Disposable oral irrigator

Abstract

The application relates to a disposable oral cavity flusher, which relates to the technical field of oral cavity medical devices and comprises an outer cylinder, a piston arranged in a containing cavity of the outer cylinder and capable of sliding up and down, a connecting hole arranged in the piston, at least one annular groove arranged in the connecting hole, a lower end thin wall arranged between the hole bottom of the connecting hole and the lower surface of the piston, a push rod connected with the piston, the lower end of the push rod being provided with an end structure coupled with the connecting hole, the end structure being provided with a protrusion matched with the annular groove, the outer diameter of the protrusion being matched with the inner diameter of a terminal cavity, the lower end of the end structure being provided with a sharp part with a sharp end directed to the lower end thin wall, the push rod being used for pushing the piston to move downwards, when the piston abuts against the bottom surface of the containing cavity, the sharp part of the push rod can pierce the lower end thin wall to enter the terminal cavity to discharge the flush liquid in the terminal cavity, and the residual amount of the flush liquid in the flusher can be reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of oral irrigation devices, specifically to a disposable oral irrigator. Background Technology

[0002] Disposable oral irrigators are used in clinical dental treatment for root canal irrigation and treatment. However, existing oral irrigators often have residual irrigating fluid at the lower end of the outer cylinder, which cannot be discharged due to the limitations of the irrigator's structure, resulting in waste. In clinical dental treatment, these disposable oral irrigators are used in large quantities, and the accumulated waste of irrigating fluid is considerable. The disposal of irrigating fluid also has an adverse impact on the environment.

[0003] It is of practical significance to find ways to reduce or even eliminate the amount of residual flushing fluid in the flushing device. Utility Model Content

[0004] This invention addresses the aforementioned technical problems in the prior art by providing a disposable oral irrigator that can reduce or even eliminate the amount of residual irrigating fluid in the irrigator.

[0005] To achieve the above technical objectives, this utility model provides a disposable oral irrigator, comprising: An outer cylinder has a receiving cavity for containing flushing fluid, and a discharge port is provided at the lower end of the outer cylinder. An end cavity with a diameter smaller than that of the receiving cavity is formed between the receiving cavity and the discharge port. A piston is disposed in the receiving cavity and can slide up and down. The piston has a connecting hole inside, and the connecting hole has at least one annular groove. A thin wall is provided at the bottom of the connecting hole and the lower surface of the piston. A push rod connected to the piston at its lower end has an end structure coupled to the connecting hole at its lower end. The end structure has a protrusion adapted to the annular groove. The outer diameter of the protrusion is adapted to the inner diameter of the end cavity. The lower end of the end structure has a spike with its tip pointing towards the lower thin wall. The push rod is used to push the piston downward, and when the piston abuts against the bottom surface of the receiving cavity, the spike of the push rod can pierce the lower thin wall and enter the end cavity to discharge the flushing fluid in the end cavity.

[0006] Furthermore, there are two annular grooves, namely a first annular groove and a second annular groove; There are two protrusions, namely a first protrusion and a second protrusion; The first protrusion engages with the first annular groove; The second protrusion engages with the second annular groove.

[0007] Furthermore, the thickness of the lower thin wall is 1mm to 3mm.

[0008] Furthermore, the thickness of the lower thin wall is 2 mm.

[0009] Furthermore, it also includes a needle, the needle comprising a needle hub and a needle body connected to the needle hub; The needle hub is coupled to the connecting part located at the lower end of the outer cylinder.

[0010] Furthermore, the piston is made of rubber.

[0011] Furthermore, the upper end of the push rod has an operating part located outside the receiving cavity.

[0012] One or more technical solutions provided in this utility model embodiment have at least the following technical effects or advantages: In this utility model, the push rod is used to push the piston down, and when the piston abuts against the bottom surface of the receiving cavity, the spike of the push rod can pierce the thin wall at the lower end and enter the end cavity to discharge the flushing fluid in the end cavity, which can reduce or even eliminate the residual amount of flushing fluid in the flusher. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a disposable oral irrigator according to an embodiment of the present invention.

[0014] Figure 2 for Figure 1 The main view.

[0015] Figure 3 for Figure 1 A sectional view.

[0016] Figure 4 for Figure 3 A magnified view of point A in the image.

[0017] Figure 5 This is a schematic diagram showing the spike piercing the thin wall at the lower end of the piston and entering the end cavity.

[0018] Figure 6 This is a schematic diagram of the cross-sectional structure of the piston.

[0019] Figure 7 This is a schematic diagram of the end structure of the push rod.

[0020] Explanation of reference numerals in the attached figures 1. Outer cylinder; 11. Receiving cavity; 12. Connecting part; 121. End cavity; 13. Discharge port; 2. Push rod; 21. Rod body; 22. First protrusion; 23. Second protrusion; 24. Spike part; 25. End structure; 26. Operating part; 3. Needle; 31. Needle seat; 32. Needle body; 4. Piston; 40. Connecting hole; 41. First annular groove; 42. Second annular groove; 43. Lower end thin wall. Detailed Implementation

[0021] Other objects and advantages of this utility model will become clear by explaining the preferred embodiments of the present application below.

[0022] like Figures 1 to 7 As shown, the disposable oral irrigator includes an outer cylinder 1, a piston 4, and a push rod 2. Among them, The outer cylinder 1 has a receiving cavity 11 for containing rinsing fluid, and the lower end of the outer cylinder 1 has a discharge port 13. An end cavity 121 with a diameter smaller than that of the receiving cavity 11 is formed between the receiving cavity 11 and the discharge port 13.

[0023] In some embodiments, the device further includes a needle 3, which includes a needle seat 31 and a needle body 32 connected to the needle seat 31; the needle seat 31 is coupled to a connecting portion 12 located at the lower end of the outer cylinder 1. The aforementioned end cavity 121 is typically formed within the connecting portion 12 at the lower end of the outer cylinder 1, and the connecting portion 12 is used to connect to the needle 3.

[0024] Piston 4 is disposed in the receiving cavity 11 and can slide up and down. For example... Figure 6 As shown, the piston 4 has a connecting hole 40 inside. The connecting hole 40 is recessed inward from the upper surface of the piston 4 and does not penetrate the piston 4, thereby forming a thin lower wall 43 between the bottom of the connecting hole 40 and the lower surface of the piston 4. The connecting hole 40 has at least one annular groove, and the inner diameter of the annular groove is larger than the inner diameter of the connecting hole 40.

[0025] The push rod 2 includes a rod body 21, the lower end of which is connected to the piston 4, and the upper end of the rod body 21 has an operating part 26 located outside the receiving cavity 11. The piston 4 can be pushed or pulled up and down through this operating part 26.

[0026] The lower end of the push rod 2 has an end structure 25 coupled to the connecting hole 40, and the end structure 25 has a protrusion adapted to the annular groove. When the piston 4 moves up and down, the connecting force between the end structure 25 and the connecting hole 40 is sufficient to push the piston 4 to move.

[0027] In some embodiments, there are two annular grooves, which improve the reliability of the connection between the end structure 25 and the piston 4. These are a first annular groove 41 and a second annular groove 42, respectively. There are also two protrusions, namely a first protrusion 22 and a second protrusion 23. The first protrusion 22 is engaged with the first annular groove 41, and the second protrusion 23 is engaged with the second annular groove 42.

[0028] Figure 4 for Figure 3 The image shows a magnified view of point A. It illustrates the piston's downward movement process; while Figure 5 This is a schematic diagram showing the spike piercing the lower thin wall 43 of the piston and entering the end cavity 121.

[0029] The lower end of the end structure 25 has a spike 24 with its tip pointing towards the lower thin wall 43. The push rod 2 is used to push the piston 4 downward, and when the piston 4 abuts against the bottom surface of the receiving cavity 11, the spike 24 of the push rod 2 can pierce the lower thin wall 43 and enter the end cavity 121 to discharge the flushing fluid in the end cavity 121. In this invention, the outer diameter of the protrusion is adapted to the inner diameter of the end cavity 121. When the protrusion is connected to the end cavity 121, the protrusion can act like a piston, pushing the flushing fluid in the end cavity 121 to be discharged. Setting two protrusions, namely the first protrusion 22 and the second protrusion 23, can also improve the sealing between the protrusion and the inner surface of the end cavity 121.

[0030] In some embodiments, the piston 4 is made of rubber. In some embodiments, the thickness of the lower thin wall 43 is 1mm to 3mm. Preferably, the thickness of the lower thin wall 43 is 2mm. If the lower thin wall 43 is too thin, its strength is insufficient, and it is easily punctured by the spike 24, causing leakage of flushing fluid. If it is too thick, the difficulty of puncture increases.

[0031] The preferred technical solution of this application has been described in detail with reference to the disposable oral irrigator. However, it should be noted that, without departing from the spirit of this application, those skilled in the art can make any modifications, alterations, and variations based on the above disclosure. This application includes the above-described specific embodiments and any equivalent forms.

Claims

1. A disposable oral irrigator, characterized in that, include: The outer cylinder (1) has a receiving cavity (11) for containing rinsing fluid. The lower end of the outer cylinder (1) has a discharge port (13). An end cavity (121) with a diameter smaller than that of the receiving cavity (11) is formed between the receiving cavity (11) and the discharge port (13). A piston (4) is disposed in the receiving cavity (11) and can slide up and down. The piston (4) has a connecting hole (40) inside, and the connecting hole (40) has at least one annular groove. A thin lower wall (43) is provided between the bottom of the connecting hole (40) and the lower surface of the piston (4). A push rod (2) is connected to the piston (4) at its lower end. The lower end of the push rod (2) has an end structure (25) coupled to the connecting hole (40). The end structure (25) has a protrusion adapted to the annular groove. The outer diameter of the protrusion is adapted to the inner diameter of the end cavity (121). The lower end of the end structure (25) has a spike (24) with its tip facing the lower thin wall (43). The push rod (2) is used to push the piston (4) down. When the piston (4) abuts against the bottom surface of the receiving cavity (11), the spike (24) of the push rod (2) can pierce the lower thin wall (43) and enter the end cavity (121) to discharge the flushing fluid in the end cavity (121).

2. The disposable oral irrigator as described in claim 1, characterized in that, There are two annular grooves, namely the first annular groove (41) and the second annular groove (42). There are two protrusions, namely the first protrusion (22) and the second protrusion (23); The first protrusion (22) fits into the first annular groove (41); The second protrusion (23) is engaged with the second annular groove (42).

3. The disposable oral irrigator as described in claim 1, characterized in that, The thickness of the lower thin wall (43) is 1mm to 3mm.

4. The disposable oral irrigator as described in claim 3, characterized in that, The thickness of the lower thin wall (43) is 2 mm.

5. The disposable oral irrigator as described in claim 1, characterized in that, It also includes a needle (3), which includes a needle seat (31) and a needle body (32) connected to the needle seat (31). The needle seat (31) is coupled to the connecting part (12) located at the lower end of the outer cylinder (1).

6. The disposable oral irrigator as described in claim 1, characterized in that, The piston (4) is made of rubber.

7. The disposable oral irrigator as described in claim 1, characterized in that, The upper end of the push rod (2) has an operating part (26) located outside the receiving cavity (11).

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