Telescopic injector
By designing a telescopic syringe, a sleeve and spring structure are used to safely store the syringe, solving the problems of needle exposure and accidental puncture in traditional syringes, and improving safety and stability in use.
Patent Information
- Application Number
- CN202422184983.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-09-06
AI Technical Summary
Traditional syringes are difficult to prevent accidental needle punctures and needle cap detachment after use, and the needle is easily exposed during injection, posing a safety hazard.
Design a telescopic syringe that uses a sleeve and spring structure to store the syringe barrel inside the sleeve, and uses a push-pull rod and connecting rod to perform injection or aspiration operations. The syringe also uses a limiting structure and a convex ring to prevent the needle from being exposed, thus achieving safe storage.
It improves the safety of syringe use, provides a stable grip and prevents accidental needle puncture, and ensures that the needle is fully retracted when not in use to prevent the needle cap from falling off.
Smart Images
Figure CN223438948U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of syringe technology, in particular to a telescopic syringe. BACKGROUND
[0002] The appearance of the syringe is a revolutionary change in the field of medical equipment. The process of extracting, injecting gas or liquid with a needle is called injection. The syringe is composed of a needle cylinder with a small hole at the front end and a piston core rod matched with it, which is used to inject a small amount of liquid or to extract it from other methods that cannot access the area, and the liquid or gas is sucked into the small hole at the front end of the needle cylinder when the core rod is pulled out, and the liquid or gas is squeezed out when the core rod is pushed in.
[0003] The steel sharp and slender needle is easy to pierce into the patient's body for treatment, and also easy to cause injury to others. Although the syringe is provided with a needle cap, sometimes the doctor cannot spare time to put the needle cap on the needle cylinder after the injection is completed, and after the used syringe is capped, it will also fall off during the transportation process. In addition, during the whole process of extraction and injection of the syringe, the needle is basically in an exposed state, which is easy to cause needle puncture. SUMMARY
[0004] To solve the above problems, the present application discloses a telescopic syringe, which comprises a sleeve, an inside of the sleeve is axially slidably provided with a needle cylinder, a lower end of the needle cylinder is provided with a spring, and a lower end of the spring abuts against an inner wall of the lower end of the needle cylinder. The sleeve covers the needle cylinder inside, and under the action of the spring, the needle cylinder is kept inside the sleeve
[0005] An inside of the needle cylinder is provided with a piston, an upper end of the piston is fixedly connected with a push-pull rod, an upper end of the push-pull rod is fixedly connected with a connecting rod, and the other end of the connecting rod is fixedly connected with a vertically arranged push rod. The middle part of the sleeve is gripped, the thumb pushes the push rod, the piston is actuated by means of the connecting rod and the push-pull rod, and then injection or suction operation is carried out. In the above structure, the needle cylinder is stored by means of the sleeve and the spring, which greatly improves the safety of the syringe.
[0006] Preferably, a side wall of the sleeve is provided with a second opening, and the connecting rod extends out of the second opening. The second opening is located on the upper side wall of the sleeve, the second opening is opened along the axial direction of the sleeve, and the length of the second opening meets the injection stroke of the needle cylinder.
[0007] Preferably, a side wall of the needle cylinder is fixedly connected with a convex column, and an end of the convex column is fixedly connected with a block. The block is used to pull the needle cylinder, that is, to pull the needle cylinder downward and compress the spring.
[0008] Preferably, the side wall of the sleeve is provided with a first opening, and a lower end of the first opening is provided with an upper concave limiting opening in communication on one side, and the convex column is located in the first opening. The limiting opening is used for limiting the convex column, when the convex column slides to the bottom of the first opening, the axial rotating knob is used to make the convex column enter the limiting opening and keep the position of the needle cylinder, avoiding the needle cylinder resetting under the action of the spring. After the injection or suction is finished, the knob is axially rotated in the opposite direction, so that the convex column falls into the first opening, and the needle cylinder resets under the action of the spring.
[0009] Preferably, the lower end of the needle cylinder is fixedly connected with a needle, and the lower end of the sleeve is provided with a through hole in the middle, and the through hole is located directly below the needle. When the needle cylinder is located at the lower part of the sleeve, the needle extends out of the through hole for injection or suction operation, and the spring is compressed here, and when the spring releases the elastic potential energy, the needle cylinder is located at the middle of the sleeve, and the needle is stored in the interior of the sleeve, thereby playing a protection role and avoiding being mistakenly pricked by the needle.
[0010] Preferably, the inner wall of the sleeve is provided with a convex ring, and when the needle is completely stored in the interior of the sleeve, the upper end of the needle cylinder just abuts against the convex ring. The convex ring also plays a limiting role, avoiding the upper end of the connecting rod abutting against the interior of the sleeve under the action of the spring, causing the liquid in the needle cylinder to leak out.
[0011] The beneficial effects of the present application are as follows:
[0012] 1. The needle cylinder and the needle are stored in the interior of the sleeve by the spring, thereby greatly improving the safety of use of the injector.
[0013] 2. The injector is used in a holding manner, and compared with the use manner of the traditional injector, the holding use of the injector is more stable. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a perspective view of the present application;
[0015] Figure 2 is an exploded view of the present application;
[0016] Figure 3 is a sectional view of the present application;
[0017] Figure 4 is Figure 1 is an enlarged view of A in the figure;
[0018] Figure 5 is Figure 3 is an enlarged view of B in the figure.
[0019] LIST OF REFERENCE NUMBERS:
[0020] 1. Sleeve; 2. First opening; 3. Push rod; 4. Second opening; 5. Spring; 6. Syringe; 7. Shift block; 8. Connecting rod; 9. Push-pull rod; 10. Piston; 11. Through hole; 12. Needle; 13. Limit opening; 14. Raised ring. DETAILED DESCRIPTION
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.
[0022] like Figures 1 to 5 As shown, a telescopic syringe includes a sleeve 1, which is cylindrical. A syringe 6 is axially slidably provided inside the sleeve 1. The syringe 6 is placed inside the sleeve 1 to play a protective role. A spring 5 is provided at the lower end of the syringe 6. The lower end of the spring 5 rests against the inner wall of the lower end of the syringe 6. Under the action of the spring 5, the syringe 6 can be kept retracted inside the sleeve 1.
[0023] The syringe 6 is provided with a piston 10, which is a conventional structure within the syringe 6. The upper end of the piston 10 is fixedly connected to a push-pull rod 9, which is fixedly connected to a connecting rod 8 at its upper end. The connecting rod 8 is L-shaped, and the other end of the connecting rod 8 is fixedly connected to a vertically arranged push rod 3. When using the syringe, four fingers grasp the sleeve 1 and the thumb pushes the push rod 3. The action of the connecting rod 8, push-pull rod 9, and piston 10 completes the injection or aspiration operation. To improve the operation effect, the surface of the push rod 3 is provided with a number of convex patterns to enhance the pushing effect of the thumb.
[0024] The side wall of the sleeve 1 is provided with a second opening 4 , the first opening 4 is opened along the axial direction of the sleeve 1 , the connecting rod 8 extends from the second opening 4 , and the length of the second opening 4 meets the operating stroke of the syringe 6 .
[0025] The side wall of the needle cylinder 6 is fixedly connected with a boss, and the end of the boss is fixedly connected with a shift block 7. By shifting the shift block 7, the needle cylinder 6 can be slid in the axial direction, that is, whether the spring 5 is compressed.
[0026] The side wall of the sleeve 1 is provided with a first opening 2, and the lower end of the first opening 2 is connected to a concave limit opening 13. The boss is located in the first opening 2. When the spring 5 is compressed, the action of the spring 5 is avoided, so that the syringe 6 is reset, and the boss rotates axially into the limit opening 13 to maintain the position of the syringe 6.
[0027] The lower end of the needle cylinder 6 is fixedly connected with a needle 12, and the lower end of the sleeve 1 is provided with a through hole 11 which is located directly below the needle 12; when the spring 5 is extended and the convex column is fitted in the limiting hole 13, the needle 12 can be completely extended from the through hole 11, and the injection or suction operation can be performed.
[0028] The inner wall of the sleeve 1 is provided with a convex ring 14, and when the needle 12 is completely collected in the sleeve 1, the upper end of the needle cylinder 6 is just abutted against the convex ring 14; that is, after the elastic potential energy of the spring 5 is released, the needle 12 and the needle cylinder 6 are completely collected in the sleeve 1, which plays a protective role and avoids accidental injury caused by the needle 12; and the convex ring 14 is arranged to avoid that, under the reset of the spring 5, the connecting rod 8 abuts against the upper end of the sleeve 1 to cause the liquid in the needle cylinder 6 to flow out, so that the convex ring 14 plays a limiting role for the needle cylinder 6, and the connecting rod 8 and the upper part of the sleeve 1 are kept at a certain distance.
[0029] The technical means disclosed in the scheme of the application is not limited to the technical means disclosed in the above-mentioned embodiments, and also includes technical solutions composed of any combination of the above technical features.
Claims
1. A telescopic syringe, characterized in that: It comprises a sleeve (1), a syringe (6) is axially slidably provided inside the sleeve (1), a spring (5) is provided at the lower end of the syringe (6), and the lower end of the spring (5) abuts against the inner wall of the lower end of the syringe (6); A piston (10) is provided inside the syringe (6), the upper end of the piston (10) is fixedly connected to a push-pull rod (9), the upper end of the push-pull rod (9) is fixedly connected to a connecting rod (8), and the other end of the connecting rod (8) is fixedly connected to a vertically arranged pushing rod (3).
2. A retractable syringe according to claim 1, characterized in that: A second opening (4) is provided on the side wall of the sleeve (1), and the connecting rod (8) extends from the second opening (4).
3. The retractable syringe according to claim 1, characterized in that: A convex column is fixedly connected to the side wall of the needle cylinder (6), and a shift block (7) is fixedly connected to the end of the convex column.
4. A retractable syringe according to claim 3, characterized in that: The side wall of the sleeve (1) is provided with a first opening (2), and a concave limiting opening (13) is provided on one side of the lower end of the first opening (2), and the convex column is located in the first opening (2).
5. The retractable syringe according to claim 1, characterized in that: The lower end of the syringe (6) is fixedly connected to a needle (12), and a through hole (11) is provided in the middle of the lower end of the sleeve (1), and the through hole (11) is located directly below the needle (12).
6. A retractable syringe according to claim 5, characterized in that: The inner wall of the sleeve (1) is provided with a convex ring (14), so that when the needle (12) is completely retracted inside the sleeve (1), the upper end of the syringe (6) just abuts against the convex ring (14).