104results about How to "Improve locking effect" patented technology

The utility model relates to sheet metal processing technical field, concretely is a kind of portable sheet metal processing bending device, the utility model provides the following technical scheme: a kind of portable sheet metal processing bending device, including mounting plate, the top surface of mounting plate is fixedly connected with first side plate, the back of first side plate is equipped with first support roller;Telescopic stand, the telescopic stand is installed in the inside of telescopic groove, the front surface of telescopic stand is equipped with second hole, the front surface of first telescopic frame is equipped with first hole hole.The utility model is moved to proper position by telescopic stand, then when the position of first hole hole and second hole overlaps, locking column is installed to the inside of first hole hole and second hole, to lock the position of telescopic stand, so that the overall locking effect is better, so when the distance between mounting plate and stabilizer block is adjusted, overall operation is relatively convenient.

The utility model provides a kind of self-adapting conformal elastic bone plate, including bone plate body, the upper end of bone plate body is equipped with multiple limit openings, the inner end of limit opening is threadedly connected with stud, and the end of stud close to limit opening is fixedly connected with locking inner column, and the outer end of locking inner column is provided with several anti-loosening threaded parts, by the thread cooperation of stud and limit opening and the setting of locking inner column and anti-loosening threaded part, the preliminary positioning and stable locking of bone plate body on bone surface are realized, prevent loosening and falling off, and multiple groups of follow-up self-adapting horizontal plates can generate elastic deformation according to irregular arc or curved surface of bone surface affected area under the action of spring piece, self-adapting conform to bone surface profile, fill gap, the magnetic connection of electromagnetic side block and metal inner block, further fixed follow-up self-adapting horizontal plate, ensure that bone plate and bone surface are closely adhered, and flexible contact surface increases contact comfort, avoid damaging bone surface tissue.

A cable truss, including upper chord cable, lower chord cable, cable clamp, cable clamp support arm, cable end connecting block; the two ends of the cable clamp support arm are respectively provided with a cable clamp, the cable clamp is a cylindrical structure as a whole, which is composed of upper spiral body, middle spiral body and lower spiral body, the joint of the upper spiral body and the middle spiral body is provided with an upper chord cable through hole, and the joint of the middle spiral body and the lower spiral body is provided with a lower chord cable through hole; a plurality of telescopic locking pin shafts are arranged in the upper spiral body and the lower spiral body in the vertical direction, the middle spiral body is provided with locking pin shaft insertion holes corresponding to the locking pin shafts, and the locking pin shafts are inserted and matched with the locking pin shaft insertion holes. The application solves the design problem of the cable net node, reduces the adverse effect of the unbalanced force between the cable nets on the overall structure, increases the force rationality of the node and the safety of the whole cable net, reduces the processing and manufacturing cost and the construction difficulty, and can be applied to the "sky round place" structure of the "Dream of Red Mansions" drama fantasy garden engineering.

The utility model relates to a height adjustable monitoring device, aims at solving the technical problem that the height locking mechanism of part monitor is complicated and unstable, part power driven locking mechanism needs to be powered continuously, and the power consumption is more, and it includes the adjusting frame and the vertical board, the surface central fixed connection of vertical board has the vertically arranged ratchet bar, the vertical board surface fixed connection has the magnetic attraction piece opposite one side of ratchet bar, the adjusting frame inboard wall fixed connection has the electromagnet of magnetic attraction piece horizontal height correspondence, the adjusting frame between upper and lower inboard wall of vertical board one side rotatably connected has the lead screw, the surface of lead screw is through the lifting block and is connected with the lifting block screw thread, the surface fixed connection of lifting block one side to vertical board has the fixed plate, the fixed plate lateral wall fixed connection has the ratchet wheel, the adjusting frame bottom fixed connection has the servo motor of lead screw just below, the utility model locking mechanism simple structure, need not always power on to guarantee the locking of lead screw, has saved the electric power, has saved the energy.

The utility model discloses a cement mortar jolt ramming device, relates to the technical field of cement mortar jolt ramming, and solves the problems that the existing cement mortar jolt ramming device is poor in locking effect when fixing a test mold, the test piece is not firm enough to fix, and the jolt ramming quality of the test piece is further influenced, the cement mortar jolt ramming device comprises a machine body, a vibrating plate, a fixing mechanism and a pressing mechanism, the fixing mechanism comprises a placing plate fixedly installed on the vibration plate, two transverse clamping plates symmetrically installed on the placing plate and two longitudinal clamping plates symmetrically installed on the transverse clamping plates, the pressing mechanism comprises a pressing frame hinged to the vibration plate, and one end of the pressing frame is fixedly connected with a connecting lug; a locking groove is formed in one end of each connecting lug, a fixing block is fixedly connected to one side of the top of the vibration plate, a stud is hinged to the interior of the fixing block, and a locking nut is in threaded connection to the stud. According to the utility model, through the arrangement of the fixing mechanism and the pressing mechanism, the locking effect of the test mold can be improved, and the compaction quality is ensured.

The application belongs to the technical field of coated sand for casting, and discloses a composite heat-insulating coated sand with low heat conduction and high stability and a preparation method thereof.The coated sand comprises raw sand, phenolic resin, boron-silicon hybrid porous ceramic microshell modifier, heat-triggered boron-silicon-benzoxazine interface bridging microcapsule modifier, curing agent and lubricant.During preparation, the boron-silicon hybrid porous ceramic microshell modifier is mixed with preheated raw sand, and then the first part of phenolic resin, the heat-triggered interface bridging microcapsule modifier, the second part of phenolic resin, the curing agent and the lubricant are sequentially added to obtain the composite heat-insulating coated sand.The coated sand forms a layered structure of a raw sand core, a boron-silicon microshell heat-insulating inner layer, a benzoxazine bridging interface layer and a phenolic resin outer sealing layer, forms an interface bridging network in the core-making heating stage, and thus reduces heat conduction and improves thermal strength and storage stability.

This utility model discloses a limiting and positioning device for energy-concentrating pipe fittings, relating to the field of energy-concentrating pipe fitting installation technology. It includes a mounting base, on which a mounting mechanism for limiting and positioning the energy-concentrating pipe fitting is provided. The mounting mechanism includes a clamping assembly, including a mounting bracket on the upper surface of the mounting base. The upper end of the mounting bracket has a V-shaped groove, and a top plate is fixed to the top of the mounting bracket. This utility model's clamping assembly, through the coordinated work of multiple structures such as the V-shaped groove, pressing ring, and lower pressure plate, achieves multi-directional clamping of the energy-concentrating pipe fitting. The automatic centering of the V-shaped groove and the initial stabilization of the pipe fitting by the anti-slip rubber pad; the pressing ring, in conjunction with a screw and guide rod, achieves stable downward clamping; rubber bolts protect the surface of the pipe fitting; and the lower pressure plate provides auxiliary positioning from both sides, improving the clamping stability and positioning accuracy of the pipe fitting. It is suitable for energy-concentrating pipe fittings of different specifications and has good versatility and reliability.

The utility model discloses an ophthalmic cavity instrument multi-channel cleaning frame, specifically relates to ophthalmic cavity instrument cleaning technical field is equipped with the connecting pipe, and the connecting pipe includes: rigid fixed head, is connected on the connecting pipe, and the faraway connecting pipe one end is equipped with the help suction connecting portion, is used for with the help suction hole detachable connection of injection suction handle, the elastic hose is equipped in the side of rigid fixed head, and the front end is equipped with perfusion connecting portion, is used for with the perfusion hole sealed connection of injection suction handle. The utility model through setting up rigid fixed head on the basis, the elastic hose is installed in the side, realizes the one side channel of cavity instrument and is fixed in rigid fixed head place, and the other side uses the butt joint of elastic hose and connects, realizes double channel simultaneous flushing, guarantees the cleaning effect of instrument cleaning, also reduces the manual work of staff, improves the work efficiency.

The invention discloses a prestressed concrete connecting piece, and belongs to the technical field of concrete reinforcing pieces. The connecting structure at least comprises a first connecting piece, a locking piece and a second connecting piece, one end of the first connecting piece is in threaded connection with a threaded head, the threaded head is stably connected with one reinforcing steel bar, the locking piece is arranged in the first connecting piece and arranged outside the other reinforcing steel bar in a clamping and sleeving mode, and the second connecting piece is in threaded connection with the first connecting piece. A first gasket and a second gasket are further assembled in the first connecting piece, the inner wall of the first connecting piece, the first gasket and the outer wall of the threaded head cooperate to form a first grouting gap, the inner wall of the first connecting piece, the second gasket and the outer wall of the locking piece form a second grouting gap, and the second gasket and an inner cavity of the locking piece define a third grouting gap. When concrete is poured, the three grouting gaps can be smoothly filled with slurry, the integrated connection strength of the two steel bars and the connecting piece is remarkably enhanced, and the requirement of a prestressed concrete structure for connection stability is fully met.

The utility model discloses a computer electronic control temperature regulator relates to computer technical field. This computer electronic control temperature regulator includes regulator mainboard, bearing frame, clamping seat, card block, locking unit. This computer electronic control temperature regulator adopts the clamping design of clamping seat and card block, and the plug -in design of power supply plug and power supply socket, makes the installation and disassembly of the cooling fan become simple and fast, need not use screwdriver and other additional tools, has improved the efficiency of installation and maintenance greatly, through setting locking unit, it is convenient to realize quick locking or unlocking to card block and cooling fan, and the operation is simple and convenient, and locking effect is stable and reliable, effectively prevented the loosening of cooling fan in the operation process, and the temperature regulator can also easily cope with the maintenance and replacement demand of cooling fan under the multiple computer use scene, greatly shorten the maintenance time, improve the work efficiency.

This utility model discloses a hydraulic winch rope arranger, including a support base, a rope arranger body, a traction rope, and a hydraulic actuator. A rope arranging auxiliary mechanism is provided at the rear end of the support base. The auxiliary mechanism includes a fixed seat fixedly connected to the rear end of the support base, a control frame fixedly connected to the upper end of the fixed seat, a hydraulic cylinder fixedly connected to the upper end of the control frame, and an adjustment frame movably connected to the outer side of the control frame. The hydraulic winch rope arranger of this utility model, by activating the hydraulic cylinder, pulls the control rod through the connecting plate. This causes the control rod to move the adjustment frame towards the rotating disk through the connecting block, bringing the limiting block into contact with the control block. The limiting block, through the control block, limits the rotation of the rotating disk, achieving the purpose of locking the rope arranger body and providing multiple braking effects, thereby preventing heavy objects from pressing down on the traction rope and causing it to move in the opposite direction, and improving overall safety.

The pneumatic locker comprises a shell assembly, a fixing shaft, an inner sliding sleeve, a piston assembly and a plurality of balls, and the fixing shaft is arranged in a containing cavity of the shell assembly and extends in the extending direction of the containing cavity; the outer peripheral surface of the inner sliding sleeve is provided with an outer conical surface of which the diameter is gradually increased along the extension direction of the fixed shaft; the inner sliding sleeve is movably sleeved with the piston assembly, the piston assembly divides the containing cavity into a pressure boosting space and a pressure bearing space which are not communicated with each other, and the inner side face of the piston assembly is provided with an inner conical face matched with the outer conical face; the plurality of balls are arranged between the outer conical surface and the inner conical surface; when gas is input into the pressure boosting space, the gas in the pressure boosting space pushes the piston assembly to move towards the pressure bearing space so that the balls can move towards the pressure bearing space, meanwhile, the distance between the outer conical surface and the inner conical surface is reduced, and therefore locking fit is formed between the piston assembly and the fixing shaft. According to the technical scheme, the consistency of each locking state can be greatly improved.

The utility model discloses a steering knuckle of a fishing umbrella, and belongs to the field of fishing tackle assistive devices. Comprises: a fixed body having a rotation space; an elastic member; the rotating body is provided with a plurality of first inserting parts and a plurality of second inserting parts; the arrangement direction of the first insertion part is vertical to or inclined to the arrangement direction of the second insertion part; and a plurality of first slots for the first insertion parts to be inserted and a plurality of second slots for the second insertion parts to be inserted are formed in the rotating space. The device has the beneficial effects that the locking and fixing effects between the rotating body and the fixed body are improved in the mode that the multiple first inserting parts are inserted into the first inserting grooves, and the multiple second inserting parts are inserted into the second inserting grooves; the first inserting part and the second inserting part are perpendicular or inclined, so that the first inserting part and the second inserting part can provide two forces which are different in stress direction and prevent the rotating body from rotating relative to the fixed body for the rotating body, the locking effect between the rotating body and the fixed body is further improved, and the product quality is improved.

This invention proposes an engineering-reinforced flame-retardant color-coated sheet, comprising: a first sheet and a second sheet. A first fastener and a second fastener are respectively provided at one end of the first sheet and the second sheet, and the first sheet and the second sheet are detachably connected via the first fastener and the second fastener. The first fastener includes two movable pins. A through hole is provided at one end of the first sheet along the width direction of the first sheet, and both movable pins are movably installed within the through hole, forming an adjustable interlocking area between the two movable pins. This invention features a novel design and simple operation. Through the setting of the first fastener and the second fastener, the pre-positioning protrusion in the second fastener ensures the accuracy of the connection end face between the first sheet and the second sheet during the connection process. Under this premise, the first fastener and the second fastener can be subsequently connected, resulting in a stable connection and accurate positioning.

The utility model relates to water turbine technical field discloses detachable tubular water turbine guide vane locking device, water turbine guide vane and tubular water turbine with manual and hydraulic double locking function, the locking device includes the manual locking plate set up on the locking hole end face and installs the locking support on the guide vane outer ring, is provided with the locking cylinder on the locking support, the locking cylinder has the locking pin reciprocating in the locking cylinder in, the end of locking cylinder has the opening for the locking pin to pass through, the locking pin is cooperated with the locking hole, realizes water turbine guide vane hydraulic lock; The manual locking plate is equipped with through -hole, and the through -hole has locking bolt, the end surface of locking pin is provided with the locking screw hole of adapting with locking bolt, and locking pin is cooperated with locking bolt, realizes water turbine guide vane manual lock. The utility model will lock the support and combine on the guide vane outer ring, realizes the separation of locking support and runner chamber, and the locking device is detachable, not only is convenient for overhauling and simplifies runner chamber structure.

The utility model relates to a handle locking structure of air fryer, including the kettle body, the face shell of connecting in the front side of kettle body and the handle of detachable connection on face shell, be equipped with the connecting port on the face shell, be equipped with the connecting portion of cooperation with connecting port on the handle, handle passes through connecting portion and is opposite face shell at least can be converted between the installation and removal position state and the use position state, still include locking structure, locking structure is connected in the face shell in - and is located one side of connecting port, the connecting portion is opened and has the locking slot, locking slot corresponds with locking structure when in use position state, be connected with the elastic structure on locking structure, and be inserted into the locking slot in the elastic structure elasticity, make handle locking in use position state, this handle locking structure passes through the cooperation of locking structure and locking slot, play the effect of blocking, ensure that handle is in stable state after installation, prevent the handle from loosening in the use process due to the misoperation.

The application belongs to the technical field of electric energy metering box, and provides a safe multifunctional electric energy metering box, which comprises a box body, a box door hinged to one side of the box body, an inner door sealing flange arranged on the inner side of the box door, a box body sealing flange arranged on the box body in correspondence, and a sealing assembly; the sealing assembly comprises a bracing mechanism arranged on the box door and a ring-shaped self-locking sealing ring; the ring-shaped self-locking sealing ring is sleeved on the bracing mechanism, and the ring-shaped self-locking sealing ring has a bracing state in which the outer side of the ring-shaped self-locking sealing ring is tightly fitted with the inner door sealing flange and the box body sealing flange, and a retraction state in which the outer side of the ring-shaped self-locking sealing ring is separated from the inner door sealing flange and the box body sealing flange; the bracing mechanism is configured to place the ring-shaped self-locking sealing ring in the bracing state when sealing and locking are needed, and to place the ring-shaped self-locking sealing ring in the retraction state when sealing and locking are to be released. The safe multifunctional electric energy metering box has good sealing effect and locking effect on the box door, and is high in safety.

The utility model relates to the technical field of machine tool tail frames, in particular to a machine tool tail frame with a locking mechanism, which comprises a sliding rail, a sliding seat is arranged at the top of the sliding rail in a sliding mode, a tail frame body is fixedly arranged at the top of the sliding seat, an ejector rod is arranged in the tail frame body through a threaded rod, and a rotating hand wheel is arranged on the side face of the tail frame body in a matched mode. A locking rod is fixedly connected to the side face of the tailstock body and mechanically connected with the ejector rod, an adjusting rod is fixedly arranged on the side face of the tailstock body, and a clamping plate is arranged at the bottom of the adjusting rod in a matched mode. The self-locking device has the beneficial effects that when the clamping plate and the sliding rail are locked in a friction mode, a main contact and an auxiliary contact in the self-locking structure are driven to make contact, a first electromagnet and a second electromagnet are powered on and magnetically attracted with a magnetic block and the sliding rail respectively, the self-locking effect is achieved, and the locking effect of the machine tool tailstock is further stabilized; and power-on control is conducted through a power-off button at the top of the adjusting rod, operation is convenient, the tailstock can be flexibly moved, and use is convenient.

The utility model relates to the technical field of wind power generation discloses a fan manual variable pitch reminding device and wind generating set. The utility model provides fan manual variable pitch reminding device, through the accumulated number of inside and outside trigger signal statistics door is compared, accurate judgment personnel whether has left the hub cabin completely, avoids the major risk of false start variable pitch operation because of personnel in the hub, simultaneously, through the combination of physical trigger mechanism (inside and outside handle) and electronic detection unit, replaces voice transmission with mechanical action, changes subjective hearing order response into objective action, signal, judgment closed loop process, forces operating personnel to complete the access confirmation according to the procedure, reduces the safety accident caused by artificial misjudgment, arbitrary operation or unclear communication, avoids the influence of environmental noise on signal, ensures the stability and accuracy of trigger signal.

The application discloses a kind of double locking structure cable joint, including connecting body, the upper end of the connecting body is equipped with compression nut, lower end is equipped with joint body, the compression nut and joint body are all with connecting body screw thread cooperation, the connecting body is equipped with nylon compression ring with compression nut piece, the nylon compression ring adopts plastic material, the opening is opened on the nylon compression ring, the gecko tail piece is equipped with in both ends of the opening, the gecko tail piece is equipped with multiple V-shaped mouths, the inner side of the compression nut and joint body is all inclined surface arrangement, and it is matched with the nylon compression ring the upper end of the compression nut is equipped with connecting lug, the connecting lug is equipped with fixed peg, the thread of the fixed peg both ends is oppositely arranged, the adjusting ring is equipped with in both ends of the connecting lug, the fixed peg is matched with adjusting ring, the adjusting ring is equipped with locking peg, the inner side of the adjusting ring is equipped with locking ring, locking ring is matched with locking peg, the equipment is better to cable fastening, improve waterproof effect.

The utility model relates to the technical field of radiators, and discloses a fin radiating structure for optimizing the performance of a radiator, which comprises a cover body, the radiating structure comprises a contact plate, the top of the contact plate is fixedly connected to the inner wall of the top of the cover body, the top of the contact plate is fixedly connected with a plurality of heat conduction pipes, and the heat conduction pipes are fixedly connected with the cover body. The top of the contact plate is fixedly connected with a heat conduction assembly, the exterior of the heat conduction assembly is fixedly connected with a heat dissipation plate, and the exterior of the heat conduction pipe, namely the side close to the exterior of the top of the contact plate, is fixedly connected with a conduction plate. According to the utility model, the contact plate is in contact with the surface of a heating object, so that heat can be effectively transferred, meanwhile, the conduction plate and the heat conduction pipe can effectively transfer heat into the heat dissipation plate for effective heat dissipation, and the design of the arc-shaped heat dissipation plate not only increases the contact area with air, but also promotes the convection effect; the heat dissipation performance is further improved, and the heat dissipation efficiency is improved.

This utility model discloses a cable support and fixing device for power transmission and transformation engineering construction, belonging to the technical field of power transmission and transformation engineering. The cable support and fixing device includes a mounting frame, a support plate fixedly mounted on the mounting frame, a cable fixing sleeve fixedly mounted between two support plates, and a clamping mechanism disposed on one side of the support plate for clamping the cable. The clamping mechanism includes a fixing block fixedly mounted on one side of the support plate and a rotating rod rotatably mounted inside the fixing block. Through the coordinated use of the above devices, the clamping mechanism moves the threaded rod, drives the connecting block to move, and then pushes the moving ring to move synchronously. The displacement of the moving ring drives multiple hinge seats to move in tandem. Through the linkage between the hinge seats and the connecting rod, the rotating rod is caused to rotate. The rotation of the rotating rod further drives the clamping plate to tighten the cable, significantly improving the locking effect of the cable outer wall.

The utility model discloses a case cabinet door lock fastener for a high-speed train, which comprises a case cabinet door lock fastener main body, and the case cabinet door lock fastener main body comprises a cabinet door body and a case fixing plate. A fixed box body is fixedly mounted in the middle of one side of the cabinet door body through a screw; a lock shaft is mounted on the surface of one side, extending to the cabinet door body, of the interior of the fixed box body; by designing the stability control mechanism, when the cabinet door lock fastener main body locks, installs and adjusts a lock catch on a cabinet door body and drives the lock catch to rotate through a lock shaft, a fixing ring rotates along with the lock catch, and a rotating control block is driven to be located in a rotating control groove and is smoothly controlled by a ball in a rotating mode, so that the fixing ring and the lock catch are stably controlled and adjusted; and stable control is still achieved when gaps occur due to friction generated by frequent rotation adjustment, the lock catch is conveniently and stably clamped to the outer surface of the clamping column to be locked and fixed, and the stability control performance and the locking effect of the cabinet door body installed on the high-speed train case through the case cabinet door lock fastener body are improved.

This utility model discloses a locking structure for the folding part of a folding bicycle, including a folding buckle and a locking buckle. Two folding buckles are provided; one folding buckle connects to the first folding part between the headstock connecting tube and the front frame seat tube, and the other folding buckle connects to the second folding part at a node of the front frame main beam. The folding buckle can lock and unlock the first and second folding parts. The locking buckle is connected to the fastening sleeve of the seat connecting tube and has a reverse buckle portion, which can be engaged and disengaged from the rear frame connecting part by swinging and rotating. This utility model provides two folding buckles and one locking buckle to lock the first folding part, the second folding part, and the connection between the rear frame and the seat connecting tube of the folding bicycle, respectively. This multi-point locking ensures the structural stability and safety of the folding bicycle in the unfolded state, effectively avoiding safety hazards caused by loosening of the folding parts during riding.

The utility model relates to the technical field of oil pump testing, in particular to an oil pump durability testing platform. The oil pump durability test platform comprises an oil pump durability test platform body, a supporting frame is arranged on the top of a workbench of the oil pump durability test platform body, and the left side and the right side of the inner side wall of the supporting frame are each provided with a set of adjusting plates. By freely adjusting the positions of the adjusting plate and the adjusting block, the internal thread connecting hole in the adjusting block can be aligned with bolt holes in oil pumps of different models, and after the first locking bolt and the fourth locking bolt are screwed off, the adjusting block can be taken out of the sliding groove of the adjusting plate. In this way, the adjusting blocks provided with the internal thread connecting holes of different sizes can be replaced, the sizes of the internal thread connecting holes in the adjusting blocks are matched with bolt holes in oil pumps of different models, and the installation adaptability of the oil pump durability testing platform to the oil pumps of different models is further improved.

The utility model relates to a lock technical field especially is a showcase glass door magnetic formula safety lock, including show cabinet body and glass door, the magnetism fixed component is fixedly connected in the show cabinet body inboard, glass door left side fixedly connected has the frame body subassembly, the lock assembly is installed to frame body subassembly inboard, frame body subassembly includes fixed plate, the fixed plate left side fixedly connected has the horizontal plate, the horizontal plate both ends are fixedly connected with the boss, the boss inboard is established with the axle hole, the axle hole inboard fixedly connected with the clockwork spring, the horizontal plate left end fixedly connected with the baffle, the lock assembly includes the clamping plate, the clamping plate top fixedly connected with the permanent magnet block, the clamping plate lower end fixedly connected with the oblique fixed plate, the oblique fixed plate outside fixedly connected with the rack, the oblique fixed plate both ends are fixedly connected with the axle column, in the utility model, the device passes through the magnetic force lock and mechanical limit double protection, significantly improve showcase glass door locking stability and security, effectively improved the display security of cultural relics.

The application discloses a telescopic pipe assembly and a tripod capable of realizing double-pipe-face locking. The telescopic pipe assembly capable of realizing double-pipe-face locking comprises a first pipe, a second pipe with a first through hole and a first locking control assembly. The first locking control assembly comprises a first contact sheet, a first extruding piece with a second eccentric part and a first driving rod. The first contact sheet is provided with a first protruding part and a first eccentric part on both side walls in one-to-one correspondence. The first contact sheet is installed on the second pipe, and the first protruding part is embedded in the first through hole. The first extruding piece is installed inside the second pipe, and the second eccentric part and the first eccentric part are arranged in correspondence. The first driving rod drives the first extruding piece to rotate forward, so that the second eccentric part and the first eccentric part cooperate to extrude the first contact sheet, abuttingly lock the inner wall surface of the second pipe, the first protruding part abuttingly locks the inner wall surface of the first pipe, and the telescopic pipe assembly can lock the first pipe and the second pipe.