CN111603666A - A gynecological drug delivery device - Google Patents

Abstract

The technical scheme of the present invention is a gynecological drug delivery device, which includes a casing body for storing medicine, a push rod located in the casing body, and a rubber plug arranged on the top of the push rod and closely fitting with the inner wall of the casing body. The casing main body includes an upper rubber plug running section and a lower push rod ejection section, the inner diameter of the push rod ejection section is larger than the inner diameter of the rubber plug running section, the front end of the casing main body is provided with a medicine outlet, the The outer side of the medicine outlet is threadedly connected with a sheath, the sheath and the front end of the casing main body are taper-fitted to achieve sealing, the rear end of the casing main body is threadedly connected with a back cover, and the rear cover is in contact with the rear end of the casing main body The inner diameter of the ejection section of the push rod is larger than the outer diameter of the front end of the sheath, and the front end of the sheath can be inserted from the tail of the inner side wall of the ejection section of the push rod and held at the tail of the push rod to push the medicine forward. The invention has the advantages of simple structure, good sealing performance and convenient administration.

Description

A gynecological drug delivery device

technical field

The invention relates to a medical instrument, in particular to a gynecological drug delivery device.

Background technique

In gynecological clinical practice, vaginal medication is the most common and effective method for treating vaginal inflammation, which is to directly deliver externally-applied drugs to the lesion by means of a drug delivery device to achieve the purpose of treatment. At present, the drug delivery device for gynecological external medicine of liquid, gel and paste type is generally composed of a casing body, a piston and a push rod. As shown in Figure 1, the drug delivery device of this structure is used in clinical practice. Because the medicine is usually stored in the casing body, the sealing at the front and rear ends is not good and it is easy to leak out, and the medicine cannot be stored for a long time. External vacuum, when the vacuum pressure exceeds 40KPa, the detection liquid will leak. As a pharmaceutical packaging material, slow leakage and poor sealing will affect the precise control of the net weight of the liquid medicine or ointment. If the medicines are potted in large quantities, if the gram weight control accuracy is accurate, the waste and loss will be huge.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention aims to provide a gynecological drug delivery device, which has good sealing performance, convenient drug delivery process and simple operation.

The technical scheme of the present invention is a gynecological drug delivery device, which includes a casing body for storing medicine, a push rod located in the casing body, and a rubber plug which is arranged on the top of the push rod and closely fits with the inner wall of the casing body, so that the The casing main body includes an upper rubber plug running section and a lower push rod ejection section, the inner diameter of the push rod ejection section is larger than the inner diameter of the rubber plug running section, the front end of the casing main body is provided with a medicine outlet, the The outer side of the medicine outlet is threadedly connected with a sheath, the sheath and the front end of the casing main body are taper-fitted to achieve sealing, the rear end of the casing main body is threadedly connected with a back cover, and the rear cover is in contact with the rear end of the casing main body The inner diameter of the ejection section of the push rod is larger than the outer diameter of the front end of the sheath, and the front end of the sheath can be inserted from the tail of the inner side wall of the ejection section of the push rod and held at the tail of the push rod to push the medicine forward.

Preferably, an inner threaded hole is processed on the front end face of the main body of the sleeve, the inner threaded hole is located outside the medicine outlet and is arranged concentrically with the medicine outlet, and the inner side wall of the inner threaded hole is inclined inward from bottom to top Keeping the taper, the inner side of the top of the sheath is provided with a downwardly extending sealing sleeve, the outer surface of the sealing sleeve is provided with an external thread, and the sheath is threadedly connected to the inner part of the sleeve body through the sealing sleeve thereon. In the threaded hole, after the sheath is threadedly connected to the casing main body, the inner surface of the sealing casing closely fits on the conical surface of the inner threaded hole to form a seal.

Preferably, the lower part of the sealing sleeve is provided with a notch extending through the side wall of the sealing sleeve for easy demolding.

Preferably, the top of the tapered surface of the inner side wall of the inner threaded hole is provided with a chamfer.

Preferably, the front end surface of the wall of the medicine outlet is higher than the front end surface of the casing body outside the inner threaded hole.

Preferably, the outer side wall at the front end of the sleeve body is gradually inclined inward from bottom to top and smoothly transitions with the front end surface.

Preferably, an annular step is provided on the inner bottom surface of the rear cover, the inner side wall of the tail end of the casing body is gradually inclined outward from top to bottom, and the outer side wall of the tail end of the casing body is provided with external threads, and the rear end of the casing body is provided with an external thread. The inner side wall of the cover is provided with internal threads that cooperate with each other, and when the rear cover is threadedly connected to the casing main body, the annular step closely fits on the inner side wall of the tail end of the casing main body to form a seal.

Preferably, the outer side wall of the lower end of the sheath is provided with a non-slip portion.

Preferably, the outer side wall of the rear cover is provided with a non-slip portion.

Preferably, a finger pressing portion extends outward from the outer side of the bottom end of the sleeve body.

The invention has novel structure, good sealing effect, simple operation and convenient administration, and can ensure that the medicine can be stored for a longer time.

Description of drawings

Fig. 1 is the structural representation of the existing gynecological drug delivery device;

Fig. 2 is the structural representation of the present invention;

Fig. 3 is the front view of the present invention;

4 is a cross-sectional view of FIG. 3 along the A-A direction;

Fig. 5 is a partial enlarged view at B in Fig. 4;

6 is a schematic structural diagram of the present invention during administration;

Fig. 7 is a partial enlarged view at C in Fig. 6;

Fig. 8 is the structural representation of the sheath in the invention;

Among them: 1—the main body of the casing; 2—the push rod; 3—the rubber plug; 4—the rubber plug running section; 5—the ejection section of the push rod; 6—the drug outlet; - Internal thread hole; 10 - sealing sleeve; 11 - groove; 12 - annular step; 13 - anti-skid part; 14 - finger pressing part.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 2 to FIG. 8 , the present invention provides a gynecological drug delivery device, which includes a cannula body 1 for storing medicine, a push rod 2 located in the cannula body 1 , which is arranged on the top of the push rod 2 and is connected with the cannula. The rubber plug 3 with the inner sidewall of the main body 1 closely fitted, the casing body 1 includes the upper rubber plug running section 4 and the lower push rod ejection section 5, the inner diameter of the push rod ejection section 5 is larger than the rubber plug running section 4, the front end of the casing main body 1 is provided with a medicine outlet 6, and the outer side of the medicine outlet 6 is threadedly connected with a sheath 7, and the sheath 7 and the front end of the casing main body 1 are taper-fitted to achieve sealing, The rear end of the casing main body 1 is threadedly connected with a back cover 8 , and the rear cover 8 and the rear end of the casing main body 1 are taper-fitted to achieve sealing. Diameter, the front end of the sheath 7 can be inserted from the tail of the inner side wall of the push rod ejection section 5 and held at the tail of the push rod 2 to push the medicine forward.

Preferably, an internal thread hole 9 is machined on the front end face of the sleeve body 1 , the internal thread hole 9 is located outside the medicine outlet 6 and is arranged concentrically with the medicine outlet 6 , and the inner side wall of the inner thread hole 9 is formed by The inner surface of the top of the sheath 7 is provided with a downwardly extending sealing sleeve 10, the outer surface of the sealing sleeve 10 is provided with an external thread, and the sheath 7 passes through the seal on it. The sleeve 10 is threadedly connected to the inner threaded hole 9 of the sleeve body 1 , and the inner surface of the sealing sleeve 10 is tightly fitted on the conical surface of the inner threaded hole 9 after the sheath 7 is threadedly connected to the sleeve body 1 . form a seal.

Preferably, the lower part of the sealing sleeve 10 is provided with a groove 11 penetrating the side wall for easy demolding, so that the sealing sleeve 10 can be easily deformed when subjected to force. On the one hand, it is convenient for demoulding during injection molding, and on the other hand And the matching seal at the drug outlet 6.

Preferably, the top of the tapered surface of the inner side wall of the inner threaded hole 9 is provided with a chamfer.

Preferably, the front end surface of the pipe wall of the drug outlet 6 is higher than the front end surface of the casing main body 1 outside the inner threaded hole 9 .

Preferably, the outer side wall at the front end of the sleeve body 1 is gradually inclined inward from bottom to top and smoothly transitions with the front end surface.

Preferably, an annular step 11 is provided on the inner bottom surface of the rear cover 8 , the inner side wall of the tail end of the casing main body 1 is gradually inclined outward from top to bottom, and the outer side wall of the tail end of the casing main body 1 is provided with external threads The inner side wall of the rear cover 8 is provided with internal threads that cooperate with each other. When the rear cover 8 is threaded on the casing main body 1, the annular step 11 closely fits on the inner wall of the rear end of the casing main body 1 to form a seal.

Preferably, the outer side wall of the lower end of the sheath 7 is provided with a non-slip portion 12 .

Preferably, the outer side wall of the rear cover 8 is provided with a non-slip portion 12 .

Preferably, a finger pressing portion 13 extends outward from the outer side of the bottom end of the sleeve body 1 .

When the medicine is stored, the medicine itself is stored in the casing body 1, the front end of the medicine is sealed by the cooperation of the sheath 7 and the medicine outlet 6, the first layer of sealing of the rear end of the medicine is achieved by the rubber plug 3, and the second layer of sealing is achieved by The cooperation between the sleeve body 1 and the rear cover 8 is realized, which ensures that the medicine will not leak out from the front end or the rear end during the storage process. When in use, unscrew the front cover 7 and the rear cover 8, insert the sheath 7 from the rear of the casing body 1, so that the front end of the sheath 7 abuts against the rear end of the push rod 2, and pushes it forward The sheath 7 pushes the medicine out of the medicine outlet 6 through the push rod 2 and the rubber stopper 3 to achieve drug delivery. The whole operation is simple and quick, and meanwhile, the sealing effect of the medicine is good.

The above are only preferred embodiments of the present invention, and do not limit the invention in any form. Any simple modifications, equivalent changes or modifications made to the above embodiments according to the technical principles of the present invention still belong to the present invention. within the scope of the technical solution of the invention.

Claims (10)

1. A gynecological drug delivery device, comprising a sleeve body (1) for storing medicine, a push rod (2) located in the sleeve body (1), arranged on the top of the push rod (2) and connected to the sleeve body (1). ) A rubber stopper (3) whose inner sidewall is closely fitted, characterized in that: the casing body (1) includes an upper rubber stopper running section (4) and a lower push rod ejection section (5). The inner diameter of the rod ejection section (5) is larger than the inner diameter of the rubber plug running section (4). A sleeve (7), the sleeve (7) is fitted with a taper at the front end of the casing main body (1) to achieve sealing, and a rear cover (8) is threadedly connected to the rear end of the casing main body (1). (8) The taper cooperates with the rear end of the casing main body (1) to achieve sealing, the inner diameter of the push rod ejection section (5) is larger than the outer diameter of the front end of the sheath (7), and the front end of the sheath (7) can be Insert the tail end of the inner side wall of the ejection section (5) of the push rod and hold it at the tail of the push rod (2) to push the medicine forward. 2. A gynecological drug delivery device according to claim 1, characterized in that: an inner thread hole (9) is processed on the front end face of the sleeve body (1), and the inner thread hole (9) is located at the outlet The outer side of the medicine port (6) is arranged concentrically with the medicine outlet (6), the inner side wall of the inner threaded hole (9) is inclined inward from bottom to top to maintain the taper, and the inner side of the top of the sheath (7) is provided with a direction A sealing sleeve (10) extending downward, the outer surface of the sealing sleeve (10) is provided with an external thread, and the sheath (7) is threadedly connected to the sleeve body (1) through the sealing sleeve (10) thereon ), the inner surface of the sealing sleeve (10) closely fits the tapered surface of the inner threaded hole (9) after the sheath (7) is threadedly connected to the sleeve body (1). form a seal. 3. A gynecological drug delivery device according to claim 2, characterized in that: the lower part of the sealing sleeve (10) is provided with a cut groove (11) penetrating the side wall of the sealing sleeve (10) for easy demolding. 4. A gynecological drug delivery device according to claim 2, characterized in that: the top of the tapered surface of the inner side wall of the inner threaded hole (9) is provided with a chamfer. 5. A gynecological drug delivery device according to claim 2, characterized in that: the front end surface of the tube wall of the drug outlet (6) is higher than the sleeve body (1) outside the inner threaded hole (9). front face. 6. A gynecological drug delivery device according to claim 1 or 2, characterized in that: the outer wall at the front end of the sleeve body (1) is gradually inclined inward from bottom to top and smoothly transitions with the front end surface. 7. A gynecological drug delivery device according to claim 1, characterized in that: an annular step (12) is provided on the inner bottom surface of the rear cover (8), and the inner wall of the tail end of the sleeve body (1) is provided with an annular step (12). It is gradually inclined outward from top to bottom, the outer side wall of the tail end of the casing main body (1) is provided with external threads, the inner side wall of the rear cover (8) is provided with internal threads that cooperate with each other, and the rear cover (8) When screwed on the casing main body (1), the annular step (12) closely fits on the inner side wall of the rear end of the casing main body (1) to form a seal. 8. A gynecological drug delivery device according to claim 1, characterized in that: a non-slip portion (13) is provided on the outer side wall of the lower end of the sheath (7). 9. A gynecological drug delivery device according to claim 1, characterized in that: a non-slip portion (13) is provided on the outer side wall of the rear cover (8). 10 . The gynecological medicine applicator according to claim 1 , wherein a finger pressing portion ( 14 ) extends outward from the outer side of the bottom end of the sleeve body ( 1 ). 11 .

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