CN215846786U

CN215846786U - Automatic screw locking device of electronic sphygmomanometer

Info

Publication number: CN215846786U
Application number: CN202023345852.4U
Authority: CN
Inventors: 汪陈晨
Original assignee: Kunshan Fulirui Electronic Technology Co ltd
Current assignee: Kunshan Fulirui Electronic Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-02-18
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses an automatic screw locking device of an electronic sphygmomanometer, which comprises a rack, a feeding mechanism, a product carrier, a carrier circulating conveying line, a plurality of screw locking mechanisms, a discharging mechanism and a no-load tool return line, wherein the feeding mechanism, the product carrier, the carrier circulating conveying line, the plurality of screw locking mechanisms, the discharging mechanism and the no-load tool return line are arranged on the rack, the carrier fixed with a product is automatically transplanted onto the carrier circulating conveying line by the feeding mechanism, the product carrier is automatically conveyed by the conveying device to sequentially pass through the plurality of screw locking stations, a pressing unlocking station and a discharging station from the feeding station, the products are automatically locked by the plurality of screw locking mechanisms in the product carrier circulation process, the pressing unlocking mechanism automatically releases the pressing mechanism from fixing the product, and the discharging mechanism places the product carrier on the no-load tool return line through a discharging clamping jaw and places the product of the carrier on a discharge port. The automatic screw locking device of the electronic sphygmomanometer is compact in structure and ingenious in design; and the efficiency of locking the screw is greatly improved, the manpower is saved, and the assembly quality of the product is ensured.

Description

Automatic screw locking device of electronic sphygmomanometer

Technical Field

The utility model belongs to the technology of automatic assembly equipment, and particularly relates to an automatic screw locking device of an electronic sphygmomanometer.

Background

The electronic sphygmomanometer is a medical device for measuring blood pressure by using modern electronic technology and an indirect blood pressure measuring principle. At present, electronic sphygmomanometer is in the assembling process, and devices such as its inside keypad, circuit board and LCD screen all need assemble through the screw, however present above-mentioned inside device all adopts the manual work to assemble, has the shortcoming that packaging efficiency is low, the human cost is high and the defective index is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an automatic screw locking device of an electronic sphygmomanometer, which aims to solve the problems of low assembly efficiency, high labor cost and high defective product rate of internal devices of the electronic sphygmomanometer in the prior art which are manually assembled.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an automatic screw locking device of an electronic sphygmomanometer, which comprises a frame, a feeding mechanism, a product carrier, a carrier circulating conveying line, a plurality of screw locking mechanisms, a discharging mechanism and an idle tool return line, wherein the feeding mechanism, the product carrier, the carrier circulating conveying line, the plurality of screw locking mechanisms, the discharging mechanism and the idle tool return line are arranged on the frame,

the product carrier is provided with a pressing mechanism for fixing the product,

the feeding mechanism comprises a feeding conveying line, a first lifting mechanism and a carrier transplanting mechanism, the first lifting mechanism can be arranged at the discharge end of the feeding conveying line in a lifting mode and comprises a lifting platform and a first lifting driving module, the carrier transplanting mechanism comprises a second lifting mechanism, a first transverse moving mechanism and a first carrier clamping jaw, the second lifting mechanism is connected to the first transverse moving mechanism, the first carrier clamping hand is arranged on the second lifting mechanism,

the carrier circulating conveying line comprises a conveying device, a feeding station, a plurality of screw locking stations, a pressing and unlocking station and a discharging station, wherein a positioning mechanism for positioning the product carrier when locking a screw is arranged on one side of each screw locking station on the rack, the plurality of screw locking mechanisms are arranged corresponding to the plurality of screw locking stations, a pressing and unlocking mechanism for fixing the product by removing the pressing mechanism is arranged on one side of the pressing and unlocking station,

the blanking mechanism is arranged at the blanking station and comprises a blanking robot and a blanking clamping jaw used for respectively placing a product and a product carrier on an idle tool return line and a discharge hole, the blanking clamping jaw is arranged at the driving end of the blanking robot,

during operation, a product is manually pressed and fixed on a product carrier and then placed on a feeding conveying line, the lifting platform conveys the product carrier to a material taking position, a first carrier clamping jaw grabs the product carrier and then transplants the product carrier onto a feeding station through a second lifting mechanism and a first transverse moving mechanism, the conveying device automatically conveys the product carrier to sequentially pass through a plurality of screw locking stations, a pressing unlocking station and a discharging station from the feeding station, the screw locking mechanisms automatically lock screws on the product in the product carrier circulation process, the pressing unlocking mechanism automatically releases the pressing mechanism to fix the product, and the discharging mechanism places the product carrier on a no-load tool return line through the discharging clamping jaw and places the product of the carrier on a discharge port.

As a further improvement of the scheme, a detection station is arranged between the compressing and unlocking station and the discharging station on the carrier circulating conveying line, and a detection device used for detecting whether the product is locked by the screw is arranged on the detection station.

As a further improvement of this scheme, the product carrier includes the carrier body, two outer grooves have been seted up on two relative lateral walls of carrier body correspondingly, just the middle part of carrier body is provided with the die cavity that is used for fixing a position the product, two inner groovies have been seted up on two relative inside walls of die cavity correspondingly.

As a further improvement of the present solution, the pressing mechanism includes a pressing plate and a turnover limiting seat, the turnover limiting seat is fixed on the carrier body, the pressing plate is hinged to the turnover limiting seat through a hinge shaft and can be selectively located in a horizontal state and a vertical state, the pressing plate fixes the product on the product carrier in the horizontal state, and the pressing plate releases the fixation of the product on the product carrier in the vertical state.

As a further improvement of the scheme, the first traverse mechanism comprises a transplanting frame, a traverse driving module is fixed on the transplanting frame, a traverse connecting plate is assembled on the traverse driving module in a transversely moving manner, the second lifting mechanism comprises a lifting plate which is arranged on the traverse connecting plate in a lifting manner, the lifting plate is connected with a lifting driving cylinder, a cantilever extending towards the outer side is fixed on the lifting plate, the first carrier clamping jaw comprises a mounting plate, four clamping hands, a transmission assembly and a first clamping driving cylinder, the mounting plate is fixed on one side of the lifting plate and is positioned below the cantilever, the four corners of the mounting plate are provided with strip-shaped through holes extending along the two outer side wall directions of the outer groove, the bottom ends of the four clamping hands penetrate through the through holes, and the top ends of the four clamping hands are connected with the first clamping driving cylinder through the transmission assembly, the first clamping driving cylinder is vertically installed at the end part of the cantilever and the driving rod is arranged downwards, and the first clamping driving cylinder drives the bottom ends of the four clamping hands to enter the outer groove through the transmission assembly to clamp the product carrier.

As a further improvement of this scheme, transmission assembly includes two drive plates, first connecting block, second connecting block and guiding component, and the top that is located two tong of homonymy is connected with first connecting block, be provided with the articulated shaft on the first connecting block, just first connecting block with be provided with guiding component between the mounting panel, the one end of two drive plates articulates in the first connecting block that corresponds, and the other end is coaxial to articulate on the second connecting block, the actuating lever that first centre gripping drove actuating cylinder connect in on the second connecting block.

As a further improvement of this scheme, a plurality of lock screw station, compress tightly unblock station and detection station and be located the homonymy of carrier circulation transfer chain, the both ends of carrier circulation transfer chain are provided with respectively and are used for carrying the second sideslip mechanism of lock screw station and being used for carrying the third sideslip mechanism of unloading station with the product carrier from the detection station with the product carrier, a plurality of lock screw mechanism is located the outside of carrier circulation transfer chain, all includes lock screw robot, screw automatic feed mechanism and lock screw electricity and criticize, lock screw robot drives the action of locking screw electricity wholesale, screw automatic feed mechanism is automatic to be carried the screw to locking screw electricity and criticizes.

As a further improvement of this scheme, compress tightly release mechanism set up in the inboard of carrier circulation transfer chain, it includes the stand, the top of stand is fixed with the fixed plate, the outside of fixed plate is provided with first movable plate through linear guide ability lateral shifting, be provided with an at least second movable plate through linear guide ability ground of reciprocating on the first movable plate, the bottom of second movable plate is fixed with the unblock hook plate that extends down, first movable plate and second movable plate all are connected with and drive actuating cylinder, drive actuating cylinder drive first movable plate and second movable plate along from top to bottom and horizontal cooperation action, and then drive unblock hook plate and hook the clamp plate and drive the clamp plate upset upwards and carry out the unblock.

As a further improvement of the scheme, the blanking robot adopts a four-axis robot, the blanking clamping jaws comprise a mounting plate, the driving end of the four-axis robot is connected on the mounting plate, the four corners of the mounting plate are all provided with elongated outer through holes, outer clamping jaws are arranged in the outer through holes in a penetrating manner, the top ends of the two outer clamping jaws positioned at the same side are all connected on a first movable seat, the first movable seat is mounted on the mounting plate through a linear guide rail, two driving cylinders drive two first movable seats to be close to and further drive the bottom ends of the four outer clamping jaws to extend into outer grooves of a product carrier to clamp the product carrier, four elongated inner through holes are arranged on the mounting plate at the inner side of an area surrounded by the four outer clamping jaws, inner clamping jaws are arranged in the inner through holes in a penetrating manner, and the top ends of the two inner clamping jaws positioned at the same side are all connected on a second movable seat, the second sliding seat is installed on the installation plate through a linear guide rail, and two driving cylinders drive the two second sliding seats to be close to and then drive the bottom ends of the four inner clamping jaws to stretch into the inner grooves of the product carriers to clamp products.

As a further improvement of the scheme, a plurality of CCD vision positioning devices for positioning the product carriers during the conveying process are mounted above the carrier circulating conveying line on the frame.

Compared with the prior art, the automatic screw locking device of the electronic sphygmomanometer has the following advantages:

1) the structure is compact and the design is ingenious;

2) the automatic screw locking device has the advantages that the automatic screw locking of internal devices of the electronic sphygmomanometer can be realized, the automation degree is high, the working efficiency is greatly improved, the labor is saved, and the assembly cost is reduced;

3) the detection device with the visual positioning and the missing locking screws can ensure the assembly quality of products.

Drawings

FIG. 1 is a schematic perspective view of an automatic screw locking device of an electronic sphygmomanometer according to an embodiment of the present invention;

FIG. 2 is a top view of an automatic screw locking device of an electronic blood pressure monitor according to an embodiment of the present invention;

FIG. 3 is a schematic perspective view of a feeding mechanism of an automatic screw locking device of an electronic sphygmomanometer according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a carrier circulation conveyor line of the automatic screw locking device of the electronic sphygmomanometer according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a product carrier of an automatic screw locking device of an electronic sphygmomanometer according to an embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 4 at A;

FIG. 7 is a schematic perspective view of a blanking mechanism of the automatic screw locking device of the electronic sphygmomanometer according to the embodiment of the present invention;

fig. 8 is a partial enlarged view at B in fig. 7.

Detailed Description

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 8, in the present embodiment, an automatic screw locking device for an electronic sphygmomanometer includes a frame 1, a feeding mechanism 2, a product carrier 3, a carrier circulation conveying line 4, a plurality of screw locking mechanisms 5, a discharging mechanism 6, and an empty carrier return line 7, which are disposed on the frame 1, the product carrier 3 includes a carrier body 30, two outer grooves 31 are correspondingly disposed on two opposite outer sidewalls of the carrier body 30, a cavity 32 for positioning a product is disposed in the middle of the carrier body 30, two inner grooves 33 are correspondingly disposed on two opposite inner sidewalls of the cavity 32, a pressing mechanism for pressing and fixing the product is disposed on the carrier body 30, the pressing mechanism includes a pressing plate 34 and an overturning limiting seat 35, the overturning limiting seat 35 is fixed on the carrier body 30, the pressing plate 34 is hinged to the overturning limiting seat 35 through a hinge shaft and can be selectively located in a horizontal state and a vertical state, the product on the carrier body 30 is fixed when the pressing plate 34 is in the horizontal state, and the product on the carrier body 30 is released when the pressing plate 34 is in the vertical state.

The feeding mechanism 2 comprises a feeding conveyor line 20, a first lifting mechanism and a carrier transplanting mechanism 21, the first lifting mechanism can be arranged at the discharge end of the feeding conveyor line 20 in a lifting manner and comprises a lifting platform 22 and a first lifting driving module 23, the carrier transplanting mechanism 21 comprises a transplanting frame 210, a transverse moving driving module 211 is fixed on the transplanting frame 210, a transverse moving connecting plate 212 is assembled on the transverse moving driving module 211 in a transverse moving manner, a lifting plate 213 is arranged on the transverse moving connecting plate 212 in a lifting manner, the lifting plate 213 is connected with a lifting driving cylinder 214, a cantilever 214 extending outwards is fixed on the lifting plate 213, a first clamping driving cylinder 215 is vertically arranged at the outer end part of the cantilever 214, a driving rod of the first clamping driving cylinder 215 is arranged downwards and is connected with a feeding carrier clamping jaw comprising a first mounting plate 216, the first mounting plate 216 is fixed at one side of the lifting plate 213 and is positioned below the cantilever 214, the through-hole of the rectangular shape that two lateral wall directions of seting up outer recess 31 extend is all seted up in the four corners of first mounting panel 216, the through-hole setting is passed to four material loading tong 217's bottom, the top is connected first centre gripping through transmission assembly and is driven actuating cylinder 215, transmission assembly includes two drive plates 218, first connecting block 219, second connecting block 220 and linear guide, the top that is located two material loading tong 217 of homonymy is connected with first connecting block 219, be provided with the articulated shaft on first connecting block 219, and be provided with linear guide between first connecting block 219 and the first mounting panel 216, the one end of two drive plates 218 articulates on corresponding first connecting block 219, the other end coaxial articulation is on second connecting block 220, the actuating lever that first centre gripping drove actuating cylinder 215 is connected on second connecting block 220.

Carrier circulation transfer chain 4 adopts an annular structure, which comprises a conveying device driven by a servo motor and a synchronous belt, a feeding station 4a, a plurality of screw locking stations 4b, a pressing unlocking station 4c, a detection station 4d and a blanking station 4e are respectively arranged on carrier circulation transfer chain 4, feeding station 4a and blanking station 4e are arranged at two ends of one side of carrier circulation transfer chain 4, a plurality of screw locking stations 4b, pressing unlocking station 4c and detection station 4d are arranged at the other side of carrier circulation transfer chain 4, a positioning mechanism 40 for positioning product carrier 3 when locking screws is arranged at one side of each screw locking station 4b on frame 1, positioning mechanism 40 is composed of a driving cylinder and a positioning plate, a second transverse moving mechanism 41 for conveying product carrier 3 from feeding station 4a to screw locking station 4b and a second transverse moving mechanism 41 for conveying product carrier from detection station 4d are respectively arranged at two ends of carrier circulation transfer chain 4 Carry the third sideslip mechanism 42 of unloading station 4e, every lock screw station 4b goes up the supporting lock screw mechanism 5 that is located the carrier circulation transfer chain 4 outside, and lock screw mechanism 5 includes lock screw robot 43, screw automatic feed mechanism and lock screw screwdriver, and lock screw robot 43 drives the action of locking screw screwdriver, and screw automatic feed mechanism carries the screw to locking screw screwdriver automatically. The pressing and unlocking mechanism 44 is arranged in the carrier circulating conveying line 4 corresponding to the pressing and unlocking station, the pressing and unlocking mechanism 44 comprises an upright column 440, a fixed plate 441 is fixed at the top of the upright column 440, a first movable plate 442 is transversely movably arranged on the outer side of the fixed plate 441 through a linear guide rail, two second movable plates 443 are arranged on the first movable plate 442 through the linear guide rail at intervals in a vertically movable mode, an unlocking hook plate 444 extending downwards is fixed at the bottom of the second movable plate 443, the first movable plate 442 and the second movable plate 443 are both connected with driving cylinders, the driving cylinders drive the first movable plate 442 and the second movable plate 443 to move in a vertical and horizontal matching mode, and then the unlocking hook plate 444 is driven to hook the pressing plate 34 and drive the pressing plate 34 to upwards turn over for unlocking. A plurality of CCD visual positioning devices 8 used for positioning the product carriers 3 in the conveying process are arranged above the carrier circulating conveying line 4 on the frame 1. And a detection device 9 for detecting whether the product is locked by the screw is arranged on the detection station 4 d.

The blanking mechanism 6 is arranged at a blanking station and comprises a blanking robot 60 and a blanking clamping jaw 61 used for placing a product and a product carrier on an empty carrier return line 7 and a discharge port respectively, the blanking clamping jaw 61 is arranged at the driving end of the blanking robot 60, the blanking robot 60 adopts a four-axis robot, the blanking clamping jaw 61 comprises a second mounting plate 610, the driving end of the four-axis robot is connected to the second mounting plate 610, the four corners of the second mounting plate 610 are provided with strip-shaped outer through holes, outer clamping jaws 611 penetrate through the outer through holes, the top ends of the two outer clamping jaws 611 positioned on the same side are connected to a first movable seat 612, the first movable seat 612 is arranged on the second mounting plate 610 through a linear guide rail, two driving cylinders drive the two first movable seats 610 to be close to drive the bottom ends of the four outer clamping jaws 611 to extend into outer grooves 31 of the product carrier 3 to clamp the product carrier 3, and four inner through holes of a long strip shape are arranged on the inner side of the area surrounded by the four outer clamping jaws 611 on the second mounting plate 610, the inner clamping jaws 613 are arranged in the inner through holes in a penetrating manner, the top ends of the two inner clamping jaws 613 positioned on the same side are connected to the second movable seat 614, the second movable seat 614 is mounted on the second mounting plate 610 through a linear guide rail, and two driving cylinders drive the two second movable seats 614 to be close to and further drive the bottom ends of the four inner clamping jaws 613 to extend into the inner grooves 33 of the product carrier 3 to clamp a product.

During operation, a product is manually pressed and fixed on a product carrier 3, then the product carrier is placed on the feeding conveying line 20, the lifting platform 22 conveys the product carrier 3 to a material taking position, the first clamping driving cylinder 215 drives the four feeding clamping hands 217 to grab the product carrier 3 and then transplant the product carrier 3 to the feeding station 4a, the product carrier 3 is conveyed from the feeding station to the screw locking station 4b through the second transverse mechanism 41, the conveying device automatically conveys the product carrier 3 from the feeding station 4a to pass through the screw locking stations 4b in sequence, internal devices are fixed in the shell through the screw locking mechanism distribution on each station, the product carrier 3 is positioned on each station through the CCD visual positioning device 8 and the positioning mechanism 40, when the product carrier 3 is conveyed to the pressing and unlocking station 4c, the unlocking and pressing mechanism 44 automatically releases the pressing plate 34 to fix the product, after being detected by the detection device 9, the product carrier 3 is moved to the blanking station 4e through the third traversing mechanism 42, the blanking mechanism 6 grabs the product carrier 3 through the blanking clamping jaws 61, and then the product carrier 3 is placed on the empty carrier reflow line 7 through the step-by-step opening of the outer clamping jaws 611 and the inner clamping jaws 613, and the product on the carrier is placed on the discharge port.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but is capable of various modifications and changes without departing from the spirit and scope of the utility model, which are intended to be within the scope of the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. An automatic screw locking device of an electronic sphygmomanometer, which is characterized by comprising a rack, a feeding mechanism, a product carrier, a carrier circulating conveying line, a plurality of screw locking mechanisms, a discharging mechanism and a no-load tool return line, wherein the feeding mechanism, the product carrier, the carrier circulating conveying line, the plurality of screw locking mechanisms, the discharging mechanism and the no-load tool return line are arranged on the rack,

the blanking mechanism is arranged at the blanking station and comprises a blanking robot and a blanking clamping jaw, wherein the blanking clamping jaw is used for placing a product and a product carrier in a no-load tool return line and a discharge hole respectively, and the blanking clamping jaw is arranged at the driving end of the blanking robot.

2. The automatic screw locking device of the electronic sphygmomanometer according to claim 1, wherein a detection station is arranged on the carrier circulating conveying line between the pressing and unlocking station and the blanking station, and a detection device for detecting whether a product is screw-locked or not is arranged on the detection station.

3. The automatic screw locking device of an electronic sphygmomanometer according to claim 1, wherein the product carrier includes a carrier body, two outer grooves are correspondingly formed on two opposite outer side walls of the carrier body, a cavity for positioning a product is formed in a middle portion of the carrier body, and two inner grooves are correspondingly formed on two opposite inner side walls of the cavity.

4. The automatic screw locking device of electronic sphygmomanometer according to claim 3, wherein the pressing mechanism comprises a pressing plate and a turn-over limiting seat, the turn-over limiting seat is fixed on the carrier body, the pressing plate is hinged to the turn-over limiting seat through a hinge shaft and can be selectively in a horizontal state and a vertical state, the pressing plate fixes the product on the product carrier in the horizontal state, and the pressing plate releases the fixation of the product on the product carrier in the vertical state.

5. The automatic screw locking device for electronic sphygmomanometer according to claim 3, wherein the first traverse mechanism comprises a transplanting frame, a traverse driving module is fixed on the transplanting frame, a traverse connecting plate is mounted on the traverse driving module in a laterally movable manner, the second lifting mechanism comprises a lifting plate which is mounted on the traverse connecting plate in a lifting manner, the lifting plate is connected with a lifting driving cylinder, a cantilever extending outwards is fixed on the lifting plate, the first carrier clamping jaw comprises a mounting plate, four clamping hands, a transmission assembly and a first clamping driving cylinder, the mounting plate is fixed on one side of the lifting plate and located below the cantilever, and four corners of the mounting plate are provided with elongated through holes extending along two outer side wall directions of the outer groove, and bottom ends of the four clamping hands are disposed through the through holes, the top is connected first centre gripping through drive assembly and is driven actuating cylinder, first centre gripping drive actuating cylinder vertical install in the tip and the actuating lever of cantilever set up down, first centre gripping drives actuating cylinder and gets into through the bottom of four tong of drive assembly drive the clamp of realization to the product carrier in the outer recess gets.

6. The automatic screw locking device of the electronic sphygmomanometer according to claim 5, wherein the transmission assembly comprises two driving plates, a first connecting block, a second connecting block and a guiding component, the first connecting block is connected to the top ends of the two clamping hands located on the same side, a hinge shaft is arranged on the first connecting block, the guiding component is arranged between the first connecting block and the mounting plate, one end of each of the two driving plates is hinged to the corresponding first connecting block, the other end of each of the two driving plates is coaxially hinged to the second connecting block, and the driving rod of the first clamping driving cylinder is connected to the second connecting block.

7. The automatic screw locking device for the electronic sphygmomanometer according to claim 1, wherein the plurality of screw locking stations, the pressing and unlocking stations and the detection station are located on the same side of the carrier circulation conveying line, a second traversing mechanism for conveying a product carrier from a loading station to the screw locking stations and a third traversing mechanism for conveying the product carrier from the detection station to a unloading station are respectively arranged at two ends of the carrier circulation conveying line, the plurality of screw locking mechanisms are located on the outer side of the carrier circulation conveying line and each comprise a screw locking robot, an automatic screw feeding mechanism and a screw locking electric screwdriver, the screw locking robot drives the screw locking electric screwdriver to move, and the automatic screw feeding mechanism automatically conveys screws to the screw locking electric screwdriver.

8. The automatic screw locking device for the electronic sphygmomanometer according to claim 1, wherein the pressing and unlocking mechanism is disposed inside the carrier circulation conveying line and includes a vertical column, a fixed plate is fixed to a top of the vertical column, a first movable plate is laterally movably disposed on an outer side of the fixed plate through a linear guide, at least one second movable plate is vertically movably disposed on the first movable plate through a linear guide, a downwardly extending unlocking hook plate is fixed to a bottom of the second movable plate, the first movable plate and the second movable plate are both connected with a driving cylinder, and the driving cylinder drives the first movable plate and the second movable plate to cooperate vertically and laterally to further drive the unlocking hook plate to hook the pressing plate and drive the pressing plate to turn upwards for unlocking.

9. The automatic screw locking device of an electronic sphygmomanometer according to claim 3, wherein the unloading robot is a four-axis robot, the unloading jaw includes a mounting plate, the driving end of the four-axis robot is connected to the mounting plate, the four corners of the mounting plate are provided with elongated outer through holes, outer jaws are respectively inserted into the outer through holes, the top ends of two outer jaws located on the same side are respectively connected to a first movable seat, the first movable seat is mounted on the mounting plate through a linear guide rail, two driving cylinders drive the two first movable seats to approach and further drive the bottom ends of the four outer jaws to extend into outer grooves of product carriers to clamp the product carriers, the mounting plate is provided with four elongated inner through holes inside the areas surrounded by the four outer jaws, and inner jaws are respectively inserted into the inner through holes, the top that is located two interior clamping jaws of homonymy all connects on the second sliding seat, the second sliding seat passes through linear guide and installs on the mounting panel, and two drive actuating cylinder drive two second sliding seats are close to and then drive the inner groovy that the bottom of four interior clamping jaws stretched into the product carrier and carry out the centre gripping to the product.

10. The automatic screw locking device of an electronic sphygmomanometer according to claim 1, wherein a plurality of CCD visual positioning devices for positioning the product carriers during the transportation process are mounted on the frame above the carrier circulation transportation line.