Anti-backflow venous indwelling needle

Abstract

The utility model discloses an anti-backflow venous indwelling needle, and relates to the technical field of hygiene. An anti-backflow venous indwelling needle comprises a catheter seat, a catheter seat extension wall and an extension tube, the catheter seat extension wall is fixedly connected to the catheter seat, one end of the extension tube is fixedly connected with the catheter seat extension wall, and a tube clamp limiting structure is located on the extension tube. The pipe clamp limiting structure comprises a pipe sealing clamp, a first extrusion protruding block, a second extrusion protruding block, a third extrusion protruding block, a connecting plate and a rubber sliding block, and through cooperation of the first extrusion protruding block, the second extrusion protruding block, the third extrusion protruding block, the connecting plate and the rubber sliding block, the first extrusion protruding block can extrude an extension pipe into the pipe sealing clamp in a W shape; and therefore, the connecting plate can be conveniently rotated, the end, away from the third extrusion protruding block, of the connecting plate is attached to the side, close to the first extrusion protruding block, of the pipe sealing clamp, the connecting plate can prevent the pipe sealing clamp from being opened due to errors, and the clamping and closing effect of the pipe sealing clamp is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hygiene, in particular to an anti-reflux venous indwelling needle. Background Art

[0002] In clinical medicine, when the elderly or children need long-term infusion or long-term intravenous injection of nutrients, intravenous catheters are often used due to the difficulty of puncture and the frequent punctures. The use of intravenous catheters can reduce the number of punctures and the pain during puncture, so they are widely used in clinical practice.

[0003] Traditional tube sealing clamps are mostly fixed to the extension tube through a simple clamping structure. When the patient moves or accidentally touches the tube, the tube sealing clamp is prone to loosening, resulting in reduced clamping effect and increased risk of blood reflux. Therefore, we propose an anti-reflux intravenous catheter. Utility Model Content

[0004] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art and to provide an anti-reflux venous catheter, which can solve the problem that traditional tube sealing clamps are mostly fixed on the extension tube by a simple clamping structure. When the patient moves or touches it inadvertently, the tube sealing clamp is easily loosened, resulting in reduced clamping effect and increased risk of blood reflux.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-reflux venous indwelling needle, comprising:

[0006] A catheter seat, a catheter seat extension wall and an extension tube, wherein the catheter seat extension wall is fixedly connected to the catheter seat, and one end of the extension tube is fixedly connected to the catheter seat extension wall;

[0007] The pipe clamp limiting structure is located on the extension pipe;

[0008] The tube clamp limiting structure includes a tube sealing clamp, a first extrusion protrusion, a second extrusion protrusion, a third extrusion protrusion, a connecting plate and a rubber sliding block. The tube sealing clamp is installed on the extension tube. The first extrusion protrusion, the second extrusion protrusion and the third extrusion protrusion are all fixedly connected to the inside of the tube sealing clamp. A sliding groove is provided inside the third extrusion protrusion. The connecting plate is slidably connected to the inside of the third extrusion protrusion. The end of the connecting plate away from the third extrusion protrusion is slidably connected to the inside of the second extrusion protrusion. The rubber sliding block is fixedly connected to the bottom end of the connecting plate. The rubber sliding block is slidably connected to the inside of the sliding groove.

[0009] Preferably, one end of the catheter seat is fixedly connected to the catheter, and the end of the catheter seat away from the catheter is fixedly connected to the needle seat.

[0010] Preferably, a needle tip protection sleeve is fixedly sleeved on the outer surface of the catheter seat.

[0011] Preferably, a needle wing is fixedly connected to the needle seat.

[0012] Preferably, one end of the extension tube away from the extension wall of the catheter seat is fixedly connected to a sealed infusion connector, and an end cap is fixedly connected to the sealed infusion connector.

[0013] Preferably, the tube sealing clamp is made of elastic plastic material.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The anti-reflux venous indwelling needle, through the cooperation of the first squeezing protrusion, the second squeezing protrusion, the third squeezing protrusion, the connecting plate and the rubber sliding block, enables the first squeezing protrusion to squeeze the extension tube into a "W" shape in the tube sealing clamp, thereby facilitating the rotation of the connecting plate so that the end of the connecting plate away from the third squeezing protrusion is in contact with the side of the tube sealing clamp close to the first squeezing protrusion, so that the connecting plate can prevent the tube sealing clamp from opening due to error, thereby improving the clamping effect of the tube sealing clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the pipe sealing clamp structure of the present utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the tube sealing clamp of the present utility model.

[0020] Figure numerals: 1. catheter seat; 2. catheter; 3. catheter seat extension wall; 4. needle wing; 5. needle seat; 6. needle tip protection sleeve; 7. extension tube; 8. tube sealing clamp; 9. sealed infusion connector; 10. end cap; 11. first extrusion protrusion; 12. second extrusion protrusion; 13. connecting plate; 14. third extrusion protrusion; 15. rubber sliding block; 16. sliding groove. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0023] In the description of this utility model, terms such as "greater than," "less than," and "exceed" are understood to exclude the number indicated, while terms such as "above," "below," and "within" are understood to include the number indicated. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] See also Figure 1-3 The utility model provides a technical solution: an anti-reflux venous indwelling needle, comprising:

[0026] The catheter seat 1, the catheter seat extension wall 3 and the extension tube 7, the catheter seat extension wall 3 is fixedly connected to the catheter seat 1, and one end of the extension tube 7 is fixedly connected to the catheter seat extension wall 3;

[0027] The pipe clamp limiting structure is located on the extension pipe 7;

[0028] The tube clamp limiting structure includes a tube sealing clamp 8, a first extrusion protrusion 11, a second extrusion protrusion 12, a third extrusion protrusion 14, a connecting plate 13 and a rubber sliding block 15. The tube sealing clamp 8 is installed on the extension tube 7. The first extrusion protrusion 11, the second extrusion protrusion 12 and the third extrusion protrusion 14 are all fixedly connected to the inside of the tube sealing clamp 8. A sliding groove 16 is provided inside the third extrusion protrusion 14. The connecting plate 13 is slidably connected to the inside of the third extrusion protrusion 14. The end of the connecting plate 13 away from the third extrusion protrusion 14 is slidably connected to the inside of the second extrusion protrusion 12. The rubber sliding block 15 is fixedly connected to the bottom end of the connecting plate 13. The rubber sliding block 15 is slidably connected to the inside of the sliding groove 16. The tube sealing clamp 8 is made of elastic plastic material.

[0029] One end of the catheter seat 1 is fixedly connected to the catheter 2, and the end of the catheter seat 1 away from the catheter 2 is fixedly connected to the needle seat 5. The outer surface of the catheter seat 1 is fixedly covered with a needle tip protection sleeve 6, and the needle seat 5 is fixedly connected to a needle wing 4.

[0030] One end of the extension tube 7 away from the catheter seat extension wall 3 is fixedly connected to a sealed infusion connector 9 , and an end cap 10 is fixedly connected to the sealed infusion connector 9 .

[0031] Furthermore, when using the device, the medical staff engages the tube sealing clamp 8 so that the first squeezing protrusion 11 can be located between the second squeezing protrusion 12 and the third squeezing protrusion 14, thereby facilitating the extension tube 7 to be squeezed into the tube sealing clamp 8 in a "W" shape. Subsequently, the medical staff pulls the connecting plate 13, and the connecting plate 13 drives the rubber sliding block 15 to slide in the sliding groove 16, thereby facilitating the pulling out of the connecting plate 13 from the second squeezing protrusion 12, thereby facilitating the rotation of the connecting plate 13, so that the end of the connecting plate 13 away from the third squeezing protrusion 14 is in contact with the side of the tube sealing clamp 8 close to the first squeezing protrusion 11, so that the connecting plate 13 can prevent the tube sealing clamp 8 from opening due to error, thereby resetting the connecting plate 13. Under the sliding connection between the rubber sliding block 15 and the sliding groove 16, the rubber sliding block 15 has resistance, and thus will not be easily displaced.

[0032] Through the cooperation of the first squeezing protrusion 11, the second squeezing protrusion 12, the third squeezing protrusion 14, the connecting plate 13 and the rubber sliding block 15, the first squeezing protrusion 11 can squeeze the extension tube 7 into a "W" shape in the tube sealing clamp 8, thereby facilitating the rotation of the connecting plate 13 so that the end of the connecting plate 13 away from the third squeezing protrusion 14 is in contact with the side of the tube sealing clamp 8 close to the first squeezing protrusion 11, so that the connecting plate 13 can prevent the tube sealing clamp 8 from opening due to error, thereby improving the clamping effect of the tube sealing clamp 8.

[0033] Working principle: The medical staff engages the tube sealing clamp 8 so that the first squeezing protrusion 11 can be located between the second squeezing protrusion 12 and the third squeezing protrusion 14, thereby facilitating the extension tube 7 to be squeezed into the tube sealing clamp 8 in a "W" shape. Subsequently, the medical staff pulls the connecting plate 13, and the connecting plate 13 drives the rubber sliding block 15 to slide in the sliding groove 16, thereby facilitating the pulling of the connecting plate 13 out of the second squeezing protrusion 12, thereby facilitating the rotation of the connecting plate 13, so that the end of the connecting plate 13 away from the third squeezing protrusion 14 is in contact with the side of the tube sealing clamp 8 close to the first squeezing protrusion 11, so that the connecting plate 13 can prevent the tube sealing clamp 8 from opening due to error, thereby resetting the connecting plate 13. Under the sliding connection between the rubber sliding block 15 and the sliding groove 16, the rubber sliding block 15 has resistance, and thus will not be easily displaced.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A reflux prevention intravenous indwelling needle, characterized in that: include: A catheter seat (1), a catheter seat extension wall (3) and an extension tube (7), wherein the catheter seat extension wall (3) is fixedly connected to the catheter seat (1), and one end of the extension tube (7) is fixedly connected to the catheter seat extension wall (3); A pipe clamp limiting structure, the pipe clamp limiting structure is located on the extension pipe (7); The tube clamp limiting structure comprises a tube sealing clamp (8), a first extrusion protrusion (11), a second extrusion protrusion (12), a third extrusion protrusion (14), a connecting plate (13) and a rubber sliding block (15); the tube sealing clamp (8) is mounted on the extension tube (7); the first extrusion protrusion (11), the second extrusion protrusion (12) and the third extrusion protrusion (14) are all fixedly connected to the interior of the tube sealing clamp (8); The third extrusion protrusion (14) is provided with a sliding groove (16), the connecting plate (13) is slidably connected to the inside of the third extrusion protrusion (14), and the end of the connecting plate (13) away from the third extrusion protrusion (14) is slidably connected to the inside of the second extrusion protrusion (12); The rubber sliding block (15) is fixedly connected to the bottom end of the connecting plate (13), and the rubber sliding block (15) is slidably connected to the inside of the sliding groove (16).

2. The anti-reflux venous indwelling needle according to claim 1, characterized in that: One end of the catheter seat (1) is fixedly connected to the catheter (2), and the end of the catheter seat (1) away from the catheter (2) is fixedly connected to the needle seat (5).

3. The anti-reflux venous indwelling needle according to claim 1, characterized in that: A needle tip protective sleeve (6) is fixedly sleeved on the outer surface of the catheter seat (1).

4. The anti-reflux venous indwelling needle according to claim 2, characterized in that: The needle seat (5) is fixedly connected with a needle wing (4).

5. The anti-reflux venous indwelling needle according to claim 1, characterized in that: One end of the extension tube (7) away from the catheter seat extension wall (3) is fixedly connected to a sealed infusion connector (9), and an end cap (10) is fixedly connected to the sealed infusion connector (9).

6. The anti-reflux venous indwelling needle according to claim 1, characterized in that: The tube sealing clamp (8) is made of elastic plastic material.

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