CN113230492A - Adjustable dosage liquid medicine feeding device - Google Patents
Adjustable dosage liquid medicine feeding device Download PDFInfo
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- CN113230492A CN113230492A CN202110528528.6A CN202110528528A CN113230492A CN 113230492 A CN113230492 A CN 113230492A CN 202110528528 A CN202110528528 A CN 202110528528A CN 113230492 A CN113230492 A CN 113230492A
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- injection
- dose
- pen container
- limiting
- adjusting
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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
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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
- 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
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
- A61M5/31551—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe including axial movement of dose setting member
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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 invention relates to the technical field of medical appliances, in particular to a liquid medicine feeding device with adjustable dose, which comprises a pen container, wherein an accommodating cavity is formed in the axial direction of the pen container, a pen cap is arranged at the front end of the pen container, an injection needle end is arranged at the front end of the pen container, the liquid medicine feeding device further comprises an injection device and an adjusting assembly, the injection device comprises an injection piece, the injection piece is movably arranged in the accommodating cavity, the adjusting assembly comprises a fixedly arranged limiting piece and a movably arranged dose adjusting piece, a plurality of dose adjusting grooves are formed in the inner side wall of the pen container in the axial direction, the lengths of the dose adjusting grooves are different, a sliding part in sliding fit with the dose adjusting grooves is arranged on the dose adjusting piece, the limiting piece limits that the injection piece can only move close to the injection needle end, and the dose adjusting piece limits that the injection piece can only move away from the injection needle end relative to the injection piece. The liquid medicine feeding device with adjustable dose can adjust the injection dose according to the conditions of different patients, and the injection dose is not easily influenced by external force in the injection process.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a liquid medicine feeding device with adjustable dose.
Background
At present, for some special clinical patients, such as diabetics, hepatitis patients and the like, insulin, interferon, auxin, vaccines and the like need to be injected in different occasions, the requirement on injection dosage is high, and different dosages of medicines need to be injected according to different patients.
The injection amount of the existing liquid medicine feeding device for injection is generally fixed, the injection amount is not convenient to adjust according to the conditions of different patients when the device is used, the structure is complex, the injection operation is inconvenient, and in addition, the existing injection pen capable of adjusting the injection amount has the defects of high price, complex structure, inconvenient use and the like.
The current chinese patent with publication number CN210873461U discloses a disposable injection pen capable of adjusting dosage, which comprises a pen cap, a medicine storage bin, a limiting block, a screw rod, a rotating sleeve, a fixed cylinder and an adjusting knob, wherein the rotating sleeve is arranged in the fixed cylinder, one end of the rotating sleeve is provided with the adjusting knob, the screw rod is arranged in the rotating sleeve, a thread structure capable of adjusting the relative position of the screw rod and the fixed cylinder is arranged between the screw rod and the fixed cylinder, one end of the limiting block is assembled on the top end of the medicine storage bin through an anti-rotating structure, the bottom end of the screw rod penetrates into an inner hole of the limiting block, a limiting structure used for enabling the screw rod to move only in the injection direction relative to the limiting block is arranged between the limiting block and the screw rod, an arc-shaped tooth used for controlling the precision of the injected dosage is arranged in the fixed cylinder, and at least one single tooth meshed with the arc-shaped tooth is arranged at the bottom end of the rotating sleeve.
Although injection pen among the above-mentioned technical scheme can adjust the injection dosage, makes rotatory sleeve follow screw rod axial motion in the pivoted through rotating rotatory sleeve, but after adjusting the injection dosage, and not set up the rotation of limit structure restriction rotatory sleeve, rotatory sleeve receives easy emergence rotation under the exogenic action at injection in-process, and rotatory sleeve pivoted back can make rotatory sleeve take place axial motion for the screw rod, can influence the precision of injection.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the technical problem that the injection pen is easy to rotate under the action of external force during the injection process and the injection precision is influenced in the prior art, the invention provides the liquid medicine feeding device with adjustable dose.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a dosage adjustable liquid medicine feeding device, includes the pen container, the pen container is provided with along the axial and holds the chamber, the front end of pen container is the injection needle end, still includes:
the injection device comprises an injection piece movably arranged in the accommodating cavity, and the injection piece is axially arranged along the pen container;
the adjusting component comprises a limiting part fixedly arranged in the accommodating cavity and a dosage adjusting part movably arranged in the accommodating cavity, the inner side wall of the pen container is axially provided with a plurality of dosage adjusting grooves, the lengths of the dosage adjusting grooves are different, the dose adjusting piece is provided with a sliding part in sliding fit with the dose adjusting grooves, one end of each dose adjusting groove close to the end of the injection needle is provided with a movable space for the sliding part to rotate along the central shaft of the pen container, one ends of the dose adjusting grooves close to the end of the injection needle are communicated with the movable space, the limiting piece limits the injection piece to move only near the end of the injection needle, the moving direction of the limiting piece is along the axial direction of the pen container, the dose setting member is limited to move only relative to the injection member in a direction away from the end of the needle, the direction of movement of the dose setting member being in the axial direction of the barrel.
The invention relates to a liquid medicine feeding device with adjustable dosage, when in use, a sliding part at an initial position is positioned in a movable space, a dosage adjusting piece is rotated to enable the dosage adjusting piece to correspond to a dosage adjusting groove with required dosage, the dosage adjusting piece is pulled to be far away from an injection needle end along the axial direction of a pen barrel, at the moment, a limiting piece limits the injection piece to enable the injection piece not to move far away from the injection needle end along the axial direction of the pen barrel, so that the dosage adjusting piece moves far away from the injection needle end along the axial direction of the pen barrel relative to the injection piece, the distance between the dosage adjusting piece and the limiting piece is adjusted, then, injection operation is carried out, when in injection, the dosage adjusting piece is pushed to be close to the injection needle end along the axial direction of the pen barrel, at the moment, the dosage adjusting piece pushes the injection piece to be close to the injection needle end to move to inject medicine along the injection needle end through a push rod, when the dosage adjusting piece slides to be abutted against the limiting piece, the dose adjusting piece cannot move close to the injection needle end continuously along the axial direction of the pen container, the push rod cannot move close to the injection needle end along the axial direction of the pen container any more, injection is stopped, the injection dose of the injection pen is adjusted by adjusting the distance between the dose adjusting piece and the limiting piece, the adjusting mode is simple, operation is easy, and in the injection process, the dose adjusting piece and the injection piece cannot move relatively along the axial direction of the pen container, so that the precision of the injection dose cannot be influenced, and the dose adjusting precision is high.
Further, the injection piece is a push rod which is movably arranged along the axial direction of the pen container;
the injection device further comprises:
the pen holder is fixedly arranged at the front end of the pen container, a pen cap is sleeved on the pen holder, and the pen cap is detachably and fixedly connected with the pen holder;
the medicine bottle is arranged in the refill support, an injection plug is arranged in the medicine bottle, and the push rod pushes the injection plug to move close to the end of the injection needle along the axial direction of the pen container.
When the injection is carried out, the dose adjusting piece is pushed to be close to the injection needle end along the axial direction of the pen container, the dose adjusting piece pushes the push rod to move to be close to the injection needle end, and the push rod pushes the injection plug to move to be close to the injection needle end along the axial direction of the pen container, so that the medicine is pushed to the injection needle end, the injection function is better realized, the structure is simple, and the operation is convenient.
Furthermore, the annular groove has been seted up along circumference on the push rod, the annular groove is provided with a plurality ofly along the push rod axial, the annular groove has two inside walls, and two inside walls are first inside wall and second inside wall respectively, first inside wall sets up with the center pin of push rod is perpendicular, form contained angle a between second inside wall and the first inside wall, contained angle a is the acute angle, the tip that dose adjusting part is close to the syringe needle end is provided with the first grafting portion that has elasticity, first grafting portion pegs graft into in the annular groove, the tip that the locating part is close to the syringe needle end is equipped with second grafting portion, second grafting portion pegs graft into in the annular groove.
When carrying out the dose adjustment, first inside wall can carry on spacingly to the dose control spare, and when the injection, the dose control spare can promote the push rod to the direction motion of syringe needle end with first inside wall is inconsistent.
Furthermore, the locating part includes limit sleeve, limit sleeve is fixed to be set up in the pen container, limit sleeve suit is on the push rod, the locating part still includes a plurality of limit jaws that have certain elasticity, limit jaw fixed connection is in limit sleeve axial one end, and is a plurality of limit jaw sets up along limit sleeve circumference, and is a plurality of limit jaw forms into second grafting portion, limit jaw and ring channel grafting cooperation and with the laminating of the inboard wall of second mutually.
When carrying out the dose regulation, spacing jack catch when inconsistent with first inside wall, spacing jack catch carries on spacingly to the push rod for the push rod can't keep away from the injection needle end motion along the pen container axial, when injecting, the push rod is close to the injection needle end along the pen container axial and removes the in-process, the second inside wall is inconsistent with spacing jack catch, the effect of the conflict of the inboard face spacing jack catch of second, the spacing jack catch that has certain elasticity can be followed the radial outward motion of push rod, the push rod continues to be close to the injection needle end along the pen container axial and removes, spacing jack catch can be pegged graft into adjacent ring channel once more.
Further, a dose adjusting rod is movably arranged in the pen container along the axial direction of the pen container, the push rod axially penetrates through the dose adjusting rod and is in sliding fit with the dose adjusting rod, and the rear end of the dose adjusting rod extends out of the pen container;
the dose adjuster comprises:
the dose adjusting cylinder is arranged in the pen container along the axial direction of the pen container, the dose adjusting cylinder is arranged at the front end of the dose adjusting rod, the dose adjusting cylinder is sleeved on the push rod, the sliding part is a convex block arranged on the outer side wall of the dose adjusting cylinder, and the convex block is in sliding fit with the dose adjusting groove;
the dosage clamping jaws are fixedly connected to one axial end of the dosage adjusting barrel, the dosage clamping jaws have certain elasticity, the dosage clamping jaws are formed into the first inserting portion, the dosage clamping jaws are in inserting fit with the annular groove and attached to the second inner side wall, and the dosage clamping jaws are arranged along the circumferential direction of the dosage adjusting barrel.
When dosage adjustment is carried out, the push rod cannot move away from the end of the injection needle along the axial direction of the pen container under the action of the limiting clamping jaws, the dosage adjusting rod is pulled along the axial direction of the pen container away from the end of the injection needle, the dosage clamping jaws are abutted against the second inner side surfaces of the annular grooves, so that the dosage clamping jaws move outwards along the radial direction of the push rod, the dosage clamping jaws are conveniently inserted into the adjacent annular grooves, and the dosage clamping jaws crawl on the push rod along the axial direction of the push rod away from the end of the injection needle; when injection is carried out, the dose adjusting rod is pushed close to the end of the injection needle along the axial direction of the pen container, the dose clamping jaws are abutted against the first inner side face in the annular groove, and the push rod moves close to the end of the injection needle along the axial direction of the pen container under the pushing force action of the dose clamping jaws, so that injection is carried out.
Further, a claw joint is arranged in the pen container and is fixed in a clamping fit with the pen container, a limiting sleeve is fixed in a clamping fit with the claw joint, the claw joint is sleeved on the limiting sleeve, and the claw joint is fixedly connected with the pen core support. The jaw joint is convenient for fixedly mounting the limiting sleeve on the pen container.
Further, the clamping jaw connector is provided with a clamping block, a clamping hole is formed in the side face of the pen container, the clamping block is inserted into the clamping hole, and the clamping jaw connector is abutted to the inner wall of the pen container.
The clamping block is inserted into the clamping hole, so that the clamping claw joint and the pen container can be prevented from rotating relatively, the clamping claw joint and the pen container can be prevented from moving relatively along the axial direction, the clamping claw joint is abutted against the inner wall of the pen container, the clamping claw joint can be prevented from jumping in the radial direction of the pen container, and the clamping claw joint and the pen container are more compactly connected.
Further, the jack catch connects and keeps away from the first spacing piece of fixedly connected with on the terminal surface of injection needle end, first spacing piece connects lateral wall department to the jack catch from the jack catch and connects the inside wall department to extend and extend to protrusion in the jack catch and connect the inside wall, the terminal surface that first spacing piece is close to the injection needle end is inconsistent with the terminal surface that spacing sleeve kept away from the injection needle end, fixedly connected with has certain elastic stationary blade on the lateral wall of spacing sleeve, the stationary blade is pegged graft along the spacing sleeve axial in the spacing sleeve and with the laminating of spacing sleeve medial wall mutually, the stationary blade is kept away from and is equipped with the spacing piece of second on the terminal surface of injection needle end, the spacing piece of second connects the inside wall department to extend to jack catch joint lateral wall department from the jack catch, the terminal surface that the spacing piece of second is close to the injection needle end is connected with the jack catch and is kept away from the terminal surface of injection needle end and is inconsistent.
When the limit sleeve is fixed on the jaw joint, the jaw joint is sleeved on the limit sleeve, and when the jaw joint is sleeved, because the fixing piece has certain elasticity, the fixing piece is pressed towards the inner side of the limiting sleeve, the fixing piece shrinks towards the inner side of the limiting sleeve so as to be convenient for inserting the fixing piece into the limiting sleeve, the jaw joint is sleeved on the limiting sleeve, under the action of the elastic restoring force of the fixed piece, the fixed piece expands along the outer side of the limiting sleeve, so that the second limiting piece expands to the outer side wall of the jaw joint, and the end surface of the second limiting sheet close to the end of the injection needle is abutted against the end surface of the claw joint far away from the end of the injection needle, thereby prevent that spacing sleeve from being close to the syringe needle end motion along the axial, the terminal surface that is close to the syringe needle end through first spacing piece is inconsistent with the terminal surface that spacing sleeve kept away from the syringe needle end to prevent that spacing sleeve from keeping away from the syringe needle end motion along the axial.
Furthermore, the front end of the push rod is sleeved with a push sheet, and the end surface of the push sheet close to the end of the injection needle is attached to the injection plug. The push sheet is attached to the injection plug, so that the push force applied to the injection plug is more uniform when the push rod is pushed.
The invention has the advantages that when in use, the dosage adjusting piece is rotated to enable the dosage adjusting piece to correspond to the dosage adjusting groove of the required dosage, the dosage adjusting piece is pulled to be far away from the end of the injection needle along the axial direction of the pen container, the limiting piece limits the injection piece at the moment, the injection piece cannot move far away from the end of the injection needle along the axial direction of the pen container, the dosage adjusting piece moves far away from the end of the injection needle along the axial direction of the pen container relative to the injection piece, the distance between the dosage adjusting piece and the limiting piece is adjusted, then injection operation is carried out, when in injection, the dosage adjusting piece is pushed to be close to the end of the injection needle along the axial direction of the pen container, the dosage adjusting piece pushes the injection piece to be close to the end of the injection needle, medicine is pushed to be injected along the end of the injection needle through the push rod, when the dosage adjusting piece slides to be in contact with the limiting piece, the dosage adjusting piece cannot continuously move close to the end of the injection needle along the axial direction of the pen container, the push rod does not move close to the end of the injection needle along the axial direction of the pen container any more, the injection is stopped, the injection dosage of the injection pen is adjusted by adjusting the distance between the dosage adjusting piece and the limiting piece, the adjusting mode is simple and easy to operate, and after the actual injection is started, the dosage adjusting piece and the injection piece do not move relatively along the axial direction of the pen container, so that the precision of the injection dosage is not influenced, the dosage adjusting piece does not rotate relative to the injection piece along the circumferential direction of the pen container, the distance between the dosage adjusting piece and the limiting piece is not changed, the precision of the injection dosage is not influenced, and the dosage adjusting precision is higher;
when the limit sleeve is fixed on the jaw connector, the jaw connector is sleeved on the limit sleeve, when the limit sleeve is sleeved, as the fixed sheet has certain elasticity, the fixed sheet is pressed towards the inner side of the limit sleeve, the fixed sheet shrinks towards the inner side of the limit sleeve so as to be convenient for inserting the fixed sheet into the limit sleeve, after the jaw connector is sleeved on the limit sleeve, under the action of elastic restoring force of the fixed sheet, the fixed sheet expands along the outer side of the limit sleeve, so that the second limit sheet expands to the outer side wall of the jaw connector, and the end surface of the second limit sheet close to the injection needle end is abutted against the end surface of the jaw connector far away from the injection needle end, so that the limit sleeve is prevented from moving close to the injection needle end along the axial direction, and the end surface of the first limit sheet close to the injection needle end is abutted against the end surface of the limit sleeve far away from the injection needle end, so as to prevent the limit sleeve from moving away from the injection needle end along the axial direction, thereby be convenient for install spacing sleeve on the jack catch connects to connect through the jack catch and carry on spacingly to spacing sleeve along the axial.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic sectional view of a preferred embodiment of a liquid medicine feeding device with adjustable dosage of the present invention.
Fig. 2 is an exploded view of a dose adjustable medical fluid administration device according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural view of an injection device embodying the preferred embodiment of the present invention.
Fig. 4 is an enlarged view at a in fig. 3.
Fig. 5 is a schematic diagram of the structure of the adjustment for embodying the preferred embodiment of the present invention.
Fig. 6 is a perspective structure diagram of a pen container according to a preferred embodiment of the present invention.
Fig. 7 is a schematic sectional view of the structure of an adjusting member for embodying the preferred embodiment of the present invention.
Fig. 8 is a schematic view of the assembly of the jaw joint and the spacing sleeve of the preferred embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a limiting sleeve and a limiting jaw in the preferred embodiment of the invention.
Figure 10 is a schematic diagram of the jaw coupling of the preferred embodiment of the present invention.
Fig. 11 is an enlarged schematic view of the dose adjustment lever of fig. 2.
Fig. 12 is an enlarged schematic view of the dose dial barrel of fig. 2.
In the figure: 100. a pen container; 11. an accommodating chamber; 200. a pen cap;
300. an injection device; 31. a push rod; 311. an annular groove; 312. a first inner side wall; 313. a second inner side wall; 314. pushing the sheet; 32. a cartridge holder; 33. a medicine bottle; 34. an injection plug;
400. an adjustment assembly; 41. a limiting member; 411. a limiting sleeve; 412. a limiting jaw;
42. a dose setting member; 421. a dose adjustment cartridge; 4211. a guide groove; 4212. end faces of the guide grooves; 4213. a dose adjustment barrel bottom surface; 422. a dosage jaw;
423. a dose adjustment lever; 4231. a guide driving section; 4232. driving the block; 4233. an abutting end face; 4234. a thrust end face; 4235. driving the ribs;
43. a dose adjustment slot; 431. stopping the opening; 44. a sliding part; 45. an activity space;
46. a jaw joint; 461. a clamping block; 462. a clamping hole; 463. a first limiting sheet; 464. a fixing sheet; 465. a second limiting sheet.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Referring to fig. 1 and 2, a barrel 100 is axially provided with a receiving chamber 11, an injection button is movably provided at a rear end of the barrel 100, a front end of the barrel 100 is an injection needle end, and an injection device 300 includes an injection member movably disposed in the receiving chamber 11, the injection member being axially disposed along the barrel 100.
Referring to fig. 3 to 7, the adjusting assembly 400 includes a limiting member 41 fixedly disposed in the accommodating cavity 11 and a dose adjusting member 42 movably disposed in the accommodating cavity 11, a plurality of dose adjusting grooves 43 are axially disposed on an inner sidewall of the pen barrel 100, lengths of the dose adjusting grooves 43 are different, a sliding portion 44 slidably engaged with the dose adjusting grooves 43 is disposed on the dose adjusting member 42, a movable space 45 for the sliding portion 44 to rotate along a central axis of the pen barrel 100 is disposed at an end of the dose adjusting groove 43 close to an end of the injection needle, one end of the dose adjusting grooves 43 close to the end of the injection needle is communicated with the movable space 45, the limiting member 41 enables the injection member to move only in a direction close to the end of the injection needle along the axial direction of the pen barrel 100, and the dose adjusting member 42 enables the injection member to move only in a direction close to the end of the injection needle relative to the dose adjusting member 42 along the axial direction of the pen barrel 100.
The injection member is a push rod 31, the push rod 31 is movably arranged along the axial direction of the pen container 100, a plurality of annular grooves 311 are arranged on the push rod 31 along the circumferential direction, the annular grooves 311 are arranged along the axial direction of the push rod 31, the plurality of annular grooves 311 are arranged at equal intervals along the axial direction of the push rod 31, and the distance includes the condition that the interval distance between the annular grooves 311 is zero. The annular grooves 311 can also be arranged at unequal distances along the axial direction of the push rod 31, the annular groove 311 has two inner side walls, the two inner side walls are respectively a first inner side wall 312 and a second inner side wall 313, the first inner side wall 312 is approximately perpendicular to the central axis of the push rod 31, an included angle a is formed between the second inner side wall 313 and the first inner side wall 312, the included angle a is an acute angle, the second inner side wall 313 is obliquely arranged from the inner side of the annular groove 311 to the direction far away from the end of the injection needle, the end part of the dose adjusting member 42 close to the end of the injection needle is provided with an elastic first inserting part, the first inserting part is inserted into the annular groove 311, so that the injection member is limited to move relative to the dose adjusting member 42 along the axial direction far away from the end of the injection needle along the pen container 100, the end part of the limiting member 41 close to the end of the injection needle is provided with a second inserting part, the second inserting part is inserted into the annular groove 311, so that the injection member can only move along the axial direction of the pen container 100 close to the end of the injection needle, and cannot move away from the end of the needle in the axial direction of the barrel 100.
The injection device 300 further comprises a refill support 32 and a medicine bottle 33, the refill support 32 is fixedly arranged at the front end of the pen container 100, a pen cap 200 is sleeved on the refill support 32, the pen cap 200 is detachably and fixedly connected with the refill support 32 and can be detachably connected in a clamping mode, the medicine bottle 33 is arranged in the refill support 32, an injection plug 34 is arranged in the medicine bottle 33, a push sheet 314 is sleeved at the front end of the push rod 31, and the end face, close to the end of an injection needle, of the push sheet 314 is attached to the injection plug 34.
When the injection is performed, the push rod 31 is pushed along the axial direction of the pen container 100 and close to the injection needle end, and the push rod 31 pushes the injection plug 34 to move along the axial direction of the pen container 100 and close to the injection needle end, so that the medicine is pushed to the injection needle end, the injection function is better realized, the structure is simple, and the operation is convenient. The pushing plate 314 is engaged with the injection plug 34, so that the pushing force applied to the injection plug 34 is more uniform when the pushing rod 31 is pushed.
The limiting part 41 comprises a limiting sleeve 411 and a plurality of limiting clamping jaws 412 with certain elasticity, the limiting sleeve 411 is fixedly arranged in the pen container 100, the limiting sleeve 411 is sleeved on the push rod 31, the limiting clamping jaws 412 are fixedly arranged at one end of the limiting sleeve 411, the limiting clamping jaws 412 form a second insertion part, the limiting clamping jaws 412 are in insertion fit with the annular groove 311 and attached to the second inner side wall 313, and the limiting clamping jaws 412 are circumferentially arranged along the limiting sleeve 411.
A dose adjusting rod 423 is movably arranged in the pen container 100 along the axial direction of the pen container 100, the push rod 31 axially penetrates through the dose adjusting rod 423 and is in sliding fit with the dose adjusting rod 423, and the rear end of the dose adjusting rod 423 extends out of the pen container 100.
The dosage adjusting member 42 comprises a dosage adjusting cylinder 421 and a plurality of dosage claws 422 with certain elasticity, the dosage adjusting cylinder 421 is sleeved on a guide driving section 4231 at the front end of the dosage adjusting rod 423, the dosage adjusting cylinder 421 is axially arranged in the pen container 100 along the pen container 100, the dosage adjusting cylinder 421 is movably arranged on the dosage adjusting rod 423 along the axial direction of the pen container 100, the sliding part 44 is a convex block arranged on the outer side wall of the dosage adjusting cylinder 421, the convex block is in sliding fit with the dosage adjusting groove 43, and the dosage adjusting cylinder 421 is sleeved on the push rod 31.
Referring to fig. 11 and 12, a guiding driving section 4231 is fixedly connected to the dose adjusting lever 423 near the injection needle end, a driving block 4232 and a driving rib 4235 are fixed on an outer circumferential surface of the guiding driving section 4231, the driving rib 4235 is located at a position of the driving block 4232 far away from the injection needle end, the driving block 4232 and the driving rib 4235 protrude outward along a radial direction of the dose adjusting lever 423, and the driving rib 4235 is an elastic member; a guide groove 4211 is arranged on the circumferential surface of the dose adjusting cylinder 421; the maximum outward radial projection of the driving block 4232 along the dose adjusting rod 423 is greater than the inner diameter of the dose adjusting cylinder 421 and does not exceed the outer diameter of the dose adjusting cylinder 421, and the maximum outward radial projection of the driving rib 4235 along the dose adjusting rod 423 is lower than the maximum outward radial projection of the driving block 4232 along the dose adjusting rod 423 and is slightly greater than the inner diameter of the dose adjusting cylinder 421; the driver block 4232 and the driver rib 4235 are slidably fitted in the guide groove 4211 in the axial direction of the dose adjustment cylinder 421.
The dosage clamping jaws 422 are fixedly arranged at one end of the dosage adjusting cylinder 421, the dosage clamping jaws 422 are formed into a first insertion part, the dosage clamping jaws 422 are in insertion fit with the annular groove 311 and attached to the second inner side wall 313, and the dosage clamping jaws 422 are circumferentially arranged along the dosage adjusting cylinder 421.
A jaw connector 46 is arranged in the pen container 100, the jaw connector 46 is fixed with the pen container 100 in a clamping fit mode, a limiting sleeve 411 is fixed with the jaw connector 46 in a clamping fit mode, the jaw connector 46 is sleeved on the limiting sleeve 411, and the jaw connector 46 is fixedly connected with the pen core support 32. The jaw joint 46 facilitates the fixed mounting of the spacing sleeve 411 on the barrel 100.
The claw joint 46 is provided with a clamping block 461, the side surface of the pen container 100 is provided with a clamping hole 462, the clamping block 461 is inserted into the clamping hole 462, and the claw joint 46 is abutted against the inner wall of the pen container 100.
Referring to fig. 8 to 10, a first limiting piece 463 is fixedly connected to the end surface of the jaw joint 46 far away from the injection needle end, the first limiting piece 463 extends from the outer side wall of the jaw joint 46 to the inner side wall of the jaw joint 46 and protrudes out of the inner side wall of the jaw joint 46, the end surface of the first limiting piece 463 close to the injection needle end is abutted against the end surface of the limiting sleeve 411 far away from the injection needle end, a limiting sleeve 411 is axially arranged on the inner side wall of the jaw joint 46, a fixing piece 464 with certain elasticity is fixedly connected to the side wall of the limiting sleeve 411, the fixing piece 464 is axially inserted into the limiting sleeve 411 and is abutted against the inner side wall of the limiting sleeve 411, a second limiting piece 465 is arranged on the end surface of the fixing piece 464 far away from the injection needle end, one end of the fixing piece 464 close to the injection needle end is abutted against the medicine bottle 33, and the second limiting piece 465 extends from the inner side wall of the jaw joint 46 to the outer side wall of the jaw joint 46, the end surface of the second limiting piece 465 close to the needle end is against the end surface of the claw joint 46 far away from the needle end.
The working principle is as follows: when the dosage is required to be adjusted, the dosage adjusting rod 423 is rotated, the dosage adjusting rod 423 drives the adjusting cylinder to rotate, so that the convex block rotates to the dosage adjusting groove 43 of the required dosage, and the end surface of the driving rib 4235 far away from the end of the injection needle is abutted against the end surface 4212 of the guide groove 4211 of the dosage adjusting cylinder 421 far away from the end of the injection needle; the dose adjusting rod 423 is pulled along the direction of the pen container 100 axially far away from the end of the injection needle, and the dose adjusting rod 423 drives the dose adjusting container 421 to move towards the direction far away from the end of the injection needle under the drive of the driving rib 4235; when the dose adjusting barrel 421 moves to the stop 431 of the dose adjusting groove 43, which is axially arranged on the inner side wall of the barrel 100, of the sliding part 44 on the dose adjusting barrel 421 and the stop 431, which is away from the injection needle end, the dose adjusting barrel 421 is stopped by the stop 431, and at this time, the limiting claw 412 is in insertion fit with the annular groove 311 and abuts against the first inner side wall 312 to limit the push rod 31, so that the push rod 31 cannot move axially away from the injection needle end. Meanwhile, the dose claws 422 are abutted against the second inner side surface of the annular groove 311, so that the dose claws 422 move outwards along the radial direction of the push rod 31, and the dose claws 422 are conveniently inserted into the adjacent annular grooves 311, at the moment, the dose claws 422 crawl on the push rod 31 along the axial direction of the push rod 31 away from the injection needle end, so that the distance between the dose claws 422 and the limiting sleeve 411 is adjusted, when the convex block slides to one end of the dose adjusting groove 43 away from the injection needle end along the dose adjusting groove 43, the convex block cannot slide continuously, the injection dose of the injection pen is limited, and the dose adjustment is completed.
The dose adjusting rod 423 is pulled continuously in the direction of the pen container 100 axially far away from the end of the injection needle, the driving rib 4235 is pressed by the inner side wall of the dose adjusting cylinder 421 and then contracts inwards in the radial direction of the dose adjusting rod 423, the dose adjusting rod 423 moves continuously towards the direction far away from the end of the injection needle relative to the dose adjusting cylinder 421 until the abutting end surface 4233 of the driving block 4232 far away from the direction of the end of the injection needle abuts against the end surface 4212 of the guide groove 4211 of the dose adjusting cylinder 421 far away from the end of the injection needle.
When the injection is performed, the dose adjusting rod 423 is pushed in the direction of the pen container 100 axially approaching the end of the injection needle, the dose adjusting rod 423 moves towards the direction of the end of the injection needle relative to the dose adjusting cylinder 421 until the pushing end surface 4234 of the guiding and driving section 4231 in the direction of the end of the injection needle abuts against the bottom surface 4213 of the dose adjusting cylinder 421 in the direction of the end of the injection needle, at this time, the dose claw 422 abuts against the first inner side wall 312 of the annular groove 311, under the pushing force of the dose claw 422, the push rod 31 moves in the direction of the pen container 100 axially approaching the end of the injection needle, and the push rod 31 pushes the injection plug 34 in the direction of the pen container 100 axially approaching the end of the injection needle, so that the medicine is.
In the movement of the dose adjusting rod 423 relative to the dose adjusting cylinder 421 in the direction away from the needle end after the dose adjustment is completed, and in the movement of the dose adjusting rod 423 relative to the dose adjusting cylinder 421 in the direction close to the needle end before the injection, there is no axial relative movement between the dose pawl 422 and the push rod 31, so that the movement distance of the dose adjusting rod 423 is increased on the premise of not influencing the dose adjustment or the injection, which is beneficial to enhancing the hand feeling and the visual feeling of a user.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (9)
1. The utility model provides a dose adjustable liquid medicine feeding device, includes pen container (100), pen container (100) are provided with along the axial and hold chamber (11), the front end of pen container (100) is the injection end, its characterized in that: also comprises
An injection device (300), wherein the injection device (300) comprises an injection piece movably arranged in the accommodating cavity (11), and the injection piece is axially arranged along the pen container (100);
the adjusting assembly (400) comprises a limiting part (41) fixedly arranged in the accommodating cavity (11) and a dose adjusting part (42) movably arranged in the accommodating cavity (11), the inner side wall of the pen container (100) is provided with a plurality of dose adjusting grooves (43) along the axial direction, the length of each dose adjusting groove (43) is different, the dose adjusting part (42) is provided with a sliding part (44) in sliding fit with the dose adjusting groove (43), one end, close to the end of an injection needle, of each dose adjusting groove (43) is provided with a movable space (45) for the sliding part (44) to rotate along the central shaft of the pen container (100), one end, close to the end of the injection needle, of each dose adjusting groove (43) is communicated with the movable space (45), the limiting part (41) limits that the injection part can only move close to the end of the injection needle, and the moving direction of the limiting part (41) is along the axial direction of the pen container (100), the dose setting member (42) is limited to move relative to the injection member in a direction away from the end of the injection needle, and the direction of movement of the dose setting member (42) is in the axial direction of the barrel (100).
2. The adjustable-dose medical fluid feeding device according to claim 1, wherein: the injection piece is a push rod (31), and the push rod (31) is movably arranged along the axial direction of the pen container (100);
the injection device (300) further comprises:
the pen core support (32) is fixedly arranged at the front end of the pen container (100), a pen cap (200) is sleeved on the pen core support (32), and the pen cap (200) is detachably and fixedly connected with the pen core support (32);
the pen core support is characterized by comprising a medicine bottle (33), the medicine bottle (33) is arranged in the pen core support (32), an injection plug (34) is arranged in the medicine bottle (33), and the push rod (31) pushes the injection plug (34) to move close to the end of an injection needle along the axial direction of the pen container (100).
3. The adjustable-dose medical fluid feeding device according to claim 2, wherein: the injection needle is characterized in that an annular groove (311) is formed in the push rod (31) in the circumferential direction, a plurality of annular grooves (311) are axially formed in the push rod (31), each annular groove (311) is provided with two inner side walls which are respectively a first inner side wall (312) and a second inner side wall (313), the first inner side walls (312) are perpendicular to the central axis of the push rod (31), an included angle a is formed between the second inner side walls (313) and the first inner side walls (312), the included angle a is an acute angle, an elastic first insertion part is arranged at the end part, close to the injection needle end, of the dose adjusting part (42), the first insertion part is inserted into the annular groove (311), a second insertion part is arranged at the end part, close to the injection needle end, of the limiting part (41), and the second insertion part is inserted into the annular groove (311).
4. A adjustable-dose medical fluid delivery device as defined in claim 3, wherein: the locating part (41) comprises a limiting sleeve (411), the limiting sleeve (411) is fixedly arranged in the pen container (100), the limiting sleeve (411) is sleeved on the push rod (31), the locating part (41) further comprises a plurality of limiting clamping jaws (412) with certain elasticity, the limiting clamping jaws (412) are fixedly connected to one axial end of the limiting sleeve (411), the limiting clamping jaws (412) are circumferentially arranged along the limiting sleeve (411), the limiting clamping jaws (412) are formed into the second insertion part, and the limiting clamping jaws (412) are inserted into the annular groove (311) and are fitted with the second inner side wall (313).
5. The adjustable-dose medical fluid feeding device according to claim 4, wherein: a dose adjusting rod (423) is movably arranged in the pen container (100) along the axial direction of the pen container (100), the push rod (31) axially penetrates through the dose adjusting rod (423) and is in sliding fit with the dose adjusting rod (423), and the rear end of the dose adjusting rod (423) extends out of the pen container (100);
the dose adjuster (42) comprises:
the dosage adjusting cylinder (421), the dosage adjusting cylinder (421) is arranged in the pen container (100) along the axial direction of the pen container (100), the dosage adjusting cylinder (421) is arranged at the front end of the dosage adjusting rod (423), the dosage adjusting cylinder (421) is sleeved on the push rod (31), the sliding part (44) is a bump arranged on the outer side wall of the dosage adjusting cylinder (421), and the bump is in sliding fit with the dosage adjusting groove (43);
the dosage clamping jaws (422) are fixedly connected to one axial end of the dosage adjusting barrel (421), the dosage clamping jaws (422) have certain elasticity, the dosage clamping jaws (422) form the first insertion part, the dosage clamping jaws (422) are in insertion fit with the annular groove (311) and attached to the second inner side wall (313), and the dosage clamping jaws (422) are arranged along the circumferential direction of the dosage adjusting barrel (421).
6. The adjustable-dose medical fluid feeding device according to claim 5, wherein: be provided with jaw joint (46) in pen container (100), jaw joint (46) are fixed with pen container (100) joint cooperation, spacing sleeve (411) are fixed with jaw joint (46) joint cooperation, jaw joint (46) suit is on spacing sleeve (411), jaw joint (46) and refill support (32) fixed connection.
7. The adjustable-dose medical fluid feeding device according to claim 6, wherein: the clamping jaw connector (46) is provided with a clamping block (461), the side face of the pen container (100) is provided with a clamping hole (462), the clamping block (461) is inserted into the clamping hole (462), and the clamping jaw connector (46) is abutted to the inner wall of the pen container (100).
8. The adjustable-dose medical fluid feeding device according to claim 6, wherein: the end face, far away from the injection needle end, of the jaw joint (46) is fixedly connected with a first limiting piece (463), the first limiting piece (463) extends from the outer side wall of the jaw joint (46) to the inner side wall of the jaw joint (46) and protrudes out of the inner side wall of the jaw joint (46), the end face, close to the injection needle end, of the first limiting piece (463) is abutted to the end face, far away from the injection needle end, of the limiting sleeve (411), the side wall of the limiting sleeve (411) is fixedly connected with a fixing piece (464) with certain elasticity, the fixing piece (464) is axially inserted into the limiting sleeve (411) along the limiting sleeve (411) and is attached to the inner side wall of the limiting sleeve (411), the end face, far away from the injection needle end, of the fixing piece (464) is provided with a second limiting piece (465), and the second limiting piece (465) extends from the inner side wall of the jaw joint (46) to the outer side wall of the jaw joint (46), the end face of the second limiting sheet (465), which is close to the end of the injection needle, is abutted against the end face of the claw joint (46), which is far away from the end of the injection needle.
9. The adjustable-dose medical fluid feeding device according to claim 2, wherein: the front end of the push rod (31) is sleeved with a push sheet (314), and the end surface of the push sheet (314) close to the end of the injection needle is attached to the injection plug (34).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110528528.6A CN113230492B (en) | 2021-05-14 | 2021-05-14 | Dosage-adjustable liquid medicine feeding device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110528528.6A CN113230492B (en) | 2021-05-14 | 2021-05-14 | Dosage-adjustable liquid medicine feeding device |
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| CN113230492B CN113230492B (en) | 2023-05-05 |
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| CN113230492B (en) | 2023-05-05 |
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