CN106039475B - A kind of injection pen - Google Patents
A kind of injection pen Download PDFInfo
- Publication number
- CN106039475B CN106039475B CN201610329296.0A CN201610329296A CN106039475B CN 106039475 B CN106039475 B CN 106039475B CN 201610329296 A CN201610329296 A CN 201610329296A CN 106039475 B CN106039475 B CN 106039475B
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- China
- Prior art keywords
- clutch
- dial drum
- check sleeve
- medicine storehouse
- pen tube
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Classifications
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- 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
-
- 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
- A61M5/31528—Dosing by means of rotational movements, e.g. screw-thread mechanisms
-
- 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
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- 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 present invention provides a kind of injection pens, including dosage adjustment portion and medicine storehouse portion；Medicine storehouse portion includes medicine storehouse shell and the first clutch, and the first clutch includes clutch base, and one end of clutch base and medicine storehouse shell is detachably connected；Dosage adjustment portion includes pen tube, dial drum, check sleeve, return barrel and reverse-flighted screw；One end of pen tube is detachably connected with clutch base；Dial drum is threaded through in pen tube, and dial drum is threadedly coupled with pen tube；Check sleeve is threaded through in dial drum, and the second clutch is provided between the inner wall of dial drum and the upper end of check sleeve, it is provided with the first detent mechanism return barrel between the inner wall of dial drum and the outer wall of check sleeve to be threaded through in check sleeve, and the upper end of return barrel and the upper end of check sleeve are connected together；Third clutch is provided between the lower end of check sleeve and the lower end of return barrel.The present invention realizes the recycling of resource, reduces the purchase cost of user, alleviates the burden of user.
Description
Technical field
The present invention relates to the field of medical instrument technology, more particularly, to a kind of injection pen.
Background technique
Diabetes are one group of metabolic diseases characterized by hyperglycemia.Hyperglycemia be then due to defect of insulin secretion or
Its biological effect is impaired, or both have concurrently and cause.There are many treatment methods of diabetes, including drug therapy, exercise therapy, drink
Food therapy treatment etc..Injection of insulin treatment method in its drug treatment is most common and most effective treatment method, the party
Method needs patient's periodically quantitatively insulin injection.Therefore, injection pen becomes the tool that patient oneself carries out insulin injection.
Injection pen in the prior art includes liquid medicine pipe, coil, clutch pipe, screw rod and nut pipe.One end of screw rod is set
It is equipped with piston, piston is arranged in liquid medicine pipe.The other end of screw rod is threaded through in nut pipe, is arranged clutch pipe outside nut pipe, from
It closes and is arranged coil outside pipe.When needing to adjust injection measurement, coil is rotated, coil drives clutch pipe to prolong axial movement, until institute
Need position.After adjusting, rotating nuts pipe, nut pipe drives screw rod mobile and piston is pushed to be infused in liquid medicine in-pipe
It penetrates.Calibrated shot is carried out when user's per injection by adjusting clutch pipe position.
But injection pen in the prior art, user adjusts scale value by adjusting the position of clutch pipe, when in liquid medicine pipe
Liquid medicine injection after, entire injection pen just cannot re-use, and cannot replace liquid medicine pipe, this not only wastes resource, but also
The purchase cost for increasing user increases the burden of user.
Summary of the invention
The purpose of the present invention is to provide a kind of injection pens, to solve the liquid medicine existing in the prior art when in liquid medicine pipe
After injection, entire injection pen just cannot be re-used, and cannot replace liquid medicine pipe, this not only wastes resource, but also increases
The purchase cost of user, the technical issues of increasing the burden of user.
The present invention provides a kind of injection pens, including dosage adjustment portion and medicine storehouse portion；Medicine storehouse portion is for storing prepackage
There is the flask for medicinal preparations of medicament；The dosage adjustment portion is used to adjust drug dose when injection, and makes the flask for medicinal preparations discharge setting
The medicament of dosage；
Medicine storehouse portion includes medicine storehouse shell and the first clutch, and first clutch includes clutch base, institute
The one end for stating clutch base and medicine storehouse shell is detachably connected；
The dosage adjustment portion includes pen tube, dial drum, check sleeve, return barrel and reverse-flighted screw；The pen tube
One end is detachably connected with the clutch base；
The dial drum is threaded through in the pen tube, and the dial drum is threadedly coupled with the pen tube；
The check sleeve is threaded through in the dial drum, and the upper end of the inner wall of the dial drum and the check sleeve
Between be provided with the second clutch, for enabling the dial drum band when the dial drum is screwed out from the pen tube
Move the check sleeve make rotating motion and far from medicine storehouse shell axial movement；
It is provided with the first detent mechanism between the inner wall of the dial drum and the outer wall of the check sleeve, it is described for making
Check sleeve does unidirectional rotary motion；
The return barrel is threaded through in the check sleeve, and the upper end of the return barrel and the check sleeve
Upper end is connected together；
It is provided with third clutch between the lower end of the check sleeve and the lower end of the return barrel, for working as institute
When stating the dial drum screw-in pen tube, the check sleeve and the return barrel is made to do the axial fortune close to medicine storehouse shell
It is dynamic；
The reverse-flighted screw is threaded through in the return barrel, and the reverse-flighted screw includes upper semisection and lower semisection, described
Upper semisection is threadedly coupled with the return barrel.
Further, first clutch further includes feed gear wheel and clutch gear；The feed gear wheel and described
Clutch gear is fastened in the clutch base, and the feed gear wheel can be meshed with the clutch gear；It is described from
Closing gear can be along the axial movement of the clutch base；The feed gear wheel is set on the lower semisection, and the feeding
Gear is threadedly coupled with the lower semisection.
Further, the upper semisection have the first screw thread, the lower semisection have the second screw thread, first screw thread with
The thread rotary orientation of second screw thread is opposite.
Further, second clutch includes multiple first be arranged on the inner wall of the upper end of the dial drum
Index tooth, and be arranged in the check sleeve upper end it is multiple second indexing teeth, it is described first indexing tooth be used for it is described
Second indexing tooth is meshed.
Further, the upper end of the check sleeve is provided with clutch knob, when the pulling clutch knob does it far
When axial movement from medicine storehouse shell, the clutch knob is able to drive the check sleeve and does far from medicine storehouse shell
Axial movement so that on the check sleeve second indexing tooth on the dial drum it is described first index tooth mutually nibble
It closes.
Further, the upper end of the check sleeve is provided with multiple limit pawls, and multiple limit pawls form limit
Bit space；The clutch knob has button lid and button axis, and the button axis is fixed on the lower end surface of button lid, and the button axis is fastened on institute
It states in limit space, and there is setting axial spacing between the button axis and the limit pawl.
Further, the upper end of the dial drum is fixed with active knob, and dial drum described in the active knob engages
Connection；
The upper surface of the active knob offers first through hole, and the button axis is threaded through in the first through hole.
Further, first detent mechanism includes the pawl that the outer surface of the check sleeve is arranged in, Yi Jishe
Multiple ratchets on the inner wall of the dial drum are set, multiple ratchets are uniformly distributed along the circumferential direction of the dial drum.
Further, the third clutch include the first spring, second spring, two-sided mesh piece, be set to it is described
The first end face gear of the lower end of check sleeve and be set to the return barrel lower end second end face gear, it is described double
The upper surface of face mesh piece is provided with third face gear, and the lower end surface of the two-sided mesh piece is provided with the 4th face gear；
First spring, the two-sided mesh piece and the second spring are respectively sleeved on the return barrel, wherein described
Two springs are located at the top of the second end face gear, and the two-sided mesh piece is located at the top of the second spring, and described
One spring is located at the top of the two-sided mesh piece, and the first end face gear is located at the top of first spring.
Further, the circumferential direction of the two-sided mesh piece is provided with feather key, and the inner wall of the pen tube is provided with and the cunning
The corresponding keyway of key；The feather key limit is in the keyway, so that the two-sided mesh piece can be along the axis of the pen tube
To movement.
Compared with prior art, the invention has the benefit that
Injection pen provided by the invention, including dosage adjustment portion and medicine storehouse portion；Medicine storehouse portion is preinstalled with medicament for storing
Flask for medicinal preparations；Dosage adjustment portion is used to adjust drug dose when injection, and makes the medicament of flask for medicinal preparations discharge setting dosage；Medicine storehouse portion
Including medicine storehouse shell and the first clutch, the first clutch includes clutch base, one end of clutch base and medicine storehouse shell
It is detachably connected；Dosage adjustment portion includes pen tube, dial drum, check sleeve, return barrel and reverse-flighted screw；One end of pen tube with
Clutch base is detachably connected；Dial drum is threaded through in pen tube, and dial drum is threadedly coupled with pen tube；Check sleeve is threaded through quarter
It spends in cylinder, and is provided with the second clutch between the inner wall of dial drum and the upper end of check sleeve, for working as dial drum from pen
When being screwed out in pipe, make dial drum be able to drive check sleeve make rotating motion and far from medicine storehouse shell axial movement；Dial drum
Inner wall and check sleeve outer wall between be provided with the first detent mechanism, for making check sleeve do unidirectional rotary motion；It returns
Journey barrel is threaded through in check sleeve, and the upper end of return barrel and the upper end of check sleeve are connected together；Under check sleeve
End and the lower end of return barrel between be provided with third clutch, for when dial drum screw in pen tube when, make check sleeve and
Return barrel does the axial movement close to medicine storehouse shell；Reverse-flighted screw is threaded through in return barrel, and reverse-flighted screw includes upper semisection
And lower semisection, upper semisection are threadedly coupled with return barrel.By the way that the first clutch is arranged, after the completion of injection, can be realized
The original state of reverse-flighted screw returning back to before injection, the clutch base of the first clutch, which is detachably connected, realizes flask for medicinal preparations
It is replaceable, to realize the recycling of resource, reduce the purchase cost of user, alleviate the burden of user.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the explosive view of middle dosage of embodiment of the present invention adjustment portion；
Fig. 2 is the explosive view in Chinese medicine of embodiment of the present invention storehouse portion；
Fig. 3 is the cross-sectional view of injection pen provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of pen tube in the embodiment of the present invention；
Fig. 5 is the main view of dial drum in the embodiment of the present invention；
Fig. 6 is the bottom view of dial drum in the embodiment of the present invention；
Fig. 7 is the cross-sectional view of dial drum in the embodiment of the present invention；
Fig. 8 is the structural schematic diagram of check sleeve in the embodiment of the present invention；
Fig. 9 is check sleeve cross-sectional view (main view) in the embodiment of the present invention；
Figure 10 is the bottom view of check sleeve in the embodiment of the present invention；
Figure 11 is the structural schematic diagram of return barrel in the embodiment of the present invention；
Figure 12 is the structural schematic diagram of two-sided mesh piece in the embodiment of the present invention；
Figure 13 is the structural schematic diagram of reverse-flighted screw in the embodiment of the present invention；
Figure 14 is the structural schematic diagram of knurled nut in the embodiment of the present invention；
Figure 15 is the structural schematic diagram of active knob in the embodiment of the present invention；
Figure 16 is the structural schematic diagram of clutch knob in the embodiment of the present invention；
Figure 17 is the structural schematic diagram of clutch base in the embodiment of the present invention；
Figure 18 is the structural schematic diagram of feed gear wheel in the embodiment of the present invention；
Figure 19 is the structural schematic diagram of clutch gear in the embodiment of the present invention；
Figure 20 is the structural schematic diagram of Chinese medicine of embodiment of the present invention storehouse shell；
Figure 21 is the structural schematic diagram of pen cap in the embodiment of the present invention.
Appended drawing reference:
101- medicine storehouse shell；102- clutch base；103- containing mark line；104- visual windows；105- injection needle；
106- pen cap；107- pen cap engages boss；108- vertical portion；109- transverse part；110- pen tube；111- dial drum；112- check
Sleeve；113- return barrel；114- pen tube boss；115- positioning convex platform；116- pen tube locating slot；The limit of 117- annular pen tube
Slot；118- upper semisection；119- lower semisection；120- injection piston；121- rotating block；122- feed gear wheel；123- clutch gear；
124- chuck；The center 125- card hole；The edge 126- card hole；The first card base of 127-；The second card base of 128-；129- sight vane；130-
Transparent scale window；131- dose calibration line；132- first indexes tooth；133- second indexes tooth；134- clutch knob；135- button
Lid；136- button axis；137- limits pawl；139- active knob；140- knob chuck；141- pawl；145- ratchet；146- annular
Sizing boss；147- card slot；148- card column；The first spring of 149-；150- second spring；The two-sided mesh piece of 151-；152- first
Face gear；153- second end face gear；154- third face gear；The 4th face gear of 155-；156- feather key；157- key
Slot；158- positioning ring；159- knurled nut；160- flask for medicinal preparations.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Embodiment
Referring to shown in Fig. 1 to Figure 21, the embodiment of the invention provides a kind of injection pens, including dosage adjustment portion and medicine storehouse
Portion；Medicine storehouse portion is for storing the flask for medicinal preparations for being preinstalled with medicament；Dosage adjustment portion is used to adjust drug dose when injection, and makes medicine
The medicament of setting dosage is discharged in agent bottle, and user can be adjusted the size for wanting injection medicament dosage by dosage adjustment portion, work as adjusting
After complete, then the medicament of setting dosage that makes to regulate by dosage adjustment portion is discharged flask for medicinal preparations and completes injection.
In the embodiment, medicine storehouse portion includes medicine storehouse shell 101 and the first clutch, and the first clutch includes clutch
Seat 102, one end of clutch base and medicine storehouse shell is detachably connected, specifically, flask for medicinal preparations 160 inserts the storage of Chinese medicine storehouse shell
It deposits in chamber；Medicine storehouse shell is cylindrical, and the outer surface of medicine storehouse shell is provided with containing mark line 103, along the axial direction of medicine storehouse shell
There are two visual windows 104, two visual windows are symmetrical arranged by symmetry axis of the axis of medicine storehouse shell for direction setting, by can
Viewing window can see the surplus of flask for medicinal preparations Chinese medicine；The other end of medicine storehouse shell is provided with injection needle 105, the injection needle
Head is detachably connected with medicine storehouse shell, and specific injection needle is connect with medicine storehouse outer casing screw, and the other end of medicine storehouse shell has
Medicine storehouse external screw thread, injection needle have syringe needle internal screw thread corresponding with medicine storehouse external screw thread.The outer surface of medicine storehouse shell is arranged with
Pen cap 106, the outer surface of medicine storehouse shell are provided with pen cap engaging boss 107, and the inner wall of pen cap, which is provided with, engages boss with pen cap
Corresponding broken line type card slot, broken line type card slot have vertical portion 108 and transverse part 109, first enter pen cap engaging boss
Then vertical portion rotates pen cap, so that pen cap engaging boss is entered transverse part, just realize the card for having pen cap Yu medicine storehouse shell in this way
Close connection.In the embodiment, the quantity of pen cap engaging boss and the quantity of broken line type card slot are two, and two pen cap engagings are convex
Platform is symmetrical as symmetry axis using the axis of medicine storehouse shell, and two broken line type card slots are symmetrical axial symmetry point with the axis of pen cap
Cloth；It should be noted that quantity, the quantity of broken line type card slot and their distribution situation of pen cap engaging boss can also bases
Actual conditions determine, such as it is 3 or 4 that pen cap, which engages the quantity of boss and the uniform amount of broken line type card slot,.In addition, can also
So that the quantity of broken line type card slot is greater than the quantity of pen cap engaging boss, such as the quantity of pen cap engaging boss is 2, broken line type
The quantity of card slot is 4,6 or 8, and pen cap engaging boss is screwed in transverse part convenient for fast realize in this way, realizes pen cap and medicine
Storehouse shell is connected together.Clutch base is connect with medicine storehouse outer casing screw, specifically, clutch base has spiral shell in clutch base
Line, medicine storehouse shell have clutch base external screw thread, in the embodiment, clutch base internal screw thread and the externally threaded screw thread of clutch base
Rotation direction is dextrorotation.
In the embodiment, dosage adjustment portion includes pen tube 110, dial drum 111, check sleeve 112,113 and of return barrel
Reverse-flighted screw；One end of pen tube is detachably connected with clutch base, that is to say, that the lower end of pen tube detachably connects with clutch base
It connects, pen tube is cylindrical, and clutch base is cylindrical, and the outer surface of clutch base is provided with pen tube boss 114 and positioning convex platform
115；Pen tube boss and the uniformly distributed outer surface in clutch base of positioning convex platform；The quantity of pen tube boss is 4, convex
The quantity of platform is two, and the inner wall of pen tube is provided with annular pen tube limiting slot 117 corresponding with pen tube boss, the lower end of pen tube
It is provided with pen tube locating slot 116 corresponding with positioning convex platform, the quantity of pen tube locating slot is two, and pen tube is fastened on clutch
After on seat, pen tube boss limit in annular pen tube limiting slot, positioning convex platform limit pen tube locating slot in, need to illustrate
It is that in the implementation column, pen tube boss, positioning convex platform, pen tube locating slot can also determines according to actual conditions, for example, convex
The quantity of platform and pen tube locating slot is 1 or 3.
In the embodiment, reverse-flighted screw is threaded through in return barrel, and reverse-flighted screw includes upper semisection 118 and lower semisection 119,
Upper semisection is threadedly coupled with return barrel.Lower semisection is connected with injection piston, specifically, lower semisection by rotating block 121 with
Injection piston 120 connects, wherein the connection of the end of rotating block and lower semisection, and rotating block can turn around the axis of lower semisection
Dynamic, injection piston is fixedly connected with rotating block, can be realized the rotation of injection piston in this way, in use, pushing away by injection piston
Medicament in dynamic flask for medicinal preparations makes it that flask for medicinal preparations be discharged.It, in this way can be with it should be noted that rotating block is detachably connected with lower semisection
Replace injection piston.Upper semisection has the first screw thread, and lower semisection has the second screw thread, the screw thread rotation of the first screw thread and the second screw thread
To on the contrary, the first screw thread nominal diameter be greater than the second screw thread nominal diameter, such lower semisection also enough enter return barrel and
Interference will not be generated, that is to say, that；The thread rotary orientation of first screw thread be it is left-handed, the thread rotary orientation of the second screw thread is dextrorotation；First
Screw thread and the second screw thread are double thread, by being arranged to double thread, can increase the movement that lead improves reverse-flighted screw
Speed.The screw pitch of first screw thread is 8.5mm, and the screw pitch of the second screw thread is 3mm.
In the embodiment, the first clutch further includes feed gear wheel 122 and clutch gear 123；Feed gear wheel and clutch
Gear is fastened in clutch base, and feed gear wheel can be meshed with clutch gear；Specifically, the lower end of feed gear wheel
Face is provided with the gear teeth, and the upper surface of clutch gear is provided with the gear teeth, the gear teeth and clutch gear on the lower end surface of feed gear wheel
The gear teeth on upper surface are opposite；The tooth form of the gear teeth on feed gear wheel and clutch gear is isosceles triangle；It needs to illustrate
It is that the tooth form of the gear teeth on feed gear wheel and clutch gear may be obtuse triangle or right angled triangle, wherein right angle three
The angular one of base angle for referring to the right angled triangle is right angle；That is, the wheel on feed gear wheel and clutch gear
Tooth can also be ratchet, for when another end motion of the reverse-flighted screw to medicine storehouse shell, i.e., moving towards the direction of injection needle
When dynamic, it can prevent feed gear wheel from rotating together with reverse-flighted screw.Clutch gear can along the axial movement of clutch base, but from
Closing gear cannot rotate around the axis of clutch base, and feed gear wheel can be rotated around the axis of clutch base, also being capable of edge
The axial movement of clutch base；Feed gear wheel is set on lower semisection, and feed gear wheel is threadedly coupled with lower semisection.It is specific and
It says, is provided with chuck 124 in clutch base；Chuck is provided with center card hole 125 and edge card hole 126, and feed gear wheel is provided with
Multiple first card bases 127, clutch gear are provided with multiple second card bases 128, and the first card base is fastened in the card hole of center, the first card
Foot can be fastened in edge card hole along the axial movement of clutch base, the second card base, and the second card base can be along clutch base
Axial movement；When by not by the storage chamber of flask for medicinal preparations inserting powder charge storehouse shell, feed gear wheel is mutually separated with clutch gear, this
When, feed gear wheel can be rotated freely around the axis of clutch base, when that flask for medicinal preparations will be inserted the storage chamber of powder charge storehouse shell,
Feed gear wheel is meshed with clutch gear, at this point, feed gear wheel cannot be rotated around the axis of clutch base.Feed gear wheel is also set up
There is the feeding screw thread matched with the second screw thread, the thread rotary orientation of the feeding screw thread is dextrorotation.
In the embodiment, dial drum is threaded through in pen tube, and dial drum is threadedly coupled with pen tube；Specifically, dial drum
It is threadedly coupled with pen tube by knurled nut 159, wherein knurled nut is connected together in dial drum, and knurled nut is set in quarter
It spends on cylinder.Knurled nut is made of transparent material；Dial drum is provided with sight vane 129, is provided with transparent scale on knurled nut
Window 130, transparent scale window are fastened in sight vane, and such knurled nut is just firmly fixed in pen tube；It is arranged on dial drum
There is scale external screw thread, knurled nut is provided with the scale internal screw thread matched with scale external screw thread, wherein scale external screw thread and quarter
It is left-handed for spending the rotation direction of internal screw thread；The externally threaded extending direction of scale is provided with dose calibration line 131 on dial drum, in this way
Convenient for accurate regulating dosage.
In the embodiment, check sleeve is threaded through in dial drum, and between the inner wall of dial drum and the upper end of check sleeve
It is provided with the second clutch, is rotated for when dial drum is screwed out from pen tube, making dial drum be able to drive check sleeve and do
The axial movement of movement and separate medicine storehouse shell；When dial drum screws in pen tube, dial drum makes rotating motion and close to medicine storehouse
The axial movement of shell, check sleeve only does the axial movement close to medicine storehouse shell, without making rotating motion.It needs to illustrate
It is that dial drum rotates clockwise just can screw out from pen tube namely dial drum does axial movement and rotation far from medicine storehouse shell
Movement；Dial drum rotates counterclockwise screws in pen tube, wherein being watcher from the upper end of pen tube to the extending direction of the lower end of pen tube
To the rotation counterclockwise of dial drum rotated clockwise with dial drum refers to from direction of observation, in addition the embodiment
In rotate clockwise and counterclockwise rotation refer to from direction of observation, be not repeated to describe herein.The inner wall of dial drum
The first detent mechanism is provided between the outer wall of check sleeve, for making check sleeve do unidirectional rotary motion；Specifically,
When dial drum is screwed out from pen tube clockwise, check sleeve just does unidirectional rotary motion, that is to say, that check sleeve is done at this moment
Up time rotary motion, and when dial drum screws in pen tube counterclockwise, check sleeve does not make rotating motion.Return barrel is threaded through inverse
Only in sleeve, and the upper end of return barrel and the upper end of check sleeve are connected together, and do single direction rotation when check sleeve for making
When movement, return barrel also does single rotary motion, and the direction of rotation of check sleeve is consistent with the direction of rotation of return barrel.
It is provided with third clutch between the lower end of check sleeve and the lower end of return barrel, is used for when dial drum screws in pen tube,
Check sleeve and return barrel is set to do the axial movement close to medicine storehouse shell, and check sleeve and return barrel cannot do and rotate
Movement.
In the embodiment, the second clutch includes the multiple first indexing teeth being arranged on the inner wall of the upper end of dial drum
132, and multiple second indexing teeth 133 of the upper end of check sleeve are set, inner wall of multiple first separation teeth along dial drum
Circumferential direction be uniformly distributed, the circumferential directions of upper end of multiple second indexing teeth along check sleeve are uniformly distributed, the quantity of the first indexing tooth
Identical as the second indexing quantity of tooth, the quantity of the first indexing tooth is 25.First indexing tooth is used to mutually nibble with the second indexing tooth
It closes, and the height of the first indexing tooth is identical as the second indexing height of tooth, is 0.8mm.When dial drum screws out pen tube clockwise
When, the first indexing tooth indexes tooth with second and is meshed, and makes rotating motion and axis so that dial drum is able to drive check sleeve
To movement, when dial drum screws in pen tube counterclockwise, first indexing tooth with second index tooth mutually separates, the lower end of dial drum with it is inverse
Only sleeve abuts against, so that check sleeve can only axially move.
Specifically, the upper end of check sleeve is provided with clutch knob 134, when pulling clutch knob makes clutch knob itself
When doing the axial movement far from medicine storehouse shell, clutch knob is able to drive check sleeve and does the axial movement far from medicine storehouse shell,
So that the second indexing tooth on check sleeve is meshed with the first indexing tooth on dial drum.The upper end of check sleeve is provided with more
A limit pawl 137, multiple limit pawls form limit spaces, and in the embodiment, the quantity for limiting pawl is 2；Clutch rotation
Button has button lid 135 and button axis 136, and button axis is fixed on the lower end surface of button lid, and button axis is fastened in limit space, and button axis and limit
There is setting axial spacing, specifically, this sets the distance of axial spacing as 0.8mm, that is to say, that clutch between the pawl of position
It rotates to when doing the axial movement far from medicine storehouse shell, when axial movement distance is 0.8mm, just makes the second indexing tooth and the
One division tooth is meshed.Clutch knob can be rotated freely around the axis of pen tube, also can be along the axial movement of pen tube.Dial drum
Upper end be fixed with active knob 139, and active knob dial drum is connected together, and active knob is internally provided with knob card
Slot, the upper end of dial drum are provided with knob chuck 140, and knob chuck limits in knob card slot.The outer surface of active rotation
Circumferentially it is provided with skid resistance strip.The upper surface of active knob offers first through hole, and button axis is threaded through in first through hole.
In the embodiment, the first detent mechanism includes the pawl 141 that the outer surface of check sleeve is arranged in, and setting exists
Multiple ratchets 145 on the inner wall of dial drum, multiple ratchets are uniformly distributed along the circumferential direction of dial drum, in first detent mechanism
Pawl has elasticity；When dial drum screws out pen tube clockwise, pawl is by ratchet backstop, so that check sleeve can be with quarter
Cylinder rotation is spent, when dial drum screws in pen tube counterclockwise, pawl cannot be by ratchet backstop, so that check sleeve can not be with
Dial drum rotation, that is to say, that realize check sleeve and only do unidirectional rotary motion.In addition when dial drum screws in pen tube counterclockwise
When, pawl is in contact with ratchet, can generate the sound rattled away, user is by listening sound to will appreciate that injection pen works normally.Spine
The width of the facewidth of tooth is not less than the externally threaded length of scale on dial drum, wherein axial direction of the facewidth of ratchet along ratchet
Width.The quantity of pawl is 1, and the quantity of ratchet is 25, can also realize the accurate of injection volume by pawl and ratchet
It adjusts, and when realizing injection, the rotational angle that dial drum is counterclockwise.The circumferential direction of the outer surface of check sleeve is additionally provided with ring
Shape sizing boss 146 can guarantee that the axis of check sleeve is overlapped with the axis of dial drum by annular sizing boss, ensure that
Pawl in dial drum with the degree of engagement of ratchet.
In the embodiment, the upper end of check sleeve has card slot 147, and the upper end of return sleeve has card column 148, and card column is set
It sets in card slot, in this way when check sleeve makes rotating motion and is axially moved, return sleeve can also be done with check sleeve
Rotary motion and axial movement.The quantity of card column be it is multiple, the quantity of card slot is multiple；In the embodiment, card column and card slot
Quantity is 6.
In the embodiment, third clutch includes the first spring 149, second spring 150, two-sided mesh piece 151, setting
In the lower end of check sleeve first end face gear 152 and be set to return barrel lower end second end face gear 153, it is double
The upper surface of face mesh piece is provided with third face gear 154, and the lower end surface of two-sided mesh piece is provided with the 4th face gear
155；First spring, two-sided mesh piece and second spring are respectively sleeved on return barrel, wherein second spring is located at second end
The top of face gear, two-sided mesh piece are located at the top of second spring, and the first spring is located at the top of two-sided mesh piece, first end
Face gear is located at the top of the first spring.Specifically, the lower end surface of first end face gear is provided with the gear teeth, second end face gear
Upper surface be provided with the gear teeth, the gear teeth on first end face gear with the gear teeth on third face gear for being meshed, second
The gear teeth on end face with the gear teeth on the 4th face gear for being meshed；The gear teeth, third end-tooth on first end face gear
The gear teeth on the gear teeth and the 4th face gear on the gear teeth, second end face on wheel can be ratchet or be isosceles triangle
Tooth；The circumferential direction of two-sided mesh piece is provided with feather key, and the inner wall of pen tube is provided with keyway corresponding with feather key；Feather key is limited in key
In slot, so that two-sided mesh piece can be along the axial movement of pen tube.The quantity of feather key is two, and the quantity of keyway is two, key
The length direction of slot and the axial direction of pen tube are parallel, the length of keyway and the equal length of pen tube；Mesh piece two-sided in this way is only
It can cannot make rotating motion around the axis of pen tube in pen tube along the axial movement of pen tube, the circumferential direction of two-sided mesh piece is also set
It is equipped with positioning ring 158, can guarantee the axis of two-sided mesh piece and the axis collinear of pen tube by positioning ring.Upon injection, it carves
Degree cylinder screws in pen tube counterclockwise, and the upper surface of the first end face gear of the lower end and lower end of check sleeve of dial drum abuts against,
In second clutch, the first indexing tooth on dial drum is mutually separated with the second indexing tooth on check sleeve, the first pawl machine
Pawl in structure on check sleeve no longer plays backstop action to the ratchet on dial drum, therefore dial drum pushes check sleeve and leans on
The axial movement of nearly medicine storehouse shell, the first spring and second spring are compressed, the gear teeth on such first end face gear just with
The gear teeth on third face gear are meshed, and the gear teeth in second end face are just meshed with the gear teeth on the 4th face gear, this
Sample check sleeve, two-sided mesh piece and return barrel just form an entirety, synchronize movement, since two-sided mesh piece can only
Axial direction along pen tube moves, thus dial drum screw in counterclockwise pen container it is mobile to the direction close to medicine storehouse shell when, check
Sleeve and return barrel can only also do to the direction close to medicine storehouse shell and axially move, and cannot make rotating motion；It needs
It is bright, since when dial drum, which pushes check sleeve, does close to the axial movement of medicine storehouse shell, dial drum does rotation counterclockwise
Movement, therefore check sleeve has the tendency that making rotating motion, but due to the gear teeth on first end face gear just with third end face
The gear teeth on gear are meshed, and the gear teeth in second end face are just meshed with the gear teeth on the 4th face gear and two-sided engagement
The cause that part can only be axially moved, therefore prevent the rotary motion of check sleeve and return barrel.
In the embodiment, knurled nut 159 is also provided with feather key 156, and the feather key of knurled nut also limits in keyway 157,
The connection that can reinforce knurled nut and pen tube in this way prevents knurled nut from rotating around the axis of pen tube.Active knob and scale spiral shell
The second ratchet mechanism is provided between mother, the second ratchet mechanism includes the ratchet being arranged on active knob and is arranged in scale spiral shell
Ratchet on mother, the ratchet on active knob for being meshed with the ratchet on knurled nut, when on active knob ratchet with
After ratchet on knurled nut is meshed, active knob can only do clockwise rotary motion around the axis of pen tube, and cannot do
Rotary motion counterclockwise can be prevented after the completion of injection, the zero graduation line on dial drum by the way that the second ratchet mechanism is arranged
It misplaces with transparent scale window.
The working principle of injection pen provided in an embodiment of the present invention are as follows:
1, the dosage Principles of Regulation before injecting
Feed gear wheel and clutch gear phase after flask for medicinal preparations to be inserted into the storage chamber of medicine storehouse shell, in the first clutch
Engagement, feed gear wheel, which cannot make rotating motion, to axially move；In third clutch, due to the work of the first spring
With the gear teeth on gear teeth third face gear on first end face gear mutually separate, due to the effect of second spring, second end face
On the gear teeth just mutually separated with the gear teeth on the 4th face gear.Clutch knob is pulled to make in the second clutch, on dial drum
The first separation tooth index tooth with second on check sleeve and be meshed, rotate clockwise dial drum in this way, dial drum is from pen tube
When middle back-out, check sleeve just also makes rotating motion and does the axial movement far from medicine storehouse shell, due to check sleeve and return
Barrel is connected together, therefore return barrel also makes rotating motion and do the axial movement far from medicine storehouse shell, due to reverse-flighted screw
Upper semisection on the first screw thread and lower semisection on the second screw thread thread rotary orientation on the contrary, therefore when return barrel rotate when,
Reverse-flighted screw can keep opposing stationary with pen tube, that is to say, that the rotation of return barrel, reverse-flighted screw are not rotated, just realized in this way
Dosage before having injection is adjusted.
2, principle is injected
When adjusting injection after required drug dose, unclamp clutch knob, in the second clutch, on dial drum the
One separation tooth is mutually separated with the second indexing tooth on check sleeve, is pressed clutch knob, just dial drum is made to screw in pen counterclockwise
Pipe, since the upper surface of the first end face gear of the lower end and lower end of check sleeve of dial drum abuts against, check sleeve by
To the effect of downward power, the first spring and second spring are just compressed, and the gear teeth on such first end face gear are just with
The gear teeth on three face gears are meshed, and the gear teeth in second end face are just meshed with the gear teeth on the 4th face gear, in this way
Check sleeve, two-sided mesh piece and return barrel just form an entirety, synchronize movement, additionally, due to the first detent mechanism
Check sleeve can only be made to do unidirectional rotary motion, the pawl on check sleeve no longer plays backstop to the ratchet on dial drum and makees at this time
With since two-sided mesh piece can only be moved along the axial direction of pen tube, check sleeve and return barrel are just only done to close
The direction of medicine storehouse shell axially moves, due to the upper semisection screw connection of return barrel and reverse-flighted screw, due to upper semisection by
The downward axial force of return barrel, therefore the upper semisection of reverse-flighted screw just constantly screws in return barrel, in addition reverse-flighted screw
Upper semisection and lower semisection are an entirety, and such lower semisection is also by the downward axial force of return barrel, therefore reverse-flighted screw
Lower semisection just constantly screw in feed gear wheel downwards, such injection piston is just mobile to the direction of injection needle in flask for medicinal preparations,
Medicament in flask for medicinal preparations is just discharged, to realize injection.
3, principle is reused
Flask for medicinal preparations is taken out out of medicine storehouse shell, clutch base and medicine storehouse shell are dismantled, such feed gear wheel and clutch
Gear is just separated and is no longer meshed, and feed gear wheel just can rotate freely in the card hole of center, and reverse-flighted screw is returned to note in this way
When state before penetrating, the upper semisection of reverse-flighted screw just can rotate freely in return barrel, due to feed gear wheel at this time can from
By rotating, therefore feed gear wheel can also be rotated freely with the lower semisection of reverse-flighted screw, just avoid on upper semisection in this way
The second screw thread on one screw thread and lower semisection generates interference, and upper semisection is enabled smoothly to return back to original state, just real in this way
Show the rollback of reverse-flighted screw, namely reuses injection pen.
In conclusion injection pen provided in this embodiment passes through the first clutch of setting, after the completion of injection, Neng Goushi
The original state of existing reverse-flighted screw returning back to before injection, the clutch base of the first clutch, which is detachably connected, realizes medicament
Bottle it is replaceable, to realize the recycling of resource, reduce the purchase cost of user, alleviate the burden of user.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of injection pen, which is characterized in that including dosage adjustment portion and medicine storehouse portion；Medicine storehouse portion is preinstalled with medicine for storing
The flask for medicinal preparations of agent；The dosage adjustment portion is used to adjust drug dose when injection, and makes the flask for medicinal preparations discharge setting dosage
Medicament；
Medicine storehouse portion includes medicine storehouse shell and the first clutch, and first clutch includes clutch base, it is described from
Clutch seat and one end of medicine storehouse shell are detachably connected；
The dosage adjustment portion includes pen tube, dial drum, check sleeve, return barrel and reverse-flighted screw；One end of the pen tube
It is detachably connected with the clutch base；
The dial drum is threaded through in the pen tube, and the dial drum is threadedly coupled with the pen tube by knurled nut,
In, the knurled nut is fixed in the pen tube, and scale external screw thread, the knurled nut setting are provided on the dial drum
There is the scale internal screw thread matched with the scale external screw thread；Transparent scale window is provided on the knurled nut；
The check sleeve is threaded through in the dial drum, and between the inner wall of the dial drum and the upper end of the check sleeve
It is provided with the second clutch, for making the dial drum be able to drive institute when the dial drum is screwed out from the pen tube
State check sleeve make rotating motion and far from medicine storehouse shell axial movement；
It is provided with the first detent mechanism between the inner wall of the dial drum and the outer wall of the check sleeve, for making the check
Sleeve does unidirectional rotary motion；
The return barrel is threaded through in the check sleeve, and the upper end of the upper end of the return barrel and the check sleeve
It is connected together；
It is provided with third clutch between the lower end of the check sleeve and the lower end of the return barrel, for working as the quarter
When spending the cylinder screw-in pen tube, the check sleeve and the return barrel is made to do the axial movement close to medicine storehouse shell；
The reverse-flighted screw is threaded through in the return barrel, and the reverse-flighted screw includes upper semisection and lower semisection, the upper half
Section is threadedly coupled with the return barrel；
The upper end of the dial drum is fixed with active knob, and the active knob is connected together with the dial drum；The master
It is provided with the second ratchet mechanism between dynamic knob and the knurled nut, after the completion of preventing injection, on the dial drum
Zero graduation line and the transparent scale window misplace；Second ratchet mechanism include the ratchet being arranged on the active knob and
Ratchet on the knurled nut is set, and the ratchet on the active knob with the ratchet on the knurled nut for mutually nibbling
It closes.
2. injection pen according to claim 1, it is characterised in that: first clutch further include feed gear wheel and from
Close gear；The feed gear wheel and the clutch gear are fastened in the clutch base, and the feed gear wheel can be with
The clutch gear is meshed；The clutch gear can be along the axial movement of the clutch base；The feed gear wheel is arranged
On the lower semisection, and the feed gear wheel is threadedly coupled with the lower semisection.
3. injection pen according to claim 2, it is characterised in that: the upper semisection has the first screw thread, the lower semisection
With the second screw thread, first screw thread is opposite with the thread rotary orientation of second screw thread.
4. injection pen according to any one of claim 1-3, it is characterised in that: second clutch includes setting
On the inner wall of the upper end of the dial drum it is multiple first indexing teeth, and be arranged in the check sleeve upper end it is multiple
Second indexing tooth, the first indexing tooth are used to be meshed with the second indexing tooth.
5. injection pen according to claim 4, it is characterised in that: the upper end of the check sleeve is provided with clutch knob,
When pulling the clutch knob that it is made to do the axial movement far from medicine storehouse shell, the clutch knob is able to drive described
Check sleeve does the axial movement far from medicine storehouse shell, so that the second indexing tooth and the scale on the check sleeve
The first indexing tooth on cylinder is meshed.
6. injection pen according to claim 5, it is characterised in that: the upper end of the check sleeve is provided with multiple limit spine
Pawl, multiple limit pawls form limit space；The clutch knob has button lid and button axis, and the button axis is fixed on button lid
Lower end surface, the button axis is fastened in the limit space, and has setting shaft between the button axis and the limit pawl
To spacing.
7. injection pen according to claim 6, it is characterised in that: it is logical that the upper surface of the active knob offers first
Hole, the button axis are threaded through in the first through hole.
8. injection pen according to any one of claim 1-3, it is characterised in that: first detent mechanism includes setting
Pawl in the outer surface of the check sleeve, and the multiple ratchets being arranged on the inner wall of the dial drum, it is multiple described
Ratchet is uniformly distributed along the circumferential direction of the dial drum.
9. injection pen according to any one of claim 1-3, it is characterised in that: the third clutch includes first
Spring, second spring, two-sided mesh piece, be set to the check sleeve lower end first end face gear and be set to described
The second end face gear of the lower end of return barrel, the upper surface of the two-sided mesh piece is provided with third face gear, described double
The lower end surface of face mesh piece is provided with the 4th face gear；First spring, the two-sided mesh piece and the second spring
It is respectively sleeved on the return barrel, wherein the second spring is located at the top of the second end face gear, described two-sided
Mesh piece is located at the top of the second spring, and first spring is located at the top of the two-sided mesh piece, the first end
Face gear is located at the top of first spring.
10. injection pen according to claim 9, it is characterised in that: the circumferential direction of the two-sided mesh piece is provided with feather key, institute
The inner wall for stating pen tube is provided with keyway corresponding with the feather key；The feather key limit is in the keyway, so that described double
Face mesh piece can be along the axial movement of the pen tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610329296.0A CN106039475B (en) | 2016-05-18 | 2016-05-18 | A kind of injection pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610329296.0A CN106039475B (en) | 2016-05-18 | 2016-05-18 | A kind of injection pen |
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| Publication Number | Publication Date |
|---|---|
| CN106039475A CN106039475A (en) | 2016-10-26 |
| CN106039475B true CN106039475B (en) | 2019-08-02 |
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| CN201610329296.0A Active CN106039475B (en) | 2016-05-18 | 2016-05-18 | A kind of injection pen |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109701109B (en) * | 2019-03-13 | 2024-01-30 | 深圳中科生物医疗电子有限公司 | Infusion mechanism |
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| CN106039475A (en) | 2016-10-26 |
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