CN106983931A - A kind of injection pen - Google Patents
A kind of injection pen Download PDFInfo
- Publication number
- CN106983931A CN106983931A CN201710318455.1A CN201710318455A CN106983931A CN 106983931 A CN106983931 A CN 106983931A CN 201710318455 A CN201710318455 A CN 201710318455A CN 106983931 A CN106983931 A CN 106983931A
- Authority
- CN
- China
- Prior art keywords
- dosage drum
- drive link
- pen
- pen container
- injection
- 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
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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
- A61M5/31533—Dosing mechanisms, i.e. setting 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
- A61M5/31533—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
-
- 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
- A61M5/31573—Accuracy improving means
-
- 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
- A61M2005/2006—Having specific accessories
-
- 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
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 discloses a kind of injection pen, including pen container, the leading section of the pen container is provided with medicine storehouse, the rearward end of the pen container is provided with trigger, the inside of the pen container is sequentially coaxially provided with dosage drum from outer to inner, differential bar and drive link, the drive link is connected with the differential bar keyway, the pen container inwall has the spacing preiection coordinated with the drive link, the leading section of the dosage drum is provided with transmission clutch, the rearward end of the transmission clutch has latch, there is the internal ring gear that adaptation is engaged with the latch on the drive link, it can be connected between the transmission clutch and the dosage drum single-direction transmission；The leading section of the dosage drum is additionally provided with ram seat, and the front portion of the ram seat is provided with push jack, and the ram seat internal whorl is ordinatedly coaxially arranged with the push rod coordinated with push jack, can be connected between the ram seat and the drive link single-direction transmission.The easy to operation and administration controllable precise of the injection pen.
Description
Technical field
The present invention relates to medical apparatus and instruments technical field, more particularly to a kind of injection pen.
Background technology
Injection pen is a kind of medicine equipment being widely used in clinical treatment, for medicament injection.
Drug injection mainly uses disposable sterilized injector in the market, but its injection process needs to carry out hospital just
Examine and operated by professional and injected, the inapplicable self-management with most of chronic disease patients of simple operation.State
Field and the directions such as Needleless injection, automatic injection, electron injection pen and purely mechanic injection pen being directed to inside and outside major company, still more
These schemes have very big defect, and reliability is low, and cost is high, or even long-term use skin has damage.Current purely mechanic injection
Security reliability is optimal in screw drive of the pen in the accurate assigning process of medicine is realized, clutch transmission, the structure such as touch feedback.
But to there is injection process complex steps, resistance mostly larger for existing machinery formula injection pen product, patient's operation inconvenience, and because
Its part is more complicated, and the probability that injection dosage has deviation is larger, in addition patient it is how older, it is handicapped need
Setting metering easy to identify shows structure and prompting.
Therefore, how to provide a kind of easy to operation and administration controllable precise injection pen is those skilled in the art's mesh
The preceding important technological problems for needing to solve.
The content of the invention
It is an object of the invention to provide a kind of injection pen, the easy to operation and administration controllable precise of the injection pen.
In order to solve the above technical problems, the present invention provides a kind of injection pen, including pen container, the leading section of the pen container is set
There is medicine storehouse, the rearward end of the pen container is provided with trigger, and the inside of the pen container is sequentially coaxially provided with dosage from outer to inner
Cylinder, differential bar and drive link, the drive link are connected with the differential bar keyway, and the pen container inwall has and the drive link
The spacing preiection of cooperation, the leading section of the dosage drum is provided with transmission clutch, and the rearward end of the transmission clutch has
There is the internal ring gear that adaptation is engaged with the latch, between the transmission clutch and the dosage drum on latch, the drive link
It can be connected single-direction transmission；
The leading section of the dosage drum is additionally provided with ram seat, and the front portion of the ram seat is provided with push jack, the push rod
Seat internal whorl is ordinatedly coaxially arranged with the push rod coordinated with push jack, can single-direction transmission between the ram seat and the drive link
Ground is connected.
Preferably, the spacing ring coordinated with the differential bar screw thread is connected with the dosage drum.
Preferably, there is floor, the rearward end of the transmission clutch has to be contacted with the floor on the differential bar
The soft type structural member coordinated.
Preferably, it is provided with the ram seat on ratchet, the drive link and engages adaptation with the ratchet with some
The first unidirectional ratchet.
Preferably, the inwall of the leading section of the outer wall of the leading section of the transmission clutch and the dosage drum is set respectively
It is equipped with the second unidirectional ratchet of intermeshing adaptation.
Preferably, the leading section of the dosage drum is provided with the drive sleeve coordinated with the transmission clutch, and described dose
Graduated cylinder and the transmission clutch can be connected single-direction transmission with the drive sleeve respectively.
Preferably, the rearward end of the pen container is provided with the support linked with the dosage drum, and the trigger is arranged at
On the support.
Preferably, the trigger is button.
Preferably, the front end of the pen container is removably provided with is set with the cap for brush coordinated with the medicine storehouse.
Relatively above-mentioned background technology, injection pen provided by the present invention, during its use, by rotating forward dosage
Cylinder, and being coordinated by transmission between each driving member such as transmission clutch, differential bar and drive link so that dosage drum and pen container to
Trigger is moved at one end, so as to realize the setting before injection to drug dose；During subsequent operation, dosage is reversely rotated
Cylinder, due to the presence of each single-direction transmission structure so that dosage drum is moved at one end to medicine storehouse, to complete returning for drug dose
Adjust；During injection, squeezing trigger, now dosage drum be linked with trigger and move and reversely revolved at one end to medicine storehouse
Turn, simultaneously because the presence of each one-way driving mechanism causes push rod to be rotate in same direction with dosage drum, by pushing away while push rod is rotated
Thread matching structure between pole socket inwall and push rod outer wall causes push rod formation to move axially and drives push jack to where medicine storehouse one
End movement, so as to complete injection operation, the counterpart such as dosage drum, differential bar and trigger is repositioned in pen container after the completion of injection.
The operating process of the injection pen is simple and easy to do, and operation resistance is smaller, each transmission component flexibility and reliability, and drug dose control essence
Degree is higher, and medication is precisely controllable.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
The Structure explosion diagram for the injection pen that Fig. 1 is provided by a kind of embodiment of the invention；
Fig. 2 is Fig. 1 agent structure assembling schematic diagram；
Fig. 3 be Fig. 2 in A-A to structure sectional view；
Fig. 4 is the structure sectional view of B-B direction in Fig. 2；
Fig. 5 be Fig. 2 in C-C to structure sectional view；
Fig. 6 be Fig. 2 in D-D to structure sectional view；
Fig. 7 be Fig. 2 in E-E to structure sectional view；
The Structure explosion diagram for the injection pen that Fig. 8 is provided by another embodiment of the invention.
Embodiment
The core of the present invention is to provide a kind of injection pen, the easy to operation and administration controllable precise of the injection pen.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
It refer to Fig. 1 to Fig. 7, the Structure explosion diagram for the injection pen that Fig. 1 is provided by a kind of embodiment of the invention；
Fig. 2 is Fig. 1 agent structure assembling schematic diagram；Fig. 3 be Fig. 2 in A-A to structure sectional view；Fig. 4 is the knot of B-B direction in Fig. 2
Structure sectional view；Fig. 5 be Fig. 2 in C-C to structure sectional view；Fig. 6 be Fig. 2 in D-D to structure sectional view；Fig. 7 is E- in Fig. 2
E to structure sectional view.
In a specific embodiment, injection pen provided by the present invention, it includes pen container 6, and the leading section of pen container 6 is provided with
Medicine storehouse 13, the rearward end of pen container 6 is provided with trigger 1, and the inside of pen container 6 is sequentially coaxially provided with dosage drum 3 from outer to inner, poor
Fast bar 5 and drive link 10, drive link 10 are connected with the keyway of differential bar 5, and the inwall of pen container 6 has the limit convex coordinated with drive link 10
Rise, the leading section of dosage drum 3 is provided with transmission clutch 8, and the rearward end of transmission clutch 8 has latch (not shown),
There is the internal ring gear (not shown) that adaptation is engaged with latch on drive link 5, can be unidirectional between transmission clutch 8 and dosage drum 3
Drivingly it is connected；The leading section of dosage drum 3 is additionally provided with ram seat 9, and the front portion of ram seat 9 is provided with push jack 11, ram seat 9
Internal whorl is ordinatedly coaxially arranged with the push rod 4 coordinated with push jack 11, can single-direction transmission ground phase between ram seat 9 and drive link 10
Linkage.
During use, by rotating forward dosage drum 3, and pass through transmission clutch 8, differential bar 5 and drive link 10 etc.
Transmission between each driving member coordinates so that dosage drum 3 and pen container 6 are moved at one end to trigger 1, so as to realize before injection
Setting to drug dose；During subsequent operation, dosage drum 3 is reversely rotated, due to the presence of each single-direction transmission structure so that
Dosage drum 3 is moved at one end to medicine storehouse 13, to complete the readjustment of drug dose；During injection, squeezing trigger 1, now dosage
Cylinder 3 is linked with trigger 1 and moves and reversely rotate at one end to medicine storehouse 13, simultaneously because each one-way driving mechanism
In the presence of causing push rod 4 to be rotate in same direction with dosage drum 3, by between the inwall of ram seat 9 and the outer wall of push rod 4 while push rod 4 is rotated
Thread matching structure causes the formation of push rod 4 to move axially and drive push jack 11 to be moved at one end to medicine storehouse 13, so as to complete note
The counterpart such as dosage drum 3, differential bar 5 and trigger 1 after the completion of operation, injection is penetrated to be repositioned in pen container 6.The behaviour of the injection pen
Make process simple and easy to do, operation resistance is smaller, each transmission component flexibility and reliability, and drug dose control accuracy is higher, medication essence
It will definitely control.
Further, the spacing ring 7 coordinated with the screw thread of differential bar 5 is connected with dosage drum 3.In practical operation, dosage drum 3
With the clamping of spacing ring 7, it is impossible to relatively rotate, can only move to axial, the reality of the position-limiting action of spacing ring 7 during three
It is existing：
A. during setting metering, dosage drum 3 is rotated forward, and drives spacing ring 7 to rotate forward, differential bar 5 is not rotated, spacing ring
7 are threadedly coupled with differential bar 5, form relative displacement backward；
B. during metering readjustment, dosage drum 3 is rotated backward, and drives spacing ring 7 to rotate backward, and is moved forward, and differential bar 5 is not
Rotate, spacing ring 7 is relatively rotated with differential bar 5, produce axial displacement forward；
When c. injecting, dosage drum 3 and differential bar 5 are all rotated backward, also synchronous forward axial displacement, spacing ring 7 and dosage
Cylinder 3 is not relatively rotated, and is not also relatively rotated with differential bar 5, and spacing ring 7 does not produce axial relative displacement with differential bar 5.
Displacement of the spacing ring 7 according to the generation of the dosage of regulation relative to differential bar 5 backward when realizing regulating dosage, during injection
Spacing ring 7 and differential bar 5 do not produce relative displacement, spacing ring 7 relative to differential bar 5 after per injection always than it is upper once
After injection more backward, after pre-filled medicine has been used, spacing ring 7 arrives the rearmost end of differential bar 5, is blocked by the left end of support 2, it is impossible to
Used again, so as to realize the disposable of injection pen.
More specifically, have floor on differential bar 5, the rearward end of transmission clutch 8 have with floor be engaged it is soft
Type structural member.In operating process, the soft type structural member can be engaged with floor and send specific sound, so as to operator
Member forms auditory cues, and then realizes the non-vision prompting during drug dose setting, further improves the injection pen
Ease of use.
In addition, being provided with ratchet in ram seat 9, there are some the first unidirectional spine that adaptation is engaged with ratchet on drive link 10
Tooth.The stable transmission for the one-way driving mechanism that this kind of ratchet and the first unidirectional ratchet are constituted is reliable, and is favorably improved ram seat 9
Transmission efficiency and performance accuracy between drive link 10.
On the other hand, the inwall of the leading section of the outer wall of the leading section of transmission clutch 8 and dosage drum 3 is respectively arranged with
It is intermeshed the second unidirectional ratchet of adaptation.The transmission mechanism that this kind is directly mediated by the second unidirectional ratchet helps to simplify described
The black box quantity of injection pen, optimizes its assembling structure, and equipment cost is accordingly reduced.
It refer to Fig. 8, the Structure explosion diagram for the injection pen that Fig. 8 is provided by another embodiment of the invention.
In addition, the leading section of dosage drum 3 is provided with the drive sleeve 20 coordinated with transmission clutch 8, and dosage drum 3 and transmission
Clutch 8 can be connected single-direction transmission with drive sleeve 20 respectively.Dosage drum 3 can further be optimized by setting up after the drive sleeve 20
With the drive mechanism between transmission clutch 8, it is ensured that drive control precision and stability between dosage drum 3 and transmission clutch 8.
It should be pointed out that specific in practical application, the cooperation between above-mentioned dosage drum 3, drive sleeve 20 and transmission clutch 8
Structure can use single direction ratchet engaging mechanism as previously described, it would however also be possible to employ other can realize the machinery of single-direction transmission
Structure, in principle, as long as it disclosure satisfy that the actual use needs of the injection pen.
Please continue to refer to Fig. 1 to Fig. 7.The rearward end of pen container 6 is provided with the support 2 linked with dosage drum 3, and trigger 1 is set
It is placed on support 2.The support 2 can provide certain structure support for trigger 1, and ensure between trigger 1 and dosage drum 3
Transmission efficiency and structural reliability.
Further, trigger 1 is button.The exquisiteness simple in construction of this kind of button, can effectively optimize the whole of injection pen
Structure is made in gymnastics.Certainly, the trigger 1 is that button is only that its in preferred scheme, practical application can also be other behaviour such as push rod
Vertical part, in principle, as long as it disclosure satisfy that the actual use needs of the injection pen.
More specifically, the front end of pen container 6 is removably provided with is set with the cap for brush 12 coordinated with medicine storehouse 13.The energy of the cap for brush 12
Front body structure enough for medicine storehouse 13 and pen container 6 provides reliable structural defence, it is to avoid the principal functional components of injection pen are received
To structural damage, and non-working condition lower outer portion environment is avoided to produce pollution or other unfavorable shadows to the intraware of injection pen
Ring.
For ease of understanding plan content, appropriate elaboration is done to application scheme with reference to practical operation flow.
When implementing dosage setting, dosage drum 3 is rotated forward, the unidirectional ratchet of dosage drum 3 acts on the front end of transmission clutch 8
On second unidirectional ratchet, transmission clutch 8 does not rotate, produce to trigger (i.e. rear end) at one end axial displacement, transmission
Differential bar 5, support 2 and trigger 1 are withstood also displacement axially rearward, drive link 10 and differential to clutch 8 by displacement axially rearward
The keyway arrangements of bar 5 are connected, but ram seat 9 is blocked and can not be moved rearwards by by the inwall projection of pen container 6, the flexible spine of the front end of drive link 10
Wheel is relatively fixed with ram seat 9, therefore flexible ratchet can not be moved forward and backward, the rear end of transmission clutch 8 for flexible structural member not
Differential bar 5 can be driven to rotate, differential bar 5 does not turn, transmission clutch 8 does not also rotate, the second unidirectional ratchet of transmission clutch 8 with
The effect of the unidirectional ratchet of dosage drum 3 produces audible indication, while dosage drum 3 and trigger 1, support 2 and differential bar 5 are together to the back-end
Pen container 6 is ejected, metering setting is completed.
When implementing dosage readjustment, dosage drum 3 is reversely rotated, the unidirectional ratchet of dosage drum 3 drives transmission clutch 8 to rotate, medicine
Thing container or drug injection need injection force to the reaction force of push jack 11 and push rod 4 for balancing out during readjustment dosage, transmission
Frictional force is reversely rotated between the rear end flexible structural member of clutch 8 and the floor of differential bar 5.Drive link 10 connects with the keyway of differential bar 5
Connecing to be relatively rotated, and drive link 10 is not also rotated, and ram seat 9 will not be driven to rotate, so that push rod 4 produces position axially forward
Move, be cancelled completely.Dosage drum 3 is moved axially forward, and band flip-flop 1, support 2, differential bar 5 moves forward, and realizes readjustment dosage,
Transmission clutch 8 is rotated, and audible indication is produced with the floor of differential bar 5.
During implement injection, by flip-flop 1, dosage drum 3 is pressed moved axially forward, is rotated backward, dosage drum 3
Unidirectional ratchet drive transmission clutch 8 rotate, the unidirectional ratchet that at this moment clutch 8 coordinates with differential bar 5 can not be driven, but be entered
Row pressing so that the raised ratchet of top surface 4 of transmission clutch 8 is engaged with the circle ratchet in differential bar 5, so as to realize dosage
Cylinder 3 can drive transmission clutch 8 also to rotate backward, and drive differential bar 5 to rotate backward, cause drive link 10 to rotate, drive link
10 ratchets are engaged with the unidirectional ratchet of ram seat 9, and now push rod 4 is also rotated backward, while between the inwall of ram seat 9 and the outer wall of push rod 4
Thread matching structure drive the axial advancement of push rod 4, withstand push jack 11 and injected, inject post dose tins 3 and trigger 1,
Support 2, differential bar 5 is returned in pen container 6.
In summary, the injection pen provided in the present invention, including pen container, the leading section of the pen container is provided with medicine storehouse, institute
The rearward end for stating pen container is provided with trigger, and the inside of the pen container is sequentially coaxially provided with dosage drum, differential bar from outer to inner
And drive link, the drive link is connected with the differential bar keyway, and the pen container inwall has the limit coordinated with the drive link
Position is raised, and the leading section of the dosage drum is provided with transmission clutch, and the rearward end of the transmission clutch has latch, described
There is the internal ring gear that adaptation is engaged with the latch on drive link, can single-direction transmission between the transmission clutch and the dosage drum
Ground is connected；The leading section of the dosage drum is additionally provided with ram seat, and the front portion of the ram seat is provided with push jack, the push rod
Seat internal whorl is ordinatedly coaxially arranged with the push rod coordinated with push jack, can single-direction transmission between the ram seat and the drive link
Ground is connected.During use, by rotating forward dosage drum, and by transmission clutch, differential bar and drive link etc. each
Transmission between driving member coordinates so that dosage drum and pen container are moved at one end to trigger, so as to realize before injection to medicine
The setting of dosage；During subsequent operation, dosage drum is reversely rotated, due to the presence of each single-direction transmission structure so that dosage drum
Moved at one end to medicine storehouse, to complete the readjustment of drug dose；During injection, squeezing trigger, now dosage drum and trigger
Be linked and move and reversely rotate at one end to medicine storehouse, simultaneously because the presence of each one-way driving mechanism cause push rod with
Dosage drum rotates in same direction, and push rod causes push rod while rotation by the thread matching structure between ram seat inwall and push rod outer wall
Formed and move axially and drive push jack to be moved at one end to medicine storehouse, so that injection operation is completed, dosage drum, difference after the completion of injection
The counterparts such as fast bar and trigger are repositioned in pen container.The operating process of the injection pen is simple and easy to do, and operation resistance is smaller, respectively
Transmission component flexibility and reliability, and drug dose control accuracy is higher, medication is precisely controllable.
Injection pen provided by the present invention is described in detail above.Specific case used herein is to the present invention
Principle and embodiment be set forth, the explanation of above example is only intended to help to understand the method and its core of the present invention
Thought is thought.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention,
Some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the protection domain of the claims in the present invention
It is interior.
Claims (9)
1. a kind of injection pen, it is characterised in that：Including pen container, the leading section of the pen container is provided with after medicine storehouse, the pen container
End is provided with trigger, and the inside of the pen container is sequentially coaxially provided with dosage drum, differential bar and drive link, institute from outer to inner
State drive link to be connected with the differential bar keyway, the pen container inwall has the spacing preiection coordinated with the drive link, described
The leading section of dosage drum is provided with transmission clutch, and the rearward end of the transmission clutch, which has on latch, the drive link, to be had
There is the internal ring gear that adaptation is engaged with the latch, can be connected between the transmission clutch and the dosage drum single-direction transmission；
The leading section of the dosage drum is additionally provided with ram seat, and the front portion of the ram seat is provided with push jack, the ram seat
Portion's screw thread is ordinatedly coaxially arranged with the push rod coordinated with push jack, can single-direction transmission ground phase between the ram seat and the drive link
Linkage.
2. injection pen as claimed in claim 1, it is characterised in that：It is connected with and matches somebody with somebody with the differential bar screw thread in the dosage drum
The spacing ring of conjunction.
3. injection pen as claimed in claim 1, it is characterised in that：There is floor, the transmission clutch on the differential bar
Rearward end there is the soft type structural member that is engaged with the floor.
4. injection pen as claimed in claim 1, it is characterised in that：It is provided with the ram seat on ratchet, the drive link
With some the first unidirectional ratchets that adaptation is engaged with the ratchet.
5. injection pen as claimed in claim 1, it is characterised in that：The outer wall of the leading section of the transmission clutch and described
The inwall of the leading section of dosage drum is respectively arranged with the second unidirectional ratchet of intermeshing adaptation.
6. injection pen as claimed in claim 1, it is characterised in that：The leading section of the dosage drum be provided with it is described be driven from
The drive sleeve that clutch coordinates, and the dosage drum and the transmission clutch can be connected single-direction transmission with the drive sleeve respectively
It is dynamic.
7. injection pen as claimed in claim 1, it is characterised in that：The rearward end of the pen container is provided with to be joined with the dosage drum
Dynamic support, the trigger is arranged on the support.
8. injection pen as claimed in claim 1, it is characterised in that：The trigger is button.
9. injection pen as claimed in claim 1, it is characterised in that：The front end of the pen container is removably provided with and the medicine
The cap for brush that storehouse suit coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710318455.1A CN106983931A (en) | 2017-05-08 | 2017-05-08 | A kind of injection pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710318455.1A CN106983931A (en) | 2017-05-08 | 2017-05-08 | A kind of injection pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106983931A true CN106983931A (en) | 2017-07-28 |
Family
ID=59417598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710318455.1A Pending CN106983931A (en) | 2017-05-08 | 2017-05-08 | A kind of injection pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106983931A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018205409A1 (en) * | 2017-05-08 | 2018-11-15 | 甘肃成纪生物药业有限公司 | Injection pen |
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| WO2018205409A1 (en) * | 2017-05-08 | 2018-11-15 | 甘肃成纪生物药业有限公司 | Injection pen |
| WO2019029123A1 (en) * | 2017-08-08 | 2019-02-14 | 甘肃成纪生物药业有限公司 | Injection pen capable of fine adjustment |
| RU2721930C1 (en) * | 2017-08-08 | 2020-05-25 | Ганьсу Чаньджи Байо-Фармасьютикал Ко., Лтд. | Fine-tunable autoinjector |
| CN109107003A (en) * | 2018-09-13 | 2019-01-01 | 张露 | A kind of novel injection pen |
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| CN109172948A (en) * | 2018-10-16 | 2019-01-11 | 甘肃成纪生物药业有限公司 | A kind of dosage adjusting insurance position-limit mechanism |
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| CN110237365B (en) * | 2019-07-08 | 2024-02-23 | 深圳惠迈智能科技有限公司 | Medical injection device capable of replacing medicine bottle |
| CN110755715A (en) * | 2019-10-28 | 2020-02-07 | 深圳市绿星科技有限公司 | Pre-filled injection pen |
| CN111544706A (en) * | 2020-05-11 | 2020-08-18 | 易舒康(山东)生物科技有限公司 | Accurate portable needleless injector of dosage |
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Application publication date: 20170728 |