89results about How to "With reset function" patented technology

The invention relates to an inserting type modular steel structure connecting joint with a reset function. The inserting type modular steel structure connecting joint comprises a modular steel structure connecting joint body and self-reset haunch supports, wherein the modular steel structure connecting joint body comprises two upper module units, two lower module units, a cross-shaped inserting pin connecting piece, a vertical cover plate, a horizontal cover plate and high-strength bolts, and the four self-reset haunch supports internally provided with disc springs are symmetrically arranged at the corner parts of the joint body and are hinged to module beam columns. According to the inserting type modular steel structure connecting joint, module units are connected through the cross-shaped inserting pin connecting piece, the cover plate and the high-strength bolts, so that it is guaranteed that the joint has enough tensile strength, shear strength and bending strength, a connecting device has no need occupying the use space of a building, the application range is wide, and meanwhile attractiveness is guaranteed; and the arrangement of the self-reset haunch supports can improve thebearing capacity of the joint, delay degradation of the rigidity and strength of the joint, reduce damage to the joint beam-column intersection, avoid premature damage to components, achieve rapid repair and guarantee stability and reliability of the joint performance, and residual deformation after an earthquake is small.

The invention discloses a leaning-preventing electric portable drill facilitating drilling depth control. The leaning-preventing electric portable drill comprises an electric portable drill body, a handle is arranged below the side of the electric portable drill body, a switch key is arranged on the side face of the handle, a horizontal rail groove is formed in the bottom of the electric portabledrill body, a U-shaped top plate standing on the side is arranged at the bottom of the electric portable drill body, a second sliding way is arranged on a top horizontal face of the U-shaped top plate, the rail groove is in sliding fit with the second sliding way, and therefore the electric portable drill body can horizontally slide on the U-shaped top plate, and a supporting plate is arranged atan opening of the side face of the U-shaped top plate. The leaning-preventing electric portable drill has the beneficial effects that the U-shaped top plate is attached to the surface of an object, and therefore a drill bit is perpendicular to the object all the time when the electric portable drill body drills a hole, and drill bit breaking or hole leaning is avoided; and the position of a positioning plate is adjusted, a sliding plate is limited, and the hole drilling depth is accurately controlled.

The invention provides an assembly device for an engine turbine. The assembly device comprises a cylinder body, a bracket disk, a positioning ring and an annular plate, wherein the cylinder body is mounted on a turbine rotor shaft through two bearing devices and can rotate relative to the rotor shaft; the bracket disk is perpendicular to the cylinder body and is fixedly arranged on the cylinder body which is close to one end of the turbine rotor; the positioning ring and the cylinder body are coaxially and fixedly arranged on the bracket disk, and the inner diameter of the positioning ring is used as a mounting radial location reference of a guider; the annular plate is positioned at the outer end of the positioning ring, and the end surface, which is butted to a case of the guider, of the annular plate is used as a mounting axial positioning base of the guider. The cylinder body is mounted on the rotor shaft through the two bearing devices, wherein one bearing device which is close to one end of the turbine rotor is provided with a radial fine tuning structure, and the other bearing device is provided with an axial fine tuning structure; the bracket disk is provided with measuring holes for measuring the distances between front edges of blades. Through the adoption of the assembly device, the precise adjustment of the axial position relation and the radial position relation of a turbine rotor and the guider can be realized, and the assembly of the turbine belt guider and the level by level dynamic equilibrium of the turbine belt guider are realized, so that the assembly precision and the assembly reliability of the turbine belt guider are improved.

The invention discloses a state indicator with a gap line surge arrester, relating to the lightning-proof protection device. The invention has a structure which is as follows: an energy taking part (1) is connected in series on an earth wire of the arrester, a low-current counting circuit (2) and a high-current counting circuit (3) as well as an alarm indicating circuit (4) are respectively connected with corresponding terminals of the energy taking part (1) to obtain energy; the high-current counting circuit (3) is connected with the alarm indicating circuit (4) and provides a switch control signal for the alarm indicating circuit (4); the alarm indicating circuit (4) is connected with an alarm indicating mechanism (5) and controls the alarm indicating mechanism (5) to operate; a clear mechanism (6) of a counter is connected with the high-current counting circuit (3) to realize the zero clearing. The state indicator is an inactive component and has practicability and economical efficiency as well as long service life and strong visibility, and is suitable for the on-line monitoring of the MOX arrester with a gap line with a voltage of 35 or more than 35 kV.

The invention discloses an active safety pillow device for an automobile, which comprises a height adjusting mechanism and a safety mechanism, wherein the height adjusting mechanism is provided with a horizontal supporting rod, and a vertical supporting rod and a vertical height adjusting rod which are fixed with the horizontal supporting rod, and a revolving mechanism of the height adjusting mechanism is arranged on the horizontal supporting rod and can rotate relative to the height adjusting mechanism; the safety mechanism is arranged on the revolving mechanism, can rotate along with the revolving mechanism, and is provided with a framework and a ratchet mechanism arranged in the framework; and the ratchet mechanism comprises a pawl supported on the framework and a ratchet wheel which is fixed with the revolving mechanism, and pawl teeth on the pawl and ratchets on the ratchet wheel can be engaged or disengaged mutually. The device can effectively protect head and neck when a car accident occurs, and adjust a pillow to a position where a passenger feels comfortable according to requirements of a human body. Through the revolving mechanism and the framework safety mechanism, the pillow can ensure that the pillow closely contacts the head and neck of the passenger and generates the follow-up supporting force on the head and neck when the automobile is crushed so as to protect the head and neck from damage.

The invention provides a semi-solid single-point waving prevention device which comprises a cover, a piston and a base, wherein the cover, the piston and the base are sequentially arranged on the same axis in parallel. The semi-solid single-point waving prevention device is characterized in that an outer barrel is arranged on the base, the piston located in the outer barrel is connected with the cover through a piston rod, a spring is arranged between the cover and the base and located on the outer side of the outer barrel, and silicon oil is arranged in the outer barrel. Compared with the prior art, the semi-solid single-point waving prevention device is good in waving prevention performance, can effectively restrain waving of an electric transmission line under ice wind shock excitation, is simple in structure and easy to mount, can be matched with a sub conductor spacer, and is good in economic performance and suitable for large-scale popularization and use.

The invention discloses an anti-collision device of a multi-stage falling-proof beam. The device consists of a sliding limiting system and a connecting system which are sealed inside a casing system, wherein the sleeve system is formed by welding a fixed end sealing plate, a sliding end sealing plate and a steel sleeve; the sliding limiting system is formed by serially connecting a sliding system I, a sliding system II and a limiting system; the sliding system I is formed by welding a first stage sliding block, an outer connecting rod and an inner connecting rod; the sliding system II is formed by welding a second stage sliding block, an inner sliding steel tube, a limiting block and an outer sliding steel tube in sequence; the limiting system is composed of a tension and compression spring and a steel strand; and the connecting system is composed of a fixed end connector, a connecting sleeve and a sliding end connector. The anti-collision device is installed at an expansion joint of a bridge so as to connect bridge components at the two ends of the expansion joint; the anti-collision device is simple to manufacture, convenient to install and clear in stress mechanism; and the phenomenon that a main beam is dissociated from an abutment because of an earthquake and the problem that adjacent connected main beams collide to each other are effectively prevented.

A self-resetting piezoelectric semi-active friction damper comprises a shell and sleeves, wherein the shell comprises a top cover and a small box. One end of each sleeve is arranged on a base at the bottom of the small box, the other end of each sleeve is arranged on a top seat below the bottom of the top cover, a certain gap is reserved between the top seat and the other end of the corresponding sleeve, piezoelectric ceramic drivers are placed in the sleeves, leads of the piezoelectric ceramic drivers extend out of the damper through small grooves in the side faces of the sleeves and long and narrow hole grooves in the side walls of the small box and are connected with an external power supply, gaskets are arranged at two ends of each piezoelectric ceramic driver, a baffle is fixed to one side wall of the small box through a fixing screw, pre-pressure is applied by pre-tightening screws on the top cover, a balancing pull rod penetrates the baffle and is connected with the outer wall of the left sleeve, a connecting pull rod is fixed to the left side wall of the small box through a hexagonal nut, an actuating pull rod penetrates one side wall of the small box and is connected with the right sleeve, and reset springs are arranged on the balancing pull rod and the actuating pull rod respectively. A control system of the self-resetting piezoelectric semi-active friction damper is simple, the performance of the piezoelectric ceramic drivers is stable, the pre-pressure is conveniently applied, output energy is less, power output is high, and a piston can automatically reset.

The invention discloses a restoration fixing frame in the orthopedics department. The restoration fixing frame in the orthopedic department comprises a first fixing rod and a second fixing rod, wherein the first fixing rod is rotatably connected with the end, close to the first fixing rod, of the second fixing rod, and the first fixing rod is fixedly provided with two first fixing blocks; the bottom of each first fixing block is provided with two first bolts which are connected with a first clamping plate in a threaded mode, the first clamping plate is located at one side of the first fixing blocks, and each first fixing block, the first clamping plate and the corresponding two first bolts are fastened and connected with a first bone round needle; one end of the first fixing rod is fixedly connected with a gear, and the second fixing rod is fixedly provided with two second fixing blocks; the bottom of each second fixing block is provided with two second bolts which are connected with a second clamping plate in a threaded mode, the second clamping plate is located at one side of the second fixing blocks, and each second fixing block, the second clamping plate and the corresponding two second bolts are fixedly connected with a second bone round needle. The restoration fixing frame in the orthopedic department has the advantages of being reasonable in structure and simple to operate, has a restoration function, and can freely adjust a fixing angle.

The invention provides a failure latching and resetting system of a power converter. The failure latching and resetting system comprises a state latching circuit, a failure analysis circuit, a control circuit and a reset signal circuit, wherein the state latching circuit receives a state signal of the power converter, latches the state signal and outputs a corresponding intermediate signal; the failure analysis circuit judges whether the corresponding state signal is a failure signal according to the intermediate signal, and outputs a judgment signal; the control circuit controls the turn-on and turn-off of the power converter according to the state of the judgment signal and outputs a driving control signal; and the reset signal circuit outputs a reset signal to the state latching circuit under the condition that the state of the judgment signal and the state of the driving control signal are in accordance with a preset state. The invention also provides the power converter. By adoption of the technical scheme provided by the invention, the failure signal of the power converter can be latched, and the failure latching and resetting system has a resetting function, so the operation of the power converter can be automatically recovered, a power switching tube is prevented from being frequently turned on and turned off, the service life of the power converter is prolonged, and the reliability and maintainability of the power converter are improved.

The invention provides a refrigerator. The refrigerator comprises a collecting circuit, a controller, a voice control circuit and a play circuit. The collecting circuit is used for collecting parameter information of the refrigerator. The controller is connected to the collecting circuit and judges whether a fault or an error exists in the refrigerator according to the parameter information, wherein if yes, the fault information or the error information is sent to the voice control circuit. The voice control circuit is connected to the controller and receives the fault information or the error information sent by the controller, determines the target voice content corresponding to the fault information or the error information and sends the target voice content to the controller. The play circuit is connected to the controller, receives the target voice content sent by the controller and plays the target voice content. Correspondingly, the invention further provides a voice prompt method for the refrigerator. According to the technical scheme, a user can directly judge the fault of the refrigerator according to the voice content, and the using experience of the user is enhanced.

The invention relates to a reliable pressure-relief and antibump apparatus of a low-voltage draw-out switch cabinet, wherein the apparatus has a simple structure; and the operation of the equipment is safe according to the invention. The apparatus has a cabinet body. A plurality of unit cells are arranged in the cabinet body; longitudinal pressure-relief channels are arranged at two sides of the cabinet body; the pressure-relief channels are communicated with pressure-relief devices in the unit cells, wherein the pressure-relief devices comprises pressure-relief baffles that are installed on separator boards of the unit cells and active pressure-relief baffles that are installed on the pressure-relief baffles actively. According to the invention, an articulated form is applied to a structure design, so that the pressure-relief and antibump apparatus is flexible and reliable when the apparatus is opened and closed. The apparatus is composed of sheet metal workpieces and self-tapping screws and has good craftiness. In addition, the apparatus has unique design concept and a blank of the low-voltage switch cabinet product can be filled in the aspect. Therefore, the apparatus provided in the invention has high popularization application value.

The invention relates to a manual regulator for the positioning aperture. The manual regulator for the positioning aperture comprises a bottom platform, a first support, a first roll, reset springs, a first pulling rope, a second support, a pulling wheel, a second pulling rope, a third support, a second roll and a rocking handle, wherein the first roll is installed on the first support; the reset springs are installed on the left and right portions of the first roll; the lower portion of the second support is in sliding fit with a guide sliding groove; the pulling wheel is installed on the upper portion of the second support; one end of the first pulling rope is wound around the first roll; the other end of the first pulling rope is fixedly connected with the pulling wheel; the third support is installed on the lower left portion of the bottom platform; the second roll is installed on the upper portion of the third support; the rocking handle is installed at the front end of the second roll; one end of the second pulling rope is fixedly connected with the pulling wheel; the other end of the second pulling rope is connected with the second roll. The manual regulator for the positioning aperture has the advantages of being reasonable in structural design, convenient to operate, high in flexibility and the like, and can assist in changing the positioning size of a positioning tool through auto regulation.

The invention provides a table tennis paddle deburring machine tool and belongs to the field of machining. The table tennis paddle deburring machine tool comprises a mounting rack, a feeding device, a rotary driving device and a grinding device, wherein the grinding device comprises a cam motor, a cam, a first pushing piece, a second pushing piece and a deburring grinding tool; the profile of the cam is matched with the shape of a table tennis paddle; the cam motor is used for driving the cam to rotate; the first pushing piece is arranged in a transversely sliding way and is provided with a pushing part; the cam is propped against the pushing part; the second pushing piece is embedded in the first pushing piece is a transversely sliding way; an elastic resetting piece is arranged between the first pushing piece and the second pushing piece; the deburring grinding tool is arranged on the second pushing piece; the feeding device is used for conveying the to-be-machined table tennis paddle to the rotary driving device; the diving rotating device is provided with a rotation driving part; and the rotation driving part is used for driving the to-be-machined table tennis paddle to rotate. According to the technical scheme, a cam mechanism is adopted to drive the deburring grinding tool to perform grinding, and a complex numerical control system is omitted, so that the production cost is greatly reduced.

The invention discloses an adjustable damper, and relates to the field of damping. The upper end of a piston rod extends out of the upper end of a cylinder body and is connected with an upper connecting head; the cylinder inner cavity of the cylinder body is provided with an oil passage; an inner cover in threaded connection with the cylinder inner cavity of the cylinder body is arranged in the middle part of the piston rod; a space formed by the inner cover and the cylinder inner cavity is filled with a damping liquid; an outer cover is installed at the lower end of the piston rod; a spring is arranged between the inner cover and the outer cover; a lower connecting head is in threaded connection with the cylinder body; a spring is arranged between the outer cover and the lower connectinghead; and an adjusting screw is arranged on a boss on the outer side of the cylinder body. According to the adjustable damper, the piston rod and the outer cover do linear reciprocating motion in thecylinder inner cavity of the cylinder body, and the damping liquid flows back and forth through the oil passage, so that damping is generated and energy is consumed; when the adjusting screw is rotated, the section area of the oil passage is changed because of the head of the adjusting screw, and the generated damping force is also changed; and the adjustable damper is simple in structure, a pressure storage device is canceled, and the springs at the two ends of the outer cover enable the damper to be provided with a reset function during bidirectional action of the damper.

The invention belongs to the goods circulation field, especially relating to a rural consumer goods circulation application platform. The platform comprises a rural store integration digital terminal, a multi-point cooperation dispatching management system server, a rural store network store system server, a rural consumer goods circulation supervision system server, and a rural consumption information service system server which are mutually connected through a network. The platform has the following advantages that: with regards to a rural consumer goods circulation mode, a channel organization with rural stores and consumer goods circulation enterprises as main propulsion power is established, a network has multiple functions, and on the basis of finishing rural store data acquisition, information interaction among a government department, a circulation enterprise, a rural store, and a consumer is realized. Opening a rural store on a network is realized, a rural store operation state is expanded, a capability of rural living article market supervision is reinforced and raised, security and health of rural living articles are ensured, and trust degree of public to quality of domestic rural circulated goods is raised.

The invention discloses a C-shaped thin-shell interlayer earthquake isolation device with the threshold-value-buckling-unloading self-resetting function. The C-shaped thin-shell interlayer earthquake isolation device comprises an upper steel plate, a lower steel plate and C-shaped-opening cylindrical shells connected between the upper steel plate and the lower steel plate; the mode of the C-shaped-opening cylindrical shells can be the array mode / annular mode. The C-shaped thin-shell interlayer earthquake isolation device has the quite-large vertical bearing capacity and the rigidity, and can effectively support the weight of buildings; as the C-shaped-opening cylindrical shell structures can have large-deformation elastic displacement in the horizontal direction, by means of the structural system that the C-shaped thin-shell interlayer earthquake isolation device is matched with a damping system and a supporting protection system, earthquake energy can be effectively isolated, it is avoided that the earthquake energy is transmitted to the upper-portion structure, earthquake responses of the buildings are reduced, and the body structures of the buildings are not damaged or not collapsed under the effect of a strong earthquake; as elastic strain energy can be gathered when the C-shaped-opening cylindrical shell structures are largely deformed, the C-shaped thin-shell interlayer earthquake isolation device has the good self-resetting function in the earthquake, the bearing function of the earthquake isolation device can be completely recovered through a hydraulic jack after the earthquake, and the large-earthquake-repairing sustainable-development engineering earthquake isolation aim is achieved.

A two-degree-of-freedom hinged joint with a return function belongs to a wire rope connection return device for a mechanical arm tail end effector adopting a wire rope soft catching manner. The hinged joint is a two-degree-of-freedom hinged joint comprising housings (2 and 9), a centrally slotted cylinder (6), and a rotating shaft (4), wherein a return leaf spring (3) and a return torsion spring (5) form an automatic return device. The two-degree-of-freedom hinged joint is characterized in that the rotation axle centers of the hinged joint in two directions are on the same point, and the return leaf spring (3) and the return torsion spring (5) are additionally arranged on a common hinged joint, so that a wire rope (8) connected with the hinged joint can return to an initial position automatically after rotation.

The invention relates to the technical field of printing, and discloses a printing process for a cosmetic packaging bottle cap. The process is characterized in that the prepared bottle cap is subjected to the following procedures of S1, clearing sundries on the bottle cap; S2, printing printing ink on the bottle cap treated in the step S1; S3, drying the part, containing the printing ink, of the bottle cap treated in the S2; S4, carrying out post-treatment on the bottle cap treated in the step S3; and finishing printing the bottle cap after the treatment in S4. According to the process, afterthe printing ink is printed on the bottle cap, the printing ink is dried, so that the drying speed of the printing ink is increased; and with the increase of the drying speed of the printing ink, theinfluence of workers on the printing ink printed on the bottle cap is reduced, and then the bottle cap printing quality is ensured.

The invention discloses an automatic detection system for air hole defects of laser tailor-welded blanks, and belongs to the technical field of welding defect detection. The automatic detection system aims to solve the problems that in the prior art, existing equipment is poor in automatic detection capacity, low in detection efficiency and poor in detection accuracy, the situation of misinformation of the heads and the tails of the tailor-welded blanks occurs in misalignment welding, and the risk of missing detection exists. The automatic detection system comprises a transmitting device, a receiving device and a counting alarm. The transmitting device transmits high-intensity infrared light in a conical transmitting mode. The receiving device is arranged opposite to the transmitting device, the receiving device at least comprises receiving lenses which are arranged opposite to emergent light of the transmitting device, and the three receiving lenses are sequentially arranged in the length direction of a welding seam. The counting alarm comprises a counting module, a reset module and a sound control module. The three receiving lenses of the receiving device are electrically connected with the counting alarm, and when only the middle receiving lens is triggered, the sound control module of the counting alarm sends out an alarm signal.

The invention discloses aluminum alloy doors and windows with a cleaning function and belongs to the field of aluminum alloy. The aluminum alloy doors and windows with the cleaning function comprise an inner fan; the inner fan comprises a fan frame and glass; the fan frame comprises an upper fan frame sectional material, a lower fan frame section material and two side fan frame sectional materials; sliding grooves parallel to the side fan frame sectional materials are formed in the inner side surfaces and the outer side surfaces of the side fan frame sectional materials; sliding blocks are arranged in the sliding grooves; the sliding blocks are fixedly connected with screw rods; wiping carriers are arranged on the inner side surface and the outer side surface of the inner fan; through holes matched with the screw rods are formed in the two ends of the wiping carriers; wiping parts are arranged on the wiping carriers; locking nuts are arranged on the screw rods; springs are arranged onthe screw rods between the side fan frame sectional materials and the wiping carriers in a sleeving way; the two wiping carriers are connected through a first stay rope; a reset spring is arranged onthe inner fan; and the reset spring is connected with the wiping carriers through a second stay rope. The aluminum alloy doors and windows with the cleaning function are simple in structure and convenient to use, and have the effect of adjusting the wiping effect.

The invention discloses a leaning-preventing electric portable drill facilitating drilling depth control. The leaning-preventing electric portable drill comprises an electric portable drill body, a handle is arranged below the side of the electric portable drill body, a switch key is arranged on the side face of the handle, a horizontal rail groove is formed in the bottom of the electric portabledrill body, a U-shaped top plate standing on the side is arranged at the bottom of the electric portable drill body, a second sliding way is arranged on a top horizontal face of the U-shaped top plate, the rail groove is in sliding fit with the second sliding way, and therefore the electric portable drill body can horizontally slide on the U-shaped top plate, and a supporting plate is arranged atan opening of the side face of the U-shaped top plate. The leaning-preventing electric portable drill has the beneficial effects that the U-shaped top plate is attached to the surface of an object, and therefore a drill bit is perpendicular to the object all the time when the electric portable drill body drills a hole, and drill bit breaking or hole leaning is avoided; and the position of a positioning plate is adjusted, a sliding plate is limited, and the hole drilling depth is accurately controlled.

The invention belongs to the technical field of civil engineering structure reinforcement and transformation construction, and particularly relates to a device for reinforcing a concrete beam through fiber cloth and a construction method thereof. The device comprises a roller frame provided with a pressing roller and adjusting supports, supporting rods are vertically arranged on the two sets of adjusting supports located on the two sides of the roller frame in a guiding fit mode, longitudinal adjusting wheels or limiting pins horizontally extend from the top ends of the supporting rods to the upper surface of the concrete beam, and therefore, the fiber cloth is pressed on the lower surface of the concrete beam through clamping cooperation of the longitudinal adjusting wheels or the limiting pins and the pressing rollers. The device further comprises a longitudinal adjusting assembly capable of enabling the supporting rod to generate vertical adjusting and positioning actions relative to the adjusting support. The device has the advantages of being easy and convenient to operate, high in reinforcing efficiency and good in finished product quality, time and labor are saved, and the actual construction period can be effectively shortened. The invention further provides a construction method applying the device, so that the purpose of on-site rapid construction of the fiber cloth is achieved specifically.

The invention provides a protector for a three-phase motor of an alternating-current or direct-current electric locomotive. The protector comprises a current transformer, a KM contactor, a data processing chip, a delay and a switching signal collector, wherein the current transformer and the KM contactor are connected to a subcircuit of the three-phase motor in series, the current transformer, the relay and the switching signal collector are all electrically connected with the data processing chip, the normally-closed node of the relay with the input end electrically connected with a control switch is electrically connected with the KM contactor, the normally-open node of the relay is electrically connected with a fault signal output circuit, and the witching signal collector is electrically connected with the control switch. A novel power electronic device is adopted in design, the sensitivity is high, defects of traditional tripping switch protection are overcome, and the protector can be suitable for various environments.

The invention relates to the technical field of wireless communication base station antennas, and provides an electrically tunable antenna transmission system. The electrically tunable antenna transmission system comprises an electric controller device and a resettable scale device, the electric controller device comprises an electric controller, and the electric controller comprises at least onemotor; the resettable scale device comprises at least one resettable scale unit; each resettable scale unit comprises an L-shaped scale, a scale stop block, a scale pull rod, a transmission slide block and a screw rod; the motor is used for driving the screw to rotate; the transmission sliding block sleeves the screw rod and is used for driving the scale pull rod to do linear reciprocating motion;the horizontal part of the L-shaped scale is sleeved with an elastic element, and the vertical part of the L-shaped scale is sleeved with the scale pull rod; and the scale stop block sleeves the horizontal part of the L-shaped scale, so that the elastic element moves between the scale stop block and the vertical part of the L-shaped scale. The scale of the electrically tunable antenna transmission system has a reset function and can be directly installed on an antenna, so that the reliability and the assembly efficiency are improved.

The invention provides a novel insert core interlocking mechanism comprising a shell (1). An extension rod (2) penetrates through the shell (1) in the internal axis direction. A hanging plate (3) is arranged at the front end of the extension rod (2). The extension rod (2) is provided with a protruding part (4) and is provided with a resetting spring (5) at the front end of the protruding part (4). The resetting spring (5) is located in the shell (1). A rotatable sector plate (6) is installed in the shell (1) and a connecting plate (7) is hinged to the sector plate (6); the other end of the connecting plate (7) is in hinge joint with the extension rod (2). The shell (1) is provided with a groove allowing the sector plate (6) to protrude. An insert core (8) is installed on the outer side wall of the shell (1) on one side of the groove. One end of the insert core (8) is provided with an insert core handle (9) and a limiting pin (10). The novel insert core interlocking mechanism is convenient to use, occupies less space and facilitates assembly and disassembly.