61results about How to "Less likely to move" patented technology

Ultrasound systems for imaging internal structure of a patient including a probe ( 10 ) having a handle ( 20,32 ) and a transducer ( 18 ) arranged in connection with the handle ( 20,32 ) for obtaining images, either in the handle as in a transthoracic probe ( 10 ) or in a probe shaft ( 16 ) coupled to the handle as in a TEE probe ( 10 ). Controls on the handle enable a switch in the operation mode of the probe ( 10 ) and / or optimization of images obtained by the transducer ( 18 ). A display device ( 14 ) coupled to the probe ( 10 ) displays control menus and optional obtained images. A control unit ( 12 ) controls the probe ( 10 ) and display device ( 14 ) based on control activation. A change in control menu displayed by the display device ( 14 ), a switch in the mode of operation of the probe ( 10 ) and / or adjustment of images obtained by probe ( 10 ) is effected based on activation of handle control(s) ( 24,26,28 ). A foot pedal ( 38 ) can be provided including same controls ( 24,26,28 ) as the handle ( 20,32 ).

The invention relates to the technical field of indoor decoration design and discloses an intelligent environment-friendly green plant decoration wall for indoor decoration. The decoration wall comprises a wallboard and multiple supporting plates for supporting bonsais and further comprises an irrigation component positioned on the wallboard and a water receiving disc positioned at the lower end of the wallboard, multiple fixing holes for embedding of the bonsais are formed in each supporting plate, a supporting rod with extending direction perpendicular to the surface of the wallboard is arranged on each of two sides of the lower end of the wallboard, an upright upwards extending along the vertical direction is arranged at each of two ends of each supporting rod, a through hole for the corresponding upright to penetrate is formed in each supporting plate, and an adjusting member for fixing the corresponding supporting plate at different height positions of each upright is arranged between the upright and the corresponding supporting plate. Each supporting plate moves up and down along the corresponding upright; after each supporting plate moves to a proper position, the supportingplate can be fixed on the corresponding upright through the corresponding adjusting member, then the bonsais of green plants can be embedded through the fixing holes in each supporting plate, and atthe moment, a distance between each two adjacent supporting plates can be changed according to height of different green plants after growing.

The invention discloses a handcart used for textiles and easy to move. The handcart comprises a base, wherein a motor is fixedly connected with the top near the axle center of an inner cavity of the base; a rotating shaft of the motor is fixedly connected with a threaded rod; a threaded tube is sleeved on the surface of the threaded rod; the bottom of the threaded tube is fixedly connected with a supporting plate; first connecting rods are fixedly connected with both sides of the bottom of the supporting plate; and the bottom of the base is provided with first through holes on both sides. The handcart used for the textiles and easy to move achieves the effect of driving the threaded rod to rotate by virtue of the motor, achieves the effect of driving the supporting plate, rolling wheels and movable plates to move by virtue of the threaded rod and the threaded tube, achieves the effect of driving second connecting rods and supporting legs to move by virtue of the movable plates, and achieves the effect of placing rollers by virtue of a placing plate and placing grooves. The handcart is easy to move, and when the rollers are placed on the handcart, the rollers are not liable to move, so the handcart facilitates the use for people.

The present invention relates to a body floor structure (1, 21, 31, 41), which, within the center tunnel (2), comprises a first receiving clearance for receiving a first energy storage device (4, 34, 44) for the storage of energy for driving the vehicle and in the rear seat region (3) comprises a second receiving clearance for receiving a second energy storage device (5, 25) for the storage of energy for driving the vehicle and a motor vehicle, specifically a hybrid vehicle, which comprises this body floor structure (1, 21, 31, 41).

The invention discloses spinning line color spraying equipment for textile. The spinning line color spraying equipment comprises a box body, transmission rollers and a color spraying device, the transmission rollers are installed at the bottom end of the box body from left to right at intervals, the color spraying device is installed on the left side of the top end of the box body, and the bottomend of the color spraying device extends to an inner cavity of the box body; and the spinning line color spraying equipment further comprises a drying mechanism installed on the right side of the inner cavity of the box body and a fixing mechanism mounted on the front side of the drying mechanism. According to the spinning line color spraying equipment, a hot air blower works to supply hot air into an air outlet box and blow the hot air to the textile, dye at the top end of the textile is rapidly dried, it is guaranteed that the dye which is not dried on the surface of the textile is not proneto moving after color spraying and when the textile moves, dye movement is avoided, patterns are not prone to deformation and blurring, and product quality is guaranteed. A push plate is moved towards the inner side, a spring is compressed, and a clamping block is driven to move out of an inner cavity of a clamping groove, so that control over a sliding block is relieved, the air outlet box is pulled out forwards, and repair or maintenance can be conducted more conveniently.

The invention discloses a thin film laminated structure and a manufacturing method thereof. The manufacturing method comprises the following steps: providing a substrate, and forming a groove in the substrate; forming a tackifying layer on the inner wall of the groove; forming a nano metal wire layer in a groove of the substrate; forming a protective layer on the substrate. In the thin film laminated structure and the manufacturing method thereof, the nano metal wire layer is no longer simply coated on the substrate, but filled in the groove on the substrate, thereby increasing the contact area between the nano metal wire layer and the substrate and improving the adhesion between the nano metal wire layer and the substrate; an adhesion-enhancing layer is arranged between the nano-metal wire layer and the substrate, which further enhances the adhesion between the nano-metal wire layer and the substrate, and reduces the possibility of the nano-metal wire layer moving when the substrate is bent; the protective layer is also formed on the substrate to fix the silver nanowire layer on the substrate, further reducing the possibility of the nanowire layer moving when the substrate is bent, and protecting the nanowire layer from external environmental influences such as corrosion and wear.

A connectored cable including: a cable having an optical fiber for transmitting an optical signal; and a connector that accommodates a substrate on which a photoelectric conversion portion that is optically coupled to an end face of the optical fiber is installed, and in which the optical fiber is wired so that at least three bent portions are formed, the orientation of the optical fiber in a front-rear direction being changed, the optical fiber being bent into a U shape at each of the bent portions, and so that one of two bent portions on a front side is located on a down side of the substrate and the other bent portion on the front side is located on an up side of the substrate, the front-rear direction referring to a direction in which the cable extends from the connector, a rear side referring to a side in which the cable extends as seen from the connector, the front side referring to an opposite side of the side in which the cable extends, the up side referring to a side of the photoelectric conversion portion as seen from the substrate, the down side referring to an opposite side of the side of the photoelectric conversion portion.

A pair of scissors includes two scissor elements and a pivotal device. Each scissor element includes a countersink extending from a first side thereof through a second side thereof. The pivotal device includes a screw and a nut. The screw includes a threaded shank and an enlarged head. The nut includes a non-circular shank and an enlarged head, with a screw hole extending through the non-circular shank and the enlarged head of the nut. The nut is received in the countersink of one of the scissor elements, with the non-circular shank of the nut extending into a non-circular countersink of the other scissor element. The threaded shank of the screw is threadedly engaged with the screw hole of the nut. Thus, the contact area between the screw and the pivotable scissor elements is small.

The invention relates to an atrial shunt system, and belongs to the technical field of medical instruments. The atrial shunt system comprises an atrial shunt conveying device and an atrial shunt, the atrial shunt conveying device comprises a hanging head switch, a sliding valve, a handle, an outer sheath tube, a pushing tube, a control hanging head, an inner sheath tube and a tip end. the inner sheath tube penetrates through the outer sheath tube, and a tip is arranged at one end of the inner sheath tube; a pushing tube is arranged at the tail end of the outer sheath tube, and a control hanging head is arranged at the tail end of the pushing tube; a handle is arranged at the end, close to an operator, of the outer sheath tube; a hanging head switch connected with the control hanging head is arranged on the handle; the handle is further provided with a sliding valve connected with the pushing tube; a gap for mounting the atrial shunt is formed between the outer sheath tube and the inner sheath tube; and the atrial shunt is separated from the atrial shunt conveying device by controlling deformation of the hanging head. According to the atrial shunt system, the heart blood can be shunted, so that the purposes of delaying heart failure and treating heart failure are achieved; and the atrial shunt system is relatively simple in structure and safe and reliable to use.

The invention discloses a cosmetics display cabinet capable of mechanically rotating. The cosmetics display cabinet comprises a cabinet body. A cargo inlet door is formed in the middle of the outer surface of the cabinet body. A slide groove is fixed at the bottom of the cargo inlet door. A base is fixed at the bottom of the cabinet body. A motor is arranged in the base. According to the cosmeticsdisplay cabinet capable of mechanically rotating, due to the cargo inlet door, the slide groove, a lead screw and a slider, when a customer needs to check different cosmetics, workers can turn on themotor, the motor makes the lead screw rotate, so the slider rotationally connected with the lead screw is rotated, and the customer can conveniently and more comprehensively check the cosmetics; rising or falling can be realized in the rotation process of the slider, and when the cosmetics are moved to the corresponding position of the cargo inlet door, the workers can pull open the cargo inlet door and take out the cosmetics by making the cargo inlet door slide on the slide groove so that the customer can conveniently purchase the cosmetics.

The application relates to a prestressed anchor cable structure and a prestressed anchor cable construction method, including an anchor cable and a grouting pipe. An anchor cable hole is opened in the soil layer, and both the anchor cable and the grouting pipe are partially located in the anchor cable hole. The end of the anchor cable is fixedly connected with a fixed block, and an inner cavity is opened in the fixed block, and a plurality of strip-shaped holes are opened on the inner wall of the inner cavity, and a fixed assembly is arranged in the inner cavity, and the fixed assembly includes a moving plate, a first spring and a plurality of oblique rods, the movable plate is slidably connected to the inner side wall of the inner cavity, and the plurality of oblique rods are set in correspondence with the plurality of strip holes, one end of the oblique rod is hinged on the movable plate, and the other end of the oblique rod can pass through the The strip-shaped hole abuts against the inner wall of the anchor cable hole, one end of the first spring is fixedly connected to the bottom wall of the inner cavity, and the other end of the first spring is fixedly connected to the moving plate; The first push assembly corresponds to each slant rod, and a second push assembly for changing the inclination angle of the slant rod is arranged in the inner cavity.

The invention provides an ice and snow rapid melting anti-sliding device based on snowy slope parking, and relates to the technical field of anti-sliding. The problems that when an existing snowy slope anti-sliding device is used, the device can only be used for rear wheels, cannot be applied to front wheel fixing and cannot be automatically stressed and fixedly connected when a vehicle rotates are solved. The device comprises a main body, an inner groove and a stress piece; the main body is of a triangular structure, the front end of the main body is of an arc-shaped structure, and two rectangular protruding blocks are arranged on the two sides of the main body; and the inner groove is formed in the top end of the interior of the main body. The device is installed at the bottom of the front wheel of the vehicle for use; if the vehicle slides, the front wheel rotates, the stress piece can be stressed to move, the pressing plate can press the bottom of the turnover plate, the turnover plate can be stressed to turn over, then the inserting teeth are driven to turn over and move, the inserting teeth can make contact with the tires, then the front wheel of the vehicle stops rotating, and then the vehicle can be effectively blocked and fixed through contact between the bottom piece and the ground.

The invention discloses a clamping device with good firmness for drilling machine machining. The clamping device comprises a base, a support column is fixed to the top outer wall of the base through screws, and the top and bottom of the outer wall of one side of the support column are separately connected with a limiting wheel and a rotating wheel in a sleeved mode. A moving block sliding groove is formed in the outer wall of the top of the base, and the inner wall of the moving block sliding groove is slidably connected with a moving block. A threaded rod mounting hole is formed in the outerwall of one side of the base, and the inner wall of the threaded rod mounting hole is connected with a threaded rod in a sleeving mode. A working table is fixed to the top outer wall of the limiting wheel through screws, and a fixed clamping plate is fixed to one side of the top outer wall of the working table through screws. The distance between a sliding clamping plate and the fixed clamping plate and the distance between two sliding plates can be adjusted, a workpiece can be clamped and fixed from multi-directions, the improvement of the clamping firmness is facilitated, it is beneficial toimprove the operation convenience and the stability of the working table, and the possibility of workpiece movement during machining can be reduced.

The invention discloses a fixing structure of a porcelain insulator, comprises a support plate and a fixing box, the interior of the support plate is provided with a fixing groove inside. The two sides of the fixing groove are provided with clamping grooves, the fixing plates are fixedly connected between the two sides of the inner wall of the fixing box, the bottom of the fixing plate is fixedlyconnected with a first sliding rail, and the two sides of the outer surface of the first sliding rail are slidably connected with a first sliding block. The invention relates to the technical field ofporcelain insulators. Through the fixing structure of the porcelain insulator, the porcelain insulator can be conveniently and quickly disassembled and installed, the invention avoids that the existing porcelain insulators are all threaded through the threads arranged on the porcelain insulators in the use process and screws or other fixing parts are fixedly installed, so the installation and disassembly process is time-consuming and laborious, The fixing structure reduces the burden of the staff, reduces the working intensity, saves the time, and improves the working efficiency of the staff,and it is convenient for the staff to repair or replace the porcelain insulator.

The embodiment of the invention provides a transfer device for the obstetrics and gynecology department, and relates to the technical field of instrument transfer equipment. The transfer device for the obstetrics and gynecology department comprises a movable supporting mechanism and an equipment fixing mechanism, wherein the movable supporting mechanism comprises a bottom plate, a handrail, wheels and first roll shafts, the handrail is fixedly installed on one side of the top of the bottom plate, the wheels are installed on the two sides of the bottom of the bottom plate in a rolling mode correspondingly, a plurality of sets of first mounting grooves are formed in the top of the bottom plate, and the plurality of first roll shafts are rotationally mounted in the first mounting grooves correspondingly. The rotating first lead screw and the rotating second lead screw drive external sleeves to move face to face or back to back along the axial positions of the lead screws correspondingly, that is, the two moving sleeves drive the two side plates to move face to face or back to back. The two side plates moving face to face can be used for clamping and fixing instrument equipment on the bottom plate; and sponge pads can be arranged on the opposite sides of the side plates and used for protecting the side surfaces of the instrument equipment.

The invention discloses a dyeing method based on carbon dioxide supercritical dispersion mutual dissolution and belongs to the technical field of dyeing. According to the dyeing method based on carbondioxide supercritical dispersion mutual dissolution, CO2 is enabled to present a fluid state in a CO2 supercritical manner, thus, the effect of dissolving a coloring agent is achieved; after dyeing,CO2 is separated from the coloring agent; on the one hand, the investment of manpower and material resources in the later stage of treating printing and dyeing wastewater is effectively avoided; on the other hand, after the separation of CO2, the coloring agent is kept, thereby reducing the waste of the coloring agent effectively and improving the use rate; and meanwhile, through cooperative use of an assistant drying channel, a positioning gaseous disc, a ventilation positioning rod and a spiral laminated rolling frame in the dyeing process, the edges of the surface pores of cloth can be guaranteed not to be prone to being rubbed due to contact with the spiral laminated rolling frame during dyeing of the cloth, so that the uniformity of dyeing is effectively guaranteed, meanwhile, a blowing effect may be realized for the dyed cloth, the separation of the fluid CO2 is further accelerated, and the dyeing efficiency is effectively improved.

The invention discloses a splicing type building template for constructional engineering. The splicing type building template comprises four template bodies, two ends of one side of each template body are respectively provided with a detachable support assembly, each detachable support assembly comprises a support plate, a T-shaped plate and a stress plate, the stress plates are provided with limiting plates, first mounting grooves corresponding to the limiting plates are formed in the ground, and limiting pipes are mounted in the first mounting grooves; second mounting grooves are formed in the tops of the limiting plates, a plurality of through holes are formed in the side walls of the second mounting grooves, limiting blocks are slidably connected into the through holes, limiting grooves are formed in the inner walls of the limiting pipes, and the limiting blocks are inserted into the limiting grooves in a one-to-one correspondence mode; and a driving device for driving the plurality of limiting blocks to move is mounted in the second mounting grooves. According to the splicing type building template, the possibility that the building template moves can be reduced.

The invention discloses an efficient bleaching process for silk clothes, and belongs to the field of bleaching. Through the arrangement of spaced bleaching frames, a large number of bubbles can be generated near a pneumatic liquid stirring rod in cooperation with the operation of introducing inert gas during bleaching, on one hand, the bubbles can generate certain impact on silk, and the silk slightly floats in the bleaching liquid, so that the silk is in more sufficient contact with the bleaching liquid, and meanwhile, incomplete bleaching caused by mutual attachment of the silk is effectively avoided, and the bleaching effect is effectively improved; on the other hand, the fluidity of the bleaching liquid can be effectively improved through the bubbles, shuttling of molecules of the bleaching liquid on the silk is effectively accelerated, and the bleaching speed is remarkably accelerated; and in addition, under the cooperation of a self-sealing ball and an outer expansion air hole, the pneumatic liquid stirring rod is opened during air inflation and is closed on the contrary, one-way sealing of the pneumatic liquid stirring rod is effectively achieved, and bleaching liquid is not prone to permeating into the pneumatic liquid stirring rod.

The invention discloses a salary bill positioning and cutting device for financial management, and belongs to the technical field of financial management. The salary bill positioning and cutting device comprises a workbench. Two vertical plates are installed on the top of the workbench, a top plate is installed on the tops of the two vertical plates, and a cutter is arranged between the two vertical plates. An electric telescopic rod is installed at the position, corresponding to the cutter, of the top plate, and fixing devices are installed at the positions, corresponding to the cutter, of the vertical plates. Each fixing device comprises a threaded rod, a first rotary knob and a moving frame. The first rotary knobs are arranged on the two sides, far away from each other, of the two vertical plates, and each threaded rod is installed at the end, close to the corresponding vertical plate, of the corresponding first rotary knob. According to the salary bill positioning and cutting device, the fixing devices are arranged, and therefore the cutting device can fix salary bills with different sizes and different thicknesses when needed, positioning of the salary bills is facilitated, the possibility of movement of the salary bills is reduced, and then the practicability of the device is improved.

The invention discloses a long-acting stainless steel pipe sealing joint, which belongs to the field of pipe joints. It is a long-acting stainless steel pipe sealing joint. Through the setting of pre-sealed undulating pipes, during installation, the extrusion effect on the end of the stainless steel pipe Next, the pre-breaking magnetic rod is broken, the sealant in the overflow ring is released, and it overflows quickly, and the steel pipe is rotated to disperse evenly, thereby forming a layer of sealing barrier in the stainless steel pipe, and then through the liquid injected into the liquid injection port The rubber liquid, after solidification, forms a sealing layer that is integrated with the joint body between the end of the stainless steel pipe and the joint body, and becomes another layer of sealing barrier that is not extruded by the stainless steel pipe or subjected to little force. Compared with the existing technology, it significantly prolongs the sealing time and reduces the maintenance frequency. In addition, when in use, the undulating structure of the pre-sealed undulating tube can buffer the hydraulic pressure to a certain extent, improve the stability of the hydraulic pressure at the joint, and reduce the impact of the hydraulic pressure on the sealing layer. Intensity of influence.

The invention discloses a temporary supporting device for water conservancy ecological slope protection construction, and belongs to the technical field of ecological slope protection, the temporary supporting device comprises a bottom bin, a screw rod and a supporting frame, moving mechanisms are arranged on the two opposite sides, located on the screw rod, of the bottom bin, each moving mechanism comprises a hydraulic cylinder and a mounting plate, and the hydraulic cylinders are mounted on the bottom bin; the mounting plate is mounted on a piston rod of the hydraulic cylinder and is in sliding fit with the side wall of the bottom bin, and rollers are mounted at two opposite ends of one side, close to the ground, of the mounting plate. The device has the beneficial effects that workers can carry the device conveniently, and therefore the working intensity of the workers can be reduced.

The invention provides a combined table of amplification, illumination, supporting and clamping for manual soldering. The combined table comprises an amplification and illumination component and a circuit board clamping and supporting mechanism, wherein the amplification and illumination component is coordinated with the circuit board clamping and supporting mechanism for use; the amplification and illumination component comprises a magnifying lens base of a liquid injection table type and a liquid-injection magnifying lens shell; and the liquid-injection magnifying lens shell is disposed on the magnifying lens base of the liquid injection table type by an angle adjustable mechanism. The combined table provided by the invention is applied to staff training, student innovation experiments,fabrication, small-batch product trial production and electric appliance repair concerning electronic component soldering, and even design concept verification and exploratory research under some simple and crude conditions. Manual soldering has the striking problems that it is hard to consider all the conditioners; and no practical and feasible method which can liberate an operator from contrarycontradiction demands for expecting to realize soldering with soldering bit holding, feeding of a solder wire, clamping of components and parts, pressing of a circuit board for prevention of slippageand the like is proposed. The combined table provided by the invention makes bold attempts and efforts in the aspect.

The invention discloses a construction method of a river channel drainage basin flood prevention dam, and belongs to the technical field of dam construction, and the construction method comprises the following steps: S1, a slope surface in front of a flood prevention wall is desilted and levelled; S2, paying off and positioning are conducted, the boundary of the slope surface is excavated, and a groove is processed; S3, polypropylene filament yarn woven cloth is thrown in front of the flood prevention wall, and then rock blocks are thrown and packed in front of the flood prevention wall; S4, net bag gabions are adopted at the slope toes for protecting the toes; S5, a connecting device is installed between every two adjacent net bag gabions; and S6, the upper portion of the riprap is leveled through bagged gravel, and then film bag concrete is used for surface protection. After constructors place the net bag gabions one by one, the adjacent net bag gabions are connected through connecting devices, so that the multiple net bag gabions are connected, when water flow in a river is large, the multiple net bag gabions are connected, and then the possibility that the net bag gabions move in a water area can be reduced.

The invention discloses a construction steel pipe transportation carriage device capable of preventing accidents. The device comprises a transportation carriage, a cavity is formed in the transportation carriage, buffer grooves are symmetrically formed in the cavity up and down in a communicating mode, a fixing device is arranged between the cavity and the buffer grooves and comprises a fixing block connected with the corresponding buffer groove in a sliding mode. A buffer spring is connected between the fixing block and the buffer groove, a steel pipe is inserted into the connecting groove toabut against the sliding connection blocks, and therefore the oil pressure of the oil pipe is increased, the sliding blocks are made move close to each other, the clamping blocks stretch into the clamping grooves under the action of the pressure spring, and the clamping blocks clamp the steel pipe.

The invention discloses an English listening training device for college English teaching. The invention belongs to the technical field of English listening training. The device comprises a bracket, the outer surface of the bracket is sleeved with two fastening lantern rings, supporting rods are fixedly connected to the lower surfaces of the two fastening lantern rings; the bottom ends of the twosupporting rods are jointly and fixedly connected with a placing plate, the upper surface of the placing plate is fixedly connected with a driving device; one end of the front face of the driving device is fixedly connected with the back face of a cam, the outer surface of the cam is in lap joint with the upper surface of an extrusion plate, two through holes are formed in the placing plate, and two connecting rods fixedly connected with the lower surface of the extrusion plate penetrate through the through holes to be fixedly connected with the upper surface of a striking plate. According tothe invention, a user can select whether to continue learning or not after waking up, the training effect of the user is not easily affected, and a certain burden is not easily caused to eardrums dueto the continuous wearing of earphones in the sleeping process of the user.

The invention relates to an anti-seepage subway tunnel segment which is installed in a tunnel, the segment comprises segment bodies, inserting holes and inserting grooves corresponding to the inserting holes are formed in the lower surfaces of the segment bodies, the two segment bodies are fixed through bolts, and installation grooves and matching grooves are formed in the segment bodies; a plurality of abutting springs are fixedly connected to the groove bottom wall of the mounting groove, a sealing block is jointly and fixedly connected to the abutting springs, the sealing block is slidably inserted into the mounting groove, a mounting hole penetrating through the sealing block is formed in the upper surface of the sealing block, and two sleeves are slidably connected into the mounting hole; a plurality of sealing springs are fixedly connected to the inner bottom wall of the sleeve, a sealing plate is jointly and fixedly connected to the sealing springs, the sealing plate is inserted into the sleeve in a sliding mode, and when the sealing springs are in a natural state, the sealing plate protrudes out of the sealing block. The method has the effect of reducing the adverse effect on the service life of the equipment in the tunnel.

The invention provides a high-precision press fitting tool for a camshaft timing gear and a signal panel, and belongs to the technical field of mechanical equipment manufacturing and assembling. The high-precision press fitting tool for the camshaft timing gear and the signal panel comprises a bottom plate, a clamping mechanism, a moving mechanism and a pressing head; and the clamping mechanism comprises a first positioning base and a second positioning base, and the first positioning base and the second positioning base are both installed on the surface of the bottom plate. According to the high-precision press fitting tool, the cam shaft is clamped and fixed through a clamping device, the possibility of movement of the cam shaft is reduced, the press fitting process is more stable and accurate, in addition, a third positioning base and the pressing head are connected together through cooperation of a connecting pin and a flange, the pressing head is more convenient to disassemble andassemble, an operator can install pressing heads of different specifications according to the specifications of workpieces such as a timing gear and a signal panel, the possibility of press fitting failure caused by mismatching of the specifications of the pressing head and the workpiece is reduced, and the press fitting stability can be improved.