CN214860463U - Nasal cavity drug delivery device - Google Patents

Abstract

The utility model provides a nasal cavity device of dosing, including the unit of dosing, the unit of dosing includes the syringe, portable and rotationally install the push rod in the syringe and install the ware of dosing on the syringe top, the bottom of syringe has set firmly all to keeping away from the spacing boss of a spacing boss of dosing ware orientation extension and the spacing boss of secondary, and the bottom of the spacing boss of secondary is higher than the bottom of a spacing boss, and spacing boss of a spacing boss and secondary are in the upwards distribution of week of syringe, and the periphery of push rod is equipped with the stop portion that is located the syringe outside. When the drug is administered, the push rod is pushed, and quantitative drug administration during one-time drug administration is realized through the abutting matching of the stop part and the one-time limiting boss; afterwards, promote the push rod again behind the rotatory push rod, quantitative when realizing the secondary through the butt cooperation of backstop portion and the spacing boss of secondary dosing doses to nasal cavity each quantitative once about can realizing, its quantitative precision is high, and easy operation, has better convenient to use degree.

Description

Nasal cavity drug delivery device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a nasal cavity device of dosing.

Background

Currently, nasal drug delivery devices typically include an injector, a pushrod, a needle cannula, and a drug delivery device, the needle cannula and the drug delivery device being mountable at the end of the injector, whereby drug uptake or drug delivery is achieved by movement of the pushrod within the injector. Further, when the nasal cavity administration device is used for administration, the left and right nasal cavities need to be administered once respectively, namely, the nasal cavity administration device needs to be administered twice. However, the conventional nasal administration device has the defects that the administration dose cannot be quantified or the quantification precision is low when the administration is performed once respectively to the left and right nasal cavities; meanwhile, the operations of medicine suction and medicine administration can still be carried out after the secondary medicine administration is finished, so that the repeated use by other people cannot be prevented, and the risk of cross infection exists.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a nasal cavity drug delivery device, which can conveniently perform secondary dosing and has high dosing precision.

In order to achieve the purpose, the utility model provides a nasal cavity drug delivery device, including the unit of dosing, the unit of dosing includes the syringe, can move and install the push rod in the syringe and install the ware of dosing at the syringe top in the rotationally, the bottom of syringe sets firmly has the primary spacing boss and the secondary spacing boss that all extend to the direction of keeping away from the ware of dosing, the bottom of secondary spacing boss is higher than the bottom of primary spacing boss, primary spacing boss and secondary spacing boss are in the dislocation distribution in the circumference of syringe, the periphery of push rod is equipped with the stop portion that is located the syringe outside; when the administration unit is used for one-time administration, the stop part can be abutted and matched with the one-time limiting boss; when the administration unit is used for secondary administration, the stop part can be in butt fit with the secondary limiting boss.

Further, the periphery of the push rod is provided with an axially extending through groove at the stop part, and the through groove allows a primary limit boss on the injector to pass through.

Further, nasal cavity device of dosing still includes inhales the medicine unit, inhale the medicine unit including the needle tubing syringe and the push rod, needle tubing and ware of dosing all can dismantle with the syringe and be connected.

Furthermore, the top end of the injector is provided with an external thread connecting section, the needle tube is provided with a first internal thread connecting section and a first through hole positioned at the first internal thread connecting section, the medicine feeder comprises an atomizer shell and an atomizer arranged on the atomizer shell and far away from the top end of the injector, and the atomizer shell is provided with a second internal thread connecting section and a second through hole positioned at the second internal thread connecting section;

when the nasal cavity administration device is assembled into the medicine suction unit, the external thread connecting section of the injector extends into the first through hole of the needle tube and is in threaded connection with the first internal thread connecting section of the needle tube;

when the nasal cavity administration device is assembled into the administration unit, the external thread connecting section of the injector extends into the second through hole of the atomizer shell and is in threaded connection with the second internal thread connecting section of the atomizer shell.

Furthermore, the nasal cavity drug delivery device also comprises a separation handle, the drug delivery device comprises an atomizer shell and an atomizer which is arranged on the atomizer shell and is far away from the top end of the injector, the separation handle is arranged in the atomizer shell and is positioned at the bottom end of the atomizer, the push rod comprises a first connecting section, a second connecting section and a plurality of breakpoint connecting parts, a connecting convex part is arranged at the bottom end of the first connecting section, a connecting groove for accommodating the connecting convex part is arranged at the top end of the second connecting section, and the connecting convex part is fixedly connected with the groove wall of the connecting groove through the plurality of breakpoint connecting parts; after the administration unit finishes the secondary administration, the top end of the first connecting section extends into the blocking handle and is clamped with the blocking handle.

Furthermore, a plurality of buckles protruding inwards are fixedly arranged on the inner circumferential surface of the partition handle, through hole parts are formed on the inner circumferences of the buckles, and inverted clamping parts are arranged at the top ends of the first connecting sections and can penetrate through the through hole parts of the partition handle and be clamped with the buckles.

Further, the top end of the first connecting section is a sphere part, the sphere part is at most 1/2 spheres, and the inverted clamping part is arranged at the bottom end of the sphere part.

Furthermore, a butyl rubber plug is fixed on the outer peripheral surface of the first connecting section, which is close to the second connecting section, and the butyl rubber plug is in interference fit with the inner peripheral surface of the injector.

Further, the push rod is an integrally formed part.

Further, the syringe is an integrally formed part.

As mentioned above, the nasal cavity drug delivery device of the present invention has the following beneficial effects:

when the drug is administered, the push rod is pushed, and quantitative drug administration during one-time drug administration is realized through the abutting matching of the stop part and the one-time limiting boss; afterwards, promote the push rod again behind the rotatory push rod, quantitative when realizing the secondary through the butt cooperation of backstop portion and the spacing boss of secondary dosing doses to nasal cavity each quantitative once about can realizing, its quantitative precision is high, and easy operation, has better convenient to use degree.

Drawings

Fig. 1 is a schematic view of the structure of the inhalation unit of the nasal drug delivery device of the present application.

Fig. 2 is a schematic view of the structure of the delivery unit of the nasal delivery device of the present application.

Fig. 3 is an enlarged view of a frame a of fig. 2.

Fig. 4 is a schematic view of the structure of the syringe of the nasal delivery device of the present application.

Fig. 5 is a schematic view of the structure of the pushrod of the nasal delivery device of the present application.

Fig. 6 is a schematic view of the structure of the needle cannula of the nasal delivery device of the present application.

Fig. 7 is a schematic view of the applicator of the nasal delivery device of the present application.

Fig. 8 is a schematic view of the structure of the blocking handle of the nasal delivery device of the present application.

Description of the element reference numerals

10 Syringe

11 primary limit boss

12 secondary limiting boss

13 liquid medicine cavity

14 external thread connecting section

20 push rod

21 stop part

22 first connection section

221 connecting projection

222 reverse clamping part

223 sphere part

23 second connection section

231 connecting groove

24 break point connection

30 medicine feeder

40 needle tube

41 first female connection section

42 first through hole

50 needle tube protective cover

60 atomizer outer casing

61 second female connection section

62 second through hole

63 handle connecting section

70 atomizer

80 partition handle

81 fastener

90 butyl rubber plug

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered as the scope of the present invention without substantial changes in the technical content.

The present application provides a nasal delivery device, in the following examples, the "top end" refers to the upper end of the view shown in figures 1 and 2 and the "bottom end" refers to the lower end of the view shown in figures 1 and 2. Further, as shown in fig. 2, the nasal cavity administration device according to the present application includes an administration unit including a syringe 10, a push rod 20 movably and rotatably installed in the syringe 10, and an administration instrument 30 installed at a tip end of the syringe 10; as shown in fig. 2 to 4, the bottom end of the syringe 10 is fixedly provided with a primary limiting boss 11 and a secondary limiting boss 12 both extending downward in a direction away from the administration device 30, the bottom end of the secondary limiting boss 12 is higher than the bottom end of the primary limiting boss 11, that is: the bottom end of the secondary limiting boss 12 is positioned above the bottom end of the primary limiting boss 11, and the primary limiting boss 11 and the secondary limiting boss 12 are distributed in a staggered manner in the circumferential direction of the injector 10; as shown in fig. 2, 3 and 5, a stopper 21 is fixed to the outer circumference of the plunger 20 and is located outside the syringe 10.

When the nasal cavity administration device is used for administering medicine to a nasal cavity, medicine liquid is contained in a medicine liquid cavity 13 between the top end of the push rod 20 and the administration device 30 in the injector 10. The administration unit is used for one-time administration, the push rod 20 is rotated, the stop part 21 at the periphery of the push rod 20 is positioned under the one-time limit boss 11 at the bottom end of the injector 10, the push rod 20 is pushed, the push rod 20 moves upwards in the injector 10, the volume of the liquid medicine cavity 13 is reduced, and liquid medicine is sprayed out through the administration device 30; when the stop part 21 at the periphery of the push rod 20 abuts against the primary limit boss 11 at the bottom end of the injector 10, the push rod 20 cannot move upwards continuously, and one-time quantitative administration is completed. Then, the administration unit carries out secondary administration, the push rod 20 is rotated, the stop part 21 at the periphery of the push rod 20 is positioned under the secondary limiting boss 12 at the bottom end of the injector 10, the push rod 20 is continuously pushed upwards, the push rod 20 continuously moves upwards in the injector 10, the volume of the liquid medicine cavity 13 is further reduced, and liquid medicine is sprayed out through the administration device 30; when the stop part 21 on the periphery of the push rod 20 abuts against the secondary limit boss 12 at the bottom end of the injector 10, the push rod 20 cannot move upwards continuously, and secondary quantitative administration is completed. Therefore, the quantitative administration during the secondary administration can be accurately realized by the abutting fit of the rotary push rod 20, the stop part 21 on the push rod 20 and the last primary limiting boss 11 on the injector 10 and the abutting fit of the stop part 21 on the push rod 20 and the second limiting boss 12 on the injector 10, the quantitative administration of each of the left nasal cavity and the right nasal cavity can be realized once, and the precision of the quantitative administration is high; in addition, the operation only needs to rotate the push rod 20 and push the push rod 20, and the operation is quick. In addition, this application need not additionally to install spacing proportioning device when realizing twice dosing, can simplify the device of nasal cavity device of dosing.

Preferably, the outer periphery of the push rod 20 is provided with a through groove extending axially at the stop part 21, or a circle of the push rod 20 at the stop part 21, the stop part 21 is a sector of 1/4-1/2, and the remaining space of the circle except the stop part 21 forms the through groove, and the through groove allows the primary limit boss 11 on the syringe 10 to pass through, so that the part of the push rod 20 at the stop part 21 can pass over the primary limit boss 11 at the bottom end of the syringe 10 during the secondary administration of the administration unit, or the stop part 21 on the push rod 20 can avoid the primary limit boss 11 at the bottom end of the syringe 10 during the secondary administration.

Further, as shown in fig. 1, the nasal cavity administration device further comprises a drug suction unit, the drug suction unit comprises a needle tube 40, the injector 10, the push rod 20 and a needle tube protective cover 50, the needle tube 40 in the drug suction unit and the administration device 30 in the administration unit can be detachably mounted at the top end of the injector 10, the injector 10 and the push rod 20 are shared by the drug suction unit and the administration unit, and the needle tube protective cover 50 in the drug suction unit can be sleeved on the periphery of the needle tube 40 in an inserting and pulling manner. Preferably, as shown in fig. 2 and 7, the administration device 30 of the present embodiment includes an atomizer housing 60, and an atomizer 70 mounted on the atomizer housing 60 away from the tip of the syringe 10, wherein the atomizer housing 60 is detachably mounted on the tip of the syringe 10, and administration is performed after the liquid medicine is atomized by the atomizer 70.

Further, the removable connection between the injector 10 and the syringe 40 and the removable connection between the injector 10 and the atomizer housing 60 are threaded connections. Specifically, as shown in fig. 3, the top end of the syringe 10 is provided with an external thread connection section 14, and an external thread is tapped on the outer peripheral surface of the external thread connection section 14; as shown in fig. 6, the needle tube 40 is provided with a first female connection section 41 and a first through hole 42 at the first female connection section 41, the inner circumferential surface of the first female connection section 41 is tapped with female threads, and the first through hole 42 penetrates downward through the bottom end of the needle tube 40; as shown in fig. 7, the atomizer housing 60 is provided with a second female connecting section 61, and a second through hole 62 located at the second female connecting section 61, the inner peripheral surface of the second female connecting section 61 is tapped with female threads, and the second through hole 62 penetrates downward through the bottom end of the atomizer housing 60. When the nasal administration device is assembled into a medication intake unit, as shown in fig. 1, the male connecting section 14 of the syringe 10 is inserted into the first through-hole 42 of the needle tube 40 and is threadedly coupled with the first female connecting section 41 of the needle tube 40, thereby achieving detachable connection between the syringe 10 and the needle tube 40. When the nasal administration device is assembled into an administration unit, as shown in fig. 2, the male threaded connection section 14 of the syringe 10 extends into the second through hole 62 of the nebulizer housing 60 and is threadedly connected with the second female threaded connection section 61 of the nebulizer housing 60, thereby achieving detachable connection between the syringe 10 and the nebulizer housing 60. The detachable connection interface on the top end of the injector 10 is designed into an external thread, the detachable connection interface in the needle tube 40 and the atomizer shell 60 is designed into an internal thread, and the internal thread is designed into a through hole structure, so that the manufacture of the mold structure for manufacturing the injector 10, the needle tube 40 and the atomizer shell 60 can be simplified, the product quality of the injector 10, the needle tube 40 and the atomizer shell 60 is easier to control, and the mass production of the injector 10, the needle tube 40 and the atomizer shell 60 is facilitated.

Further, as shown in fig. 2 and 3, and fig. 8, the administration unit in the nasal administration device further includes a partition handle 80, the partition handle 80 being installed inside the nebulizer housing 60 at the bottom end of the nebulizer 70; as shown in fig. 2, 3 and 5, the push rod 20 includes a first connection section 22, a second connection section 23 and a plurality of connection points 24, the first connection section 22 is located inside the syringe 10, an upper section of the second connection section 23 is located inside the syringe 10, a lower section of the second connection section 23 is located outside the syringe 10, and the stop portion 21 is fixed on the outer periphery of the second connection section 23. Specifically, the bottom end of the first connecting section 22 is provided with a connecting convex portion 221 extending downward, the top end of the second connecting section 23 is provided with a connecting groove 231 for accommodating the connecting convex portion 221, and the connecting convex portion 221 and the groove wall of the connecting groove 231 are fixedly connected through a plurality of breakpoint connecting portions 24; each of the breakpoint connecting portions 24 has an integrally formed structure with the outer circumferential surface of the connecting convex portion 221 and the groove wall of the connecting groove 231, that is: each breakpoint connection portion 24 is integrally formed between the connection convex portion 221 and the groove wall of the connection groove 231. After the unit of dosing is dosed twice, the top of the first linkage segment 22 of push rod 20 stretches into in the isolating handle 80, and with isolating handle 80 block, die the top card of push rod 20 in isolating handle 80 from this, if pull out push rod 20 downwards by force, then push rod 20 is at breakpoint connecting portion 24 department fracture, make first linkage segment 22 and second linkage segment 23 disconnection, avoid using the unit of dosing again after the secondary is dosed, prevent other people used repeatedly, stop cross infection's risk.

Preferably, as shown in fig. 7, the atomizer housing 60 is provided with a shank coupling section 63 at the upper side of the second female screw coupling section 61, the partition shank 80 is fitted in the shank coupling section 63 in a tight-fitting manner, and when the atomizer housing 60 is screwed onto the tip end of the syringe 10, the tip end face of the syringe 10 abuts against the bottom end face of the partition shank 80, so that the partition shank 80 also functions to limit the syringe 10 during screwing of the syringe 10 into the atomizer housing 60.

Further, as shown in fig. 2 and 3, fig. 5 and fig. 8, a plurality of inwardly protruding snaps 81 are fixedly disposed on an inner circumferential surface of the blocking handle 80, a through hole portion is formed on an inner circumferential surface of the plurality of snaps 81, a reverse-locking portion 222 is disposed at a top end of the first connecting section 22, and the reverse-locking portion 222 can pass through the through hole portion of the blocking handle 80 and be locked with the snaps 81, thereby achieving the purpose of locking a top portion of the push rod 20 in the blocking handle 80 after the second administration. Preferably, as shown in fig. 5, the top end of the first connection section 22 is a spherical portion 223, the spherical portion 223 is at most 1/2 spheres, and the inverted clamping portion 222 is disposed at the bottom end of the spherical portion 223, so that the outer diameter of the top end of the first connection section 22 is gradually increased from top to bottom, and the top end of the first connection section 22 is conveniently passed through the through hole portion of the blocking handle 80, so that the inverted clamping portion 222 of the push rod 20 is conveniently clamped with the catch 81 of the blocking handle 80.

Further, as shown in fig. 1 or fig. 2, a butyl rubber plug 90 is fixed on the outer peripheral surface of the first connecting section 22 close to the second connecting section 23, the butyl rubber plug 90 is in interference fit with the inner peripheral surface of the syringe 10, and the first connecting section 22 and the syringe 10 and the second connecting section 23 and the syringe 10 are in clearance fit, so that the push rod 20 can be easily pushed upwards or the push rod 20 can be easily pulled downwards, and meanwhile, the sealing performance between the push rod 20 and the syringe 10 is ensured by the butyl rubber plug 90.

Further, the plunger 20 having the above-described structure is an integrally molded part, and the syringe 10 having the above-described structure is an integrally molded part, so that the operation is simplified, and particularly, the dimensions of the plunger 20 and the syringe 10 can be made more precise, and the dosing accuracy of the dosing can be made higher.

The working principle of the nasal cavity drug delivery device with the structure is as follows:

the nasal cavity administration device is used for supplying liquid medicine to the left nasal cavity and the right nasal cavity for two times of administration; the liquid medicine is dry powder medicine dissolved in liquid medicine.

Taking the medicine: screwing the needle tube 40 to the top end of the injector 10, pulling the push rod 20 downwards, and sucking the liquid medicine into the liquid medicine cavity 13 of the injector 10 through the needle tube 40; inserting the needle tube 40 into a penicillin bottle filled with dry powder medicament, pushing the push-pull upwards, and injecting liquid medicament into the penicillin bottle; after the liquid medicament and the dry powder medicament are mixed, the push rod 20 is pulled downwards to suck the mixed liquid medicament in the penicillin bottle; after the medication is taken out, the needle tube 40 is removed from the tip of the syringe 10.

Administration: screwing the atomizer shell 60 provided with the atomizer 70 and the partition handle 80 at the top end of the injector 10, turning the push rod 20 to one side of the stop part 21 under the primary limiting boss 11, pushing the push rod 20 upwards until the stop part 21 is abutted against the primary limiting boss 11, and finishing the first quantitative administration; then, the push rod 20 is turned to one side of the stop part 21 which is positioned right below the secondary limit boss 12, the push rod 20 is pushed upwards until the stop part 21 is abutted against the secondary limit boss 12, and the second quantitative dosing is finished. After the second administration is finished, the reverse clamping part 222 at the top end of the push rod 20 is clamped at the upper end of the buckle 81 in the partition handle 80, so that the top of the push rod 20 is clamped, and the push rod 20 cannot be pulled down and taken out; at this time, if the push rod 20 is pulled down forcibly, since the first connection section 22 and the second connection section 23 of the push rod 20 are connected only by the plurality of breakpoint connection parts 24 distributed at intervals, the connection strength of the connection part of the first connection section 22 and the second connection section 23 is low, the push rod 20 is broken at the breakpoint connection part 24 under the pull-down action, and the push rod 20 is self-destructed into two broken sections, thereby realizing the anti-theft.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. A nasal delivery device comprising a delivery unit comprising a syringe (10), a pushrod (20) movably and rotatably mounted in the syringe (10), and a dispenser (30) mounted at the tip of the syringe (10), characterized in that: the bottom end of the injector (10) is fixedly provided with a primary limiting boss (11) and a secondary limiting boss (12) which extend towards the direction far away from the medicine feeder (30), the bottom end of the secondary limiting boss (12) is higher than that of the primary limiting boss (11), the primary limiting boss (11) and the secondary limiting boss (12) are distributed in a staggered manner in the circumferential direction of the injector (10), and the periphery of the push rod (20) is provided with a stop part (21) positioned outside the injector (10); when the administration unit is used for one-time administration, the stop part (21) can be abutted and matched with the one-time limit boss (11); when the administration unit is used for secondary administration, the stop part (21) can be in butt fit with the secondary limit boss (12).

2. The nasal delivery device of claim 1, wherein: the periphery of the push rod (20) is provided with an axially extending through groove at the stop part (21), and the through groove allows a primary limiting boss (11) on the injector (10) to pass through.

3. The nasal delivery device of claim 1, wherein: still include the unit of inhaling medicine, inhale medicine unit include needle tubing (40), syringe (10) and push rod (20), needle tubing (40) and ware of dosing (30) all can be dismantled with syringe (10) and be connected.

4. A nasal delivery device according to claim 3, wherein: the top end of the injector (10) is provided with an external thread connecting section (14), the needle tube (40) is provided with a first internal thread connecting section (41) and a first through hole (42) positioned at the first internal thread connecting section (41), the medicine feeder (30) comprises an atomizer shell (60) and an atomizer (70) which is arranged on the atomizer shell (60) and is far away from the top end of the injector (10), and the atomizer shell (60) is provided with a second internal thread connecting section (61) and a second through hole (62) positioned at the second internal thread connecting section (61);

when the nasal cavity administration device is assembled into the medicine suction unit, the external thread connecting section (14) of the injector (10) extends into the first through hole (42) of the needle tube (40) and is in threaded connection with the first internal thread connecting section (41) of the needle tube (40); when the nasal administration device is assembled into the administration unit, the externally threaded connecting section (14) of the syringe (10) extends into the second through hole (62) of the nebulizer housing (60) and is threadedly connected with the second internally threaded connecting section (61) of the nebulizer housing (60).

5. The nasal delivery device of claim 1, wherein: the medicine dispenser is characterized by further comprising a separation handle (80), the medicine dispenser (30) comprises an atomizer shell (60) and an atomizer (70) which is installed on the atomizer shell (60) and far away from the top end of the injector (10), the separation handle (80) is installed in the atomizer shell (60) and located at the bottom end of the atomizer (70), the push rod (20) comprises a first connecting section (22), a second connecting section (23) and a plurality of breakpoint connecting parts (24), a connecting convex part (221) is arranged at the bottom end of the first connecting section (22), a connecting groove (231) for accommodating the connecting convex part (221) is arranged at the top end of the second connecting section (23), and the connecting convex part (221) is fixedly connected with the groove wall of the connecting groove (231) through the plurality of breakpoint connecting parts (24); after the administration unit finishes the second administration, the top end of the first connecting section (22) extends into the blocking handle (80) and is clamped with the blocking handle (80).

6. The nasal delivery device of claim 5, wherein: the inner circumferential surface of the partition handle (80) is fixedly provided with a plurality of buckles (81) protruding inwards, the inner circumference of the plurality of buckles (81) is provided with a through hole part, the top end of the first connecting section (22) is provided with a reverse clamping part (222), and the reverse clamping part (222) can penetrate through the through hole part of the partition handle (80) and is clamped with the buckles (81).

7. The nasal delivery device of claim 6, wherein: the top end of the first connecting section (22) is a sphere part (223), the sphere part (223) is 1/2 spheres at most, and the reverse clamping part (222) is arranged at the bottom end of the sphere part (223).

8. The nasal delivery device of claim 5, wherein: the outer peripheral surface of the first connecting section (22) close to the second connecting section (23) is fixed with a butyl rubber plug (90), and the butyl rubber plug (90) is in interference fit with the inner peripheral surface of the injector (10).

9. The nasal delivery device of claim 5, wherein: the push rod (20) is an integrally formed part.

10. The nasal delivery device of claim 1, wherein: the injector (10) is an integrally formed part.

Images