CN217593519U - Prefilled syringe with leading guard shield fills effect syringe - Google Patents
Prefilled syringe with leading guard shield fills effect syringe Download PDFInfo
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- CN217593519U CN217593519U CN202220613978.5U CN202220613978U CN217593519U CN 217593519 U CN217593519 U CN 217593519U CN 202220613978 U CN202220613978 U CN 202220613978U CN 217593519 U CN217593519 U CN 217593519U
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Abstract
The utility model belongs to the technical field of the syringe, especially, relate to a embedment syringe in advance with leading guard shield. The utility model discloses a needle, syringe section of thick bamboo to and the needle cover, needle file unit, and protection casing unit have played the cladding syringe needle and do not cover the technical effect on cylinder surface simultaneously. The utility model has the advantages of it is following: firstly, the movable range of the protective cover is near the needle of the injector, so that the sight of an operator for observing liquid medicine through the needle cylinder is not influenced, and the light inspection is not influenced; secondly, the axial position of the protective cover can be adjusted through push-pull action, the protective cover is used for exposing the needle head to complete injection, and the needle head is coated and discarded after the injection is finished, so that the phenomenon that others are injured by a needle is avoided; thirdly, when the protective cover is opened, the limiting ring can be clamped between the rib piece and the retraction end head to fix the position of the protective cover; fourthly, the demoulding groove is designed on the limiting ring, so that the limiting ring is separated from a grinding tool when the limiting ring is manufactured, a larger expansion space is provided for the limiting ring, and the limiting ring can conveniently cross the rib piece and is clamped with the retraction end.
Description
Technical Field
The utility model belongs to the technical field of the syringe, especially, relate to a embedment syringe in advance with leading guard shield.
Background
A syringe is a medical device used for injecting liquid medicine into a human body or for cleaning purposes, and is often provided with a needle when used for injection into a human body. Because need fill the medicine in the syringe before the injection, the mode of traditional filling medicine is with needle point insert the liquid medicine of extraction in the medicine bottle, but does to waste time and energy like this, and extravagant medicine, so the prefilled syringe has appeared in the market at present, fills the medicine in the syringe in advance through embedment equipment, and when the syringe actually used like this, inside has been equipped with the medicine, uses labour saving and time saving.
However, after the syringe is used, the syringe needs to be discarded, the needle exposed outside has a risk of injuring people, and the blood and bacteria remained on the needle can cause infection in the process of injuring people, so how to ensure that the needle is not exposed during the discarding process of the syringe becomes a problem which needs to be solved urgently in the preparation process of the syringe, in the prior art, a protective cover is generally used for covering the needle when the syringe is discarded, for example, chinese patent publication No. CN1913933B, published as 2012-12-26 discloses a medical device which comprises a protective system and the syringe connected to the protective system, wherein the protective system comprises a syringe bracket and a protective cover which is connected to the bracket in a sliding manner. The spring urges the shield from the retracted position to the extended position. Stop members are provided on the holder and shield for maintaining the shield in the retracted position. The syringe is slidably connected to the holder and extends within the shield. Axial movement of the syringe relative to the holder causes disengagement of the stop member, thereby allowing the spring to move the shield to the extended position. The detents are provided on the holder for holding the shield in the extended position, reducing the risk of needle stick injury.
However, the protective cover part of the invention utilizes the spring to move, and the spring is surrounded on the syringe, thereby influencing the sight of a user for observing the liquid medicine in the syringe and further influencing the judgment of the user on the state of the liquid medicine in the syringe.
On the other hand, the embedment device need be fixed the cylinder when adding the medicine process to filling syringe in advance, and this kind of protection casing design that appears on the cylinder has influenced embedment device's fixed process to a certain extent, leads to adding medicine process unstability.
In view of the above, there is a need for a syringe shield apparatus that covers the needle without covering the surface of the barrel.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a embedment syringe in advance with leading guard shield, the utility model discloses a needle, a syringe section of thick bamboo to and the needle cover, needle file unit, and the protection casing unit has played the technological effect that does not cover the cylinder surface when the cladding syringe needle.
The utility model provides a technical scheme that above-mentioned problem adopted is: a pre-filled syringe with a forward shield comprising a needle, a syringe barrel, and a needle hub, further comprising a needle hub unit, and a shield unit, wherein:
the needle, the syringe barrel, the needle sleeve, the needle seat unit and the protective cover unit are coaxially arranged;
the protective cover unit comprises a lower stop part and an upper stop part;
the lower stop piece is close to the far end side of the protective cover unit, and the upper stop piece is close to the near end side of the protective cover unit;
the minimum inner diameters of the lower stop piece and the upper stop piece are smaller than the maximum outer diameter of the syringe barrel, and the minimum inner diameter of the upper stop piece is also smaller than the maximum outer diameter of the needle seat unit;
when the shield unit is open, the upper stop member inner diameter may expand such that its minimum inner diameter is greater than the maximum outer diameter of the syringe barrel.
The further preferred technical scheme is as follows: the protective cover unit further comprises a stop member, wherein:
the stop part is positioned between the lower stop part and the upper stop part;
the minimum inner diameter of the stop part is smaller than the maximum outer diameter of the needle seat unit;
when the shield unit is opened, the stopper inner diameter may expand such that its smallest inner diameter is larger than the largest outer diameter of the needle hub unit.
The further preferred technical scheme is as follows: the protection casing unit includes the protection casing main part to and end the position hook, wherein:
the far end of the stop hook is connected with the near end of the protective cover main body;
the near end of the stop hook is attached to one side of the near end of the maximum outer diameter position of the needle seat unit.
The further preferred technical scheme is as follows: the protection casing unit still includes the spacing ring, wherein:
the limiting ring is arranged at the far end of the protective cover main body;
the near end of the limiting ring is attached to one side of the far end of the maximum outer diameter position of the syringe barrel.
The further preferred technical scheme is as follows: the stop hook comprises an elastic piece and a clamping piece; wherein:
the distal end of the elastic element is arranged on the proximal end of the protective cover main body;
the clamping piece is arranged at the proximal end of the elastic piece;
the far end of the clamping piece is attached to one side of the near end of the maximum outer diameter position of the needle seat unit.
The further preferred technical scheme is as follows: the pre-filled syringe with a front shield further comprising a retraction tip, wherein:
the retraction end is arranged at the far end of the syringe barrel and is used for installing the needle seat unit;
the retraction tip distal end has a ramp that allows the catch to clear the retraction tip when the shield body is opened.
The further preferred technical scheme is as follows: the stop hook further comprises a proximal end bevel, wherein;
the near-end inclined plane is arranged at the near end of the clamping piece, and when the protective cover main body is opened, the clamping piece can cross the retraction end.
The further preferred technical scheme is as follows: the needle hub unit includes a needle mounting member, and a rib member, wherein:
the needle is mounted on the proximal end of the needle mount;
the fin member is mounted on the distal end of the needle mount;
the far end of the rib piece is attached to the near end of the stop piece;
the near end of the convex rib piece is attached to the far end of the clamping piece.
The further preferred technical scheme is as follows: the maximum outer diameter of the rib piece is smaller than the maximum outer diameter of the retraction end.
The further preferred technical scheme is as follows: the protection casing unit still includes the drawing of patterns groove, wherein:
the demolding groove is arranged on the limiting ring;
the demolding groove provides a retraction space for the limiting ring when the inner diameter is expanded.
The further preferred technical scheme is as follows: the protective cover unit further comprises a cantilever member, wherein:
the far end of the cantilever part is arranged on the near end of the protective cover main body;
when the shield body is closed, the proximal end of the cantilever member abuts the distal end of the rib member.
The further preferred technical scheme is as follows: the needle stand unit further comprises a recessed groove; wherein:
the recessed groove is provided on the needle mount.
The further preferred technical scheme is as follows: the protective cover unit further comprises a fingertip groove; wherein:
the fingertip groove is arranged at the far end of the protective cover main body;
the fingertip groove is used for opening the protective cover main body and is used for holding force by pinching finger bellies.
The further preferred technical scheme is as follows: the protective cover unit also comprises a force guide protruding strip; wherein:
the force guide protruding strips are arranged on the bottom surface of the inner side of the fingertip groove;
the force guide protruding strips are used for improving the friction resistance when fingers are held by fingers.
The utility model has the advantages of it is following:
first, the range of motion of the shield is near the needle of the syringe, does not affect the operator's view of observing the liquid medicine through the syringe, does not affect the light inspection.
Secondly, the axial position of the protective cover can be adjusted through the push-pull action, the needle head is exposed to complete injection, and the needle head is coated and discarded after the injection is finished, so that the phenomenon that others are injured by the needle is avoided.
Thirdly, when the protective cover is opened, the limiting ring can be clamped between the rib piece and the retraction end head to stably fix the position of the protective cover.
Fourthly, the demoulding groove is designed on the limiting ring, so that the limiting ring is separated from the grinding tool during manufacturing, and the limiting ring is provided with a larger expansion space so as to be convenient to pass over the convex rib piece, and the convex rib piece is clamped between the convex rib piece and the retraction end.
Drawings
Fig. 1 is an exploded view of the overall structure of the injector of the present invention.
Fig. 2 is a schematic structural view of the middle protective cover unit of the present invention when closed.
Fig. 3 is a schematic structural view of the middle protective cover unit when the protective cover unit is opened.
Fig. 4 isbase:Sub>A cross-sectional view of fig. 2 taken along linebase:Sub>A-base:Sub>A.
Fig. 5 is a schematic structural view of the middle protective cover unit of the present invention.
In the drawings, the reference numerals designate the following components: the syringe comprises a needle seat unit 1, a protective cover unit 2, a needle sleeve 3, a retraction end 4, a syringe barrel 5, a needle 6, a needle mounting piece 101, a rib piece 102, a concave groove 103, a protective cover main body 201, a stop hook 202, a limiting ring 203, a demoulding groove 204, a cantilever piece 205, a fingertip groove 206, a force guide convex strip 207, an elastic piece 202a, a clamping piece 202b and a proximal end inclined surface 202c.
Detailed Description
Defining:
1. a far end: towards one end of the needle.
2. Near end: the end of the syringe remote from the needle.
3. Axis: refers to a component having a symmetrical cross-section, taken along the line connecting the centroids of all its cross-sections.
4. Opening: the fingers are able to expose the needle or needle sheath during operation.
5. Closing: the fingers can cover the needle or needle sheath during operation.
6. Sleeving: refers to the act of mounting the first component on the outer surface of the second component when the inner diameter of the first component is greater than the outer diameter of the second component.
7. Setting: refers to any means for joining two parts together by bonding, snapping, welding, screwing, placing, etc.
8. Jacking: the first finger component exerts a force on the second component, so that the second component moves towards the direction opposite to the position of the first component.
The following description is merely exemplary of the present invention and is not intended to limit the scope of the present invention.
Example (b): 1-5, a pre-filled syringe with a forward shield comprises a needle 6, a syringe barrel 5, and a needle hub 3, and further comprises a needle hub unit 1, and a shield unit 2, wherein:
the needle 6, the syringe barrel 5, the needle sleeve 3, the needle seat unit 1 and the protective cover unit 2 are coaxially arranged;
the protective cover unit 2 comprises a lower stop part and an upper stop part;
the lower stop piece is close to the far end side of the protective cover unit 2, and the upper stop piece is close to the near end side of the protective cover unit 2;
the minimum inner diameters of the lower stop piece and the upper stop piece are both smaller than the maximum outer diameter of the syringe barrel 5, and the minimum inner diameter of the upper stop piece is also smaller than the maximum outer diameter of the needle seat unit 1;
when the shield unit 2 is open, the upper stop inner diameter may expand such that its smallest inner diameter is larger than the largest outer diameter of the syringe barrel 5.
In this embodiment, the "front" means that the protective cover unit 2 is located at the distal end of the syringe body without covering the syringe barrel 5 at the proximal end of the syringe body, the needle 6 and the syringe barrel 5 constitute the main parts of the syringe, the needle hub unit 1 is located at the distal end of the syringe barrel 5 and is sleeved with the needle 6 through a hole opened along the axis thereof, so that the liquid medicine in the syringe barrel 5 can flow out of the needle 6 through the hole in the needle hub unit 1. After liquid medicine is filled in a syringe barrel 5 of the pre-filled syringe, a push rod is arranged at an opening at the near end of the syringe barrel to complete the whole assembly of the syringe, and the needle sleeve 3 is sleeved on the needle seat unit 1 and used for carrying out coating type sealing on the needle 6 to prevent bacteria from entering and avoid the risk of leakage of the liquid medicine.
In addition, when the needle sheath 3 is covered on the needle 6, the shield unit 2 is installed on the needle base unit 1, at this time, the upper stop member is clamped in a clamping groove formed between the maximum outer diameter position of the needle base unit 1 and the far end of the syringe barrel 5, and the shield unit 2 is pushed forcefully, so that the upper stop member is subjected to radial force, and is radially expanded until the minimum inner diameter is larger than the maximum outer diameter of the syringe barrel 5, and the shield unit 2 can axially move to the outer annular surface of the syringe barrel 5.
In addition, when the shield unit 2 axially moves towards the proximal end to a closed state, the lower stop piece is clamped with the maximum outer diameter position of the needle seat unit 1, at the moment, the shield unit 2 stops moving, the syringe barrel 5 is prevented from being shielded, the moving range of the shield unit 2 is limited near the needle 6, and the sight line of an inspector is not influenced in the light inspection process.
In addition, when the pharmaceutical factory takes the product before filling, the protective cover unit 2 is in a position covering the needle base unit 1, and the syringe barrel 5 is not shielded, so that the light inspection process after filling is not influenced, and the nurse does not influence the nurse to visually inspect the medicine and check the scale when the nurse takes the product after filling.
The pre-filled syringe was used as follows:
s1, pushing the protective cover unit 2 towards the axial near-end direction until the lower stop piece is attached to the maximum outer diameter position of the needle seat unit 1;
s2, pulling out the needle sleeve 3 along the axial direction, and completing the injection process;
s3, the protective cover unit 2 is pushed towards the axial far-end direction, so that the upper stop piece is attached to the maximum outer diameter position of the needle seat unit 1, and at the moment, the needle 6 is completely coated by the protective cover unit 2.
The protective cover unit 2 further comprises a stop member, wherein:
the stop part is positioned between the lower stop part and the upper stop part;
the minimum inner diameter of the stop part is smaller than the maximum outer diameter of the needle seat unit 1;
when the shield unit 2 is open, the stopper inner diameter may expand such that its smallest inner diameter is larger than the largest outer diameter of the needle hub unit 1.
In this embodiment, the protection cover unit 2 starts to be pushed in S1, and when the protection cover unit 2 is pushed in S3, the stop member and the upper stop member are respectively attached to the distal end and the proximal end of the maximum outer diameter of the needle holder unit 1, so as to clamp the distal end and the proximal end, thereby achieving the fixing effect of the protection cover unit 2.
Furthermore, in S1, in order to push the shield unit 2, it is necessary to apply an external force to the stopper so as to radially expand it to pass over the maximum outer diameter of the needle holder unit 1, and thus it is known that in S3, after the stopper passes over the maximum outer diameter of the needle holder unit 1, the shield unit 2 is maintained in a closed position without applying an external force, thereby covering the needle 6 to prevent exposure to the wound.
The shield unit 2 includes a shield main body 201, and a stop hook 202, wherein:
the distal end of the stop hook 202 is connected with the proximal end of the protective cover main body 201;
the proximal end of the stop hook 202 is attached to the proximal end side of the maximum outer diameter position of the needle holder unit 1.
In the present embodiment, the shield body 201 is a main component that covers the needle 6, and can switch the covered state among the needle 6, the needle hub unit 1, and the syringe barrel 5 in the axial direction.
The stop hook 202 is an expression of the stop element, a radially downwardly extending engaging element is provided at a proximal end of the stop hook 202 for engaging with one side of a proximal end of the maximum outer diameter of the needle holder unit 1, the stop hook 202 further includes a proximal end connected to the engaging element, and a distal end connected to a proximal end of the shield body 201, and when the shield body 201 is pushed in step S1, the elastic element is radially expanded by a jacking force from an outer circumferential surface of the syringe barrel 5, so as to drive the engaging element to radially expand to engage with a surface of the syringe barrel 5.
In S3, when the shield body 201 is pushed back, only one finger is required to push the engaging member while holding the syringe barrel 5, so as to push the shield body 201 to move axially and complete the covering of the needle 6, when the stopper passes over the maximum outer diameter of the hub unit 1, a "click" is heard to indicate that the engagement is successful, and the needle 6 is completely covered and can be discarded without visual confirmation.
The protective cover unit 2 further comprises a stop collar 203, wherein:
the limiting ring 203 is arranged at the far end of the protective cover main body 201;
the proximal end of the limiting ring 203 is attached to the distal end side of the maximum outer diameter position of the syringe barrel 5.
In this embodiment, the limiting ring 203 is a form of the lower stop member, and is integrally formed with the shield main body 201, so that the limiting ring does not hurt hands in the pushing process, and the annular fitting manner makes the limiting ring more firmly pressed against the distal side of the maximum outer diameter of the syringe barrel 5, and the limiting ring does not pass over the distal side of the maximum outer diameter of the syringe barrel 5 due to deformation, so that the shield main body 201 continues to move axially and proximally, thereby shielding the syringe barrel 5.
The stop hook 202 comprises an elastic member 202a and an engaging member 202b; wherein:
the distal end of the elastic element 202a is arranged on the proximal end of the protective cover main body 201;
the snap member 202b is disposed on the proximal end of the elastic member 202 a;
the distal end of the engaging member 202b abuts against the proximal end of the needle holder unit 1 at the maximum outer diameter.
In the embodiment of S1, when the stop hook 202 receives a radial force, the elastic element 202a expands radially outward to drive the engaging element 202b to release the engaging state of the proximal end side of the maximum outer diameter of the needle holder unit 1, and the elastic element 202a has a tendency of retracting radially inward after expanding outward, so that the engaging element 202b is tightly attached to the outer annular surface of the syringe barrel 5 to generate a certain friction force, which makes the shield main body 201 fixed relative to the syringe barrel 5 without an axial pushing force, thereby facilitating an operator to use the needle 6 to inject in S2.
The pre-boot for a pre-filled syringe further comprises a retraction tip 4, wherein:
the retraction tip 4 is arranged at the distal end of the syringe barrel 5 and is used for mounting the needle hub unit 1;
the distal end of the retraction tip 4 has a bevel that allows the catch 202b to clear the retraction tip 4 when the shield body 201 is opened.
In the embodiment S1, when the shield main body 201 is pushed axially, the radial force applied to the stop hook 202 is derived from a radially outward component force generated by the inclined surface pushing up the proximal end of the engaging member 202b, so as to urge the elastic member 202a to expand radially outward.
Further, the inclined surface forms a groove with the proximal side of the maximum outer diameter portion of the needle holder unit 1, and the groove can engage with the engaging piece 202b at the initial position of the shield body 201 in S1 and the final position of the shield body 201 in S3, and at the same time, cooperate with the stopper to jack up the distal end surface of the maximum outer diameter portion of the needle holder unit 1, so that the shield body 201 is fixed at the position covering the needle 6.
The stop hook 202 further includes a proximal bevel 202c, wherein;
the proximal ramp 202c is disposed proximal to the catch 202b to allow the catch 202b to clear the retraction tip 4 when the shield body 201 is open.
In this embodiment, the slope of the proximal slope 202c is the same as the slope of the slope, in S1, when the shield body 201 is pushed axially, the proximal slope 202c and the slope are attached together, and when the slope is fixed, the proximal slope 202c can easily go over the slope, thereby avoiding the situation that the engaging member 202b is locked in the groove.
The needle hub unit 1 includes a needle mount 101, and a rib 102, wherein:
the needle 6 is mounted on the proximal end of the needle mount 101;
the fin member 102 is mounted on the distal end of the needle mount 101;
the far end of the rib member 102 is clamped with the near end of the stop member;
the proximal end of the rib member 102 abuts the distal end of the engagement member 202 b.
In this embodiment, the needle mount 101 includes the opening therein, which is in communication with the syringe barrel 5, and the needle 6 is mounted in the opening, so that at S3, the prefilled medical fluid in the syringe barrel 5 can flow out of the needle 6 through the opening to complete the injection.
Furthermore, the rib 102 is a representation of the maximum outer diameter of the needle holder unit 1, the proximal end face of the rib 102 and the distal end face of the retraction tip 4 form the groove, the rib 102 is of an annular structure, so that the distal end face of the engaging member 202b always abuts against the proximal end face of the rib 102 at the initial position of the shield body 201 in S1 and the final position of the shield body 201 in S3 no matter how the shield body 201 rotates, no matter how the shield body 201 rotates
The maximum outer diameter of the rib member 102 is less than the maximum outer diameter of the retraction tip 4. Wherein:
when the shield body 201 is open, the stop collar 203 expands in diameter to clear the ridge 102 and fit over the distal end of the retraction tip 4.
In this embodiment, the stop collar 203 has a certain range of elasticity, but the elasticity is not enough to expand the minimum inner diameter of the stop collar 203 to be larger than the maximum outer diameter of the retraction tip 4, i.e. the stop collar 203 cannot go over the retraction tip 4 to the outer annular surface of the shield body 201, so during the S1 process, there are three design schemes according to the maximum inner diameter of the stop collar 203:
in a first design, the minimum inner diameter of the stop collar 203 is smaller than the maximum outer diameter of the rib member 102, and the elasticity of the stop collar 203 is insufficient to expand the minimum inner diameter of the stop collar 203 to be larger than the maximum outer diameter of the rib member 102, so that the proximal end face of the stop collar 203 abuts against the distal end face of the rib member 102 when the shield body 201 moves to the final position in the process of S1.
In a second design, the minimum inner diameter of the stop collar 203 is smaller than the maximum outer diameter of the rib 102, but the elasticity of the stop collar 203 can make the minimum inner diameter of the stop collar 203 expand to be larger than the maximum outer diameter of the rib 102, so that the stop collar 203 will pass over the rib 102 and be clamped in the groove between the rib 102 and the retraction tip 4 when the shield body 201 moves to the final position in the process of S1.
In a third design, the minimum inner diameter of the limiting ring 203 is larger than the maximum outer diameter of the rib member 102, so that when the shield body 201 moves to the final position in the S1 process, the proximal end face of the limiting ring 203 is attached to the distal end face of the retraction tip 4.
Under the second design scheme, the fixing effect is better when the protective cover main body 201 moves to the final position in the S1 process, and the second design scheme is the preferred design scheme of the limit ring 203.
The protective cover unit 2 further comprises a stripping groove 204, wherein:
the demolding groove 204 is arranged on the limiting ring 203;
the demolding groove 204 gives a retraction space when the inner diameter of the retainer ring 203 is enlarged.
In this embodiment, the retainer ring 203 needs to be prepared by a mold in the product manufacturing process, the retainer ring 203 has a protruding structure for jacking up the rib 102 inside the ring, and the protruding structure is in an inverted buckle shape, but the mold cannot be really made, and in order to form the protruding structure, only a forced demolding method can be adopted, so that the risk is that the product shell of the retainer ring 203 may be broken, and after the demolding groove 204 is formed in the retainer ring 203, a retraction space is provided for the retainer ring 203 during demolding, so that the toughness of the shell structure is increased, and the risk that the product is broken in the forced demolding process is reduced.
In addition, in the second design of the retainer ring 203, the demolding grooves 204 give the retainer ring 203 a larger retraction space, that is, the elasticity of the retainer ring 203 is increased, so that the retainer ring can easily get over the rib 102 to be clamped in the groove.
The protective cover unit 2 further comprises a cantilever member 205, wherein:
the distal end of the cantilever member 205 is arranged on the proximal end of the shield main body 201;
when the shield body 201 is closed, the cantilever member 205 snaps proximally over the distal end of the rib member 102.
In this embodiment, the cantilever member 205 is a representation of the stop member, and the distal end surface thereof is a vertical plane, which can lift the proximal end surface of the rib member 102, so that the shield body 201 will not move axially in the proximal direction in the lifted state.
The needle hub unit 1 further comprises a recessed groove 103; wherein:
the concave groove 103 is provided on the needle mount 101.
In this embodiment, the concave groove 103 is axially formed on the needle mounting member 101, so that the needle mounting member 101 forms a cross-shaped structure, which can avoid the problem of injection shrinkage when the temperature of the mold is too high or too low, and can realize material meat reduction and reduce the overall weight of the injector.
The protective cover unit 2 further comprises a fingertip groove 206; wherein:
the fingertip groove 206 is arranged at the far end of the protective cover main body 201;
the fingertip groove 206 is used for holding the force of the fingers when the protective cover main body 201 is opened.
In this embodiment, under the second design of the stop collar 203, in order to make the stop collar 203 pass over the protruding rib 102, a larger axial force needs to be applied to the shield main body 201, but the surface of the shield main body 201 is smoother and does not exert force well, and once the finger slides, there is a risk of pricking the needle 6, so that the fingertip groove 206 is provided, and the finger of the user can abut against the inner side surface of the fingertip groove 206, so as to exert force.
The protective cover unit 2 further comprises a force guide convex strip 207; wherein:
the force guide protruding strips 207 are arranged on the bottom surface of the inner side of the fingertip groove 206;
the force guide protruding strips 207 are used for improving the friction resistance when the fingers are held by the fingers.
In this embodiment, the bottom surface of the inner side of the fingertip groove 206 is still smooth, and in order to improve the frictional resistance, the bottom surface of the inner side of the fingertip groove 206 is provided with a plurality of force-guiding protruding strips 207, generally three, which can be more firmly attached to the bottom surface of the inner side of the fingertip groove 206 in the pinching process of the user's finger, so that the dislocation phenomenon is not generated.
An assembly of a pre-filled syringe with a front shield includes an injection piston, and an injection plunger mounted on the injection piston by a bayonet action.
In this embodiment, the injection piston is used for pushing out the liquid medicine in the syringe barrel 5 to complete the injection process, and the injection push rod is a device for pushing the injection piston.
A method of assembling an assembly of pre-filled syringes with a front shield, comprising the steps of:
a. the needle sheath 3 is first mounted in the shield unit 2 and the distal end of the needle sheath 3 is lifted up against the stop hook 202.
b. The shield unit 2 is mounted on the needle mount 101 with the needle hub 3 telescoped over the needle 6.
In this embodiment, when the needle sheath 3 lifts the stop hook 202, i.e. is mounted in a predetermined position, the protective cover unit 2 is mounted on the needle mount 101, and a gripping device is additionally used to align the needle sheath 3 with the needle 6 and push the needle sheath 3 to be mounted on the needle 6, thereby completing the sealing.
A method of drug potting an assembly of pre-filled syringes with a front shield, comprising the steps of:
a. vertically placing the syringe barrel 5, and filling the syringe barrel 5 with a liquid medicine so that the liquid level is perpendicular to the inner side surface of the syringe barrel 5;
b. the injection piston is placed into the syringe barrel 5 by a sleeve, and no air is left between the injection piston and the liquid level of the medicine;
c. the injection plunger is inserted into the syringe barrel 5 and mounted on the injection piston.
In this embodiment, the purpose of the liquid level of the liquid drug being perpendicular to the inner side of the syringe barrel 5 during drug infusion is to allow for the next step of mounting the injection plunger without air remaining between the liquid level of the drug.
In addition, the injection piston is installed in the sleeve in a compressed state, which means that a gap is left between the sleeve and the syringe barrel 5 for discharging gas, and the injection piston is installed behind the syringe barrel 5, and the diameter of the injection piston is expanded and is abutted to the inner side surface of the syringe barrel 5, so that the effect of 'medicine encapsulation' is realized.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art. These are non-inventive modifications, which are intended to be protected by patent laws within the scope of the appended claims.
Claims (14)
1. A pre-filled syringe with a front shield comprising a needle (6), a syringe barrel (5), and a needle sheath (3), characterized by a needle hub unit (1), and a shield unit (2), wherein:
the needle (6), the syringe barrel (5), the needle sleeve (3), the needle seat unit (1) and the protective cover unit (2) are coaxially arranged;
the protective cover unit (2) comprises a lower stop part and an upper stop part;
the lower stop piece is close to the far end side of the protective cover unit (2), and the upper stop piece is close to the near end side of the protective cover unit (2);
the minimum inner diameters of the lower stop piece and the upper stop piece are both smaller than the maximum outer diameter of the syringe barrel (5), and the minimum inner diameter of the upper stop piece is also smaller than the maximum outer diameter of the needle seat unit (1);
when the shield unit (2) is open, the upper stop inner diameter is expandable such that its smallest inner diameter is larger than the largest outer diameter of the syringe barrel (5).
2. The pre-filled syringe with a front shield according to claim 1, characterized in that the shield unit (2) further comprises a stop member, wherein:
the stop part is positioned between the lower stop part and the upper stop part;
the minimum inner diameter of the stop part is smaller than the maximum outer diameter of the needle seat unit (1);
when the protective cover unit (2) is opened, the stop part inner diameter can expand, so that the minimum inner diameter is larger than the maximum outer diameter of the needle seat unit (1).
3. The pre-filled syringe with a front shield according to claim 2, characterized in that the shield unit (2) comprises a shield body (201), and a stop hook (202), wherein:
the far end of the stop hook (202) is connected with the near end of the protective cover main body (201);
the near end of the stop hook (202) is attached to one side of the near end of the position with the maximum outer diameter of the needle seat unit (1).
4. The pre-filled syringe with a front shield according to claim 3, characterized in that the shield unit (2) further comprises a stop collar (203), wherein:
the limiting ring (203) is arranged at the far end of the protective cover main body (201);
the proximal end of the limiting ring (203) is attached to one side of the distal end of the maximum outer diameter position of the syringe barrel (5).
5. The pre-filled syringe with a front shield according to claim 3, wherein the stop hook (202) comprises a resilient member (202 a), and a snap member (202 b); wherein:
the distal end of the elastic piece (202 a) is arranged on the proximal end of the protective cover main body (201);
the clamping piece (202 b) is arranged on the proximal end of the elastic piece (202 a);
the far end of the clamping piece (202 b) is attached to one side of the near end of the position with the largest outer diameter of the needle seat unit (1).
6. The pre-filled syringe with a front shield according to claim 5, further comprising a retraction tip (4), wherein:
the retraction end head (4) is arranged at the far end of the syringe barrel (5) and is used for installing the needle seat unit (1);
the far end of the retraction end head (4) is provided with a slope, when the protective cover main body (201) is opened, the snap piece (202 b) is enabled to pass over the retraction end head (4).
7. The pre-filled syringe with a front shield of claim 6, wherein the stop hook (202) further comprises a proximal bevel (202 c), wherein;
the proximal bevel (202 c) is disposed proximal to the catch (202 b) such that the catch (202 b) passes over the retraction tip (4) when the shield body (201) is opened.
8. The pre-filled syringe with a front shield according to claim 6, wherein the needle hub unit (1) comprises a needle mount (101), and a fin (102), wherein:
the needle (6) is mounted on the proximal end of the needle mount (101);
the fin member (102) is mounted on the distal end of the needle mount (101);
the far end of the rib piece (102) is jointed with the near end of the stop piece;
the near end of the rib piece (102) is jointed with the far end of the clamping piece (202 b).
9. The pre-filled syringe with forward shield of claim 8, wherein the maximum outer diameter of the fin member (102) is less than the maximum outer diameter of the retraction tip (4).
10. The pre-filled syringe with a front shield according to claim 4, characterized in that the shield unit (2) further comprises a demolding groove (204), wherein:
the demolding groove (204) is arranged on the limiting ring (203);
the demoulding groove (204) gives a retraction space when the inner diameter of the limit ring (203) is enlarged.
11. The pre-filled syringe with a front shield according to claim 8, characterized in that the shield unit (2) further comprises a cantilever member (205), wherein:
the distal end of the cantilever part (205) is arranged on the proximal end of the protective cover main body (201);
when the shield body (201) is closed, the cantilever part (205) is abutted to the far end of the rib part (102) at the near end.
12. The pre-filled syringe with a front shield according to claim 8, characterized in that the needle hub unit (1) further comprises a recessed groove (103); wherein:
the recessed groove (103) is provided on the needle mount (101).
13. A pre-filled syringe with front shield according to claim 3, characterized in that the shield unit (2) further comprises a fingertip recess (206); wherein:
the fingertip groove (206) is arranged at the far end of the protective cover main body (201);
the fingertip groove (206) is used for holding force by pinching finger bellies when the protective cover main body (201) is opened.
14. The pre-filled syringe with a front shield according to claim 13, characterized in that the shield unit (2) further comprises a force-guiding ledge (207); wherein:
the force guide protruding strip (207) is arranged on the bottom surface of the inner side of the fingertip groove (206);
the force guide protruding strips (207) are used for improving the friction resistance when the fingers are pinched by the finger bellies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220613978.5U CN217593519U (en) | 2022-03-21 | 2022-03-21 | Prefilled syringe with leading guard shield fills effect syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220613978.5U CN217593519U (en) | 2022-03-21 | 2022-03-21 | Prefilled syringe with leading guard shield fills effect syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217593519U true CN217593519U (en) | 2022-10-18 |
Family
ID=83563893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220613978.5U Withdrawn - After Issue CN217593519U (en) | 2022-03-21 | 2022-03-21 | Prefilled syringe with leading guard shield fills effect syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217593519U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023179178A1 (en) * | 2022-03-21 | 2023-09-28 | 上海新耀湃科医疗科技股份有限公司 | Prefilled syringe with front shield |
| WO2023217044A1 (en) * | 2022-05-07 | 2023-11-16 | 上海新耀湃科医疗科技股份有限公司 | Needle protection type pre-filled barrel, assembly comprising same, mounting method for assembly, and method of use of assembly |
-
2022
- 2022-03-21 CN CN202220613978.5U patent/CN217593519U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023179178A1 (en) * | 2022-03-21 | 2023-09-28 | 上海新耀湃科医疗科技股份有限公司 | Prefilled syringe with front shield |
| WO2023217044A1 (en) * | 2022-05-07 | 2023-11-16 | 上海新耀湃科医疗科技股份有限公司 | Needle protection type pre-filled barrel, assembly comprising same, mounting method for assembly, and method of use of assembly |
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Granted publication date: 20221018 Effective date of abandoning: 20230725 |