Automatic hemostasis device for venous indwelling needle

Abstract

The invention relates to the technical field of medical equipment, and discloses a venous indwelling needle automatic hemostasis device which comprises a needle tube, a steel needle is inserted into the needle tube in a penetrating mode, a hose is arranged at the tail end of the needle tube, an opening and closing assembly is arranged on the outer surface of the needle tube, and a connector tube is fixedly connected to the end, away from the needle tube, of the hose. A binding assembly is arranged on the outer surface of the connector tube, the opening and closing assembly comprises an extension tube fixedly connected to the side edge of the needle tube, the end, away from the needle tube, of the extension tube is rotationally connected with a cap, a rubber plug is fixedly connected into the needle tube, and a sealing plate is slidably inserted into the rubber plug in a penetrating mode. By arranging the opening and closing assembly and the needle tube, movement transmission is achieved by rotating the cover cap, the sealing plate is driven to move, elastic potential energy of the second spring is used for storage, the sealing plate is rapidly pushed to seal the rubber plug after the needle is pulled out, the situation of blood backflow after the needle is pulled out is avoided, and manual pressing for hemostasis by workers is not needed; and the operation efficiency and convenience are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an automatic hemostasis device for intravenous indwelling needle. BACKGROUND

[0002] The intravenous indwelling needle is a commonly used intravenous infusion tool in clinical practice. The open type indwelling needle is a common type of intravenous indwelling needle, and its core feature is that the needle core needs to be manually removed after puncture, and then connected to the infusion device. It has a relatively simple structure, mainly composed of a puncture needle, a catheter, and a catheter seat. There is no pre-set closed infusion connector. After successful puncture, the needle core is withdrawn, and the infusion device is directly connected to the catheter seat for drug delivery. The cost is relatively low, but the operation requires high standardization, and is mainly used for short-term and intermittent infusion scenarios.

[0003] In the prior art, the patent literature with publication number CN208852144U proposes an intravenous indwelling needle, which includes a puncture needle, an indwelling catheter, a needle seat, an effusion cavity, an extension tube, a needle holder, an isolation plug, and a needle seat plug. The indwelling catheter is connected to the liquid output port at one end of the needle seat. The isolation plug is arranged in the inner cavity of the needle seat. The effusion cavity is arranged at the position close to the liquid output port of the needle seat. The effusion cavity is in the shape of a wheat ear, and the liquid outlet of the effusion cavity is connected to the liquid inlet of the indwelling catheter. The liquid inlet of the effusion cavity is connected to the liquid outlet of the extension tube. The needle seat plug is connected to the tail end of the puncture needle and located at the tail of the inner cavity of the needle seat. The needle tip of the puncture needle passes through the isolation plug, the needle seat, and the effusion cavity, and then passes out of the indwelling catheter through the liquid output port. The needle holder is connected to the needle seat plug to solve the technical problem that the angle between the effusion cavity and the side surface of the needle seat in the existing intravenous indwelling needle is relatively sharp, which easily forms a dead angle of liquid, causing the intravenous indwelling needle to easily retain air, and the retained air is not easy to discharge.

[0004] In view of the above and existing related technologies, the inventors believe that the following defects often exist: after puncture, the existing intravenous indwelling needle is prone to back bleeding after the puncture needle is pulled out. At this time, the staff needs to manually press the catheter to block the back bleeding, and then release the pressing after the liquid is inserted. This causes inconvenience in operation, and sometimes the pressing position deviates, which easily causes back bleeding. SUMMARY

[0005] The technical problem to be solved by the present application is that in the prior art, the puncture needle is pulled out, causing back bleeding which needs to be manually pressed, causing inconvenience, and the deviation of the pressing position will cause back bleeding. Therefore, we propose an automatic hemostasis device for intravenous indwelling needle.

[0006] In order to achieve the above object, the technical scheme adopted by the present application is as follows: a venous indwelling needle automatic hemostasis device, comprising a needle tube, a steel needle is arranged in the needle tube, a hose is arranged at the tail end of the needle tube, an opening and closing assembly is arranged on the outer surface of the needle tube, a joint pipe is fixedly connected to the end of the hose away from the needle tube, and a binding assembly is arranged on the outer surface of the joint pipe; The opening and closing assembly comprises an extension pipe fixedly connected to the side of the needle tube, a cap is rotatably connected to the end of the extension pipe away from the needle tube, a rubber plug is fixedly connected to the inside of the needle tube, and a sealing plate is slidably arranged in the rubber plug. The binding assembly comprises an upper cover and a lower cover covering the outer surface of the joint pipe, a hollow box is fixedly connected to the outer surface of the upper cover, a winding shaft is rotatably connected to the middle part of the hollow box, and an elastic binding belt is arranged on the outer surface of the winding shaft.

[0007] Preferably, the side of the sealing plate movably penetrates a sliding seat, a spring one is fixedly connected to the inside of the sealing plate, and the end of the spring one away from the inner wall of the sealing plate is fixedly connected to the end of the sliding seat extending into the sealing plate.

[0008] Preferably, the middle part of the cap is fixedly connected with a lead screw, the lead screw extends into the inside of the extension pipe, and the lead screw is threadedly connected to the middle part of the sliding seat.

[0009] Preferably, a through hole is formed in the middle part of the rubber plug, the steel needle penetrates into the inside of the through hole, and the sealing plate abuts against the outer surface of the steel needle.

[0010] Preferably, a groove is formed in the outer surface of the extension pipe, a positioning block is fixedly connected to the inner wall of the cap, and the positioning block is clamped in the inside of the groove.

[0011] Preferably, a clamping seat is fixedly connected to the outer surface of the lower cover, a clamping plate is fixedly connected to the end of the elastic binding belt extending out of the hollow box, and the clamping plate is slidably clamped in the inside of the clamping seat.

[0012] Preferably, a knob is slidably arranged at the end of the hollow box, the knob is clamped and sleeved on the outer surface of the winding shaft, a spring two is arranged in the inside of the knob, and the spring two abuts against the end of the winding shaft.

[0013] Preferably, a ratchet wheel is fixedly sleeved on the outer surface of the end of the knob extending into the hollow box, a pawl ring is fixedly connected to the inner wall of the hollow box, and the ratchet wheel is meshingly connected in the inside of the pawl ring.

[0014] Preferably, a clockwork spring is fixedly connected to the outer surface of the winding shaft, and the end of the clockwork spring away from the winding shaft is fixedly connected to the inner wall of the hollow box.

[0015] Preferably, the end of the joint pipe is provided with a heparin cap, the side of the joint pipe is fixedly connected with a protective cap, and the upper cover and the lower cover are buckled outside the protective cap.

[0016] Technical effects and advantages of the present application: In the present application, the opening and closing assembly is arranged at the needle tube, the rotation of the cap realizes motion transmission, drives the sealing plate to move, and stores the elastic potential energy of the second spring, so that the sealing plate pushes the rubber plug to be closed after the needle is pulled out, the blood backflow after the needle is pulled out is avoided, and the staff does not need to manually press the hemostasis, the operation efficiency and convenience are improved. In the present application, the binding assembly is arranged on the outer surface of the joint pipe, the joint pipe is conveniently bound, the detachable design is adopted to facilitate recycling and reuse, resources and costs are saved, and the patient can realize the winding of the elastic binding belt by the shaft rod through pushing and rotating the knob, the operation can be completed by one hand, which is convenient and fast and has strong adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0017] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the internal structure of the needle tube of the present application; Figure 3 It is a schematic diagram of the opening and closing assembly structure of the present application; Figure 4 It is a schematic diagram of the split structure of the opening and closing assembly of the present application; Figure 5 It is a schematic diagram of the binding assembly structure of the present application; Figure 6 It is a schematic diagram of the upper cover connection structure of the present application; Figure 7 It is a schematic diagram of the internal structure of the hollow box of the present application; Figure 8 It is a schematic diagram of the connection structure of the needle tube and the steel needle of the present application.

[0018] Legend: 1, needle tube; 2, steel needle; 3, hose; 4, joint pipe; 5, heparin cap; 6, protective cap; 7, opening and closing assembly; 71, rubber plug; 72, extension pipe; 73, cap; 74, sealing plate; 75, sliding seat; 76, screw rod; 77, through hole; 78, spring I; 79, groove; 710, positioning block; 8, binding assembly; 81, upper cover; 82, lower cover; 83, hollow box; 84, winding shaft; 85, elastic binding belt; 86, clamping plate; 87, clamping seat; 88, knob; 89, clockwork spring; 810, pawl ring; 811, ratchet; 812, spring II. DETAILED DESCRIPTION

[0019] It is easy to understand that, according to the technical solution of the present application, those skilled in the art can propose various structures and implementation manners that can be replaced with each other without changing the essential spirit of the present application. Therefore, the following detailed description and the accompanying drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the whole or as a limitation or restriction on the technical solution of the present application.

[0020] Referring to Figures 1 to 7 As shown, the present application provides a technical solution: an automatic hemostasis device for intravenous indwelling needle, comprising a needle tube 1, a steel needle 2 inserted in the inside of the needle tube 1, a hose 3 arranged at the tail end of the needle tube 1, an opening and closing assembly 7 arranged on the outer surface of the needle tube 1, a joint pipe 4 fixedly connected to the end of the hose 3 away from the needle tube 1, a binding assembly 8 arranged on the outer surface of the joint pipe 4, a heparin cap 5 arranged at the end of the joint pipe 4, and a protective cap 6 fixedly connected to the side of the joint pipe 4.

[0021] When the medical staff uses the indwelling needle on the patient, the steel needle 2 is squeezed by the opening and closing assembly 7, and after the steel needle 2 is pulled out, the needle tube 1 can be quickly closed and hemostasis is achieved, avoiding the backflow of blood after the needle is pulled out, and the staff does not need to manually press the hemostasis, improving the operation efficiency and convenience, and in addition, the joint pipe 4 is bound by the binding assembly 8, and the patient can complete the elastic adjustment operation with one hand.

[0022] Referring to Figures 2 to 4As shown, the opening and closing assembly 7 includes an extension tube 72 fixedly connected to the side of the needle tube 1, and a cap 73 rotatably connected to the end of the extension tube 72 away from the needle tube 1, and a rubber plug 71 fixedly connected to the inside of the needle tube 1, and a sealing plate 74 slidingly inserted into the inside of the rubber plug 71, and a sliding seat 75 movably inserted into the side of the sealing plate 74, and a spring I 78 fixedly connected to the end of the sliding seat 75 inserted into the inside of the sealing plate 74 away from the inner wall of the sealing plate 74, and a lead screw 76 fixedly connected to the middle of the cap 73 and extending into the inside of the extension tube 72, and the middle of the rubber plug 71 is provided with a through hole 77, and the steel needle 2 is inserted into the inside of the through hole 77, and the sealing plate 74 abuts against the outer surface of the steel needle 2, and the outer surface of the extension tube 72 is provided with a groove 79, and the inner wall of the cap 73 is fixedly connected with a positioning block 710 clamped into the inside of the groove 79.

[0023] Rotating the cap 73 drives the lead screw 76 to rotate, and in the process of rotating the lead screw 76 drives the sliding seat 75 to move along the axis direction of the lead screw 76 to the inside of the needle tube 1, and as the sliding seat 75 moves into the inside of the sealing plate 74, the spring I 78 is compressed, and when the spring I 78 is compressed to the extent that it cannot be contracted, the sliding seat 75 continues to move to push the sealing plate 74 to move to the middle of the through hole 77 of the rubber plug 71, until it abuts against the outer surface of the steel needle, and when the steel needle 2 is pulled out, the sealing plate 74 is quickly pushed into the through hole 77 under the action of the elastic force of the spring I 78, realizing the sealing of the rubber plug 71, avoiding the backflow of blood after pulling out the needle, and without the need for staff to manually press the hemostasis, improving the operation efficiency and convenience, and the groove 79 and the positioning block 710 are arranged in the cap 73 and the extension tube 72 respectively, and after rotating a fixed angle, the positioning block 710 is clamped into the groove 79, realizing the limiting, avoiding the opening of the through hole 77 caused by unintentional friction, and improving the safety.

[0024] Referring to Figures 5 to 7 Figures 5 to 7As shown, the binding assembly 8 comprises an upper cover 81 and a lower cover 82 covering the outer surface of the joint pipe 4, the outer surface of the upper cover 81 is fixedly connected with a hollow box 83, the middle part of the hollow box 83 is rotatably connected with a winding shaft 84, the outer surface of the winding shaft 84 is provided with an elastic binding belt 85, the outer surface of the lower cover 82 is fixedly connected with a clamping seat 87, one end of the elastic binding belt 85 extending out of the hollow box 83 is fixedly connected with a clamping plate 86, the clamping plate 86 is slidingly clamped in the inner part of the clamping seat 87, the end part of the hollow box 83 is slidingly inserted with a knob 88, the knob 88 is clamped and sleeved on the outer surface of the winding shaft 84, the inner part of the knob 88 is provided with a spring 812, the spring 812 abuts against the end part of the winding shaft 84, the outer surface of the one end of the knob 88 extending into the hollow box 83 is fixedly sleeved with a ratchet wheel 811, the inner wall of the hollow box 83 is fixedly connected with a pawl ring 810, the ratchet wheel 811 is meshingly connected in the inner part of the pawl ring 810, the outer surface of the winding shaft 84 is fixedly connected with a clockwork spring 89, the end part of the clockwork spring 89 away from the winding shaft 84 is fixedly connected with the inner wall of the hollow box 83, and the upper cover 81 and the lower cover 82 are clamped and buckled on the outer part of the protective cap 6.

[0025] The upper cover 81 and the lower cover 82 are clamped and buckled on the outer surface of the joint pipe 4, the end part buckles are used for fixing, the clamping plate 86 is pulled to drive the elastic binding belt 85 to be released from the winding shaft 84 and to be moved out of the hollow box 83, the elastic binding belt 85 is wound on the arm or the leg of the patient, finally the clamping plate 86 is pushed and clamped into the clamping seat 87, the elastic binding belt 85 is used for fixing the joint pipe 4, the one-way rotation characteristics of the ratchet wheel 811 and the pawl ring 810 ensure that the shaft is rotating smoothly in the clockwise direction, if loosening occurs in the daily activities of the patient, the patient can adjust the tightness degree by himself, first press the knob 88 to make the knob 88 slide on the outer surface of the shaft and push the ratchet wheel 811 and the pawl ring 810 to separate, then rotate the knob 88 to cooperate with the return force of the clockwork spring 89 to wind the elastic binding belt 85, so as to achieve the purpose of adjustment, and the patient can complete the operation with one hand, which is convenient and fast.

[0026] Working principle: when the medical staff uses the indwelling needle on the patient, first rotate the cap 73 to drive the screw rod 76 to rotate, the screw rod 76 rotates in the process will drive the sliding seat 75 along the axis direction of the screw rod 76 to the inside of the needle tube 1, with the sliding seat 75 to the inside of the sealing plate 74 will extrude spring 178, when the spring 178 is extruded to the extent that it cannot shrink, the sliding seat 75 continues to move and pushes the sealing plate 74 to the middle of the rubber plug 71 The opening 77 moves until it abuts against the outer surface of the steel needle, at this time the steel needle at the end of the steel needle 2 inserts the catheter at the front end of the needle tube 1 into the blood vessel of the patient, and then removes the steel needle 2 after stabilization, and then the steel needle 2 is removed from the middle of the rubber plug 71 The opening 77 is pushed into the opening 77 under the action of the spring 178, realizes the sealing of the rubber plug 71, avoids the backflow of blood after the needle is pulled out, then connects the hose 3 with the needle tube, and connects the liquid medicine with the connector pipe 4 to inject the liquid medicine; When the current liquid medicine injection is completed, the restraint assembly 8 is installed on the connector pipe 4, the specific operation is that the upper cover 81 and the lower cover 82 are covered and connected with the outer surface of the connector pipe 4, the end buckle is used for fixing, then the clamping plate 86 is pulled to drive the elastic restraint belt 85 to be released from the winding shaft 84 and moved out from the hollow box 83, the elastic restraint belt 85 is wound on the arm or leg of the patient, finally the clamping plate 86 is pushed and connected into the clamping seat 87, the elastic restraint belt 85 is fixed, the knob 88 sleeved on the outer end of the shaft rod is fixed with the ratchet 811, and the one-way rotation characteristic of the ratchet 811 and the pawl ring 810 ensures that the shaft rod rotates smoothly in the clockwise direction, and extrudes the clockwork spring 89 while releasing the elastic restraint belt 85, if loosening occurs in the daily activities of the patient, the patient can adjust the tightness, first press the knob 88 to make the knob 88 slide on the outer surface of the shaft rod and push the ratchet 811 and the pawl ring 810 apart, then rotate the knob 88 to cooperate with the return force of the clockwork spring 89 to wind the elastic restraint belt 85, so as to achieve the purpose of adjustment, and the patient can complete the operation with one hand, which is convenient and fast, and the restraint assembly 8 is detachable, which can be recycled after disinfection and sterilization under the condition of only contacting the skin of the patient, so as to save resources and cost; When the subsequent liquid medicine injection is completed, the restraint assembly 8 is disassembled, then the cap 73 is rotated to drive the screw rod 76 to reverse, the sliding seat 75 pulls the sealing plate 74 away from the rubber plug 71, the opening 77 is opened, and the liquid medicine can flow smoothly, and the cap 73 and the extension pipe 72 are directly provided with the groove 79 and the positioning block 710, which are connected, and the positioning block 710 is connected into the groove 79 after each rotation, which realizes limiting, avoids the opening of the opening 77 caused by accidental friction, and improves the safety.

[0027] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present application, and these modifications and changes should all belong to the protection scope of the present application.

Claims

1. An automatic hemostasis device for an indwelling intravenous needle, characterized in that, include: A needle tube (1) is provided with a steel needle (2) inserted inside the needle tube (1), a flexible tube (3) is provided at the tail end of the needle tube (1), an opening and closing component (7) is provided on the outer surface of the needle tube (1), a connector tube (4) is fixedly connected to the end of the flexible tube (3) away from the needle tube (1), and a restraint component (8) is provided on the outer surface of the connector tube (4). The opening and closing assembly (7) includes an extension tube (72) fixedly connected to the side of the needle tube (1), and a cap (73) is rotatably connected to one end of the extension tube (72) away from the needle tube (1). A rubber stopper (71) is fixedly connected inside the needle tube (1), and a sealing plate (74) is slidably inserted inside the rubber stopper (71). The restraint assembly (8) includes an upper cover (81) and a lower cover (82) covering the outer surface of the connector tube (4). A hollow box (83) is fixedly connected to the outer surface of the upper cover (81). A winding shaft (84) is rotatably connected to the middle of the hollow box (83). An elastic restraint band (85) is provided on the outer surface of the winding shaft (84).

2. The automatic hemostasis device for indwelling intravenous needles according to claim 1, characterized in that: The side of the sealing plate (74) is movably inserted with a slide (75), and a spring (78) is fixedly connected inside the sealing plate (74). The end of the spring (78) away from the inner wall of the sealing plate (74) is fixedly connected to the end of the slide (75) that extends into the sealing plate (74).

3. The automatic hemostasis device for indwelling intravenous needles according to claim 2, characterized in that: A lead screw (76) is fixedly connected to the middle of the cap (73), the lead screw (76) extends into the interior of the extension tube (72), and the lead screw (76) is threaded to the middle of the slide (75).

4. The automatic hemostasis device for indwelling intravenous needles according to claim 1, characterized in that: The rubber stopper (71) has a through opening (77) in the middle, the steel needle (2) is inserted inside the through opening (77), and the sealing plate (74) abuts against the outer surface of the steel needle (2).

5. The automatic hemostasis device for indwelling intravenous needles according to claim 1, characterized in that: The outer surface of the extension tube (72) is provided with a groove (79), and the inner wall of the cap (73) is fixedly connected with a positioning block (710), which is engaged inside the groove (79).

6. The automatic hemostasis device for indwelling intravenous needles according to claim 1, characterized in that: The outer surface of the lower cover (82) is fixedly connected to a card holder (87), and one end of the elastic restraint strap (85) extending out of the hollow box (83) is fixedly connected to a card plate (86), which is slidably engaged inside the card holder (87).

7. The automatic hemostasis device for indwelling intravenous needles according to claim 1, characterized in that: A knob (88) is slidably inserted into the end of the hollow box (83). The knob (88) is snapped onto the outer surface of the take-up shaft (84). A second spring (812) is provided inside the knob (88). The second spring (812) abuts against the end of the take-up shaft (84).

8. The automatic hemostasis device for indwelling intravenous needles according to claim 7, characterized in that: A ratchet (811) is fixedly fitted on the outer surface of one end of the knob (88) that extends into the hollow box (83). A pawl ring (810) is fixedly connected to the inner wall of the hollow box (83), and the ratchet (811) is engaged with the inside of the pawl ring (810).

9. The automatic hemostasis device for indwelling intravenous needles according to claim 1, characterized in that: A spring (89) is fixedly connected to the outer surface of the winding shaft (84), and the end of the spring (89) away from the winding shaft (84) is fixedly connected to the inner wall of the hollow box (83).

10. The automatic hemostasis device for indwelling intravenous needles according to claim 1, characterized in that: The end of the connector tube (4) is provided with a heparin cap (5), and a protective cap (6) is fixedly connected to the side of the connector tube (4). The upper cover (81) and the lower cover (82) are snapped together on the outside of the protective cap (6).

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