CN111939384A - Disposable injection pen - Google Patents
Disposable injection pen Download PDFInfo
- Publication number
- CN111939384A CN111939384A CN201910412532.9A CN201910412532A CN111939384A CN 111939384 A CN111939384 A CN 111939384A CN 201910412532 A CN201910412532 A CN 201910412532A CN 111939384 A CN111939384 A CN 111939384A
- Authority
- CN
- China
- Prior art keywords
- pen
- clutch
- injection
- rotating shaft
- screw rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 35
- 239000007924 injection Substances 0.000 title claims abstract description 35
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000001746 injection moulding Methods 0.000 abstract description 3
- 230000007547 defect 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
- 229930192334 Auxin Natural products 0.000 description 1
- 102000004877 Insulin Human genes 0.000 description 1
- 108090001061 Insulin Proteins 0.000 description 1
- 102000014150 Interferons Human genes 0.000 description 1
- 108010050904 Interferons Proteins 0.000 description 1
- 239000002363 auxin Substances 0.000 description 1
- 206010012601 diabetes mellitus Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 208000006454 hepatitis Diseases 0.000 description 1
- 231100000283 hepatitis Toxicity 0.000 description 1
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 description 1
- 229940125396 insulin Drugs 0.000 description 1
- 229940079322 interferon Drugs 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
Images
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
-
- 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
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
- A61M5/31551—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe including axial movement of dose setting member
-
- 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
- A61M5/31566—Means improving security or handling thereof
- A61M5/31568—Means keeping track of the total dose administered, e.g. since the cartridge was inserted
-
- 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
- A61M5/31578—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/27—General characteristics of the apparatus preventing use
- A61M2205/273—General characteristics of the apparatus preventing use preventing reuse, e.g. of disposables
Abstract
The invention discloses a disposable injection pen, which comprises a pen cap, an injection sleeve, a button and a pen body tube, wherein a screw rod, a positioner, a first spring, movable stopping teeth, a transmission toothed bar, the pen body tube, a threaded guide sleeve, a dose knob, a clutch and a rotating shaft are arranged in the pen body tube, the threaded guide sleeve is connected with one end of the pen body tube, the button is connected with one end of the rotating shaft, a second spring is arranged at the joint of the button and the rotating shaft, the other end of the rotating shaft is inserted into the clutch, and the clutch is inserted into the dose knob. The injection pressure for operating a patient is lower, and the pressure of the thrust is mainly controlled by the size of the spring, so that the injection device is easy to design and produce; the pressure of the main thrust of the traditional structure is mainly controlled by the performance of plastic and the tooth shape of the size, the design and adjustment strength is troublesome, and the pressure is influenced by the injection molding process and is not beneficial to production.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a disposable injection pen.
Background
At present, some special patients in clinic, such as diabetes patients, hepatitis patients and the like, need to inject insulin, interferon, auxin, vaccine and the like on different occasions, the requirement on the accuracy of the injection dosage is particularly high, and common patients are inconvenient and cannot effectively achieve accurate medication in the process of using an old disposable syringe; in addition, the existing injector capable of accurately injecting the injection has the defects of high price, complex structure, inconvenient use and the like.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a disposable injection pen, which has lower injection pressure for a patient to operate, and is easy to design and produce because the pressure of thrust is mainly controlled by the size of a spring; the pressure of the main thrust of the traditional structure is mainly controlled by the performance of plastic and the tooth shape of the size, the design and adjustment strength is troublesome, and the pressure is influenced by the injection molding process and is not beneficial to production.
In order to achieve the purpose, the invention adopts the following technical scheme:
a disposable injection pen comprises a pen cap, an injection sleeve, a button and a pen body tube, wherein a screw rod, a positioner, a first spring, a movable stopping tooth, a transmission toothed bar, the pen body tube, a thread guide sleeve, a dose knob, a clutch and a rotating shaft are arranged in the pen body tube, the thread guide sleeve is connected with one end of the pen body tube, the button is connected with one end of the rotating shaft, a second spring is arranged at the joint of the button and the rotating shaft, the other end of the rotating shaft is inserted into the clutch, the clutch is inserted into the dose knob, the dose knob is inserted into the pen body tube, the thread guide sleeve is arranged at the joint of the button and the rotating shaft, the transmission toothed bar is hollow, a fixed stopping tooth capable of freely moving on the transmission toothed bar is arranged at one end of the transmission toothed bar, the other end of the transmission toothed bar penetrates through the clutch and is inserted into the rotating shaft, one end of the screw rod is in the transmission toothed, and the screw rod is sleeved with movable backstop teeth matched with the fixed backstop teeth, the other end of the screw rod penetrates through the positioner and is connected with a piston, and a second spring is sleeved between the positioner and the movable backstop teeth.
Preferably, the movable retaining tooth is freely movable in the axial direction of the screw.
Preferably, the piston is exposed to the barrel for injection propulsion.
Preferably, a locking ring is provided at the connection of the clutch and the dose knob.
Preferably, the injection sleeve is cylindrical with openings at two ends, and protruding blocks are arranged on the opening at one end and the inner surface of the injection sleeve, and are clamped in the positioner.
Preferably, the screw pitch of the screw is 0.5-2 mm, and the thread length is 5-40 mm.
The invention has the following beneficial effects:
1. the injection pressure for the operation of the patient is lower, and the pressure of the thrust force is mainly controlled by the size of the spring, so that the design and the production are easy;
2. the pressure of the main thrust of the traditional structure is mainly controlled by the performance of plastic and the tooth shape of the size, the design and adjustment strength is troublesome, and the pressure is influenced by the injection molding process and is not beneficial to production.
Drawings
FIG. 1 is a schematic diagram of an exploded structure of a disposable injection pen according to the present invention;
in the figure: 1 piston, 2 screw rods, 3 positioners, 4 second springs, 5 movable stopping teeth, 6 fixed stopping teeth, 7 transmission toothed bars, 8 pen barrels, 9 thread guide sleeves, 10 dose knobs, 11 locking rings, 12 clutches, 13 rotating shafts, 14 first springs, 15 buttons, 16 injection sleeves and 17 pen caps.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, the disposable injection pen includes a cap 17, an injection sleeve 16, a button 15 and a pen barrel 8, a screw 2, a locator 3, a first spring 4, a movable stopping tooth 5, a transmission toothed bar 7, the pen barrel 8, a threaded guide sleeve 9, a dose knob 10, a clutch 12 and a rotating shaft 13 are arranged inside the pen barrel 8, the threaded guide sleeve 9 is connected with one end of the pen barrel 8, the button 15 is connected with one end of the rotating shaft 13, a second spring 14 is arranged at the joint of the button 15 and the rotating shaft 13, the other end of the rotating shaft 13 is inserted into the clutch 12, the clutch 12 is inserted into the dose knob 10, a locking ring 11 is arranged at the joint of the clutch 12 and the dose knob 10, the dose knob 10 is inserted into the pen barrel 8, and the threaded guide sleeve 9 is arranged at the joint of the both.
The transmission toothed bar 7 is hollow, one end of the transmission toothed bar is provided with a fixed backstop tooth 6 which can freely move on the transmission toothed bar 7, the other end of the transmission toothed bar passes through a clutch 12 and is inserted into a rotating shaft 13, one end of a screw rod 2 is in threaded connection with the transmission toothed bar 7, a movable backstop tooth 5 matched with the fixed backstop tooth 6 is sleeved on the screw rod 2, the movable backstop tooth 5 can freely move along the axial direction of the screw rod 2, the other end of the screw rod 2 passes through a positioner 3 and is connected with a piston 1, the piston 1 is exposed out of a pen body tube 8 and is used for injection propulsion, and a second spring 4 is sleeved between the positioner 3 and the movable backstop tooth 5 of the screw rod 2.
The injection sleeve 16 is cylindrical with openings at two ends, and a protruding block is arranged on the opening at one end and the inner surface and is clamped in the positioner 3.
In the present invention, when the dose knob 10 is adjusted to the limit position, the clutch 12 is pressed by the first spring 14, the transmission rack bar 7 and the movable anti-back teeth 5 are in the static state due to the anti-tooth resistance of the fixed anti-back teeth 6, the dose knob 10 rotates upwards to contact with the clutch 12, so that the click sound is generated, and the locking ring 11 rises along with the upward rotation of the dose knob 11 (the rising distance is the upward rotation size of the knob).
The transmission rack bar 7 and the movable backstop teeth 5 are blocked by the engagement of the fixed backstop teeth 6, and the acting forces are mutually counteracted, so that no action is taken.
When the button 15 is pressed down for injection, the second spring 4 is pressed due to the downward acting force of the button 15, the stroke is shortened, the clutch 12 is pressed by the first spring 14, the gears are overlapped, at the moment, the locking ring 11, the dose knob 10 and the clutch 12 move together in the downward rotating direction, and when the transmission toothed bar 7 acts along with the downward acting force of the dose knob 10, the fixed stopping teeth 6 and the movable stopping teeth 5 act together, the gears rub to generate sound, and the screw rod 2 is driven to advance forwards. The following is repeated until the dose knob 10 cannot be unscrewed upwards, representing the maximum dose, after the locking ring 11 and the clutch 12 have been locked, and the injection has been completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The disposable injection pen is characterized by comprising a pen cap (17), an injection sleeve (16), a button (15) and a pen barrel (8), wherein a screw rod (2), a positioner (3), a first spring (4), movable stopping teeth (5), a transmission toothed bar (7), the pen barrel (8), a threaded guide sleeve (9), a dosage knob (10), a clutch (12) and a rotating shaft (13) are arranged inside the pen barrel (8), the threaded guide sleeve (9) is connected with one end of the pen barrel (8), the button (15) is connected with one end of the rotating shaft (13), a second spring (14) is arranged at the joint of the two, the other end of the rotating shaft (13) is inserted into the clutch (12), the clutch (12) is inserted into the dosage knob (10), and the dosage knob (10) is inserted into the pen barrel (8), and screw thread guide pin bushing (9) set up in junction between them, transmission ratch (7) are the cavity form, are provided with fixed stopping tooth (6) that can freely remove on transmission ratch (7) in its one end, and the other end passes clutch (12) inserts inside pivot (13), the one end threaded connection of screw rod (2) is in transmission ratch (7), just the cover is equipped with on screw rod (2) and moves back stopping tooth (5) with fixed stopping tooth (6) matched with, the other end of screw rod (2) passes locator (3) and be connected with piston (1), screw rod (2) are located and are equipped with second spring (4) between locator (3) and the activity stopping tooth (5).
2. The disposable injection pen according to claim 1, characterized in that the movable backstop tooth (5) is freely movable in the axial direction of the screw (2).
3. Disposable injection pen according to claim 1, characterized in that the piston (1) is exposed to the pen barrel (8) for injection propulsion.
4. The disposable injection pen according to claim 1, wherein a locking ring (11) is provided at the connection of the clutch (12) and the dose knob (10).
5. The disposable injection pen according to claim 1, wherein the injection sleeve (16) is cylindrical with openings at both ends, and a protruding block is arranged on the opening at one end and the inner surface of the injection sleeve, and the protruding block is clamped in the positioner (3).
6. The disposable injection pen according to claim 1, wherein the screw (2) has a pitch of 0.5 to 2mm and a thread length of 5 to 40 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412532.9A CN111939384A (en) | 2019-05-17 | 2019-05-17 | Disposable injection pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412532.9A CN111939384A (en) | 2019-05-17 | 2019-05-17 | Disposable injection pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111939384A true CN111939384A (en) | 2020-11-17 |
Family
ID=73336142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910412532.9A Pending CN111939384A (en) | 2019-05-17 | 2019-05-17 | Disposable injection pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111939384A (en) |
-
2019
- 2019-05-17 CN CN201910412532.9A patent/CN111939384A/en active Pending
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |