CN219167327U - Remaining needle for pen type injector - Google Patents
Remaining needle for pen type injector Download PDFInfo
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- CN219167327U CN219167327U CN202223555933.6U CN202223555933U CN219167327U CN 219167327 U CN219167327 U CN 219167327U CN 202223555933 U CN202223555933 U CN 202223555933U CN 219167327 U CN219167327 U CN 219167327U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
The application discloses pen type injector is with remaining needle, it includes: the needle seat assembly comprises a disc-shaped base and a barrel-shaped structure, and the soft needle tube penetrates through the disc-shaped base and is positioned outside the disc-shaped base; the guide cap assembly comprises a shell which is used for wrapping the barrel-shaped structure and is stably clamped with the disc-shaped base, and a guide needle core which is used for penetrating the barrel-shaped structure and the soft needle tube is arranged on the shell; the needle head assembly comprises a disc base, an upper barrel-shaped structure and a lower barrel-shaped structure which are respectively positioned at two sides of the disc base, wherein a metal needle tube penetrating through the needle head assembly is arranged on the disc base, and two ends of the metal needle tube are respectively positioned in the upper barrel-shaped structure and the lower barrel-shaped structure; the protective cap assembly comprises an inner shell which is used for wrapping the barrel-shaped structure and is stably clamped with the disc-shaped base, and the inner shell is clamped with the disc-shaped base after the pen-type injector is injected. The indwelling needle adopting the mode can solve the pain and discomfort caused by the puncture of the skin by the injection of the existing needle head every time, prevent other objects from touching, and is not easy to deform and polluted.
Description
Technical Field
The application relates to the technical field of medical instruments, in particular to an indwelling needle for a pen-type injector.
Background
The pen-type injector is a medical instrument used in clinical medical treatment at present, is widely used for injecting liquid medicines such as insulin, auxin, interferon and the like, and is used in a mode that a certain amount of liquid medicines are infused into subcutaneous tissues through penetrating the skin by a needle head arranged on the pen-type injector each time so as to achieve the treatment purpose.
However, when the existing needle is used, each injection needs to pierce the skin to cause pain, which brings pain to patients; at the same time, the needle is exposed, other objects are easy to touch, pollution and needle point deformation are caused, and the needle point deformation also increases skin penetration pain.
Therefore, to solve the above technical problems, how to provide a pen-type injector retention needle which can reduce pain and discomfort caused by piercing the skin with each injection of the existing needle, and can protect the needle from touching other objects and being polluted easily is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The utility model aims to provide a retention needle for a pen type injector, which can reduce pain and discomfort caused by puncturing skin for each injection of the existing needle head, and can protect the periphery of the needle point, prevent other objects from touching, and is not easy to deform and pollute.
To achieve the above object, the present application provides an indwelling needle for pen injector, comprising:
the needle seat assembly comprises a disc-shaped base and a barrel-shaped structure arranged at the center of the disc-shaped base, a soft needle tube is fixedly arranged in the barrel-shaped structure, and the soft needle tube penetrates through the disc-shaped base and is positioned at the outer side of the disc-shaped base;
the guide cap assembly comprises a shell used for wrapping the barrel-shaped structure and stably clamping the disc-shaped base, a guide needle core used for penetrating the barrel-shaped structure and the soft needle tube is arranged on the shell, and the end part of the guide needle core is positioned at the opening of the soft needle tube and used for injecting the guide needle core and the soft needle tube into subcutaneous tissues;
after the soft needle tube is injected into subcutaneous tissue, the guide cap assembly is taken down on the disc-shaped base to drive the guide needle core to be separated from the soft needle tube, and the soft needle tube is reserved in the subcutaneous tissue at the moment;
the needle head assembly comprises a disc base, an upper barrel-shaped structure and a lower barrel-shaped structure, wherein the upper barrel-shaped structure and the lower barrel-shaped structure are respectively positioned at two sides of the disc base;
wherein, after the guide cap assembly is taken down on the disc-shaped base, the lower barrel-shaped structure is sleeved on the periphery of the barrel-shaped structure, and the metal needle tube is communicated with the soft needle tube; the inner wall of the upper barrel-shaped structure is provided with an internal thread, the internal thread is used for being connected with a pen-type injector, the metal needle tube is communicated with the pen-type injector, and the pen-type injector injects injection into subcutaneous tissue through the metal needle tube and the soft needle tube;
the protective cap assembly comprises an inner shell which is used for wrapping the barrel-shaped structure and is stably clamped with the disc-shaped base, and the inner shell is clamped with the disc-shaped base after the pen-type injector is injected.
Preferably, the needle seat assembly further comprises a rubber part and a supporting part, wherein the rubber part is arranged in the barrel-shaped structure, the rubber part is positioned above the supporting part, the soft needle tube is fixedly arranged in the barrel-shaped structure through the supporting part, and the metal needle tube is communicated with the soft needle tube after penetrating through the rubber part.
Preferably, the end of the rubber part facing the supporting part is provided with a groove, the supporting part is embedded with a funnel part corresponding to the position of the groove, the end of the metal needle tube is positioned in the groove or the funnel part, the bottom of the funnel part is provided with an extension tube, and the extension tube is communicated with the soft needle tube.
Preferably, the end face of the disc-shaped base, which is away from the barrel-shaped structure, is provided with a pressure-sensitive adhesive patch which is fixedly connected with the body surface, a central hole is formed in the middle of the pressure-sensitive adhesive patch, an antibacterial piece is embedded in the central hole, and the soft needle tube penetrates through the supporting piece and the antibacterial piece respectively.
Preferably, the antibacterial member is a disc-shaped antibacterial gel.
Preferably, the top end of the metal needle tube is a slope surface, a top hole is arranged on the slope surface, a side hole is arranged at the bottom of the metal needle tube, and the top hole is communicated with the side hole through an internal channel of the metal needle tube.
Preferably, two symmetrical clamping grooves are formed in the periphery of the disc-shaped base along the circumferential direction of the disc-shaped base, first clamping keys which are correspondingly clamped with the two clamping grooves are arranged on the shell, and second clamping keys which are correspondingly clamped with the two clamping grooves are arranged on the inner shell.
Preferably, a clamping ring is arranged on the periphery of the support piece, and is clamped with the inner wall of the barrel-shaped structure and used for limiting the support piece axially.
Preferably, a through hole is formed in the end face, facing away from the disc-shaped base, of the barrel-shaped structure, and the metal needle tube penetrates through the through hole.
Preferably, the end face of the disc base facing the through hole is provided with a limiting protrusion, and when the lower barrel-shaped structure is sleeved on the periphery of the barrel-shaped structure, the limiting protrusion is embedded in the through hole.
Preferably, the inner walls of the shell and the inner shell facing the barrel-shaped structure are respectively provided with a first cylindrical wall and a second cylindrical wall, and the first cylindrical wall and the second cylindrical wall are respectively sleeved on the periphery of the barrel-shaped structure.
Preferably, the protective cap assembly further comprises an outer shell sleeved on the outer periphery of the inner shell, and the outer shell is used for wrapping the inner shell.
Preferably, the soft needle tube, the barrel-shaped structure, the guide needle core and the metal needle tube are coaxially arranged.
Compared with the background art, the indwelling needle for the pen injector of the application utilizes the guide cap assembly to inject the soft needle tube on the needle seat assembly into subcutaneous tissue, prolongs the stay time of the soft needle tube in the body, facilitates the injection of the injection liquid through the soft needle tube for multiple times, reduces the times of puncturing skin and relieves the pain of patients. Specifically, the needle seat component is arranged outside the body surface, the guide needle core on the guide cap component passes through the barrel-shaped structure and the soft needle tube, the lower end of the guide needle core is positioned at the opening of the soft needle tube, the guide needle core has the function of enhancing the integral strength of the soft needle tube, and the guide needle core cannot be bent and other cleaning conditions when entering subcutaneous tissues; the guide needle core and the lower end of the soft needle tube are inserted into subcutaneous tissues by pressing, so that the injection of the soft needle tube is completed. After the injection of the soft needle tube is completed, the guide cap assembly is taken down from the needle seat assembly, then the lower barrel-shaped structure of the needle head assembly is arranged at the barrel-shaped structure, the two structures are sleeved, two ends of the metal needle tube are respectively positioned in the upper barrel-shaped structure and the lower barrel-shaped structure, and one end of the metal needle tube is communicated with the soft needle tube; the upper barrel-shaped structure is connected with the existing pen-type injector, and the pen-type injector is communicated with the metal needle tube, so that the injector is injected into subcutaneous tissue through the soft needle tube, and injection is completed. After the injection is finished, the needle head component can be taken down, the protective cap component is clamped on the needle seat component, the protection of the needle tube is finished, and pollution is avoided. Of course, the needle hub assembly is required to be fixed to the body surface, and the soft needle cannula can stay in the subcutaneous tissue for a long time, thereby reducing the skin puncture times.
In addition, this application is still through barrel form structure, go up barrel form structure and lower barrel form structure and protect metal needle tubing and soft needle tubing, be difficult for touching other articles, be difficult for deformation and contaminated. Therefore, the retention needle for the pen-type injector, which is arranged in the mode, can solve the pain and discomfort caused by the fact that the existing needle head needs to puncture the skin every time of injection, and can protect the periphery of the needle head, prevent other objects from being touched, and is not easy to deform and polluted.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic view of a needle seat assembly arrangement of a pen needle for a syringe according to an embodiment of the present application;
fig. 2 is a schematic view of a three-dimensional arrangement of components of a hub assembly of a retention needle for a pen injector according to an embodiment of the present application;
fig. 3 is a schematic view showing the mounting structure of the cap assembly and the needle seat assembly of the indwelling needle for pen injector according to the embodiment of the present utility model;
FIG. 4 is a schematic perspective view of a needle assembly of a pen needle for a syringe according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of the internal arrangement of a needle head assembly of a pen needle for a syringe according to an embodiment of the present utility model;
fig. 6 is a schematic view of a needle assembly and hub assembly mounting structure of a pen needle retention needle for a pen injector according to an embodiment of the present application;
fig. 7 is a schematic view showing a mounting structure of a cap assembly and a needle seat assembly of an indwelling needle for a pen injector according to an embodiment of the present utility model;
fig. 8 is a schematic perspective view of a set of protective caps of a pen needle for a syringe according to an embodiment of the present disclosure.
In the figure: 10. needle hub assembly 101, disk-shaped base 102, barrel 103, soft needle cannula 104, snap groove 105, through hole 106, rubber member 107, funnel member 108, extension tube 109, support member 110, snap ring 111, antimicrobial member 112, pressure sensitive adhesive patch 113, and central bore;
20. the guide cap assembly 201, the shell 202, the guide needle core 203, the first cylindrical wall 204 and the first clamping key;
30. needle assembly 301, disk base 302, upper barrel 303, lower barrel 304, metal needle 305, limit bump 306, internal threads;
40. a protective cap assembly 401, an outer housing 402, an inner housing 403, a second cylindrical wall 404, a second snap key.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In order to better understand the aspects of the present application, a further detailed description of the present application will be provided below with reference to the accompanying drawings and detailed description.
It should be noted that, in the present embodiment, the orientation or positional relationship indicated by "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present application and simplification of the description, and is not indicative or implying that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 8, in the present embodiment, there is provided an indwelling needle for a pen injector, which basically includes a needle holder assembly 10, a guide cap assembly 20, a needle head assembly 30 and a protective cap assembly 40, the needle holder assembly 10 includes a disk-shaped base 101 and a barrel-shaped structure 102 disposed at the center of the disk-shaped base 101, as shown in fig. 1 of the specification, the barrel-shaped structure 102 is disposed in a reverse-buckle type, a soft needle tube 103 is fixedly disposed inside the barrel-shaped structure 102, and the soft needle tube 103 penetrates the disk-shaped base 101 and is located outside the disk-shaped base 101; that is, an opening is provided below the barrel structure 102 for the soft needle cannula 103 to protrude outside the disc-shaped base 101, and since the soft needle cannula 103 needs to be implanted in subcutaneous tissue, the end of the soft needle cannula 103 needs to be provided outside the disc-shaped base 101 with a certain length left.
As shown in fig. 3, the guide cap assembly 20 is used for guiding the soft needle tube 103 to be implanted into subcutaneous tissue, specifically, the guide cap assembly 20 comprises a shell 201 for wrapping the barrel-shaped structure 102 and stably clamping with the disc-shaped base 101, a guide needle core 202 for penetrating the barrel-shaped structure 102 and the soft needle tube 103 is arranged on the shell 201, and the end part of the guide needle core 202 is positioned at the opening of the soft needle tube 103 and used for injecting the guide needle core 202 and the soft needle tube 103 into the subcutaneous tissue. In addition, in order to further improve the guide cap assembly 20, the housing 201 is made of plastic, and the housing 201 and the guide pin 202 are integrally formed.
It should be noted that, during the process of injecting the soft needle tube 103 into the subcutaneous tissue, the guide needle core 202 needs to extend into the soft needle tube 103, the guide needle core 202 drives the soft needle tube 103 to act on the body surface together, and the guide needle core 202 and the soft needle tube 103 are injected into the subcutaneous tissue together by pressing; after the soft needle tube 103 is injected into subcutaneous tissue, the guide cap assembly 20 is removed from the disc-shaped base 101, so that the guide needle core 202 is driven to be separated from the soft needle tube 103, and the soft needle tube 103 is kept in the subcutaneous tissue under the action of skin tissue, so that the soft needle tube 103 is implanted.
Further, as shown in fig. 4 and 5, the needle assembly 30 includes a disc base 301, and an upper barrel structure 302 and a lower barrel structure 303 respectively located at two sides of the disc base 301, a metal needle tube 304 penetrating the disc base 301 is provided on the disc base 301, and two ends of the metal needle tube 304 are respectively located in the upper barrel structure 302 and the lower barrel structure 303; in addition, as shown in fig. 6, after the guide cap assembly 20 is removed from the disc-shaped base 101, the lower barrel-shaped structure 303 is sleeved on the periphery of the barrel-shaped structure 102, and the metal needle tube 304 is communicated with the soft needle tube 103; the inner wall of the upper barrel-shaped structure 302 is provided with an internal thread 306, the internal thread 306 is used for being connected with a pen-type injector, the metal needle tube 304 is communicated with the pen-type injector, and the pen-type injector injects injection into subcutaneous tissue through the metal needle tube 304 and the soft needle tube 103.
In addition, as shown in fig. 7 and 8, the protective cap assembly 40 includes an inner housing 402 for surrounding the barrel structure 102 and stably engaging with the disk-shaped base 101, and the inner housing 402 engages with the disk-shaped base 101 after injection of the pen injector is completed, thereby protecting the needle hub assembly 10.
In summary, in the present application, the indwelling needle for a pen injector uses the guide cap assembly 20 to inject the soft needle tube 103 on the needle seat assembly 10 into the subcutaneous tissue, and prolongs the residence time of the soft needle tube 103 in the body, so that the needle head can conveniently inject the injection through the soft needle tube 103 for multiple times, the skin puncturing frequency is reduced, and the pain of the patient is relieved. Specifically, the needle seat assembly 10 of the present application is placed outside the body surface, the guide needle core 202 on the guide cap assembly 20 passes through the barrel-shaped structure 102 and the soft needle tube 103, the lower end of the guide needle core 202 is positioned at the opening of the soft needle tube 103, the guide needle core 202 has the function of enhancing the overall strength of the soft needle tube 103, and the guide needle core cannot bend when entering subcutaneous tissue; the injection of the soft needle tube 103 is completed by pressing the guide needle 202 and the lower end of the soft needle tube 103 into the subcutaneous tissue.
After the injection of the soft needle tube 103 is completed, the guide cap assembly 20 is removed from the needle seat assembly 10, the lower barrel-shaped structure 303 of the needle head assembly 30 is installed at the barrel-shaped structure 102, the two parts are sleeved, two ends of the metal needle tube 304 are respectively positioned in the upper barrel-shaped structure 302 and the lower barrel-shaped structure 303, and one end of the metal needle tube 304 is communicated with the soft needle tube 103; the upper barrel-shaped structure 302 is connected with the existing pen-type injector, and the pen-type injector is communicated with the metal needle tube 304, so that the injector is injected into subcutaneous tissue through the soft needle tube 103, and injection is completed. After the injection is completed, the needle head assembly 30 can be removed, and the protective cap assembly 40 is clamped on the needle seat assembly 10, so that the needle tube is protected from pollution. Of course, the needle hub assembly 10 described above needs to be secured to the body surface and the soft needle cannula 103 may remain in the subcutaneous tissue for a long period of time, thereby reducing the number of skin punctures.
In addition, the metal needle tube 304 and the soft needle tube 103 are protected through the barrel-shaped structure 102, the upper barrel-shaped structure 302 and the lower barrel-shaped structure 303, and other objects are not easy to touch, and are not easy to deform and pollute. Therefore, the retention needle for the pen-type injector, which is arranged in the mode, can solve the pain and discomfort caused by the fact that the existing needle head needs to puncture the skin every time of injection, and can protect the periphery of the needle head, prevent other objects from being touched, and is not easy to deform and polluted.
In order to improve the stability of the soft needle tube 103 in the barrel structure 102, in this embodiment, the needle hub assembly 10 further includes a rubber member 106 and a supporting member, wherein the rubber member 106 is disposed above the supporting member, the soft needle tube 103 is fixedly disposed in the barrel structure 102 through the supporting member, and the metal needle tube 304 is communicated with the soft needle tube 103 after penetrating the rubber member 106.
As shown in fig. 1, the rubber member 106 is a reversely buckled cylindrical structure, a groove is arranged at the end of the rubber member 106 facing the supporting member, a funnel member corresponding to the groove is embedded in the supporting member, an extension tube communicated with the funnel member is arranged at the bottom of the funnel member, and the extension tube extends into the soft needle tube 103 and is communicated with the soft needle tube. In order to facilitate the communication effect between the metal needle tube 304 and the soft needle tube 103, the end of the metal needle tube 304 is disposed in a recess or funnel, so that the metal needle tube 304 communicates with the soft needle tube 103.
In addition, the outer wall of the bell mouth-shaped part at the upper part of the funnel part is tightly connected with the funnel-shaped inner wall of the supporting part, so that the sealing effect of the injection in the funnel part is ensured, and the injection is prevented from leaking.
The end face of the disc-shaped base 101, which is away from the barrel-shaped structure 102, is provided with a pressure-sensitive adhesive patch which is fixedly connected with the body surface, a central hole is formed in the middle of the pressure-sensitive adhesive patch, an antibacterial piece is embedded in the central hole, and the soft needle tube 103 penetrates through the supporting piece and the antibacterial piece respectively. The antibacterial member may be selected from disc-shaped antibacterial gel.
For the arrangement of the metal needle tube 304, the top end is a slope surface, and a top hole is arranged on the slope surface, so that the metal needle tube is convenient to communicate with a pen-type injector; the bottom of the metal needle tube 304 is provided with a side hole, and the top hole is communicated with the side hole through an internal channel of the metal needle tube 304, so that the pen-type injector is communicated with the soft needle tube 103.
In addition, two symmetrical clamping grooves 104 are formed in the periphery of the disc-shaped base 101 along the circumferential direction of the disc-shaped base, a first clamping key 204 which is correspondingly clamped with the two clamping grooves 104 is formed in the shell 201, and a second clamping key 404 which is correspondingly clamped with the two clamping grooves 104 is formed in the inner shell 402; the shell 201 and the inner shell 402 are respectively and stably clamped with the disc-shaped base 101 through the first clamping key 204 and the second clamping key 404, and the inner shell 402 and the shell 201 are convenient and quick to replace due to the fact that the clamping mode is adopted for connection.
In order to further improve the stabilizing effect of the support frame, a clamping ring is arranged on the periphery of the support piece and is clamped with the inner wall of the barrel-shaped structure 102, interference fit is achieved, axial limiting of the support piece is achieved, and the stabilizing effect of all parts inside the barrel-shaped structure 102 is guaranteed.
The end surface of the barrel-shaped structure facing away from the disc-shaped base 101 is provided with a through hole 105, and the metal needle tube 304 penetrates through the through hole 105 and then penetrates through the rubber member 106. In addition, a limiting protrusion 305 is disposed on the end surface of the disc base 301 facing the through hole 105, and when the lower barrel-shaped structure 303 is sleeved on the periphery of the barrel-shaped structure 102, the limiting protrusion 305 is embedded in the through hole 105, so as to enhance the connection stability of the needle assembly 30 and the needle seat assembly 10.
Of course, in order to further improve the stability of the housing 201 and the inner housing 402 on the disc-shaped base 101, a first cylindrical wall 203 and a second cylindrical wall 403 are respectively disposed on the inner walls of the housing 201 and the inner housing 402 facing the barrel-shaped structure 102, and the first cylindrical wall 203 and the second cylindrical wall 403 are respectively sleeved on the outer periphery of the barrel-shaped structure 102; of course, the inner diameter for the first 203 and second 403 cylindrical walls may be the same as the outer diameter of the barrel 102 to achieve a tight fit.
It should be noted that, when the inner shell 402 cannot completely encapsulate the barrel structure 102, the outer shell 401 may be sleeved on the outer periphery of the inner shell 402, and the inner shell 402 may be completely encapsulated by the outer shell 401, thereby completely encapsulating the barrel structure 102.
In addition, in order to facilitate the correspondence between the guide needle 202 and the soft needle 103, the metal needle 304 and the soft needle 103 may be coaxially disposed with respect to the soft needle 103, the barrel structure 102, the guide needle 202, and the metal needle 304; of course, there may be various options for the actual setting mode, which will not be described in detail here, so as to ensure that the technical solution of the present application can be implemented.
In addition, to further illustrate the effect of the present application, during use, the introducer cap assembly 20 is placed over the needle hub assembly 10 and the introducer needle 202 is placed through the rubber 106 into the funnel and soft needle cannula 103, with the cylindrical structure of the introducer cap assembly 20 being placed over the barrel 102. And then the first clamping key 204 on the guide cap assembly 20 and the clamping groove 104 on the needle seat assembly 10 are mutually matched and fastened, and at the moment, the needle point at the lower end of the guide needle core 202 of the guide cap assembly 20 is positioned outside the opening at the lower end of the soft needle tube 103.
The above components are then mounted on the body surface, the needle seat component 10 is fixed with the skin through the pressure sensitive adhesive, the lower section of the soft needle tube 103 and the lower section of the guide needle core 202 are positioned in subcutaneous tissue, and the antibacterial component is disc-shaped antibacterial gel which is adhered to the skin around the soft needle tube 103; removing the snap-fit connection between the cap assembly 20 and the hub assembly 10 and removing the cap assembly 20; the protective cap assembly 40 is then sleeved on the needle seat assembly 10, and the second clamping key 404 on the protective cap assembly 40 is matched and fastened with the clamping groove 104 on the needle seat assembly 10.
The upper end of the needle assembly 30 is screw-mounted on the pen-type injector cartridge holder for use.
The lower end of a metal needle tube 304 of the needle head assembly is aligned with the barrel-shaped structure 102 to be sleeved downwards, when the lower end of the metal needle tube 304 is sleeved with the barrel-shaped structure 102, the needle point of the metal needle tube 304 pierces and pierces the rubber piece 106, the needle point of the metal needle tube 304 enters a central cavity formed by the rubber piece 106 and the funnel piece together, and the needle point and the side hole of the metal needle tube 304 are positioned in the central cavity and are communicated with the central cavity; at this time, the rubber piston of the cartridge in the pen injector can be driven to introduce the liquid medicine therein into the central cavity along the metal needle tube 304, and then into the subcutaneous tissue along the funnel and the soft needle tube 103, thereby completing the injection. The needle tip of the needle does not pass through the skin in the process, so that pain is not caused, after the injection is finished, the pen type injector and the needle assembly 30 are pulled out from the needle seat assembly 10 together, and the rubber piece 106 has elasticity to close the pierced needle hole, so that blood backflow and liquid medicine leakage can be effectively prevented.
The second cylindrical wall 403 of the cap assembly 40 is then aligned with the barrel 102 on the hub assembly 10 and rotated appropriately to snap the second snap-fit key 404 into engagement with the snap-fit groove 104 on the hub assembly 10, thereby providing a ready-to-use condition.
The injection is repeated in this way, so that the pain caused by the injection penetrating through the skin is reduced, and the design purpose is achieved.
It should be noted that in this specification relational terms such as first and second are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
Claims (13)
1. An indwelling needle for pen injector, comprising:
the needle seat assembly comprises a disc-shaped base and a barrel-shaped structure arranged at the center of the disc-shaped base, a soft needle tube is fixedly arranged in the barrel-shaped structure, and the soft needle tube penetrates through the disc-shaped base and is positioned at the outer side of the disc-shaped base;
the guide cap assembly comprises a shell used for wrapping the barrel-shaped structure and stably clamping the disc-shaped base, a guide needle core used for penetrating the barrel-shaped structure and the soft needle tube is arranged on the shell, and the end part of the guide needle core is positioned at the opening of the soft needle tube and used for injecting the guide needle core and the soft needle tube into subcutaneous tissues;
after the soft needle tube is injected into subcutaneous tissue, the guide cap assembly is taken down on the disc-shaped base to drive the guide needle core to be separated from the soft needle tube, and the soft needle tube is reserved in the subcutaneous tissue at the moment;
the needle head assembly comprises a disc base, an upper barrel-shaped structure and a lower barrel-shaped structure, wherein the upper barrel-shaped structure and the lower barrel-shaped structure are respectively positioned at two sides of the disc base;
wherein, after the guide cap assembly is taken down on the disc-shaped base, the lower barrel-shaped structure is sleeved on the periphery of the barrel-shaped structure, and the metal needle tube is communicated with the soft needle tube; the inner wall of the upper barrel-shaped structure is provided with an internal thread, the internal thread is used for being connected with a pen-type injector, the metal needle tube is communicated with the pen-type injector, and the pen-type injector injects injection into subcutaneous tissue through the metal needle tube and the soft needle tube;
the protective cap assembly comprises an inner shell which is used for wrapping the barrel-shaped structure and is stably clamped with the disc-shaped base, and the inner shell is clamped with the disc-shaped base after the pen-type injector is injected.
2. The pen needle assembly according to claim 1, wherein the needle hub assembly further comprises a rubber member and a support member disposed within the barrel structure, the rubber member is disposed above the support member, the soft needle cannula is fixedly disposed within the barrel structure by the support member, and the metal needle cannula is in communication with the soft needle cannula after penetrating the rubber member.
3. The pen injector needle according to claim 2, wherein the end of the rubber member facing the support member is provided with a groove, the support member is embedded with a funnel member corresponding to the position of the groove, the end of the metal needle tube is positioned in the groove or the funnel member, and the bottom of the funnel member is provided with an extension tube, and the extension tube is communicated with the soft needle tube.
4. The pen injector needle as claimed in claim 3, wherein the end surface of the disc-shaped base, which is away from the barrel-shaped structure, is provided with a pressure-sensitive adhesive patch for fixedly connecting with the body surface, a central hole is formed in the middle of the pressure-sensitive adhesive patch, an antibacterial member is embedded in the central hole, and the soft needle tube penetrates through the supporting member and the antibacterial member respectively.
5. The pen injector needle as in claim 4, wherein the antiseptic element is a disc-shaped antiseptic gel.
6. The pen injector needle as claimed in any one of claims 2-5, wherein the top end of the metal needle tube is a slope surface, a top hole is arranged on the slope surface, a side hole is arranged at the bottom of the metal needle tube, and the top hole is communicated with the side hole through an internal channel of the metal needle tube.
7. The pen injector needle according to any one of claims 2 to 5, wherein two symmetrical locking grooves are formed in the periphery of the disc-shaped base along the circumferential direction of the disc-shaped base, first locking keys which are correspondingly locked with the two locking grooves are formed in the shell, and second locking keys which are correspondingly locked with the two locking grooves are formed in the inner shell.
8. The pen injector needle as in claim 7, wherein a snap ring is disposed on the outer periphery of the support member, the snap ring being engaged with the inner wall of the barrel structure for axially limiting the support member.
9. The pen needle according to claim 7, wherein a through hole is formed in an end surface of the barrel-shaped structure facing away from the disc-shaped base, and the metal needle tube penetrates through the through hole.
10. The pen injector needle as claimed in claim 9, wherein an end surface of the disc base facing the through hole is provided with a limit protrusion, and the limit protrusion is embedded in the through hole when the lower barrel structure is sleeved on the periphery of the barrel structure.
11. The pen needle according to claim 7, wherein the inner walls of the housing and the inner housing facing the barrel structure are respectively provided with a first cylindrical wall and a second cylindrical wall, and the first cylindrical wall and the second cylindrical wall are respectively sleeved on the outer periphery of the barrel structure.
12. The pen needle according to claim 11, wherein the protective cap assembly further comprises an outer housing, the outer housing being disposed around the inner housing for wrapping the inner housing.
13. The pen injector needle as in any one of claims 8-12, wherein the soft needle cannula, barrel, guide needle core, and metal needle cannula are coaxially disposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223555933.6U CN219167327U (en) | 2022-12-29 | 2022-12-29 | Remaining needle for pen type injector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223555933.6U CN219167327U (en) | 2022-12-29 | 2022-12-29 | Remaining needle for pen type injector |
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| Publication Number | Publication Date |
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| CN219167327U true CN219167327U (en) | 2023-06-13 |
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| CN202223555933.6U Active CN219167327U (en) | 2022-12-29 | 2022-12-29 | Remaining needle for pen type injector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI846556B (en) * | 2023-08-02 | 2024-06-21 | 百騰科技股份有限公司 | Fixed device for injection units |
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2022
- 2022-12-29 CN CN202223555933.6U patent/CN219167327U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI846556B (en) * | 2023-08-02 | 2024-06-21 | 百騰科技股份有限公司 | Fixed device for injection units |
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