CN113509618A - Quantitative self-destruction syringe - Google Patents
Quantitative self-destruction syringe Download PDFInfo
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- CN113509618A CN113509618A CN202110413516.9A CN202110413516A CN113509618A CN 113509618 A CN113509618 A CN 113509618A CN 202110413516 A CN202110413516 A CN 202110413516A CN 113509618 A CN113509618 A CN 113509618A
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- quantitative
- destruction
- self
- elastic
- sleeve
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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
- A61M5/50—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
- A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
- A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston
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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
- A61M5/50—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
- A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
- A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston
- A61M2005/5033—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston by use of an intermediate blocking member positioned between the syringe barrel and the piston rod to prevent retraction of the latter, e.g. toothed clip placed on the 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 relates to a quantitative self-destruction syringe, belonging to the field of sterile medical instruments. Comprises an outer sleeve, a core bar and a piston, wherein the core bar is sequentially provided with a pull-back ring and a check ring; the opening end of the outer sleeve is provided with a quantitative self-destruction clamping seat, an elastic sleeve is arranged in the quantitative self-destruction clamping seat, a quantitative boss is arranged on the inner wall of the quantitative self-destruction clamping seat in a protruding mode, and the elastic sleeve is sleeved outside the core rod; the elastic sleeve comprises a sleeve body, the front end of the sleeve body is provided with an elastic buckle arranged around the central axis, the rear end of the sleeve body is provided with a hollow positioning boss, the outer surface of the positioning boss is provided with a quantitative clamping groove inwards, and the quantitative clamping groove is matched with the quantitative boss; the front end of the core rod is provided with a pull-back ring, and the middle part of the core rod is provided with a non-return ring. The invention can quantitatively suck liquid, completes self-destruction after injection, has stable self-destruction state, safety and reliability, does not increase bubbles in the suction process, does not need secondary exhaust, reduces the workload of medical personnel, reduces infection and is safer to use.
Description
Technical Field
The invention relates to a quantitative self-destruction syringe, belonging to the field of sterile medical instruments.
Background
At present, a common syringe is widely used in China, and when the common syringe sucks liquid medicine, an operation mode that scales are marked and medical care personnel visually confirm suction amount is generally adopted. At present, the common quantitative self-destruction syringe has a complex structure, a plurality of manufacturers specially design the head of the core rod and the needle seat, and the core rod is pushed to the bottom to clamp the needle seat to realize self-destruction.
The prior art has the following technical defects:
1. the dosage of the liquid medicine is uncertain, and the potential safety hazard of medicine application exists. The condition that the sucked liquid medicine exceeds the preset dosage is easy to occur in the using process of a common syringe, on one hand, waste is caused, and on the other hand, the harm is also brought to a patient due to excessive administration.
2. At present, the common self-destruction syringe has a complex structure, and the reliability has certain limitation, for example, the utility patent with the publication number of CN2770678Y discloses an anchor piston needle retraction type safety syringe, which comprises a needle seat, a needle, a push rod and an outer sleeve, wherein the needle is arranged at the top end of the needle seat, the needle is fixedly connected with the needle seat, the push rod is arranged in the outer sleeve, the front end of the push rod is provided with a prismatic groove, the head part of the outer sleeve is provided with a cylinder neck, the needle seat is arranged in the cylinder neck, the outer ring of the needle seat is provided with a convex ring driving fit ring, the needle seat is connected with the cylinder neck through the driving fit ring of the convex ring driving fit ring, and the lower part of the needle seat is provided with an anchor head. The utility model discloses a syringe needle seat is connected through protruding annular driving fit ring driving fit with the barrel neck, and syringe needle seat is fixed with the frictional force of barrel neck only through protruding annular driving fit ring, if frictional force is too little then syringe needle seat and barrel neck easily take place to remove, and increase frictional force then with the difficult syringe needle seat of pulling of anchor form head or the anchor form head breaks and can't realize the syringe needle problem of returning and contracting. The utility model discloses a CN202777326U utility model discloses a pull-back formula self-destruction syringe, including the injection tube, the needle file, the needle cover, the needle tubing, the needle spare, core bar and plug, it is connected with the front end of injection tube to change the needle file, the needle cover is on the needle file, the rear end of needle tubing is fixed in with the needle spare, the front end holds in the needle cover, this needle spare is installed in the needle file, the rear end of needle spare extends to in the injection tube, and the needle spare is provided with the inclined plane, the injection tube is provided with the inclined plane that is used for cooperating the needle spare in order to prevent the cooperation inclined plane that the needle spare moved back, the core bar is inserted in the injection tube by the rear end of injection tube, the front end setting of core bar and the breach that is used for holding the needle spare rear end, the opening part of breach is provided with the screens that is used for the inclined plane of extrusion needle point, the plug cover is on the front end of core bar. The utility model discloses an initial state plug is in the upper end on needle spare inclined plane, and the plug can not push away the bottom, leads to the bubble too much during the suction liquid medicine, need discharge the bubble in the overcoat.
3. Too many bubbles in the suction process need secondary exhaust, not only increase medical personnel work load, increased medical personnel working strength, moreover, reduced work efficiency, increased the infection probability.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the quantitative self-destruction syringe overcomes the defects of the prior art, can quantitatively suck liquid, completes self-destruction after injection, is stable in self-destruction state, safe and reliable, does not increase bubbles in the suction process, does not need secondary exhaust, reduces the workload of medical workers, reduces the infection probability and is safer to use.
The quantitative self-destruction syringe comprises an outer sleeve, a core rod and a piston, wherein the core rod is sequentially provided with a pull-back ring and a check ring; the opening end of the outer sleeve is provided with a quantitative self-destruction clamping seat, an elastic sleeve is arranged in the quantitative self-destruction clamping seat, a quantitative boss is arranged on the inner wall of the quantitative self-destruction clamping seat in a protruding mode, and the elastic sleeve is sleeved outside the core rod;
the elastic sleeve comprises a sleeve body, the front end of the sleeve body is provided with an elastic buckle arranged around the central axis, the rear end of the sleeve body is provided with a hollow positioning boss, the outer surface of the positioning boss is provided with a quantitative clamping groove inwards, and the quantitative clamping groove is matched with the quantitative boss;
the front end of the core bar is provided with a pull-back ring, and the middle part of the core bar is provided with a non-return ring;
initial state: the check ring is arranged in the elastic sleeve; the piston is attached to the bottom of the outer sleeve.
Working process or working principle:
the front end of the core bar is provided with a piston which can adopt a rubber plug, the core bar and the piston form a plunger, and the injection needle can be directly adhered to the end of the outer sleeve taper without a needle seat. In the initial state, the piston is attached to the bottom of the outer sleeve, and no air exists in the outer sleeve.
Pumping liquid: and pulling the core rod, enabling the check ring to move outwards along the inner cavity of the elastic sleeve until the elastic buckle is clamped by the check ring, continuously moving the core rod, pulling the elastic sleeve by the check ring to move together until the quantitative boss is clamped into the quantitative clamping groove, and sucking the liquid to reach the preset dosage.
Injection and self-destruction: and pushing the plunger to perform injection, wherein the check ring enters the inner cavity of the elastic sleeve to continue pushing the plunger, and the piston reaches the bottom of the outer sleeve to complete the injection. At the moment, the check ring reaches the outside of the elastic buckle, the elastic buckle resets, and the check ring clamps the elastic buckle, so that the core rod cannot be pumped back, liquid cannot be pumped, and self-destruction is realized.
Can be according to predetermined dose ration suction liquid, accomplish the back after the injection, through the mutual block of check ring and elasticity buckle, realize self-destruction. Moreover, after the quantitative lug boss is movably clamped with the quantitative clamping groove in the suction process, the liquid is sucked quantitatively, the piston is positioned at the bottom of the outer sleeve before the liquid is sucked, no redundant air exists in the outer sleeve, and bubbles are prevented from being increased in the suction process; the plunger can be pushed to the bottom during injection to complete injection and realize self-destruction. After the quantitative self-destruction syringe is self-destructed, the quantitative boss is clamped with the quantitative clamping groove, the check ring is clamped with the elastic buckle, the piston is positioned at the bottom of the outer sleeve, and the quantitative self-destruction syringe, the elastic sleeve, the core bar and the outer sleeve are mutually clamped, so that the self-destruction syringe is in a self-destruction state with a stable structure and reliable self-destruction.
Preferably, the check ring side surface is provided with a tapered guide slope gradually increasing from the front end to the rear end.
Preferably, the maximum outer diameter of the check ring and the pull-back ring is larger than the minimum inner diameter of the elastic buckle, so that the check ring can be clamped by the elastic buckle; the pull-back ring can be ensured to be clamped and pushed by the elastic buckle.
Preferably, the quantitative clamping groove is annular, and the cross section of the quantitative clamping groove is trapezoidal.
Preferably, the rear end of the core rod is provided with a shrink-proof convex ring which is arranged in a manner of adapting to the inner diameter of the elastic sleeve.
Preferably, the outer diameter of the shrink-proof collar is smaller than the inner diameter of the elastic sleeve.
Preferably, the length between the check ring and the anti-shrink convex ring is smaller than the length of the elastic sleeve.
Preferably, the length between the check ring and the anti-shrink convex ring is set corresponding to the length from the elastic buckle to the quantitative clamping groove of the elastic sleeve.
Preferably, a reinforcing plate is arranged around the outer sleeve corresponding to the quantitative lug boss.
Preferably, the end part of the opening end of the quantitative self-destruction clamping seat is provided with a limiting boss protruding towards the circle center along the radial direction, and the outer diameter of the positioning boss is larger than the inner diameter of the limiting boss.
Preferably, the distance between the outer edge of the end part of the positioning boss and the quantitative clamping groove is smaller than the distance between the quantitative boss of the quantitative self-destruction clamping seat and the inner edge of the end part of the limiting boss. That is to say, after the quantitative draw-in groove and the block of quantitative boss, leave suitable surplus between location boss tip outward flange and the spacing boss tip inward flange, ensure quantitative draw-in groove and the complete block of quantitative boss.
Preferably, the elastic catch is provided with a taper shape with an outer diameter gradually increasing from the front end to the rear end, and the inner diameter of the elastic catch gradually increases from the front end to the rear end.
Preferably, the positioning boss is provided with an elastic notch along the axial direction.
Preferably, the positioning boss is uniformly provided with elastic notches around the central line.
Preferably, the elastic buckles are evenly arranged at least three around the central axis of the sleeve body.
Preferably, the front end of the quantitative self-destruction card seat is provided with an expansion table, and the expansion table is arranged in a manner of adapting to the elastic buckle; a limiting clamping table is arranged between the expansion table and the quantitative boss, the limiting clamping table corresponds to the limiting clamping table, and a protruded non-return clamping table is arranged outwards at the bottom end of the elastic buckle.
Preferably, the elastic sleeve is made of plastic.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the pull-back ring, the check ring and the elastic buckle are arranged, the elastic sleeve moves in the quantitative self-destruction clamping seat to finish the pumping of the liquid with the preset dosage, and after the injection is finished, the check ring and the elastic buckle are clamped tightly, so that the core bar cannot move back and forth, the product cannot be used for the second time, and the self-destruction is realized. The quantitative self-destruction injector can quantitatively suck liquid, self-destruction is completed after injection, the self-destruction mode is simple, the force application direction is single, normal injection is performed by force, self-destruction is realized without adopting a destruction mode, the quantitative self-destruction injector is not damaged, and the self-destruction injector is stable in self-destruction state, safe and reliable.
2. Through setting up ration boss and ration draw-in groove, through adopting movable's elasticity external member ration suction liquid, do not persist the air in the overcoat before having realized suction liquid ingeniously, the plunger can push away the end completely during the injection and accomplish the injection to realize self-destruction, suction liquid in-process does not increase the bubble, need not secondary exhaust, has reduced medical personnel's work load, has reduced the infection probability, uses more safe and reliable.
3. Through setting up toper direction inclined plane, reduce the resistance when the check ring outwards promotes from elastic buckle when being convenient for inject, be convenient for accomplish the injection, simultaneously, the back is accomplished in the injection, and the check ring is released in the elastic buckle, and check ring blocks with elastic buckle, and the core bar can not be taken out back, realizes self-destruction.
4. The quantitative self-destruction syringe is provided with the anti-shrinkage convex ring, and the anti-shrinkage convex ring is positioned outside the elastic sleeve when the quantitative self-destruction syringe is in an initial state. After the injection is finished and the self-destruction is realized, the shrink-proof convex ring of the core rod is positioned in the inner cavity of the elastic sleeve to support the elastic sleeve, so that the elastic sleeve is prevented from being separated due to the deformation of the quantitative clamping groove.
5. When the quantitative self-destruction injector is in a self-destruction state, when a larger force is applied to pull the core bar, the check ring of the core bar is blocked by the elastic buckle and cannot move, and meanwhile, after the elastic sleeve is pulled, the elastic sleeve can shrink and deform to a certain degree, the quantitative convex ring of the outer sleeve can be separated from the quantitative clamping groove, the anti-shrinkage convex ring plays a role in supporting the elastic sleeve, and the quantitative clamping groove of the elastic sleeve can be prevented from deforming greatly; meanwhile, the limiting boss of the outer sleeve provides an inward acting force for the elastic sleeve to prevent the elastic sleeve from being separated. The non-return ring, the shrink-proof convex ring and the limiting boss are mutually clamped under the combined action, namely the elastic sleeve, the core bar and the outer sleeve are mutually clamped, and the self-destruction state is stable in structure and reliable in self-destruction. The core rod and the elastic sleeve are prevented from being separated, and the safety and the effectiveness of the self-destruction state are ensured.
Drawings
FIG. 1: an initial state structure diagram of an embodiment of the present invention,
FIG. 2: the liquid-pumping pullback ring of one embodiment of the present invention is in contact with the elastic sleeve,
FIG. 3: the schematic structure at a in figure 2 is shown,
FIG. 4: the structure of the liquid pumping state reaching the preset dosage state of the embodiment of the invention is schematically shown,
FIG. 5: the self-destruction state structure diagram of an embodiment of the invention,
FIG. 6: the enlarged structure at B in figure 5 is schematically shown,
FIG. 7: the schematic view of the core bar structure,
FIG. 8: the structure of the outer sleeve is schematically shown,
FIG. 9: the enlarged structure at C in figure 8 is schematically shown,
FIG. 10: the structure of the elastic sleeve is schematically shown.
In the figure: 1. a core bar 2, an elastic sleeve 3, a jacket 4, a piston 5 and an injection needle;
1.1, a pull-back ring 1.2, a check ring 1.3, a conical guide inclined plane 1.4 and an anti-shrinkage convex ring;
2.1, an elastic buckle 2.2, a non-return clamping table 2.3, a kit body 2.4, an elastic notch 2.5, a quantitative clamping groove 2.6 and a positioning boss;
3.2, an expansion table 3.3, a limit clamping table 3.4, a quantitative boss 3.5, a reinforcing plate 3.6 and a limit boss.
Detailed Description
The technical solution in the embodiments of the present invention will be further clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention:
example 1
As shown in fig. 1 to 10, the quantitative self-destruction syringe of the present invention comprises an outer sleeve 3, a core bar 1 and a piston 4, wherein the core bar 1 is sequentially provided with a pull-back ring 1.1 and a check ring 1.2; the opening end of the outer sleeve 3 is provided with a quantitative self-destruction clamping seat, an elastic sleeve 2 is arranged in the quantitative self-destruction clamping seat, a quantitative boss 3.4 is arranged on the inner wall of the quantitative self-destruction clamping seat in an outward protruding mode, and the elastic sleeve 2 is sleeved outside the core rod 1. The elastic sleeve 2 comprises a sleeve body 2.3, the front end of the sleeve body 2.3 is provided with an elastic buckle 2.1 arranged around the central axis, the rear end of the sleeve body 2.3 is provided with a hollow positioning boss 2.6, the outer surface of the positioning boss 2.6 is internally provided with a quantitative clamping groove 2.5, and the quantitative clamping groove 2.5 is matched with the quantitative boss 3.4;
the front end of the core bar 1 is provided with a pull-back ring 1.1, and the middle part of the core bar 1 is provided with a non-return ring 1.2;
initial state: the check ring 1.2 is arranged in the elastic sleeve 2; the piston 4 is attached to the bottom of the jacket.
The side surface of the check ring 1.2 is provided with a conical guide inclined surface 1.3 which is gradually increased from the front end to the rear end.
The maximum outer diameters of the check ring 1.2 and the pull-back ring 1.1 are larger than the minimum inner diameter of the elastic buckle 2.1, so that the check ring 1.2 can be clamped by the elastic buckle 2.1; the pull-back ring 1.1 can be ensured to be clamped and pushed by the elastic buckle 2.1.
The quantitative clamping groove 2.5 is annular, and the cross section of the quantitative clamping groove 2.5 is trapezoidal.
The rear end of the core rod 1 is provided with a shrink-proof convex ring 1.4, and the shrink-proof convex ring 1.4 is arranged in a way of adapting to the inner diameter of the elastic sleeve 2.
The outer diameter of the shrink-proof convex ring 1.4 is smaller than the inner diameter of the elastic sleeve 2.
The length between the check ring 1.2 and the shrink-proof convex ring 1.4 is smaller than that of the elastic sleeve 2.
The length between the check ring 1.2 and the shrink-proof convex ring 1.4 is set corresponding to the length from the elastic buckle 2.1 to the quantitative clamping groove 2.5 of the elastic sleeve 2.
A reinforcing plate 3.5 is arranged around the outer sleeve 3 corresponding to the quantitative lug boss 3.4.
The end part of the opening end of the quantitative self-destruction clamping seat is provided with a limiting boss 3.6 in a protruding mode along the radial direction towards the circle center, and the outer diameter of the positioning boss 2.6 is larger than the inner diameter of the limiting boss 3.6.
The distance between the outer edge of the end part of the positioning boss 2.6 and the quantitative clamping groove 2.5 is smaller than the distance between the quantitative boss 3.4 of the quantitative self-destruction clamping seat and the inner edge of the end part of the limiting boss 3.6. That is to say, after the ration draw-in groove 2.5 and the block of ration boss 3.4, the suitable surplus is left with spacing boss 3.5 tip inward flange to the 2.6 tip outward flanges of location boss. Ensure quantitative draw-in groove to the quantitative boss removal block in-process, quantitative draw-in groove can block with quantitative boss completely.
The elastic buckle 2.1 is in a conical shape with the outer diameter gradually increasing from the front end to the rear end, and the inner diameter of the elastic buckle 2.1 gradually increases from the front end to the rear end.
Elastic gaps 2.4 are axially formed in the positioning bosses 2.6, the elastic gaps 2.4 are uniformly formed in the positioning bosses 2.6 around the central line, and at least three elastic buckles 2.1 are uniformly arranged around the central axis of the sleeve body 2.3. Preferably, the number of the elastic notches is four, the elastic notches are evenly distributed around the central axis, and the cross section of the elastic notches is in a cross shape. The elastic gap is arranged across the quantitative clamping groove. The elasticity of the positioning boss is ensured.
As shown in fig. 3 and 10, an expansion table 3.2 is arranged at the front end of the quantitative self-destruction card seat, and the expansion table 3.2 is arranged in a manner of being matched with an elastic buckle 2.1; spacing ka tai 3.3 is equipped with between expansion platform 3.2 and the ration boss 3.4, corresponds spacing ka tai 3.3, and the external member body 2.3 front end is equipped with non return ka tai 2.2. The external member body 2.3 can keep straight state, and in the external member body front end face can be located to the elasticity buckle, formed the non return card platform between external edge of external member body front end face and the elasticity buckle. The non-return clamping table is matched with the limiting clamping table, and the non-return clamping table is matched and clamped with the limiting clamping table. The elastic sleeve 2 is made of plastic. The injection needle 5 may be directly stuck to the casing head or an injection needle with a needle holder may be used.
Working process or working principle:
the front end of the core rod is provided with a piston 4, the piston 4 can adopt a rubber plug, and the core rod and the piston form a plunger.
Initial state: as shown in fig. 1, the elastic sleeve is fixed at the initial position, the check ring is located in the inner cavity of the elastic buckle, the elastic buckle is located in the inner cavity corresponding to the expansion table, the anti-shrinkage convex ring is located outside the elastic sleeve, the check block table is clamped with the limit block table, the piston is located at the bottom of the outer sleeve, and no air exists in the outer sleeve.
Pumping liquid: as shown in fig. 2 to 3, when the core rod is pulled, the check ring moves outwards along the inner cavity of the elastic sleeve, and after the check ring contacts the elastic buckle, the dosage of the liquid to be sucked does not reach the preset dosage, and the liquid needs to be continuously sucked;
as shown in fig. 4, the core rod is continuously drawn, the core rod drives the pull-back ring, and the pull-back ring drives the elastic sleeve to move until the quantitative boss is clamped into the quantitative clamping groove, so that the liquid is sucked until the dosage reaches the preset dosage. At the moment, the elastic sleeve cannot be pulled by the core rod pull-back ring, the core rod cannot move, and the liquid pumping dosage is finished to reach the preset dosage, so that quantitative pumping is realized.
Injection and self-destruction: as shown in fig. 5-6, the plunger is pushed to move forward for injection, after the check ring enters the inner cavity of the elastic sleeve, the injection is not completed, the plunger is pushed continuously, the piston reaches the bottom of the outer sleeve, and the injection is completed. At the moment, the check ring reaches the outside of the elastic buckle, the elastic buckle resets, and the check ring clamps the elastic buckle, so that the core rod cannot be pumped back, liquid cannot be pumped, and self-destruction is realized.
When the quantitative self-destruction syringe is in an initial state, the anti-shrinkage convex ring is positioned outside the elastic sleeve. After the injection is finished and the self-destruction is realized, the shrink-proof convex ring of the core rod is positioned in the inner cavity of the elastic sleeve and used for preventing the elastic sleeve from being separated due to the deformation of the quantitative clamping groove.
When the quantitative self-destruction injector is in a self-destruction state, when a larger force is applied to pull the core bar, the check ring of the core bar is blocked by the elastic buckle and cannot move, and meanwhile, after the elastic sleeve is pulled, the elastic sleeve can shrink and deform to a certain degree, the quantitative convex ring of the outer sleeve can be separated from the quantitative clamping groove, the anti-shrinkage convex ring plays a role in supporting the elastic sleeve, and the quantitative clamping groove of the elastic sleeve can be prevented from deforming greatly; meanwhile, the limiting boss of the outer sleeve provides an inward acting force for the elastic sleeve to prevent the elastic sleeve from being separated. The check ring, the shrink-proof convex ring and the limiting boss are mutually clamped under the combined action, so that the core rod and the elastic sleeve are prevented from being separated, and the safety and the effectiveness of the self-destruction state are ensured.
The description of the directions and the relative position relationship of the structures in the present invention, such as the description of the front, the back, the left, the right, the upper and the lower, does not limit the present invention, and is only for the convenience of description.
Claims (10)
1. A quantitative self-destruction syringe is characterized by comprising an outer sleeve (3), a core bar (1) and a piston (4), wherein the core bar (1) is sequentially provided with a pull-back ring (1.1) and a check ring (1.2); the opening end of the outer sleeve (3) is provided with a quantitative self-destruction clamping seat, an elastic sleeve (2) is arranged in the quantitative self-destruction clamping seat, a quantitative boss (3.4) protrudes outwards from the inner wall of the quantitative self-destruction clamping seat, and the elastic sleeve (2) is sleeved outside the core rod (1);
the elastic sleeve (2) comprises a sleeve body (2.3), an elastic buckle (2.1) arranged around the central axis is arranged at the front end of the sleeve body (2.3), a hollow positioning boss (2.6) is arranged at the rear end of the sleeve body (2.3), a quantitative clamping groove (2.5) is formed in the outer surface of the positioning boss (2.6) inwards, and the quantitative clamping groove (2.5) is matched with the quantitative boss (3.4);
the front end of the core bar (1) is provided with a pull-back ring (1.1), and the middle part of the core bar (1) is provided with a non-return ring (1.2);
initial state: the non-return ring (1.2) is arranged in the elastic sleeve (2) in an initial state; the piston (4) is jointed with the bottom of the jacket.
2. The quantitative self-destructive syringe according to claim 1, wherein the side surface of the check ring (1.2) is provided with a tapered guide slope (1.3) which is gradually increased from the front end to the rear end.
3. The quantitative self-destructive syringe according to claim 2, characterized in that the maximum outer diameter of the check ring (1.2) and the pull-back ring (1.1) is greater than the minimum inner diameter of the elastic buckle (2.1), ensuring that the check ring (1.2) can be clamped by the elastic buckle (2.1); the pull-back ring (1.1) can be ensured to be clamped and pushed by the elastic buckle (2.1).
4. The quantitative self-destructive syringe according to claim 1, wherein the quantitative notch (2.5) is formed in a ring shape, and the cross-section of the quantitative notch (2.5) is trapezoidal.
5. The quantitative self-destruction syringe according to any one of claims 1 to 4, wherein the rear end of the core rod (1) is provided with a shrink-proof collar (1.4), and the shrink-proof collar (1.4) is adapted to the inner diameter of the elastic sleeve (2).
6. The metered dose self-destruction syringe as claimed in claim 5, wherein the length between the retaining ring (1.2) and the shrink-proof collar (1.4) is smaller than the length of the elastic sleeve (2).
7. The quantitative self-destruction syringe according to claim 5, wherein the end of the open end of the quantitative self-destruction cartridge is provided with a limiting boss (3.6) protruding radially to the center of the circle, and the outer diameter of the positioning boss (2.6) is larger than the inner diameter of the limiting boss (3.6).
8. Quantitative self-destruct syringe according to claim 1, characterized in that the elastic catch (2.1) is provided with a conical shape with an external diameter increasing from the front end towards the rear end, the elastic catch (2.1) increasing from the front end towards the rear end internal diameter.
9. The quantitative self-destructive syringe according to claim 1, wherein the positioning boss (2.6) is axially provided with an elastic notch (2.4).
10. The quantitative self-destruction syringe according to claim 1, wherein an expansion table (3.2) is arranged at the front end of the quantitative self-destruction clamping seat, and the expansion table (3.2) is arranged in a manner of being matched with the elastic buckle (2.1); a limiting clamping table (3.3) is arranged between the expansion table (3.2) and the quantitative boss (3.4), and a non-return clamping table (2.2) is arranged at the front end of the sleeve part body (2.3) corresponding to the limiting clamping table (3.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110413516.9A CN113509618A (en) | 2021-04-16 | 2021-04-16 | Quantitative self-destruction syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110413516.9A CN113509618A (en) | 2021-04-16 | 2021-04-16 | Quantitative self-destruction syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113509618A true CN113509618A (en) | 2021-10-19 |
Family
ID=78062442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110413516.9A Pending CN113509618A (en) | 2021-04-16 | 2021-04-16 | Quantitative self-destruction syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113509618A (en) |
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2021
- 2021-04-16 CN CN202110413516.9A patent/CN113509618A/en active Pending
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Address after: 255086 No. 999, Zunxian Road, high tech Zone, Zibo City, Shandong Province Applicant after: Shandong ande medical supplies Co.,Ltd. Address before: No.77, North Road, development zone, high tech Zone, Zibo City, Shandong Province Applicant before: SHINVA ANDE HEALTHCARE APPARATUS Co.,Ltd. |