41results about How to "Reduced operating proficiency requirements" patented technology

The invention discloses an injection mould with rapidly-replaced mould cores. The injection mould is composed of a movable mould and a stationary mould, wherein a main body of the movable mould is composed of a movable mould base and a movable mould core movably arranged on the movable mould base; a main body of the stationary mould is composed of a stationary mould base and a stationary mould core movably arranged on the stationary mould base; the butt joint faces of the movable mould base and the stationary mould base are respectively provided with a mould core mounting sliding chute which horizontally extends from front to back; at least the front ends of the mould core mounting sliding chutes are provided with plug-in mounting holes for mounting or dismounting the mould cores; the mould cores are provided with tracks matched with the mould core mounting sliding chutes so as to move along the mould core mounting sliding chutes; and the mould cores are inserted to or dismounted from the mould core mounting sliding chutes on the mould bases through the plug-in mounting holes, thus the mould cores are replaced. According to the invention, only one set of mould base needs to be manufactured to be matched with the mould cores of different cavities which are manufactured according to spline standards tested based on different performance indexes; the mould replacing operation is easier and more convenient than that of the prior art, so that the mould replacing time is greatly shortened; and the manufacturing cost of various test spline moulds can also be greatly reduced.

The invention relates to a HPLC (high-performance liquid chromatography) detection method capable of simultaneously detecting contents of six amino acids in a donkey-hide glue blood-supplementing preparation. The method comprises the following steps: providing a donkey-hide glue blood-supplementing preparation sample; providing an amino acid standard sample; respectively adding the donkey-hide glue blood-supplementing preparation sample and the amino acid standard sample into phenylisothiocyanate-acetonitrile solution; uniformly mixing and standing, and respectively adding n-hexane; uniformlymixing and standing once again, respectively extracting lower-layer solutions, and filtering to obtain a derivatized donkey-hide glue blood-supplementing preparation sample solution and a derivatizedamino acid standard sample solution; sucking the derivatized donkey-hide glue blood-supplementing preparation sample solution and the derivatized amino acid standard sample solution, and injecting into a liquid chromatograph to perform amino acid detection. According to the invention, the contents of six major amino acids in the donkey-hide glue blood-supplementing preparation are detected by adopting reversed-phase high-performance liquid-phase, the sample treatment method is simple, the detection method has good specificity, repeatability and accuracy, and the internal quality of donkey-hide glue blood-supplementing granules can be well controlled.

The invention discloses a method for measuring the content of amino acid in a black-bone chicken milk increasing preparation. The method comprises the following steps: subjecting a black-bone chicken milk increasing preparation to a protein hydrolysis treatment; and then using an amino acid analyzer to analyze the hydrolysate so as to measure the amino acid content. In the conventional standards, the protein content can be only represented by total nitrogen content, the provided method can overcome the shortage, moreover, the method can precisely measure contents of 17 amino acids in the preparation, has the advantages of simple pretreatment, strong specificity, good repeatability, and high precision, can well control the quality of the black-bone chicken milk increasing preparation, and improves the safety and effectiveness of the preparation.

The invention discloses a micro thermoelectric module and a production method thereof. The production method includes the following steps: acquiring a thermopile with a sandwich structure, wherein the thermopile comprises a first electrode layer, a second electrode layer and a staggered P-N type thermoelectric sheet array sandwiched between the first electrode layer and the second electrode layer, and processing separating grooves on the thermopile to form multiple thermoelectric units of the array. Compared with the prior art, the micro thermoelectric module and the production method thereof have the advantages that integration of thermopile manufacture and electrode connection processing can be realized only through a precise gas cutting machine, and electrode micro-processing procedures in the prior art are omitted, so that needed equipment and process cost are reduced, requirements on worker operating proficiency are low, and convenience is brought to mass production.

The invention discloses a conicity measuring instrument comprising a pedestal, and a fixed rod, a measuring rod and a dial arranged on the pedestal; the dial is provided with a pointer; the pointer is connected with the measuring rod through a link rod in a rigidity manner; the measuring rod is hinged to the pedestal; the conicity measuring instrument is simple in structure, strong in economical property, low in making cost, simple and easy in operation principle, and needs no professional personnel to operate; the conicity measuring instrument is simple and fast in operation, thus improving the conicity measuring efficiency; the conicity measuring instrument is easy to dismount and mount, low in maintenance cost, and easy and convenient in operations.

The invention relates to a method for measuring the content of an amino acid in an amino acid chromium complex. The method comprises the following steps: (1) adding an inorganic acid solution into a weighed amino acid standard product, thereby preparing a standard solution; (2) adding the inorganic acid solution into a weighed amino acid chromium complex test sample to be tested so as to dissolve the sample, thereby obtaining a test sample solution; (3) respectively performing high performance liquid chromatography on the standard product solution and the test sample solution, thereby obtaining the content of the amino acid in the amino acid chromium complex by using an external standard method, wherein the analysis conditions are that a C18 liquid phase chromatographic column is adopted as a chromatographic column, and a phosphate solution is adopted as the flow phase. The method for measuring the content of the amino acid in the amino acid chromium complex is simple in sample pretreatment process, simple and convenient to operate, capable of rapidly measuring the content of the amino acid in amino acid chromium complex and relatively high in sensitivity, accuracy, stability and reproducibility, and a reliable and effective method is provided for quality detection on the amino acid chromium complex.

The invention discloses an injection mould capable of being easily de-molded. The injection mould is formed by a movable mould and a fixed mould, which are used as the injection mould, wherein each one of the movable mould and the fixed mould comprises a molding part, a pushing-out mechanism, a mould guide part and a pouring system; a mould cavity is arranged in the mould; the mould cavity is arranged on the mould closing face of the single injection mould, namely, the mould cavity is arranged on the mould closing face of the movable mould or the mould closing face of the fixed mould; the mould closing face of the other injection mould has no mould cavity and is a plane; the movable mould and the fixed mould are closed to form the complete injection mould cavity. According to the injection mould disclosed by the invention, the structure of only arranging the mould cavity on the single injection mould is applicable to injection of a standard test sample strip or an injection piece with the similar shape. The injection mould has the beneficial effects of being beneficial to simplification of the structure of the mould, improving the manufacturability of the mould and reducing the cost of the mould.

The invention relates to a method for detecting the content of Danshensu in Fuyankang tablets, which comprises the following steps: 1) preparing a sample solution to be measured of Fuyankang tablets; 2) drafting a standard curve of a comparison product solution of Danshensu; 3) injecting the obtained sample solution to be measured of Fuyankang tablets in a step 1) into a liquid chromatograph for chromatogram determination of Danshensu in Fuyankang tablets; 4) calculating the content of Danshensu in Fuyankang tablets according to the chromatogram of the obtained sample solution to be measured in a step 3) and the standard curve of the comparison product solution of Danshensu. The high performance liquid chromatography (HPLC) detection method for detecting the Danshensu content in Fuyankang tablets has advantages of simple sample treatment method, exclusive test method, good repeatability and high accuracy, and has significance, for controlling the product quality of the Fuyankang tablets.

The invention relates to optical measuring system and method for cell perforation. A cell culture dish and a reflecting mirror are arranged on a three-dimensional moving platform; a 642nm laser deviceis arranged on the horizontal right side of the reflecting mirror; an objective lens, an A dichroscope, a B dichroscope, a C dichroscope and a photoelectric detection device are sequentially arrangedright under the three-dimensional moving platform; two focusing lenses are arranged in the horizontal rightward direction of the A dichroscope; laser devices are arranged on the sides of the focusinglenses and the dichroscopes and are connected with a delay device; and a high-speed camera is arranged on the right side of one dichroscope and is connected with the photoelectric detection device are connected with a digital signal processor (DSP) processing system. The method comprises the steps of culturing a cell in the cell culture dish, and adding nanometer gold and a voltage-sensitive dye;using the laser devices for continuously irradiating the cell and exciting the voltage-sensitive dye; using the high-speed camera for acquiring an image; and calculating and drawing a variation trendof a cell span membrane potential through the DSP processing system. According to the optical measuring system and the method for cell perforation provided by the invention, the cell can be recoverably perforated at low cost.

The invention provides a mixed polyurethane crosslinked foam material and a preparation method thereof and relates to the technical field of foam materials. The mixed polyurethane crosslinked foam material comprises, by weight, 20-95 parts of mixed polyurethane, 5-80 parts of a vinyl copolymer, 0.1-5 parts of a crosslinker, and 0.5-15 parts of a foaming agent, and the mixed polyurethane has Mooneyviscosity of 10-150. The technical problem is solved that existing cast polyurethane foam material has defective regions, poor elasticity, high compressive permanent deformation and poor shrinkage; the mixed polyurethane and the vinyl copolymer are crosslinked and foamed under the action of the crosslinker and the foaming agent; the process is controllable, and pores are uniformly distributed; the prepared mixed polyurethane crosslinked foam material has low density, good elasticity, good wear resistance and slip resistance, low compressive permanent deformation, good shrinkage resistance, and excellent comprehensive performance, and can effectively meet the requirements of various fields.

The invention relates to the technical field of medical instruments, in particular to a special tool for keratoprosthesis. The special tool comprises a handle and a mounting tool head; the mounting tool head comprises a first trepan disposed on the handle and used for drilling tissues in a mount. According to the special tool, the mounting tool head disposed on the handle comprises the first trepan. During usage of the special tool, a surgeon holds the handle by hand, inserts the first trepan into the mount and drills the tissues in the mount. The special tool is simple to operate, has low requirement on operational skillfulness of the surgeon and allows visualization of the tissues in the mount, advantages are made for following mounting of a cylindrical lens, the cylindrical lens is mounted accurately, and therapeutic effect is guaranteed.

The invention discloses a push-out limiting mechanism and a display screen module. The push-out limiting mechanism comprises a first mounting component and a second mounting component, wherein the first mounting component comprises a first mounting seat, an inserting piece and a first elastic piece, the inserting piece is arranged on the first mounting seat, and the first elastic piece is used forenabling the inserting piece to elastically run on the first mounting seat; the second mounting assembly comprises a second mounting seat, an inserting seat and a second elastic piece, wherein the inserting seat is arranged on the second mounting seat in a sliding mode, and the second elastic piece is used for being connected with the second mounting seat and the inserting seat; the inserting piece is perpendicular to the moving direction of the inserting seat; the inserting piece is provided with a first inserting part, and the inserting seat is provided with a second inserting part matchedwith the first inserting part. The push-out limiting mechanism has good buffering and traction effects; the push-out limiting mechanism is arranged in the display screen module, so that the safety ofdisassembly and assembly of the display screen body can be guaranteed, and the accidental falling of the display screen body in the disassembling and assembling process is avoided.

The invention relates to the technical field of medical apparatuses and instruments, and provides a limb traction device which comprises a traction seat used for fixing a limb of a patient and provided with a mounting via hole and a rotating hole, and the rotating hole and the mounting via hole are arranged at an interval and communicate through a mounting window; the basic shaft is arranged in the mounting through hole in a penetrating manner and is provided with a rack extending in the axial direction of the basic shaft; the driving mechanism comprises a rotating shaft rotationally connected into the rotating hole, a driving gear fixed to the rotating shaft and a clutch locking mechanism arranged on the rotating shaft; the driving gear is positioned in the rotating hole and is meshed with the rack through the mounting window; the clutch locking mechanism is matched with the traction seat, has a locking state and an unlocking state, and is provided with a driving end for receiving driving force; in the locking state, the clutch locking mechanism is in limiting fit with the traction seat to limit rotation of the rotating shaft; when the driving end receives driving force, the clutch locking mechanism and the traction seat are separated from limiting fit to be switched to an unlocking state, so that the rotating shaft drives the driving gear to rotate, and the traction seat is driven to slide along the basic shaft.

The invention discloses an integrated full-automatic direct driving roller car and a control method thereof. The roller car comprises a roller car body, and the roller car body is provided with a mainshaft mechanism, a presser foot lift mechanism, a needle bar swinging mechanism, an upper rolling wheel clutch mechanism and a lower reverse sewing mechanism; an electric control box is disposed on the side face of the roller car body and internally provided with an MCU control module and a motor driving module, the main shaft mechanism is connected with a servo motor, and the MCU control modulecontrols the servo motor to run through the motor driving module; the electric control box is connected with an operation box which is internally provided with a touch screen. According to the integrated full-automatic direct driving roller car and the control method thereof, full-automatic control is achieved, and the efficiency is improved; through an integrated design of a motor, an electric control part and a machine head, the structure is simplified, and the installation difficulty is reduced; electromagnets are adopted as driving components, the roller car is compact in structure, flexible to control and low in noise; the touch screen is introduced for participating in control, and control parameters are set easily and conveniently.

The invention discloses a set for taking out an anastomosis clamp which comprises a taking-out cap, a taking-out hook and an anastomosis clamp, wherein the taking-out cap is suitable for being installed at the front end of an endoscope, the outer diameter of the taking-out cap is smaller than the inner diameter of the anastomosis clamp, and the taking-out hook can penetrate through the taking-out cap and hook the anastomosis clamp; when the taking-out hook is pulled out backwards, the anastomosis clamp can be arranged on the periphery of the taking-out cap in a sleeving mode so that the closed anastomosis clamp can be reset. When the taking-out hook is used for pulling out the anastomosis clamp, the taking-out cap can open the anastomosis clamp to enable the front end spine of the anastomosis clamp to loosen the tissue, so that the tissue is protected from being damaged when the anastomosis clamp is taken out, the requirement for the operation proficiency degree of an operator is greatly reduced, and multiple clamping operations can be carried out until the optimal clamping position is found.

The invention discloses an injection mould with rapidly-replaced mould cores. The injection mould is composed of a movable mould and a stationary mould, wherein a main body of the movable mould is composed of a movable mould base and a movable mould core movably arranged on the movable mould base; a main body of the stationary mould is composed of a stationary mould base and a stationary mould core movably arranged on the stationary mould base; the butt joint faces of the movable mould base and the stationary mould base are respectively provided with a mould core mounting sliding chute which horizontally extends from front to back; at least the front ends of the mould core mounting sliding chutes are provided with plug-in mounting holes for mounting or dismounting the mould cores; the mould cores are provided with tracks matched with the mould core mounting sliding chutes so as to move along the mould core mounting sliding chutes; and the mould cores are inserted to or dismounted from the mould core mounting sliding chutes on the mould bases through the plug-in mounting holes, thus the mould cores are replaced. According to the invention, only one set of mould base needs to be manufactured to be matched with the mould cores of different cavities which are manufactured according to spline standards tested based on different performance indexes; the mould replacing operation is easier and more convenient than that of the prior art, so that the mould replacing time is greatly shortened; and the manufacturing cost of various test spline moulds can also be greatly reduced.

The invention discloses a micro thermoelectric module and a manufacturing method thereof. The manufacturing method includes the following steps: obtaining a thermoelectric pile with a sandwich structure, wherein the thermoelectric pile includes a first electrode layer, a second electrode layer, and a layer sandwiched between the two. An array of P and N-type thermoelectric sheets alternately arranged in between; and a plurality of thermoelectric units in which grooves are processed on the thermoelectric pile to form an array. Compared with the prior art, the present invention combines thermopile fabrication and connection electrode processing into one, and only requires a precision cutting machine to complete the process, eliminating the electrode micro-machining steps usually required by the prior art. In this way, all work can be reduced. It requires equipment, reduces process costs, has low requirements on personnel's operating proficiency, and is easy to produce in large quantities.

This utility model relates to the field of scanning equipment technology, and in particular to a quick-change battery compartment structure. The technical solution includes a scanner body and a locking block connected to the bottom of the scanner body. A battery slot is provided at one end of the scanner body near the locking block, and a battery is installed inside the battery slot. It also includes a slot at the end of the scanner body near the locking block, and a locking groove is provided inside the slot. This utility model utilizes the cooperation of a positioning pin, a locking head, a button, and a spring. When installing the battery, the battery is placed in the battery slot of the scanner body, the positioning pin of the locking block is inserted into the positioning groove, and pressing causes the locking head to engage with the slot, thus securing the battery. When replacing the battery, the button is pressed against a hard object to disengage the locking head from the slot, and then both hands can be used to separate the scanner body and the locking block, allowing the old battery to be removed or placed in. No special tools are required during the process, making the operation simple and quick, greatly simplifying the steps and reducing the skill requirement.

The invention provides a gas chromatographic column and a preparation method used for the separation of volatile gas arsenic compounds, which belongs to the field of chemical detection technique and is used for solving the problem that the normal chromatographic column is not suitable for the separation of volatile gas arsenic compounds. The technical proposal of the invention is that the chromatographic column body is a flexible PTFE column body and the filling material is a power-shaped polysiloxane stationary phase of 80-100 meshes. The filling material is filled by a blowing positive-pressing filling method. The invention can meet the specific requirement of the separation of the gas arsenic compounds and has the advantages of strong plasticity, easy cutting, being convenient for being bent and good adaptability, can bear the low temperature of minus 196 DEG C and the high temperature of 200 DEG C, has outstanding performance of chemical corrosion resistance, and can realize the butting with collecting devices and detection devices conveniently. The blowing positive-pressing filling method provided by the invention has the advantages of convenience, simpleness, low requirementon the operation skillfulness, etc., with the filling density, column effect and repeatability completely meeting the separation requirement of the gas arsenic compounds.

The invention discloses a quick dismounting and replacing device for a belt body, and relates to the field of belt body conveying equipment. The device comprises a base, a connecting assembly, a quick dismounting mechanism, conveying mechanisms, a locking mechanism and a belt body; the conveying mechanisms are arranged at the two ends of the base correspondingly, and the belt body is installed at the edges of the two conveying mechanisms; the connecting assembly is installed on the top face of one end of the base; the quick dismounting mechanism is mounted on the top surface of the conveying mechanisms; the quick dismounting mechanism is movably connected with the connecting assembly through a guide screw; and the locking mechanism is arranged between the end, provided with the quick dismounting mechanism, of the base and the corresponding conveying mechanism. The locking mechanism is used for replacing an original manual tensioning device, and the tightness of the bottle clamping belt body is adjusted to be consistent; and the quick dismounting mechanism can prevent an elastic piece from rebounding in the belt body replacing process, it is guaranteed that the belt body is smoothly replaced, and operation is convenient.

This invention provides a paper-splitting device and a wet wipe folding machine. The paper-splitting device includes a main support frame with two paper-splitting assemblies arranged in parallel on the main support frame. Each paper-splitting assembly includes a drive shaft and a driven shaft arranged parallel to each other vertically, and multiple paper-splitting annular belts tensioned around the drive shaft and the driven shaft. Each paper-splitting annular belt is spaced apart along the axial direction of the drive shaft and engages with the drive shaft. Each paper-splitting annular belt is provided with a first paper-splitting arm. The first paper-splitting arms in the two paper-splitting assemblies together form a first support platform for the wet wipes. The drive shafts of the two paper-splitting assemblies can be driven to rotate synchronously and in opposite directions, so that the height of the first support platform can be raised or lowered. This invention provides more accurate height control and adjustment of the wet wipes supported on the first support platform, simplifies operation, reduces the operator's skill requirements, and lowers the operator's labor intensity.

The invention discloses a small hand-held intelligent detection device and a method facing the mechanical connection hole of an aircraft. The equipment includes: an outer frame structure, a camera assembly, a guide rail slider device, an information processing display module, and a leveling structure; the camera assembly is fixed on the leveling structure, and the leveling structure is fixed on the guide rail slider On the device, the guide rail slider device is fixed on the outer frame structure, and the information processing display module is connected with the camera assembly. The device simplifies the detection operation, reduces the size and is convenient to hold, can be operated on the assembly frame, and can detect mechanical connection holes on different aircraft structural parts.

The invention discloses small handheld intelligent detection equipment and method for a mechanical connecting hole of an airplane. The equipment comprises an outer frame structure, a camera assembly,a guide rail slide block device, an information processing display module and a leveling structure. The camera assembly is fixed to the leveling structure, the leveling structure is fixed to the guiderail slide block device, the guide rail slide block device is fixed to the outer frame structure, and the information processing display module is connected to the camera assembly. The equipment simplifies detection operations, reduces the size, is handheld conveniently, can be operated on an assembled rack and can be used for detecting the mechanical connecting holes in different airplane structural parts.

The buckle limiting structure comprises a limiting pipe body suitable for a boosting pipe of the support imbedding device to penetrate through, one axial end of the limiting pipe body is provided with an external thread, and the other axial end of the limiting pipe body is provided with a movable sleeve suitable for being connected with a fixed rotary knob in an abutting mode; the movable sleeve is of a tubular structure formed by buckling at least two buckles, and the outer end of each buckle is in flexible connection with the limiting pipe body so that the buckles can turn over relative to the limiting pipe body. The buckle limiting structure is in threaded fixation with the handle, the buckle limiting structure serves as a middle adapter of the boosting tube and the fixed knob, the movable sleeve is used for abutting against the fixed knob, and the movable sleeve can be formed by buckling a plurality of buckles and can be detached, so that threaded connection of the fixed knob and the handle can be improved into sliding connection; when the support needs to be released, only the movable sleeve needs to be detached, the releasing speed is high, and operation is convenient.

The invention provides a construction method of a prefabricated concrete socket rainwater pipe. The construction method comprises the steps that firstly, a pipe body is horizontally placed; secondly, a sealing ring is installed on the end face of the small end of the second pipe body; thirdly, the first lifting lug of the second pipe body is lifted through a lifting hook; fourthly, a second pipe body is hoisted to the first pipe body, and the installation mode is that the small head of the second pipe body is placed in the lower half large head of the first pipe body from top to bottom, the position of the small head is adjusted, the small head is located in a groove in the bottom of the lower half pipe, and the second pipe body is installed on the second pipe body. The end of the small head abuts against the inner side end face of the groove in the bottom of the lower half pipe. Fifthly, the second lifting lug of the first upper half big head is lifted through a lifting hook; and sixthly, the first upper half large head is installed on the lower half large head of the first pipe body. The pipeline can be placed from top to bottom, balance adjustment is not needed, installation is easy, the working efficiency is improved, workers needing to be matched are reduced, and cost is saved.

The invention relates to a method for separating and purifying a mercaptosuccinic acid. The method comprises the following steps: taking a raw product of the mercaptosuccinic acid as the raw material,extracting by using an organic extracting agent, filtering, evaporating a solvent in a filtrate to obtain the purified mercaptosuccinic acid; wherein the boiling point of the organic extracting agentis 75-200 DEG C, the relative volatility with n-butyl acetate at the temperature of 25 DEG C is 0.5-4.5, and the organic extracting agent is slightly soluble or insoluble in water. The method efficiently separates the inorganic salt and other byproducts produced in the preparation process, a product of the mercaptosuccinic acid with the purity higher than 99 wt% is obtained, the method not only treats a primary reaction solution obtained in the preparation of the mercaptosuccinic acid through alkali hydrolysis, but also purifies the raw product of the mercaptosuccinic acid obtained in other ways, and the applicability of the method is strong.

The embodiment of the present application discloses a graphics adjustment method, device, device and storage medium, which relate to the technical field of electronic whiteboards, and include: displaying graphics on a canvas; displaying a first writing track in response to a first writing operation received, The first writing track represents a target geometric attribute, and the target geometric attribute includes a length parameter and / or an angle parameter; the graphic is adjusted so that the target geometric attribute is the geometric attribute of the adjusted graphic. The above-mentioned method can solve the technical problem in the prior art that graphics cannot be adjusted accurately and simply.

The invention discloses a clamping and fixing mechanism of an overlocking machine, which comprises a sliding rail erected on a machine table, a mounting base plate is arranged on the sliding rail in a sliding manner, a left clamping arm and a right clamping arm are arranged on the mounting base plate, a first longitudinal sliding rail and a first telescopic cylinder are arranged on the mounting base plate between the left clamping arm and the right clamping arm, and a second longitudinal sliding rail and a second telescopic cylinder are arranged on the mounting base plate between the left clamping arm and the right clamping arm. A positioning pressing plate is installed at the lower end of a sliding block of the first longitudinal sliding rail. After the pillow is fixed left and right through the left clamping arm and the right clamping arm, the positioning pressing plate is controlled by the first telescopic cylinder to press the side edge, to be sealed, of the pillow, the pillow is prevented from loosening, and meanwhile the side edge, to be sealed, of the pillow is in a flat state; in addition, a laser calibration device located above the auxiliary clamping mechanism is arranged on the rear side of the sliding rail. A laser guide line emitted by the laser calibration device is projected on the workbench below, so that an employee can be guided to find an accurate pillow fixing position, the requirement on the operation proficiency of the employee is reduced, and the accuracy and efficiency of subsequent sealing and binding-off can be improved.

The invention discloses a main hand operating wrist of a master-slave robot, relates to the main hand operating wrist, and aims to solve the problems that a mechanical arm of a main hand end in the prior art is relatively small in working space, not high in flexibility, lack of force and moment of force feedback information, great in mechanism, lack of sense of force, low in space utilization rate, limited in application occasion, not flexible to operate, complex to operate, incapable of realizing force balance of any position of the mechanical arm, great in load for a doctor to drive the main hand to operate, and fatigable. The main hand operating wrist comprises an arm connector, a first wrist joint assembly, a second wrist joint assembly, a third wrist joint assembly, a fourth wrist joint assembly and a clamping mechanism connector, wherein the first wrist joint assembly comprises a first driver, a first motor, a first shaft coupler, a first shaft, a first absolute type angle encoder, a first housing and two first bevel gears. The main hand operating wrist is used for the field of medical robots.