CN211095125U - Preloaded Pen ICI Injection Device - Google Patents

Abstract

The device comprises a needle cylinder and a push rod, wherein the inner cavity of the needle cylinder is in a step shape and comprises a piston cavity and a push rod cavity which are coaxial, a cylindrical medicine outlet is arranged on the wall of the end part of the piston cavity, and a sealing film is arranged on one side of the medicine outlet close to the piston cavity for sealing; a push rod is arranged in the push rod cavity, a piston and a push disc are respectively fixed at two ends of the push rod, the piston is in gapless sliding fit connection with the inner wall of the piston cavity, the push rod is in sliding fit connection with the inner wall of the push rod cavity, a tension spring surrounding the outer wall of the push rod is arranged between the push disc and the tail end face of the needle cylinder, two ends of the tension spring are respectively fixed on the inner end face of the push disc and the tail end face of the needle cylinder, a limiting ring is arranged on the periphery of the tension spring, and an; the tail end of the push disc is provided with a groove, and the bottom of the groove is provided with a hole; the piston is positioned at the tail part of the piston cavity and internally filled with ICI liquid medicine. The utility model can solve the technical problems of complex operation of the current ICI drug injection, complex structure of the existing pen-type injector and high cost.

Description

Preloaded Pen ICI Injection Device

technical field

The utility model belongs to the field of medical aids, in particular to a pre-installed pen-type ICI injection device.

Background technique

Penile erection induced by intracavernous injection of vasoactive drugs (ICI) can be used to treat erectile difficulties in men. Vasoactive drugs are prostaglandin E1 and so on. ICI advantages: easy to operate, less subject to external interference, good repeatability of results, and rapid results.

The operation method of injecting ICI: the patient lies supine, the root of the penis is cerclaged with a rubber band, and the operation is performed under strict aseptic principles after disinfection. The injection site is generally on both sides of the middle and posterior part of the penis, and the neurovascular bundle and urethra should be avoided. After fixing the skin of the injection site with your fingers, the needle penetrates vertically into the corpus cavernosum of the penis. When the tunica albuginea is pierced, there will be a sense of breakthrough. There is no need to withdraw blood. Immediately inject the drug slowly into the corpus cavernosum. After the injection, pull out the needle and use a cotton swab to compress the injection site 2 Minutes to prevent bleeding and hematoma, loosen the rubber band after 3 minutes, stimulate the penis with your hands to promote erection.

For patients, the initial injection generally needs to be completed under the guidance of a doctor in the hospital. The rest of the operation is done by the patient himself. Due to the particularity of the application of this drug, patients are required to inject themselves before having sex. It can be seen from the above operation method that during use, one hand needs to fix the penis, so the injection can only be done with the other hand, and how to use one-handed injection to make the injection more convenient has become an urgent problem to be solved.

Insulin pens are complicated in structure and high in price. At present, they mainly rely on imports, such as the insulin pens developed by the Austrian Institute of Science and Technology. The domestic utility model patent with the patent number "CN105148357A" provides an anti-caking insulin pen. However, the pen uses multiple sensors, single-chip microcomputers and other components, and still has the problems of high cost and complex structure. The ICI drug itself is expensive, and the use of expensive insulin pens will increase the burden on patients; and the needles of some insulin pens are not disposable, and if they are used to inject into the penis, there are serious health and safety issues.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a pre-installed pen-type ICI injection device, which solves the technical problems of complicated ICI drug injection operation, complicated structure and high cost of the existing pen-type injector.

The technical scheme of the present utility model is:

Preloaded pen-type ICI injection device, including syringe and plunger,

The inner cavity of the syringe is stepped, including a coaxial piston cavity and a push rod cavity, the inner diameter of the piston cavity is larger than the inner diameter of the push rod cavity, and a cylindrical medicine outlet is arranged on the end wall of the piston cavity, and the medicine outlet A sealing film seal is set on the side of the piston cavity;

A push rod is arranged in the push rod cavity, the two ends of the push rod are respectively fixed with a piston and a push plate, the piston is connected with the inner wall of the piston cavity without clearance, and the push rod is connected with the inner wall of the push rod cavity in a sliding fit. A tension spring surrounding the outer wall of the push rod is arranged between the push plate and the end face of the rear end of the needle cylinder, the two ends of the tension spring are respectively fixed on the inner end face of the push plate and the end face of the tail end of the needle cylinder, and a limit ring is arranged on the periphery of the tension spring, so The two ends of the limit ring are respectively clamped on the inner end face of the push plate and the end face of the tail end of the needle cylinder, the limit ring is provided with an opening along the thickness direction; the end of the push plate is provided with a groove, and the bottom of the groove is provided with a needle head The piston extends to the hole in the push rod; the piston is located at the end of the piston chamber and the piston chamber is pre-filled with ICI liquid medicine.

Preferably, the root of the needle head is a cylindrical needle holder, and the outer wall of the needle holder is tightly fitted or screwed to the groove.

Preferably, the outer wall of the needle holder is tightly fitted or screwed to the inner wall of the drug outlet.

Preferably, the height of the needle holder is greater than the depth of the groove and less than the length of the drug outlet.

Preferably, the push plate is hemispherical, and includes a curved outer wall and a plane wall vertically connected to the push rod.

Preferably, the push plate is made of rubber.

The operation method of the preloaded pen-type ICI injection device includes the following steps:

1) Install the needle: remove the needle holder and the needle from the groove, pierce the sealing film with the needle, turn the needle so that the needle faces outward, and install the needle holder in the drug outlet and the The end face of the needle holder does not protrude from the end face of the needle cylinder;

2) Injection: fix the penis with one hand, and pierce the needle into the appropriate position of the corpus cavernosum with the other hand; remove the limit ring after piercing, and the tension spring pulls the push plate, drives the push rod and the piston to realize automatic injection;

3) Narrowing the needle: after the injection is completed, the needle is removed, the needle holder is placed in the groove, and the needle is located in the hole.

The advantages and positive effects that the utility model has are:

(1) It can be injected with one hand, and the liquid medicine is pre-installed, the operation steps are simple, and it is suitable for patients to operate alone;

(2) The height of the needle holder is greater than the groove to facilitate the needle extraction from the groove, and the height of the needle holder is smaller than the length of the drug outlet to ensure that the needle holder is buried in the syringe. skin.

(3) When injecting with one hand, the curved surface of the push plate touches the palm of the hand, the material is more comfortable, and it is not easy to hurt the hand.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the state schematic diagram of the installation needle in the operating method of the present utility model;

Fig. 3 is the state schematic diagram of removing the lower limit ring in the operating method of the present utility model;

Fig. 4 is the structural representation of the limit ring of the present invention;

Fig. 5 is the cross-sectional schematic diagram of Fig. 1;

Fig. 6 is the cross-sectional schematic diagram of Fig. 2;

Fig. 7 is the cross-sectional schematic diagram of Fig. 3;

Figure 8 is a schematic diagram of the internal structure of the injection into half;

Fig. 9 is the internal structure schematic diagram after injection;

Figure 10 is a schematic diagram of the internal structure when the needle is narrowed.

Drawing number: 1-syringe, 11-piston cavity, 12-push rod cavity, 13-drug outlet, 14-sealing film, 2-push rod, 21-piston, 22-push plate, 23-groove, 24 -Hole, 3-tension spring, 4-limiting ring, 41-opening, 5-pin head, 51-pin holder.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings.

Referring to Figure 1-10, a pre-installed pen-type ICI injection device, including a syringe 1 and a push rod 2,

Referring to FIG. 4 , the inner cavity of the syringe 1 is stepped, including a coaxial piston cavity 11 and a push rod cavity 12 , the inner diameter of the piston cavity 11 is larger than the inner diameter of the push rod cavity 12 , and the end wall of the piston cavity 11 is A cylindrical medicine outlet 13 is provided, and the medicine outlet 13 is sealed with a sealing film 14 on one side of the piston cavity 11;

A push rod 2 is arranged in the push rod cavity 12 , and a piston 21 and a push plate 22 are fixed at both ends of the push rod 2 respectively. The inner wall of the cavity 12 is slidably connected, and a tension spring 3 surrounding the outer wall of the push rod 2 is arranged between the push plate 22 and the end face of the end of the needle cylinder 1. The two ends of the tension spring 3 are respectively fixed on the inner end face of the push plate 22 and the needle cylinder. 1. On the end face of the tail, a limit ring 4 is arranged on the periphery of the tension spring 3. The two ends of the limit ring 4 are respectively clamped on the inner end face of the push plate 22 and the end face of the tail of the needle cylinder 1. The limit ring 4 is arranged along the thickness direction. An opening 41; a groove 23 is provided at the rear end of the push plate 22, and a hole 24 extending into the push rod 2 for accommodating the needle 5 is provided at the bottom of the groove 23; the piston 21 is located at the end of the piston cavity 11 and the The piston cavity 11 is pre-filled with ICI liquid medicine. The tension spring can ensure that the push plate is pulled after the limit ring is removed, so that the drug can be slowly and automatically pushed into the penis.

Further, the root of the needle head 5 is a cylindrical needle holder 51 , and the outer wall of the needle holder 51 is tightly fitted or screwed to the groove 23 .

Further, referring to FIG. 5 , the outer wall of the needle holder 51 is tightly fitted or screwed to the inner wall of the drug outlet 13 .

Further, the height of the needle holder 51 is greater than the depth of the groove 23 and less than the length of the drug outlet 13 . The height of the needle holder 51 is greater than that of the groove 23 to facilitate the needle extraction from the groove 23, and the length of the needle holder 51 is smaller than the length of the drug outlet 13 to ensure that the needle holder 52 is buried in the syringe. Fits the skin.

Further, the push plate 22 is hemispherical, and includes a curved outer wall and a plane wall vertically connected to the push rod 2 .

Further, the push plate 22 is made of rubber. When injecting with one hand, the curved surface of the push plate 22 touches the palm of the hand, and the material is more comfortable and not easy to hurt the hand.

The operation method of the preloaded pen-type ICI injection device includes the following steps:

1) Install the needle head 5: remove the needle head 51 and the needle head 5 from the groove 23, pierce the sealing film 14 with the needle head 5, turn the needle head 5 so that the needle head 5 faces outwards and set the needle head 5 51 is installed in the medicine outlet 13 and the end face of the needle holder 51 does not protrude from the end face of the syringe 1;

2) Injection: fix the penis with one hand, and pierce the needle 5 into the appropriate position of the corpus cavernosum with the other hand; remove the limit ring 4 after piercing, the tension spring 3 pulls the push plate 22, and drives the push rod 2 and the piston 21 to realize automatic injection;

3) Narrowing the needle: after the injection is completed, the needle 5 is removed, the needle holder 51 is placed in the groove 23 and the needle 5 is located in the hole 24 .

An embodiment of the present invention has been described in detail above, but the content is only a preferred embodiment of the present invention, and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present utility model should still belong to the scope of the patent of the present utility model.

Claims (6)

1. A pre-filled pen-type ICI injection device comprising a barrel (1) and a ram (2) characterized in that,

the inner cavity of the needle cylinder (1) is stepped and comprises a piston cavity (11) and a push rod cavity (12) which are coaxial, the inner diameter of the piston cavity (11) is larger than that of the push rod cavity (12), a cylindrical medicine outlet (13) is formed in the end wall of the piston cavity (11), and a sealing film (14) is arranged on one side, close to the piston cavity (11), of the medicine outlet (13) for sealing;

a push rod (2) is arranged in the push rod cavity (12), a piston (21) and a push disc (22) are respectively fixed at two ends of the push rod (2), the piston (21) is in gapless sliding fit connection with the inner wall of the piston cavity (11), the push rod (2) is in sliding fit connection with the inner wall of the push rod cavity (12), a tension spring (3) surrounding the outer wall of the push rod (2) is arranged between the push disc (22) and the tail end face of the needle cylinder (1), two ends of the tension spring (3) are respectively fixed on the inner end face of the push disc (22) and the tail end face of the needle cylinder (1), a limiting ring (4) is arranged on the periphery of the tension spring (3), two ends of the limiting ring (4) are respectively clamped on the inner end face of the push disc (22) and the tail end face of the needle cylinder (1), and an opening (41) is formed in the limiting; a groove (23) is formed in the tail end of the push disc (22), and a hole (24) which is used for accommodating the needle head (5) and extends into the push rod (2) is formed in the bottom of the groove (23); the piston (21) is positioned at the tail part of the piston cavity (11) and ICI liquid medicine is pre-filled in the piston cavity (11).

2. A pre-filled pen ICI injection device according to claim 1 where the needle (5) is bottomed with a cylindrical needle holder (51) and where the outer wall of the needle holder (51) is a tight fit or threaded connection with the recess (23).

3. A pre-filled pen ICI injection device according to claim 2 where the outer wall of the needle holder (51) is a tight fit or a threaded connection with the inner wall of the drug outlet (13).

4. A pre-filled pen ICI injection device according to claim 2 wherein the needle holder (51) has a height greater than the depth of the recess (23) and less than the length of the drug outlet (13).

5. The pre-filled pen ICI injection device according to claim 1 wherein the push disc (22) is hemispherical and comprises a curved outer wall and a planar wall perpendicularly connected to the push rod (2).

6. The pre-filled pen-type ICI injection device according to claim 1, wherein the push disc (22) is of rubber material.

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