CN110237365B - Medical injection device capable of replacing medicine bottle - Google Patents
Medical injection device capable of replacing medicine bottle Download PDFInfo
- Publication number
- CN110237365B CN110237365B CN201910609910.2A CN201910609910A CN110237365B CN 110237365 B CN110237365 B CN 110237365B CN 201910609910 A CN201910609910 A CN 201910609910A CN 110237365 B CN110237365 B CN 110237365B
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- China
- Prior art keywords
- push rod
- injection device
- transmission
- clutch
- medical injection
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- 239000003814 drug Substances 0.000 title claims abstract description 55
- 238000010999 medical injection Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 59
- 238000010862 gear shaping Methods 0.000 claims description 17
- 210000003205 muscle Anatomy 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 23
- 239000007924 injection Substances 0.000 description 23
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000009513 drug distribution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31525—Dosing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M2005/2026—Semi-automatic, e.g. user activated piston is assisted by additional source of energy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
- A61M2205/581—Means for facilitating use, e.g. by people with impaired vision by audible feedback
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
- A61M2205/582—Means for facilitating use, e.g. by people with impaired vision by tactile feedback
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a medical injection device capable of replacing a medicine bottle, which comprises an outer barrel and a pen cap, wherein a detachable medicine bin is arranged at one end of the outer barrel, a replaceable standard clamping medicine bottle is arranged in the medicine bin, a fixed sleeve is arranged at one end, close to the medicine bin, of the inner part of the outer barrel, a push rod seat is axially arranged in the fixed sleeve in a moving manner, a transmission ring capable of being meshed with the end part of a transmission rod is arranged in the push rod seat, a ratchet ring capable of axially sliding is sleeved on the outer side of the transmission rod, one end face of the ratchet ring is in one-way meshed with the inner part of the outer barrel, a first spring is axially arranged at the other end of the ratchet ring, a second spring propped against the outer barrel is axially arranged at one end of the push rod seat, and one end of the push rod penetrates through the push rod seat and extends into the standard clamping medicine bottle to be connected with a push block. The invention has simple structure, and can realize repeated use by adopting a brand new push rod return transmission mechanism.
Description
Technical Field
The invention relates to the field of injection pens, in particular to a medical injection device with a replaceable medicine bottle.
Background
An injection pen is a medical instrument widely used in clinical medicine for injection of medicaments.
At present, a disposable sterile injector is mainly adopted for drug injection in the market, but the injection process needs to be carried out in a hospital and operated and injected by professionals, and the operation convenience is not suitable for self management of most chronic patients. At present, the pure mechanical injection pen is optimal in structural safety and reliability in the process of realizing accurate drug distribution, such as screw transmission, clutch transmission, tactile feedback and the like.
The prior injection pen has poor universality, and the push rod of the prior injection pen cannot be retracted after the medicament is injected, so that the injection pen is disposable, the prior injection pen is high in price, and the disposable injection pen is a small expenditure for patients needing injection for a long time.
The existing injection pen capable of being reused is high in price and short in service life, the push rod is retracted relatively complex, the operation is not good, the injection pen is easy to be blocked, the tactile and audible prompt functions during injection are not available, and the use effect is poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing a medical injection device capable of replacing a medicine bottle, which has a simple structure, and can be reused by adopting a brand new push rod return transmission mechanism.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a medical injection device of removable medicine bottle, including urceolus and pen cap, the inside of urceolus from outside to inside have arranged dose cylinder, differential lever and transfer line in proper order, the inside wall of dose cylinder and the inside wall threaded connection of urceolus and be provided with the clutch in the one end of dose cylinder, the both ends of clutch respectively with the one end of dose cylinder and differential lever one end can the unidirectional transmission associatively, the one end of clutch install trigger button, the inside axial of transfer line be provided with threaded push rod, the one end of urceolus be provided with detachable medicine storehouse, the medicine storehouse in be provided with removable standard card formula medicine bottle, the inside of urceolus be provided with the fixed cover near the one end of medicine storehouse, the inside axial displacement of fixed cover be provided with the push rod seat, the inside of push rod seat be provided with the transmission ring that can mesh with the tip of transfer line, the outside of transfer line cup joint can the axial sliding ratchet ring, one end and the inside one end of urceolus install trigger button, the one end and the inside ratchet ring the urceolus the inside the push rod one end, the axial spring that stretches into the push rod seat is provided with the axial spring that the push rod is connected with the push rod seat, the one end of push rod is passed to the standard push rod seat.
As a supplement to the technical proposal of the invention, a threaded sleeve is arranged between the inside of the outer cylinder and one end of the dosage cylinder, which is close to the trigger button.
Further, the fixed sleeve is cylindrical, one end of the fixed sleeve is provided with a plurality of buckling strips which are buckled and fixed with the inner side wall of the outer cylinder, and a plurality of guide ribs are uniformly arranged in the middle of the inner side wall of the fixed sleeve around the circumference.
Further, fixed cover other end both sides lateral wall on central symmetry be provided with and be curved direction catching groove, the inside wall of fixed cover on be provided with the arc guide way that is linked together with the direction catching groove, the inside wall of fixed cover on be located the below of direction catching groove and be provided with the constant head tank, the one end lateral wall in medicine storehouse on both sides be provided with the joint arch that matches with the direction catching groove, one side of joint arch be provided with the location arch that matches with the constant head tank.
Further, the inside of push rod seat be provided with well seat platform, the lateral wall of push rod seat be provided with a plurality of around the circumference and extend to well seat platform and with the guide way that the guide bar matches, the inside wall of push rod seat on be located the position between the adjacent guide way and be provided with spacing muscle, the transmission ring set up in well seat platform upside middle part and carry out the axial spacing by spacing muscle, the middle part of well seat platform be provided with the screw hole that supplies the push rod to pass.
Furthermore, the driving ring is disc-shaped, one end of the driving ring and the end part of the driving rod are respectively provided with a circle of gear shaping teeth which can be meshed with each other, and protruding strips which are embedded into axial grooves on two sides of the push rod (9) are symmetrically arranged in an inner hole of the driving ring.
Further, axial guide grooves are symmetrically formed in the side walls of the two sides of the transmission rod, and guide protrusions embedded into the axial guide grooves are formed in the inner holes of the ratchet ring and in the inner side wall of one end of the differential rod.
Further, one end of the differential rod is internally provided with a circle of first unidirectional convex teeth, one end of the dosage cylinder is internally provided with a circle of second unidirectional convex teeth, and the outer sides of the two ends of the clutch are respectively provided with a first elastic sheet and a second elastic sheet which are matched with the first unidirectional convex teeth and the second unidirectional convex teeth.
Further, the inside of trigger button be provided with cup joint the post that cup joints on clutch upper portion, the upper end of clutch be tip, tip and cup joint the inboard top of post and prop up, the lower extreme inside wall of cup joint the post on be provided with round spacing recess, the outside of clutch corresponding position be provided with round spacing bulge loop.
Further, a circle of limiting step is arranged in the outer cylinder and close to the position of the fixed sleeve, an inner hole of the limiting step is embedded into a circle of limiting concave section on the outer side of the transmission rod, and one end of the limiting step is meshed with one end of the ratchet ring in a one-way mode.
The beneficial effects are that: the invention relates to a medical injection device capable of replacing a medicine bottle, which has compact and reasonable structure, adopts a brand new push rod retreating structure, adopts a convenient and fast detachable medicine bin, so that the medicine bottle is more convenient to replace, the push rod can be retreated while the medicine bin is replaced, no clamping and interference can occur when the medicine bin retreats, the operation is very simple, and the repeated use of an injection pen is realized; the threaded sleeve is arranged, so that excessive abrasion of the outer barrel and the dosage barrel can be reduced when the injection pen is used repeatedly, and the service life of the injection pen is prolonged; the injection and dosage adjusting have the prompt functions of touch sense and hearing sense, have good using sense and have good popularization value.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front semi-sectional view of the present invention;
FIG. 3 is an enlarged block diagram of FIG. 2 at A;
FIG. 4 is an enlarged block diagram of FIG. 2 at B;
FIG. 5 is a perspective view of the fixing sleeve of the present invention;
FIG. 6 is a semi-sectional view of the retaining sleeve of the present invention;
FIG. 7 is a perspective view of a dosage drum of the present invention;
FIG. 8 is a perspective view of the differential lever of the present invention;
FIG. 9 is a perspective view of the putter seat of the present invention;
FIG. 10 is a perspective view of the cartridge of the present invention;
FIG. 11 is a partial structural perspective view of the present invention;
fig. 12 is a perspective view of the drive ring of the present invention.
The diagram is: 1. a cap; 2. an outer cylinder; 3. standard card type medicine bottle; 4. triggering a button; 5. a clutch; 6. a limit groove; 7. a dosage cylinder; 8. a differential lever; 9. a push rod; 11. a ratchet ring; 12. a fixed sleeve; 13. a push rod seat; 14. a medicine bin; 15. a limit step; 16. a second spring; 17. a first spring; 18. a pushing block; 19. a drive ring; 20. a threaded sleeve; 21. a transmission rod; 51. a second elastic sheet; 53. a tip portion; 54. a first elastic sheet; 55. a limit bulge loop; 71. a second unidirectional lobe; 81. a first unidirectional lobe; 82. a guide protrusion; 91. an axial groove; 121. a guide buckle groove; 122. a buckling strip; 123. a positioning groove; 124. an arc-shaped guide groove; 125. a guide rib; 131. a middle seat; 132. a limit rib; 133. a guide groove; 134. a threaded hole; 141. the clamping bulge; 142. positioning the bulge; 211. an axial guide groove; 212. gear shaping; 213. a protruding strip; 214. limiting the concave section.
Detailed Description
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
As shown in fig. 1-12, the technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a medical injection device of removable medicine bottle, including urceolus 2 and pen cap 1, the inside of urceolus 2 arrange dose barrel 7, differential lever 8 and transfer line 21 from outside to inside in proper order, the inside wall of dose barrel 7 and the inside wall threaded connection of urceolus 2 and be provided with clutch 5 in the one end of dose barrel 7, the both ends of clutch 5 respectively with the one end of dose barrel 7 and the one end of differential lever 8 can one-way transmission be associatively moved, the one end of clutch 5 install trigger button 4, the inside axial of transfer line 21 be provided with threaded push rod 9, the one end of urceolus 2 be provided with detachable medicine storehouse 14, medicine storehouse 14 in be provided with removable standard card formula medicine bottle 3, the inside of urceolus 2 be close to medicine storehouse 14 be provided with fixed cover 12, the inside axial displacement of fixed cover 12 be provided with push rod seat 13, the inside of push rod seat 13 be provided with can with the drive ring 19 with the tip of transfer line 21 respectively, the inside of push rod seat 21 is provided with the push rod 9, the inside of push rod seat 11 is provided with the axial extension spring 11 to the one end of push rod seat 2, the one end of push rod seat is connected with the one end of ratchet wheel 11, the one end of push rod seat is provided with the ratchet wheel 11, the one end is connected with the axial extension spring 11 to the inside of push rod 11, and the one end of push rod 11 is provided with the ratchet wheel seat 11.
The utility model discloses a dose barrel, including urceolus 2, dose barrel 7, urceolus 2, the inside of urceolus 2 and dose barrel 7 between be close to trigger button 4 one end be provided with screw thread sleeve 20, the pen of repeatedly using has the frequency of use of great number of times, urceolus 2 and dose barrel 7 have certain wearing and tearing, urceolus 6 and screw thread sleeve 7's structure can effectively alleviate the wearing and tearing volume, wherein the interior pore wall of urceolus 2 has protruding draw-in groove to be connected with screw thread sleeve 20's outer wall draw-in groove when screw thread sleeve 20 installs, makes screw thread sleeve unable rotation, screw thread sleeve 20's outer wall draw-in groove is a discontinuous draw-in groove, he is connected with urceolus 2's hole wall draw-in groove, their structure is a screens, screw thread sleeve 20 packs into the urceolus in can prevent to drop.
The screw sleeve 20 is internally provided with a spiral convex rib matched with a spiral groove on the outer side of the dosage drum 7, and the spiral convex rib is a trapezoidal transmission screw thread with good rotating and moving functions, and no clamping and self locking can be generated during screw matching transmission.
The fixed sleeve 12 is cylindrical, one end of the fixed sleeve is provided with a plurality of buckling strips 122 which are buckled and fixed with the inner side wall of the outer cylinder 2, the middle part of the inner side wall of the fixed sleeve 12 is uniformly provided with a plurality of guide ribs 125 around the circumference, the guide ribs 125 can guide the axial movement of the push rod seat 13, and the buckling strips 122 can enable the fixed sleeve 12 to be installed rapidly.
The utility model provides a medicine storehouse, including fixed cover 12, the inside wall of fixed cover 12, the both sides lateral wall of fixed cover 12 on the central symmetry be provided with and be curved guide slot 121, the inside wall of fixed cover 12 on be provided with the arc guide slot 124 that is linked together with guide slot 121, the inside wall of fixed cover 12 on be provided with constant head tank 123 in the below of guide slot 121, the one end lateral wall of medicine storehouse 14 on both sides be provided with the joint arch 141 that matches with guide slot 121, one side of joint arch 141 be provided with the location arch 142 that matches with constant head tank 123, during the use, insert the one end of fixed cover 12 with medicine storehouse 14, then rotate the joint arch 141 and upwards be certain along arc guide slot 124 to finally block into guide slot 121, the joint arch 141 also can block into constant head tank 123 in, make medicine storehouse 14 firm not hard up.
The inside of push rod seat 13 be provided with well seat platform 131, the lateral wall of push rod seat 13 be provided with a plurality of around the circumference and extend to well seat platform 131 and with guide bar 125 matched guide groove 133, the inside wall of push rod seat 13 on be located the position between the adjacent guide groove 133 and be provided with spacing muscle 132, drive ring 19 set up in well seat platform 131 upside middle part and carry out the axial spacing by spacing muscle 132, well seat platform 131's middle part be provided with the screw hole 134 that supplies push rod 9 to pass, the effect of spacing muscle 132 is just to make drive ring 19 unable axial displacement, can only rotate, can axial propelling when screw hole 134 makes push rod 9 rotate.
The transmission ring 19 is disc-shaped, one end of the transmission ring 19 and the end part of the transmission rod 21 are respectively provided with a circle of gear shaping 212 capable of being meshed with each other, protruding strips 213 embedded into axial grooves 91 on two sides of the push rod 9 are symmetrically arranged in an inner hole of the transmission ring 19, after the medicine bin 14 is disassembled, the push rod seat 13 can axially move, the gear shaping 212 between the transmission ring 19 and the transmission rod 21 is separated, then the push rod 9 can retract, and when the gear shaping 212 between the transmission ring 19 and the transmission rod 21 is meshed, the transmission rod 21 can drive the transmission ring 19 to rotate, and the transmission ring 19 can drive the push rod 9 to rotate through the protruding strips 213 and the axial grooves 91, so that the axial movement of the push rod 9 is realized.
Axial guide grooves 211 are symmetrically formed in the side walls of the two sides of the transmission rod 21, guide protrusions 82 embedded into the axial guide grooves 211 are formed in the inner holes of the ratchet ring 11 and in the inner side wall of one end of the differential rod 8, so that the differential rod 8 can drive the transmission rod 21 to rotate, and the rotation of the transmission rod 21 can drive the ratchet ring 11 to rotate.
One end of the differential rod 8 is internally provided with a circle of first unidirectional convex teeth 81, one end of the dosage cylinder 7 is internally provided with a circle of second unidirectional convex teeth 71, and the outer sides of the two ends of the clutch 5 are respectively provided with a first elastic sheet 54 and a second elastic sheet 51 which are matched with the first unidirectional convex teeth 81 and the second unidirectional convex teeth 71.
The inside of trigger button 4 be provided with cup joint the post that cup joints in clutch 5 upper portion, the upper end of clutch 5 be tip portion 53, tip portion 53 and cup joint the inboard top of post and prop up, the lower extreme inside wall of cup joint the post on be provided with round spacing recess 6, the outside of clutch 5 correspond the position and be provided with round spacing bulge loop 55, the bellied cambered surface is made to the top surface of trigger button 4, the button that reduces the eccentricity of button when pressing the operation brought cuts the friction resistance with the inner wall of dosage section of thick bamboo, tip portion 53 and the cup joint post top point contact of trigger button 4 of clutch inner column make trigger button 4 rotate on this fulcrum, reduce the resistance, spacing bulge loop 55 and the spacing recess 6 cooperation of trigger button 4 of clutch week prevent that trigger button 4 from droing.
The inside of urceolus 2 be close to fixed cover 12 the position be provided with round spacing step 15, the hole of spacing step 15 imbeds in the spacing indent section 214 of round outside transfer line 21, the one end of spacing step 15 and the one end one-way meshing of ratchet ring 11, the recessed round 15 of transfer line, spacing indent section 214 and spacing step 15 matched with effect is to prevent under spring pressure and self gravity effect transfer line 21 whereabouts, the gear shaping 212 of transfer line 21 tip interferes with the gear shaping 212 of transfer line 19 and produces the resistance for interfere the card and stop when changing medicine bottle back pressure push rod 9.
As an embodiment of the present invention:
specific operations include dose adjustment, dose callback, injection and vial replacement.
Dose adjustment: when the device is used, the dose setting is carried out, the dose cylinder 7 is rotated in the forward direction, the second unidirectional convex teeth 71 on the dose cylinder 7 act on the second elastic sheet 51 of the clutch 5, the clutch 5 does not rotate due to unidirectional engagement, the dose cylinder 7 is spirally connected with the outer cylinder 2, the dose cylinder 7 moves axially, namely, axial displacement to one end of the trigger button 4 is generated, the differential rod 8 and the trigger button 4 are propped against and also axially displaced in the backward direction by the backward axial displacement of the clutch 5, the first elastic sheet 54 of the clutch 5 and the first unidirectional convex teeth 81 are also in unidirectional engagement, the differential rod 8 cannot be driven to rotate, the differential rod 8 does not rotate, the clutch 5 does not rotate, but the cooperation between the second elastic sheet 51 and the second unidirectional convex teeth 71 can generate audible indication, and meanwhile, the dose cylinder 7, the trigger button 4 and the differential rod 8 are ejected to the rear end to push out 2, and the metering setting is completed.
Dose callback, reversely rotating the dose drum 7, namely anticlockwise rotating the dose drum 7, wherein the second unidirectional convex teeth 71 are matched with the second elastic sheets 51 of the clutch 5 to drive the clutch 5 to rotate, but the push block 18 applies reverse acting force to the push rod 9, so that the push rod 9 cannot rotate and axially leftwards, the transmission rod 21 cannot drive the differential rod 8 to rotate, the differential rod 8 cannot move, the first unidirectional convex teeth 81 of the first elastic sheets 54, which are in contact with the differential rod 8, of the clutch 5 generate audible indication, and the dose drum 7 moves leftwards axially to drive the trigger button 4 and the differential rod 8 to leftwards move to realize callback dose.
Injection: when the trigger button 4 is pressed, the dose drum 7 is pressed to axially move forward to reversely rotate, the second unidirectional convex teeth 71 of the dose drum 7 drive the clutch 5 to rotate, at this time, the first elastic piece 54 matched with the differential lever 8 by the clutch 5 cannot drive, but presses, so that the mountain-shaped convex teeth at one end of the differential lever 8 are meshed with the axial convex teeth on the dose drum 7, the rotation of the dose drum 7 drives the differential lever 8 to reversely rotate, the rotation of the differential lever 8 drives the rotation of the transmission lever 21, and the gear shaping 212 at the end part of the transmission lever 21 is meshed with the gear shaping 212 on the transmission ring 19, so that the transmission lever 21 drives the transmission ring 19 to rotate, the transmission ring 19 drives the push rod 9 to rotate, and the push rod 9 and the push rod seat 13 realize injection.
Changing the medicine bottle: the left-hand medicine bin 14, the medicine bin 14 is separated from the fixed sleeve 12, the push rod seat 13 moves towards the opening direction of the medicine bin 14 under the action of the second spring 16, the sliding structure of the push rod seat 13 is matched with the fixed sleeve 12 to do linear displacement, the transmission ring 19 is pressed in the push rod seat 13 through the limit rib 132 structure of the push rod seat 13, and along with the movement of the push rod seat 13, the gear shaping 212 at one end of the transmission ring 19 is separated from the gear shaping 212 at one end of the transmission rod 21. The pushing distance is set by a limiting clamping groove on the push rod seat 13, so that the pushing distance is larger than the opening distance of the transmission ring 19 and the transmission rod 21 placed in the gear shaping 212, and the pushing distance is not interfered. At this time, the push block 18 is pressed, the push plate 18 is connected with the push rod 9 through a fastening structure, the push rod 9 rotates and moves towards the outer cylinder 2 through the threaded hole 134 of the push rod seat 13, the axial groove 91 on the push rod 9 is connected with the convex strip 213 of the transmission ring 21, the gear shaping 212 of the transmission ring 19 and the gear shaping 212 of the transmission rod 21 are in a disengaged state, the push rod 9 rotates and moves to drive the transmission ring 19 to rotate, the transmission ring 19 does not axially move, and the axial groove 91 on the push rod 9 simultaneously moves in a matched mode on the convex strip 213 of the transmission ring 19 until the push block 18 is pressed to the bottom.
In contrast, the medicine bin 14 is screwed, the standard clamping medicine bottle 3 is arranged in the medicine bin 14, the end face of the standard clamping medicine bottle 3 presses the end face of the push rod seat 13, the push rod seat 13 moves and compresses the second spring 16 to drive the driving ring 19 to move, the gear shaping 212 at one end of the driving ring 19 is meshed with the gear shaping 212 at one end of the driving rod 21 to form a transmission whole, when the injection pen is injected, the driving rod 21 rotates, the ratchet ring 11 is driven to rotate through the axial guide groove 211 on the driving rod 21, and the ratchet ring 11 can bounce and rotate under the action of the spring and is matched with the limiting step 15 to generate touch sense and auditory prompt.
The invention has simple structure, and can realize repeated use by adopting a brand new push rod return transmission mechanism.
Claims (10)
1. The utility model provides a medical injection device of removable medicine bottle, includes urceolus (2) and pen cap (1), the inside of urceolus (2) from outside to inside arrange dose cylinder (7), differential lever (8) and transfer line (21) in proper order, the lateral wall of dose cylinder (7) and the inside wall threaded connection of urceolus (2) and be provided with clutch (5) in the one end of dose cylinder (7), the both ends of clutch (5) respectively with one end of dose cylinder (7) and one end of differential lever (8) can one-way transmission ground association, one end of clutch (5) install trigger button (4), characterized in that, the inside axial of transfer line (21) be provided with threaded push rod (9), one end of urceolus (2) be provided with detachable medicine storehouse (14), the inside of medicine storehouse (14) be provided with removable standard card medicine bottle (3), the one end that is close to medicine storehouse (14) of inside be provided with fixed cover (12), the one end that is provided with inside of clutch (5) is provided with fixed cover (21) can one-way transmission, the axial direction of push rod (21) is provided with the inside of push rod (21) and the inside of drive line (13) can be provided with the axial direction of push rod (13) and the inside of drive line (13), one end face of the ratchet ring (11) is in one-way engagement with the inside of the outer cylinder (2), the other end axial of the ratchet ring (11) is provided with a first spring (17), one end of the push rod seat (13) is axially provided with a second spring (16) which is propped against the outer cylinder (2), and one end of the push rod (9) penetrates through the push rod seat (13) to extend into the standard card type medicine bottle (3) to be connected with the push block (18).
2. The replaceable medical injection device of claim 1 wherein: a threaded sleeve (20) is arranged between the inside of the outer barrel (2) and one end, close to the trigger button (4), of the dosage barrel (7).
3. The replaceable medical injection device of claim 1 wherein: the fixing sleeve (12) is cylindrical, one end of the fixing sleeve is provided with a plurality of buckling strips (122) which are buckled and fixed with the inner side wall of the outer cylinder (2), and the middle part of the inner side wall of the fixing sleeve (12) is uniformly provided with a plurality of guide ribs (125) around the circumference.
4. A medical injection device of a replaceable medicine bottle according to claim 3, wherein: the utility model provides a fixed cover (12) other end both sides lateral wall on central symmetry be provided with and be curved direction catching groove (121), the inside wall of fixed cover (12) on be provided with arc guide way (124) that are linked together with direction catching groove (121), the inside wall of fixed cover (12) on be located the below of direction catching groove (121) and be provided with constant head tank (123), the one end lateral wall of medicine storehouse (14) on both sides be provided with joint arch (141) that match with direction catching groove (121), one side of joint arch (141) be provided with constant head tank (123) matched location arch (142).
5. A medical injection device of a replaceable medicine bottle according to claim 3, wherein: the inside of push rod seat (13) be provided with well seat platform (131), the lateral wall of push rod seat (13) be provided with a plurality of around the circumference and extend to well seat platform (131) and guide slot (133) that match with direction muscle (125), the inside wall of push rod seat (13) on be located the position between adjacent guide slot (133) and be provided with spacing muscle (132), transmission ring (19) set up in well seat platform (131) upside middle part and carry out the axial spacing by spacing muscle (132), the middle part of well seat platform (131) be provided with screw hole (134) that supplies push rod (9) to pass.
6. The replaceable medical injection device of claim 5 wherein: the transmission ring (19) is disc-shaped, one end of the transmission ring and the end part of the transmission rod (21) are respectively provided with a circle of gear shaping teeth (212) which can be meshed with each other, and protruding strips (213) which are embedded into axial grooves (91) on two sides of the push rod (9) are symmetrically arranged in an inner hole of the transmission ring (19).
7. The replaceable medical injection device of claim 1 wherein: axial guide grooves (211) are symmetrically formed in the side walls of the two sides of the transmission rod (21), and guide protrusions (82) embedded into the axial guide grooves (211) are formed in the inner hole of the ratchet ring (11) and in the inner side wall of one end of the differential rod (8).
8. The replaceable medical injection device of claim 1 wherein: one end of the differential rod (8) is internally provided with a circle of first unidirectional convex teeth (81), one end of the dosage cylinder (7) is internally provided with a circle of second unidirectional convex teeth (71), and the outer sides of two ends of the clutch (5) are respectively provided with a first elastic sheet (54) and a second elastic sheet (51) which are matched with the first unidirectional convex teeth (81) and the second unidirectional convex teeth (71).
9. The replaceable medical injection device of claim 1 wherein: the inside of trigger button (4) be provided with cup joint the post that cup joints on clutch (5) upper portion, the upper end of clutch (5) be tip portion (53), tip portion (53) and cup joint the inboard top of post and prop up, the lower extreme inside wall of cup joint the post on be provided with round spacing recess (6), the outside of clutch (5) corresponding position be provided with round spacing bulge loop (55).
10. The replaceable medical injection device of claim 1 wherein: the inner part of the outer cylinder (2) is provided with a circle of limiting step (15) at a position close to the fixed sleeve (12), an inner hole of the limiting step (15) is embedded into a circle of limiting concave section (214) at the outer side of the transmission rod (21), and one end of the limiting step (15) is in one-way meshing with one end of the ratchet ring (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910609910.2A CN110237365B (en) | 2019-07-08 | 2019-07-08 | Medical injection device capable of replacing medicine bottle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910609910.2A CN110237365B (en) | 2019-07-08 | 2019-07-08 | Medical injection device capable of replacing medicine bottle |
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| CN110237365A CN110237365A (en) | 2019-09-17 |
| CN110237365B true CN110237365B (en) | 2024-02-23 |
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| CN201910609910.2A Active CN110237365B (en) | 2019-07-08 | 2019-07-08 | Medical injection device capable of replacing medicine bottle |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114471768B (en) * | 2022-04-09 | 2022-06-28 | 显陆(常州)科技有限公司 | Repeatedly usable's portable liquid material conveyor |
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| EP2364739A1 (en) * | 2010-03-09 | 2011-09-14 | Sanofi-Aventis Deutschland GmbH | Re-usable autoinjector |
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| CN106983931A (en) * | 2017-05-08 | 2017-07-28 | 甘肃成纪生物药业有限公司 | A kind of injection pen |
| WO2018205409A1 (en) * | 2017-05-08 | 2018-11-15 | 甘肃成纪生物药业有限公司 | Injection pen |
| CN109107003A (en) * | 2018-09-13 | 2019-01-01 | 张露 | A kind of novel injection pen |
| CN211068478U (en) * | 2019-07-08 | 2020-07-24 | 耿旭升 | Medical injection device with replaceable medicine bottle |
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| US4560377A (en) * | 1983-01-24 | 1985-12-24 | Sicim Spa | Endermic injector device |
| EP2364739A1 (en) * | 2010-03-09 | 2011-09-14 | Sanofi-Aventis Deutschland GmbH | Re-usable autoinjector |
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| Publication number | Publication date |
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| CN110237365A (en) | 2019-09-17 |
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