A needle puncture protection structure for an infusion needle

Abstract

The present invention relates to the technical field of medical devices, and in particular to an anti-needle puncture protection structure for an infusion needle, comprising an infusion needle assembly, a base and a blocking member, wherein the infusion needle assembly comprises a needle body and a slider fixed to the needle body, the base comprises a chassis and a column fixed to the chassis by clamping, a slideway extending longitudinally and for sliding the slider is formed inside the column, a first needle hole is formed in the chassis, when the needle tip of the needle body passes downward through the first needle hole, it is in an infusion state, and when the needle tip of the needle body is located in the first needle hole, it is in a protection state; the blocking member is arranged on an extension track of the slideway, and has an elastic deformation groove that only allows the upward slider to pass through and prevents the slider from moving downward; the present invention uses the elastic deformation groove that only allows the upward slider to pass through and prevents the slider from moving downward to confine the needle tip within the first needle hole after the infusion is completed, thereby forming an anti-needle puncture protection structure, and effectively avoiding damage caused by the exposure of the needle tip.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an anti-needle puncture protection structure for an infusion needle. Background Art

[0002] In the treatment of most diseases, infusion is usually required, and infusion requires an infusion needle. After the infusion is completed, the infusion needle needs to be pulled out of the patient's body. However, medical staff are often scratched by the needle when pulling out the needle, which will cause wounds and the risk of infectious diseases. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problem in the prior art that nurses are often scratched by the pulled-out needle when pulling out the needle, which causes wounds and the risk of infectious diseases, a needle-puncture protection structure for an infusion needle is provided.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: an anti-needle puncture protection structure for an infusion needle, comprising an infusion needle assembly, which comprises a needle body and a slider fixed to the needle body;

[0005] The base includes a chassis and a column fixedly connected to the chassis, wherein a slideway extending longitudinally and for the sliding block to slide is formed inside the column, and a first needle hole is opened on the chassis. When the needle tip of the needle body passes through the first needle hole downward, it is in an infusion state, and when the needle tip of the needle body is located in the first needle hole, it is in a protection state.

[0006] and a blocking member, which is arranged on the extension track of the slideway and has an elastic deformation groove that only allows the upward sliding block to pass through and prevents the sliding block from moving downward.

[0007] Furthermore, the blocking member is a spring sheet fixed on the top of the slideway, the elastic deformation groove is located at the center thereof, and a plurality of elastic notches connected to the elastic deformation groove and extending radially are formed on the groove wall thereof.

[0008] Furthermore, the elastic notch divides the spring sheet into a number of elastic claws distributed at intervals along the circumferential direction, each elastic claw includes a fixed end and a free end, and the elastic claw gradually bends upward from the fixed end to the free end, and the end faces of the several free ends are enclosed to form a blocking surface for blocking the slider from moving downward.

[0009] Furthermore, the slider includes a sliding portion slidably arranged inside the slideway and an extending portion extending out of the slideway, the extending portion is provided with a second needle hole for the needle body to pass through, the needle body passes through the second needle hole and the two are relatively fixed.

[0010] Furthermore, the sliding portion includes an upper limit portion located at the top, a lower limit portion located at the bottom, and a connecting portion for connecting the upper limit portion with the lower limit portion, the upper limit portion having a guiding surface for guiding it to pass through the elastic deformation groove, and after it passes through the elastic deformation groove, the spring sheet is clamped between the upper limit portion and the lower limit portion.

[0011] Furthermore, the cross-sectional area of ​​the lower limit portion is greater than the cross-sectional area of ​​the upper limit portion.

[0012] Furthermore, the chassis includes an upper plate and a lower plate that are clamped together, and the bottom of the column extends radially to form an outer flange, and the outer flange is clamped between the upper plate and the lower plate.

[0013] Furthermore, the infusion needle assembly also includes a hose, one end of which is connected to a connector, and the other end of which is connected to a butterfly wing, and the needle body is fixedly connected to the butterfly wing.

[0014] Furthermore, a fixing block protrudes from the bottom of the butterfly wing, and a clamping claw protrudes upward from the chassis for clamping and fixing the fixing block.

[0015] Furthermore, one of the upper plate or the lower plate is protruding toward the other to form a boss, and the other is recessed to form a slot for the boss to be inserted into.

[0016] Beneficial effects of the present invention: The present invention uses an elastic deformation groove that only allows the upward slider to pass through and prevents the slider from moving downward to confine the needle tip within the first needle hole after the infusion is completed, forming an anti-needle puncture protection structure and effectively avoiding injuries caused by the exposure of the needle tip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the present invention in a protection state;

[0020] Figure 3 It is a schematic diagram of the structure of the present invention in an infusion state;

[0021] Figure 4 It is a schematic diagram of the structure of the upper plate and the lower plate;

[0022] Figure 5 It is a schematic diagram of the structure of the blocking member and the column;

[0023] Figure 6 is a front view of the blocking member;

[0024] Figure 7It is a schematic diagram of the structure of the butterfly wing and the needle body;

[0025] Figure 8 It is a structural diagram of the slider.

[0026] In the figure:

[0027] 1. Infusion needle assembly; 101. needle body; 1011. needle tip; 102. slider; 1021. sliding part; 1022. extension part; 1023. second needle hole; 1024. upper limit part; 1025. lower limit part; 1026. connecting part; 103. hose; 104. joint; 105. butterfly wing; 1051. fixing block; 106. stop clamp;

[0028] 2. base; 201. chassis; 2011. first pinhole; 2012. upper plate; 2013. lower plate; 2014. clamping claw; 2015. boss; 2016. slot; 2017. perforation; 202. column; 2021. slideway; 2022. outer flange;

[0029] 3. Blocking member; 301. Elastic deformation groove; 302. Elastic notch; 303. Elastic claw; 3031. Fixed end; 3032. Free end; 3033. Blocking surface. DETAILED DESCRIPTION

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0031] like Figure 1 As shown, a needle puncture protection structure for an infusion needle comprises:

[0032] An infusion needle assembly 1, comprising a needle body 101 and a slider 102 fixed to the needle body 101;

[0033] The base 2 includes a chassis 201 and a column 202 fixedly connected to the chassis 201. The chassis 201 is provided with a first needle hole 2011. When the needle tip 1011 of the needle body 101 passes downward through the first needle hole 2011, it is in an infusion state. At this time, the needle body 101 can be inserted into the patient's body for infusion. When the needle tip 1011 of the needle body 101 is located in the first needle hole 2011, it is in a protection state. The needle tip 1011 will not be exposed to injure medical staff. A slideway 2021 extending longitudinally and for the slider 102 to slide is formed inside the column 202. The slider 102 can slide up and down in the slideway 2021 to drive the needle body 101 to extend out of the first needle hole 2011 or retract into the first needle hole 2011 to form an infusion state or a protection state.

[0034] And a blocking member 3, which is arranged on the extension track of the slideway 2021 and is located at the top thereof, and has an elastic deformation groove 301 that only allows the upward sliding block 102 to pass through and prevents the sliding block 102 from moving downward; Figure 3 As shown, when the slider 102 is located below the blocking member 3, it can slide freely. When the slider 102 moves up to the position of the elastic deformation groove 301, the elastic deformation groove 301 can be elastically deformed to allow the slider 102 to pass through. After the slider 102 passes through the elastic deformation groove 301, the elastic deformation groove 301 is reset, and the blocking member 3 can limit the position of the slider 102 to prevent it from moving downward, as shown in FIG. Figure 2 As shown,.

[0035] In the initial state, the slider 102 is located below the blocking member 3, and the needle body 101 passes through the first needle hole 2011. The medical staff inserts it into the patient's body for infusion. After the infusion is completed, the medical staff pulls the needle body 101 out of the patient's body and drives the needle body 101 to move upward. During the upward movement, after the slider 102 passes through the elastic deformation groove 301, the blocking member 3 confines the slider 102 above it. At this time, the needle tip 1011 of the needle body 101 is located inside the first needle hole 2011, forming an anti-needle puncture protection structure, which effectively avoids the injury caused by the exposure of the needle tip 1011.

[0036] In some examples, such as Figure 5 and Figure 6As shown, the blocking member 3 is a spring fixed on the top of the slide 2021, and the elastic deformation groove 301 is located in the center thereof. The blocking member 3 and the elastic deformation groove 301 may be, but are not limited to, regular or irregular shapes such as rectangles and circles. The shape of the slide 2021 matches the shape of the blocking member 3. For the convenience of processing, the blocking member 3, the elastic deformation groove 301 and the slide 2021 in this embodiment are all circular. The groove wall of the elastic deformation groove 301 is provided with a plurality of elastic notches 302 which are connected thereto and extend radially. Due to the presence of the elastic notches 302, the elastic deformation groove 301 has the ability to deform, and it can be deformed when the slider 102 moves up and applies pressure to it, and it can be reset after the slider 102 passes to prevent it from moving downward.

[0037] In some examples, such as Figure 5 and Figure 6 As shown, the elastic notch 302 divides the spring sheet into a plurality of elastic claws 303 spaced apart along the circumferential direction, each elastic claw 303 includes a fixed end 3031 and a free end 3032, the fixed end 3031 is located on the outside, the free end 3032 is located on the inside, and the plurality of free ends 3032 enclose the elastic deformation groove 301, the elastic claw 303 gradually bends upward from the fixed end 3031 to the free end 3032 to form an arc structure, and the end surfaces of the plurality of free ends 3032 enclose a blocking surface 3033 for blocking the slider 102 from moving downward, and the blocking surface 3033 abuts against the slider 102 to move the slider The position of the slider 102 is limited, and the blocking surface 3033 is preferably a horizontal surface to stably support the slider 102 at the top; the elastic claws 303 of the arc structure move away from each other when the upward slider 102 applies pressure to them, so that the elastic deformation groove 301 expands to allow the slider 102 to pass through. After the slider 102 passes, the elastic claws 303 are reset to drive the elastic deformation groove 301 to shrink to limit the position of the slider 102. When there is a tendency to move downward, the elastic claws 303 of the arc structure will move closer to each other when the slider 102 applies pressure to further shrink the elastic deformation groove 301 to block the slider 102, thereby improving the reliability of the entire device.

[0038] In some examples, such as Figure 8 As shown, the slider 102 includes a sliding portion 1021 slidably arranged inside the slide 2021 and an extension portion 1022 extending out of the slide 2021. The slide 2021 radially penetrates the column 202 to allow the extension portion 1022 to extend out. The cross-sectional area of ​​the sliding portion 1021 is larger than the cross-sectional area of ​​the extension portion 1022 to form a T-shaped structure, which can prevent the slider 102 from laterally escaping from the slide 2021. The extension portion 1022 is provided with a second needle hole 1023 for the needle body 101 to pass through. The needle body 101 passes through the second needle hole 1023 and the two are relatively fixed to achieve synchronous movement of the two. The fixing method can be but is not limited to welding, bonding or hot melt fixing.

[0039] In some examples, such as Figure 8 As shown, the sliding portion 1021 includes an upper limit portion 1024 located at the top, a lower limit portion 1025 located at the bottom, and a connecting portion 1026 for connecting the upper limit portion 1024 with the lower limit portion 1025. The cross-sectional areas of the upper limit portion 1024 and the lower limit portion 1025 are both larger than the cross-sectional area of ​​the connecting portion 1026. The upper limit portion 1024 has a guiding surface for guiding it to pass through the elastic deformation groove 301. The guiding surface is a conical surface with a smaller upper portion and a larger lower portion. When the upper limit portion 1024 passes through the elastic deformation groove 301, the spring sheet is clamped between the upper limit portion 1024 and the lower limit portion 1025, thereby limiting the position of the slider 102.

[0040] In some examples, such as Figure 8 As shown, the cross-sectional area of ​​the lower limit portion 1025 is greater than the cross-sectional area of ​​the upper limit portion 1024, so that after the upper limit portion 1024 passes through the elastic deformation groove 301, the lower limit portion 1025 with a large cross-section is intercepted under the elastic deformation groove 301, thereby preventing the slider 102 from slipping upward out of the slideway 2021, causing the needle body 101 to be exposed.

[0041] In some examples, such as Figure 4 As shown, the chassis 201 includes an upper plate 2012 and a lower plate 2013 that are clamped together. The upper plate 2012 is provided with a through hole 2017 for the column 202 to pass through, and the bottom of the column 202 radially extends to form an outer flange 2022. During installation, the column 202 is first passed through the through hole 2017 from bottom to top, and the outer flange 2022 is then abutted against the bottom surface of the upper plate 2012. Then the upper plate 2012 and the lower plate 2013 are clamped together. At this time, the outer flange 2022 is clamped between the upper plate 2012 and the lower plate 2013, so that the upper plate 2012, the lower plate 2013 and the column 202 can be fixed to form a base 2. In addition, since this solution is suitable for long-term infusion, a silicone gasket is provided on the bottom surface of the lower plate 2013 to fit the patient's skin, thereby increasing the patient's comfort and performing initial positioning of the chassis 201. Then the entire device is fixed by tape.

[0042] In some examples, such as Figure 1 As shown, the infusion needle assembly 1 also includes a hose 103, one end of the hose 103 is connected to a connector 104, the other end is connected to a butterfly wing 105, and a stop clamp 106 for blocking or connecting the liquid medicine in the hose 103 is installed on the hose 103, the needle body 101 is fixedly connected to the butterfly wing 105, after the infusion is completed, the medical staff can grab the butterfly wing 105 to pull the needle body 101 out of the patient's body, and the butterfly wing 105 has a large area, which is convenient for medical staff to grasp.

[0043] In some examples, such as Figure 3 and Figure 7As shown, a fixing block 1051 protrudes from the bottom of the butterfly wing 105, and a clamping claw 2014 protrudes upward from the chassis 201 for clamping and fixing the fixing block 1051. During infusion, the fixing block 1051 can be clamped into the clamping claw 2014 to fix the needle body 101, thereby avoiding the pain caused to the patient by the displacement of the needle body 101 during the infusion process.

[0044] In some examples, such as Figure 4 As shown, one of the upper plate 2012 or the lower plate 2013 protrudes toward the other to form a boss 2015, and the other is recessed to form a slot 2016 for the boss 2015 to be inserted into. The boss 2015 is inserted into the slot 2016 to achieve the connection between the upper plate 2012 and the lower plate 2013. In order to improve the connection strength between the two, glue can be glued on the edges of the two.

[0045] Working principle:

[0046] Assembly method: first, pass the column 202 from bottom to top through the perforation of the upper plate 2012, at this time, the outer flange 2022 abuts against the bottom surface of the upper plate 2012, and then the upper plate 2012 and the lower plate 2013 are clamped together to form the base 2, then the needle tip 1011 of the needle body 101 is inserted into the second needle hole 1023 of the slider 102 and the needle tail is fixed to the slider 102 to form an assembly, and then the sliding part 1021 is sent from the top of the column 202 into the slideway 2021, and the needle tip 1011 is inserted into the first needle hole 2011 of the chassis 201, and the fixing block 1051 on the butterfly wing 105 is clamped into the clamping claw 2014 of the chassis 201, and finally the blocking member 3 is fixed to the top of the column 202. At this time, the anti-needle puncture protection structure is assembled. During the infusion process, the connecting port of the infusion needle is connected to the hose 103 of the infusion needle assembly 1 before infusion.

[0047] Usage: Before infusion, first connect the connector 104 to the liquid storage container. At this time, the fixed block 1051 of the infusion needle assembly 1 is clamped with the bottom plate 201. The medical staff inserts the needle body 101 into the part of the patient that needs infusion. After the silicone gasket of the lower plate 2013 fits the skin, the infusion can be carried out. The liquid medicine enters the needle body 101 through the connector 104 and the hose 103 and is then infused into the patient's body. After the infusion is completed, the stop clamp 106 on the infusion needle assembly 1 is closed to prevent the liquid medicine from continuing to be transmitted. The medical staff grabs the butterfly wing 105 and pulls out the needle body 101 vertically. During the pulling-out process, the slider 102 moves upward along the slideway 2021 until the upper limit portion 1024 passes through the elastic deformation groove 301 and cannot move downward. At this time, the needle tip 1011 of the needle body 101 is located inside the first needle hole 2011, forming an anti-needle puncture protection structure, which effectively avoids the injury caused by the exposure of the needle tip 1011.

[0048] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A needle puncture protection structure for an infusion needle, characterized in that: include: An infusion needle assembly (1), comprising a needle body (101) and a sliding block (102) fixed to the needle body (101); A base (2) comprising a chassis (201) and a column (202) fixedly connected to the chassis (201), wherein a slideway (2021) extending longitudinally and for the sliding block (102) to slide is formed inside the column (202), and the chassis (201) is provided with a first needle hole (2011), and when the needle tip (1011) of the needle body (101) passes downward through the first needle hole (2011), it is in an infusion state, and when the needle tip (1011) of the needle body (101) is located in the first needle hole (2011), it is in a protection state; and a blocking member (3) disposed on an extension track of the slideway (2021) and having an elastic deformation groove (301) that only allows the upward moving slider (102) to pass through and prevents the slider (102) from moving downward; The blocking member (3) is a spring sheet fixed on the top of the slideway (2021), the elastic deformation groove (301) is located at the center thereof, and the groove wall of the elastic deformation groove (301) is provided with a plurality of elastic notches (302) connected thereto and extending in the radial direction; The slider (102) comprises a sliding portion (1021) slidably disposed inside the slideway (2021) and an extension portion (1022) extending out of the slideway (2021); the extension portion (1022) is provided with a second needle hole (1023) for the needle body (101) to pass through; the needle body (101) passes through the second needle hole (1023) and the two are relatively fixed; The sliding portion (1021) comprises an upper limit portion (1024) located at the top, a lower limit portion (1025) located at the bottom, and a connecting portion (1026) for connecting the upper limit portion (1024) and the lower limit portion (1025); the upper limit portion (1024) has a guiding surface for guiding it to pass through the elastic deformation groove (301); and after it passes through the elastic deformation groove (301), the spring sheet is clamped between the upper limit portion (1024) and the lower limit portion (1025).

2. The needle-puncture protection structure for an infusion needle according to claim 1, characterized in that: The elastic notch (302) divides the spring sheet into a plurality of elastic claws (303) spaced apart along the circumferential direction, each elastic claw (303) comprising a fixed end (3031) and a free end (3032), and the elastic claw (303) gradually bends upwards in a direction from the fixed end (3031) to the free end (3032), and the end surfaces of the plurality of free ends (3032) enclose a blocking surface (3033) for blocking the sliding block (102) from moving downwards.

3. The needle-puncture protection structure for an infusion needle according to claim 1, characterized in that: The cross-sectional area of ​​the lower limit portion (1025) is greater than the cross-sectional area of ​​the upper limit portion (1024).

4. The needle-puncture protection structure for an infusion needle according to claim 1, characterized in that: The chassis (201) comprises an upper plate (2012) and a lower plate (2013) which are arranged in a clamped manner, and the bottom of the column (202) is radially extended to form an outer flange (2022), and the outer flange (2022) is clamped between the upper plate (2012) and the lower plate (2013).

5. The needle-puncture protection structure for an infusion needle according to claim 1, characterized in that: The infusion needle assembly (1) further comprises a hose (103), one end of the hose (103) being connected to a connector (104), and the other end of the hose (103) being connected to a butterfly wing (105), and the needle body (101) and the butterfly wing (105) being fixedly connected.

6. The needle-puncture protection structure for an infusion needle according to claim 5, characterized in that: A fixing block (1051) protrudes from the bottom of the butterfly wing (105), and a clamping claw (2014) protrudes upward from the bottom plate (201) for clamping and fixing the fixing block (1051).

7. The needle-puncture protection structure for an infusion needle according to claim 4, characterized in that: One of the upper plate (2012) or the lower plate (2013) protrudes toward the other to form a boss (2015), and the other is recessed to form a slot (2016) for the boss (2015) to be inserted into.

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