A drug delivery device

Abstract

The utility model relates to a kind of dosing devices, it includes: injection tube, the injection tube includes tube body, lug formed in the one end of the tube body and liquid outlet head formed in the other end of the tube body, the liquid outlet head has with the liquid outlet hole of the tube body intercommunication, the diameter of the liquid outlet hole gradually decreases from inside to outside;Injection rod, the injection rod includes rod body and the piston of installation in the rod body end portion and with the tube body cooperation;Cover, the cover is detachably installed on the liquid outlet head.By using the injection tube, injection rod and cover of specific structure cooperate, greatly simplify the structure of dosing device;And liquid outlet head can increase the liquid outlet pressure of liquid medicine, to cooperate and realize smooth dosing.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology and relates to a drug delivery device, specifically a drug delivery device for women's private parts. Background Technology

[0002] Gynecological diseases refer to diseases of the female reproductive system, including vulvar diseases, vaginal diseases, uterine diseases, fallopian tube diseases, and ovarian diseases. When treating gynecological diseases and needing to administer medication to the affected area, a specialized medication delivery device is required.

[0003] Chinese utility model patent application number 202321523320.6 discloses a drug delivery device in the field of gynecology, including a drug delivery device body, a clamping mechanism, and a filtering mechanism. An injection rod is installed on one end of the inner wall of the drug delivery device body. This utility model, through its filtering mechanism, facilitates the dispensing of medication from ampoules via the drug delivery device body. When opening the ampoule, glass shards inevitably fall into the ampoule's liquid. The filter tube is connected to the injection tube on the outer wall of the drug delivery device body via a fixing tube. When administering medication to the patient's affected area, pressing the injection rod injects the medication from inside the drug delivery device body into the affected area. When the medication enters the filter tube, the filter screen inside the filter tube filters out any glass shards from the ampoule, preventing them from being injected into the body. Furthermore, the flexible tube and the dispensing head allow for administration to the patient's private parts, thus improving the practicality of the drug delivery device. However, such a drug delivery device has a complex structure. Utility Model Content

[0004] The purpose of this invention is to provide a drug delivery device to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a drug delivery device, comprising:

[0006] An injection tube, comprising a tube body, a lug formed at one end of the tube body, and a liquid outlet formed at the other end of the tube body, wherein the liquid outlet has a liquid outlet hole communicating with the tube body, and the diameter of the liquid outlet hole gradually decreases from the inside to the outside.

[0007] An injection rod, the injection rod comprising a rod body and a piston mounted on the end of the rod body and cooperating with the tube body;

[0008] A cover body, which is detachably mounted on the liquid outlet head.

[0009] Ideally, a raised ring is formed on the outer peripheral surface of the liquid outlet head, and the liquid outlet head and the tube body are smoothly connected.

[0010] Ideally, the injection tube is made of polystyrene.

[0011] Optimally, the rod body includes a push plate, a pressing head disposed on one side of the push plate, a connecting rod formed between the push plate and the pressing head, a transition rod formed on the end face of the push plate, a limiting protrusion formed on the outer circumferential surface of the transition rod, and a connector formed at the free end of the transition rod.

[0012] Furthermore, the piston includes a piston body, multiple sealing protrusions formed on the outer peripheral surface of the piston body, and a connecting hole formed in the piston body and cooperating with the adapter rod, the connector and the limiting protrusion.

[0013] Ideally, the cover includes at least a plug that mates with the liquid outlet head. The plug includes a sleeve body, a plug cap formed at the end of the sleeve body, and a connecting recess formed on the outer surface of the connection between the sleeve body and the plug cap. The sleeve body has a cavity that mates with the liquid outlet head.

[0014] Optimally, the cover also includes an upper cover and a lower cover that cooperate with the plug.

[0015] The upper cover includes a first sleeve fitted over the end cap, a second sleeve formed at the end of the first sleeve and fitted over the main body of the sleeve, a snap-fit ​​protrusion formed on the outer peripheral surface of the second sleeve, and a limiting protrusion that cooperates with the connecting concave ring and is formed on the inner wall of the first sleeve and the second sleeve.

[0016] Furthermore, the lower cover includes a third sleeve fitted over the second sleeve and a limiting ring formed on the outer end face of the third sleeve and extending inward. The inner wall of the third sleeve has a locking groove that mates with the locking protrusion and a guide protrusion that mates with the locking groove.

[0017] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: the drug delivery device of this utility model greatly simplifies the structure of the drug delivery device by using a specific structure of injection tube, injection rod and cap; moreover, the liquid outlet head can increase the liquid outlet pressure to facilitate smooth drug delivery. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the drug delivery device of this utility model;

[0019] Figure 2 for Figure 1 AA section view;

[0020] Figure 3 This is a schematic diagram showing another state of the drug delivery device of this utility model;

[0021] Figure 4 This is a schematic diagram of the injection tube in the drug delivery device of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the injection rod in the drug delivery device of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the injection rod piston in the drug delivery device of this utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the cap plug in the drug delivery device of this utility model;

[0025] Figure 8 This is a schematic diagram of the upper cover of the drug delivery device of this utility model;

[0026] Figure 9 This is a schematic diagram of the lower cover of the drug delivery device of this utility model. Detailed Implementation

[0027] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0028] like Figures 1 to 3 The drug delivery device shown mainly includes a matching injection rod 1, injection tube 2, and cap 3.

[0029] Among them, such as Figure 4 As shown, the injection tube 2 includes a tube body 21, a lug 22 formed at one end of the tube body 21 (usually formed integrally, the same below; the lug 22 here facilitates the user's grip on the device), and a dispensing head 23 formed at the other end of the tube body 21. The dispensing head 23 has a dispensing hole 232 communicating with the tube body 21, and the diameter of the dispensing hole 232 gradually decreases from the inside to the outside (i.e., Figure 4 (From left to right). In this embodiment, a raised ring 231 is formed on the outer peripheral surface of the dispensing head 23 to facilitate the installation of the plug 31; the dispensing head 23 and the tube body 21 are smoothly connected, so that their connection point has a first concave arc surface 211 and a first convex arc surface 212 connected on the inner wall. The material of the injection tube 2 is preferably polystyrene, which is safe and reliable. By using a specific structure for the injection tube 2, injection rod 1 and cap 3, the structure of the drug delivery device is greatly simplified; moreover, the dispensing head 23 can increase the dispensing pressure of the drug solution to facilitate smooth drug delivery.

[0030] like Figure 5 and Figure 6The injection rod 1 includes a rod body 11 and a piston 12 mounted on the end of the rod body 11 and cooperating with the tube body 21. The size of the rod body 11 is usually smaller than the inner diameter of the tube body 21, while the diameter of the piston 12 is usually slightly larger than the inner diameter of the tube body 21 to ensure the sealing between the piston 12 and the tube body 21 and avoid leakage. In this embodiment, the rod 11 is preferably made of polystyrene and includes a push plate 111, a pressing head 112 disposed on one side of the push plate 111, a connecting rod 113 formed between the push plate 111 and the pressing head 112 (the specific shape of the connecting rod 113 is not limited, as long as it can achieve the connection between the push plate 111 and the pressing head 112; for example, it can be rod-shaped, or it can be a structure formed by the intersection of two plates), a transition rod 114 formed on the end face of the push plate 111 (the length and diameter of the transition rod 114 are much smaller than those of the connecting rod 113), a limiting protrusion ring 116 formed on the outer peripheral surface of the transition rod 114, and a connector 115 formed on the free end of the transition rod 114. The piston 12 includes a piston body 121, multiple sealing rings 122 formed on the outer circumferential surface of the piston body 121, and a connecting hole 123 opened in the piston body 121 and cooperating with the adapter rod 114, the connector 115 and the limiting ring 116, so that the piston 12 can be tightly installed at the end of the rod 11.

[0031] The cover 3 is detachably mounted on the liquid outlet 23. For example... Figures 7 to 9 As shown, the cover 3 includes at least a plug 31 that mates with the liquid outlet head 23. The plug 31 includes a sleeve body 312, a plug cap 311 formed at the end of the sleeve body 312, and a connecting recess 313 formed on the outer surface of the connection between the sleeve body 312 and the plug cap 311. The sleeve body 312 has a cavity 3121 that mates with the liquid outlet head 23 so that the plug 31 can be installed on the liquid outlet head 23, so that the end face of the liquid outlet head 23 abuts against the inner wall of the plug 31 to prevent leakage.

[0032] In this embodiment, the cover 3 further includes an upper cover 32 and a lower cover 33 that cooperate with the plug 31. The upper cover 32 includes a first sleeve 321 that is fitted over the plug cap 311, a second sleeve 322 formed at the end of the first sleeve 321 and fitted over the sleeve body 312 (the diameter of the first sleeve 321 is slightly larger than the diameter of the second sleeve 322), a snap-fit ​​protrusion 323 formed on the outer circumferential surface of the second sleeve 322, and a limiting protrusion 324 that cooperates with the connecting concave ring 313 and is formed on the inner wall of the first sleeve 321 and the second sleeve 322, thereby fitting the upper cover 32 onto the plug 31. The lower cover 33 includes a third cover 331 that is fitted over the second cover 322 and a limiting ring 332 that is formed on the outer end face of the third cover 331 and extends inward. The inner wall of the third cover 331 has a locking groove 3312 that cooperates with the locking protrusion 323 and a guide protrusion 3311 that cooperates with the locking groove 3312, so that the lower cover 33 can be fitted onto the upper cover 32.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A drug delivery device, characterized in that it include: The injection tube (2) includes a tube body (21), a lug (22) formed at one end of the tube body (21), and a liquid outlet (23) formed at the other end of the tube body (21). The liquid outlet (23) has a liquid outlet hole (232) communicating with the tube body (21). The diameter of the liquid outlet hole (232) gradually decreases from the inside to the outside. Injection rod (1), the injection rod (1) includes a rod body (11) and a piston (12) mounted on the end of the rod body (11) and cooperating with the tube body (21). The cover (3) is detachably mounted on the liquid outlet (23).

2. The drug delivery device according to claim 1, characterized in that: A raised ring (231) is formed on the outer peripheral surface of the liquid outlet head (23), and the liquid outlet head (23) and the tube body (21) are smoothly connected.

3. The drug delivery device according to claim 1, characterized in that: The injection tube (2) is made of polystyrene.

4. The drug delivery device according to claim 1, characterized in that: The rod body (11) includes a push plate (111), a pressing head (112) disposed on one side of the push plate (111), a connecting rod (113) formed between the push plate (111) and the pressing head (112), a transition rod (114) formed on the end face of the push plate (111), a limiting protrusion (116) formed on the outer peripheral surface of the transition rod (114), and a connector (115) formed at the free end of the transition rod (114).

5. The drug delivery device according to claim 4, characterized in that: The piston (12) includes a piston body (121), multiple sealing rings (122) formed on the outer circumferential surface of the piston body (121), and a connecting hole (123) opened in the piston body (121) and cooperating with the adapter rod (114), the connector (115) and the limiting ring (116).

6. The drug delivery device according to claim 1, characterized in that: The cover (3) includes at least a plug (31) that mates with the liquid outlet head (23). The plug (31) includes a sleeve body (312), a plug cap (311) formed at the end of the sleeve body (312), and a connecting recess (313) formed on the outer surface of the connection between the sleeve body (312) and the plug cap (311). The sleeve body (312) has a cavity (3121) that mates with the liquid outlet head (23).

7. The drug delivery device according to claim 6, characterized in that: The cover (3) further includes an upper cover (32) and a lower cover (33) that cooperate with the plug (31). The upper cover (32) includes a first sleeve (321) sleeved outside the plug cap (311), a second sleeve (322) formed at the end of the first sleeve (321) and sleeved outside the sleeve body (312), a snap-fit ​​protrusion (323) formed on the outer peripheral surface of the second sleeve (322), and a limiting protrusion (324) that cooperates with the connecting concave ring (313) and is formed on the inner wall of the first sleeve (321) and the second sleeve (322).

8. The drug delivery device according to claim 7, characterized in that: The lower cover (33) includes a third sleeve (331) sleeved outside the second sleeve (322) and a limiting ring (332) formed on the outer end face of the third sleeve (331) and extending inward. The inner wall of the third sleeve (331) has a locking groove (3312) that cooperates with the locking protrusion (323) and a guide protrusion (3311) that cooperates with the locking groove (3312).

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