CN221106627U - Spiral protective cap with vent hole for prefilled syringe - Google Patents
Spiral protective cap with vent hole for prefilled syringe Download PDFInfo
- Publication number
- CN221106627U CN221106627U CN202322002835.8U CN202322002835U CN221106627U CN 221106627 U CN221106627 U CN 221106627U CN 202322002835 U CN202322002835 U CN 202322002835U CN 221106627 U CN221106627 U CN 221106627U
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- China
- Prior art keywords
- protective cap
- side wall
- cap
- exhaust hole
- hole
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- 230000001681 protective effect Effects 0.000 title claims abstract description 149
- 229940071643 prefilled syringe Drugs 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000004856 capillary permeability Effects 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 10
- 238000003780 insertion Methods 0.000 abstract description 7
- 230000037431 insertion Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 13
- 239000003814 drug Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a spiral protective cap with an exhaust hole for a pre-filling and sealing injector, which relates to the technical field of protective caps of pre-filling and sealing injector, and comprises an inner protective cap and an outer protective cap which are nested inside and outside, wherein one end of the inner protective cap is provided with a needle insertion hole, the side wall of the inner protective cap is provided with a first exhaust hole, the first exhaust hole is communicated with the bottom of the needle insertion hole through a capillary permeability pipe, and a guide structure and an anti-falling structure are matched between the outer side wall of the inner protective cap and the inner side wall of the outer protective cap; one end of the outer protective cap is provided with a threaded connecting groove, the threaded connecting groove and the needle plug-in hole are positioned at the same end, the other end of the outer protective cap is provided with a second exhaust hole, and the inner side wall of the outer protective cap is provided with an elastic ball mechanism corresponding to the first exhaust hole. The problem that the protective cap used in the prefilled syringe in the prior art cannot guarantee the sealing effect simultaneously and cannot solve the problem that air in the protective cap is pressed back into the syringe in the process of installing the protective cap in place is solved.
Description
Technical Field
The utility model relates to the technical field of prefilled syringe caps, in particular to a spiral cap with an exhaust hole for a prefilled syringe.
Background
The prefilled syringe is a novel medicine packaging material, which corresponds to a common medicine packaging container when storing medicines and corresponds to a common syringe when using. The needle is inserted into the liquid outlet end of the syringe for integral storage, and the needle is separated from the syringe for storage. After filling needle type, the liquid outlet end of the needle cylinder is required to be provided with a protective cap after filling and sealing the liquid outlet end of the needle cylinder, so that the pollution to the liquid outlet end of the needle cylinder or the needle head is prevented. The outside of the liquid outlet end of the conventional needle cylinder is provided with a threaded ring for threaded connection with the protective cap, and most of threads of the threaded ring are arranged outside the threaded ring, and a few of threads of the threaded ring are arranged inside the threaded ring.
The Chinese patent publication No. CN112755328A discloses a prefilled syringe protective cap, a preparation method and a device thereof, wherein the protective cap comprises a protective cap body, and an anti-adhesive layer for preventing the protective cap from adhering to the injection end is arranged on the contact surface of the protective cap body and the injection end of the syringe. In this scheme, it does not set up the exhaust hole on the helmet, in the stage after installing the helmet on the syringe and just about to install the helmet in place thoroughly to the final stage of installing in place, form comparatively sealed space between helmet and the cylinder at this stage, the gaseous unable normal exhaust in the cavity between helmet and the syringe liquid outlet end at this stage, therefore the gaseous in the cavity will be got into in the cylinder through liquid outlet end back pressure, the medicine of extra entering air influence prefilled in the cylinder is deposited.
Disclosure of utility model
Aiming at the defects in the background technology, the utility model provides the spiral protective cap with the exhaust holes for the pre-filling and sealing syringe, which solves the problems that the protective cap used in the pre-filling and sealing syringe in the prior art cannot ensure the sealing effect at the same time and cannot solve the problem that air in the protective cap is back-pressed into a syringe in the process of installing the protective cap in place.
The technical scheme of the utility model is realized as follows: the spiral protective cap with the vent holes for the prefilled syringe comprises an inner protective cap and an outer protective cap which are nested inside and outside, wherein a needle insertion hole is formed in one end of the inner protective cap, a first vent hole is formed in the side wall of the inner protective cap, the first vent hole is communicated with the bottom of the needle insertion hole through a capillary vent pipe, and a guide structure and an anti-falling structure are matched between the outer side wall of the inner protective cap and the inner side wall of the outer protective cap; one end of the outer protective cap is provided with a threaded connecting groove, the threaded connecting groove and the needle plug-in hole are positioned at the same end, the other end of the outer protective cap is provided with a second exhaust hole, and the inner side wall of the outer protective cap is provided with an elastic ball mechanism corresponding to the first exhaust hole.
Preferably, the inner protective cap is of a cylindrical structure, the needle plug hole comprises a frustum-shaped hole arranged at the end face of the inner protective cap, and an inlet of the capillary permeability cell is arranged at the bottom of the frustum-shaped hole and is positioned at the axis.
Preferably, the first exhaust hole is arranged at the lower part of the outer side wall of the inner protective cap, and a gap is reserved between the inner side wall of the outer protective cap and the outer side wall of the inner protective cap.
Preferably, the guide structure comprises a guide strip arranged on the outer side wall of the inner protective cap, and a guide groove in sliding fit with the guide strip is arranged on the inner side wall of the outer protective cap. The guide bars are at least two and are arranged on the outer side wall of the inner protective cap in a central symmetry way.
Preferably, the anti-falling structure comprises an anti-falling block fixedly arranged on the inner side wall of the outer protective cap, and a sliding groove in sliding fit with the anti-falling block is arranged on the outer side wall of the inner protective cap.
Preferably, the threaded connection groove comprises an annular groove formed in the end face of the outer protective cap, and threads are arranged on the inner annular surface or the outer annular surface of the annular groove.
Preferably, the second exhaust hole is arranged at the axis of the end face of the outer protective cap, a baffle block is arranged in the second exhaust hole, and the baffle block can be abutted against the end face of the inner protective cap during installation.
Preferably, the elastic ball mechanism comprises a ring block fixedly arranged on the inner side wall of the outer protective cap, a ball is arranged in the ring block in a sliding manner, a spring is arranged between the bottom of the ball and the inner side wall of the outer protective cap, an anti-falling flange matched with the ball is arranged at the edge of the ring block, and the ball can roll along the surface of the inner protective cap along with the sliding of the outer protective cap relative to the inner protective cap and can be pressed on the first exhaust hole under the action of the spring. The outer side wall of the outer protective cap is provided with anti-skid patterns.
The utility model has the beneficial effects that: the utility model discloses an replace the interior helmet and outer helmet that inside and outside nest set up with conventional helmet, utilize interior helmet and the play liquid end of cylinder to be connected earlier during the installation to utilize the capillary permeability cell that sets up on interior helmet to discharge in advance the air in the interior helmet, avoid conventional helmet to be about to the gas back pressure in the helmet when in place in the installation, utilize the screw connection groove of outer helmet to be connected with the cylinder afterwards, fasten and lock interior helmet simultaneously, establish the first exhaust hole that the capillary permeability cell is connected when outer helmet is installed in place to establish the elasticity ball mechanism on outer helmet and seal, avoid the cylinder to leak gas from first exhaust hole department, thereby play sealed effect. The problem that the protective cap used in the prefilled syringe in the prior art cannot guarantee the sealing effect simultaneously and cannot solve the problem that air in the protective cap is pressed back into the syringe in the process of installing the protective cap in place is solved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model, the drawings that are required for the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic view of the inner and outer helmets of the present utility model;
FIG. 2 is a schematic view of the inner and outer helmets according to another aspect of the present utility model;
FIG. 3 is a schematic view of the inner cap structure of the present utility model;
FIG. 4 is a schematic cross-sectional view of the inner cap of the present utility model;
FIG. 5 is a schematic view of the outer cap structure of the present utility model;
FIG. 6 is a view showing the inner and outer caps of the present utility model in use connected to a syringe;
FIG. 7 is a schematic cross-sectional view of the elastic ball mechanism of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, 2, 3, 4 and 6, embodiment 1, a spiral protective cap with vent hole for prefilled syringe, which comprises an inner protective cap 1 and an outer protective cap 2 nested inside and outside, wherein a needle insertion hole 3 is formed at one end of the inner protective cap 1, a first vent hole 4 is formed in the side wall of the inner protective cap 1, and the first vent hole 4 is communicated with the bottom of the needle insertion hole 3 through a capillary ventilation tube 5. In the embodiment, the capillary permeability pipe 5 is arranged inside the inner protective cap, and the pipe diameter of the capillary permeability pipe is less than or equal to 0.5mm. The guide structure and the anti-falling structure are matched between the outer side wall of the inner protective cap 1 and the inner side wall of the outer protective cap 2, the guide structure plays a role in guiding the inner protective cap in sliding when the outer protective cap is installed, and the anti-falling structure can prevent the outer protective cap from falling off from the inner protective cap when the outer protective cap is not installed. One end of the outer protective cap 2 is provided with a threaded connecting groove 6, the threaded connecting groove 6 and the needle plug hole 3 are positioned at the same end, the other end of the outer protective cap 2 is provided with a second exhaust hole 8, and the inner side wall of the outer protective cap 2 is provided with an elastic ball mechanism corresponding to the first exhaust hole 4. In the uninstalled state, the elastic ball mechanism abuts against the outer side wall of the inner protective cap.
When the outer protective cap is in an initial state, the outer protective cap and the inner protective cap are in a state of least coincidence, the inner protective cap is pinched or clamped during installation to be connected with the liquid outlet end of the needle cylinder, in this process, air in the inner protective cap is discharged in advance through the capillary ventilation pipe arranged on the inner protective cap, the back pressure of air in the protective cap when the conventional protective cap is about to be installed in place is avoided, the threaded connecting groove of the outer protective cap is subsequently utilized to be connected with the threaded ring of the needle cylinder, the outer protective cap and the inner protective cap are in a state of most coincidence when the outer protective cap is installed in place, the first exhaust hole connected with the capillary ventilation pipe is sealed by the elastic ball mechanism arranged on the outer protective cap, the needle cylinder is prevented from leaking air from the first exhaust hole, the sealing effect is achieved, the sealing and the exhaust aim is finally achieved, and meanwhile the outer protective cap is used for fastening and locking the inner protective cap.
In embodiment 2, on the basis of embodiment 1, the inner cap 1 has a cylindrical structure, the needle insertion hole 3 includes a frustum-shaped hole 7 provided at the end face of the inner cap 1, and the inlet of the capillary permeability tube 5 is provided at the bottom of the frustum-shaped hole and at the axis. The first exhaust hole 4 is arranged at the lower part of the outer side wall of the inner protective cap 1, so that after the inner protective cap is installed in place, the first exhaust hole is closed by the elastic ball mechanism in the process that the outer protective cap moves and is about to be in place and the threaded connection process of the needle cylinder is finished, meanwhile, the first exhaust hole is arranged at the lower part of the outer side wall of the inner protective cap, the elastic ball mechanism is correspondingly arranged at the lower part of the inner side wall of the outer protective cap, in the uninstalled state and the whole installation process, the elastic ball mechanism can be in contact fit with the outer side wall of the inner protective cap all the time, a gap is reserved between the inner side wall of the outer protective cap 2 and the outer side wall of the inner protective cap 1, and sliding and gas discharging are facilitated.
As shown in fig. 5, in embodiment 3, on the basis of embodiment 4, the guide structure includes a guide bar 9 provided on the outer side wall of the inner cap 1, and the inner side wall of the outer cap 2 is provided with a guide groove 10 slidably engaged with the guide bar 9. At least two guide strips 9 are arranged and are arranged on the outer side wall of the inner protective cap 1 in a central symmetry way. In this embodiment, the guide groove and the guide bar are all four, and are respectively arranged on the outer side wall of the inner helmet and the inner side wall of the outer helmet in a central symmetry manner. Because a gap is reserved between the inner side wall of the outer protective cap 2 and the outer side wall of the inner protective cap 1, the height of the guide strip is larger than the gap so as to meet the matching relation of the guide strip and the guide groove. After the inner protective cap is connected with the liquid outlet end of the needle cylinder, the outer protective cap is close to the liquid outlet end under the guiding action of the guide strip, when the threaded connecting groove 6 of the outer protective cap is connected with the threaded ring of the needle cylinder, the outer protective cap drives the inner protective cap to circumferentially rotate through the matching of the guide groove and the guide strip, and meanwhile, the outer protective cap continuously slides relative to the inner protective cap along with the threaded connecting groove 6 connected with the threaded ring of the needle cylinder until the outer protective cap is installed in place.
Embodiment 4, on the basis of embodiment 3, the anti-falling structure comprises an anti-falling block 11 fixedly arranged on the inner side wall of the outer protective cap 2, and a sliding groove 12 in sliding fit with the anti-falling block 11 is arranged on the outer side wall of the inner protective cap 1. In this embodiment, the sliding groove 12 is a long waist hole formed on the outer side wall of the inner protective cap and axially arranged along the inner protective cap, the anti-falling block is a cylinder fixed on the inner side of the outer protective cap, and after the inner protective cap is installed, the outer protective cap moves from the outer end to the liquid outlet end close to the syringe needle cylinder, at this time, the anti-falling block slides in the sliding groove. When the protective cap is disassembled, the outer protective cap moves to the outer end, the anti-falling block slides in the chute, the outer protective cap is separated from the needle cylinder and then is pulled outwards continuously, and the inner protective cap is taken down from the needle cylinder under the connection of the anti-falling block.
In embodiment 5, on the basis of embodiment 4, the threaded connection groove 6 comprises an annular groove 13 formed on the end face of the outer protective cap 2, and threads are formed on the inner ring surface and the outer ring surface of the annular groove 13. In the prior art, the outside of the liquid outlet end of a conventional needle cylinder is provided with a threaded ring for threaded connection with a protective cap, most of threads of the threaded ring are arranged outside the threaded ring, and a small number of threads of the threaded ring are arranged inside the threaded ring, so that the outer protective cap in the embodiment has two specifications, namely threads on the inner annular surface and the outer annular surface of the annular groove, so that a threaded connection groove can be connected with the threaded ring of the needle cylinder during installation.
The second exhaust hole 8 is arranged at the end surface axis of the outer protective cap 2, a baffle block 14 is arranged in the second exhaust hole 8, and the baffle block 14 can be abutted against the end surface of the inner protective cap 1 during installation. In this embodiment, keep off the body piece setting in the second exhaust hole, when outer helmet is in place with the relative interior helmet installation, keep off the body piece and can contradict on interior helmet to exert pressure to interior helmet, avoid its not hard up, can also be with outer helmet installation in the time of coming in place outer helmet gas in through the second exhaust hole discharge simultaneously, avoid being difficult to the exhaust air and can't install in place because of the outer helmet existence or get into in the cylinder through first exhaust hole back pressure when elastic ball mechanism does not seal first exhaust hole completely. In addition, the outer side wall of the outer protective cap 2 is provided with anti-skid patterns. Anti-slip lines are arranged, so that the anti-slip device is convenient to hold during installation and disassembly.
As shown in fig. 7, in embodiment 6, on the basis of embodiment 5, the elastic ball mechanism comprises a ring block 15 fixedly arranged on the inner side wall of the outer cap 2, a ball 16 is arranged in the ring block 15 in a sliding manner, a spring 17 is arranged between the bottom of the ball 16 and the inner side wall of the outer cap 2, an anti-drop flange 18 matched with the ball is arranged at the edge of the ring block 15, and the ball 16 can roll along the surface of the inner cap 1 along with the sliding of the outer cap 2 relative to the inner cap 1 and can be pressed on the first exhaust hole 4 under the action of the spring 17. In this embodiment, after the outer cap is connected to the inner cap, the ball abuts against the sidewall of the inner cap, and at this time, the spring is compressed, and when the ball moves to correspond to the first exhaust hole, the ball is pushed by the restoring force of the spring to press the first exhaust hole and seal it.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a spiral helmet of taking exhaust hole for prefilled syringe which characterized in that: the novel disposable safety helmet comprises an inner helmet (1) and an outer helmet (2) which are nested inside and outside, wherein a needle plug hole (3) is formed in one end of the inner helmet (1), a first exhaust hole (4) is formed in the side wall of the inner helmet (1), the first exhaust hole (4) is communicated with the bottom of the needle plug hole (3) through a capillary ventilation pipe (5), and a guide structure and an anti-falling structure are matched between the outer side wall of the inner helmet (1) and the inner side wall of the outer helmet (2); one end of the outer protective cap (2) is provided with a threaded connecting groove (6), the threaded connecting groove (6) and the needle plug hole (3) are positioned at the same end, the other end of the outer protective cap (2) is provided with a second exhaust hole (8), and the inner side wall of the outer protective cap (2) is provided with an elastic ball mechanism corresponding to the first exhaust hole (4).
2. The screw cap with vent for a pre-filled syringe of claim 1, wherein: the inner protective cap (1) is of a cylindrical structure, the needle plug hole (3) comprises a frustum-shaped hole (7) arranged at the end face of the inner protective cap (1), and an inlet of the capillary permeability pipe (5) is arranged at the bottom of the frustum-shaped hole (7) and is positioned at the axis.
3. The screw cap with vent for a pre-filled syringe of claim 2, wherein:
The first exhaust hole (4) is arranged at the lower part of the outer side wall of the inner protective cap (1), and a gap is reserved between the inner side wall of the outer protective cap (2) and the outer side wall of the inner protective cap (1).
4. The screw cap with vent for a pre-filled syringe of claim 3, wherein: the guide structure comprises a guide strip (9) arranged on the outer side wall of the inner protective cap (1), and a guide groove (10) which is in sliding fit with the guide strip (9) is formed in the inner side wall of the outer protective cap (2).
5. The screw cap with vent for a pre-filled syringe of claim 4, wherein: at least two guide strips (9) are arranged and are arranged on the outer side wall of the inner protective cap (1) in a central symmetry mode.
6. The screw cap with vent hole for pre-filled syringe of claim 5, wherein: the anti-falling structure comprises an anti-falling block (11) fixedly arranged on the inner side wall of the outer protective cap (2), and a sliding groove (12) in sliding fit with the anti-falling block (11) is arranged on the outer side wall of the inner protective cap (1).
7. The screw cap with vent for a pre-filled syringe of claim 6, wherein: the threaded connecting groove (6) comprises an annular groove (13) formed in the end face of the outer protective cap (2), and threads are formed in the inner annular surface or the outer annular surface of the annular groove (13).
8. The screw cap with vent for a pre-filled syringe of claim 7, wherein: the second exhaust hole (8) is arranged at the end face axis of the outer protective cap (2), a baffle block (14) is arranged in the second exhaust hole (8), and the baffle block (14) can be abutted against the end face of the inner protective cap (1) during installation.
9. The screw cap with vent hole for pre-filled syringe according to any one of claims 1 to 8, wherein: the elastic ball mechanism comprises a ring block (15) fixedly arranged on the inner side wall of the outer protective cap (2), a ball (16) is arranged in the ring block (15) in a sliding manner, a spring (17) is arranged between the bottom of the ball (16) and the inner side wall of the outer protective cap (2), an anti-falling flange (18) matched with the ball is arranged at the edge of the ring block (15), and the ball (16) can roll along the surface of the inner protective cap (1) along with the sliding of the outer protective cap (2) relative to the inner protective cap (1) and can be pressed on the first exhaust hole (4) under the action of the spring (17).
10. The vented spiral cap for a pre-filled syringe of claim 9, wherein: the outer side wall of the outer protective cap (2) is provided with anti-skid patterns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322002835.8U CN221106627U (en) | 2023-07-28 | 2023-07-28 | Spiral protective cap with vent hole for prefilled syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322002835.8U CN221106627U (en) | 2023-07-28 | 2023-07-28 | Spiral protective cap with vent hole for prefilled syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221106627U true CN221106627U (en) | 2024-06-11 |
Family
ID=91373820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322002835.8U Active CN221106627U (en) | 2023-07-28 | 2023-07-28 | Spiral protective cap with vent hole for prefilled syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221106627U (en) |
-
2023
- 2023-07-28 CN CN202322002835.8U patent/CN221106627U/en active Active
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