sequentially and equally fixed at the edge of the turnplate along the circumference. The support is convenient to operate and high in construction efficiencyand safety. By adopting the support and the construction method, hole drilling, cleaning of dust in holes, glue injecting and rebar planting can be performed on the ground, so that time and physicalpower of operating personnel for getting on and off an operation frame or a herringbone ladder are saved in the whole process, and potential safety hazards and accidents caused by hole drilling operation on the frame or the ladder are avoided; the support is convenient to operate and high in construction efficiency and safety.

The invention relates to a split-type wrenching-type preservation box, comprising a box body and a box cover, wherein a fixed slot is arranged below the box cover, the fixed slot is provided with a seal ring, and the seal ring is sealed with the opening of the box body. The split-type wrenching-type preservation box is characterized in that the outer wall of the box body is provided with a connection block, the connection block is provided with a connecting slot, the connecting slot is internally provided with a wrench, the two ends of the wrench are provided with blocking tenons, the blocking tenons are movably connected with the connecting slot in the connection block, the wrench is provided with a clip, the box cover is provided with a fixed side, and the clip of the wrench is clamped and matched with the fixed side. The outer side of the box body is provided with the connection block, the connection block is provided with the connecting slot, the connecting slot and the wrench are connected, the wrench is independently injected and moulded, the two ends of the wrench are provided with the blocking tenons, and the wrench is arranged in the connecting slot of the box body by virtue of the blocking tenons, thus mounting is convenient, the generality is good, the blocking tenons and the connecting slot are connected in a rotating way by virtue of spindle and can not rebound or slip off, the influence of repeated rotation is avoided, the service life is long, the wrench and the box body or box cover are in a split structure, a die is easy to make, a demoulding mechanism is simple, the rejection rate is low, and the production efficiency is high.

A multifunctional obstetric bed that meets actual needs, including a backboard, a seat board, a handle, a base, an electric lifter, a backboard lifting system, a sewage hole, a leg support board and its cushion, and is characterized in that the backboard has two There is a reversible guardrail on the side, an inflatable airbag cushion and a foot pedal for the puerpera on the seat board, the airbag cushion is connected to the air pump through the trachea, and a sewage funnel is provided under the drain hole. The dirty bucket is arranged below the dirt funnel, the cushion is provided with a groove for the midwife to put the elbow, and the leg support is connected with the seat board by a rotating shaft and a fixed plate. The advantages are: to protect the safety of the parturient; it is beneficial for the parturient to use force; it can shorten the delivery time; it is beneficial for the midwife to deliver; The incidence of occupational diseases such as diseases. The invention is more in line with the needs of puerpera and midwives, and is suitable for use in obstetrics and gynecology departments of all hospitals.

The invention discloses a delivery assistor for gynaecology and obstetrics. The delivery assistor comprises a bottom plate, a rotating disc, supporting columns and base plates, a second storage cavityis formed in the base plate, an extending plate is slidably connected to the interior of the second storage cavity, storage grooves are formed in the two sides of the extending plate correspondingly,sliding blocks are slidably connected to the interiors of the storage grooves in the two sides, telescopic rods are rotatably connected to one sides of the upper ends of the sliding blocks on the twosides correspondingly, and threaded cylinders are in threaded connection with the upper ends of the telescopic rods on the two sides correspondingly. According to the invention, legs and feet of a pregnant woman can be supported in the delivery process of the pregnant woman, a force exerting point is provided for the pregnant woman, a pregnant woman can better exert force for parturition, meanwhile, under the condition that the pregnant woman exerts excessive force, support can be provided for the pregnant woman, the situation that parturition is affected when two legs are put down powerlessly is avoided, the device can be conveniently stored and detached after use, and the pregnant woman can get out of bed and move conveniently after parturition.

The invention provides a small easy-to-lift tool, and belongs to the field of articles and tools for daily life. The small easy-to-lift tool comprises a lifting handle, wherein two groups of lifting handle components are arranged at the bottom of the lifting handle at interval; two sunk grooves are formed in the bottom of the lifting handle at intervals, and each of the lifting handle components is arranged in the corresponding sunk groove; steady pins are connected to the lifting handle; the steady pins run through the sunk grooves and the lifting handle components; elastic components are additionally arranged between the lifting handle components and the lifting handle; and each of the elastic components comprises a left spring on the left side of the corresponding lifting handle component, a right spring on the right side of the lifting handle component and an upper spring which is arranged at the top of the lifting handle component. By virtue of the small easy-to-lift tool, heavy articles can be easily lifted, and a user can exert strength conveniently; and plastic bags in various sizes can be lifted, without a phenomenon of becoming loose or slip; therefore, the small easy-to-lift tool is quite practical.

The invention discloses a toothbrush capable of automatically outputting liquid toothpaste. The toothbrush comprises a toothpaste storing device, a toothbrush handle and a toothbrush head, wherein the toothpaste storing device comprises a storage pipe bag and a hollow toothpaste output pipe, one end of the toothpaste output pipe stretches into the storage pipe bag by 2-3 cm, and the other end of the toothpaste output pipe is of a dropper structure with diameter becoming smaller gradually; the toothbrush handle is a hollow cylinder arranged outside the storage pipe bag in a sleeving mode, a first through hole is formed in the toothbrush handle, and a check block and a spring are arranged in the first through hole; the toothbrush head is of an L-shaped structure, a cavity is defined inside the first right-angle side of the toothbrush head, multiple first toothbrush bristles and multiple hollow second toothbrush bristles are arranged on the first surface of the first right-angle side of the toothbrush head, and one ends of the second toothbrush bristles stretch into and are communicated with the cavity to form the toothpaste circulating path. By the adoption of the toothbrush, liquid toothpaste can be output from the toothbrush bristles by pressing the check block, operation is easy, and convenience and sanitation are realized.

The invention relates to the technical field of obstetric tables, and in particular, relates to an obstetric table capable of adjusting parturition posture. The obstetric table comprises a bed frame body, a bed plate body and a mattress body; top frame plates are L-shaped; the two top frame plates are symmetrically arranged mutually; a leg supporting frame is further mounted on the outer wall of each top frame plate; each leg supporting frame comprises an electric rotating table arranged on the outer wall of each top frame plate, one end of each electric rotating table is rotationally connected with a transverse rod, a vertical rod is perpendicularly arranged at one end of each transverse rod, a bearing rod is horizontally arranged at the top of each vertical rod, and a leg supporting plate is arranged at the top of each bearing rod. According to the obstetric table, a horizontal lying parturition position, a side lying parturition position, a sitting posture parturition position and astanding posture parturition position can be freely adjusted, parturient parturition is facilitated, meanwhile, in the parturition process, uterine contraction conditions can be conveniently observed, supporting points are provided for soles, and parturient leg force exertion in the parturition process is facilitated.

The invention discloses a medicine dispenser which comprises a cutter and a medicine cutting table. The cutter comprises a cutting head and a cutter handle, wherein the upper end of the cutting head is connected with the cutter handle, a circular cutting edge is arranged at the lower end of the cutting head, the lower end of the cutting head further comprises a circular groove and the outer edge, the circular groove surrounds the circular cutting edge externally and is clamped between the circular cutting edge and the outer edge, the upper end of the medicine cutting table is a concave circular truncated cone, the periphery of the circular truncated cone is surrounded by the round end, at least two spring clamps are arranged on the inner side of the circular end, and the circular cutting edge is surrounded by the outer edge and separated from the outer edge by the circular groove. When the medicine dispenser is used, tablets are put on the medicine cutting table, the tablets different in size and shape are fixed through a spring clamp, a user buckles the cutter and the medicine cutting table, and the circular end of the medicine cutting table is correspondingly embedded into the circular groove. Therefore, the circular cutting edge can completely cut off the tablets and divide the tablets into 2-6 equal parts as required.

The invention discloses a puller for a wiring pile, and belongs to tools used in an electric system. According to the puller for the wiring pile, a lever which is adjustable in height is hinged to the upper end of a stand column, a lifting end of the lever is connected with a pair of embracing pliers thorough two steel wire ropes, the pair of embracing pliers is composed of a pliers block I, a pliers block II and a pin bolt, the pliers block I, the pliers block II and the pin bolt are connected in a hinged mode, the inner end of the pliers block I and the inner end of the pliers block II are jaws which are used for tightly embracing the wiring pile, the two steel wire ropes are connected on two sides of the pliers block I and the pliers block II respectively, a cotter which is used for preventing the pin bolt from falling off is arranged on the pin bolt, and bayonet columns which can clamp the wiring pile are further arranged on the side face of the lever. By means of the puller for the wiring pile, the wiring pile can be easily pulled out, the problem that the wiring pile is difficult to pull out is solved, and damage to the wiring pile cannot happen.

The invention relates to a ground guiding wire traveling crane. The ground guiding wire traveling crane comprises a base, a seat body which is arranged on the base and a guard rail which is matched with the seat body, wherein two sides of the base are respectively provided with a traveling device and a braking device; the traveling device and the braking device are respectively provided with a first traveling wheel and a second traveling wheel. The ground guiding wire traveling crane has the following beneficial effects that firstly, newly developed equipment capable of traveling on a ground guiding wire is adopted to maintain the ground guiding wire, and the ground guiding wire traveling crane is simple in structure, reliable to use and high in safety; secondly, the ground guiding wire traveling crane is provided with the traveling device for traveling driving and the braking device capable of braking in time at any time, so that the purposes of quick and stable traveling and safety are achieved, the traveling crane also can be braked at the same time, the operation is simple and reliable, and the work efficiency is improved; thirdly, the ground guiding wire traveling crane is provided with the guard rail, so that the personal safety reliability of maintenance personnel is improved, forward bending and falling are prevented, and the ground guiding wire traveling crane is also beneficial to force-borrowing operation of the maintenance personnel by abutting against the guard rail and is beneficial to reducing the working strength of the maintenance personnel.

The invention discloses a novel bone marrow puncture needle which comprises a needle body and a needle core. The novel bone marrow puncture needle is characterized in that a handle is arranged on the needle body, wherein the front end of the needle body is a flat end, wall holes are formed in the side wall of the front end of the needle body, a needle core tip is arranged at the front end of the needle core; when the needle core is completely inserted to the needle body, the needle core tip is exposed outside the front end of the needle body; the needle core tip is in the shape of a rectangular pyramid; the needle core tip exceeds the front end of the needle body by 4 mm; the six wall holes are asymmetrically distributed in a position with a distance within 10mm from the front end of the needle body, and the diameters of the wall holes are 1.2mm. The novel bone marrow puncture needle is relatively convenient to apply force during operation, so that the working efficiency is improved and the pains of a patient are relieved. Due to the existence of the needle core tip, cortex of bone is not prone to enter the needle head to block a needle cavity, so that the success rate of the puncture is guaranteed; wall holes formed in the front end of the needle body can be used for extracting bone marrows on different positions, and therefore, the novel bone marrow puncture needle is beneficial to detecting out lesions.

The invention provides a lever tooth extraction apparatus which comprises a dental forceps, a lever shaft and a bracket. The dental forceps are hinged to each other through the lever shaft. Forceps heads of the dental forceps are bent vertically and downwardly. The forceps heads are clamped tightly front and back. The bracket includes a bottom plate and two vertical columns which are symmetrically fixed vertically at the two sides of the bottom plate. The two ends of the lever shaft are stretched out outwardly. The lever shaft is arranged between the two vertical columns horizontally and is rotatably arranged with itself being a rotating axis. When tooth extraction is carried out, forceps handles are arranged horizontally so that the forceps allows a force to be applied more conveniently. The forceps heads can be lifted through the lever shaft just by pressing the forceps handles and meanwhile a tooth can be pulled out. A dentist can applies a force more conveniently in a whole tooth extraction operation so that the tooth extraction can be carried out quicker and pain in a patient whom is suffered from the tooth extraction can be alleviated.

The invention discloses a handheld pencil sharpener. The hand-held pencil sharpener comprises a front cover, a shell, a tool core, an automatic pencil advancing mechanism, a handle, an inner gear, transmission teeth, a rack, a back cover and a torsional spring, wherein the shell comprises two parts; one part is used for accommodating a pencil sharpening mechanism, and the other part is a handheld part, thereby constructing a handle mechanism with the handle; a handle shaft is connected to the shell; the rack is fixed on the handle shaft; one end of the torsional spring is fixed on the rack, and the other end of the torsional spring is fixed on the handle; the rack is meshed with the transmission teeth; the transmission teeth are meshed with the inner gear; the inner gear is matched with the tool core; the automatic pencil advancing mechanism, the tool core, the inner gear and the transmission teeth are fixed in sequence in the shell; the lower side of the tool core is inserted into a scrap box; the front part of the shell is covered by the front cover, and the back part of the shell is covered by the back cover. The handle is held with a hand, the rack and the gear are driven through reciprocating pressing between the handle and the shell, and the tool core is driven to rotate for sharpening a pencil, so that a user can apply force easily, force is saved, and convenience is brought to operation.

The invention relates to a locking catch block, which comprises a keel and a cushion block. The middle of the upper part of the keel is provided with a convex rib with a barb part and convex ribs distributed on two sides of the convex rib with the barb part, at least one inserting groove is formed on the keel, the cushion block consists of a main body part which has equal height with a keel cube and an inserting tenon matched with the inserting groove on the keel, and the inserting tenon on the cushion block is inserted in the inserting groove on the keel. In a fixer used with the locking catch block, one side of a block body is provided with a left groove, a right groove and a middle groove which are matched and sleeved with the left convex rib, the right convex rib and the middle convex rib of the keel respectively; and the left groove and the right groove are provided with flanges. The locking catch block can conveniently assemble a plurality of wood floor blocks together, the assembly is convenient and simple, and the wood floor is not easy to deform after assembling.

The invention discloses a wheelchair capable of assisting people in standing. The wheelchair comprises a chair frame, wherein support plates are mounted on the left and right sides of the chair framein a front-back sliding manner; supporting mechanisms are arranged in the supporting plate in a bilateral symmetry mode. An auxiliary mechanism is arranged in the chair frame. According to the invention, the wheelchair is provided with a seat capable of being overturned, so that an upward force can be provided when a person on the wheelchair wants to stand up; meanwhile, the armrests on the two sides of the wheelchair can slide to the front of the body and extend out of the supporting rod for supporting the ground, force can be exerted more conveniently during supporting, pedals of the wheelchair can be retracted backwards when the armrests slide forwards, and enough space is reserved for standing.