Cavity administration device

Abstract

The utility model discloses a cavity administration device which comprises a cylinder body and a push rod, one end of the cylinder body is an administration end, the other end of the cylinder body is provided with a limiting part, one end of the push rod is arranged in the cylinder body, a first piston and a second piston are arranged at the end, the other end of the push rod penetrates through the limiting part and extends outwards, and the end, extending outwards, of the push rod is pushed / pulled. And the first piston and the second piston slide along the inner wall of the barrel. According to the cavity administration device, the first piston and the second piston are arranged at one end of the push rod at the same time, so that the leakproofness of the push rod can be guaranteed, the push rod can be conveniently pushed when medicine is injected, and the medicine is prevented from leaking to the barrel from the sealing position of the push rod; the contact area between the first piston and the inner wall of the barrel can be reduced through the first piston in the shape of the circular truncated cone, so that the friction force between the first piston and the inner wall of the barrel is reduced, the push rod can be pushed or pulled more smoothly in a labor-saving mode, finally, the sealing effect of the cavity administration device is good, and pushing administration can be conducted conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a cavity drug delivery device. Background Art

[0002] Rectal, genital tract, oral and other drug delivery systems refer to drugs placed in the rectum, vagina, cervix, or mouth, and absorbed into the local or systemic blood circulation through the mucous membranes of the rectum, genital tract, and oral cavity for sterilization, disinfection, and treatment. The dosage forms mainly include suppositories, films, creams, tablets, solutions, gels, and capsules. Currently, simple injectors are generally used for drug administration.

[0003] The drug delivery device in the prior art generally includes a syringe and a push rod. However, when the push rod of the drug delivery device has poor sealing performance, when the drug is injected into the syringe from the drug delivery end, the drug cannot be squeezed out of the push rod, or the drug leaks from the seal of the push rod into the syringe; when the friction between the seal of the push rod and the inner wall of the syringe is too large, it will cause the push rod to be laborious when delivering the drug. Therefore, the drug delivery device in the prior art has the problem of difficulty in balancing sealing performance and practicality. Utility Model Content

[0004] The utility model aims to provide a cavity drug delivery device which has good sealing effect and is convenient for pushing drug delivery.

[0005] In order to solve the above technical problems, the present invention can be implemented by adopting the following technical solutions:

[0006] A cavity drug delivery device comprises a barrel and a push rod, wherein one end of the barrel is a drug delivery end and the other end is provided with a limiting portion, one end of the push rod is placed in the barrel, and a first piston and a second piston are arranged at this end, and the other end of the push rod extends outward through the limiting portion, and the outwardly extending end of the push rod is pushed / pulled to make the first piston and the second piston slide along the inner wall of the barrel.

[0007] In one embodiment, the first piston is disposed at the end of the push rod, and a gap is formed between the second piston and the first piston.

[0008] In one embodiment, the first piston is in a frustum-shaped form, and a small frustum-shaped surface of the first piston is connected to the end of the push rod.

[0009] In one embodiment, the large circular table surface of the first piston is a plane or an arc surface, and a friction portion is provided on the side of the large circular table surface.

[0010] In one embodiment, a buckle position is provided on the inner wall of the administration end of the barrel.

[0011] In one embodiment, the end of the drug delivery end of the barrel is arc-shaped.

[0012] In one embodiment, the limiting portion is arranged to protrude outward.

[0013] In one embodiment, the wall thickness of the limiting portion is greater than the wall thickness of the cylinder.

[0014] In one embodiment, a first limiting member and a second limiting member are disposed at one end of the push rod extending outward, and a gap is formed between the first limiting member and the second limiting member.

[0015] In one embodiment, an inclined surface is provided on a side of the second limiting member away from the first limiting member. Beneficial Effects

[0016] The utility model cavity drug delivery device sets one end of the push rod in the cylinder body, and sets the first piston and the second piston at this end, and a gap is formed between the first piston and the second piston. By setting the first piston and the second piston at the same time, the sealing of the push rod can be ensured, which is convenient for pushing the push rod when injecting the drug and avoiding the drug from leaking from the push rod seal to the cylinder body; in addition, the first piston is in the shape of a truncated cone, and the contact area between the first piston and the inner wall of the cylinder body can be reduced by the truncated cone-shaped first piston, thereby reducing the friction between the first piston and the inner wall of the cylinder body, so that the push rod can be pushed / pulled more smoothly and easily, and finally the cavity drug delivery device has a good sealing effect and can be convenient for pushing and drug delivery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the cavity drug delivery device of the utility model;

[0018] Figure 2 This is a schematic diagram of the barrel structure of the cavity drug delivery device of the utility model;

[0019] Figure 3 This is a schematic diagram of the push rod structure of the cavity drug delivery device of the utility model;

[0020] Figure 4 The utility model is a cavity drug delivery device Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 The utility model is a cavity drug delivery device Figure 3 Enlarged view of point B in the middle.

[0022] As shown in the attached figure:

[0023] 100, cylinder; 110, dosing end; 120, limiter; 130, buckle;

[0024] 200, push rod; 210, first piston; 211, friction part; 220, second piston; 230, first stopper; 240, second stopper; 241, inclined surface. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only."

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] See also Figures 1 to 5 A cavity drug delivery device includes a barrel 100 and a push rod 200. One end of the barrel 100 is a drug delivery end 110, and the other end is provided with a limiting portion 120. One end of the push rod 200 is placed in the barrel 100, and a first piston 210 and a second piston 220 are provided at this end. The other end of the push rod 200 extends outward through the limiting portion 120. Pushing / pulling the end of the push rod 200 extending outward causes the first piston 210 and the second piston 220 to slide along the inner wall of the barrel 100.

[0029] Specifically, in the present embodiment, one end of the barrel 100 is open, which is the drug delivery end 110. The medicine bottle is connected to the drug delivery end 110 of the barrel 100, and the paste-like medicine is squeezed in from the drug delivery end 110. One end of the push rod 200 is arranged in the barrel 100, and a first piston 210 and a second piston 220 are arranged at this end. The first piston 210 and the second piston 220 can ensure the sealing of the push rod 200, so that when the medicine is squeezed in, the push rod 200 can be pushed to move, and the medicine can be prevented from leaking from the sealing part of the push rod 200 to the barrel 100. When the medicine is squeezed in, the drug delivery end 110 of the barrel 100 is extended into the cavity, and the push rod 200 is pushed. The first piston 210 and the second piston 220 of the push rod 200 slide along the inner wall of the barrel 100, and push the medicine into the affected area, thereby achieving drug delivery.

[0030] At the same time, in this embodiment, the first piston 210 is arranged at the end of the push rod 200, and a gap is formed between the second piston 220 and the first piston 210, and the first piston 210 is in a truncated cone shape, and the small truncated cone surface of the first piston 210 is connected to the end of the push rod 200. The first piston 210 is provided with the end of the push rod 200, which can facilitate the pushing and administration of the drug, and the second piston 220 and the second piston 210 form a gap, so that the push rod can form a double-layer seal, thereby improving the sealing effect of the drug delivery device. In addition, since the shape of the first piston 210 is a truncated cone, and the truncated cone-shaped first piston 2 The small conical surface of 10 is connected to the end of the push rod 200, and the large conical surface forms a sealed connection with the inner wall of the cylinder 100. The conical design can reduce the contact area between the first piston 210 and the inner wall of the cylinder 100, thereby reducing the friction between the first piston 210 and the inner wall of the cylinder 100, so that the push rod 200 can be pushed / pulled more smoothly and labor-saving. Finally, the first piston 210 and the second piston 220 can make the cavity drug delivery device better achieve the sealing effect, facilitate the pushing / pulling of the push rod 200, and facilitate the drug delivery operation of the cavity.

[0031] Of course, since the first piston 210 is in the shape of a truncated cone, the corners of its large truncated cone slide in a sealed manner with the inner wall of the cylinder 100. During the sliding, the corners will be worn, which will lead to poor sealing effect in the long run. In order to ensure the sealing effect, a friction portion 211 is provided at the side angle position of the large truncated cone of the first piston 210. The friction portion 211 can increase the number of frictions between the first piston 210 and the inner wall of the cylinder 100, thereby increasing the service life of the first piston 210 and ensuring the sealing effect of the first piston 210.

[0032] In addition, in the present embodiment, the large circular table surface of the first piston 210 is a plane. The plane setting can reduce the residual amount of the drug during administration, thereby maximizing the extrusion of the drug to the affected area and avoiding waste of the drug. Of course, in order to better match different drug tubes or drugs, the large circular table surface of the first piston 210 can also be set as an arc surface. By matching the arc surface with the corresponding drugs, such as capsules, the drugs can also be conveniently pushed to the affected area.

[0033] In order to facilitate the squeezing of the drug into the barrel 100, in the present embodiment, a buckle position 130 is provided on the inner wall of the drug delivery end 110 of the barrel 100. The buckle position 130 can be provided according to actual needs, such as providing a single buckle position 130 or multiple buckle positions 130. By providing the buckle position 130, it is convenient to match and connect the bottle mouth of the drug bottle or drug tube with the barrel 100, so as to facilitate squeezing the drug into the barrel 100.

[0034] And because the drug delivery end 110 of the barrel 100 needs to be extended into the cavity, in order to avoid damage to the cavity, in this embodiment, the end of the drug delivery end 110 of the barrel 100 is arc-shaped. The arc design can reduce the sharpness and avoid burrs, thereby improving the safety of the cavity applicator.

[0035] See also Figure 3 and Figure 5 In order to realize the drug administration function, one end of the push rod 200 in this embodiment is placed in the barrel 100, and the other end extends outward through the limiting portion 120. In order to limit the push rod 200, a first limiting member 230 and a second limiting member 240 are provided at the end of the push rod 200 extending outward, and a gap is formed between the first limiting member 230 and the second limiting member 240. The first limiting member 230 and the second limiting member 240 cooperate with the limiting portion 120 to limit the push rod 200, so as to avoid the push rod 200 being pushed out of the barrel 100 when pushing the drug administration, thereby avoiding the occurrence of medical accidents. The double limiting of the first limiting member 230 and the second limiting member 240 can ensure the limiting effect of the push rod 200.

[0036] At the same time, in order to avoid deformation of the limiting portion 120 when limiting the push rod 200, in this embodiment, the wall thickness of the limiting portion 120 is greater than the wall thickness of the cylinder 100. By increasing the wall thickness of the limiting portion 120, deformation of the limiting portion 120 can be effectively avoided, thereby ensuring the limitation of the push rod 200.

[0037] Finally, in order to facilitate the assembly of the push rod 200 and the cylinder 100, the limiting portion 120 at one end of the cylinder 100 is protruded outward, and an inclined surface 241 is provided on the side of the second limiting member 240 away from the first limiting member 230. Through the protruding setting of the limiting portion 120 and the inclined surface 241 of the second limiting member 240, the push rod 200 can be easily passed through the limiting portion 120, and it can be ensured that the limiting portion 120 can limit the push rod 200.

[0038] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Any technician in the industry can smoothly implement the utility model according to the drawings shown in the specification and the above description; however, any equivalent changes, modifications and evolutions made by any technician familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the scope of protection of the technical solution of the utility model.

Claims

1. A cavity drug delivery device, characterized in that: It includes a cylinder and a push rod, one end of the cylinder is a dosing end, and the other end is provided with a limiting portion, one end of the push rod is placed in the cylinder, and a first piston and a second piston are arranged at this end, and the other end of the push rod extends outward through the limiting portion, and the outwardly extending end of the push rod is pushed / pulled to make the first piston and the second piston slide along the inner wall of the cylinder.

2. The cavity drug delivery device according to claim 1, characterized in that: The first piston is arranged at the end of the push rod, and a gap is formed between the second piston and the first piston.

3. The cavity drug delivery device according to claim 2, characterized in that: The first piston is in a truncated cone shape, and the small truncated cone surface of the first piston is connected to the end of the push rod.

4. The cavity drug delivery device according to claim 3, characterized in that: The large circular table surface of the first piston is a plane or an arc surface, and a friction part is arranged on the side of the large circular table surface.

5. The cavity drug delivery device according to claim 1, characterized in that: The inner wall of the drug delivery end of the cylinder is provided with a buckle position.

6. The cavity drug delivery device according to claim 1, characterized in that: The end of the drug delivery end of the cylinder is in an arc shape.

7. The cavity drug delivery device according to claim 1, characterized in that: The limiting portion is arranged to protrude outwards.

8. The cavity drug delivery device according to claim 1, characterized in that: The wall thickness of the limiting portion is greater than the wall thickness of the cylinder.

9. The cavity drug delivery device according to claim 1, characterized in that: The end of the push rod extending outward is provided with a first limiting member and a second limiting member, and a gap is formed between the first limiting member and the second limiting member.

10. The cavity drug delivery device according to claim 9, characterized in that: A side of the second limiting member away from the first limiting member is provided with an inclined surface.

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