37results about How to "Running trajectory is stable" patented technology

A high-speed carding machine comprises a base and a vibration wool feeding machine, a high-speed carding device and an automatic three-position barrel changing device which are connected with one another sequentially. The vibration wool feeding machine in the high-speed carding machine utilizes a translational vibration plate and a baffle to push textile raw materials uniformly, and moreover, the falling and outputting speeds of the textile raw materials are increased. A shaft seat of the high-speed carding machine is arranged on a breast cylinder wallboard and a large cylinder wallboard, so that the phenomenon that the positions of a breast cylinder and a large cylinder are changed relatively to the positions of a working roller and a wool stripping roller due to the high-speed rotation is avoided, the production quality is ensured, a suction pipe is arranged to suck the textile raw materials and reduce air flow which is generated by high-speed rotation, and the operation stability and high speed of the carding machine are ensured. The automatic three-position barrel changing device can control rotating wheels to change collection barrels, so that the high-speed carding machine is simple in structure and the labor intensity of the working personnel is reduced; and a U-shaped guardrail can ensure that the operation tracks of the collection barrels are stable when the collection barrels are changed, so that the whole barrel changing operation is carried out stably, and the collection barrels are prevented from tipping over during the barrel changing process.

The present invention relates to a tubular motor manual electric clutch controller. An arc rack is matched with a spur gear at a rotating rod and a pulley at a slide rod. A smaller traveler at the slide rod is matched with a slide way buckle which is connected with an external end cover. The slide rod is equipped with one or more than one pulley and is connected with a pull rod with a spring. The arc rack is connected with a rotating shaft which is provided with a torsional spring. The rotating shaft is fixed on an internal end cover. The original slide rod is decomposed into two independently moving parts of the slide rod and the arc rack to reduce the spring. The slide rod is provided with a bevel and is equipped with the pulley. The movement of the slide rod is changed into the sliding of the pulley. The pulley can be departed from or pressed on the arc rack just by very short distance of the movement of the pull rod. The arc rack rotates for certain degrees along the rotating shaft and can be departed from or be meshed with the spur gear. The tubular motor manual electric clutch controller can achieve the great just by few pull. The tubular motor manual electric clutch controller is a manually operated controller saving most labor at the prior market and has simple and compact structure and low cost. The tubular motor manual electric clutch controller can be installed at rolling doors with different specifications and sizes and has fast pulling speed and high efficiency.

The invention discloses a stable and reliable automatic unlocking device for a drawer in a cash register box, which comprises a box body and a bottom plate arranged on the box body; an electromagnet is arranged on the bottom plate, an iron core is movably arranged in the electromagnet, a retainer ring is arranged on the iron core, a reset spring is nested in the iron core at the inner side of theretainer ring, a strip-shaped draw bar hole is arranged in the iron core at the outer side of the retainer ring, the bottom plate is also provided with a rotating pin, a swing plate is movably arranged on the rotating pin, a striking head for unlocking is arranged at the outer side of the swing plate, both ends of the swing plate are respectively provided with a protruding outward draw bar and anupright downward limit bar, the draw bar protrudes into a draw bar hole, the bottom plate is also provided with a circular arc-shaped limit hole, and the limit bar protrudes into the limit hole. The automatic unlocking device is mainly used for the cash register box in which the drawer can be automatically opened.

The invention discloses a weft knitting mechanism which comprises an upper door ring and a lower door ring, wherein a shuttle boat is arranged between the upper door ring and the lower door ring; the shuttle boat is provided with an upper shuttle wheel and a lower shuttle wheel; the outer edges of the upper door ring and the lower door ring are connected with each other by a warp separating device; two guide devices are respectively arranged between the upper door ring and the shuttle boat as well as between the lower door ring and the shuttle boat; the upper shuttle wheel arranged on the shuttle boat is connected with the lower side of the upper door ring by the guide device; the lower shuttle wheel arranged on the shuttle boat is connected with the upper side of the lower door ring by the guide device; and at least one of the upper shuttle wheel and the lower shuttle wheel is connected with the shuttle boat by a regulating mechanism. The weft knitting mechanism has the beneficial effects of being simple in structure, reasonable in design, convenient to manufacture, lower in driving resistance, low in noise and abrasion and free from yarn break, thus improving the knitting quality of products.

The invention relates to a shielding cover of a tunnel inspection vehicle, which comprises a cover body and a support frame, wherein the support frame is fixed on two sides of a vehicle body of the inspection vehicle; the cover body is in folding split type; the cover body is constituted by two vertical side surfaces and an arc-shaped top surface, two ends of the arc-shaped top surface are respectively connected with the upper ends of the two vertical side surfaces, and the cover body is in the shape of inverted U; the two vertical side surfaces are parallel to each other and respectively fixed on the outer sides of the support frame; slide rails for constituting a sliding pair with the support frame are fixedly arranged at the lower parts on the two sides of the vehicle body of the inspection vehicle; the support frame comprises a plurality of support rods connected together through a ratchet wheel tensioning mechanism; the support frame is in the folding split type; two fixed ends of the support frame are respectively fixedly connected with connecting iron welded on the vehicle body of the inspection vehicle through first fasteners; and transverse rollers matched with the slide rails are arranged at the lower ends of part of the support rods of the support frame, and longitudinal rollers are arranged at the lower ends of other support rods of the support frame. The shieldingcover can protect testing equipment on the tunnel inspection vehicle and plays a role in decorating the vehicle.

The invention discloses a multifunctional tire with functions of climbing steps and driving on a level ground and a using method thereof. A traditional tire does not have climbing capability. A slideway plate is provided with n slideways and spring hanging columns I, which are uniformly distributed along the circumference of an axle sleeve; a slide pair is formed by each slideway and a spring hanging column II at the inner end of a connecting part; each spring hanging column II is connected with the corresponding spring hanging column I through a spring; a rigid rack is fixed at the outer endof the connecting part; a roller is supported against the pin roll connecting the rigid rack and the connecting part through a bearing; a cam pair is formed by a cam and all rollers; when the rollersrun on the return section of the cam, the connecting part, rollers and a tire body are pulled to the spoke center along the slideway of the spoke by means of the pulling force of a spring; and when the rollers move on an extending stroke section of the cam, the connecting part, rollers and tire body are far from the spoke center along the slideway of the spoke. The multifunctional tire can be usedon a level ground for wheelchairs, baby carriage and other carriers, has smaller overturning angle when climbing steps in comparison with that of a traditional tire, and is more stable.

The invention relates to automation tube shoulder injection equipment. The equipment comprises a frame, a feeding mechanism and an injection molding machine, wherein the frame is arranged on one sideof the injection molding machine; the feeding mechanism is arranged at an input end of a feeding and discharging device; the frame is provided with a feeding grasping device, the feeding and discharging device and a clamping translation transfer carrying device; the feeding grasping device is installed on one side of the feeding mechanism and also installed at the input end of the feeding and discharging device; and the clamping translation transfer carrying device is installed above an intermediate transition tool of the feeding and discharging device. The automation tube shoulder injection equipment is suitable for the production of toothpaste hoses, shoe oil hoses, glue hoses, cosmetic hoses and the like. Therefore, the automation tube shoulder injection equipment has the advantages such as reasonable structure, good precision, low cost and high efficiency.

The invention discloses a fresh tea sorting device and method. The sorting device comprises a transparent conveying belt, a feeding device, an identification device and a removing device, wherein thefeeding device is positioned on the upstream of the transparent conveying belt, the removing device is positioned on the downstream of the transparent conveying belt, and the identification device isused for identifying fresh tea on the transparent conveying belt. The sorting method comprises the following steps of placing the fresh tea on the transparent conveying belt; identifying the fresh tea on the transparent conveying belt; and sorting the fresh tea according to the identification result after the fresh tea is separated from the conveying belt. By adoption of the tea sorting device and method, the fresh tea can be shot and identified on the transparent conveying belt, the bad fresh tea is removed from the fresh tea on the downstream of the transparent conveying belt, when the fresh tea is on the transparent conveying belt, the fresh tea is static relative to the transparent conveying belt, so that influence from external factors is small; and after being thrown out on the downstream of the transparent conveying belt, the bad tea is removed from the fresh tea, the operation track of the fresh tea is stable, and thus the sorting effect of the fresh tea can be guaranteed.

The invention discloses a circuit breaker shell and a circuit breaker equipped with the same. At least two ventilating channels are formed between an access terminal accommodating region and an arc extinguish chamber accommodating region. Electric arc passes through the arc extinguish chamber and then enters the multiple ventilating channels through an electric arc inlet, so that the probability of re-arcing is lowered and the electric arc maintaining time is shortened; and therefore, the back breakdown phenomenon of the circuit breaker can be prevented fundamentally, and the breaking capability and the safety of the circuit breaker in use are improved.

A three-position automatic barrel changing device comprises a base and a rotary barrel changing device, wherein the rotary barrel changing device is arranged on the base; a supporting column is perpendicularly arranged at the rear of the base; a coiler is arranged on the top of the supporting column; an auxiliary supporting column is arranged at the rear of the upper surface of the coiler; a cross rod is horizontally arranged on the top of the auxiliary supporting column, and is provided with a length measuring sensor and a guiding roll; two supports are symmetrically arranged on two sides of the front of the base; a U-shaped guard bar with a forward opening is arranged between the two supports; the rear end of the U-shaped guard bar is connected with the supporting column; the rotary barrel changing device is arranged in the U-shaped guard bar; and the length measuring sensor is connected with the rotary barrel changing device. A rotating wheel can be controlled by the rotary barrel changing device of the three-position automatic barrel changing device, so that collecting barrels can be changed. The three-position automatic barrel changing device is simple in structure; the labor intensity of workers is reduced; the work efficiency is improved; stableness of the running track of the collecting barrels can be guaranteed by the U-shaped guard bar when the collecting barrels are changed; the whole barrel changing operation is stable; and the problem that the collecting barrels turn over in a barrel changing process is solved.

The invention discloses a track robot walking mechanism. The track robot walking mechanism comprises a main body frame, a walking supporting wheel system, a driving wheel system, a power assembly, an assembling shaft, a transmission assembly, a transmission assembly output shaft, a pressure spring and a load mounting end, wherein the walking supporting wheel system comprises a track wheel support and track wheels; and the driving wheel system comprises a driving wheel supporting frame, driving wheels, a transmission chain and chain wheels. Part of load force is converted into positive pressure of the driving wheel system on a track and pressure between the track wheels and the inner wall of the track through a connecting rod mechanism. The positive pressure of the driving wheel system on the track is increased, and friction force between the driving wheel system and the track is increased. The friction force between the driving wheel system and the track is in direct proportion to a load, and finally the self-locking effect that the heavier the load is, the larger the friction force between the driving wheel system and the track is achieved. The situation that the driving wheels slip when a track robot climbs a slope with a heavy object is avoided, and the operation stability and safety of the track robot are improved.

The invention relates to a ground detection robot which comprises a carrier (1), a data acquisition module (2), a sensing module and a control system (4), the carrier (1) comprises a frame vehicle body (11) and a walking mechanism (12), and the data acquisition module (2) and the sensing module are both arranged on the carrier (1). According to the invention, integrated development of artificial intelligence and metering services can be realized.

The present invention relates to a tubular motor manual electric clutch controller. An arc rack is matched with a spur gear at a rotating rod and a pulley at a slide rod. A smaller traveler at the slide rod is matched with a slide way buckle which is connected with an external end cover. The slide rod is equipped with more than one pulley and is connected with a pull rod with a spring. The arc rack is connected with a rotating shaft which is provided with a torsional spring. The rotating shaft is fixed on an internal end cover. The original slide rod is decomposed into two independently moving parts of the slide rod and the arc rack to reduce the spring. The slide rod is provided with a bevel and is equipped with the pulley. The movement of the slide rod is changed into the sliding of the pulley. The pulley can be departed from or pressed on the arc rack just by very short distance of the movement of the pull rod. The arc rack rotates for certain degrees along the rotating shaft and can be departed from or be meshed with the spur gear. The tubular motor manual electric clutch controller can achieve the great just by few pull. The tubular motor manual electric clutch controller is a manually operated controller saving most labor at the prior market and has simple and compact structure and low cost. The tubular motor manual electric clutch controller can be installed at rolling doors with different specifications and sizes and has fast pulling speed and high efficiency.

The invention provides a circular track crane and an automatic operation rectifying system thereof. The circular track crane comprises a bridge frame and four sets of operation components arranged at the lower part of the bridge frame; under drive of the four sets of operation components, the circular track crane rotates on a circular track around the axis of the circular track; a circular safety shell is arranged around the circular track on the outer side of the circular track; and the automatic rectifying system comprises at least two sets of information acquiring components respectively used for acquiring operation information of at least two sets of adjacent operation components, a control device for receiving information acquired by the at least two sets of information acquiring components, and four sets of actuation components for respectively driving the four sets of operation components to operate. The automatic operation rectifying system of the circular track crane enables the driving rotating speeds of the four sets of operation components to be different through determining a walking trajectory and an inclined direction of the crane by calculation and adjustment of the control device, so that automatic rectification is finally realized, and the accuracy and the stability of the operation trajectory of the crane are guaranteed.

The invention belongs to the technical field of automobile manufacturing and particularly relates to a reinforcing iron sheet automatic mounting device for an automobile door handle cover. The reinforcing iron sheet automatic mounting device for the automobile door handle cover is characterized in that a door handle cover positioning mechanism, a reinforcing iron sheet limiting block, a working mechanism, a door handle cover clamping mechanism and a pneumatic double-control controller are fixedly connected to a fixed bottom plate. The reinforcing iron sheet automatic mounting device for the automobile door handle cover solves the problems that due to the phenomena of tedious operation, large labor intensity, long beat time and easiness in installation without being in place by manually adopting a reinforcing iron sheet of the door handle cover, the reinforcing iron sheet after installation deforms with potential safety hazards, and the door handle cover is easily damaged to cause scrapof a product and has the beneficial effects that by adopting the door handle cover positioning mechanism for positioning, the door handle cover clamping mechanism for clamping and the working mechanism and the pneumatic double-control controller for realizing feeding or material returning, the structure is compact, mounting of a special-shaped door handle cover reinforcing iron sheet can be adapted, and the mounting efficiency, accuracy and safety of the automobile door handle cover reinforcing iron sheet are improved.

The invention discloses a method for mounting and dismounting a large liquid crystal display panel. The method comprises: (1), a fixed base, an overturning mechanism, a horizontal pushing mechanism, and a positioning component are set; (2), the horizontal pushing mechanism overturns downwardly at an angle; (3), a large liquid crystal display panel is arranged in the positioning component at the horizontal pushing mechanism; (4), the overturning mechanism drives the horizontal pushing mechanism and the large liquid crystal display panel to overturn upwardly and thus the horizontal pushing mechanism is in a horizontal state; (5), the large liquid crystal display panel moves forwardly and horizontally to a front stop position; (6), the large liquid crystal display panel moves backwardly and horizontally to a rear stop position; and (7), the horizontal pushing mechanism and the large liquid crystal display panel overturn downwardly. A large liquid crystal display panel carrying part formed by two L-shaped aluminum strips is used for supporting the liquid crystal display panel, thereby eliminating the sucking trace of the octopus sucking disk on the panel. The horizontal pushing mechanism overturns and thus the liquid crystal display panel extends into a table top of a metallographic microscope or is pulled out of the table top of the metallographic microscope by the horizontal pushing mechanism; and the whole operation track is stable and accurate, so that the damages of the panel and the microscope can be avoided.

The invention discloses a manual edge rolling device for an automobile body-in-white stamping part, which comprises a rack, a workpiece forming die arranged on the rack, at least one raceway trolley arranged on the workpiece forming die and edge rolling rollers correspondingly arranged on the raceway trolleys, and a supporting and positioning structure for stably positioning a workpiece is arranged on the rack. A raceway used for guiding the raceway trolleys is arranged on the workpiece forming die, trolley handles are arranged on the raceway trolleys, and the roller angle of the edge rolling rollers is consistent with the to-be-rolled edge angle of the workpiece. The edge rolling rollers are arranged on the raceway trolleys through self-locking mechanisms. The number of the raceway trolleys and the edge rolling rollers with different roller angles can be set according to the requirements of machining procedures, the structure is simple, operation is convenient, installation and adjustment are convenient, the raceway trolleys can be repeatedly used, time and labor are saved when the raceway trolleys run along a rail, the machining cost is reduced, and the manual edge rolling device for the automobile body-in-white stamping part is more suitable for flexible machining of multi-vehicle-type small-batch stamping parts.

A trash can lifting device, comprising: a support frame, a trash can bracket located on the front side of the support frame, a lifting guide rail set on the front side of the support frame and having the same path as the support frame and arranged side by side, and arranged on the front side of the support frame and The hydraulic transmission assembly located in the middle of the two lifting guide rails; the garbage can lifting device also includes: a moving assembly located between the garbage can bracket and the support frame, and a cleaning assembly; the moving assembly is controlled by the hydraulic transmission assembly and drives the garbage The bucket bracket moves along the lifting guide rail, the top of the moving assembly is hinged with the trash can bracket, and the two sides of the moving assembly are provided with connecting rods connected with the top of the trash can bracket, and the two ends of the connecting rod are respectively connected to the The mobile component and the trash can bracket are hinged. Through the garbage can lifting device of the present invention, the stuck phenomenon of the garbage can bracket during operation is avoided, and the stability of the garbage can lifting device itself is guaranteed.

The invention discloses a turning over device, which belongs to the technical field of casting production. The turning over device comprises a turnover mechanism, a bearing mechanism and a pushing mechanism arranged sequentially. A feed box tray capable of moving onto the turnover mechanism is arranged on the bearing mechanism; a first hydraulic rod for pushing the feed box try is arranged on thepushing mechanism; and the turnover mechanism comprises a fixing support, a turnover body fixed onto the fixing support and capable of anticlockwise turning over, and a second hydraulic rod for pulling the turnover body. The invention provides the turning over device novel in structure, convenient to use, and capable of effectively improving the working efficiency and ensuring the production safety at the same time.

The invention provides a sintering machine deviation measuring and adjusting method, which specifically comprises the following steps of: 1, placing a datum line by taking a head wheel and a tail wheel of a sintering machine as a center, respectively placing a parallel line by taking the axis of the head and the axis of the tail of the sintering machine to detect whether a head wheel slide way and a tail wheel slide way of the sintering machine are on the same datum line or not, and measuring horizontal and elevation deviations of a track and the slide way; 2, measuring the horizontal elevation by using the synchronism of the head star wheel toothed plate and the tail toothed plate of the sintering machine to obtain a deviation value; according to the method, the running track of the sintering machine is stable, the phenomena of track gnawing caused by deviation and trolley wheel abrasion are avoided, the deviation phenomenon is fundamentally solved, the running track of a trolley is basically a straight line, the track gnawing phenomenon is solved, and the service life of the trolley is prolonged. And the upper sliding plate and the lower sliding plate are uniformly and flatly abraded.

An ecological energy-saving building comprises a house body. Vertical first hydraulic rods are fixedly mounted at the two corners, close to the rear side, of the top of the house body correspondingly;vertical second hydraulic rods are fixedly mounted at the two corners, close to the front side, of the top of the house body correspondingly; an inclined plate is arranged on the top of the house body, and lantern rings are mounted on movable rods of both the first hydraulic rods and the second hydraulic rods through bearings in a sleeving mode correspondingly; a telescopic rod is arranged between the corner of each inclined plate and the side of the corresponding lantern ring; and the end of a fixing rod of each telescopic rod is fixedly connected with the corresponding corner of the inclined plate. According to the ecological energy-saving building, the angle of a solar electricity-generation plate can be adjusted automatically in a reciprocating mode, sunlight can keep a good irradiation angle to the solar electricity-generation plate at different times of the day, thus the electricity-generation efficiency of the solar electricity-generation plate is improved, more electric energyis stored through a storage battery, stored electric energy is used for daily life, and the more-intelligent ecological energy-saving building is built.

The invention discloses a garbage can lifting device. The garbage can lifting device comprises a supporting frame, a garbage can bracket located on the front side of the supporting frame, lifting guide rails which are arranged on the front side of the supporting frame, have the same path as the supporting frame and are arranged side by side, and a hydraulic transmission assembly arranged on the front side of the supporting frame and located between the two lifting guide rails; the garbage can lifting device further comprises a moving assembly located between the garbage can bracket and the supporting frame and a cleaning assembly; and the moving assembly is controlled by the hydraulic transmission assembly and drives the garbage can bracket to move along the lifting guide rails, the top end of the moving assembly is hinged to the garbage can bracket, connecting rods connected with the top end of the garbage can bracket are arranged on the two sides of the moving assembly, and the two ends of each connecting rod are hinged to the moving assembly and the garbage can bracket correspondingly. By means of the garbage can lifting device, the phenomenon that the garbage can bracket gets stuck during operation is avoided, and the stability of the garbage can lifting device is guaranteed.

The invention provides an internal feeding tool. A tool bar is fixedly connected into the front section of a central through hole in a tool seat through a tool bar locking part. A tool bit is arranged in a radial groove in the front section of a central hole in the tool bar. A guiding slope at the inner end of the tool bit is matched with a tool bar ejector rod penetrating into the central hole of the tool bar to enable the tool bar ejector rod to push the tool bit to stretch out of the tool bar along the radial groove. The front section of the tool bar is sleeved with a tool bar guiding sleeve with the outer diameter being adaptive to the inner hole size of a machined workpiece. Tool feeding precision is high, and the cutting process is stable. The tool bar is inserted into a hole of the workpiece to be machined and is positioned through the tool bar guiding sleeve, repeated adjustment of the concentricity is not needed, and positioning is convenient. The guiding sleeve enables the moving track of the tool bar relative to the machined workpiece to be stable, machining precision is high, the levelness of a machined surface is good, and key groove machining symmetry is improved. The tool cost is low, machining and manufacturing is convenient and rapid, and the tool can be suitable for different machining hole diameters and key groove widths and can machine arc grooves and spiral grooves in blind holes and stepped holes.

The invention discloses a multifunctional tire with functions of climbing steps and driving on a level ground and a using method thereof. A traditional tire does not have climbing capability. A slideway plate is provided with n slideways and spring hanging columns I, which are uniformly distributed along the circumference of an axle sleeve; a slide pair is formed by each slideway and a spring hanging column II at the inner end of a connecting part; each spring hanging column II is connected with the corresponding spring hanging column I through a spring; a rigid rack is fixed at the outer endof the connecting part; a roller is supported against the pin roll connecting the rigid rack and the connecting part through a bearing; a cam pair is formed by a cam and all rollers; when the rollersrun on the return section of the cam, the connecting part, rollers and a tire body are pulled to the spoke center along the slideway of the spoke by means of the pulling force of a spring; and when the rollers move on an extending stroke section of the cam, the connecting part, rollers and tire body are far from the spoke center along the slideway of the spoke. The multifunctional tire can be usedon a level ground for wheelchairs, baby carriage and other carriers, has smaller overturning angle when climbing steps in comparison with that of a traditional tire, and is more stable.

The invention provides a wind power generation device which comprises fan blades, a fan wheel hub and a wind wheel shaft. A wind wheel is arranged on the front part of a main body, and the wind wheelis connected with the main body in a interference connection mode. The wind wheel shaft is arranged in the middle of the front part of the wind wheel, and the wind wheel shaft is movably connected with the wind wheel. The wind wheel hub and a wheel seat are arranged outside the wind wheel shaft, and the wind wheel shaft is connected with the wind wheel hub and the wheel seat in a penetrating mode.A nut is arranged at the outer end of the front part of the wind wheel shaft, and the nut is rotationally connected with the wind wheel shaft. The fan blades are arranged on the front part of the wind wheel hub, and the fan blades are connected with the wind wheel hub through bolts in a fastened mode. A through hole is formed in the middle of the interior of the wind wheel hub. By improving the structure and combining with the existing technology, the device has the advantages of being high in wind resistance performance and small in size and can be installed rapidly, problems and deficiencies in the prior device technology are solved, and the purpose of higher practicability is achieved.

The invention discloses a cam-connecting rod type mechanical three-dimensional parking device comprising cams fixed to the ground, driving shafts rotatably mounted on the cams, a car dragging plate horizontally moving in an inverted-L-shaped track, a connecting rod assembly in transmission connection between the driving shafts and the car dragging plate, and a power device for driving the drivingshafts to rotate so as to enable the connecting rod assembly to drive the car dragging plate to horizontally move in an inverted-L-shaped track. The connecting rod assembly comprises a driving connecting rod assembly and a balance connecting rod assembly. A vertical space can be fully utilized by means of the structure, the number of parking spaces is increased twice under the condition that no additional road area is occupied and parking on original parking spaces is not affected, and meanwhile, different driving devices adopted for maintaining synchronism are omitted, the failure rate is lowered, and the safety coefficient is increased.

The invention discloses a stable and reliable automatic unlocking device for a drawer in a cash register box, which comprises a box body and a bottom plate arranged on the box body; an electromagnet is arranged on the bottom plate, an iron core is movably arranged in the electromagnet, a retainer ring is arranged on the iron core, a reset spring is nested in the iron core at the inner side of theretainer ring, a strip-shaped draw bar hole is arranged in the iron core at the outer side of the retainer ring, the bottom plate is also provided with a rotating pin, a swing plate is movably arranged on the rotating pin, a striking head for unlocking is arranged at the outer side of the swing plate, both ends of the swing plate are respectively provided with a protruding outward draw bar and anupright downward limit bar, the draw bar protrudes into a draw bar hole, the bottom plate is also provided with a circular arc-shaped limit hole, and the limit bar protrudes into the limit hole. The automatic unlocking device is mainly used for the cash register box in which the drawer can be automatically opened.