CN210020636U

CN210020636U - Withdrawing needleless connector

Info

Publication number: CN210020636U
Application number: CN201920695377.1U
Authority: CN
Inventors: 杨恚; 刘伟; 丛利; 赵明
Original assignee: Jinzhou Nord Medical Equipment Technology Co Ltd
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-02-07
Anticipated expiration: 2029-05-15

Abstract

The utility model discloses a pumpback needleless connector, which comprises a connecting base and a moving part; the connecting base comprises a base section and a connecting section, the base section is communicated with the indwelling pipeline system, one end of the moving member is sleeved in the connecting section, the other end of the moving member is arranged outside the connecting section, and an internal cavity is arranged between the moving member sleeved in the connecting section and the connecting section; set up and be provided with the activity space between the moving member outside the linkage segment and connection base, be provided with the driving piece corresponding to activity space department, press the driving piece, the driving piece takes place deformation and makes the moving member remove towards the direction of keeping away from connection base to hold the intracavity in inside and form the negative pressure, take out the blood inspection of returning through the negative pressure that forms. The utility model discloses a needleless connector of pumpback has increased the blood test function of pumpback on the basis of the original function of needleless connector, uses with keeping somewhere the needle cooperation, accompanies keeping somewhere the complete life cycle of needle, reduces and keeps somewhere the external port pollution risk of needle.

Description

Withdrawing needleless connector

Technical Field

The utility model relates to the field of medical equipment, more specifically say, relate to a needleless connector of pumpback.

Background

In the field of medical appliance application, a needleless connector is a common accessory of an infusion apparatus, and is often used in combination with an indwelling needle to be used as a port for injecting liquid medicine, a wash pipe and the like after puncture.

The combined instrument of the 'remaining needle + needleless connector' needs to check whether a remaining needle catheter matched with the combined instrument is unobstructed by using a blood drawing-back mode in the using process, because the needleless connector has a single function, the operation generally adopts a syringe filled with saline to connect the remaining needle, the blood drawing-back inspection is carried out through manual drawing-back, after the inspection is finished, the syringe is flushed and sealed and removed, or the syringe is flushed and then the infusion operation is carried out, but the blood drawing-back inspection needs to use disposable consumables such as a disposable syringe or a prefilled catheter flusher, the cost is high, four actions of connection, drawing-back, injection and removal are needed, the operation is complicated, short-time exposure of a port can be avoided in the remaining needle pipeline in the connection and removal processes, and the port pollution risk is increased.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a no adapter of pumpback has increased the blood test function of pumpback on the basis of the original function of no adapter, uses with keeping somewhere the needle cooperation, accompanies the complete life cycle of keeping somewhere the needle, makes things convenient for medical personnel to operate, reduces the use amount of disposable consumptive materials such as pre-filled formula catheter flusher, practices thrift the medical expenditure, reduces simultaneously and keeps somewhere the external port pollution risk of needle.

In order to achieve the above object, the utility model provides a following technical scheme:

a pumpback needleless connector comprises a connecting base and a moving member;

the connecting base comprises a base section and a connecting section, and an elastic body is sleeved in the moving piece;

the base section is communicated with an indwelling pipeline system, one end of the moving piece is sleeved in the connecting section, the other end of the moving piece is arranged outside the connecting section, and an internal cavity is arranged between the moving piece sleeved in the connecting section and the connecting section;

an elastic part is further arranged on the outer side of the moving part sleeved in the connecting section;

the movable space is arranged between the moving part and the connecting base outside the connecting section, the driving part is arranged at the position corresponding to the movable space, the driving part is pressed, the driving part deforms, and the moving part moves towards the direction far away from the connecting base, so that negative pressure is formed in the inner accommodating cavity, and blood is pumped back for examination through the formed negative pressure.

Preferably, the moving member comprises a moving section and a fixed section; one end of the moving section is sleeved in the connecting section, and the other end of the moving section is arranged outside the connecting section and is in sealing connection with the fixed section;

the driving piece deforms and pushes the fixing section to move towards the direction far away from the connecting base so as to drive the moving section to move towards the direction far away from the connecting base, therefore, negative pressure is formed in the inner containing cavity, and blood is pumped back for examination through the formed negative pressure.

Preferably, the driving member is an elastic driving member, and the elastic driving member is pressed to generate acting force on the fixing section.

Preferably, a guide ring is arranged at the joint of the moving section and the connecting section, and the moving section is in clearance fit connection with the guide ring.

Preferably, the cover is established move the section outside and still be provided with spacing boss in the linkage segment, spacing boss with be provided with between the guide ring the elastic component, the elastic component cover is established outside moving the section, and one end supports spacing boss, and the other end supports the guide ring.

Preferably, the sleeve is arranged in the connecting section, a sealing groove is circumferentially arranged on the outer side of the moving section, a sealing ring is arranged in the sealing groove, and the sealing ring enables the moving section to be connected with the connecting section in a sealing manner.

According to foretell technical scheme, can know, the utility model discloses in, a needleless connector of pumpback, there is inside appearance chamber between moving member and the connection base, inside appearance chamber communicates through the base section with keeping somewhere the pipe-line system, when the direction of keeping away from the base section through driving piece drive moving member removes, can make inside appearance chamber volume increase between base section and the moving member, inside appearance intracavity will form certain negative pressure this moment then, can accomplish the blood inspection of pumpback, this operation can accomplish the blood inspection of pumpback through the needleless connector of pumpback self of this patent, and need not external source apparatus such as external syringe, and keep somewhere pipe-line system and be in the encapsulated situation all the time, can not bring the pollution consequently, the patient uses to keep somewhere the needle safer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a needle-less connector for drawing back according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a withdrawal needleless connector of an embodiment of the present invention;

fig. 3 is a schematic perspective view of a wedge ring according to an embodiment of the present invention;

fig. 4 is a front view of a wedge ring in an embodiment of the invention.

Wherein the reference numbers in the figures are as follows:

1-connection base, 101-base section, 102-connection section, 2-moving part, 201-moving section, 202-fixing section, 3-internal cavity, 4-guide ring, 5-limit boss, 6-sealing ring, 7-elastic part, 8-driving part, 9-elastic body, 151-elastic ring and 152-wedge block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, fig. 1 is a schematic structural view of a needle-free connector for back suction according to an embodiment of the present invention; fig. 2 is a cross-sectional view of a withdrawal needleless connector of an embodiment of the present invention; fig. 3 is a schematic perspective view of a wedge ring according to an embodiment of the present invention; fig. 4 is a front view of a wedge ring in an embodiment of the invention.

As shown in fig. 1-2, a withdrawing needleless connector comprises a connection base 1 and a moving member 2; the moving piece is internally sleeved with an elastic body 9; the connection base 1 comprises a base section 101 and a connection section 102, the base section 101 is communicated with an indwelling pipeline system, one end of a moving element 2 is sleeved in the connection section 102, the other end of the moving element is arranged outside the connection end, an internal accommodating cavity 3 is arranged between the moving element 2 sleeved in the connection section 102 and the connection section 102, a moving space is arranged between the moving element 2 and the connection base 1 in the connection section 102, a driving element 8 is arranged at the position corresponding to the moving space and is pressed, the driving element 8 deforms, and the moving element 2 moves towards the direction far away from the connection base 1, so that the size of the internal accommodating cavity 3 between the two is increased, negative pressure is formed in the internal accommodating cavity 3, and blood withdrawal and return inspection is performed through the formed negative pressure. This operation only needs the needleless connector of pumpback self of this patent to accomplish the inspection of pumpback blood, and need not external source apparatus such as external syringe, it is in encapsulated situation all the time to keep somewhere pipe-line system, can not bring the pollution consequently, the patient uses and keeps somewhere the needle safer, simultaneously because the cover is established in the moving member 2 outside in linkage segment 102 still is provided with elastic component 7, when moving member 2 moves towards the direction of keeping away from connection base 1, elastic component 7 is compressed, consequently when the inspection of pumpback blood operation is accomplished, loosen moving member 2, elastic component 7 releases elastic potential energy and replies this moment, thereby make moving member 2 resume to initial condition. It should be noted that the indwelling line system may be an indwelling needle, or may be a combination of an indwelling needle and an indwelling catheter, in order to enable the needle-less connector for back-suction to perform the operation of puncturing and back-blood drawing better.

The setting of driving piece 8 is in activity space department, can overlap and establish the parcel in order to be connected with moving member 2 in the moving member 2 outside, conveniently press, driving piece 8 also can only cover the side of moving member 2, as long as can produce one to moving member 2 and order about the power that moving member 2 removed towards the direction of keeping away from connection base 1 at the in-process of pressing driving piece 8 can, when drive moving member 2 removes towards the direction of keeping away from connection base 1, can make the inside between moving member 2 and the connection base 1 hold 3 increases in volume, thereby produce the negative pressure in holding 3 intracavity, accomplish and take out the blood inspection. It should be particularly noted here that the movement in the direction away from the connection base 1 in this embodiment may be a relative displacement between the connection point of the moving member 2 and the connection base 1, or may be a relative movement generated by elongation of the moving member 2 itself without a relative displacement between the connection point of the moving member 2 and the connection base 1, and both of these two movement manners may increase the volume of the internal cavity 3 and form a certain negative pressure.

The driving member 8 may be a resilient driving member which is pressed to generate a force to the fixing section 202.

In a specific embodiment of the present invention, as shown in fig. 2, the moving member 2 includes a moving section 201 and a fixed section 202; one end of the moving section 201 is sleeved in the connecting section 102, and the other end of the moving section is arranged outside the connecting section 102 and is connected with the fixed section 202 in a sealing manner; pressing the driving part 8 to deform and pushing the fixed section 202 to move towards the direction away from the connection base 101 so as to drive the moving section 201 to move towards the direction away from the connection base 101, thereby forming a negative pressure in the internal cavity 3, and performing a blood withdrawal check through the formed negative pressure.

In an embodiment of the present invention, as shown in fig. 2, a guiding ring 4 is disposed at a junction of the moving section 201 and the connecting section 102, and the moving section 201 and the guiding ring 4 are connected in a clearance fit manner, so that a certain axial relative motion can occur between the moving member 2 and the connecting section 102 without the needle joint.

In a specific embodiment of the utility model, as shown in fig. 2, the cover is established in linkage segment 102 remove section 201 outside circumference and be provided with the seal groove, be provided with sealing washer 6 in the seal groove, sealing washer 6 makes remove section 201 with linkage segment 102 sealing connection. In order to further increase the leakproofness of interior appearance chamber 3, through the seal groove that is provided with sealing washer 6 in seting up of removing section 201 circumference for remove section 201 and linkage segment 102 can be through sealing washer 6 sealing connection, when so pulling and remove section 201 and linkage segment 102 and produce relative motion, interior appearance chamber 3 can guarantee to have better leakproofness when the volume increases, thereby be favorable to the formation of negative pressure, with the inspection of better completion blood of taking out. It should be noted here that the number of the sealing grooves and the sealing rings 6 is not specifically limited, as long as the effect of preventing potential safety hazards and increasing stability can be achieved, and the adaptability can be adjusted according to the length of the moving section 201 or the size of the internal cavity 3, for example, the sealing grooves and the sealing rings 6 are both designed as two double rings.

In a specific embodiment of the utility model, as shown in fig. 2, the cover is established in linkage segment 102 remove the section 201 outside and still be provided with spacing boss 5, spacing boss 5 with be provided with elastic component 7 between the guide ring 4, elastic component 7 cover is established remove the section 201 outside, one end supports spacing boss 5, the other end supports guide ring 4. When the moving member 2 moves continuously in a direction away from the base section 101, the elastic member 7 disposed in the connecting section 102 and sleeved outside the moving section 201 is compressed and deformed due to the bidirectional blocking of the limiting boss 5 and the guide ring 4, and a certain elastic potential energy is gradually stored, and meanwhile, the volume of the internal cavity 3 formed between the moving section 201 and the base section 101 and the connecting section 102 is gradually increased to generate a certain negative pressure, when the moving section 201 stops being pulled, the volume of the internal cavity 3 is not increased, the elastic potential energy of the elastic member 7 is not increased, if the force applied to the moving member 2 is abandoned, that is, the moving member 2 is loosened, the elastic potential energy of the elastic member 7 is released, and under the reverse thrust of the elastic acting force, the moving member 2 moves in a direction close to the base section 101 to reset. Wherein do not specifically limit to the number and the shape of spacing boss 5, can be one, two or more of symmetry, as shown in fig. 2, spacing boss 5 sets up to two, and set up respectively in the both sides that are close to the groove edge of seal groove, of course, spacing boss 5 also can set up in the position of keeping away from seal groove edge, as long as can make elastic component 7 cover establish between spacing boss 5 and guide ring 4, and carry out certain motion in-process elastic component 7 at moving member 2 can have certain elastic potential energy can, can be the rectangle to the specific shape of spacing boss 5, also can be cylindrical etc., as long as can play certain hardness and intensity support and reach same technological effect can.

In a specific embodiment of the present invention, as shown in fig. 3 and 4, the driving member 8 is a wedge ring, the wedge ring includes an elastic ring 151 and a wedge 152, the wedge 152 is circumferentially distributed with a gap therebetween, the elastic ring 151 is connected with all the wedges 152 in series to form a deformable embedded ring structure or a spaced embedded ring structure, the wedge 152 can be uniformly or non-uniformly distributed, the wedge 152 can be directly or indirectly pressed by pressing the elastic ring 151 to drive the wedge 152 to press the connecting member, for example, the wedge 152 can be clamped in the gap of the movable space to directly contact with the connecting member 2 and the connecting base 1, and the wedge 152 is pressed into the movable space, so that the elastic ring 151 is deformed to indirectly act on the connecting member 2 and the connecting base 1, for further optimization, the wedge ring is provided with two wedge faces, the included angle scope between two wedge faces is between 30 to 170, and is preferred, and the included angle of two wedge faces is 90, and the inboard circumference of wedge ring distributes the opening to reduce the deformation resistance, opening quantity is no less than 4, and opening distribution can be evenly distributed also can be non-evenly distributed, and is preferred, and opening must count the 12 that design is circumference evenly distributed. The outer edge of the wedge-shaped ring can be set to be a regular polygon, the contact area with fingers can be increased, pressing is convenient, and the outer edge of the wedge-shaped ring is a rough surface and can be serrated grains or other grains. It should be noted that the driving member 8 may have other configurations as long as the same technical effect can be achieved.

To sum up, the utility model discloses a needleless connector of pumpback has increased the blood of drawing back and has examined the function on the basis that does not influence its original function, follows the whole life cycle of keeping somewhere the needle, practices thrift the relevant expense of keeping somewhere the needle nursing, and convenient operation draws back the blood and examines the in-process, keeps somewhere pipe-line system and is in the encapsulated situation all the time, can not consequently bring the pollution, and the patient uses to keep somewhere the needle safer.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pumpback needleless connector is characterized by comprising a connecting base and a moving piece;

2. The withdrawal needleless connector of claim 1, wherein the moving member comprises a moving section and a fixed section; one end of the moving section is sleeved in the connecting section, and the other end of the moving section is arranged outside the connecting section and is in sealing connection with the fixed section;

3. The withdrawal needleless connector of claim 2, wherein the actuating member is a resilient actuating member that is depressed to exert a force on the anchor portion.

4. The needle-free withdrawal connector according to claim 3, wherein a guide ring is arranged at the joint of the moving section and the connecting section, and the moving section is in clearance fit connection with the guide ring.

5. The needle-free withdrawal connector according to claim 4, wherein a limiting boss is further arranged outside the moving section sleeved in the connecting section, the elastic member is arranged between the limiting boss and the guide ring, the elastic member is sleeved outside the moving section, one end of the elastic member abuts against the limiting boss, and the other end of the elastic member abuts against the guide ring.

6. The needle-free retractable connector as claimed in claim 5, wherein a sealing groove is circumferentially formed on an outer side of the movable section sleeved in the connecting section, and a sealing ring is arranged in the sealing groove, so that the movable section and the connecting section are in sealing connection.