CN117388099B - Drug resistance testing device of syringe piston head - Google Patents
Drug resistance testing device of syringe piston head Download PDFInfo
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- CN117388099B CN117388099B CN202311686352.2A CN202311686352A CN117388099B CN 117388099 B CN117388099 B CN 117388099B CN 202311686352 A CN202311686352 A CN 202311686352A CN 117388099 B CN117388099 B CN 117388099B
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- 238000012360 testing method Methods 0.000 title claims abstract description 69
- 206010059866 Drug resistance Diseases 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 82
- 230000000694 effects Effects 0.000 claims abstract description 3
- 230000033001 locomotion Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 235000012431 wafers Nutrition 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 238000002791 soaking Methods 0.000 abstract description 11
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000003814 drug Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 238000013459 approach Methods 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to the technical field of syringe spare and accessory part detection, in particular to a drug resistance testing device for a syringe piston head, which solves the defects existing in the prior art and comprises a test bed, an axial rebound mechanism, a longitudinal rebound mechanism, a linkage mechanism and a driving mechanism, wherein a soaking groove is arranged on the test bed, a control terminal with a PLC (programmable logic controller) is arranged on the side wall of the soaking groove, a circular groove is formed in the test bed, a plurality of electric push rods are arranged in the groove, the piston head is controlled to be positioned at the middle position of the groove by simultaneously starting the electric push rods, limiting mechanisms are arranged on two sides of the groove, a fixing frame is further arranged on the test bed, the axial rebound mechanism is arranged along the length direction of the test bed, and comprises clamping strips, a sliding seat I and a piston part, and the clamping strips are symmetrically arranged on two sides of the groove. Compared with the prior art, the invention can effectively test the chemical resistance of the piston head of the injector and ensure the test effect.
Description
Technical Field
The invention relates to the technical field of detection of parts of an injector, in particular to a drug resistance testing device of a piston head of the injector.
Background
The syringe commonly used in medical treatment basically consists of an outer cylinder, a piston and a core rod, wherein the piston is arranged on the end part of the core rod, and the core rod is arranged between the inner walls of the outer cylinder. In the use process of the injector, different liquid medicines need to be extracted, the liquid medicines directly contact the piston after being extracted into the outer cylinder, so that the drug resistance degree of the piston is one of the evaluation capability of the injector, the drug resistance degree test of the piston generally comprises the steps of soaking the piston in the drug for a certain time, observing whether the surface of the piston is expanded, discolored and the like, reacting the drug resistance through the expansion degree change of the piston, and the rebound degree or deformation degree of the piston can be measured by pressing the piston to judge the expansion degree of the piston.
The Chinese patent with publication number of CN115855712B discloses a rubber rebound resilience measuring instrument, and the technical scheme of the patent is mainly that laser emitted by a laser emitter on a impacting ball is captured by a movable photosensitive array plate, so that the highest point of the impacting ball when being sprung for the first time can be clearly detected, and the number of the bouncing times and the bouncing frequency are recorded through the photosensitive array plate, thereby being more convenient for analyzing the rebound resilience of rubber. However, the following problems still exist in the technical scheme:
The impact ball is only subjected to a force applied to the impact ball in a single direction of the rubber, and when the rubber or the piston head of the injector is compressed, the force applied to the impact ball in the outward direction is not only in a single direction in the recovery process, so that the test result of the technical scheme of the patent is limited greatly.
Therefore, it is necessary to provide a drug resistance testing device for a syringe piston head to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a drug resistance testing device of a piston head of a syringe, which aims to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a syringe piston head's drug resistance testing arrangement, includes test bench, axial rebound mechanism, vertical rebound mechanism, link gear and actuating mechanism, be provided with the soaking tank on the test bench, and install the control terminal who takes the PLC controller on its lateral wall, offered circular recess on the test bench, be provided with a plurality of electric putter in the recess, control the piston head and be located the intermediate position department of recess through starting electric putter simultaneously, and both sides at the recess are provided with stop gear, and still install the mount on the test bench;
The axial rebound mechanism is arranged along the length direction of the test bed, the axial rebound mechanism comprises clamping strips, a first sliding seat and a piston piece, the clamping strips are provided with two clamping strips and symmetrically move on two sides of the groove, one side of each clamping strip is provided with an installation seat on the test bed, the piston piece is arranged on the installation seat in a penetrating mode, a first spring is sleeved outside the piston piece, a first pressure-sensitive sensor capable of being in contact with the first spring is embedded on the side wall of one side of the installation seat, and the first sliding seat is arranged on one side below the clamping strips in the test bed in a sliding mode along the linear direction;
the axial rebound mechanism further comprises a moving seat and a guide seat, an inner cavity is formed in one side of the inside of the test bed, a guide rod I arranged along the length direction of the test bed is arranged between the inner walls of two sides of the inner cavity, a slide seat I slides on the guide rod I, a bulge of a cylindrical structure is welded on the slide seat I, the guide seat is arranged on the top wall of the inner cavity through a screw and is positioned right below the central position of the groove, the side walls of the two sides of the guide seat are all inclined surfaces, a shaft sleeve is welded on one side wall of the mounting seat, a piston part also penetrates through the shaft sleeve, and the piston part consists of a shaft rod and wafers welded on two ends of the shaft rod;
The test bed is provided with a through hole II, the moving seat slides on the upper surface of the test bed, a cavity is formed in the moving seat, a piston pin moving along the vertical direction is elastically arranged in the cavity, a top piece is welded on the bottom end of the piston pin, one side of the bottom end of the top piece is also provided with an inclined surface, the top piece penetrates and slides between the inner walls of the through hole II, the inclined surface of the top piece is matched with the inclined surface of the guide seat, and the highest point of the protrusion is positioned below the bottom surface of the guide seat;
the longitudinal rebound mechanism comprises a sliding seat III, a sliding cylinder and a pressing sheet, wherein the sliding seat III is arranged in a sliding manner along the horizontal direction of the fixing frame, the pressing sheet is arranged at the bottom of the sliding cylinder, a guide shaft is arranged in the middle of the fixing frame in a penetrating manner, the sliding cylinder and the pressing sheet move in the position right above the groove along the vertical direction, a spring III is arranged above the sliding cylinder outside the guide shaft, and a pressure-sensitive sensor II which can be contacted with the spring III is embedded on the fixing frame above the spring III;
the linkage mechanism comprises a second slide seat, a lifting seat, a movable seat and a fixed seat, wherein two fixed shafts are welded between the fixed frame and the test bed, the lifting seat and the movable seat both slide on the fixed shafts, the fixed seat is arranged on the fixed frame and is positioned right above the connecting seat, the second slide seat is provided with two and is oppositely arranged, the second slide seat moves in the test bed along the linear direction, the second slide seat is connected with the first slide seat and drives the axial rebound mechanism, a connecting component is arranged between the movable seat and the longitudinal rebound mechanism, and the length of the connecting component can be changed according to test requirements;
The bottom end of the sliding seat III and the side wall of one side of the sliding seat III are respectively provided with a connecting seat III and a connecting seat II through screws, the top end of the sliding cylinder is provided with two connecting grooves, a connecting arm II is arranged between the connecting seat III and the connecting grooves through shaft connection, and the connecting seat II is connected with one end of the connecting component;
the driving mechanism is arranged along the vertical direction of the fixing frame, the driving mechanism is connected with the lifting seat in an inserting mode, the driving mechanism comprises a driving seat and a moving strip, the driving seat is arranged in a convex structure and slides on the fixing frame along the vertical direction, screw rods which are arranged vertically are arranged on the side walls of the two sides of the fixing frame, one end of each screw rod is connected with a rotating motor, and each screw rod penetrates through the driving seat and is in threaded transmission fit with the driving seat;
side holes are formed in the side walls of the two sides of the driving seat, a second guide rod arranged along the length direction of the second guide rod is arranged in the side holes, a second spring is sleeved on the second guide rod, a moving strip penetrates through the driving seat in the horizontal direction, a sliding bolt is welded on one side wall of the moving strip, the sliding bolt slides on the second guide rod and moves between the inner walls of the side holes, one end of the second spring is abutted against the sliding bolt, and the other end of the second spring is welded on the inner wall of the side hole;
Two fixing pieces of L-shaped structures which are symmetrically arranged are welded on the side walls of the two sides of the fixing frame, a through hole III which is arranged in a penetrating manner is formed in the driving seat right below the fixing pieces, the through hole III is matched with the fixing pieces, one side of the bottom end of each fixing piece is provided with an inclined surface, a guide hole is formed in each moving strip, the side wall of one side of each guide hole is also provided with an inclined surface, and the inclined surface of each fixing piece is matched with the inclined surface in each moving strip;
when the driving seat moves upwards along the vertical direction, one end of the moving bar is inserted into the side arm, the lifting seat moves upwards synchronously along with the driving seat, the movable seat and the lifting seat are connected into a whole, in the ascending movement process, the angle between the two connecting arms on the same side is gradually reduced, two sliding seats on the same guide rod III are close to each other, the first sliding seat moves synchronously along with the second sliding seat, the clamping bar also moves linearly along with the clamping bar to one side of the groove, the connecting assembly synchronously drives the middle position of the three-way fixing frame of the sliding seat to move along with the movable seat with fixed length, and then the sliding seat drives the sliding cylinder downwards through the connecting arms, so that the piston head is simultaneously subjected to multi-directional acting force;
when the driving seat moves to be in contact with the fixing member, the fixing member pushes the moving strip away from one side of the side arm, so that the driving seat is separated from the lifting seat, meanwhile, the movable seat is connected with the fixed seat into a whole and separated from the lifting seat, the connecting assembly is in a state of freely adjusting the length and is in a horizontal state, meanwhile, the top member moves upwards along the inclined plane of the guide seat so as to be separated from the bulge, then the clamping strip moves towards one side away from the groove under the reaction force exerted by the piston head and gradually exerts the acting force on the spring I, meanwhile, the pressing piece also moves towards the upper side away from the groove under the reaction force exerted by the piston head and exerts the acting force on the spring III through the sliding cylinder, one end of the movable shaft is slidably adjusted between the inner walls of the fixed cylinder along with the sliding seat III, the lifting seat is located on the plane of the clamping seat, and the pressure-sensitive sensor I and the pressure-sensitive sensor II start to change in numerical value due to the force.
In one embodiment, two clamping seats which are symmetrically installed are elastically arranged on the fixed shaft, the lower surface of each clamping seat is an inclined surface, the upper surface of each clamping seat is a plane, side arms are welded on the side walls of the two sides of the lifting seat, a strip hole which is matched with the movable strip is formed in the side arms, and a connecting shaft is welded on the side wall of the other side of the lifting seat;
the movable seat can be connected with the lifting seat and the fixed seat into a whole through magnetic force respectively, an integrated connecting seat IV is arranged on the side wall of the movable seat, the connecting assembly comprises a fixed cylinder, a movable shaft and an electromagnetic ring, connecting pieces are arranged at one end of the fixed cylinder and the movable shaft respectively, the two connecting pieces are respectively arranged between the side wall of the connecting seat IV and the side wall of the connecting seat II through shaft connection, the electromagnetic ring is further arranged at one end of the fixed cylinder, the movable shaft penetrates through the electromagnetic ring and one end of the movable shaft always slides between the inner walls of the fixed cylinder, and the movable shaft and the electromagnetic ring can be fixed into a whole through magnetic force adsorption;
two guide rods III which are horizontally and symmetrically arranged are further arranged between the side walls of the inner cavity, a slide seat II is arranged on the guide rods III in a sliding mode, a connecting seat I is arranged on the slide seat II through a screw, a connecting arm I is arranged between the side walls of the connecting seat I through shaft connection, the other end of the connecting arm I is rotatably arranged on a connecting shaft which is located on the same side with the connecting arm I, and a connecting rod is arranged between the slide seat II and the slide seat I through insertion.
In one embodiment, the stop gear includes the fixed strip, press handle one and press handle two, the fixed strip is provided with two and passes through the screw fixation respectively in the both sides of recess, set up the through-hole four that set up along vertical direction on the fixed strip, press handle one's one end slip setting is between the inner wall of through-hole four, and press handle one and fixed through holding screw connection between the fixed strip, press handle one to slide and be provided with the gleitbretter, press handle two welding on the diapire of gleitbretter, and press handle two to be circular-arc structure setting, also pass through holding screw connection between gleitbretter and the pressure handle one and fix.
Compared with the prior art, the invention has the following beneficial effects:
1. the axial rebound mechanism and the longitudinal rebound mechanism are arranged, the piston head is extruded in the horizontal direction in a bidirectional manner, the piston head is extruded in the vertical direction in a unidirectional manner, so that the piston head can be simultaneously subjected to extrusion forces from three different directions to generate deformation, when the extrusion forces disappear, the rebound force generated by the deformation acts on the axial rebound mechanism and the longitudinal rebound mechanism to rebound along the original directions, finally the compression forces of the spring I and the spring III act on the pressure sensor I and the pressure sensor II respectively to change the numerical values, the maximum value of the pressure sensor I and the pressure sensor II when the numerical value of the pressure sensor II is increased is recorded by the PLC, and the maximum values of a plurality of tests are compared, so that the rebound degree of the piston head soaked with liquid medicine is compared to indirectly reflect the drug resistance of the piston head.
2. Through setting up the link gear, one end is connected with axial rebound mechanism, and the other end is connected with vertical rebound mechanism to make through the drive of link gear, can control axial rebound mechanism and vertical rebound mechanism's drive process simultaneously, and after exerting pressure to certain degree to the piston head, accomplish the drive separation with axial rebound mechanism and vertical rebound mechanism, make two mechanisms can accomplish corresponding rebound process respectively, and can not influence each other.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic top view of the structure of FIG. 1;
FIG. 3 is a schematic front view of the axial rebound mechanism of the present invention;
FIG. 4 is a schematic illustration of the attachment of the mount, linkage and longitudinal resilient mechanism of the present invention;
FIG. 5 is a schematic diagram showing the connection of the driving mechanism and the fixing frame;
FIG. 6 is a schematic view of the motion state of the fixing member and the moving bar according to the present invention;
fig. 7 is a schematic structural view of the limiting mechanism of the present invention.
In the figure: 1. a test bed; 11. a control terminal; 12. a soaking tank; 121. a draining frame; 13. a first through hole; 14. a groove; 141. an electric push rod; 15. a second through hole; 16. a fixing piece; 17. an inner cavity; 2. an axial rebound mechanism; 21. clamping strips; 22. moving the seat; 221. a piston pin; 222. a top piece; 23. a guide seat; 24. a first sliding seat; 241. a protrusion; 25. a mounting base; 251. a shaft sleeve; 252. a first pressure-sensitive sensor; 26. a piston member; 27. a first spring; 28. a first guide rod; 3. a fixing frame; 31. a screw; 32. a fixing member; 33. a second pressure-sensitive sensor; 4. a driving mechanism; 41. a driving seat; 411. a third through hole; 412. a second guide rod; 42. moving the bar; 421. a slide bolt; 422. a guide hole; 43. a second spring; 5. a linkage mechanism; 51. a second slide seat; 511. a connecting rod; 512. a guide rod III; 513. a first connecting arm; 514. a first connecting seat; 52. a fixed shaft; 521. a clamping seat; 53. a lifting seat; 531. a side arm; 54. a movable seat; 55. a fixing seat; 56. a connection assembly; 561. a fixed cylinder; 562. a movable shaft; 563. an electromagnetic ring; 6. a longitudinal rebound mechanism; 61. a sliding seat III; 611. a second connecting seat; 612. a third connecting seat; 62. a slide cylinder; 621. tabletting; 63. a guide shaft; 64. a third spring; 65. a second connecting arm; 7. a fixing strip; 71. a through hole IV; 8. pressing a first handle; 81. a limiting piece; 9. pressing a second handle; 91. a sliding vane.
Detailed Description
The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
As shown in fig. 1-2, the invention provides the technical scheme that: the utility model provides a syringe piston head's drug resistance testing arrangement, including test bench 1, axial rebound mechanism 2, vertical rebound mechanism 6 and actuating mechanism 4, the one end of test bench 1 is the height form and has seted up soaking tank 12, one side of soaking tank 12 is installed the control terminal 11 of taking the PLC controller through the screw on the lateral wall of test bench 1, the draining frame 121 has been hung to the top of soaking tank 12, and it has the sealing plug to plug on the lateral wall of one side of soaking tank 12, set up circular recess 14 on test bench 1, install a plurality of electric putter 141 in the recess 14, electric putter 141's motor portion is built-in test bench 1, only push rod part exposes outside, contact sensor (not shown in the figure) has been inlayed on the tip of electric putter 141, connect through the electrical signal between contact sensor and the PLC controller, the piston head is placed in the intermediate position department of recess 14, through starting all electric putter 141 simultaneously, stop when all contact sensor on the electric putter 141 are all triggered, thereby limit the position of piston head in the intermediate position of recess 14.
The axial rebound mechanisms 2 are arranged on two sides of the groove 14, the axial rebound mechanisms 2 are arranged along the length direction of the test bed 1, the fixing frames 3 are welded above the groove 14 along the width direction of the test bed 1, rotating motors are arranged on two side walls of the fixing frames 3 through screws, screw rods 31 are arranged at output ends of the rotating motors, the screw rods 31 are arranged along the vertical direction, fixing sheets 16 are welded on two side walls of the test bed 1, and the bottom ends of the screw rods 31 are arranged on the fixing sheets 16 through bearing rotation.
The vertical lateral wall of mount 3 is provided with actuating mechanism 4 in a sliding way, actuating mechanism 4 is connected with link gear 5 and sets up to all weld two mounting 32 of "L" on the both sides lateral wall of mount 3, the bottom of mounting 32 is sharp setting, move mounting 32 through actuating mechanism 4, can realize the separation of actuating mechanism 4 and link gear 5, be provided with vertical resilient mechanism 6 in the top of recess 14, the one end and the axial resilient mechanism 2 of link gear 5 are connected, thereby drive axial resilient mechanism 2, the other end and the vertical resilient mechanism 6 of link gear 5 are connected, thereby drive vertical resilient mechanism 6, and can cooperate the rebound detection in the resilience process.
Specifically, by pouring a proper amount of liquid medicine into the soaking tank 12, soaking the piston head in the liquid medicine for a period of time, taking out the piston head and placing the piston head in the draining frame 121 for draining, placing the piston head in the groove 14, positioning the piston head in the middle of the groove 14 through the positioning pin, then driving the axial rebound mechanism 2 to press the piston head in the direction close to the groove 14 through the vertical upward movement of the driving mechanism 4, and simultaneously driving the longitudinal rebound mechanism 6 to press the piston head downwards, when the driving mechanism 4 is lifted to be in contact with the fixing piece 32, the longitudinal rebound mechanism 6 and the axial rebound mechanism 2 start rebounding, so that the medicine resistance degree of the piston head can be judged through measuring the rebound force.
As shown in fig. 1 and 7, a limiting mechanism is further arranged on two sides of the groove 14, the limiting mechanism is adjusted to a position contacting with the top of the piston head before testing, the limiting mechanism comprises two fixing strips 7, a first pressing handle 8 and a second pressing handle 9, the fixing strips 7 are respectively fixed on the test stand 1 through screws, the two fixing strips 7 are symmetrically arranged on two sides of the groove 14, a fourth through hole 71 arranged in the vertical direction is formed in the fixing strips 7, a first pressing handle 8 is slidably arranged between inner walls of the fourth through hole 71, two limiting pieces 81 are welded on outer walls of the first pressing handle 8, the two limiting pieces 81 are slidably arranged along side walls of two sides of the fixing strips 7 respectively, the first pressing handle 8 is fixedly connected with the fixing strips 7 through a set screw, a sliding sheet 91 is slidably arranged on the first pressing handle 8, the bottom end of the sliding sheet 91 is welded with the second pressing handle 9, and the sliding sheet 91 is fixedly connected with the first pressing handle 8 through the set screw.
Because one end of a piston head for a common injector is arranged on a push rod of the injector, and the other end of the piston head is in a structure similar to a pointed shape, a first pressing handle 8 and a second pressing handle 9 are arranged, after the piston head is positioned, the first pressing handle 8 is contacted with the top end of the piston head, and the second pressing handle 9 is contacted with an inclined plane at the top of the piston head, so that the piston head does not need to be pressed, and only needs to be contacted with the piston head, so that the piston head cannot directly fly out when rebounding.
Specifically, after the piston head is placed in the groove 14, the bottom of the piston head is fixed by the electric push rod 141, then the position of the first pressing handle 8 is manually adjusted until the piston head contacts with the top of the piston head, the first pressing handle 8 is fixed on the fixing strip 7 by a set screw, the sliding sheet 91 is slid until the second pressing handle 9 also moves until the piston head contacts with the top side of the piston head, the position of the sliding sheet 91 is fixed by the set screw, and then the electric push rod 141 is controlled to reset by the PLC controller, so that the influence of the electric push rod 141 on the rebound degree of the piston head during resetting is avoided.
As shown in fig. 1-3, the axial rebound mechanism 2 comprises a clip strip 21, a moving seat 22, a guide seat 23, a first slide seat 24, a piston member 26 and a first spring 27;
an inner cavity 17 is formed in one side of the inside of the test bed 1, a first guide rod 28 arranged along the length direction of the test bed 1 is arranged between the inner walls of the inner cavity 17, two first sliding seats 24 which are oppositely arranged are arranged on the first guide rod 28 in a sliding mode, and cylindrical protrusions 241 are welded on the first sliding seats 24.
The guide seat 23 is installed on the top wall of the inner cavity 17 through a screw under the center position of the groove 14, two side walls of the guide seat 23 are inclined surfaces, two symmetrically arranged installation seats 25 are installed on the test bed 1 through bolts, a shaft sleeve 251 is welded on the surfaces of the opposite side walls of the two installation seats 25, a first pressure-sensitive sensor 252 is embedded on the surface of the installation seat 25 outside the shaft sleeve 251, the first pressure-sensitive sensor 252 is connected with a PLC (programmable logic controller) through an electric signal, a piston piece 26 is arranged in the shaft sleeve 251 in a penetrating manner, the piston piece 26 is also arranged through the installation seat 25, the piston piece 26 consists of a shaft rod and wafers welded on two ends of the shaft rod, a first spring 27 is sleeved outside the shaft rod, one end of the first spring 27 is fixedly connected with one of the wafers on one side of the shaft rod, and the other end of the first spring 27 can exert acting force on the first pressure-sensitive sensor 252 when the first spring 27 is extruded, so that the rebound force in the axial direction is detected.
The test bench 1 is provided with a through hole II 15 arranged along the length direction of the test bench 1 between two mounting seats 25, two symmetrically arranged guide grooves are respectively arranged on two sides of the through hole II 15, a moving seat 22 is arranged on the guide grooves on two sides in a sliding mode, two guide blocks (not shown in the drawing) are welded on the bottom end of the moving seat 22, the two guide blocks are respectively arranged in a sliding mode along the inner walls of the guide grooves on two sides, a clamping strip 21 is fixed on one side wall of the moving seat 22 through screws, a cavity is arranged in the moving seat 22, a piston pin 221 is elastically arranged in the cavity, the top of the piston pin 221 is located outside the moving seat 22, a top piece 222 is welded on the bottom end of the piston pin 221, one side of the bottom end of the top piece 222 is also in an inclined surface, and the top piece 222 penetrates and slides between the inner walls of the through hole II 15.
Wherein, the inclined surface of the top piece 222 is matched with the inclined surface of the guide seat 23, the lowest position of the bottom end of the top piece 222 can be contacted with the protrusion 241, and the highest point of the protrusion 241 is located below the bottom surface of the guide seat 23.
Specifically, the first slider 24 moves linearly along the first guide rod 28, after the boss 241 contacts the top piece 222, the top piece 222 is driven to move together, and the top piece 222 is driven by the boss 241 to move synchronously by the moving seat 22, the clamping strip 21 and the top piece 222, wherein the moving direction is from one side close to the position of the mounting seat 25 to one side of the position of the guide seat 23, and the first spring 27 is in an uncompressed state, gradually contacts with the piston head along with the continuous movement of the clamping strip 21 and simultaneously extrudes two sides of the piston head after contacting.
When the top piece 222 contacts with the guide seat 23 and is pushed by the bulge 241, the top piece 222 moves upwards along the inclined plane of the guide seat 23, so that the bulge 241 is separated from the top piece 222, after the bulge 241 is separated from the top piece 222, the piston head starts to apply a reaction force outwards, namely, a rebound process is carried out, in the process, the piston head applies a force to the clamping strip 21, so that the clamping strip 21 drives the movable seat 22 to synchronously rebound along a straight line direction to one side far away from the piston head, and continuously moves to one side against a wafer when contacting with one end of the piston piece 26, when one end of the spring 27 contacts with the pressure-sensitive sensor 252, the pressure-sensitive sensor 27 starts to be pressed, the monitored numerical value on the pressure-sensitive sensor 252 is changed, the force of the clamping strip 21 and the movable seat 22 is continuously weakened along with the continuous compression of the spring 27, and a rebound phenomenon occurs after the pressure-sensitive sensor 252 transfers the numerical value change to the PLC controller in real time, and therefore the PLC controller records the maximum value change of the pressure-sensitive sensor 252 from the first time.
As shown in fig. 4, the longitudinal resilient mechanism 6 includes a third slider 61, a slide cylinder 62, a pressing piece 621, a guide shaft 63, and a third spring 64;
the fixed frame 3 is provided with two sliding seats III 61 which are oppositely arranged in a sliding manner, the middle of the fixed frame 3 is penetrated and welded with a guide shaft 63, a second pressure-sensitive sensor 33 is embedded outside the guide shaft 63 at the middle position of the lower surface of the fixed frame 3, the second pressure-sensitive sensor 33 is connected with a PLC controller through an electric signal, the outer wall of the guide shaft 63 is provided with a sliding cylinder 62 in a sliding manner, and the bottom end of the sliding cylinder 62 is provided with a circular pressing sheet 621 through a screw.
The bottom end of the third slide seat 61 and one side wall of the third slide seat are respectively provided with a third connecting seat 612 and a second connecting seat 611 through screws, the top end of the sliding cylinder 62 is provided with two symmetrically arranged connecting grooves, a second connecting arm 65 is arranged between the third connecting seat 612 and the connecting grooves through shaft connection, a third spring 64 is sleeved outside the guide shaft 63 above the sliding cylinder 62, and the top end of the third spring 64 can be in contact with the second pressure sensor 33.
In addition, two through holes matched with the first pressing handle 8 are formed at the edge of the pressing sheet 621, so that the up-and-down movement of the pressing sheet 621 is not limited by the first pressing handle 8.
Specifically, through the linear motion of the third slide seat 61, the second connecting arm 65 drives the slide cylinder 62 to slide downwards along the guide shaft 63, and in the sliding process, the third spring 64 falls on the slide cylinder 62 under the influence of gravity, so that the pressing piece 621 continuously moves downwards to be close to the piston head and continuously applies pressure to the piston head after contacting the piston head.
When the boss 241 is separated from the top piece 222, the piston head starts to apply a reaction force outwards, that is, enters a rebound process, in which the piston head applies a force upwards to push the pressing sheet 621 and the slide cylinder 62 upwards, so that the third spring 64 moves upwards synchronously until the third spring contacts with the second pressure sensor 33, and applies a force to the second pressure sensor 33, and as the third spring 64 is continuously compressed, the force of the slide cylinder 62 on the third spring 64 is continuously weakened, and a rebound phenomenon occurs after the third spring 64 is compressed to a certain extent, so that when the second pressure sensor 33 transmits a numerical change to the PLC controller in real time, the PLC controller records the maximum value of the second pressure sensor 33 in the process of increasing the numerical value from the first time.
As shown in fig. 1 and 5 to 6, the driving mechanism 4 includes a driving seat 41 and a moving bar 42;
the driving seat 41 is arranged in a convex structure, the driving seat 41 slides on the vertical side wall of the fixing frame 3, the screw 31 penetrates through the driving seat 41 and is matched with the driving seat in a threaded transmission manner, the lifting motion of the driving seat 41 is controlled through the threaded driving of the screw 31, two through holes III 411 penetrating are formed in the driving seat 41, the through holes III 411 are arranged vertically, and the through holes III 411 are matched with the fixing piece 32 and are located right below the fixing piece 32.
Side holes are formed in the side walls of the two sides of the driving seat 41, a second guide rod 412 is welded between the inner walls of the side holes, a second spring 43 is sleeved on the second guide rod 412, one end of the second spring 43 is welded to one end of the side hole, a sliding bolt 421 in contact with the second spring 43 is arranged at the other end of the second spring 43 in a sliding mode along the second guide rod 412, the sliding bolt 421 slides between the inner walls of the side holes, the sliding bolt 421 and the moving bar 42 are fixed through welding, and the moving bar 42 penetrates between the inner walls of the driving seat 41 in the horizontal direction.
The moving bar 42 is provided with a guide hole 422, the guide hole 422 is arranged along the vertical direction of the moving bar 42, and one side wall of the guide hole 422 is an inclined surface.
Specifically, the output direction of the rotating motor is controlled by the PLC controller, so that the screw 31 rotates along with the control, thereby controlling the movement of the driving seat 41, and synchronously driving the lifting seat 53 of the linkage mechanism 5 to move upwards by the moving bar 42; when the driving seat 41 moves upwards along the fixing frame 3, the fixing piece 32 passes through the third through hole 411 when passing through the fixing piece 32, so that the inclined plane of the fixing piece 32 contacts with the inclined plane of the guide hole 422, and the position of the fixing piece 32 keeps still along with the continuous upward movement of the driving seat 41, and the moving bar 42 is driven to move to the left side as shown in fig. 5 under the interaction of the two inclined planes, so that the lifting seat 53 is separated from the moving bar 42.
As shown in fig. 4, the linkage mechanism 5 includes a second slide seat 51, a fixed shaft 52, a lifting seat 53, a movable seat 54, a fixed seat 55, and a connecting assembly 56;
the fixed shaft 52 is welded between the fixed frame 3 and the test bench 1, and the fixed shaft 52 is symmetrically provided with two, the lifting seat 53 is slidably arranged on the fixed shaft 52, two clamping seats 521 which are symmetrically arranged are elastically arranged on the fixed shaft 52, the lower surface of the clamping seat 521 is an inclined surface, the upper surface of the clamping seat 521 is a plane, side arms 531 are welded on the side walls of the two sides of the lifting seat 53, a strip hole matched with the movable strip 42 is formed in the side arms 531, a fixing seat 55 is arranged at the joint of the fixed shaft 52 and the fixed frame 3, the fixing seat 55 is fixed on the fixed frame 3 through screws, an electromagnet (not shown in the figure) is embedded on the lower surface of the fixing seat 55, an external power source I is embedded on the side wall of the fixing seat 55, the electromagnet I is connected with the external power source I through a wire, the external power source I is connected with the PLC (not shown in the figure), an external power source II is embedded on the upper surface of the lifting seat 53 through an electric signal connection control, an external power II is embedded on the side wall of the lifting seat 53, a wire connection control is used between the electromagnet II and the external power source II is connected with the external power source through an electric signal connection control, an electric signal 54 is embedded between the external power source II and the PLC controller through an electric signal connection control, the electromagnet is in the movable seat 55 and the movable seat is connected with the movable seat 55 through the movable seat and the movable seat is in a movable seat is connected with the movable seat 53 through the movable seat.
Specifically, when the lifting seat 53 contacts with the movable seat 54, the PLC controller starts the external power supply on the lifting seat 53 to enable the electromagnet to enter a working mode, so that the movable seat 54 is firmly adsorbed on the lifting seat 53 and moves synchronously with the lifting seat 53, the movable seat 54 gradually approaches and contacts with the fixed seat 55 along with the continuous upward movement of the lifting seat 53, after the movable seat 54 contacts with the fixed seat 55, the PLC controller firstly controls the external power supply on the fixed seat 55 to start so as to enable the electromagnet to enter a working mode, thereby connecting the movable seat 54 with the fixed seat 55 through magnetic force, and then disconnects the external power supply on the lifting seat 53 through the PLC controller so as to enable the electromagnet to stop working, namely, the movable seat 54 is only connected and fixed with the fixed seat 55 at the moment, and in this state, the connecting assembly 56 is positioned in the horizontal direction, and the connecting arm 65 is positioned in the vertical direction.
The side wall of the movable seat 54 is provided with a fourth connecting seat which is connected with the movable seat 54 into a whole, the connecting component 56 is arranged between the fourth connecting seat and the second connecting seat 611, the connecting component 56 comprises a fixed cylinder 561, a movable shaft 562 and an electromagnetic ring 563, one end of the fixed cylinder 561 and one end of the movable shaft 562 are welded with connecting pieces, the two connecting pieces are respectively arranged between the fourth connecting seat and the side wall of the second connecting seat 611 through shaft connection, the other end of the movable shaft 562 always slides between the inner wall of the fixed cylinder 561, the electromagnetic ring 563 is fixedly arranged at one end of the fixed cylinder 561 through screws, an external power supply III is embedded on the outer wall of the fixed cylinder 561, the external power supply III is connected with the electromagnetic ring 563 through wires, the external power supply and a PLC controller are connected through electric signals, and the movable shaft 562 and the electromagnetic ring 563 can be adsorbed and fixed through magnetic force.
Specifically, during the upward movement of the lifting seat 53, the movable seat 54 and the lifting seat 53 are integrally connected, and the length of the connecting component 56 at this time remains unchanged, and along with the upward movement of the lifting seat 53, the connecting component 56 pushes the third slide seat 61 to move, so that the third slide seat 61 pushes the sliding cylinder 62 downward through the second connecting arm 65.
When the boss 241 is separated from the top piece 222, that is, when the movable seat 54 is integrally connected with the fixed seat 55, the piston head starts to apply a reaction force outwards, and at this time, when the PLC controller controls the external power supply to be started, the power-on state of the external power supply three is synchronously stopped, so that the movable shaft 562 can be slidably adjusted along the fixed cylinder 561, and along with the upward movement of the sliding cylinder 62, the sliding seat three 61 moves in the original direction, so that the movable shaft 562 is driven to move into the fixed cylinder 561.
Two guide rods III 512 are also arranged between the inner walls of the inner cavity 17, the two guide rods III 512 are symmetrically arranged, two sliding seats II 51 which are oppositely arranged are slidably arranged on the guide rods III 512, a connecting seat I514 is arranged on the sliding seats II 51 through screws, a connecting arm I513 is arranged between the side walls of the connecting seat I514 through shaft connection, two symmetrically arranged through holes I13 are formed in the test bed 1, the connecting arm I513 moves in the through holes I13, a connecting shaft is welded on the side wall of the other side of the lifting seat 53, the other ends of the two connecting arms I513 on the same side are rotatably arranged on the connecting shaft on the same side, two sliding seats II 51 on two sides are respectively connected and fixed into a whole with the sliding seat I24 through connecting rods 511, and two ends of the connecting rods 511 are respectively inserted into the sliding seats II 51 and the sliding seats I24.
The fixed shaft 52 is always located on a plane where central axes of the two sliding seats two 51 on the same side are located, that is, an isosceles triangle with the two connecting arms one 513 as isosceles is formed between the two sliding seats two 51 on the same guide rod three 512 and the connecting shaft.
Specifically, the lifting seat 53 drives the connecting shaft to synchronously lift and adjust, so that the connecting shaft always drives the two sliding seats 51 on two sides to move and adjust through the first connecting arms 513 on two sides in the moving process, so that the first connecting arms 513 on two sides always keep an isosceles shape along with the movement process of the lifting seat 53, and further the trend of relative movement of the two sliding seats 51 on the same side is controlled.
When the lifting seat 53 moves upwards, the clamping seat 521 is automatically pressed into the fixed shaft 52 to pass through, the angle between the two connecting arms 513 on the connecting shaft is gradually reduced, the two sliding seats 51 on the same guide rod III 512 are mutually close, the sliding seats 24 on the two sides are simultaneously driven to be mutually close, along with the movement of the sliding seat 24, when the boss 241 is separated from the top piece 222, the movable seat 54 is also driven to move to a position contacting with the fixed seat 55 just by the lifting seat 53, at the moment, the connecting assembly 56 is in a horizontal state, simultaneously, the fixing piece 32 is inserted into the driving seat 41, the movable strip 42 is moved out of the side arm 531 of the lifting seat 53, at the moment, the magnetic force between the lifting seat 53 and the movable seat 54 is eliminated, the electromagnetic ring 563 is also in a stopped state, then, when the piston head begins to apply the reaction force outwards, the clamping strip 21 drives the movable seat 22 to move to a side far away from the piston head, the pressing piece 621 drives the sliding cylinder 62 to move upwards, the lifting seat 53 which is not adsorbed and fixed with the movable seat 54 is separated from the movable seat 42, the sliding seat 521 falls to a position under the influence of gravity to the influence of the clamping seat 521 after the sliding seat is separated from the movable seat 42, the clamping seat is stopped, the clamping seat 521 is stopped when the clamping seat 53 is pressed back to the side arm 521 is manually adjusted to the position, and the clamping seat 53 is manually adjusted to be adjusted to the position corresponding to the position of the movable seat 53, and the lifting seat 53 is manually adjusted to the corresponding to the lifting seat 53.
Working principle:
firstly, performing a test on a piston head to be tested, and recording the maximum value of the first 252 and the second 33 pressure sensors when the first value is increased;
then, the piston head to be tested is soaked in the corresponding liquid medicine for a period of time, is taken out and drained, is placed in the groove 14, is positioned in the middle of the groove 14 through the electric push rod 141, is regulated to limit the top of the piston head by the first pressure handle 8, and is regulated to limit the top side of the piston head by the second pressure handle 9;
then, the lifting seat 53 is driven to move upwards by the driving seat 41, the lifting seat 53 synchronously drives the movable seat 54 to move upwards, and in the process of moving upwards the lifting seat 53, the first connecting arms 513 on two sides drive the second sliding seats 51 on two sides to mutually approach, so that the first two sliding seats 24 on the axial rebound mechanism 2 synchronously approach each other, and then drive the two clamping strips 21 to move towards one side close to the piston head, and meanwhile, the movable seat 54 drives the third sliding seat 61 to slide along the fixed frame 3 under the fixed length setting of the connecting assembly 56, so that the sliding cylinder 62 is controlled to move downwards by the second connecting arms 65, and then the pressing piece 621 is driven to move towards one side close to the piston head;
then, as the holding strip 21 and the pressing piece 621 move continuously, the holding strip 21 and the pressing piece 621 continue to apply force to the holding strip after contacting the piston head to squeeze the holding strip 21 and the pressing piece, when the boss 241 on the first slide 24 is separated from the top piece 222, namely the top piece 222 moves upwards in the moving seat 22 along the guide seat 23, the moving seat 54 rises to be contacted with the fixed seat 55 and connected integrally, the lifting seat 53 is disconnected with the moving seat 54, the fixed piece 32 is inserted into the driving seat 41 to enable the moving strip 42 to move out of the side arm 531, the electromagnetic ring 563 stops working at the moment, the connecting component 56 is in a state with adjustable length, the piston head starts to apply reverse force outwards, so that the holding strip 21 moves towards one side close to the piston piece 26 along a straight line, the first spring 27 works after the holding strip 21 contacts with the piston piece 26, so that the first pressure sensor 252 starts to change in value, the maximum value is recorded when the first maximum value is increased, the sliding cylinder 62 is driven upwards along the vertical direction, the third spring 64 works, the second pressure sensor 33 starts to change in value, the same maximum value is recorded, the first maximum value sensor can be increased in a plurality of times, and the first pressure sensor is tested and the first maximum value sensor is repeatedly and the first pressure sensor is tested and the first maximum value sensor is recorded and is again after the first maximum value is increased first value is measured and is repeatedly;
Finally, the differences of the maximum values of the numerical changes of the first 252 and second 33 pressure sensors are compared to determine how resistant the piston head is to a certain medical fluid.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; may be directly connected, may be in communication with the interior of two elements or may be in interaction with two elements. The meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The above describes in detail a drug resistance testing device for a piston head of an injector provided in the embodiment of the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, where the above description of the embodiment is only for helping to understand the technical solution and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (3)
1. A drug resistance testing device for a syringe piston head, comprising:
the test bed (1), be provided with on test bed (1) and soak groove (12), and install control terminal (11) of taking the PLC controller on its lateral wall, set up circular recess (14) on test bed (1), be provided with a plurality of electric putter (141) in recess (14), control piston head through starting electric putter (141) simultaneously and be located the intermediate position department of recess (14), and both sides at recess (14) are provided with stop gear, and still install mount (3) on test bed (1);
the axial rebound mechanism (2), axial rebound mechanism (2) sets up along the length direction of test bench (1), axial rebound mechanism (2) include holding strip (21), slide one (24) and piston spare (26), holding strip (21) are provided with two and symmetrical activity in the both sides of recess (14), one side of holding strip (21) is provided with mount pad (25) on test bench (1), piston spare (26) run through and set up on mount pad (25), and the outside cover of piston spare (26) is equipped with spring one (27), and inlay on the lateral wall of one side of mount pad (25) can with spring one (27) contact pressure-sensitive sensor one (252), one side below holding strip (21) is provided with in test bench (1) along the slip of straight line direction slide one (24);
The axial rebound mechanism (2) further comprises a moving seat (22) and a guide seat (23), an inner cavity (17) is formed in one side of the inside of the test bed (1), a guide rod I (28) arranged along the length direction of the test bed (1) is arranged between the inner walls of two sides of the inner cavity (17), a slide seat I (24) slides on the guide rod I (28), a boss (241) with a cylindrical structure is welded on the slide seat I (24), the guide seat (23) is arranged on the top wall of the inner cavity (17) through a screw and is positioned under the central position of the groove (14), the side walls of two sides of the guide seat (23) are all inclined surfaces, a shaft sleeve (251) is welded on one side wall of the installation seat (25), a piston part (26) also penetrates through the shaft sleeve (251), and the piston part (26) consists of a shaft rod and wafers welded on two ends of the shaft rod;
the test bench (1) is provided with a through hole II (15), the movable seat (22) slides on the upper surface of the test bench (1), a cavity is formed in the movable seat (22), a piston pin (221) moving along the vertical direction is elastically arranged in the cavity, a top piece (222) is welded on the bottom end of the piston pin (221), one side of the bottom end of the top piece (222) is also provided with an inclined surface, the top piece (222) penetrates through and slides between the inner walls of the through hole II (15), the inclined surface of the top piece (222) is matched with the inclined surface of the guide seat (23), and the highest point of the bulge (241) is positioned below the bottom surface of the guide seat (23);
The longitudinal rebound mechanism (6), the longitudinal rebound mechanism (6) comprises a sliding seat III (61), a sliding cylinder (62) and a pressing sheet (621), the sliding seat III (61) is arranged in a sliding manner along the horizontal direction of the fixed frame (3), the pressing sheet (621) is arranged at the bottom of the sliding cylinder (62), a guide shaft (63) is arranged in the middle of the fixed frame (3) in a penetrating manner, the sliding cylinder (62) and the pressing sheet (621) move in the position right above the groove (14) along the vertical direction, a spring III (64) is arranged outside the guide shaft (63) above the sliding cylinder (62), and a pressure sensor II (33) which can be contacted with the spring III (64) is embedded on the fixed frame (3);
the linkage mechanism (5), the linkage mechanism (5) includes the second slide (51), lifting seat (53), movable seat (54) and fixing base (55), still weld two fixed axles (52) between test bench (1) and mount (3), lifting seat (53) and movable seat (54) are all slipped on fixed axle (52), mount (55) are installed on mount (3) and are located directly over the connecting seat, second slide (51) is provided with two and its relative setting, and second slide (51) moves in test bench (1) along the rectilinear direction inside, second slide (51) is connected with first slide (24) and drives axially springback mechanism (2), be provided with coupling assembling (56) between movable seat (54) and the longitudinal springback mechanism (6), coupling assembling (56) can change its length according to the test needs;
The bottom end of the sliding seat III (61) and one side wall of the sliding seat III are respectively provided with a connecting seat III (612) and a connecting seat II (611) through screws, the top end of the sliding cylinder (62) is provided with two connecting grooves, the connecting seat III (612) and the connecting grooves are connected through shafts to form a connecting arm II (65), and the connecting seat II (611) is connected with one end of the connecting assembly (56);
the driving mechanism (4), the driving mechanism (4) is arranged along the vertical direction of the fixing frame (3), the driving mechanism (4) is connected with the lifting seat (53) in an inserting mode, the driving mechanism (4) comprises a driving seat (41) and a moving strip (42), the driving seat (41) is arranged in a convex structure, the driving seat (41) slides on the fixing frame (3) along the vertical direction, screw rods (31) which are arranged vertically are arranged on the side walls of two sides of the fixing frame (3), one end of each screw rod (31) is connected with a rotating motor, and each screw rod (31) penetrates through the driving seat (41) and is in threaded transmission fit with the driving seat (41);
side holes are formed in the side walls of the two sides of the driving seat (41), a second guide rod (412) which is arranged along the length direction of the side holes is arranged in the side holes, a second spring (43) is sleeved on the second guide rod (412), the moving strip (42) is arranged in the driving seat (41) in a penetrating mode along the horizontal direction, a sliding bolt (421) is welded on one side wall of the moving strip (42), the sliding bolt (421) slides on the second guide rod (412) and moves between the inner walls of the side holes, one end of the second spring (43) is in contact with the sliding bolt (421) in a propping mode, and the other end of the second spring (43) is welded on the inner wall of the side holes;
Two fixing pieces (32) of L-shaped structures which are symmetrically arranged are welded on the side walls of the two sides of the fixing frame (3), a through hole III (411) which is arranged in a penetrating manner is formed in the driving seat (41) under the fixing pieces (32), the through hole III (411) is matched with the fixing pieces (32), one side of the bottom end of the fixing piece (32) is provided with an inclined surface, a guide hole (422) is formed in the moving strip (42), the side wall of one side of the guide hole (422) is also provided with an inclined surface, and the inclined surface of the fixing piece (32) is matched with the inclined surface in the moving strip (42);
when the driving seat (41) moves upwards in the vertical direction, one end of the moving strip (42) is inserted into the side arm (531), the lifting seat (53) moves upwards synchronously, the movable seat (54) and the lifting seat (53) are connected into a whole, in the lifting movement process, the angle between two connecting arms on the same side is gradually reduced, two sliding seats (51) on the same guide rod III (512) are close to each other, the sliding seat I (24) moves synchronously with the sliding seat II (51), the clamping strip (21) moves linearly along with the side of the groove (14), the connecting assembly (56) synchronously drives the sliding seat III (61) to move towards the middle position of the fixed frame (3) along with the movable seat (54) in a fixed length, and the sliding seat III (61) pushes the sliding cylinder (62) downwards through the connecting arm II (65), so that the piston head is simultaneously subjected to a multidirectional acting force;
When the driving seat (41) moves to be in contact with the fixing piece (32), the fixing piece (32) pushes the moving strip (42) away from one side of the side arm (531) so that the driving seat (41) is separated from the lifting seat (53), meanwhile, the movable seat (54) is connected with the fixed seat (55) integrally and separated from the lifting seat (53), the connecting component (56) is in a state of freely adjusting the length and is in a horizontal state, meanwhile, the top piece (222) moves upwards along the inclination of the guide seat (23) to be separated from the boss (241), then the clamping strip (21) moves towards one side away from the groove (14) under the reaction force applied by the piston head and gradually applies a force to the spring I (27), meanwhile, the pressing piece (621) also moves upwards away from the groove (14) under the reaction force applied by the piston head and applies a force to the spring III (64) through the sliding cylinder (62), one end of the shaft (562) slides along the sliding cylinder III (61) between the inner walls of the fixed cylinder (561) to be in a pressure-sensitive state, and the sliding seat (53) is in a pressure-sensitive state, and the pressure sensor (521) is sensitive to the pressure-sensitive state of the two-sensitive flat-plate (521) is initially changed.
2. The device for testing the drug resistance of the piston head of the injector according to claim 1, wherein two clamping bases (521) which are symmetrically installed are elastically arranged on the fixed shaft (52), the lower surface of the clamping base (521) is provided with an inclined surface, the upper surface of the clamping base (521) is provided with a plane, side arms (531) are welded on the side walls of the two sides of the lifting base (53), strip holes which are matched with the movable strip (42) are formed in the side arms (531), and a connecting shaft is welded on the side wall of the other side of the lifting base (53);
the movable seat (54) can be connected with the lifting seat (53) and the fixed seat (55) into a whole through magnetic force, an integrated connecting seat IV is arranged on the side wall of the movable seat (54), the connecting assembly (56) comprises a fixed cylinder (561), a movable shaft (562) and an electromagnetic ring (563), connecting pieces are arranged at one end of the fixed cylinder (561) and one end of the movable shaft (562), the two connecting pieces are respectively arranged between the connecting seat IV and the side wall of the connecting seat II (611) through shaft connection, the electromagnetic ring (563) is further arranged at one end of the fixed cylinder (561), the movable shaft (562) penetrates through the electromagnetic ring (563) to be arranged, one end of the movable shaft (562) always slides between the inner walls of the fixed cylinder (561), and the movable shaft (562) and the electromagnetic ring (563) can be fixed into a whole through magnetic force adsorption;
Two guide rods III (512) which are horizontally and symmetrically arranged are further arranged between the side walls of the inner cavity (17), the sliding seat II (51) is arranged on the guide rods III (512) in a sliding mode, the sliding seat II (51) is provided with a connecting seat I (514) through a screw, the side walls of the connecting seat I (514) are connected through a shaft, a connecting arm I (513) is arranged between the side walls of the connecting seat I (514) in a connecting shaft which is located on the same side with the connecting arm I (513), and a connecting rod (511) is arranged between the sliding seat II (51) and the sliding seat I (24) in a plugging mode.
3. The device for testing the drug resistance of the piston head of the syringe according to claim 2, wherein the limiting mechanism comprises a fixing strip (7), a first pressing handle (8) and a second pressing handle (9), the fixing strip (7) is provided with two through holes (71) which are arranged along the vertical direction and are respectively fixed on two sides of the groove (14) through screws, one end of the first pressing handle (8) is slidably arranged between the inner walls of the through holes (71), the first pressing handle (8) is fixedly connected with the fixing strip (7) through a set screw, a sliding sheet (91) is slidably arranged on the first pressing handle (8), the second pressing handle (9) is welded on the bottom wall of the sliding sheet (91), the second pressing handle (9) is arranged in an arc-shaped structure, and the sliding sheet (91) is fixedly connected with the first pressing handle (8) through the set screws.
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| CN202311686352.2A CN117388099B (en) | 2023-12-11 | 2023-12-11 | Drug resistance testing device of syringe piston head |
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| CN202311686352.2A CN117388099B (en) | 2023-12-11 | 2023-12-11 | Drug resistance testing device of syringe piston head |
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