Injector capable of controlling dosage

Abstract

The invention provides an injector capable of controlling dosage, and relates to the technical field of injection equipment. Comprising a syringe needle cylinder and a push rod, an extraction opening is formed in the inner bottom face of the syringe needle cylinder, a syringe needle is arranged on the bottom face of the syringe needle cylinder, a first threaded groove and a vertical sliding groove are formed in the outer side of the syringe needle cylinder, and the first threaded groove is in threaded connection with a limiting bolt; a positioning piece is fixedly arranged on the push rod, a vertical sliding groove is formed in the outer side of the syringe needle cylinder, and the positioning piece is in sliding connection with the vertical sliding groove; compared with the prior art, the dose needing to be extracted can be determined in advance or the injection dose can be accurately controlled, the accurate dose can be conveniently and directly extracted or injected, excessive or insufficient extraction and injection are avoided, and the working efficiency and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of injection equipment, in particular to a dose-controllable syringe. Background Art

[0002] With the advancement of medical technology, medical operations are becoming more and more stringent, and injections are the basis of the medical process, and most medical processes require injections. Existing injection technologies are basically divided into two types: one is the disposable injection needles routinely used by medical staff. This injection method needs to be completed in the hospital under the supervision of medical staff. It is to inject a large dose of injection solution into the human body at one time, and is used for routine treatment of patients inside and outside the hospital; the other is a syringe dedicated to insulin that can precisely control the dosage, which is specifically for diabetic patients. This syringe that can precisely control the dosage is more expensive.

[0003] Some special patients in clinical practice, such as diabetic patients, hepatitis patients, etc., need to be injected with insulin, interferon growth factor, vaccines, etc., and in most cases, the patients are required to be able to inject themselves, and the injection dose needs to be accurately controlled during precise treatment of special parts. However, most existing injection devices are complex in structure and inconvenient to use. They cannot be adjusted according to the needs of patients, and the dose cannot be limited well during injection, which easily leads to errors.

[0004] Therefore, there is an urgent need for a dose-controllable syringe to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a dose-controllable syringe, which can determine the dose to be drawn in advance or accurately control the injected dose, facilitate direct drawing of an accurate dose or injection of an accurate dose, avoid drawing or injecting too much or too little, and improve work efficiency and accuracy.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dose-controllable syringe, comprising a syringe barrel and a push rod, an extraction port is provided on the inner bottom surface of the syringe barrel, a syringe needle is provided on the bottom surface of the syringe barrel, a first thread groove and a vertical slide groove are provided on the outer side of the syringe barrel, and the first thread groove is threadedly connected to a limiting bolt; a positioning piece is fixedly provided on the push rod, a vertical slide groove is provided on the outer side of the syringe barrel, and the positioning piece is slidably connected to the vertical slide groove.

[0007] In some embodiments of the present invention, an injection piston is disposed at the bottom of the push rod, and the bottom surface of the positioning member is at the same level as the bottom surface of the injection piston.

[0008] In some embodiments of the present invention, scale lines are arranged on the outer wall of the syringe barrel, and the scale lines are located inside the vertical slide groove.

[0009] In some embodiments of the present invention, a rubber ring is provided at the bottom of the limiting bolt.

[0010] In some embodiments of the present invention, a second thread groove is provided on the outer side of the above-mentioned limiting bolt, a fastening bolt is threadedly connected to the second thread groove, a limiting ring is connected under the fastening bolt, and the inner diameter of the limiting ring gradually decreases from top to bottom.

[0011] In some embodiments of the present invention, the outer diameter of the rubber ring is the same as the maximum inner diameter of the limiting ring.

[0012] In some embodiments of the present invention, the positioning member is in the shape of a cylinder with an opening at the bottom, and the push rod is located at the axis of the positioning member.

[0013] In some embodiments of the present invention, the positioning member is made of a transparent material.

[0014] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0015] Most of the existing injection devices are complex in structure, inconvenient to use, cannot be adjusted according to the needs of patients, and cannot be well restricted during injection, which is easy to cause errors. The present invention provides a dose-controllable syringe, including a syringe barrel and a push rod, the inner bottom surface of the syringe barrel is provided with an extraction port, the bottom surface of the syringe barrel is provided with a syringe needle, the outer side of the syringe barrel is provided with a first thread groove and a vertical slide groove, the first thread groove is threadedly connected with a limiting bolt; the push rod is fixedly provided with a positioning piece, the outer side of the syringe barrel is provided with a vertical slide groove, and the positioning piece is slidably connected with the vertical slide groove.

[0016] The present invention provides a first thread groove on the outer side of the syringe barrel, so that medical staff can move the limit bolt to a predetermined height by rotating the limit bolt, so that when the push rod is pushed, the positioning member is blocked by the limit bolt and cannot move downward, thereby achieving the effect of precise injection and accurately controlling the injection dose. At the same time, the threaded limit bolt will not move due to the vertical downward force of the positioning member, thereby preventing it from moving unnecessarily and affecting the injection dose. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a front view of an embodiment of the present invention;

[0019] Figure 2 It is a cross-sectional view of an embodiment of the present invention.

[0020] Icons: 1. Syringe barrel; 2. Needle; 3. First thread groove; 4. Positioning piece; 5. Vertical slide groove; 6. Limit bolt; 7. Second thread groove; 8. Fastening bolt; 9. Rubber ring; 10. Push rod; 11. Shell frame; 12. Injection piston. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example:

[0024] Please refer to Figure 1-2 This embodiment provides a dose-controllable syringe, comprising a syringe barrel 1 and a push rod 10. The inner bottom surface of the syringe barrel 1 is provided with an extraction port, the bottom surface of the syringe barrel 1 is provided with a syringe needle 2, the outer side of the syringe barrel 1 is provided with a first thread groove 3 and a vertical slide groove 5, the first thread groove 3 is threadedly connected to a limiting bolt 6; the push rod 10 is fixedly provided with a positioning piece 4, the outer side of the syringe barrel 1 is provided with a vertical slide groove 5, and the positioning piece 4 is slidably connected to the vertical slide groove 5.

[0025] Most of the existing injection devices are complex in structure and inconvenient to use. They cannot be adjusted according to the needs of patients, and they cannot be well restricted during injection, which is easy to cause errors. The present invention sets a first thread groove 3 on the outside of the syringe barrel 1, so that medical staff can move the limit bolt 6 to the expected height by rotating the limit bolt 6, so that when the push rod 10 is pushed, the positioning member 4 will be blocked by the limit bolt 6 and cannot move downward, so as to achieve the effect of precise injection and accurately control the injection dose. At the same time, the threaded limit bolt 6 will not move due to the vertical downward force of the positioning member 4, avoiding its unnecessary movement to affect the injection dose; and the setting of the vertical slide groove 5 effectively limits the push rod 10, avoiding the horizontal rotation of the push rod 10, and further increasing the injection stability.

[0026] In some embodiments of the present invention, an injection piston 12 is provided at the bottom of the push rod 10, and the bottom surface of the positioning member 4 is at the same level as the bottom surface of the injection piston 12. Graduation lines are provided on the outer wall of the syringe barrel 1, and the graduation lines are located inside the vertical slide groove 5. The bottom surface of the positioning member is at the same level as the bottom surface of the injection piston 12, so that medical staff can effectively judge the injection volume by comparing the graduation lines at the upper and lower ends of the two, and it is also convenient for medical staff to adjust the position of the limit bolt 6 before injection; the graduation lines are located inside the vertical slide groove 5, which is convenient for medical staff to quickly find the position of the graduation lines and avoid the graduation lines from being worn due to the friction of the limit bolt 6.

[0027] In some embodiments of the present invention, a rubber ring 9 is provided at the bottom of the limiting bolt 6. The rubber ring 9 provided at the bottom of the limiting bolt 6 can increase the rotational friction of the limiting bolt 6 and avoid unnecessary sliding.

[0028] In some embodiments of the present invention, a second thread groove 7 is provided on the outer side of the limiting bolt 6, and a fastening bolt 8 is threadedly connected to the second thread groove 7. A limiting ring is connected below the fastening bolt 8, and the inner diameter of the limiting ring gradually decreases from bottom to top. The outer diameter of the upper end of the rubber ring 9 is the same as the minimum inner diameter of the limiting ring, and the outer diameter of the rubber ring 9 gradually decreases from top to bottom. The inner diameter of the limiting ring gradually decreases from top to bottom, so that after the fastening bolt 8 rotates and moves upward, it will squeeze the rubber ring 9, so that it is close to the first thread groove 3, further increasing the stability of the limiting bolt 6.

[0029] In some embodiments of the present invention, the positioning member 4 is provided in a cylindrical shape with an opening at the bottom, and the push rod 10 is located at the axis of the positioning member 4. The positioning member 4 is made of a transparent material. The positioning member 4 made of a transparent material is convenient for medical staff to observe the internal situation of the syringe barrel 1. The positioning member 4 provided in a cylindrical shape is more stable. Specifically, two vertical slide grooves 5 can be symmetrically provided.

[0030] In summary, the embodiment of the present invention provides a dose-controllable syringe, including a syringe barrel 1 and a push rod 10, wherein the inner bottom surface of the syringe barrel 1 is provided with an extraction port, the bottom surface of the syringe barrel 1 is provided with a syringe needle 2, the outer side of the syringe barrel 1 is provided with a first thread groove 3 and a vertical slide groove 5, the first thread groove 3 is threadedly connected to a limit bolt 6; the push rod 10 is fixedly provided with a positioning member 4, the outer side of the syringe barrel 1 is provided with a vertical slide groove 5, and the positioning member 4 is slidably connected to the vertical slide groove 5. The present invention provides a first thread groove 3 on the outer side of the syringe barrel 1, so that medical staff can move the limit bolt 6 to the expected height by rotating the limit bolt 6, so that when the push rod 10 is pushed, the positioning member 4 will be blocked by the limit bolt 6 and cannot move downward, thereby achieving the effect of precise injection and accurately controlling the injection dose. At the same time, the threaded limit bolt 6 will not move due to the vertical downward force of the positioning member 4, thereby avoiding unnecessary movement thereof to affect the injection dose.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dose-controllable syringe, characterized in that: It includes a syringe barrel and a push rod, wherein the inner bottom surface of the syringe barrel is provided with an extraction port, the bottom surface of the syringe barrel is provided with a syringe needle, the outer side of the syringe barrel is provided with a first threaded groove and a vertical slide groove, and the first threaded groove is threadedly connected to a limiting bolt; the push rod is fixedly provided with a positioning piece, and the outer side of the syringe barrel is provided with a vertical slide groove, and the positioning piece is slidably connected to the vertical slide groove.

2. A dose-controllable syringe according to claim 1, characterized in that: An injection piston is arranged at the bottom of the push rod, and the bottom surface of the positioning member is at the same level as the bottom surface of the injection piston.

3. A dose-controllable syringe according to claim 2, characterized in that: The outer wall of the syringe barrel is provided with scale lines, and the scale lines are located inside the vertical slide groove.

4. A dose-controllable syringe according to claim 1, characterized in that: A rubber ring is arranged at the bottom of the limiting bolt.

5. A dose-controllable syringe according to claim 4, characterized in that: A second thread groove is arranged on the outer side of the limiting bolt, a fastening bolt is threadedly connected to the second thread groove, a limiting ring is connected below the fastening bolt, and the inner diameter of the limiting ring gradually decreases from top to bottom.

6. A dose-controllable syringe according to claim 5, characterized in that: The outer diameter of the rubber ring is the same as the maximum inner diameter of the limiting ring.

7. A dose-controllable syringe according to claim 1, characterized in that: The positioning member is in the shape of a cylinder with an opening at the bottom, and the push rod is located at the axis center of the positioning member.

8. A dose-controllable syringe according to claim 7, characterized in that: The positioning piece is made of transparent material.

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