37results about How to "Won't come out easily" patented technology

The invention relates to a magnetic suspension bearing system, in particular to a protective bearing device with sliding blocks for eliminating a clearance. The protective bearing device comprises a supporting assembly and a driving piece; the supporting assembly is arranged at the outer periphery of a rotor in a clearance manner; the supporting assembly comprises a built-in piece and at least twosliding blocks; a sliding groove communicating with the rotor is formed in the built-in piece; the at least two sliding blocks are circumferentially distributed in the sliding groove and slide in thesliding groove in an inclined direction with the axis of the rotor; when the sliding blocks slide in the sliding groove, the inner ends of the sliding blocks are connected with or far away from the rotor; arc grooves with the axial depths gradually changing are formed in the end faces, positioned at the groove opening of the sliding groove, of the sliding blocks; the driving piece provides synchronous axial pushing force for the at least two sliding blocks; and the driving piece is rotatably connected with the built-in piece, and is provided with insertion columns which correspond to the arcgrooves one by one and are inserted into the arc grooves. The problem that a protective bearing device in the prior art cannot automatically protect the rotor under the condition of power failure is solved.

The invention relates to a quick-release zipper, which comprises a left zipper tape, a right zipper tape, an upper stopping assembly and a zipper slider, wherein the upper stopping assembly comprises left and right upper stopping pieces which are arranged at the left and the right, and the right upper stopping piece comprises a right upper stopping main body inserted into the zipper slider; the axial extension length of the right upper stopping main body is not less than the length of the zipper slider, and a bulge capable of preventing the zipper slider from separating is arranged at the top of the right upper stopping main body; an outer convex arc part is arranged on the side in the right upper stopping main body, and the highest point of the outer convex arc part is positioned at the middle or middle lower area of the inner side of the right upper stopping main body; the outer side of the right upper stopping main body extends to the top end direction from the tail end in a smooth way, and the left upper stopping piece comprises a left upper stopping main body which can be accommodated by the zipper slider; and the axial extension length of the left upper stopping main body accommodated by the zipper slider is less than the length of the zipper slider. The invention also discloses clothes using the quick-release zipper. The lower stopping assembly is positioned at the upper part of the clothes, and the upper stopping assembly is positioned at the lower part of the clothes. With the characteristics and advantages, the invention can be applied to the upper stopping assembly of the quick-release zipper and the clothes.

The invention relates to a yarn bobbin package which comprises a plurality of lining plates. The upper surface of each lining plate is provided with a plurality of first grooves, and the lower surface of each lining plate is provided with second grooves which are identical with the first grooves in number and in one-to-one correspondence with the first grooves. The first grooves are communicated with the second grooves in a one-to-one vertical alignment mode. Each lining plate is provided with through holes identical with the first grooves in number. The lining plates are overlapped in sequence, yarn bobbins to be packaged are fixed between every two adjacent lining plates, the upper ends of the yarn bobbins to be packaged are embedded into the second grooves of the upper lining plates, and the lower ends of the yarn bobbins to be packaged are embedded into the first grooves of the lower lining plates, so that the whole package is formed. According to the yarn bobbin package, the defect that in a traditional mode, yarn bobbins collide with one another and consequently the yarn quality is affected due to the fact that the yarn bobbins deviate from positions in the transporting process is overcome; it is ensured that the yarn bobbins are firmly stored in the whole package, the packaging efficiency and the yarn bobbin transporting efficiency are improved, transportation losses are lowered, and the transportation cost is reduced; the yarn bobbin package is simple in structure and low in cost.

The invention discloses a safe and convenient threaded fastener assembling tool. The safe and convenient threaded fastener assembling tool comprises an outer cylinder, a supporting ring, a nut anti-rotation device and a clamping ring, wherein the supporting ring, the nut anti-rotation device and the clamping ring are arranged in an inner cavity of a cylinder body of the outer cylinder. According to the safe and convenient threaded fastener assembling tool, a nut, an elastic pad and a flat pad are arranged in the tool in advance, so that the nut, the elastic pad and the flat pad form a whole before being arranged in a bolt, the problems that the flat pad, the elastic pad and the nut are scattered and possibly fall off during assembling under various occasions, various angles and various conditions are solved, assembling is safe, efficient, convenient and fast, and the safe and convenient threaded fastener assembling tool is particularly suitable for the situation that the bolt needs tovertically penetrate through a workpiece from top to bottom, and the flat pad, the elastic pad and the nut need to sequentially penetrate through the bolt from bottom to top; and the safe and convenient threaded fastener assembling tool can adapt to fasteners of different specifications, and the tool applicability is good.

The invention discloses a Beidou-based power transmission line galloping monitoring system. The Beidou-based power transmission line galloping monitoring system comprises a controller, and an acceleration sensor which is fixedly connected with a body, and the acceleration sensor is electrically connected with the controller; the system further comprises the body, the upper portion of the body is fixedly connected with a hoop structure, and a fixing hole of the hoop structure matches a wire; the system further comprises a Beidou communication module which is fixedly connected with the body, andthe Beidou communication module is electrically connected with the controller; the system further comprises a 5G module which is fixedly connected with the body, and the 5G module is electrically connected with the controller; the system further comprises a storage battery which is electrically connected with the controller, the acceleration sensor, the 5G module and the Beidou communication module, and a cloud server which is in wireless connection with the Beidou communication module. The problems of low detection efficiency and high detection cost in the prior art are solved.

The invention provides an anti-loose tire bolt which comprises a screw and a nut. The nut is provided with a movable washer; a flange is formed in an end of the nut; the movable washer is sleeved on the flange and is an open spring washer; the flange comprises a small-diameter section, a large-diameter section and an end section; the spring washer is rotatably sleeved on the small-diameter section; the outer diameter of the small-diameter section and the outer diameter of the end section are smaller than the inner diameter of the spring washer, the outer diameter of the large-diameter section is larger than the inner diameter of the spring washer, and a convenient oblique plane is formed on an end surface of the large-diameter section, so that the spring washer can be conveniently sleeved on the thin-diameter section via the convenient oblique plane. A structure form of the traditional anti-loose tire bolt is broken through, a middle hole of the spring washer corresponds to the convenient oblique plane during assembly, and the spring washer is conveniently pushed through the large-diameter section by the aid of the convenient oblique plane under the effect of stamping force of a machine, and is sleeved and limited on the small-diameter section. Compared with the prior art, the anti-loose tire bolt has the advantages of simplicity in assembly process, simple, novel and reasonable structure, excellent service performance and long service life.

The invention discloses a locking structure of an electronic device, which is used for locking a cover body of the electronic device to a shell outer frame. The locking structure comprises the cover body, the shell outer frame and a pressing body, wherein a clamping hook is formed on the cover body; the shell outer frame is provided with an end wall and a connecting wall; the connecting wall is fixedly connected to the shell outer frame, and a section of cut section parallel to the shell outer frame extends; the connecting wall is provided with a clamping hole; the pressing body is provided with a butting block; the cover body is arranged on the shell outer frame; the clamping hook is clamped into the clamping hole; the pressing body is matched with the cut; the butting block is sleeved into the clamping hole and butts the clamping hook; and the butting block pushes the clamping hook to separate from the clamping hole by pressing the pressing body so as to make the cover body opened relatively to a body. The locking structure of the electronic device makes the cover body stably locked relatively to a shell and is convenient for opening the cover body.

The invention provides a plasticizer cable hidden wire storing device and method based on external connection wires, and relates to the field of electric power. The plasticizer cable hidden wire storing device based on the external connection wires comprises a wire storing plate, wherein semi-arc transverse grooves are formed in the front face of the wire storing plate at equal intervals, rotary path turnover mechanisms are welded to the middles of the inner walls of the semi-arc transverse grooves correspondingly, wire bending winding assemblies are installed on the two sides of wire windingplates correspondingly, the bottoms of the wire winding plates are fixedly connected with transverse wire passing assemblies correspondingly, and the back faces of the middles of the bottom faces of the wire winding plates are connected with overturning termination mechanisms through rubber belts correspondingly. According to the device, the wire winding plates drive stored plasticizer cables to turn over to inner cavities of the semi-arc transverse grooves, so that the cables are hidden after being stored, meanwhile, the wire winding plates do not occupy a large space area after being storedin the semi-arc transverse grooves, and after the cables are hidden, and the hidden cables are conveniently and reversely rotated through the rotary path turnover mechanisms, the effect of the plasticizer cables after being stored is ensured.

The invention relates to a stone cage and a stone cage slope protection device with same. The stone cage comprises a main body with openings and a plurality of strengthen separators. The strengthen separators are matched with the openings, and are used to cover a cover plate of the main body and are located in the main body to separate the internal space of the main body. The device combines casesin the field of actual engineering experience, design aesthetics, ecological environment protection, international, national and local standards, production and construction technology to make a comprehensive balance to form a reliable and reasonable gabion engineering product. The development of the device solves many practical problems encountered in related projects of strengthening the stability of a large-angle slope protection structure, optimizing the landscape effect of a slope protection project, ensuring the ecological and biological nature of a natural slope protection site, and carrying out quality and standardized control of the production of engineering prefabricated products. The device can be widely applied to various types of construction engineering, municipal engineering and other fields.

The invention relates to a handle with adjustable rope length and fitness and sports equipment with the handle. The handle comprises a handle body; the handle body is connected with one end of a rope;the handle body comprises a housing; it is characterized in that the handle body also comprises a screw type rope length adjusting device which is installed inside the housing; the screw type rope length adjusting device comprises an internal shaft and a cylindrical spiral body; the cylindrical spiral body is hollow inside for accommodating the internal shaft; a housing cover is used as a rotating turn button for driving the internal shaft to rotate about the cylindrical spiral body; a slide block structure is installed between the internal shaft and the cylindrical spiral body; the slide block structure is connected with one end of the rope; the slide block slides along with the rotation of the internal shaft in the spiral chute of the cylindrical spiral body for adjusting the length ofthe rope. The handle also comprises a rotating switch which controls the internal shaft in a rotating state or a lock state with respect to the cylindrical spiral body.

The invention discloses a diamond grinding block and a manufacturing method thereof. The diamond grinding block comprises a clamping seat, a base body and a tool bit; the tool bit is bonded to the upper surface of the base body, and a groove is formed in the lower surface of the base body; a protruding block is arranged on the upper surface of the clamping seat; the protruding block is provided with two oppositely-arranged first side faces, and the first side faces incline towards the protruding block from top to bottom and incline towards the protruding block from front to back; and the groove is provided with two opposite second side faces, the protruding block is suitable for being assembled in the groove, and the first side faces are suitable for abutting against the second side faces.A method for manufacturing the diamond grinding block comprises the following steps of evenly mixing powder of a transition layer and powder of a working layer; putting the base body, the transitionlayer and the working layer into a mold cavity of a mold according to a sequence or a reverse sequence; placing the mold on a hot press to complete bonding of the tool bit and the base body; releasingthe mold; and assembling the base body bonded with the tool bit on the clamping seat. The diamond grinding block has the advantages that the production process is simple, the mounting and dismountingare convenient, the clamping base can be repeatedly used and the diamond grinding block is economical and environmentally friendly.

Provided is a split and simply-assembled type electric roof sunshade curtain. The split and simply-assembled type electric roof sunshade curtain is characterized in that a sliding groove and synchronous belt grooves are formed between a left side rail and a right side rail, a sliding block is arranged in the sliding groove and fixed to a curtain body, synchronous belts are arranged in the synchronous belt grooves and matched with the sliding block, the two ends of the side rails are provided with two front motor connecting bases and two back motor connecting bases respectively, a plug is arranged at one side of each motor connecting base, a synchronizing wheel is arranged in each motor connecting base, a limiting base is installed on the upper portion of an end cover arranged on each motor connecting base, an opening is formed in the lower portion of each end cover, each limiting base is internally provided with a self-locking rotary knob, a self-locking block piece is arranged on the inner wall of each self-locking rotary knob, a poke piece is arranged below each self-locking rotary knob, a cover plate is arranged on one side of an upper cover arranged on the outer wall of each limiting base, an upper clamping plate and a lower clamping plate are arranged on the other side of each upper cover, motors are arranged in the upper covers at the front ends of the left side rail and the right side rail, self-locking baffles arranged on the outer walls, located on one sides of output shafts, of the motors are matched with the self-locking block pieces of the self-locking rotary knobs, connecting shafts are arranged in the synchronizing wheels of the back end motor connecting bases of the left side rail and the right side rail, telescopic rod sleeves and transmission shafts are arranged in the upper covers at the back ends of the left side rail and the right side rail, the transmission shafts are inserted into the telescopic rod sleeves, and springs are arranged on the outer walls of the transmission shafts inside the telescopic rod sleeves.

The invention discloses a component of an elevator landing door system, and particularly relates to an elevator rope sheave which comprises a rope sheave body. An arc rope circular groove is formed in the outer side wall of the rope sheave body, and rope limit convex rings are symmetrically arranged at the opening of the arc rope circular groove. The elevator rope sheave achieves the technical purpose that after the elevator rope sheave and an elevator rope are matched, the elevator rope can not fall out of the arc rope circular groove of the elevator rope sheave under the loosening condition. Matching stability of the elevator rope sheave and the elevator rope is effectively improved, and operation performance of the whole elevator landing door system is improved; meanwhile, due to the fact that a nylon covering layer is arranged on the surface of the arc rope circular groove and the nylon material has good noise reduction performance, noise is avoided when the elevator rope sheave is used in the elevator landing door system.

The invention relates to the technical field of bio-medical apparatuses, and in particular discloses a cell scraper capable of rotating within 180 degrees. The cell scraper comprises a scraper handle(1) and a scraper head (2), wherein an inclined plane (3) is arranged at one end of the scraper handle; a rotating pillar (4) and a limiting strip (5) are arranged on the inclined plane from outer endto inner end; the scraper head comprises a blade (6) and a connecting plate (7) which is arranged on the blade; an arc-shaped groove (8) is formed in the connecting plate; an arc-shaped block (9) isarranged at one side of the arc-shaped groove in the connecting plate; the arc-shaped block is combined with the arc form of the arc-shaped groove, so that a through hole (10) is defined; the rotatingpillar is rotatably arranged in the through hole; an end, which partially exceeds the arc-shaped block, is arranged at the end of the connecting plate; and a stopping strip (11), which interacts withthe limiting strip, is formed on the part, exceeding the arc-shaped block, of the connecting plate. The cell scraper provided by the invention has the characteristics of being convenient in angle adjusting, relatively wide in angle change range, convenient to operate and relatively good in collection effect.

A handle capable of adjusting rope length, a fitness and sports equipment having the handle. Said handle comprises a handle body (1), the handle body (1) being connected to one end of a rope (2), and the handle body (1) comprising a housing (11), characterized in that the handle body (1) further comprises a spiral rope length adjusting device provided inside the housing (11). The spiral rope length adjusting device comprises an inner shaft (13) and a cylindrical spiral body (12), the inside of the cylindrical spiral body (12) being hollow to accommodate the inner shaft (13), and a housing cover (114) serving as a rotary knob to drive the inner shaft (13) to rotate relative to the cylindrical spiral body (12); a slider structure (18) is provided between the inner shaft (13) and the cylindrical spiral body (12), the slider structure (18) is connected to one end of the rope (2), and the slider structure (18) slides, along with rotation of the inner shaft (13), in a spiral groove of the cylindrical spiral body (12), so as to adjust the length of the rope (2). Said handle further comprises a rotary switch (15), the rotary switch (15) controlling the inner shaft (13) to be in a rotatable state or a locked state with respect to the cylindrical spiral body (12).

The invention provides a zipper slider and a pull head using the same. The zipper slider is used to be matched with a zipper piece to form the pull head, and comprises a slider body and an elastic sheet, wherein a zipper-piece stop block and a groove are arranged on the slider body; one end of the zipper-piece stop block is connected with the slider body, and the other end of the zipper-piece stop block is positioned above the groove and is spaced from the sidewall of the groove to form a gap through which a pull rod of the zipper piece is allowed to pass; the distance from the bottom surfaceof the other end of the zipper-piece stop block to a wing plate on the slider body is less than the diameter of the pull rod of the zipper piece; and one end of the elastic sheet is fixed on the slider body, and the other end of the elastic sheet is inserted in the gap between the zipper-piece stop block and the sidewall of the groove so as to stop the pull rod of the zipper piece. The zipper slider and the pull head using the same have the advantages of simple structure and easy operation.

The invention discloses a connector, a lattice unit cell and an assembled lattice structure, and the connector comprises a first connecting part and a second connecting part. One of the two connecting parts is provided with a protruding part, the other connecting part is provided with a connecting groove, and the protruding part is connected with the connecting groove to enable the first connecting part to be connected with the second connecting part; the protruding part comprises an extrusion part and a necking part, and the extrusion part is connected with the necking part; the connecting groove comprises a first connecting groove body and a second connecting groove body which communicate with each other, the second connecting groove body is open towards the side away from the first connecting groove body, and when the extrusion part moves from the opening to the first connecting groove body, the extrusion part extrudes the groove wall of the second connecting groove body; and when the extrusion part is connected with the first connecting groove, the necking part is connected with the second connecting groove. According to the connector, the protruding part is arranged on one connecting part, the connecting groove matched with the protruding part is formed in the other connecting part, the protruding part and the connecting groove are matched so that the connecting strength of the first connecting part and the second connecting part can be improved, and the structure is stable after the connector is connected.

A mask is used for solving the problem that an existing electronic mask is high in material consumption, and comprises: a mask body; a mask part that is provided with a wrapping space defined by the mask part; a bag part that is on the mask part and having a containing chamber.

The invention provides a kelp culture jig and float integrated jig for improving the culture density, which belongs to the technical field of kelp culture, and includes a device main body, a protrusion, a fixing hole, an insertion groove, a through groove, an insertion groove, an operation panel, a handle, a spring, Closing plate, device auxiliary body, groove, float, spring coil, connecting plate, fixing nail, threaded protrusion, stirring plate and nut, the upper and lower ends of the left side of the main body of the device are fixedly connected with protrusions, and the right side of the device auxiliary body The upper and lower ends of the surface are nested with grooves, and the protrusions and grooves are snap-fitted. The left surface of the main body of the device and the right surface of the auxiliary body of the device are both nested with fixing holes. The front surface of the main body of the device and the auxiliary body of the device Embedding grooves are provided through each of them, one side surface of the embedding groove is nested with a through groove, and the through groove and the fixing hole are arranged through, and the outer surface of the main body of the device and the outer surface of the auxiliary body of the device are nested with an insertion groove.

The invention discloses an indoor high-end router with an external cable collecting and limiting mechanism, the indoor high-end router comprises a high-end router body, a shielding plate, an electric motor, a cleaning block and a removing block, sucker feet are fixed on the lower surface of the high-end router body through bolts, and a ventilation net port is fixed on the upper surface of the high-end router body through bolts. A fixing frame is fixedly adhered to the lower surface of the high-end router body, a winding rod is fixedly adhered to the front surface of the high-end router body, and a cable body insertion port is formed in the front surface of the high-end router body. The indoor high-end router with the external cable collecting and limiting mechanism is provided with a winding rod and a clamping groove, through the arrangement of the winding rod, cables with redundant lengths can be collected, and through the clamping groove, the shielding plate fixes the wound cables, so that the cables are not easy to fall off after being wound, the cleanliness of the interior of the weak current box is ensured, and meanwhile, the condition that the cables are wound together and are inconvenient to overhaul is also reduced.

The invention discloses a fastening type surge protector. The invention comprises a surge protection module; the outer contour of the surge protection module adopts a cylindrical shape design; Four elastic limit plates are evenly arranged in the circumferential direction of the module; a pinch plate is provided on the surge protection module between the two adjacent elastic limit plates; There are pull rods; the pull rods are connected to four elastic limit plates in the surge protection module; four threaded rods are arranged on the lower end surface of the surge protection module; The cooperation between the elastic limit plate and the limit groove and the cooperation between the threaded rod and the threaded hole can strengthen the connection strength between the surge protection module and the base, so that the module has better fixation and stability after being inserted into the base. It will not come out easily, increasing its safety performance.

The invention relates to the technical field of mechanical arms, and discloses a man-machine interactive humanoid mechanical arm, which includes a mounting shaft, a movable joint and two mounting shafts, the two mounting shafts are fixedly connected to the mounting shafts, and the mounting shaft and One end of the installation shaft away from the movable joint is fixedly connected, and the other end of the installation shaft that is not connected to the installation main shaft is provided with an installation ring, and the installation ring is fixedly connected with the installation shaft. The tightening mechanism and the clamp set are used in conjunction with other device structures. The locking mechanism enables quick and convenient connection between the connecting seat and the mounting ring. The design of the clamp set allows it to clamp round or square objects. , can be freely changed to the corresponding shape according to the shape of the object, and at the same time, the structure in the clamp group can also make the device cool down when the device is clamping the high-temperature object, prolonging the service life of the device.

The invention relates to a magnetic suspension bearing system, in particular to a sliding block eliminating clearance and protecting a bearing device. It includes: a support assembly, the clearance of the support assembly is set on the outer periphery of the rotor, the support assembly includes a built-in part and at least two sliders, a chute communicating with the rotor is opened in the built-in part, and at least two sliders are circumferentially distributed on the slide and slide in the chute in the direction inclined to the rotor axis, when the slider slides in the chute, the inner end of the slider is in contact with or away from the rotor; the slider is located at the notch of the chute There is an arc groove with gradually changing axial depth on the end face; the driving part, the driving part provides synchronous axial driving force for at least two sliders, the driving part is rotatably connected with the built-in part, and the driving part is equipped with an arc The slots correspond one-to-one and insert the stakes. The problem that the bearing protection device in the prior art cannot automatically protect the rotor in the case of power failure is solved.

Disclosed is a fast release zip fastener (6) comprising: a left zip tape (4), a right zip tape (5), an upper stopping assembly (9) and a zip slider (1). The upper stopping assembly (9) comprises left and right upper stoppers (2, 3) provided on the left and right, wherein the right upper stopper (3) comprises a right upper stopping main body (31) capable of being inserted into the zip slider, and the right upper stopping main body (31) is such that the axial extension length thereof is no less than the length of the zip slider (1). The top of the right upper stopping main body (31) is provided with a protrusion (32) capable of blocking the zip slider from coming loose. A convex arc-shaped part (33) is provided on an inside edge (310) of the right upper stopping main body, the highest point of the convex arc-shaped part is located in a region of a mid-portion or a mid-lower portion inside the right upper stopping main body (31), and an outside edge (37) of the right upper stopping main body extends from a tail end (301) towards a top end (302) in a smooth shape. The left upper stopper (2) comprises a left upper stopping main body (21) capable of being received inside the zip slider (1), wherein the axial extension length of the left upper stopping main body (21) received inside the zip slider (1) is less than the length of the zip slider (1). Further disclosed is clothing (7) using the fast release zip fastener (6), wherein a lower stopping assembly (8) is located at the upper part of the clothing (7), and the upper stopping assembly (9) is located at the lower part of the clothing (7). Since the fast release zip fastener has the above-mentioned features and advantages, for this reason, these can be applied to the upper stopping assembly of a fast release zip fastener and in clothing.

The invention relates to a yarn bobbin package which comprises a plurality of lining plates. The upper surface of each lining plate is provided with a plurality of first grooves, and the lower surface of each lining plate is provided with second grooves which are identical with the first grooves in number and in one-to-one correspondence with the first grooves. The first grooves are communicated with the second grooves in a one-to-one vertical alignment mode. Each lining plate is provided with through holes identical with the first grooves in number. The lining plates are overlapped in sequence, yarn bobbins to be packaged are fixed between every two adjacent lining plates, the upper ends of the yarn bobbins to be packaged are embedded into the second grooves of the upper lining plates, and the lower ends of the yarn bobbins to be packaged are embedded into the first grooves of the lower lining plates, so that the whole package is formed. According to the yarn bobbin package, the defect that in a traditional mode, yarn bobbins collide with one another and consequently the yarn quality is affected due to the fact that the yarn bobbins deviate from positions in the transporting process is overcome; it is ensured that the yarn bobbins are firmly stored in the whole package, the packaging efficiency and the yarn bobbin transporting efficiency are improved, transportation losses are lowered, and the transportation cost is reduced; the yarn bobbin package is simple in structure and low in cost.

The invention discloses an anti-vibration type surge protector. The anti-vibration type surge protector includes a surge protection module. The outer contour of the surge protection module is designedby adopting a cylindrical shape. Four elastic limit plates are equidistantly and evenly arranged on the outer side wall surface of the surge protection module along a circumferential direction of thesurge protection module. A buckle plate is arranged on the surge protection module between each two adjacent elastic limit plates. A pull rod is arranged on the upper end face of the surge protectionmodule. The pull rod is connected to the four elastic limit plates in the surge protection module. Four threaded rods are arranged on the lower end face of the surge protection module. The anti-vibration type surge protector enhances the connection strength between the surge protection module and the base through the cooperation between the buckle plates and buckle grooves, the cooperation between the elastic limit plates and limit grooves and the cooperation between the threaded rods and threaded holes, and so the module has better fixability and stability after being inserted into the baseand cannot easily move out, which increase the safety performance of the surge protector.

The invention discloses a safe syringe. The safe syringe comprises a needle cylinder, a piston and a needle, wherein an injection end communicated with the interior of the needle cylinder is arranged at the upper end of the needle cylinder, the piston is sleeved with the needle cylinder, the needle is fixedly arranged on the injection end through a needle base, the center axis of the injection end is not coaxial with the center axis of the needle cylinder, and a limiting groove is formed in the inner side wall of the injection end. After drug injection is finished with the safe syringe, the needle can be bent in the needle cylinder, so that secondary recovery is avoided and staff infection caused by stabbing or scratching of the needle is avoided during syringe collection.

The invention discloses an arc isolation structure of a contactor. The arc isolation structure comprises a first shell which is used for installing auxiliary static contacts, a second shell which used for installing primary static contacts and multiple arc isolation plates. The opening of the first shell is downward. The second shell is accommodated in the first shell. The middle segment of the second shell is provided with a moving contact component. The second shell is provided with multiple chambers of which the openings face the moving contact component so as to providing matching of primary moving and static contact points in the chambers. The arc isolation plates are inserted in the corresponding chambers of the second shell from the openings of the chambers along a horizontal direction and form isolation of the side walls of the chambers. When the second shell is matched with the first shell, the second shell presses the arc isolation plates in a clamping way from above so that the arc isolation plates are enabled not to withdraw out of the chambers from the openings of the chambers along the horizontal direction. The arc isolation structure of the contactor has the characteristics of being simple in structure, low in cost and easy to assemble and especially reduces the assembling difficulty.