CN107875487B - High-precision pen type injector - Google Patents
High-precision pen type injector Download PDFInfo
- Publication number
- CN107875487B CN107875487B CN201711021979.0A CN201711021979A CN107875487B CN 107875487 B CN107875487 B CN 107875487B CN 201711021979 A CN201711021979 A CN 201711021979A CN 107875487 B CN107875487 B CN 107875487B
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- ratchet
- spiral
- knob
- hole
- fixed
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- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 229940090048 pen injector Drugs 0.000 claims description 7
- 239000003814 drug Substances 0.000 abstract description 17
- 230000033001 locomotion Effects 0.000 description 7
- 239000011295 pitch Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 241000463219 Epitheca Species 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 2
- 102000004877 Insulin Human genes 0.000 description 1
- 108090001061 Insulin Proteins 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229940125396 insulin Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 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
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
-
- 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
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
- A61M5/31541—Means preventing setting of a dose beyond the amount remaining in the cartridge
-
- 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
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
-
- 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
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
- A61M5/31583—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
- A61M5/31586—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod performed by rotationally moving or pivoted actuator, e.g. an injection lever or handle
-
- 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
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
- A61M2005/2403—Ampoule inserted into the ampoule holder
Abstract
The invention relates to a high-precision pen-type injector, which comprises an injection button, a dose adjusting knob, a clutch ratchet, a clutch spring, a spiral sleeve, a screw rod, a spiral ratchet, a fixed ratchet assembly, a main body upper shell, a reset knob, a reset spring, a medicine silo and a dose display sleeve, wherein the screw rod is in threaded connection with a threaded hole of the spiral ratchet, a matching plane is arranged on the screw rod, a reset knob hole which is matched with the screw rod in a flat mode is arranged on the reset knob, the reset knob is arranged on the screw rod through the reset knob hole, a second one-way ratchet is arranged on the end face of the reset knob, a first one-way ratchet matched with the second one-way ratchet is arranged on the fixed ratchet assembly, one end of the reset spring abuts against the reset knob, the other end of the reset spring abuts against the fixed ratchet assembly, and the medicine cartridge silo is fixedly connected with the end of the main body upper shell. The invention has the advantages of labor saving and high injection precision.
Description
Technical Field
The invention relates to a medical injector, in particular to a pen type high-precision injector.
Background
The injector is widely applied in the medical field and is used for injecting bottled liquid medicine. For high-precision injection of drugs, such as insulin injections, the dose to be injected is different for each patient, and glass vials are equivalent, so that the conventional syringes cannot meet the requirements. The accuracy of the conventional direct-pushing injection pen is difficult to control, and a large pushing force is required to push the piston rod.
Disclosure of Invention
The invention aims to provide a pen-type injector which saves labor in injection and has high injection precision.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the utility model provides a high accuracy pen injector, including injection button, dose knob, separation and reunion ratchet, separation and reunion spring, screw sleeve, screw rod, spiral ratchet, fixed ratchet subassembly, main part epitheca, reset knob, reset spring, medicine silo and dose display sleeve, dose display sleeve fixes in the downthehole of main part epitheca, and dose display sleeve's hole has first helicla flute, dose knob periphery is equipped with the second helicla flute, first helicla flute and second helicla flute cooperation, the first interior hole inner wall of dose knob has bayonet socket and the first meshing tooth of axial arrangement, the screw sleeve is through fixed ratchet subassembly upper and lower sliding limit in the downthehole of main part epitheca, the screw sleeve periphery is equipped with spiral ply-yarn groove, spiral ply-yarn groove and bayonet socket threaded connection, the separation and reunion ratchet is located the first interior hole of dose knob, and have the second meshing tooth of the axial arrangement with first meshing tooth cooperation, and the tip card of injection button and separation and reunion ratchet installs, the second interior hole inner wall of spiral ratchet has axial location arch, the axial location ratchet, the axial location is protruding, the spiral ratchet is equipped with the reset knob is stretched into with the flat knob on the side of the spiral knob, the spiral knob is the reset knob, the axial extension is equipped with the reset knob, the reset knob is connected with the spiral hole, the one end of the spiral knob is connected with the spiral hole, the spiral knob is stretched out on the side of the hole, the fixed ratchet wheel assembly is provided with a first unidirectional ratchet wheel matched with the second unidirectional ratchet wheel, one end of the reset spring is propped against the reset knob, the other end of the reset spring is propped against the fixed ratchet wheel assembly, and the cartridge bin is fixedly connected with the end part of the main body upper shell.
The end of the main body upper shell is provided with a notch, the dose display sleeve is provided with a transparent display window, the transparent display window is positioned at the notch of the main body upper shell, and a spiral scale bar is arranged at the second spiral groove of the dose adjusting knob.
The fixed ratchet wheel assembly comprises a limit clamping ring, a limit shaft sleeve and a fixed ratchet wheel, wherein an elastic buckle is arranged on the limit clamping ring, the limit clamping ring is positioned in a hole of the limit shaft sleeve, and the limit clamping ring is fixedly connected with the fixed ratchet wheel through the elastic buckle and limits the limit shaft sleeve.
The piston also comprises a piston piece which is fixedly connected with the end part of the screw rod.
The end part of the spiral ratchet is provided with an elastic ratchet, a fixed tooth slot is arranged in an inner hole of the fixed ratchet, and the elastic ratchet of the spiral ratchet stretches into the inner hole of the fixed ratchet and is matched with the fixed tooth slot.
The pitch of the second spiral groove at the periphery of the dose adjusting knob is larger than that of the spiral line clamping groove at the periphery of the spiral sleeve.
The cartridge bin is in threaded connection with the end part of the upper shell of the main body.
After the structure is adopted, the spiral sleeve is driven to rotate by rotating the dose adjusting knob, so that the screw is driven to perform linear motion, the piston sheet is pushed to enter the medicine bottle in the medicine cartridge bin, and the piston at the lower end part of the medicine bottle is propped against for injection, so that the spiral motion is converted into linear motion, and the injection is labor-saving. The invention adopts a spiral progressive mode to register, the spiral motion is converted into the linear motion of the screw rod, the linear pushing progress of the screw rod can be measured through the screw pitch of the screw rod, and when the dose adjusting knob is rotated, the linear pushing of the screw rod only moves a small distance, so that the high-precision injection can be realized.
Drawings
FIG. 1 is a cross-sectional view of the structure of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a perspective view of the dose knob of FIG. 2;
FIG. 4 is a perspective view of the spiral ratchet of FIG. 2;
FIG. 5 is an exploded perspective view of the fixed ratchet assembly of FIG. 2;
fig. 6 is a perspective view of the reset knob of fig. 2.
Detailed Description
The invention is described in further detail below with reference to examples given in the accompanying drawings.
Referring to fig. 1-6, a high-precision pen type injector comprises an injection button 1, a dose adjusting knob 2, a clutch ratchet 3, a clutch spring 4, a spiral sleeve 5, a screw rod 6, a spiral ratchet 7, a fixed ratchet assembly 8, a main body upper shell 9, a reset knob 10, a reset spring 11, a cartridge bin 12 and a dose display sleeve 13, wherein the dose display sleeve 13 is fixed in a hole of the main body upper shell 9, an inner hole of the dose display sleeve 13 is provided with a first spiral groove 131, a second spiral groove 21 is arranged on the periphery of the dose adjusting knob 2, and the first spiral groove 131 is matched with the second spiral groove 21. When the dose adjusting knob 2 is rotated, the dose adjusting knob 2 can be lifted up through two spiral grooves, the inner wall of the first inner hole 211 of the dose adjusting knob 2 is provided with a bayonet and first meshing teeth which are axially arranged, the spiral sleeve 5 is limited in the hole of the main body upper shell 9 in a sliding way up and down through the fixed ratchet wheel component 8, the periphery of the spiral sleeve 5 is provided with a spiral line clamping groove 51, the spiral line clamping groove 51 is in threaded connection with the bayonet, the clutch ratchet 3 is positioned in the first inner hole 211 of the dose adjusting knob 2 and is provided with second meshing teeth 31 which are matched with the first meshing teeth and are axially arranged, the injection button 1 is clamped with the end part of the clutch ratchet 3, the inner wall of the second inner hole 311 of the clutch ratchet 3 is provided with an axial positioning groove 32, the periphery of the spiral ratchet 7 is provided with an axial positioning protrusion 71, the spiral ratchet 7 stretches into the second inner hole 311, the axial positioning bulge 71 is matched with the axial positioning groove 32, one end of the clutch spring 4 is propped against the step 24 stretching out of the inner wall of the first inner hole 211 of the dose adjusting knob 2, the other end of the clutch spring is propped against the clutch ratchet 3, the inner hole of the spiral ratchet 7 is a threaded hole, the screw 6 is in threaded connection with the threaded hole of the spiral ratchet 7, the screw 6 is provided with a matching plane 61, the reset knob 10 is provided with a flat reset knob hole 101 matched with the screw 6, the reset knob 10 is arranged on the screw 6 through the reset knob hole 101, the end surface of the reset knob 10 is provided with a second one-way ratchet 102, the fixed ratchet assembly 8 is provided with a first one-way ratchet 81 matched with the second one-way ratchet 102, one end of the reset spring 11 is propped against the reset knob 10, the other end of the reset spring 11 is propped against the fixed ratchet assembly 8, the cartridge bin 12 is fixedly connected with the end part of the main body upper shell 9.
Referring to fig. 2, the end of the main body upper shell 9 is provided with a notch 91, the dose display sleeve 13 is provided with a transparent display window 132, the transparent display window 132 is positioned at the notch 91 of the main body upper shell 9, and the second spiral groove 21 of the dose knob 2 is provided with a spiral scale bar 25. During injection, the spiral scale bar 25 can be observed through the transparent display window 132, and the injection dosage can be grasped in real time.
Referring to fig. 1, 2 and 5, the fixed ratchet assembly 8 includes a limiting collar 82, a limiting shaft sleeve 83 and a fixed ratchet 84, an elastic buckle 821 is provided on the limiting collar 82, the limiting collar 82 is located in a hole of the limiting shaft sleeve 83, and the limiting collar 82 is fixedly connected with the fixed ratchet 84 through the elastic buckle 821 and limits the limiting shaft sleeve 83.
Referring to fig. 2, the piston plate 14 is further included, and the piston plate 14 is fixedly connected with the end of the screw 6. The piston 14 is more stable when pushing the end of the vial.
Referring to fig. 2, an elastic ratchet 72 is disposed at the end of the spiral ratchet 7, a fixing tooth slot 841 is disposed in the inner hole of the fixing ratchet 84, and the elastic ratchet 72 of the spiral ratchet 7 extends into the inner hole of the fixing ratchet 84 and is matched with the fixing tooth slot 841. The elastic ratchet 72 of the spiral ratchet 7 rotates one turn during injection, and can give out a sound prompt of 'click'.
Referring to fig. 2, the pitch of the second helical groove 21 on the outer circumference of the dose knob 2 is larger than the helical thread clamping groove 51 on the outer circumference of the helical sleeve 5.
Referring to fig. 2, the cartridge housing 12 is threadedly coupled to the end of the main body upper case 9. The medicine silo 12 is convenient to detach and mount the medicine bottle.
The injection button 1 is combined with the buckle, can rotate and can not slide mutually; the periphery of the clutch ratchet wheel 3 is provided with a second meshing tooth 31, and the dose adjusting knob 2 is matched with the first meshing tooth; at ordinary times, under the action of the clutch spring 4, the tooth shapes of the two parts are completely matched, so that synchronous rotation together is ensured. The second helical groove 21 of the part dose knob 2 is relatively large, denoted Pw; the spiral wire clamping groove 51 at the periphery of the spiral sleeve 5 is relatively small and is denoted as Pn; the difference is noted as Δp=pw-Pn.
When injection is needed, the medicine bottle 15 is put into the medicine cartridge 12, the medicine cartridge 12 is connected with the main body upper shell 9 by screw threads, the medicine bottle 15 props against the reset knob 10, the second one-way ratchet 102 is matched with the first one-way ratchet 81, so that the injection state is entered, and when the dose adjusting knob 2 is rotated, the spiral sleeve 5 can be linearly moved for a certain distance due to the difference of internal and external screw pitches; the distance between the spiral sleeve 5 and the spiral ratchet 7 and the upward movement of the screw 6 is deltaP according to one turn of the rotation instruction; at the moment, the clutch ratchet 3 drives the spiral ratchet 7 to rotate for one circle, and the screw 6 can not rotate due to the fixed axial position, so that the screw 6 advances downwards by the same delta P according to the screw thread transmission principle and through reasonable calculation; the axial position of the screw 6 and its end-fitted piston plate 14 is thus unchanged; when the injection button is pressed, the tooth profile of the clutch ratchet 3 cooperating with the rotary dose knob 2 is in a disengaged state, where the rotary dose knob 2 is rotated one turn along the spiral, for the same reason the spiral sleeve 5 is pushed down a distance Δp. Eventually bringing to the piston plate 14 also advances a stroke deltap to complete the injection.
The adjustment is accurate and clear, 0.005mL of the minimum design unit is continuously carried out one by one, each grid has obvious 'click' sound, and the hand feeling is obvious;
during injection, only two large-pitch screws are matched with rotary motion, and the rest of the screws slide linearly, so that the transmission is smooth and stable; the noise is low, and the hand feeling is good.
When the dosage is regulated, when the residual quantity of the liquid medicine is smaller than the maximum injection dosage (30 units), the regulated dosage is effectively controlled; when the last residual liquid medicine is smaller than 30 units, the maximum regulating dosage is equal to the residual liquid medicine dosage, so that a user can clearly know the last actual injection quantity.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and improvements could be made by those skilled in the art without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. A high precision pen injector, characterized in that: comprises an injection button (1), a dose adjusting knob (2), a clutch ratchet (3), a clutch spring (4), a spiral sleeve (5), a screw (6), a spiral ratchet (7), a fixed ratchet assembly (8), a main body upper shell (9), a reset knob (10), a reset spring (11), a cartridge bin (12) and a dose display sleeve (13), wherein the dose display sleeve (13) is fixed in a hole of the main body upper shell (9), an inner hole of the dose display sleeve (13) is provided with a first spiral groove (131), the periphery of the dose adjusting knob (2) is provided with a second spiral groove (21), the first spiral groove (131) is matched with the second spiral groove (21), a first inner hole (211) of the dose adjusting knob (2) is provided with a first meshing tooth which is provided with a bayonet and is axially arranged, the spiral sleeve (5) is limited in the hole of the main body upper shell (9) in a vertical sliding way through the fixed ratchet assembly (8), the periphery of the spiral sleeve (5) is provided with a spiral line card groove (51) which is connected with a screw thread, the dose adjusting knob (2) is positioned in the first inner hole (31) which is meshed with the first meshing tooth (31) which is axially arranged, the injection button (1) is clamped with the end part of the clutch ratchet (3), the inner wall of a second inner hole (311) of the clutch ratchet (3) is provided with an axial positioning groove (32), the periphery of the spiral ratchet (7) is provided with an axial positioning protrusion (71), the spiral ratchet (7) stretches into the second inner hole (311), the axial positioning protrusion (71) is matched with the axial positioning groove (32), one end of the clutch spring (4) is abutted against a step (24) extending out of the inner wall of a first inner hole (211) of the dose adjusting knob (2), the other end is abutted against the clutch ratchet (3), the inner hole of the spiral ratchet (7) is a threaded hole, the screw (6) is in threaded connection with the threaded hole of the spiral ratchet (7), the screw (6) is provided with a matching plane (61), the reset knob (10) is provided with a flat reset knob hole (101) matched with the screw (6), the reset knob (10) is arranged on the screw (6) through the reset knob hole (101), the end surface of the reset knob (10) is provided with a second one-way ratchet component (102), the fixed ratchet component (8) is abutted against the first ratchet component (81) and the other end of the reset knob (8) is fixed with the one-way ratchet component (8), the cartridge bin (12) is fixedly connected with the end part of the main body upper shell (9);
the screw pitch of the second spiral groove (21) at the periphery of the dose adjusting knob (2) is larger than that of the spiral line clamping groove (51) at the periphery of the spiral sleeve (5).
2. The high precision pen injector according to claim 1, wherein: the end of the main body upper shell (9) is provided with a notch (91), the dose display sleeve (13) is provided with a transparent display window (132), the transparent display window (132) is positioned at the notch (91) of the main body upper shell (9), and a spiral scale bar (25) is arranged at the second spiral groove (21) of the dose adjusting knob (2).
3. The high precision pen injector according to claim 1, wherein: the fixed ratchet wheel assembly (8) comprises a limit clamping ring (82), a limit shaft sleeve (83) and a fixed ratchet wheel (84), an elastic buckle (821) is arranged on the limit clamping ring (82), the limit clamping ring (82) is positioned in a hole of the limit shaft sleeve (83), and the limit clamping ring (82) is fixedly connected with the fixed ratchet wheel (84) through the elastic buckle (821) and limits the limit shaft sleeve (83).
4. The high precision pen injector according to claim 1, wherein: the device also comprises a piston sheet (14), and the piston sheet (14) is fixedly connected with the end part of the screw rod (6).
5. A high precision pen injector according to claim 3, wherein: the end part of the spiral ratchet (7) is provided with an elastic ratchet (72), a fixed tooth slot (841) is arranged in an inner hole of the fixed ratchet (84), and the elastic ratchet (72) of the spiral ratchet (7) stretches into the inner hole of the fixed ratchet (84) and is matched with the fixed tooth slot (841).
6. The high precision pen injector according to claim 1, wherein: the cartridge bin (12) is in threaded connection with the end part of the main body upper shell (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021979.0A CN107875487B (en) | 2017-10-27 | 2017-10-27 | High-precision pen type injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021979.0A CN107875487B (en) | 2017-10-27 | 2017-10-27 | High-precision pen type injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107875487A CN107875487A (en) | 2018-04-06 |
| CN107875487B true CN107875487B (en) | 2024-01-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711021979.0A Active CN107875487B (en) | 2017-10-27 | 2017-10-27 | High-precision pen type injector |
Country Status (1)
| Country | Link |
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| CN (1) | CN107875487B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108607136B (en) * | 2018-05-04 | 2023-12-22 | 上海优米泰医疗科技有限公司 | Quantitative injection pen with hidden injection needle |
| CN110141728B (en) * | 2019-05-10 | 2020-12-22 | 江苏德尔福医疗器械有限公司 | Injection pen cap convenient for injection |
| CN110811951B (en) * | 2019-11-30 | 2021-08-03 | 郑州市骨科医院 | Lateral curvature spine and cervical vertebra corrector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101163514A (en) * | 2005-04-24 | 2008-04-16 | 诺和诺德公司 | Injection device |
| GB201615439D0 (en) * | 2016-09-12 | 2016-10-26 | Norton Healthcare Ltd | Dose setting mechanism |
| CN207970312U (en) * | 2017-10-27 | 2018-10-16 | 江苏德尔福医疗器械有限公司 | A kind of high-precision pen-type injector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8647309B2 (en) * | 2008-05-02 | 2014-02-11 | Sanofi-Aventis Deutschland Gmbh | Medication delivery device |
| AR092276A1 (en) * | 2012-08-31 | 2015-04-08 | Sanofi Aventis Deutschland | FARMACOS ADMINISTRATION DEVICE |
-
2017
- 2017-10-27 CN CN201711021979.0A patent/CN107875487B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101163514A (en) * | 2005-04-24 | 2008-04-16 | 诺和诺德公司 | Injection device |
| GB201615439D0 (en) * | 2016-09-12 | 2016-10-26 | Norton Healthcare Ltd | Dose setting mechanism |
| CN207970312U (en) * | 2017-10-27 | 2018-10-16 | 江苏德尔福医疗器械有限公司 | A kind of high-precision pen-type injector |
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| CN107875487A (en) | 2018-04-06 |
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