Reverse injector for treating tympanic effusion
By introducing the combination of gears and rectangular brackets into the reverse syringe, combined with the design of limit beads and return springs, the problems of instability in the suction and easy needle fall off in the prior art are solved, and safe and stable fluid extraction and Needle fixation.
Patent Information
- Application Number
- CN202420722875.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-09
AI Technical Summary
The existing reverse syringe for treating tympanic effusion is unstable during the aspiration process, which can easily lead to the needle being disengaged, and the needle and needle cap being easily disengaged.
A reverse syringe including a needle tube, a rotating shaft, a gear, a rectangular bracket, a piston and a return spring is designed. The reverse suction of the piston is achieved through the cooperation of the gear and a rectangular bracket, and the combination of the limit bead and the return spring is achieved. Ensure stable installation and fixation of the needle.
The piston is stable outwardly moved during the pushing process, and the accumulation of fluid is safely and effectively, and the needle is not easy to fall off, improving the stability and safety of operation.
Smart Images
Figure CN222265532U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of syringes, in particular to a reverse syringe for treating tympanic effusion. Background Art
[0002] The reverse syringe for treating tympanic effusion is a medical device used to treat ear problems. Tympanic effusion is the accumulation of fluid in the middle ear cavity, which may cause symptoms such as hearing loss, tinnitus, headaches, etc. The reverse syringe is often used to drain or aspirate the fluid in the tympanic cavity to relieve symptoms and promote recovery.
[0003] At present, when using a syringe to extract fluid from the tympanic cavity, the operator holds the otoscope in the left hand and the syringe in the right hand, and operates under direct vision. The advantages are accurate puncture points, little pain, and it is not easy to accidentally injure the structure in the ear. The disadvantages are that there is a certain technical difficulty, especially the action of holding the syringe for suction is more unstable, and it is easy for the needle to fall out of the tympanic cavity, causing an injury. It is impossible to push down, but the piston reverses the suction. Secondly, at present, the syringe needle, needle and needle cap are assembled by plugging and pulling. Although the assembly is relatively convenient, the needle and needle cap are easy to fall off. Therefore, a reverse syringe for treating tympanic cavity effusion is proposed to solve the above problems. Utility Model Content
[0004] In order to make up for the above shortcomings, the utility model provides a reverse syringe for treating tympanic effusion, aiming to improve the problem in the prior art that reverse injection is impossible and the needle cap is easy to fall off.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a reverse syringe for treating tympanic effusion, comprising a needle tube, a needle tip is detachably connected to the top end of the needle tube, a rotating shaft is fixedly connected to the inner wall of the needle tube, a gear is fixedly connected to the outer wall of the rotating shaft, a rectangular bracket a is meshed with the right outer wall of the gear, a pressing block is fixedly connected to the bottom end of the rectangular bracket a, a guide rod a is slidably connected to the inner wall of the rectangular bracket a, a piston is fixedly connected to the top end of the guide rod a, a rectangular bracket b is meshed with the left outer wall of the gear, and a guide rod b is slidably connected to the inner wall of the rectangular bracket b.
[0006] As a further description of the above technical solution:
[0007] The top end of the needle tube is provided with a groove, the inner wall of the needle tube is elastically connected to a limiting bead through a return spring, and the outer wall of the needle head is provided with a limiting groove.
[0008] As a further description of the above technical solution:
[0009] The outer wall of the rectangular bracket a is slidably connected to the inner wall of the needle tube, and the outer wall of the rectangular bracket b is slidably connected to the inner wall of the needle tube.
[0010] As a further description of the above technical solution:
[0011] The top end of the rectangular bracket b is fixedly connected to the bottom end of the piston.
[0012] As a further description of the above technical solution:
[0013] The bottom end of the guide rod b is fixedly connected to the inner wall of the needle tube.
[0014] As a further description of the above technical solution:
[0015] The outer wall of the needle is plugged into the inner wall of the groove.
[0016] As a further description of the above technical solution:
[0017] One end of the return spring is fixedly connected to the inner wall of the needle tube, and the other end of the return spring is fixedly connected to the back side of the limiting bead.
[0018] As a further description of the above technical solution:
[0019] The outer wall of the limiting bead is clamped with the inner wall of the limiting groove.
[0020] The utility model has the following beneficial effects:
[0021] 1. In the utility model, by setting gears, rectangular bracket a, and rectangular bracket b, when extracting the accumulated liquid, the pressing block is pushed to make the rectangular bracket a move inward to drive the gear to rotate, so that the rectangular bracket b drives the piston to move outward to extract the accumulated liquid. When pushing, the piston can be moved outward to extract the accumulated liquid, and the extraction process is safe and stable.
[0022] 2. In the utility model, by providing a limiting bead, when the needle is installed on the needle tube, the needle is aligned with the groove and inserted. When the needle is fully inserted, the limiting bead will be stuck in the limiting groove, so that the needle can be installed on the needle tube more stably. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is an overall front view schematic diagram of a reverse syringe for treating tympanic effusion proposed by the utility model;
[0024] Figure 2 A schematic cross-sectional view of a needle tube of a reverse syringe for treating tympanic effusion proposed by the utility model;
[0025] Figure 3 A reverse syringe for treating tympanic effusion proposed by the utility model Figure 2 A is an enlarged schematic diagram.
[0026] Legend:
[0027] 1. Needle tube; 2. Needle; 3. Rotating shaft; 4. Gear; 5. Rectangular bracket a; 6. Pressing block; 7. Rectangular bracket b; 8. Piston; 9. Guide rod a; 10. Guide rod b; 11. Groove; 12. Reset spring; 13. Limiting bead; 14. Limiting groove. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] Reference Figure 1-Figure 2 The utility model provides an embodiment: a reverse syringe for treating tympanic effusion, comprising a needle tube 1, a needle 2 detachably connected to the top of the needle tube 1, a rotating shaft 3 fixedly connected to the inner wall of the needle tube 1, a gear 4 fixedly connected to the outer wall of the rotating shaft 3, a rectangular bracket a5 meshed with the outer wall on the right side of the gear 4, the inner side of the rectangular bracket a5 is serrated and meshed with the surface of the gear 4, and when the rectangular bracket a5 moves, it drives the gear 4 to rotate, a pressing block 6 fixedly connected to the bottom end of the rectangular bracket a5, squeezing the pressing block 6 can push the rectangular bracket a5 to move toward the inside of the needle tube 1, the outer wall of the rectangular bracket a5 is slidably connected to the inner wall of the needle tube 1, the inner wall of the rectangular bracket a5 is slidably connected to a guide rod a9, and the top of the guide rod a9 It is fixedly connected with a piston 8. When the rectangular bracket a5 is squeezed inward, its inner wall slides along the guide rod a9 without deviation. A rectangular bracket b7 is meshed with the outer wall on the left side of the gear 4. The top end of the rectangular bracket b7 is fixedly connected with the bottom end of the piston 8. When the rectangular bracket a5 moves toward the inside of the needle tube 1, the gear 4 rotates to make the rectangular bracket b7 drive the piston 8 to move toward the outside of the needle tube 1, so that the air pressure in the needle tube 1 changes to draw out the accumulated fluid and realize reverse injection. The outer wall of the rectangular bracket b7 is slidably connected with the inner wall of the needle tube 1. The inner wall of the rectangular bracket b7 is slidably connected with a guide rod b10. The bottom end of the guide rod b10 is fixedly connected with the inner wall of the needle tube 1. The rectangular bracket b7 slides along the outer wall of the guide rod b10 to prevent deviation.
[0030] Reference Figure 1-Figure 3When the needle 2 is inserted into the bottom of the groove 11, the limiting bead 13 is snapped into the limiting groove 14 under the action of the reset spring 12, further fixing the needle 2 on the needle tube 1, making the connection more stable.
[0031] Working principle: When extracting the fluid accumulated in the tympanic cavity, push the pressing block 6 inward to make the rectangular bracket a5 move along the guide rod a9 toward the inside of the needle tube 1, so that the gear 4 rotates, driving the rectangular bracket b7 to move along the guide rod b10 toward the outside of the needle tube 1, and driving the piston 8 to move outward together, so that the air pressure inside the needle tube 1 changes to extract the accumulated fluid, and the accumulated fluid is extracted while pushing downward, so that the tympanic cavity accumulation can be completed simply and safely under the direct vision of the ear endoscope. When installing the needle 2, align the needle 2 with the groove 11 and insert it. During the insertion process of the needle 2, its outer wall squeezes the surface of the limiting bead 13 to squeeze the reset spring 12 to retract it. After the needle 2 is fully inserted into the groove 11, the reset spring 12 pushes the limiting bead 13 into the limiting groove 14, making the installation of the needle 2 more stable and not easy to fall off.
[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A reverse syringe for treating tympanic effusion, comprising a needle tube (1), characterized in that: The top end of the needle tube (1) is detachably connected to a needle head (2); the inner wall of the needle tube (1) is fixedly connected to a rotating shaft (3); the outer wall of the rotating shaft (3) is fixedly connected to a gear (4); the right outer wall of the gear (4) is meshed with a rectangular bracket a (5); the bottom end of the rectangular bracket a (5) is fixedly connected to a pressing block (6); the inner wall of the rectangular bracket a (5) is slidably connected to a guide rod a (9); the top end of the guide rod a (9) is fixedly connected to a piston (8); the left outer wall of the gear (4) is meshed with a rectangular bracket b (7); the inner wall of the rectangular bracket b (7) is slidably connected to a guide rod b (10).
2. A reverse syringe for treating tympanic effusion according to claim 1, characterized in that: The top end of the needle tube (1) is provided with a groove (11), the inner wall of the needle tube (1) is elastically connected to a limiting bead (13) via a return spring (12), and the outer wall of the needle head (2) is provided with a limiting groove (14).
3. A reverse syringe for treating tympanic effusion according to claim 1, characterized in that: The outer wall of the rectangular bracket a (5) is slidably connected to the inner wall of the needle tube (1), and the outer wall of the rectangular bracket b (7) is slidably connected to the inner wall of the needle tube (1).
4. A reverse syringe for treating tympanic effusion according to claim 1, characterized in that: The top end of the rectangular bracket b (7) is fixedly connected to the bottom end of the piston (8).
5. A reverse syringe for treating tympanic effusion according to claim 1, characterized in that: The bottom end of the guide rod b (10) is fixedly connected to the inner wall of the needle tube (1).
6. A reverse syringe for treating tympanic effusion according to claim 2, characterized in that: The outer wall of the needle (2) is plugged into the inner wall of the groove (11).
7. A reverse syringe for treating tympanic effusion according to claim 2, characterized in that: One end of the return spring (12) is fixedly connected to the inner wall of the needle tube (1), and the other end of the return spring (12) is fixedly connected to the back side of the limiting bead (13).
8. A reverse syringe for treating tympanic effusion according to claim 2, characterized in that: The outer wall of the limiting bead (13) is clamped with the inner wall of the limiting groove (14).