CN102698340A - Disposable transfusion needle - Google Patents

Abstract

A disposable transfusion needle comprises a needle tube and a needle handle arranged at the rear part of the needle tube and is characterized in that a limiting structure which acts on a puncturing type connecting piece of an indwelling device and limits the needle handle to do lateral movement relative to the puncturing type connecting piece of the indwelling device is arranged on the needle handle. The disposable transfusion needle and the end surface of the puncturing type connecting piece of the indwelling device are in abut joint to form a whole, breakage force acting on the transfusion needle can be lowered or eliminated when the limbs of a patient or a transfusion device moves, so that the occurrence of breakage phenomenon of the needle tube can be effectively reduced.

Description

The disposable infusion pin

Technical field

The present invention relates to medical instruments field, be specifically related to a kind of disposable venous infusion needle, this disposable venous infusion needle is particularly suitable for being connected with indwelling devices such as remaining needle, central venous catheters and is used.

Background technology

Venoclysis needle, it mainly acts on is that the puncture vein is set up the transfusion path, supporting infusion utensil is used to carry out transfusion and blood transfusion.Existing venoclysis needle is made up of needle tubing, needle handle, conduit and Connection Block; The front end of said needle tubing is the angle pin hole, establishes needle handle on the syringe rear end, and needle tubing passes needle handle and is connected with an end of conduit; Establish Connection Block on the conduit other end, Connection Block is used for being connected with transfusion device; Said needle handle mainly contains two kinds of single-blade and double-vanes, and it is located at the needle tubing rear portion, and effect is to be convenient to the nurse to hold pin and puncture.

In the actual clinical transfusion; Regular meeting uses remaining needle, central venous catheter etc. and keeps somewhere device; Promptly in patient's vein, inserted remaining needle, central venous catheter etc. in advance and kept somewhere device, when needs are infused, as long astransfusion needle 1 puncture is connected on thepuncture type connector 2 of keeping somewhere device; Shown in accompanyingdrawing 1, adhesive tape is fixed then.Existingtransfusion needle 1 is with after thepuncture type connector 2 of keeping somewhere device docks; Do not have special position limiting structure to position, promptly transfusion needle reliably is not positioned to keep somewhere on thepuncture type connector 2 of device, even use adhesive tape fixedlytransfusion needle 1 and thepuncture type connector 2 of keeping somewhere device; Though limited their both axial separation; But still can do independently lateral movement between the two, when the flexible pipe burst of transfusion device was moved, the needle tubing root oftransfusion needle 1 promptly can receive a breaking force

(seeing shown in the arrow in the accompanying drawing 1) is prone to the bent needle situation.

Summary of the invention

The purpose of this invention is to provide a kind of disposable infusion pin, the location is unreliable when being connected with the puncture type connector of keeping somewhere device to solve existing transfusion needle, is prone to the problem of bent needle situation.

In order to solve these problems of the prior art; Technical scheme provided by the invention is: the disposable infusion pin; The needle handle that comprises needle tubing and be arranged at the needle tubing rear portion; Said needle handle is provided with and acts on the puncture type connector of keeping somewhere device, and the puncture type connector that the restriction needle handle is kept somewhere device is relatively made the position limiting structure of lateral movement.

Technique scheme has following explanation and variation:

1, in the such scheme; In said " needle handle is provided with and acts on the puncture type connector of keeping somewhere device; the restriction needle handle is kept somewhere the position limiting structure that device puncture type connector is done lateral movement relatively ", said " lateral movement " is meant the motion on the direction that axially intersects with needle tubing.Specifically " position limiting structure " can be that extended integrative-structure also can be independent structures or both composite construction that is assemblied on the needle handle on the needle handle.Said " position limiting structure " comprises following scheme:

A. said position limiting structure comprise a abutment face that needle handle is provided with towards the puncture type connector of keeping somewhere device or out-of-line at least three against point, this abutment face or out-of-line at least three against point needle tubing axially on the end face of the puncture type connector of keeping somewhere device or its end-face against cooperating.

B, said position limiting structure by one on the needle handle axially against point and at least three side direction against forming, perhaps said position limiting structure by two on the needle handle axial against point and with these two axially against point not at grade at least two side direction against forming; Axially against along needle tubing axially with the puncture type connector end face of indwelling device or its end-face against cooperating; And side direction upwards is uniformly distributed with in the week of needle tubing against point, and needle tubing directly upwards with the puncture type connector of keeping somewhere device against cooperates or with the puncture type connector of indwelling device on end-face against cooperating.

In above-mentioned a, the b scheme, said " with the end face of the puncture type connector of keeping somewhere device or its end-face against cooperating " in " its end-face " be meant the covering of peripheral hardware on the puncture type connector end face of indwelling device, such as sheath etc.

Concrete scheme has: said position limiting structure be on the needle handle towards a capping structure of the puncture type connector end face of keeping somewhere device, this capping structure constitutes perpendicular to an axial abutment face of needle tubing and a circle chimb of this abutment face periphery forward end projection by one; The size of said capping structure is complementary with puncture type connector end or its end covering size of keeping somewhere device; And capping structure is used for cutting ferrule in puncture type connector end or its end covering of keeping somewhere device; Its abutment face leans with puncture type connector end face or its end covering of keeping somewhere device, the inner surface of one of which circle chimb and the obducent outer peripheral face in puncture type connector end or its end of keeping somewhere device against.

2, in the such scheme, said needle handle is provided with the latching structure that the restriction needle handle breaks away from the puncture type connector of keeping somewhere device vertically.The latching structure that said needle handle is provided with is that the extended integrative-structure of needle handle also can be independent structures or both composite construction that is assemblied on the needle handle.

Concrete this latching structure can be hook structure, draw-in groove structure, the rope of tying tight or strip fixing band, elasticity folder, snap close, buckle etc.Concrete scheme is: a plurality of grabs that said latching structure is stretched out forward by a support portion and support portion are formed, and said support portion is located on the needle handle, and the axle center of a plurality of grabs cast-over pipe on the support portion is uniformly distributed with, and establish hook portion on its elongated end forward; The hook portion formation one of a plurality of grabs acts on the claw of the puncture type connector of keeping somewhere device.

Further again: said grab be about two, establish said hook portion in the front end of this two grab, and center and support portion are connected to form fulcrum, and the rear end of two grabs extends back as release lever also.

Further again: the support portion center drilling of said latching structure, support portion slide with this hole and are set on the said needle handle; Effect has elastic component between said support portion and needle handle, and the active force of this flexible member forces the relative support portion of needle handle towards nose motion, and position limiting structure is acted on the puncture type connector of keeping somewhere device.

3, in the such scheme, the elongated end forward of said grab surpasses the front end of needle tubing, and perhaps grab is provided with an annular flap around the distribution of needle tubing front end, around the front end (being needle point) that blocks needle tubing, plays the effect of anti-error acupuncture with this.

4, in the such scheme, also wear on the said needle tubing and be provided with a puncture type connector sheath, the opening of this puncture type connector sheath is towards front end, and its inner chamber is complementary with the end of the puncture type connector of keeping somewhere device; After needle tubing was extracted from the puncture type connector of keeping somewhere device, puncture type connector sheath can continue to keep somewhere and is covered on the puncture type connector, was polluted by microorganism and other harmful substances with the end face of the puncture type connector of avoiding keeping somewhere device.

Than solution of the prior art, advantage of the present invention is:

1. because being provided with, disposable infusion needle of the present invention limits the position limiting structure that its puncture type connector of keeping somewhere device is relatively done shifted laterally; Can with disposable infusion needle of the present invention and the end face of keeping somewhere the puncture type connector of device offset be connected as a whole; Patient's limbs are moved or infusion set reduces when moving or eliminates breaking force effect suffered on the transfusion needle, thereby effectively reduce the fracture generation of phenomenon of needle tubing.

2. because disposable infusion needle of the present invention also is provided with the latching structure that the restriction needle handle breaks away from the puncture type connector of keeping somewhere device vertically; More effectively disposable infusion needle and the puncture type connector of keeping somewhere device are linked into an integrated entity, thereby avoid the fracture generation of phenomenon of needle tubing.

3. because disposable infusion needle of the present invention is provided with puncture type connector sheath; When transfusion needle connects the puncture type connector of keeping somewhere device; Puncture type connector sheath can be placed on the puncture type connector end face of keeping somewhere device; When transfusion, play the effect of insulation blocking puncture face, avoid taking place in the infusion process microbial contamination; And when transfusion end back transfusion needle separates with the puncture type connector of keeping somewhere device; Because puncture type connector sheath is to wear to be connected with transfusion needle; The frictional force that after transfusion needle is extracted, is connected with transfusion needle owing to puncture type connector sheath is less than the frictional force between the puncture type connector of puncture type connector sheath and indwelling device; Transfusion needle is extracted as a result; Puncture type connector sheath can be stayed and keep somewhere on the device end, keeps somewhere the puncture type connector end of device with protection and avoids being polluted by microorganism and other harmful substances.

4. because the grab of the present invention end of extending forward surpasses the front end of needle tubing, or said grab be provided with an annular flap around the needle tubing front end, played anti-acupuncture effect.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Accompanyingdrawing 1 is the stressed sketch map of the transfusion device of prior art when being connected with the puncture type connector of keeping somewhere device;

Accompanyingdrawing 2 is the structural representation of the embodiment of the invention one;

Accompanyingdrawing 3 is that the embodiment of the invention one is assembled the sketch map after being connected with the puncture type connector of keeping somewhere device;

Accompanyingdrawing 4 is the structural representation of the embodiment of the invention two;

Accompanyingdrawing 5 is that the embodiment of the invention two is assembled the sketch map after being connected with the puncture type connector of keeping somewhere device;

Accompanyingdrawing 6 is the structural representation of the embodiment of the invention three;

Accompanyingdrawing 7 is the structural representation of the embodiment of the invention four;

Accompanyingdrawing 8 is the structural representation of the embodiment of the invention five;

Accompanyingdrawing 9 is the overall structure sketch map of the embodiment of the invention six;

Accompanyingdrawing 10 is the transfusion needle major part profile sketch map of the embodiment of the invention six;

Accompanyingdrawing 11 is the embodiment of the invention six and the assembling process sketch map of keeping somewhere the puncture type connector of device;

Accompanyingdrawing 12 is the structural representation of the embodiment of the invention seven.

Wherein: 1, existing transfusion needle; 2, the puncture type connector of keeping somewhere device; 3, needle tubing; 4, needle handle; 5, conduit; 6, abutment face; 7, the puncture type connector of keeping somewhere device; 8, capping structure; 9, abutment face; 10, chimb; 11, puncture type connector sheath; 12, anti-skidding wire projection or spot-like projections; 13, Connection Block; 14, support portion; 15, grab; 16, hook portion; 17, liquid medicine filter; 18, flow regulator; 19, release lever; 20, stage clip; 21, flap.

The specific embodiment

Embodiment one: shown in accompanyingdrawing 2～3,

The disposable infusion pin is made up ofneedle tubing 3, theconduit 5 that is fixedly arranged on suit onneedle handle 4 onneedle tubing 3 rearward end, theneedle handle 4 and theconduit 5 terminal Connection Blocks that connect.

Saidneedle handle 4 is provided with and acts on thepuncture type connector 7 of keeping somewhere device, and thepuncture type connectors 7 thatrestriction needle handle 4 is kept somewhere devices are relatively made the position limiting structure of lateral movement.Concrete this position limiting structure is anabutment face 6 that is provided with towards the puncture type connector of keeping somewheredevice 7 onneedle handle 4 front ends.After present embodiment transfusion needle and 7 assemblings of the puncture type connector of keeping somewhere device, saidabutment face 6 leans with the end face of thepuncture type connector 7 of keeping somewhere device on axially atneedle tubing 3 and cooperates, and sees shown in the accompanying drawing 3.In order to increase steadiness, the area that abutmentface 6 can design ground is bigger, even greater than the end face of keeping somewhere devicepuncture type connector 7.

Above-mentionedabutment face 6 is a plane; This is for illustrating; If not a plane, and only be out-of-line at least three against point, these at least three against point needle tubing axially on the end face of thepuncture type connector 7 of keeping somewhere device against cooperating; Also can play the effect identical withabutment face 6, this variation is also contained in the present embodiment.

Embodiment two: shown in accompanyingdrawing 4～5,

The disposable infusion pin is made up of theconduit 5 and theconduit 5 terminal Connection Blocks that connect of suit onneedle tubing 3, theneedle handle 4 that is fixedly arranged onneedle tubing 3 rear portions, theneedle handle 4.

Saidneedle handle 4 is provided with and acts on thepuncture type connector 7 of keeping somewhere device, and thepuncture type connectors 7 thatrestriction needle handle 4 is kept somewhere devices are relatively made the position limiting structure of lateral movement.Concrete this position limiting structure be on theneedle handle 4 towards acapping structure 8 ofpuncture type connector 7 end faces of keeping somewhere device, thiscapping structure 8 constitutes perpendicular to anaxial abutment face 9 ofneedle tubing 3 and acircle chimb 10 of thisabutment face 9 periphery forward end projections by one; The size of saidcapping structure 8 is complementary with the end size of thepuncture type connector 7 of keeping somewhere device; Andcapping structure 8 is used for the end of cutting ferrule in thepuncture type connector 7 of keeping somewhere device; Itsabutment face 9 leans with the end face of thepuncture type connector 7 of keeping somewhere device; The outer peripheral face of the inner surface of one of whichcircle chimb 10 and the end of thepuncture type connector 7 of keeping somewhere device against, shown in accompanyingdrawing 5.

Above-mentioned position limiting structure is thatcapping structure 8 is for illustrating;Capping structure 8 can be simplified in the reality; Asabutment face 9 can be reduced to one axial against point, and acircle chimb 10 can be reduced at least three side direction against point, promptly said position limiting structure by one on the needle handle axially against point and at least three side direction against forming; Axially against along needle tubing axially with the end face of keeping somewhere device against cooperating, and at least three side direction upwards are uniformly distributed with in the week of needle tubing against putting.Certainly, be uniformly distributed with to the most reasonably distributing, distributed points is suitably adjusted on the basis that guarantees point of safes, and this variation is also contained in the present embodiment.Such design also can reachrestriction needle handle 4 basically and keep somewhere the effect that devicepuncture type connector 7 is done lateral movement relatively, is included within the present embodiment so change.For another example,abutment face 9 can be reduced to two axial against point or straight line, and acircle chimb 10 can be reduced to two axial at grade at least two side direction are not against point against point, and at least two side direction upwards are uniformly distributed with in the week of needle tubing against point.Certainly, be uniformly distributed with to the most reasonably distributing, distributed points is suitably adjusted on the basis that guarantees point of safes, and this variation is also contained in the present embodiment.In this example, axially be in orthogonal plane for the most reasonable against point against point and side direction.Such design also can reachrestriction needle handle 4 basically and keep somewhere the effect that devicepuncture type connector 7 is done lateral movement relatively, is included within the present embodiment so change.

Embodiment three: shown in accompanyingdrawing 6,

The disposable infusion pin is made up ofneedle tubing 3, theconduit 5 that is fixedly arranged on suit onneedle handle 4 onneedle tubing 3 rearward end, theneedle handle 4 and theconduit 5 terminal Connection Blocks that connect.Be with the difference of embodiment two: also wear on the saidneedle tubing 3 and be provided with a puncturetype connector sheath 11, the opening of this puncturetype connector sheath 11 is towards front end, and inner chamber is complementary with the end of thepuncture type connector 7 of keeping somewhere device; Position limiting structure and puncturetype connector sheath 11 outer walls are against cooperating.After needle tubing was extracted from thepuncture type connector 7 of keeping somewhere device, puncturetype connector sheath 11 can continue to keep somewhere on thepuncture type connector 7 that is covered in the indwelling device.Puncturetype connector sheath 11 inner side also can be provided with anti-skidding wire projection or spot-like projections 12, with the frictional force of 7 of the puncture type connectors that increase puncturetype connector sheath 11 and indwelling device.When transfusion needle connected thepuncture type connector 7 of keeping somewhere device, puncturetype connector sheath 11 can be placed onpuncture type connector 7 end faces of keeping somewhere device, when transfusion, played the effect of insulation blocking puncture face, avoided taking place in the infusion process microbial contamination; And when transfusion end back transfusion needle separates with thepuncture type connector 7 of keeping somewhere device; Because puncturetype connector sheath 11 is to wear to be connected with transfusion needle; Transfusion needle extract the back since the frictional force that is connected with transfusion needle of puncturetype connector sheath 11 less than the frictional force of 7 of the puncture type connectors of puncturetype connector sheath 11 and indwelling device; Transfusion needle is extracted as a result; Puncturetype connector sheath 11 still can be stayed onpuncture type connector 7 ends of keeping somewhere device, keeps somewherepuncture type connector 7 ends of device with protection and avoids being polluted by microorganism and other harmful substances.The end of present embodiment position limiting structure and puncturetype connector sheath 11 and end periphery are against cooperating onset.

Other repeat no more with embodiment two here.

Embodiment four: shown in accompanyingdrawing 7,

The disposable infusion pin is made up of theconduit 5 and theconduit 5terminal Connection Blocks 13 that connect of suit onneedle tubing 3, theneedle handle 4 that is fixedly arranged onneedle tubing 3 rear portions, theneedle handle 4.

Saidneedle handle 4 is provided with thepuncture type connector 7 that acting on of one or non-one kept somewhere device, and thepuncture type connectors 7 thatrestriction needle handle 4 is kept somewhere devices are relatively made the position limiting structure of lateral movement.Concrete this position limiting structure is thatneedle handle 4 front ends have towards keeping somewhere theabutment face 6 that device is provided with; After present embodiment transfusion needle and 7 assemblings of the puncture type connector of keeping somewhere device, saidabutment face 6 leans with the end face of thepuncture type connector 7 of keeping somewhere device on axially atneedle tubing 3 and cooperates.

And, also be provided with the latching structure that the restriction needle handle breaks away from the puncture type connector of keeping somewhere device vertically on the said needle handle.This latching structure is specifically as shown in Figure 7; Twograbs 15 by stretching out forward on asupport portion 14 and thesupport portion 14 are formed; Saidsupport portion 14 is fixedly arranged on theneedle handle 4 or is connected withneedle handle 4 one; The axle center of twograbs 15 cast-over pipe on the support portion is uniformly distributed with; And thehook portion 16 of establishinghook portion 16, twograbs 15 on the elongated end forward of each grab constitute one act on thepuncture type connector 7 of keeping somewhere device claw, promptly when transfusion needle with after thepuncture type connector 7 of indwelling device combines; Thehook portion 16 of twograbs 15 is hooked on thepuncture type connector 7 of keeping somewhere device, reaches the locking action thatrestriction needle handle 4 breaks away from thepuncture type connector 7 of keeping somewhere device vertically relatively with this.

The quantity of above-mentionedgrab 15 is at least two for illustrating in the reality, certain better more than two, for example three, four.

Above-mentioned latching structure is exemplified as hook structure; Latching structure also can be strap configurations in the reality; As afterpuncture type connector 7 end faces and theabutment face 6 of keeping somewhere device lean; Can between thepuncture type connector 7 ofneedle handle 4 and indwelling device, bind fixing band, limitneedle handle 4 with the fixed mode of bandage and break away from thepuncture type connector 7 of keeping somewhere device vertically relatively.Certainly, bandage is if adopt adhesive tape more convenient.

In reality; The implementation of latching structure also has a lot, like various elasticity buckle structures, clamp structure etc., under the inspiration of above-mentioned hook structure; Those skilled in the art also can associate the variation of various latching structures, and these variations include within present embodiment.

Embodiment five: shown in accompanying drawing 8,

The disposable infusion pin is made up of theconduit 5 and theconduit 5 terminal Connection Blocks 13 that connect of suit onneedle tubing 3, the needle handle 4 that is fixedly arranged onneedle tubing 3 rear portions, the needle handle 4.Be with the difference of embodiment four: the end that said twograbs 15 extend forward surpasses the front end (being needle point) ofneedle tubing 3, promptly with the needle point of two grabs, 15protection needle tubings 3, is prone to the danger that the quilt mistake is bumped acupuncture to eliminate needle point.Said grab 15 quantity or width are adjusted according to practical situation, make his slit around the needle point can not be through people's finger, and these variations include within present embodiment.

Also wear on the saidneedle tubing 3 and be provided with a puncturetype connector sheath 11, the opening of this puncture type connectorspare sheath 11 is towards front end, and the end of its inner chamber and puncture type connector is complementary; Position limiting structure and puncture type connector sheath outer wall are against cooperating.After needle tubing was extracted from thepuncture type connector 7 of keeping somewhere device, puncturetype connector sheath 11 can continue to keep somewhere on thepuncture type connector 7 that is covered in the indwelling device.And, also be provided with liquid medicine filter 17 and flow regulator 18 on theconduit 5.

Other repeats no more with embodiment four here.

Embodiment six: shown in accompanying drawing 9～11,

The disposable infusion pin is made up of theconduit 5 and theconduit 5 terminal Connection Blocks 13 that connect of suit onneedle tubing 3, the needle handle 4 that is fixedly arranged onneedle tubing 3 rear portions, theneedle handle 4.

Said needle handle 4 is provided with and acts on the puncture type connector 7 of keeping somewhere device, and the puncture type connectors 7 that restriction needle handle 4 is kept somewhere devices are relatively made the position limiting structure of lateral movement.Concrete this position limiting structure be on the needle handle 4 towards a capping structure 8 of puncture type connector 7 end faces of keeping somewhere device, this capping structure 8 constitutes perpendicular to an axial abutment face 9 of needle tubing 3 and a circle chimb 10 of this abutment face 9 periphery forward end projections by one.On said needle tubing 3, also wear and be provided with a puncture type connector sheath 11; The opening of this puncture type connector sheath 11 is towards front end; The end of its inner chamber and puncture type connector 7 is complementary; And the size of puncture type connector sheath 11 rearward end and capping structure 8 is complementary, and is resisted against on the abutment face 9 but make in the rear end insert cover cap 8 of puncture type connector sheath 11.Promptly when using; The abutment face 9 of capping structure 8 leans through puncture type connector sheath 11 end face with the puncture type connector 7 of keeping somewhere device, the inner surface of a circle chimb 10 of capping structure 8 through the outer peripheral face of puncture type connector sheath 11 and the end of keeping somewhere device puncture type connector 7 against.After needle tubing 3 was extracted from indwelling device puncture type connector 7, puncture type connector sheath 11 can continue to keep somewhere to be covered in to be kept somewhere on the device puncture type connector 7.The inner side of puncture type connector sheath 11 is provided with anti-skidding wire projection or spot-like projections 12, to increase frictional force.

And; Also be provided with the latching structure that restriction needle handle 4 breaks away from thepuncture type connector 7 of keeping somewhere device vertically on the saidneedle handle 4, this latching structure specifically is made up of twograbs 15 on asupport portion 14 and thesupport portion 14, saidsupport portion 14 center drillings; Slide with this hole and be set on the said needle handle 4 insupport portion 14; The extreme position that on the needle handle 4 slide incorresponding support portion 14 is provided with the spacing preiection structure, in case needle handle 4 is thrown off withsupport portion 14 mutually, specifically this spacing preiection structure is unidirectional lobe; Needle handle 4 can only be swung to get in 14 center drillings of support portion, needle handle 4 can not withdraw from after assembling.

The axle center of twograbs 15 cast-overpipe 3 on the support portion is uniformly distributed with; And the front end of eachgrab 15 extends forward and stretches out; Establishhook portion 16 on its elongated end forward, and the middle part of eachgrab 15 andsupport portion 14 are connected to form fulcrum, and the rear end of twograbs 15 extends back also as release lever 19.Hook portion 16 formations one of twograbs 15 act on the claw of thepuncture type connector 7 of keeping somewhere device; Promptly when transfusion needle with after thepuncture type connector 7 of keeping somewhere device combines; Thehook portion 16 of twograbs 15 is hooked on thepuncture type connector 7 of keeping somewhere device, reaches the locking action that restriction needle handle 4 breaks away from thepuncture type connector 7 of keeping somewhere device vertically relatively with this.And when wanting release; As long asrelease lever 19 with twograb 15 rear ends of two finger extruding; The front end of twograbs 15 is opened, make thehook portion 16 of twograbs 15 be separated from thepuncture type connector 7 of keeping somewhere device, thereby thepuncture type connector 7 of keeping somewhere device can be deviate from easily from claw.

And; Betweensupport portion 14 andcapping structure 8, also be arranged with a flexible member on the saidneedle handle 4; This flexible member is specially a stage clip 20; Can only swing to the unidirectional lobe that gets intosupport portion 14 center drillings because needle handle 4 sidewalls are provided with, and the position limiting structure width is greater thansupport portion 14 center drilling diameters, needle handle 4 can not withdraw from after assembling; Force needle handle 4 (being capping structure 8) towardsnose motion sheath 11 cutting ferrules on thepuncture type connector 7 of cappingstructure 8 and indwelling device to be cooperated insupport portion 14 relatively at the active force of this stage clip 20 like this.This design can be connected this instance transfusion needle reliably with thepuncture type connector 7 of the indwelling device of different size, avoids too tightly or too pine of this instance transfusion needle and the puncture type connector of keeping somewheredevice 7 assembling ground.

Respectively be provided with anannular flap 21 on the front end of said twograbs 15, this twoannular flap 21 is on the same circular trace, and distributes around the needle point ofneedle tubing 3 front ends.Twograbs 15 and twoannular flaps 21 surround the needle point ofneedle tubing 3 front ends and protect, and make personnel can not bump needle point by mistake and stab.

Present embodiment transfusion needle and the assembling and the separation process of keeping somewhere the puncture type connector 7 of device are seen shown in the accompanying drawing 11.(a) figure expression in the accompanying drawing 11 can be punctured the present embodiment transfusion needle on the puncture type connector 7 of keeping somewhere device in the direction of arrows.(b) figure expression in the accompanying drawing 11 is connected in the puncture of present embodiment transfusion needle on the puncture type connector 7 of keeping somewhere device; Puncture type connector sheath 11 is placed in puncture type connector 7 ends of keeping somewhere device; Capping structure 8 reliably through puncture type connector sheath cutting ferrule on the end of the puncture type connector 7 of keeping somewhere device, successfully limit needle handle and keep somewhere device puncture type connector 7 relatively and do lateral movement.And the hook portion 16 of the grab 15 in the latching structure is hooked on the puncture type connector 7 of keeping somewhere device, thereby the present embodiment transfusion needle firmly is locked on the puncture type connector 7 of keeping somewhere device, links into an integrated entity with the puncture type connector spare 7 of keeping somewhere device.If want release, need push release lever 19 by the arrow side among the figure at present.After (c) figure in the accompanying drawing 11 representes that having pushed release lever 19 opens two grab front ends; And the present embodiment transfusion needle pulled up from the puncture type connector 7 of keeping somewhere device; And puncture type connector sheath 11 is continued to keep somewhere on the end that is covered in the puncture type connector 7 of keeping somewhere device, and protection is continued in the end of the puncture type connector 7 of keeping somewhere device.

Embodiment seven: shown in accompanying drawing 12,

The disposable infusion pin is made up of theconduit 5 and theconduit 5 terminal Connection Blocks that connect of suit onneedle tubing 3, the needle handle 4 that is fixedly arranged onneedle tubing 3 rear portions, theneedle handle 4.

Said needle handle 4 is provided with and acts on thepuncture type connector 7 of keeping somewhere device, and thepuncture type connectors 7 that restriction needle handle 4 is kept somewhere devices are relatively made the position limiting structure of lateral movement.Concrete this position limiting structure is anabutment face 6 that is provided with towards the puncture type connector of keeping somewheredevice 7 onneedle handle 4 front ends.

And; Also wear on the saidneedle tubing 3 and be provided with a puncturetype connector sheath 11; The opening of this puncturetype connector sheath 11 is towards front end, and the end of its inner chamber and puncturetype connector 7 is complementary, and the rear end face of puncturetype connector sheath 11 is resisted against on the saidabutment face 6.

After present embodiment transfusion needle and 7 assemblings of the puncture type connector of keeping somewhere device, saidabutment face 6 leans through the end of puncturetype connector sheath 11 and thepuncture type connector 7 of keeping somewhere device on axially atneedle tubing 3 and reaches localized effect.In order to increase steadiness,abutment face 6 programmable areas are bigger.Afterneedle tubing 3 was extracted from indwelling devicepuncture type connector 7, puncturetype connector sheath 11 can continue to keep somewhere on thepuncture type connector 7 that is covered in the indwelling device.The inner side of puncturetype connector sheath 11 is provided with anti-skidding wire projection or spot-like projections 12, to increase frictional force.

And; Also be provided with the latching structure that restriction needle handle 4 breaks away from the puncture type connector 7 of keeping somewhere device vertically on the said needle handle 4; This latching structure specifically is made up of two grabs 15 on a support portion 14 and the support portion 14; Said support portion 14 and needle handle 4 are for one is fixedly connected, and the anterior end surface of support portion 14 is promptly as said abutment face 6.The axle center of two grabs 15 cast-over pipe 3 on support portion 14 is uniformly distributed with; And the front end of each grab 15 extends forward and stretches out; Establish hook portion 16 on its elongated end forward, and the middle part of each grab 15 and support portion 14 are connected to form fulcrum, and the rear end of two grabs 15 extends back also as release lever 19.Hook portion 16 formations one of two grabs 15 act on the claw of the puncture type connector 7 of keeping somewhere device; Promptly when transfusion needle with after the puncture type connector 7 of keeping somewhere device combines; The hook portion 16 of two grabs 15 is hooked on the puncture type connector 7 of keeping somewhere device, reaches the locking action that restriction needle handle 4 breaks away from the puncture type connector 7 of keeping somewhere device vertically relatively with this.And when wanting release; As long as release lever 19 with two grab 15 rear ends of two finger extruding; The front end of two grabs 15 is opened; Make the barb grab 16 of two grabs 15 be separated from the puncture type connector 7 of keeping somewhere device, thereby the puncture type connector 7 of keeping somewhere device can be deviate from easily from claw.

Respectively be provided with anannular flap 21 on the front end of said twograbs 15, this twoannular flap 21 is on the same circular trace, and distributes around the needle point ofneedle tubing 3 front ends.Twograbs 15 and twoannular flaps 21 surround the needle point ofneedle tubing 3 front ends and protect, and make people can not bump needle point more by mistake and stab.

Above-mentioned instance only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalent transformations that spirit is done according to the present invention or modification all should be encompassed within protection scope of the present invention.

Claims (10)

1. disposable infusion pin; The needle handle that comprises needle tubing and be arranged at the needle tubing rear portion; It is characterized in that: said needle handle is provided with and acts on the puncture type connector of keeping somewhere device, and the puncture type connector that the restriction needle handle is kept somewhere device is relatively made the position limiting structure of lateral movement.

2. disposable infusion pin according to claim 1; It is characterized in that: said position limiting structure comprise a abutment face that needle handle is provided with towards the puncture type connector of keeping somewhere device or out-of-line at least three against point, this abutment face or out-of-line at least three against point needle tubing axially on the puncture type connector end face of keeping somewhere device or its end-face against cooperating.

3. disposable infusion pin according to claim 2; It is characterized in that: said position limiting structure be on the needle handle towards a capping structure of the puncture type connector end face of keeping somewhere device, this capping structure constitutes perpendicular to an axial abutment face of needle tubing and a circle chimb of this abutment face periphery forward end projection by one; The size of said capping structure is complementary with puncture type connector end or its end covering size of keeping somewhere device; And capping structure is used for cutting ferrule in puncture type connector end or its end covering of keeping somewhere device; Its abutment face leans with puncture type connector end face or its end covering of keeping somewhere device, the inner surface of one of which circle chimb and the obducent outer peripheral face in puncture type connector end or its end of keeping somewhere device against.

4. disposable infusion pin according to claim 1; It is characterized in that: said position limiting structure by one on the needle handle axially against point and at least three side direction against forming, perhaps said position limiting structure by two on the needle handle axial against point and with these two axially against point not at grade at least two side direction against forming; Axially against along needle tubing axially with the puncture type connector end face of indwelling device or its end-face against cooperating; And side direction upwards is uniformly distributed with in the week of needle tubing against point, and needle tubing directly upwards with the puncture type connector of keeping somewhere device against cooperates or with the puncture type connector of indwelling device on end-face against cooperating.

5. according to each described disposable infusion pin among the claim 1-4, it is characterized in that: said needle handle is provided with the latching structure that the restriction needle handle breaks away from the puncture type connector of keeping somewhere device vertically.

6. disposable infusion pin according to claim 5; It is characterized in that: a plurality of grabs that said latching structure is stretched out forward by a support portion and support portion are formed; Said support portion is located on the needle handle; The axle center of a plurality of grabs cast-over pipe on the support portion is uniformly distributed with, and establishes hook portion on its elongated end forward; The hook portion formation one of a plurality of grabs acts on the claw of the puncture type connector of keeping somewhere device.

7. disposable infusion pin according to claim 6; It is characterized in that: said grab be about two; Establish said hook portion in the front end of this two grab, and center and support portion are connected to form fulcrum, and the rear end of two grabs extends back as release lever also.

8. disposable infusion pin according to claim 7 is characterized in that: the support portion center drilling of said latching structure, support portion slide with this hole and are set on the said needle handle; Effect has elastic component between said support portion and needle handle, and the active force of this flexible member forces the relative support portion of needle handle towards nose motion, and position limiting structure is acted on the puncture type connector of keeping somewhere device.

9. disposable infusion pin according to claim 6 is characterized in that: the elongated end forward of said grab surpasses the front end of needle tubing, and perhaps grab is provided with an annular flap around the distribution of needle tubing front end.

10. according to each described disposable infusion pin among the claim 1-4; It is characterized in that: also wear on the said needle tubing and be provided with a puncture type connector sheath; The opening of this puncture type connector sheath is towards front end, and its inner chamber is complementary with the end of the puncture type connector of keeping somewhere device; After needle tubing was extracted from the puncture type connector of keeping somewhere device, puncture type connector sheath can continue indwelling and be covered on the puncture type connector.

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