CN109350806B - Disposable safety self-destruction injector - Google Patents
Disposable safety self-destruction injector Download PDFInfo
- Publication number
- CN109350806B CN109350806B CN201811524587.0A CN201811524587A CN109350806B CN 109350806 B CN109350806 B CN 109350806B CN 201811524587 A CN201811524587 A CN 201811524587A CN 109350806 B CN109350806 B CN 109350806B
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- Prior art keywords
- locking protrusion
- push rod
- clamping ring
- clamping
- upper locking
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- 238000001802 infusion Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 210000000078 claw Anatomy 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000968 medical method and process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—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 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
- A61M5/5086—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 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile for indicating if defective, used, tampered with or unsterile
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a disposable safe self-destruction injector, which comprises an outer cylinder, a needle seat and a push rod, wherein the needle seat consists of an outer circular part and a central conical part, an infusion channel which is penetrated up and down is arranged in the central conical part, and a clamping boss is arranged at the bottom of the infusion channel; a clamping ring is arranged below the needle seat, the whole clamping ring consists of a central part and a connecting bottom, an outer flange is arranged at the top end of the central part, and a central hole which is vertically communicated is arranged at the center of the central part; the outer wall of the connecting bottom is positioned on the inner hole wall of the outer cylinder in a sealing way; the lower part of the inner hole of the outer cylinder is provided with a locking structure formed by an upper locking protrusion and a lower locking protrusion, the maximum outer diameter of the clamping ring is larger than the inner diameter of the upper locking protrusion, and the clamping ring can pass through the upper locking protrusion to realize upper locking with the upper locking protrusion after being pulled in place by the push rod. The design of the invention realizes self-locking through the clamping ring and the outer barrel, removes the forward pushing clamping between the push rod and the outer barrel, brings convenience to the installation of the push rod, and can effectively avoid the advanced self-destruction of the injector.
Description
Technical Field
The invention relates to an injector, in particular to a disposable safe self-destruction injector.
Background
In the modern medical process, the injector is the most commonly used tool for doctors, and in order to avoid the potential safety hazards such as cross infection, the existing injector adopts a disposable self-destruction structure, namely, the injector is self-destroyed after being used, so that the injector cannot be reused for the second time.
At present, the types of self-destruction syringes on the market are many, wherein the self-destruction structure of one syringe is realized through manual back-pulling push rod, the back-pulling push rod is provided with a clamping groove formed by up-down locking protrusions at the tail part of the outer cylinder, the outer wall of the head part of the push rod is provided with a clamping protrusion, once the back-pulling push rod enables the clamping protrusion to cross the upper locking protrusion and enter the clamping groove, the locking of the push rod is realized, at the moment, the push rod cannot move forward or retract, and the needle point is completely retracted into the outer cylinder and is not exposed, so that the self-destruction of the syringe is realized.
The clamping locking self-destruction structure of the push rod and the outer barrel has the following defects: 1. because the push rod is of a rear-mounted structure, the arrangement of the upper and lower locking bulges brings difficulty to the installation of the push rod, and the head of the push rod must pass through the upper and lower locking bulge parts and enter the outer cylinder by means of a mounting assembly during the assembly; 2. once the drawing is too large in the liquid drawing process, the clamping protrusion on the push rod can be led to cross the upper locking protrusion to cause advanced self-destruction, so that unnecessary loss of liquid medicine and the syringe is caused.
Disclosure of Invention
In order to solve the problems, the invention designs the disposable safe self-destruction injector, which redesigns the needle seat for positioning the needle point, realizes self-locking through the clamping of the clamping ring and the outer cylinder when the push rod is pulled back to drive the needle seat to move downwards, thereby removing the forward pushing clamping structure between the push rod and the outer cylinder, bringing great convenience to the installation of the push rod and effectively avoiding the occurrence of the advanced self-destruction phenomenon of the injector.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The utility model provides a disposable safe self-destruction syringe, includes urceolus, needle file and push rod, the needle file location is installed in the hole front end of urceolus, and the push rod is installed in the hole of urceolus, its characterized in that: an inner convex edge is arranged at the upper opening part of the inner hole of the outer cylinder; the needle seat consists of an outer circular part and a central conical part, the bottoms of which are connected together, and the top end of the outer circular part is propped against the lower part of the inner convex edge; the central conical part is internally provided with an infusion channel which is penetrated up and down, and the bottom of the infusion channel is provided with a clamping boss; a clamping ring made of elastic material is arranged below the needle seat and is propped against the bottom of the outer circle part; the bottom surface of the clamping ring is matched with a rubber plug at the front end of the push rod, and the whole clamping ring consists of a central part and a connecting bottom part; an outer flange is arranged at the top end of the central part and is connected with the infusion channel in a sealing way after penetrating through the clamping boss of the needle seat; the center of the central part is provided with a central hole which is vertically penetrated, and the aperture of the upper opening part of the central hole is gradually reduced; the outer wall of the connecting bottom is positioned on the inner hole wall of the outer cylinder in a sealing way; the front end of the push rod is provided with a clamping head, and after injection is finished, the push rod is pushed forward to enable the clamping head to pass through the central hole of the clamping ring and then to be in clamping connection with the top of the clamping ring; the lower part of the inner hole of the outer cylinder is provided with a locking structure formed by an upper locking protrusion and a lower locking protrusion, and the inner diameter of the upper locking protrusion is larger than that of the lower locking protrusion; the maximum outer diameter of the clamping ring is larger than the inner diameter of the upper locking protrusion, and the clamping ring can pass through the upper locking protrusion to realize upper locking position with the upper locking protrusion after being pulled in place by the push rod.
Furthermore, the lower side of the clamping boss is provided with an arc chamfer for facilitating the insertion of the push rod clamping head.
Further, a plurality of inverted supporting claw spring pieces are arranged on the periphery of the upper surface of the connecting bottom of the clamping ring, the supporting claw spring pieces are distributed at intervals along the circumferential direction, and the maximum circumferential diameter of each supporting claw spring piece is larger than the inner diameter of the upper locking protrusion.
Further, the outer wall of the bottom is directly clamped and sealed with a positioning groove or a mounting boss on the inner hole wall of the outer barrel, or the outer wall of the bottom is provided with a bulge which is sealed and connected with the positioning groove on the inner hole wall of the outer barrel.
Further, the collar connecting bottom is provided with an annular groove for increasing the deformability of the collar connecting bottom.
Further, the thickness of the bottom of the collar connection gradually decreases from outside to inside.
Further, the push rod is sequentially divided into a clamping head, a connecting rod part, a connecting part, a stopping seat, an easy break point, a main rod part and a pressing plate from front to back; the rubber plug is fixedly arranged on the connecting part; the outer diameter of the stop seat is smaller than the inner diameter of the upper locking protrusion and larger than the inner diameter of the lower locking protrusion.
Further, the upper end of the above-mentioned stopping seat is provided with an arc chamfer which is convenient for the upper end to pass over the lower locking bulge during the assembly.
Furthermore, an inclined plane is arranged between the upper side of the upper locking protrusion and the inner hole wall of the outer cylinder, and a right angle surface is arranged between the lower side of the upper locking protrusion and the inner hole wall of the outer cylinder.
Further, the lower locking protrusion is a circular arc-like protrusion.
The needle seat realizes the upper stop position through the inner convex edge of the inner hole of the outer cylinder, and realizes the installation and positioning of the needle seat in the inner hole of the outer cylinder through the clamping ring.
In use, the push rod is pushed to the bottom, at the moment, the liquid medicine is injected completely, the front end of the rubber plug contacts the clamping ring, and the clamping head passes through the central hole of the clamping ring and is clamped with the top of the clamping ring. And then the push rod is withdrawn, the push rod slides downwards synchronously along the lower hole section of the needle seat with the clamping ring, in the process, the central part of the clamping ring gradually sinks to release the connection constraint between the connecting bottom and the outer cylinder, the process is continued until the outer flange at the central part of the clamping ring is clamped with the clamping boss of the lower hole section of the needle seat, then the push rod continues to pull back, at the moment, the push rod drives the needle seat with the needle point and the clamping ring to synchronously move backwards, the process is continued until the outer wall of the connecting bottom of the clamping ring passes over the upper locking bulge, at the moment, the reset clamping ring is locked against the right-angle plane of the upper locking bulge, so that the needle seat cannot move upwards, the stop seat of the push rod is clamped with the lower locking bulge, the lower stop position of the push rod is locked, and finally, the complete self-destruction of the syringe is realized by the easily broken push rod, the needle seat with the needle point is completely retracted into the outer cylinder, namely cannot move forwards and cannot move backwards.
The injector designed by the invention realizes the dead self-destruction with the outer cylinder by combining the retainer ring with the upper stop seat of the push rod. The clamping ring is made of high-elasticity materials, has good deformation performance, can deform to pass through the upper locking bulge and the lower locking bulge in the installation process, does not have the problem of being blocked and incapable of being assembled, and does not need to be assembled by means of other third-party tools. Meanwhile, the outer diameter of the stop seat on the push rod is smaller than the inner diameter of the upper locking bulge and larger than the inner diameter of the lower locking bulge, the assembly can be completed through the lower locking bulge in a hard extrusion mode by utilizing the arc chamfer at the front end of the stop seat during the assembly, the installation of each part of the injector can be conveniently and rapidly realized without any tool in the whole assembly process, and the phenomenon of advanced self-destruction caused by overlarge back pulling of the push rod can be avoided during the use.
Drawings
FIG. 1, a plan view cross-section of the present invention;
FIG. 2 is a plan view of the outer cylinder of the present invention;
Fig. 3 is a plan view structural cross-section of the needle mount of the present invention;
FIG. 4 is a cross-sectional view of the planar structure of the collar of the present invention;
FIG. 5 is a schematic plan view of a clip with a pawl spring;
FIG. 6 is a schematic diagram of a three-dimensional structure of a clip provided with a pawl spring plate;
FIG. 7 is an enlarged view of a portion of the snap-fit connection of the collar and outer barrel of the present invention;
FIG. 8 is an enlarged view of a portion of a second construction of the snap-fit connection of the collar and outer barrel of the present invention;
FIG. 9 is an enlarged view of a portion of a third construction of the snap-fit connection of the collar and outer barrel of the present invention;
FIG. 10 is a schematic view of a second construction of the collar of the present invention;
FIG. 11 is a third schematic structural view of the collar of the present invention;
FIG. 12 is a schematic plan view of a putter in accordance with the present invention;
FIG. 13 is a schematic view of the structure of the snap connection of the snap head and the collar when the injection is completed;
Fig. 14 is a schematic structural diagram of the push rod of the present invention when the push rod is pulled back to drive the collar to slide downwards relative to the needle seat infusion channel;
FIG. 15 is a schematic view of the structure of the push rod of the present invention when the retainer and the needle holder are pulled back;
FIG. 16 is a schematic view of a structure of the push rod of the present invention with a collar and a needle seat locked by pulling;
Fig. 17 is a schematic view of the structure of the push rod of the injector of the present invention after being broken from the easy breaking point.
Detailed Description
As shown in fig. 1, the disposable safe self-destruction syringe comprises an outer barrel 1, a needle seat 2 and a push rod 3, wherein the needle seat 2 is positioned and installed at the front end of an inner hole 11 of the outer barrel 1, and the push rod 3 is installed in the inner hole 11 of the outer barrel 1.
As shown in fig. 2, the upper opening of the inner bore 11 of the outer cylinder is provided with an inner flange 111 for upper stop of the needle holder 2 when the front end of the inner bore 11 of the outer cylinder is assembled. The lower part of the inner hole 11 of the outer cylinder is provided with a locking structure consisting of an upper locking protrusion 41 and a lower locking protrusion 42, and the inner diameter of the upper locking protrusion 41 is larger than that of the lower locking protrusion 42. An inclined surface 411 is arranged between the upper side of the upper locking protrusion 41 and the inner hole wall of the outer barrel, and a right angle surface 412 is arranged between the lower side of the upper locking protrusion 41 and the inner hole wall of the outer barrel. The lower locking protrusion 42 is a circular arc-like protrusion.
As shown in fig. 3, the needle holder 2 is composed of an outer circular portion 21 and a central tapered portion 22, the bottoms of which are connected together. Wherein the top end of the outer circle part 21 is propped under the inner convex edge 111, and the inner wall of the outer circle part 21 is provided with a connecting thread 211 of a needle point seat. The central cone 22 is provided with a vertically penetrating infusion channel 221, a clamping boss 2211 is arranged at the bottom of the infusion channel 221, and an arc chamfer 2212 for facilitating insertion of the push rod clamping head is arranged at the lower side of the clamping boss 2211.
As shown in fig. 1 and 4, a collar 5 made of elastic material is arranged below the needle seat 2 and is propped against the bottom of the outer circle part 21 of the needle seat, and the bottom surface of the collar 5 is correspondingly matched with the end surface of the rubber plug 31 at the front end of the push rod 3.
The entire collar 5 is formed by a central portion 51 and a connecting bottom portion 52. An outer flange 511 is arranged at the top end of the central part 51, and the outer flange 511 passes through a clamping boss 2211 of the needle seat and is connected with the transfusion channel 221 in a sealing way; the center portion 51 is provided with a center hole 512 penetrating up and down, the aperture of the upper opening portion of the center hole 512 is gradually reduced to form a conical inclined surface 5121, and the conical inclined surface 5121 facilitates the insertion of the push rod head clamping head 32 on one hand, and enables the clamping head 32 to be in clamping connection with the clamping head 32 after being inserted on the other hand.
The outer wall of the connecting bottom 52 is directly connected with the positioning groove 112 on the inner hole wall of the outer barrel in a clamping and sealing way, the structure is shown in fig. 7, or the outer wall of the connecting bottom 52 is directly connected with the mounting boss 113 on the inner hole wall of the outer barrel in a clamping and sealing way, the structure is shown in fig. 8, or the outer wall of the connecting bottom 52 is connected with the positioning groove 114 on the inner hole wall of the outer barrel in a clamping and sealing way through the arranged protrusion 522, the structure is shown in fig. 9, the positions of the protrusion 522 and the positioning groove 114 can be interchanged, namely, the protrusion is arranged on the inner hole wall of the outer barrel, and the positioning groove is arranged on the outer wall of the collar connecting bottom 52.
The outer diameter of the clamping ring 5 is larger than the inner diameter of the upper locking protrusion 41, and the clamping ring 5 can pass the upper locking protrusion 41 to realize an upper locking position with the upper locking protrusion 41 when being pulled back by the push rod 3.
Here, to further enhance the locking effect of the upper stop of the collar 5, as shown in fig. 5 and 6, a plurality of inverted claw-shaped elastic pieces 521 are disposed on the periphery of the upper surface of the connection bottom 52 of the collar 5, each claw-shaped elastic piece 521 is disposed at intervals in the circumferential direction, and the maximum circumferential diameter of each claw-shaped elastic piece 521 is larger than the inner diameter of the upper locking protrusion 41. In use, once each of the pawl spring plates 521 slides down over the upper locking projection 41 and then returns, the top end of each of the pawl spring plates 521 is pushed against the lower right-angle surface of the upper locking projection 41, so as to achieve effective upper-stop locking.
Here, the collar 5 needs to be effectively deformed to be assembled or separated from the positioning groove 112 on the inner hole wall of the outer cylinder in use, so that the deformation performance is required to be enhanced, and the connection bottom 52 of the collar 5 is provided with an annular groove 523, the structure of which is shown in fig. 4, in this illustration, the annular groove 523 is arranged on the upper surface of the connection bottom 52, and in practice, the annular groove 523 can also be arranged on the lower surface of the connection bottom 52. Alternatively, the collar attachment base 52 may be tapered from the outside to the inside, as shown in fig. 10 or 11.
As shown in fig. 12, the push rod 3 is sequentially divided into an engaging head 32, a link portion 33, a connecting portion 34, a stopper 35, an easy break 36, a main rod portion 37 and a pressing plate 38 from front to back.
The locking head 32 passes through the central hole 512 of the clamping ring 5 after injection, and is locked with the top of the clamping ring 5.
The rubber plug 31 is fixedly installed on the connecting portion 34 through a positioning piece 341.
The outer diameter of the stopper seat 35 is smaller than the inner diameter of the upper locking protrusion 41 and larger than the inner diameter of the lower locking protrusion 42, and the upper end of the stopper seat 35 is provided with a circular arc chamfer 351 which is convenient to pass over the lower locking protrusion 42 when it is assembled.
In summary, the needle stand 2 of the invention realizes the upper stop through the inner convex edge 111 of the inner hole 11 of the outer cylinder, and realizes the installation and positioning of the needle stand 2 in the inner hole 11 of the outer cylinder through the retainer 5.
In use, the push rod 3 is pushed to the bottom, at this time, the front end of the rubber plug 31 contacts the collar 5 after the injection of the liquid medicine is completed, and the locking head 32 penetrates through the central hole 512 of the collar 5 and is locked with the top of the collar 5, and the structure is shown in fig. 13. The push rod 3 is then withdrawn, and the retainer 5 is slid down synchronously along the infusion channel 221 of the needle holder 2, and in the process, the central part 51 of the retainer 5 gradually descends to release the engagement constraint between the outer wall of the connecting bottom 52 and the inner hole 11 of the outer cylinder, until the outer flange 511 of the central part 51 of the retainer is engaged with the engagement boss 2211 of the infusion channel 221 of the needle holder, and the structure is as shown in fig. 14. The push rod 3 continues to pull back, the needle seat 2 with the needle point 6, the clamping ring 5 and the push rod 3 are driven to synchronously move backwards, the structure is shown in fig. 15, the process is that the outer wall of the connecting bottom 52 of the clamping ring completely passes through the upper locking protrusion 41, the reset clamping ring 5 is locked against the upper locking protrusion 41 at the moment, the clamping ring 5 and the needle seat 2 cannot move upwards, meanwhile, the stop seat 35 of the push rod 3 is locked against the lower locking protrusion 42, the lower stop locking of the push rod 3 is realized, the structure is shown in fig. 16, finally, the push rod is broken from the easy break point 36 of the push rod 3, namely, the complete self-destruction of the syringe is realized, the needle seat 2 with the needle point 6 is completely retracted into the outer cylinder 1, namely, the needle seat 2 cannot move forwards or cannot move backwards, and the structure is shown in fig. 17.
In summary, the injector designed by the invention realizes the dead self-destruction with the outer cylinder 1 mainly by combining the retainer ring 5 with the upper stop seat 35 of the push rod. The collar 5 is here made of a highly elastic material, which has a good deformability, and which can be deformed rapidly over the upper and lower locking projections 41, 42 during the mounting process, without the aid of further auxiliary sleeves, without the problem of jamming and failure in assembly. Meanwhile, the outer diameter of the stop seat 35 on the push rod 3 is smaller than the inner diameter of the upper locking protrusion 41 and larger than the inner diameter of the lower locking protrusion 42, so that the assembly can be completed through the lower locking protrusion 42 in a hard extrusion mode by only utilizing the arc chamfer 351 at the front end of the stop seat, and meanwhile, the phenomenon of early self-destruction caused by overlarge back pull of the push rod 3 can be avoided in use.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, but any simple modification, equivalent variation or modification made to the above embodiments according to the technical principles of the present invention still falls within the scope of the technical solutions of the present invention.
Claims (8)
1. The utility model provides a disposable safe self-destruction syringe, includes urceolus, needle file and push rod, the needle file location is installed in the hole front end of urceolus, and the push rod is installed in the hole of urceolus, its characterized in that: an inner convex edge is arranged at the upper opening part of the inner hole of the outer cylinder; the needle seat consists of an outer circular part and a central conical part, the bottoms of which are connected together, and the top end of the outer circular part is propped against the lower part of the inner convex edge; the central conical part is internally provided with an infusion channel which is penetrated up and down, and the bottom of the infusion channel is provided with a clamping boss; a clamping ring made of elastic material is arranged below the needle seat and is propped against the bottom of the outer circle part; the bottom surface of the clamping ring is matched with a rubber plug at the front end of the push rod, and the whole clamping ring consists of a central part and a connecting bottom part; an outer flange is arranged at the top end of the central part and is connected with the infusion channel in a sealing way after penetrating through the clamping boss of the needle seat; the center of the central part is provided with a central hole which is vertically penetrated, and the aperture of the upper opening part of the central hole is gradually reduced; the outer wall of the connecting bottom is positioned on the inner hole wall of the outer cylinder in a sealing way; the front end of the push rod is provided with a clamping head, and after injection is finished, the push rod is pushed forward to enable the clamping head to pass through the central hole of the clamping ring and then to be in clamping connection with the top of the clamping ring; the lower part of the inner hole of the outer cylinder is provided with a locking structure formed by an upper locking protrusion and a lower locking protrusion, and the inner diameter of the upper locking protrusion is larger than that of the lower locking protrusion; the maximum outer diameter of the clamping ring is larger than the inner diameter of the upper locking protrusion, and the clamping ring can pass through the upper locking protrusion to realize upper locking with the upper locking protrusion after being pulled in place by the push rod; the lower side of the clamping boss is provided with an arc chamfer for facilitating the insertion of the push rod clamping head; the outer periphery of the upper surface of the connecting bottom of the clamping ring is provided with a plurality of inverted supporting claw elastic pieces, the supporting claw elastic pieces are distributed at intervals along the circumferential direction, and the maximum circumferential diameter of each supporting claw elastic piece is larger than the inner diameter of the upper locking protrusion.
2. A disposable safety self-destroying syringe according to claim 1, wherein: the outer wall of the clamping ring connecting bottom is directly clamped and connected with the positioning groove or the mounting boss on the inner hole wall of the outer barrel in a sealing manner, or the outer wall of the connecting bottom is provided with a bulge and is connected with the positioning groove on the inner hole wall of the outer barrel in a sealing manner.
3. A disposable safety self-destroying syringe according to claim 1, wherein: the collar joint bottom is provided with an annular groove for increasing the deformability of the collar joint bottom.
4. A disposable safety self-destroying syringe according to claim 1, wherein: the thickness of the bottom of the collar connection gradually decreases from outside to inside.
5. A disposable safety self-destroying syringe according to claim 1, wherein: the push rod is sequentially divided into a clamping head, a connecting rod part, a connecting part, a stop seat, an easy break point, a main rod part and a pressing plate from front to back; the rubber plug is fixedly arranged on the connecting part; the outer diameter of the stop seat is smaller than the inner diameter of the upper locking protrusion and larger than the inner diameter of the lower locking protrusion.
6. A disposable, safe, self-destroying syringe according to claim 5, wherein: the upper end of the stop seat is provided with an arc chamfer which is convenient for the stop seat to pass through the lower locking bulge during assembly.
7. A disposable safety self-destroying syringe according to claim 1, wherein: an inclined plane is arranged between the upper side of the upper locking protrusion and the inner hole wall of the outer cylinder, and a right angle surface is arranged between the lower side of the upper locking protrusion and the inner hole wall of the outer cylinder.
8. A disposable safety self-destroying syringe according to claim 1, wherein: the lower locking protrusion is an arc-like protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524587.0A CN109350806B (en) | 2018-12-13 | 2018-12-13 | Disposable safety self-destruction injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524587.0A CN109350806B (en) | 2018-12-13 | 2018-12-13 | Disposable safety self-destruction injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109350806A CN109350806A (en) | 2019-02-19 |
| CN109350806B true CN109350806B (en) | 2024-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811524587.0A Active CN109350806B (en) | 2018-12-13 | 2018-12-13 | Disposable safety self-destruction injector |
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| CN (1) | CN109350806B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111012976A (en) * | 2020-01-21 | 2020-04-17 | 贝普医疗科技有限公司 | Pull-back syringe with shielding needle eccentric blocking piece |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209286369U (en) * | 2018-12-13 | 2019-08-23 | 河南曙光汇知康生物科技股份有限公司 | A kind of disposable safety self-breaking injector convenient for assembly |
| CN209286370U (en) * | 2018-12-13 | 2019-08-23 | 河南曙光汇知康生物科技股份有限公司 | A kind of disposable safety self-breaking injector |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7494479B2 (en) * | 2002-09-16 | 2009-02-24 | Medsolve Technologies, Inc. | Syringe with retractable needle assembly |
| CN100471533C (en) * | 2006-08-14 | 2009-03-25 | 林作钱 | Disposable self-destroyed syringe |
| CN101444649B (en) * | 2008-12-30 | 2011-01-12 | 林作钱 | Low-residual safe self-destructing injector |
| BR112012005102A2 (en) * | 2009-09-10 | 2019-09-24 | Changzhou Hekang Medical Instr Co Ltd | retractable safety syringe with retractable needle tip |
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| CN103230634B (en) * | 2013-04-26 | 2015-08-05 | 江波 | The retractable safety injector of needle point |
| US11065394B2 (en) * | 2015-07-15 | 2021-07-20 | Guangdong Intmed Medical Appliance Co., Ltd. | Syringe with retractable needle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209286369U (en) * | 2018-12-13 | 2019-08-23 | 河南曙光汇知康生物科技股份有限公司 | A kind of disposable safety self-breaking injector convenient for assembly |
| CN209286370U (en) * | 2018-12-13 | 2019-08-23 | 河南曙光汇知康生物科技股份有限公司 | A kind of disposable safety self-breaking injector |
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