Injector and infusion apparatus sealing tube butt joint device

Abstract

The utility model relates to the technical field of medical devices, in particular to a sealing tube butting device for an injector and an infusion apparatus. The butt joint sleeve is fixedly arranged at the rear end of the infusion connector, the injection end is detachably connected to the rear portion of the infusion connector and penetrates through the butt joint sleeve, and the locking assembly is arranged on the butt joint sleeve and used for enabling the infusion connector and the injection end to move or not move relatively. The device solves the problem that when an injector is connected with an infusion connector for flushing and sealing a tube, the injector is prone to popping out liquid and spraying outwards.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical device technical field especially, relate to a kind of syringe and infusion device pipe sealing docking device. BACKGROUND

[0002] Venous indwelling catheter has been widely used in clinic, and flushing pipe is one of the important links to prevent complications during catheter indwelling and ensure normal use of catheter. The purpose of flushing is to flush the residual liquid medicine in the catheter into the blood vessel and remove the accumulated liquid medicine in the catheter, thereby reducing the risk of incompatible drug contact and preventing complications. Pipe sealing is performed after infusion is completed to reduce the risk of internal cavity blockage and catheter-related bloodstream infection by using different types of pipe sealing liquid.

[0003] However, the following problems exist in clinical operation:

[0004] 1. After the syringe is connected to the infusion connector, the liquid in the syringe is injected into the catheter through the infusion connector by pushing the syringe push plate. When the injection speed is too fast due to the change of extrusion force during injection, the instantaneous pressure at the connection between the syringe and the infusion connector increases, which causes the syringe to easily eject liquid outside when the syringe is connected to the infusion connector for flushing and sealing the pipe. UTILITARY MODEL CONTENT

[0005] To solve the above problems, the utility model aims to provide a kind of syringe and infusion device pipe sealing docking device, which solves the problem of syringe easily ejecting liquid outside when syringe is connected to infusion connector for flushing and sealing pipe.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A kind of syringe and infusion device pipe sealing docking device, comprising an infusion connector, a docking sleeve fixed to the rear end of the infusion connector, an injection end head detachably connected to the rear part of the infusion connector and penetrating the docking sleeve, and a locking assembly provided on the docking sleeve and used to make the infusion connector and the injection end head relatively movable or stationary;

[0008] The locking assembly comprises a pair of elastic sealing rings respectively fixed to the upper and lower ends of the docking sleeve and sealingly connected with the outer wall of the injection end head, an exhaust air bag fixed to the outer wall of the docking sleeve, a pair of air suction one-way valves respectively provided on the left and right sides of the inner wall of the middle section of the docking sleeve and used to make the gas inside the docking sleeve flow one-way to the exhaust air bag, a pair of sliding rails respectively fixed to the outer wall of the lower part of the docking sleeve and arranged in the left and right directions, a pair of sliding members respectively movably arranged in the corresponding sliding rails, a pair of connecting members respectively fixed to the corresponding sliding members and fixedly connected with the outer wall of the corresponding side of the exhaust air bag, and a pressure relief subassembly fixed to the front part of the docking sleeve and used to make external air enter the docking sleeve.

[0009] More preferably, the pressure relief sub-assembly includes an air supply pipe fixed to the docking sleeve and used to connect external air with the air inside the docking sleeve; a pair of magnetic plates fixed to the upper and lower sides of the outer wall of the end of the air supply pipe away from the docking sleeve, which are magnetically attracted to each other and used to prevent external air from entering the air supply pipe; an elastic sealing plate fixed to the inner wall of the end of the air supply pipe away from the docking sleeve and located between the two magnetic plates; and a clamp fixed to the end of the air supply pipe away from the docking sleeve and used to separate the upper and lower magnetic plates.

[0010] More preferably, the clamp consists of a pair of clamps whose rear ends are fixedly connected to the outer wall of the corresponding side of the gas pipeline, a pair of rotating parts fixedly disposed in the middle section of each clamp, and a rotating shaft that passes through the two rotating parts in the left-right direction and is rotatably connected to the two rotating parts respectively.

[0011] More preferably, a pair of exhaust one-way valves are fixedly provided on the front and rear sides of the exhaust airbag sidewall for allowing the gas inside the exhaust airbag to flow unidirectionally to the outside air.

[0012] More preferably, a force-applying member is fixed on the side of each of the two sliding members away from their respective connecting members.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model solves the problem of liquid spraying from the syringe when connecting the syringe to the infusion connector by inserting the syringe tip into the rear end of the infusion connector, with the middle section of the syringe tip passing through the docking sleeve. The sealing ring inside the docking sleeve abuts and seals against the side wall of the syringe tip. Then, the operator pulls the sliding member outwards to the left and right sides away from the docking sleeve, causing the connecting member fixedly connected to the sliding member to stretch the side wall of the exhaust air bladder fixedly connected to the connecting member outwards. This expands the internal space of the exhaust air bladder, causing the air pressure inside the exhaust air bladder to be lower than the air pressure inside the docking sleeve. As a result, the gas inside the docking sleeve is drawn into the exhaust air bladder through the suction one-way valve, creating a negative pressure state between the sealing rings at both ends of the docking sleeve. Under the action of external atmospheric pressure, the sealing rings tightly adhere to the side wall of the syringe tip and apply pressure to the syringe tip towards the infusion connector. This solves the problem of the syringe easily ejecting liquid when flushing the tubing during syringe connection to the infusion connector.

[0015] 2. This utility model allows the operator to easily remove the injection tip from the docking sleeve when the injection tip needs to be replaced. By pressing the clamps on both sides, the clamps rotate along the axis of rotation, causing the magnetic suction plates fixedly connected to the rear end of the clamps to separate. This separation is achieved by lever principle, which opens the end of the gas delivery tube away from the docking sleeve, connecting the external space with the internal space of the docking sleeve. This allows external air to enter the docking sleeve along the gas delivery tube, balancing the air pressure inside the docking sleeve and preventing atmospheric pressure from compressing the sealing ring. As a result, the operator can easily pull the injection tip out of the docking sleeve.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an overall explosion view of the utility model;

[0017] Figure 2 It is an overall shaft side view structure schematic view of the utility model;

[0018] Figure 3 It is an overall cut structure schematic view of the utility model;

[0019] Figure 4 It is an isolated enlarged view of the pressure relief subassembly of the utility model.

[0020] Brief description of the drawings: 1, infusion connector; 2, butt joint sleeve; 3, injection end head; 4, locking assembly; 41, sealing ring; 42, exhaust air bag; 43, air suction one-way valve; 44, sliding rail; 45, sliding piece; 46, connecting piece; 47, pressure relief subassembly; 471, gas conveying pipe; 472, magnetic suction piece; 473, sealing piece; 474, clamp; 4741, clamping piece; 4742, rotating piece; 4743, rotating shaft; 5, exhaust one-way valve; 6, force applying piece. DETAILED DESCRIPTION

[0021] The utility model will be further explained in detail below in combination with the drawings and specific embodiments

[0022] As Figure 1 , Figure 2 and Figure 3 Indicated, a syringe and infusion device sealing pipe butt joint device of the embodiment, including infusion connector 1, butt joint sleeve 2 that is fixedly arranged at the rear end of infusion connector 1, injection end head 3 that can be detachably connected to the rear part of infusion connector 1 and is arranged through butt joint sleeve 2 and locking assembly 4 that is arranged on butt joint sleeve 2 and is used to make infusion connector 1 and injection end head 3 relative movement or inactivity;

[0023] Locking assembly 4 includes a pair of elastic sealing rings 41 that are respectively fixedly arranged at the upper and lower ends in butt joint sleeve 2 and are sealingly connected with the outer wall of injection end head 3, exhaust air bag 42 that is fixedly arranged on the outer wall of butt joint sleeve 2, a pair of air suction one-way valves 43 that are respectively arranged on the left and right sides of the inner wall of the middle section of butt joint sleeve 2 and are used to make the one-way flow of the gas in butt joint sleeve 2 to exhaust air bag 42, a pair of sliding rails 44 that are respectively fixedly arranged on the outer wall of the lower part of butt joint sleeve 2 and are arranged along the left and right directions, a pair of sliding pieces 45 that are respectively movably arranged in the corresponding sliding rails 44, a pair of connecting pieces 46 that are respectively fixedly arranged on the corresponding sliding pieces 45 and are fixedly connected with the outer wall of exhaust air bag 42 on the corresponding side, and pressure relief subassembly 47 that is fixedly arranged on the front part of butt joint sleeve 2 and is used to make the external air enter butt joint sleeve 2.

[0024] In use, the injection end 3 is inserted into the rear end of the infusion connector 1 through the rear end of the butt joint sleeve 2, so that the two sealing rings 41 wrap and fit the outer walls of the front and rear parts of the injection end 3, thereby making the outer wall of the middle part of the injection end 3 in the butt joint sleeve 2 in a sealed state with the upper and lower sealing rings 41, driving the sliding member 45 to slide outward along the corresponding sliding track 44, causing the connecting member 46 fixed on the sliding member 45 to drive the corresponding side outer wall of the exhaust air bag 42 to deform outward, thereby expanding the internal space of the exhaust air bag 42. During the expansion of the exhaust air bag 42, the air pressure in the exhaust air bag 42 decreases, causing the air in the middle part of the butt joint sleeve 2 to be sucked into the exhaust air bag 42 through the air suction check valve 43, thereby reducing the air pressure between the outer wall of the middle part of the injection end 3 in the butt joint sleeve 2 and the upper and lower sealing rings 41, causing the outer wall of the middle part of the injection end 3 in the butt joint sleeve 2 to be in a negative pressure state with the upper and lower sealing rings 41, thereby being pressed by the atmospheric pressure, causing the friction between the sealing ring 41 and the outer wall of the injection end 3 to increase under the action of the atmospheric pressure, causing the position of the injection end 3 relative to the butt joint sleeve 2 to be fixed, thereby preventing the injection end 3 from being separated from the connection position of the infusion connector 1 under the action of the atmospheric pressure.

[0025] As shown in Figure 1 , Figure 2 and Figure 4 , the pressure relief subassembly 47 includes a gas delivery pipe 471 fixed to the butt joint sleeve 2 and used for communicating the external air with the internal air of the butt joint sleeve 2, a pair of magnetic attraction pieces 472 respectively fixed to the upper and lower sides of the outer wall of the end of the gas delivery pipe 471 away from the butt joint sleeve 2 and used for isolating the external air from entering the gas delivery pipe 471, a resilient sealing piece 473 fixed to the inner wall of the end of the gas delivery pipe 471 away from the butt joint sleeve 2 and located between the two magnetic attraction pieces 472, and a clamp 474 fixed to the end of the gas delivery pipe 471 away from the butt joint sleeve 2 and used for separating the upper and lower magnetic attraction pieces 472.

[0026] In use, the free end of the clamp 474 is pressed, causing the clamp 474 to drive the two magnetic attraction pieces 472 to separate from each other away from the gas delivery pipe 471, causing the end of the gas delivery pipe 471 away from the butt joint sleeve 2 to open, causing the external space to be connected with the space between the outer wall of the middle part of the injection end 3 in the butt joint sleeve 2 and the upper and lower sealing rings 41, causing the external air to flow into the space between the outer wall of the middle part of the injection end 3 in the butt joint sleeve 2 and the upper and lower sealing rings 41 through the gas delivery pipe 471, thereby balancing the air pressure between the outer wall of the middle part of the injection end 3 in the butt joint sleeve 2 and the upper and lower sealing rings 41 and the external environment, causing the atmospheric pressure to no longer exert pressure on the two sealing rings 41. At this time, the operator can pull out the injection end 3 rearward.

[0027] As shown in Figure 4As shown, the clamp 474 is composed of a pair of rear ends of the clamping pieces 4741 fixedly connected with the corresponding side outer wall of the gas conveying pipe 471, a pair of rotating pieces 4742 fixedly arranged at the middle section of each clamping piece 4741, and a rotating shaft 4743 penetrating through the two rotating pieces 4742 and rotatably connected with the two rotating pieces 4742.

[0028] When the product is used, the free ends of the two clamping pieces 4741 are pressed, so that the two clamping pieces 4741 separate the magnetic attraction pieces 472 by the principle of leverage, drive the corresponding side magnetic attraction pieces 472 to separate from each other away from the gas conveying pipe 471, and after the clamping pieces 4741 are released, the two magnetic attraction pieces 472 are attracted to each other and close to each other, so that the upper and lower sides of the end of the gas conveying pipe 471 away from the docking sleeve 2 are close to each other, so that the sealing piece 473 is compressed and extruded, thereby isolating the external air from entering the gas conveying pipe 471, facilitating the next time the injection tip 3 is inserted behind for convenient use.

[0029] As shown in Figure 1 and Figure 2 , the side wall of the exhaust air bag 42 is fixedly provided with a pair of exhaust air one-way valves 5 on the front and rear sides for allowing the gas in the exhaust air bag 42 to flow outward to the external air in a one-way manner.

[0030] When the product is used, after the liquid in the syringe is completely injected into the infusion connector 1, the two force applying pieces 6 are pressed towards the exhaust air bag 42, so that the sliding pieces 45 slide along the sliding rails 44 towards the exhaust air bag 42, thereby causing the connecting pieces 46 fixedly connected with the corresponding sliding pieces 45 to drive the outer wall of the corresponding side exhaust air bag 42 to be compressed inward, thereby reducing the size of the internal space of the exhaust air bag 42, causing the gas in the exhaust air bag 42 to be discharged through the exhaust air one-way valve 5.

[0031] As shown in Figure 1 , Figure 2 and Figure 3 , the two sliding pieces 45 are respectively fixedly provided with a force applying piece 6 on the side away from the corresponding connecting piece 46.

[0032] When the product is used, the operator hooks the fingers into the two force applying pieces 6, which facilitates the operator to apply force to the two sliding pieces 45.

[0033] The working principle of the device is as follows:

[0034] Step 1: Insert the injection tip 3 into the rear end of the docking sleeve 2, so that the two sealing rings 41 wrap and fit the outer wall of the front and rear parts of the injection tip 3, thereby making the middle part of the outer wall of the injection tip 3 in the docking sleeve 2 in a sealed state with the upper and lower sealing rings 41.

[0035] Second step: the operator hooks his hands into the two side force applying members 6 and then pulls the two side force applying members 6 away from the exhaust air bag 42, thus driving the sliding members 45 to slide along the respective sliding tracks 44 outward, causing the connecting members 46 fixed on the sliding members 45 to drive the corresponding side outer walls of the exhaust air bag 42 to deform outward, thus expanding the internal space of the exhaust air bag 42.

[0036] Third step: during the expansion of the exhaust air bag 42, the air pressure inside the exhaust air bag 42 decreases, causing the air in the middle part of the docking sleeve 2 to be sucked into the exhaust air bag 42 through the air suction one-way valve 43, thus reducing the air pressure between the middle outer wall of the injection end head 3 and the upper and lower side sealing rings 41 in the docking sleeve 2, causing the middle outer wall of the injection end head 3 and the upper and lower side sealing rings 41 in the docking sleeve 2 to be in a negative pressure state, thus under the action of atmospheric pressure, the two side sealing rings 41 are squeezed by atmospheric pressure, thus the friction between the sealing ring 41 and the outer wall of the injection end head 3 is enhanced under the action of atmospheric pressure, causing the position between the injection end head 3 and the docking sleeve 2 to be relatively fixed, thus preventing the injection end head 3 from being separated from the connection position with the infusion connector 1 under the action of atmospheric pressure.

[0037] Fourth step: after the liquid in the syringe is completely injected into the infusion connector 1, the two side force applying members 6 are pressed towards the exhaust air bag 42, causing the sliding members 45 to slide along the sliding tracks 44 towards the exhaust air bag 42, thus causing the connecting members 46 fixedly connected with the corresponding sliding members 45 to drive the corresponding side outer walls of the exhaust air bag 42 to compress inward, thus reducing the internal space of the exhaust air bag 42, causing the gas inside the exhaust air bag 42 to be discharged through the exhaust one-way valve 5, and then the free ends of the two side clamping members 4741 are pressed, causing the two side clamping members 4741 to respectively drive the corresponding side magnetic attraction pieces 472 to move away from each other, thus driving the gas conveying tube 471 to open away from one end of the docking sleeve 2, causing the external space to be connected with the space between the middle outer wall of the injection end head 3 and the upper and lower side sealing rings 41 in the docking sleeve 2, causing the external air to flow into the space between the middle outer wall of the injection end head 3 and the upper and lower side sealing rings 41 in the docking sleeve 2 through the gas conveying tube 471, thus balancing the air pressure between the middle outer wall of the injection end head 3 and the upper and lower side sealing rings 41 in the docking sleeve 2 and the external environment, causing the atmospheric pressure to no longer exert pressure on the two side sealing rings 41, at which time the operator can pull out the injection end head 3.

[0038] Fifth step: after the clamping member 4741 is loosened, the two side magnetic attraction pieces 472 attract each other to move close to each other, thus causing the upper and lower sides of the gas conveying tube 471 to move close to each other away from the docking sleeve 2, causing the sealing piece 473 to be compressed and squeezed, thus isolating the external air from entering the gas conveying tube 471, thus facilitating the next time the injection end head 3 is inserted.

[0039] The above merely describes a specific implementation of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structural transformation or direct or indirect application in other related technical fields using the content of the present application specification and drawings are also included in the patent protection scope of the present application.

Claims

1. A syringe and infusion set sealing device, characterized in that: The utility model provides an injection head locking device, which comprises a transfusion connector (1), a butt sleeve (2) fixed to the rear end of the transfusion connector (1), an injection head (3) detachably connected to the rear part of the transfusion connector (1) and penetrating through the butt sleeve (2), and a locking assembly (4) arranged on the butt sleeve (2) and used for enabling the transfusion connector (1) and the injection head (3) to be relatively movable or stationary. The locking assembly (4) comprises a pair of elastic sealing rings (41) respectively fixed to the upper and lower ends of the butt sleeve (2) and sealingly connected to the outer wall of the injection head (3), an exhaust air bag (42) fixed to the outer wall of the butt sleeve (2), a pair of air suction one-way valves (43) respectively arranged on the left and right sides of the inner wall of the middle section of the butt sleeve (2) and used for enabling the gas in the butt sleeve (2) to flow in one direction into the exhaust air bag (42), a pair of sliding rails (44) respectively fixed to the outer wall of the lower part of the butt sleeve (2) and arranged in the left and right directions, a pair of sliding members (45) respectively movably arranged in the corresponding sliding rails (44), a pair of connecting members (46) respectively fixed to the corresponding sliding members (45) and fixedly connected to the outer wall of the corresponding side of the exhaust air bag (42), and a pressure relief subassembly (47) fixed to the front part of the butt sleeve (2) and used for enabling external air to enter the butt sleeve (2).

2. The syringe and infusion set hub interface device of claim 1, wherein: The pressure relief subassembly (47) comprises a gas conveying pipe (471) fixed to the butt sleeve (2) and used for connecting the external air with the air in the butt sleeve (2), a pair of magnetic attraction pieces (472) respectively fixed to the outer wall of the one end of the gas conveying pipe (471) away from the butt sleeve (2) and magnetically attracted to each other and used for isolating the external air from entering the gas conveying pipe (471), an elastic sealing piece (473) fixed to the inner wall of the one end of the gas conveying pipe (471) away from the butt sleeve (2) and located between the two magnetic attraction pieces (472), and a clamp (474) fixed to the one end of the gas conveying pipe (471) away from the butt sleeve (2) and used for separating the upper and lower magnetic attraction pieces (472).

3. The syringe and infusion set hub interface device of claim 2, wherein: The clamp (474) comprises a pair of clamp members (4741) respectively fixed to the corresponding outer wall of the gas conveying pipe (471) at the rear end, a pair of rotating members (4742) respectively fixed to the middle sections of the clamp members (4741), and a rotating shaft (4743) penetrating through the two rotating members (4742) and rotationally connected to the two rotating members (4742) in the left and right directions.

4. The syringe and infusion set hub interface device of claim 2, wherein: The outer wall of the exhaust air bag (42) is fixed with a pair of exhaust air one-way valves (5) on the front and rear sides.

5. The syringe and infusion set hub interface device of claim 3, wherein: The side of each sliding member (45) away from the corresponding connecting member (46) is fixed with a force applying member (6).

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