CN110786984B - Special silicone oil-free injector for ophthalmology - Google Patents
Special silicone oil-free injector for ophthalmology Download PDFInfo
- Publication number
- CN110786984B CN110786984B CN201911066362.XA CN201911066362A CN110786984B CN 110786984 B CN110786984 B CN 110786984B CN 201911066362 A CN201911066362 A CN 201911066362A CN 110786984 B CN110786984 B CN 110786984B
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- Prior art keywords
- core rod
- outer sleeve
- section
- front section
- core
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- 229920001296 polysiloxane Polymers 0.000 title claims description 7
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 14
- 230000000996 additive effect Effects 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 229920002545 silicone oil Polymers 0.000 claims abstract description 6
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims abstract description 4
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims abstract description 4
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims abstract description 4
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 2
- 238000003825 pressing Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a special silicone-oil-free injector for ophthalmology, which comprises an outer sleeve and a core rod inserted in the outer sleeve, wherein the core rod is divided into two sections, namely a core rod front section and a core rod rear section, and the rear end of the core rod front section is connected with the front end of the core rod rear section through a T-shaped tongue-and-groove structure; the elastic modulus of the front section of the core rod is less than or equal to 600MPa, and the elastic modulus of the rear section of the core rod is more than or equal to 1 Gpa; the material used in the front section of the core rod contains an additive, the additive adopts erucamide and/or oleamide, and the mass of the additive accounts for 0.1-1% of the total mass of the front section of the core rod; the front end of the front section of the core rod is provided with an annular bulge, and the annular bulge and the core rod are coaxially arranged. The ophthalmic special silicone-oil-free injector disclosed by the invention has the advantages of no liquid residue during liquid injection, no silicone oil, convenience in processing and use, high safety and high reliability.
Description
Technical Field
The invention relates to a special silicone oil-free injector for ophthalmology, and belongs to the field of medical instruments.
Background
The disposable ophthalmic injector in the market at present has two kinds of sealing between the core rod and the outer sleeve, wherein the core rod is made of plastic materials and matched with the outer sleeve, and the core rod is provided with or combined with an injection molding annular or sheet rubber sealing ring and matched with the outer sleeve. The former has poor sealing and sliding performance due to the matching of plastics and plastics; the latter is not simple enough and the production process is complicated. After the liquid is injected into the syringe, the liquid can be remained in the syringe jacket and the conical head with the two sealing forms, and the low-residue syringe on the market can only reduce the residue but cannot completely eliminate the residue. The ophthalmic injection has small dosage and high price, and ophthalmic treatment is more sensitive to silicon oil in liquid medicine, so that an injector which has a simple structure, does not have residues and does not contain silicon oil is needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the special silicone-oil-free injector for ophthalmology, which has good sliding performance and sealing performance, no liquid residue and no silicone oil when injecting liquid. Convenient processing and use, high safety and reliability.
The technical scheme for realizing the purpose is as follows: a silicone oil-free injector special for ophthalmology comprises an outer sleeve and a core rod inserted in the outer sleeve, wherein the core rod is divided into two sections, namely a core rod front section and a core rod rear section, and the rear end of the core rod front section is connected with the front end of the core rod rear section through a T-shaped tongue-and-groove structure;
the elastic modulus of the front section of the core rod is less than or equal to 600MPa, and the elastic modulus of the rear section of the core rod is more than or equal to 1 Gpa;
the material used in the front section of the core rod contains an additive, the additive adopts erucamide and/or oleamide, and the mass of the additive accounts for 0.1-1% of the total mass of the front section of the core rod;
the front end of the front section of the core rod is provided with an annular bulge, and the annular bulge and the core rod are coaxially arranged;
a pressing hand for pushing and pulling the core bar is arranged at the rear end of the rear section of the core bar, a clamping ring is arranged on the rear section of the core bar, and the clamping ring is arranged close to the pressing hand;
the front end of the outer sleeve is provided with a conical head, and the rear end of the outer sleeve is provided with a turned edge;
the core bar is inserted into the outer sleeve, the retainer ring and the press hand are positioned outside the outer sleeve, and the annular bulge is connected with the inner wall surface of the outer sleeve in an interference fit manner;
and when the core rod is pushed forwards until the clamping ring is contacted with the crimping edge, the injection is stopped, and the front part of the annular protrusion extends out of the outer sleeve.
The special silicone-oil-free injector for ophthalmology comprises a T-shaped tenon and a T-shaped hole matched with the T-shaped tenon, wherein the vertical part of the T-shaped tenon is arranged at the rear end of the front section of the core rod, and the direction of the transverse part of the T-shaped tenon is parallel to the radial direction of the core rod; the T-shaped hole is formed in the front end of the rear section of the core rod, and the transverse part of the T-shaped hole penetrates through the rear section of the core rod from the radial direction; the T-shaped tenon is clamped in the T-shaped hole.
The special non-silicone oil injector for ophthalmology department, wherein the mass of the additive accounts for 0.28-0.35% of the total mass of the front section of the core rod.
In the above silicone-oil-free injector special for ophthalmology, the core rod is molded by injection twice, the rear section of the core rod is firstly molded by injection, and then the front section of the core rod is molded by injection.
The silicone-oil-free injector special for ophthalmology department is characterized in that the inner diameter of the outer sleeve is the same as that of the conical head.
The silicone-oil-free injector special for ophthalmology department is characterized in that the distance from the retainer ring to the front end face of the core rod is 1-3 mm larger than the length of the outer sleeve.
The silicone-oil-free injector special for ophthalmology department, wherein the outer diameter of the clamping ring is larger than the diameter of the core rod, and the diameter of the press hand is larger than the outer diameter of the clamping ring.
According to the special silicone-oil-free injector for ophthalmology, the core rod can be pushed out of the conical head hole along the inner wall of the outer sleeve through the conical head, so that no liquid residue is completely left in the injector, and the liquid residue in a needle base or a female joint connected with the conical head is reduced; silicon oil is not contained, and the safety is high; the front section of the core rod and the outer sleeve form sealing, so that the processing is convenient; the matching surface is few, and the reliability is high.
Drawings
FIG. 1 is a structural diagram of a silicone-oil-free injector for ophthalmology according to the present invention;
FIG. 2 is a front view of the core rod of the ophthalmic dedicated silicone-free injector of the present invention;
FIG. 3 is a schematic connection diagram of a front section of the core rod and a rear section of the core rod;
FIG. 4 is a diagram showing a state of separation of a front core rod section and a rear core rod section;
FIG. 5 is a vertical cross-sectional view of the core rod of the ophthalmic non-silicone oil syringe of the present invention;
FIG. 6 is a partial enlarged view of portion A of FIG. 5;
FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;
FIG. 8 is a partial enlarged view of portion B of FIG. 5;
FIG. 9 is a front view of the outer casing of the ophthalmic dedicated silicone-free injector of the present invention;
FIG. 10 is a cross-sectional view taken along line D-D of FIG. 9;
fig. 11 is a top view of the ophthalmic dedicated silicone-free injector of the present invention.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description is given with reference to the accompanying drawings:
referring to fig. 1 to 11, in the preferred embodiment of the present invention, a silicone oil-free injector specially used for ophthalmology includes an outer sleeve 1 and a core rod 2 inserted therein, the core rod 2 is divided into two sections, which are a core rod front section 21 and a core rod rear section 22, respectively, and the rear end of the core rod front section 21 and the front end of the core rod rear section 22 are connected together by a radial dovetail mortise structure 3.
The elastic modulus of the front section 21 of the core rod is less than or equal to 600MPa, and the elastic modulus of the rear section 22 of the core rod is more than or equal to 1 Gpa; the material used in the front section 21 of the core rod contains an additive, the additive adopts erucamide and/or oleamide, and the mass of the additive accounts for 0.3% of the total mass of the front section of the core rod. The material used for the core rod front section 21 does not contain silicone oil.
Referring to fig. 3 and 4, the T-shaped mortise structure 3 includes a T-shaped tenon 31 and a T-shaped hole 32 matched with the T-shaped tenon, a vertical portion of the T-shaped tenon 31 is disposed at a rear end of the core rod front section 21, and a direction of a transverse portion of the T-shaped tenon 31 is parallel to a radial direction of the core rod 2; the T-shaped hole 32 is formed in the front end of the core rod rear section 22, and the transverse part of the T-shaped hole 32 penetrates through the core rod rear section from the radial direction; the T-shaped tenon 31 is snapped in the T-shaped hole 32.
The front end of the front core rod section 21 is provided with an annular bulge 211, and the annular bulge 211 is coaxial with the core rod 2; the rear end of the core rod rear section 22 is provided with a press hand 222 for pushing and pulling the core rod, the core rod rear section 22 is provided with a clamping ring 221, and the clamping ring 221 is arranged close to the press hand 222.
Referring to fig. 9, 10 and 11, the front end of the outer sleeve 1 is provided with a conical head 11, and the rear end is provided with a curled edge 12; the cone head 11 is a locking or non-locking cone joint, and the inner diameter of the outer sleeve is the same as that of the cone head without considering draft angle.
Referring to fig. 1, the core rod 2 is inserted into the outer sleeve 1, the collar 221 and the pressing hand 222 are located outside the outer sleeve 1, and the annular protrusion 211 is connected with the inner wall surface of the outer sleeve 1 in an interference fit manner to play a sealing role; the annular protrusion 211 can continuously slide along the inner wall of the outer sleeve and the inner wall of the conical head. The injection is stopped by pushing the core rod 2 forward until the collar 221 comes into contact with the bead 12, and the front part of the annular projection 211 now protrudes outside the outer jacket 1.
The front core rod section 21 is made of thermoplastic polyurethane elastomer rubber, and the material of the shaft rod 31 and the two dovetails 32 thereon is the same as that of the front core rod section 21. The core rod rear section 22 is made of acrylonitrile-butadiene-styrene plastic. The front core rod section 21 and the rear core rod section 22 are made of different materials and are processed into a whole. The core rod 2 is formed by secondary injection molding, the core rod rear section 22 is firstly injected, then the core rod rear section 22 is placed in a mold, and then the core rod front section 21 is injected. The core rod front section 21 and the core rod rear section 22 are connected together through the radial dovetail groove structure 3, and the connection is firm.
The distance from the collar 221 to the front end face of the core rod 2 is 1.5mm greater than the length of the outer jacket 1, and this structure allows the front portion of the annular projection 211 to protrude beyond the conical head 11 when the core rod 2 is pushed to a stop along the inner wall of the outer jacket 1. The outer diameter of the collar 221 is larger than the diameter of the core rod 2, and the collar 221 plays a limiting role and prevents the core rod 2 from further moving after the front part of the annular protrusion 211 pushes out the conical head 11. The length of the front section 21 of the core rod, excluding the shaft lever and the dovetail joint, is 9-15 mm. The diameter of the pressing hand 222 is larger than the outer diameter of the clamping ring 221, so that the pressing hand can be pushed and pulled conveniently.
According to the silicone oil-free injector special for ophthalmology, the annular bulge 211 is connected with the inner wall surface of the outer sleeve 1 in an interference fit manner to play a sealing role, and in use, the annular bulge 211 can be pushed out of an inner hole of a conical head along the inner wall of the outer sleeve 1 through the conical head 11, so that no liquid residue is completely left in the injector, and the liquid residue in a needle base or a female joint connected with the conical head 11 is reduced; the front section 21 of the core rod and the outer sleeve 1 form sealing, so that the processing is convenient; the matching surface is few, and the reliability is high.
The silicone-oil-free injector special for ophthalmology of the invention uses different materials for the front section of the core rod and the rear section of the core rod, and the connecting structure of the front section of the core rod and the rear section of the core rod is a radial tongue-and-groove structure, thus having the advantages of simple structure, convenient processing, low cost and high reliability. When the injection is finished, a part of the annular bulge of the core rod is pushed out of the outer sleeve, so that no liquid is left after the injection.
In conclusion, the ophthalmic special silicone-oil-free injector has the advantages of simple structure, convenience in processing and low cost, can realize that no liquid medicine residue exists in a syringe after injection, and can reduce the liquid medicine residue in a connected injection needle seat or a joint.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (5)
1. A silicone oil-free injector special for ophthalmology comprises an outer sleeve and a core rod inserted in the outer sleeve, and is characterized in that the core rod is divided into two sections, namely a core rod front section and a core rod rear section, and the rear end of the core rod front section is connected with the front end of the core rod rear section through a T-shaped tongue-and-groove structure;
the elastic modulus of the front section of the core rod is less than or equal to 600MPa, and the elastic modulus of the rear section of the core rod is more than or equal to 1 Gpa;
the front section of the core rod is made of thermoplastic polyurethane elastomer rubber, the rear section of the core rod is made of acrylonitrile-butadiene-styrene plastic, and the front section of the core rod and the rear section of the core rod are processed into a whole by adopting different materials; the core bar is molded by secondary injection molding, the rear section of the core bar is firstly injected and then the front section of the core bar is injected;
the material used in the front section of the core rod contains an additive, the additive adopts erucamide and/or oleamide, and the mass of the additive accounts for 0.1-1% of the total mass of the front section of the core rod; the material used in the front section of the core rod does not contain silicone oil;
the front end of the front section of the core rod is provided with an annular bulge, and the annular bulge and the core rod are coaxially arranged;
a press hand used for pushing and pulling the core bar is arranged at the rear end of the rear section of the core bar, a clamping ring is arranged on the rear section of the core bar, and the clamping ring is arranged close to the press hand;
the front end of the outer sleeve is provided with a conical head, and the rear end of the outer sleeve is provided with a turned edge;
the core bar is inserted into the outer sleeve, the clamping ring and the press hand are positioned outside the outer sleeve, the annular bulge is in interference fit connection with the inner wall surface of the outer sleeve, and the annular bulge can be pushed out of the inner hole of the conical head through the conical head along the inner wall of the outer sleeve;
when the core rod is pushed forwards until the clamping ring is contacted with the curled edge, the injection is stopped, and at the moment, the front part of the annular bulge extends out of the outer sleeve, so that no liquid residue exists in the injector completely;
the front section of the core rod and the outer sleeve form sealing;
the T-shaped mortise structure comprises a T-shaped tenon and a T-shaped hole matched with the T-shaped tenon, the vertical part of the T-shaped tenon is arranged at the rear end of the front section of the core rod, and the direction of the transverse part of the T-shaped tenon is parallel to the radial direction of the core rod; the T-shaped hole is formed in the front end of the rear section of the core rod, and the transverse part of the T-shaped hole penetrates through the rear section of the core rod from the radial direction; the T-shaped tenon is clamped in the T-shaped hole.
2. The silicone-oil-free injector special for the ophthalmology of claim 1, wherein the mass of the additive accounts for 0.28-0.35% of the total mass of the front section of the core rod.
3. The silicone-free injector special for ophthalmology of claim 1, wherein the inner diameter of the outer sleeve is the same as the inner diameter of the conical head.
4. The silicone-oil-free injector special for the ophthalmology of claim 1, wherein the distance from the collar to the front end face of the core rod is 1mm to 3mm greater than the length of the outer sleeve.
5. The silicone-free ophthalmic syringe of claim 1, wherein the collar has an outer diameter greater than the diameter of the plunger, and the knob has a diameter greater than the outer diameter of the collar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911066362.XA CN110786984B (en) | 2019-11-04 | 2019-11-04 | Special silicone oil-free injector for ophthalmology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911066362.XA CN110786984B (en) | 2019-11-04 | 2019-11-04 | Special silicone oil-free injector for ophthalmology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110786984A CN110786984A (en) | 2020-02-14 |
| CN110786984B true CN110786984B (en) | 2022-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911066362.XA Active CN110786984B (en) | 2019-11-04 | 2019-11-04 | Special silicone oil-free injector for ophthalmology |
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| Country | Link |
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| CN (1) | CN110786984B (en) |
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| AR240257A1 (en) * | 1989-03-22 | 1990-03-30 | Arcusin Carlos E | SELF-DISPOSABLE SYRINGE. |
| JP2792339B2 (en) * | 1992-05-18 | 1998-09-03 | 株式会社ニッショー | Anti-reuse syringe |
| CN2379141Y (en) * | 1998-09-24 | 2000-05-24 | 普宁市罗斯医用器材有限公司 | Disposable bacterial self-destroyed type syringe |
| CN1552470A (en) * | 2003-12-18 | 2004-12-08 | 陈嘉农 | Self-locking and self-destruction safety syringe |
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| CN201220025Y (en) * | 2008-07-16 | 2009-04-15 | 欧特（中国）医疗科技有限公司 | Safe self-destroyed syringe with large force for preventing retraction of needle |
| CN201807029U (en) * | 2010-09-16 | 2011-04-27 | 冯忠 | Self-destruct syringe with backstop device |
| CN102397606A (en) * | 2010-09-16 | 2012-04-04 | 无锡市宇寿医疗器械股份有限公司 | Self-destroying injector with retaining device |
| ES2424124T3 (en) * | 2010-10-01 | 2013-09-27 | Geistlich Pharma Ag | Device for the application of bone substitute material |
| CN102526845A (en) * | 2010-12-13 | 2012-07-04 | 江苏亿乐医疗用品有限公司 | Safety self-destruction injector |
| CN202015392U (en) * | 2010-12-15 | 2011-10-26 | 成都市新津事丰医疗器械有限公司 | Disposable syringe and core rod |
| CN108744165B (en) * | 2011-03-28 | 2021-02-19 | 贝克顿·迪金森公司 | Plastic stopper |
| CN103083764A (en) * | 2011-11-02 | 2013-05-08 | 马雪平 | Core pin structure for safe auto-disable syringe |
| CN102525488B (en) * | 2011-12-01 | 2013-09-25 | 上海金塔医用器材有限公司 | Disposable sterile retraction safety blood sampling needle |
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| CN204170219U (en) * | 2014-10-09 | 2015-02-25 | 安徽省天康医疗用品有限公司 | A kind of highly-effective low-residue self-destruction syringe |
| CN204307157U (en) * | 2014-11-18 | 2015-05-06 | 深圳市安特高科实业有限公司 | Piston component and syringe |
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2019
- 2019-11-04 CN CN201911066362.XA patent/CN110786984B/en active Active
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