CN104083818B - A kind of intravenous injector and intravenous injector syringe needle - Google Patents
A kind of intravenous injector and intravenous injector syringe needle Download PDFInfo
- Publication number
- CN104083818B CN104083818B CN201410348421.3A CN201410348421A CN104083818B CN 104083818 B CN104083818 B CN 104083818B CN 201410348421 A CN201410348421 A CN 201410348421A CN 104083818 B CN104083818 B CN 104083818B
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- China
- Prior art keywords
- bell
- liquid
- head body
- spigot joint
- syringe
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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
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
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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 discloses a kind of intravenous injector and intravenous injector syringe needle, described syringe needle is made up of the bell and spigot joint of a plastic material and the needle head body of a metal material being fixedly connected on bell and spigot joint end, in bell and spigot joint, the end of close needle head body forms the valve seat of a semi-spherical shape, is provided with a spherical valve ball in valve seat；Described valve seat forms the liquid in-out mouth connected with needle head body near the bottom of needle head body, forms a step between valve seat end and bell and spigot joint inwall；Being provided with a back-up ring on described step, the outer wall of back-up ring is connected with the inwall interference fit of bell and spigot joint, and the inwall of back-up ring forms multiple in order to stop the interior projection that valve ball is deviate from.When using this syringe extraction liquid, speed is not affected by valve ball, when using this syringe to infuse.Liquid only flows through from liquid seam excessively, and flow velocity slower patient will not feel well.
Description
Technical field
The invention belongs to medicine equipment, be specifically related to a kind of intravenous injector.
Background technology
Intravenous injection is a kind of therapy, i.e. the liquid substances such as blood, liquid, nutrient solution is injected directly in vein;The intravenous injection of transience is many is directly injected into vein with syringe, the most common " having an injection "；If the intravenous liquid of transience is more, medical personnel often accelerate injection speed, the situations such as some medical personnel's hand shaking also result in moment injection speed, but injection speed is too fast, to heart failure and pulmonary edema, particularly patient's Yi Fasheng infusion reaction of children's, old age, thoracic injury, heart failure, can become lethal severe reaction time serious.
Summary of the invention
The technical problem to be solved is: the deficiency existed for prior art, it is provided that a kind of simple in construction, it is possible to normally extract liquid, can slow down the intravenous injector of injection speed simultaneously.
For realizing the purpose of the present invention, it is achieved by the following technical solutions: a kind of intravenous injector, include syringe, piston rod and syringe needle, described piston rod end connects the piston coordinated with described syringe, described syringe needle coupling is socketed on the syringe needle joint of syringe front end, described syringe needle is made up of the bell and spigot joint of a plastic material and the needle head body of a metal material being fixedly connected on bell and spigot joint end, in described bell and spigot joint, the end of close needle head body forms the valve seat of a semi-spherical shape, is provided with a spherical valve ball in valve seat；Described valve seat forms the liquid in-out mouth connected with needle head body near the bottom of needle head body, forms a step between valve seat end and bell and spigot joint inwall；Being provided with a back-up ring on described step, the outer wall of back-up ring is connected with the inwall interference fit of bell and spigot joint, and the inwall of back-up ring forms multiple in order to stop the interior projection that valve ball is deviate from；The liquid of crossing that described valve base inner wall face forms within a connection liquid in-out mouth and bell and spigot joint stitches；Residing for a diameter of valve seat of described valve ball the 4/5 of spherical diameter；The end of each described interior projection one with on the circumference of back-up ring outer wall concentric, and the 3/4 of a diameter of valve ball diameter of the circumference residing for end of described interior projection；The 1/5-1/3 that cross-sectional area is needle head body internal channel cross-sectional area of described liquid in-out mouth.
The present invention also provides for a kind of intravenous injector syringe needle, described syringe needle is made up of the bell and spigot joint of a plastic material and the needle head body of a metal material being fixedly connected on bell and spigot joint end, in described bell and spigot joint, the end of close needle head body forms the valve seat of a semi-spherical shape, is provided with a spherical valve ball in valve seat；Described valve seat forms the liquid in-out mouth connected with needle head body near the bottom of needle head body, forms a step between valve seat end and bell and spigot joint inwall；Being provided with a back-up ring on described step, the outer wall of back-up ring is connected with the inwall interference fit of bell and spigot joint, and the inwall of back-up ring forms multiple in order to stop the interior projection that valve ball is deviate from；The liquid of crossing that described valve base inner wall face forms within a connection liquid in-out mouth and bell and spigot joint stitches；Residing for a diameter of valve seat of described valve ball the 4/5 of spherical diameter；The end of each described interior projection one with on the circumference of back-up ring outer wall concentric, and the 3/4 of a diameter of valve ball diameter of circumference residing for the end of described interior projection；The 1/5-1/3 that cross-sectional area is needle head body internal channel cross-sectional area of described liquid in-out mouth.
Compared with prior art, the invention has the beneficial effects as follows: when using this syringe extraction liquid, liquid enters from needle head body, finally flow in syringe through valve seat and bell and spigot joint, under liquid promotes, valve ball is against on the interior projection of back-up ring, and liquid flows through from the breach between interior projection and valve ball, and so speed of extraction liquid is not affected by valve ball.When infusing, piston promotes the liquid in syringe to flow to needle head body, and liquid, through valve seat, can promote valve ball to move to needle head body direction, thus valve ball can block liquid in-out mouth, and liquid can only flow into needle head body by the liquid seam of crossing from valve seat.The described 1/5-1/3 that cross-sectional area is needle head body internal channel cross-sectional area crossing liquid seam, so bigger when trying hard to recommend dynamic piston rod when using, the liquid speed flowed out from needle head body also can keep less flow velocity, the too fast patient of making of transfusion speed will be caused to be sick in the stomach because of the power inequality of making or heart is uncomfortable etc..Residing for a diameter of valve seat of described valve ball the 4/5 of spherical diameter, it is ensured that in infusion process, valve ball can stably block liquid in-out mouth, liquid is made the most only to pass through from crossing liquid seam.The 3/4 of a diameter of valve ball diameter of circumference residing for described interior projection, on the one hand ensures that valve ball is not deviate from from back-up ring direction, on the other hand ensures that the breach between valve ball and interior projection keeps stable bore, it is ensured that the speed of extraction liquid.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of syringe.
Fig. 2 is the sectional structure schematic diagram of syringe needle.
1, syringe；11, syringe needle joint；2, piston rod；3, syringe needle；31, bell and spigot joint；32, valve seat；33, needle head body；34, back-up ring；341, interior projection；35, valve ball；36, liquid seam is crossed；37, liquid in-out mouth.
Detailed description of the invention
Below according to accompanying drawing, the detailed description of the invention of the present invention is made a detailed explanation.
Embodiment 1
According to Fig. 1 to shown in 2, a kind of intravenous injector described in the present embodiment, include syringe 1, piston rod 2 and syringe needle, described piston rod end connects the piston coordinated with described syringe, described syringe needle coupling is socketed on the syringe needle joint 11 of syringe front end, described syringe needle 3 is made up of the bell and spigot joint 31 of a plastic material and the needle head body 33 of a metal material being fixedly connected on bell and spigot joint end, in described bell and spigot joint, the end of close needle head body forms the valve seat 32 of a semi-spherical shape, is provided with a spherical valve ball 35 in valve seat；Described valve seat forms the liquid in-out mouth 37 connected with needle head body near the bottom of needle head body, forms a step between valve seat end and bell and spigot joint inwall；Being provided with a back-up ring 34 on described step, the outer wall of back-up ring is connected with the inwall interference fit of bell and spigot joint, and the inwall of back-up ring forms multiple in order to stop the interior projection 341 that valve ball is deviate from；The liquid of crossing that described valve base inner wall face forms within a connection liquid in-out mouth and bell and spigot joint stitches 36；Residing for a diameter of valve seat of described valve ball the 4/5 of spherical diameter；The end of each described interior projection one with on the circumference of back-up ring outer wall concentric, and the 3/4 of a diameter of valve ball diameter of circumference residing for the end of described interior projection；The 1/5-1/3 that cross-sectional area is needle head body internal channel cross-sectional area of described liquid in-out mouth.
When using this syringe extraction liquid, liquid enters from needle head body, finally flows in syringe through valve seat and bell and spigot joint, under liquid promotes, valve ball is against on the interior projection of back-up ring, and liquid flows through from the breach between interior projection and valve ball, and so speed of extraction liquid is not affected by valve ball.When infusing, piston promotes the liquid in syringe to flow to needle head body, and liquid, through valve seat, can promote valve ball to move to needle head body direction, thus valve ball can block liquid in-out mouth, and liquid can only flow into needle head body by the liquid seam of crossing from valve seat.The described 1/5-1/3 that cross-sectional area is needle head body internal channel cross-sectional area crossing liquid seam, so bigger when trying hard to recommend dynamic piston rod when using, the liquid speed flowed out from needle head body also can keep less flow velocity, the too fast patient of making of transfusion speed will be caused to be sick in the stomach because of the power inequality of making or heart is uncomfortable etc..Residing for a diameter of valve seat of described valve ball the 4/5 of spherical diameter, it is ensured that in infusion process, valve ball can stably block liquid in-out mouth, liquid is made the most only to pass through from crossing liquid seam.The 3/4 of a diameter of valve ball diameter of circumference residing for described interior projection, on the one hand ensures that valve ball is not deviate from from back-up ring direction, on the other hand ensures that the breach between valve ball and interior projection keeps stable bore, it is ensured that the speed of extraction liquid.Described back-up ring installs in syringe needle before injector package in advance.After described syringe needle is received on syringe needle joint by bell and spigot joint set, back-up ring is held out against by the end of syringe needle joint, back-up ring is entirely limited and will not drop out between syringe needle fitting end and valve seat, need not use glue or alternate manner to be fixed between back-up ring and bell and spigot joint, easy to assembly.
Embodiment 2
According to Fig. 1 to shown in 2, a kind of intravenous injector syringe needle described in the present embodiment, described syringe needle 3 is made up of the bell and spigot joint 31 of a plastic material and the needle head body 33 of a metal material being fixedly connected on bell and spigot joint end, in described bell and spigot joint, the end of close needle head body forms the valve seat 32 of a semi-spherical shape, is provided with a spherical valve ball 35 in valve seat；Described valve seat forms the liquid in-out mouth 37 connected with needle head body near the bottom of needle head body, forms a step between valve seat end and bell and spigot joint inwall；Being provided with a back-up ring 34 on described step, the outer wall of back-up ring is connected with the inwall interference fit of bell and spigot joint, and the inwall of back-up ring forms multiple in order to stop the interior projection 341 that valve ball is deviate from；The liquid of crossing that described valve base inner wall face forms within a connection liquid in-out mouth and bell and spigot joint stitches 36；Residing for a diameter of valve seat of described valve ball the 4/5 of spherical diameter；The end of each described interior projection one with on the circumference of back-up ring outer wall concentric, and the 3/4 of a diameter of valve ball diameter of circumference residing for the end of described interior projection；The 1/5-1/3 that cross-sectional area is needle head body internal channel cross-sectional area of described liquid in-out mouth.
Syringe includes syringe 1, piston rod 2 and described syringe needle 3, described piston rod end connects the piston coordinated with described syringe, bell and spigot joint 31 coupling of described syringe needle 3 is socketed on the syringe needle joint 11 of syringe front end, and the syringe needle of the present invention can be with the intravenous injector adapted of various different size models.
When using the syringe extraction liquid being furnished with this syringe needle, liquid enters from needle head body, finally flow in syringe through valve seat and bell and spigot joint, under liquid promotes, valve ball is against on the interior projection of back-up ring, liquid flows through from the breach between interior projection and valve ball, and so speed of extraction liquid is not affected by valve ball.When infusing, piston promotes the liquid in syringe to flow to needle head body, and liquid, through valve seat, can promote valve ball to move to needle head body direction, thus valve ball can block liquid in-out mouth, and liquid can only flow into needle head body by the liquid seam of crossing from valve seat.The described 1/5-1/3 that cross-sectional area is needle head body internal channel cross-sectional area crossing liquid seam, so bigger when trying hard to recommend dynamic piston rod when using, the liquid speed flowed out from needle head body also can keep less flow velocity, the too fast patient of making of transfusion speed will be caused to be sick in the stomach because of the power inequality of making or heart is uncomfortable etc..Residing for a diameter of valve seat of described valve ball the 4/5 of spherical diameter, it is ensured that in infusion process, valve ball can stably block liquid in-out mouth, liquid is made the most only to pass through from crossing liquid seam.The 3/4 of a diameter of valve ball diameter of circumference residing for described interior projection, on the one hand ensures that valve ball is not deviate from from back-up ring direction, on the other hand ensures that the breach between valve ball and interior projection keeps stable bore, it is ensured that the speed of extraction liquid.Described back-up ring installs in syringe needle before injector package in advance.After described syringe needle is received on syringe needle joint by bell and spigot joint set, back-up ring is held out against by the end of syringe needle joint, back-up ring is entirely limited and will not drop out between syringe needle fitting end and valve seat, need not use glue or alternate manner to be fixed between back-up ring and bell and spigot joint, easy to assembly.
Claims (1)
1. an intravenous injector, include syringe, piston rod and syringe needle, described piston rod end connects the piston coordinated with described syringe, described syringe needle coupling is socketed on the syringe needle joint of syringe front end, described syringe needle is made up of the bell and spigot joint of a plastic material and the needle head body of a metal material being fixedly connected on bell and spigot joint end, it is characterized in that: in described bell and spigot joint, the end of close needle head body forms the valve seat of a semi-spherical shape, is provided with a spherical valve ball in valve seat；Described valve seat forms the liquid in-out mouth connected with needle head body near the bottom of needle head body, forms a step between valve seat end and bell and spigot joint inwall；Being provided with a back-up ring on described step, the outer wall of back-up ring is connected with the inwall interference fit of bell and spigot joint, and the inwall of back-up ring forms multiple in order to stop the interior projection that valve ball is deviate from；The liquid of crossing that described valve base inner wall face forms within a connection liquid in-out mouth and bell and spigot joint stitches；Residing for a diameter of valve seat of described valve ball the 4/5 of spherical diameter；The end of each described interior projection one with on the circumference of back-up ring outer wall concentric, and the 3/4 of a diameter of valve ball diameter of the circumference residing for end of described interior projection；The 1/5-1/3 that cross-sectional area is needle head body internal channel cross-sectional area of described liquid in-out mouth.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610442185.0A CN105963828B (en) | 2014-07-21 | 2014-07-21 | A kind of intravenous injector syringe needle |
| CN201410348421.3A CN104083818B (en) | 2014-07-21 | 2014-07-21 | A kind of intravenous injector and intravenous injector syringe needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348421.3A CN104083818B (en) | 2014-07-21 | 2014-07-21 | A kind of intravenous injector and intravenous injector syringe needle |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610442185.0A Division CN105963828B (en) | 2014-07-21 | 2014-07-21 | A kind of intravenous injector syringe needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104083818A CN104083818A (en) | 2014-10-08 |
| CN104083818B true CN104083818B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410348421.3A Active CN104083818B (en) | 2014-07-21 | 2014-07-21 | A kind of intravenous injector and intravenous injector syringe needle |
| CN201610442185.0A Active CN105963828B (en) | 2014-07-21 | 2014-07-21 | A kind of intravenous injector syringe needle |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610442185.0A Active CN105963828B (en) | 2014-07-21 | 2014-07-21 | A kind of intravenous injector syringe needle |
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| Country | Link |
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| CN (2) | CN104083818B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3606163A1 (en) * | 1986-02-26 | 1987-08-27 | Hoechst Ag | DEVICE FOR APPLICATING MEDICAL SUSPENSIONS |
| WO1992004064A1 (en) * | 1990-08-29 | 1992-03-19 | Butler John H A | A valve for a syringe |
| CN2244409Y (en) * | 1995-04-11 | 1997-01-08 | *** | Ball valve single-flowing direction syringe needle |
| GB2327885A (en) * | 1997-08-02 | 1999-02-10 | Nmt Group Plc | Filling needle |
| US6017332A (en) * | 1997-10-20 | 2000-01-25 | Urrutia; Hector | Medical dye delivery system |
| CN2474154Y (en) * | 2001-03-12 | 2002-01-30 | 李晓燕 | Intravenous injector |
| CN2638758Y (en) * | 2003-09-03 | 2004-09-08 | 何东华 | Pneumothorax puncture needle |
| CN201108644Y (en) * | 2007-11-16 | 2008-09-03 | 马君秀 | Improved syringe |
| CN201337503Y (en) * | 2009-02-07 | 2009-11-04 | 徐士林 | Anocelia puncture needle with protection valve |
| CN101797411B (en) * | 2010-03-18 | 2011-12-07 | 傅雅芬 | Air-pressure type needleless injector power head |
-
2014
- 2014-07-21 CN CN201410348421.3A patent/CN104083818B/en active Active
- 2014-07-21 CN CN201610442185.0A patent/CN105963828B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105963828B (en) | 2019-01-01 |
| CN105963828A (en) | 2016-09-28 |
| CN104083818A (en) | 2014-10-08 |
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| C14 | Grant of patent or utility model | ||
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| CB03 | Change of inventor or designer information | ||
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Inventor after: Wang Guizhong Inventor before: Li Weisong |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170315 Address after: 301700 Tianjin Fuyuan Wuqing Development Zone on the north side of business headquarters C04 building room 803 Patentee after: China (Tianjin) Medical Technology Co., Ltd. Address before: Straight street 312400 Zhejiang city of Shaoxing province Shengzhou City, No. 297 building two 103 Patentee before: Li Weisong |