Water injection backflow prevention connecting structure for endoscope

Abstract

A water injection backflow prevention connecting structure for an endoscope relates to the technical field of medical instruments related to endoscopes and comprises a water-drop-shaped shell, a water-drop inner cavity is formed in the water-drop-shaped shell, a conical flow dividing part is fixedly arranged on the side wall of the water-drop inner cavity, a sliding rod is slidably connected in the conical flow dividing part, and the water-drop-shaped shell is provided with a water-drop-shaped opening. A water inlet is formed in the bottom of the water drop inner cavity, a sliding rod is arranged in the water drop inner cavity, the sliding rod penetrates through the conical flow dividing part from top to bottom, the lower end face of the sliding rod is fixedly connected with a backflow preventing plug, and the bottom of the backflow preventing plug abuts against the water inlet in the bottom of the water drop inner cavity. One part of the backflow preventing plug enters the middle of the conical part, falls into the upper end face of the spherical crown body and flows out of the middle of the spherical crown body to form hedging with liquid flowing in from the edge of the conical part, so that the flow speed can be effectively reduced, and the situation that the backflow preventing plug is opened due to the fact that the flow speed of backflow liquid is too high, and leakage is caused is avoided. The whole is very safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscope-related medical equipment, in particular to a water injection backflow prevention connection structure for an endoscope. Background Art

[0002] The medical endoscopes currently on the market have added a water injection function to facilitate gastrointestinal surgery and inspection. Therefore, when using it, it is necessary to first connect the medical endoscope to the water pump through the water supply connector so that subsequent work can proceed normally.

[0003] At present, we have found that during the use of the endoscope, the liquid in the patient's digestive tract can easily flow back through the water outlet of the endoscope under the action of pressure, causing contamination of the water supply device of the endoscope, which then needs to be disinfected and cleaned, which is very troublesome. Utility Model Content

[0004] The utility model aims to provide a water injection anti-backflow connection structure for an endoscope to solve the problems raised in the above-mentioned background technology.

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] A water injection anti-backflow connection structure for an endoscope comprises a water drop-shaped shell, a water drop inner cavity is arranged in the water drop-shaped shell, a conical diverter portion is fixedly arranged on the side wall of the water drop inner cavity, a sliding rod is slidably connected in the conical diverter portion, the sliding rod penetrates the conical diverter portion from top to bottom, an anti-backflow plug is fixedly connected to the lower end face of the sliding rod, the bottom of the anti-backflow plug abuts against the water inlet at the bottom of the water drop inner cavity, the sliding rod is provided with a convex disk portion in the hollow inner cavity part of the conical diverter portion, a reset spring is connected between the convex disk portion and the side wall of the hollow inner cavity of the conical diverter portion, an annular plate portion is fixedly arranged at the edge of the upper end face of the conical diverter portion, and the annular plate portion is inclined toward the center of the conical diverter portion.

[0007] Preferably, the upper end face of the sliding rod is fixedly connected with a spherical crown body, the outer ring edge of the spherical crown body abuts against the inner end face of the ring plate portion, the upper end face of the spherical crown body is concavely arranged, and a retaining ring portion is arranged at the edge of the lower end face of the spherical crown body.

[0008] Preferably, a conical portion is provided on the side wall of the water drop inner cavity on the upper side of the conical diversion portion, and a notch cavity is formed between the bottom end of the conical portion and the annular plate portion.

[0009] Preferably, the anti-backflow plug is semi-ellipsoidal in shape.

[0010] Preferably, a water outlet is connected to the top water outlet of the water drop inner cavity, and a water inlet is connected to the bottom water inlet of the water drop inner cavity.

[0011] The advantages and positive effects of the utility model are:

[0012] The utility model can divert water when injecting water, and when liquid reflux occurs in the patient's body, the conical part can be used for diversion first, and a part of it enters the middle of the conical part and falls into the upper end surface of the spherical crown body, which can not only exert a pressure on the slide bar to press the anti-reflux plug at the bottom, but also flow out from the concave middle of the spherical crown body to form a counter-attack with the liquid flowing in from the edge of the conical part, thereby effectively reducing the flow rate, avoiding the reflux liquid flow rate being too large, which will flush the anti-reflux plug and cause leakage. The utility model is very safe and reliable as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of a water injection anti-backflow connection structure for an endoscope according to the utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of the water injection anti-backflow connection structure for an endoscope from another perspective of the utility model;

[0016] Figure 3 The utility model is a schematic diagram of the main and sectional structure of a water injection anti-backflow connection structure for an endoscope.

[0017] The symbols in the drawings are described as follows: water drop-shaped shell 10; water drop inner cavity 11; cone portion 12; spherical crown 13; ring plate portion 14; conical diversion portion 15; notched cavity 16; sliding rod 17; convex disc portion 18; anti-backflow plug 19; water outlet pipe 2; water inlet pipe 3. DETAILED DESCRIPTION

[0018] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0019] Combine the following Figure 1-3 The utility model is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are the same as Figure 1 The view direction is consistent in front, back, left, right, up and down directions. Figure 1 The directions shown are consistent with the front, back, left, right, up and down directions of the device of the utility model when viewed from the front.

[0020] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of at least two elements or the interaction relationship between at least two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0022] See also Figure 1-3 The utility model provides an embodiment: a water injection anti-backflow connection structure for an endoscope, comprising a water drop-shaped shell 10, the bottom of the water drop-shaped shell 10 is used as a water inlet to connect the water inlet pipe 3, and the top is used as a water outlet to connect the water outlet pipe 2, a water drop inner cavity 11 is arranged in the water drop-shaped shell 10, a conical diversion portion 15 is fixedly arranged on the wider part of the side wall of the water drop inner cavity 11, and the conical diversion portion 15 is hollow inside, and a slide bar 17 is slid from top to bottom through the conical diversion portion 15 for connection and arrangement, and an anti-backflow plug 19 is fixedly connected to the lower end surface of the slide bar 17, The bottom of the anti-backflow plug 19 abuts against the water inlet at the bottom of the water drop inner cavity 11, the slide rod 17 is provided with a convex disc portion 18 in the hollow inner cavity portion of the conical diverter 15, a return spring is connected between the convex disc portion 18 and the hollow inner cavity side wall of the conical diverter 15, and the upper end surface of the conical diverter 15 is fixedly provided with an annular plate portion 14 at the edge, and the annular plate portion 14 is inclined toward the center of the conical diverter 15, so that the water flow cavity formed between the conical diverter 15, the annular plate portion 14 and the side wall of the water drop inner cavity 11 faces the water outlet;

[0023] When water flows into the inner cavity of the water droplet cavity 11 through the water inlet pipe 3, the water flow pushes open the anti-backflow plug 19, enters the water flow cavity formed on the side upward to the water outlet at the top, and is discharged through the water outlet pipe 2 to fill the endoscope with water, diffusing the water flow to form a trumpet-shaped expansion. After the water injection is stopped, the anti-backflow plug 19 at the bottom will block the water inlet at the bottom. Once the liquid in the patient's digestive tract flows back through the water outlet of the endoscope under the action of pressure and enters the inner cavity of the water droplet cavity 11 through the water outlet pipe 2, the liquid also needs to pass through the water flow cavity formed between the conical diversion portion 15, the annular plate portion 14 and the side wall of the water droplet cavity 11, and is blocked by the anti-backflow plug 19 and does not flow back into the water delivery device.

[0024] It is worth mentioning that in order to further improve the anti-backflow effect, in this embodiment, the upper end surface of the sliding rod 17 is fixedly connected with a spherical crown 13, the outer edge of the spherical crown 13 is in contact with the inner end surface of the ring plate portion 14, the upper end surface of the spherical crown 13 is concave, and a retaining edge ring portion is provided at the edge of the lower end surface of the spherical crown 13. At the same time, a conical portion 12 is provided on the side wall of the water drop inner cavity 11 on the upper side of the conical diversion portion 15, and a notch 16 is formed between the bottom end of the conical portion 12 and the ring plate portion 14;

[0025] In this way, when backflow occurs, the backflowing liquid will first be diverted through the conical portion 12, and a part of it will enter the middle of the conical portion 12 and fall into the upper end surface of the spherical crown 13, which will not only exert a pressure on the slide rod 17 to press the anti-backflow plug 19 at the bottom, but also flow out from the concave middle of the spherical crown 13 to form a counter-flow with the liquid flowing in from the edge of the conical portion 12, thereby effectively reducing the flow rate and preventing the backflow liquid from flowing too fast and flushing the anti-backflow plug 19, resulting in leakage.

[0026] In addition, in one embodiment, the anti-backflow plug 19 is configured to be semi-ellipsoidal, so that the flow can be better diverted during water refilling.

[0027] In a specific implementation, when water is injected, when water flows into the inner cavity of the water droplet cavity 11 through the water inlet pipe 3, the water pushes open the anti-backflow plug 19, and at the same time, the spherical crown 13 moves upward and abuts against the lower end surface of the conical portion 12, so that the gap 16 is blocked by the retaining edge ring portion, so that when water is injected, the water flows from the water flow cavity formed between the conical diversion portion 15, the annular plate portion 14 and the side wall of the water droplet cavity 11, and is guided to the water outlet pipe 2 to be discharged for endoscope injection. After the water injection is stopped, the anti-backflow plug 19 at the bottom will block the water inlet at the bottom. Once the liquid in the patient's digestive tract is Under the action of pressure, backflow occurs through the water outlet of the endoscope and enters the inner cavity of the water droplet cavity 11 through the outlet pipe 2. The refluxed liquid will first be diverted through the conical portion 12, and a part of it will enter the middle of the conical portion 12 and fall into the upper end surface of the spherical crown 13, which can not only exert a pressure on the slide rod 17 to press the anti-backflow plug 19 at the bottom, but also flow out from the concave middle of the spherical crown 13, forming a counter-flow with the liquid flowing in from the edge of the conical portion 12, thereby effectively reducing the flow rate and avoiding the reflux liquid from flowing too fast, which will flush the anti-backflow plug 19 and cause leakage. The whole is very safe and reliable.

[0028] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A water injection anti-backflow connection structure for an endoscope, comprising a water drop-shaped housing (10), characterized in that: The water droplet-shaped housing (10) is provided with a water droplet inner cavity (11), a conical diversion portion (15) is fixedly provided on the side wall of the water droplet inner cavity (11), a slide bar (17) is slidably connected in the conical diversion portion (15), the slide bar (17) penetrates the conical diversion portion (15) from top to bottom, a backflow prevention plug (19) is fixedly connected to the lower end surface of the slide bar (17), and the bottom of the backflow prevention plug (19) abuts against the water droplet inner cavity (11). At the water inlet at the bottom of the cavity (11), the sliding rod (17) is provided with a convex disc portion (18) in the hollow inner cavity portion of the conical diverter portion (15), a return spring is connected between the convex disc portion (18) and the side wall of the hollow inner cavity of the conical diverter portion (15), and an annular plate portion (14) is fixedly provided at the edge of the upper end surface of the conical diverter portion (15), and the annular plate portion (14) is inclined toward the center of the conical diverter portion (15).

2. The water injection anti-backflow connection structure for endoscope according to claim 1, characterized in that: The upper end surface of the sliding rod (17) is fixedly connected to a spherical crown body (13), the outer ring edge of the spherical crown body (13) abuts against the inner end surface of the ring plate portion (14), the upper end surface of the spherical crown body (13) is concave, and a retaining ring portion is provided at the edge of the lower end surface of the spherical crown body (13).

3. The water injection anti-backflow connection structure for endoscope according to claim 2, characterized in that: A conical portion (12) is provided on the side wall of the water drop inner cavity (11) above the conical diversion portion (15), and a notch cavity (16) is formed between the bottom end of the conical portion (12) and the annular plate portion (14).

4. The water injection anti-backflow connection structure for endoscope according to claim 1, characterized in that: The anti-backflow plug (19) is in a semi-ellipsoidal shape.

5. The water injection anti-backflow connection structure for endoscope according to claim 1, characterized in that: The water outlet at the top of the water drop inner cavity (11) is connected to a water outlet pipe (2), and the water inlet at the bottom of the water drop inner cavity (11) is connected to a water inlet pipe (3).

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