CN209004890U - Release mechanism and safe type retention needle for remaining needle - Google Patents

Abstract

The utility model relates to a kind of release mechanisms and safe type retention needle for remaining needle, the release mechanism for remaining needle includes attachment base, first baffle and anti-stab elastic component, the attachment base with the catheter block of remaining needle for connecting, the attachment base is equipped with the first puncturing hole passed through for the puncture needle tubing for remaining needle, first puncturing hole is used to be pierced by orifice with the needle tubing of catheter block, the first baffle is equipped with the second puncturing hole passed through for the puncture needle tubing for remaining needle, the anti-stab elastic component is arranged between the attachment base and the first baffle, and the both ends of the anti-stab elastic component respectively with the attachment base, first baffle connection.This, which is used for the release mechanism of remaining needle and safe type retention needle, can prevent puncture needle tubing to be excessively pierced into human body, protect patient from unexpectedly injuring.

Description

Release mechanism and safe type retention needle for remaining needle

Technical field

The utility model relates to the field of medical instrument technology, more particularly to a kind of release mechanism and peace for remaining needle Holotype remaining needle.

Background technique

Remaining needle is a kind of for repeatedly carrying out the medical instrument of infusion treatment within a certain period of time, generally comprises puncture Needle and cover the indwelling tube on puncture needle.Indwelling tube is soft and flexible, when indwelling tube indwelling is in blood vessel, indwelling tube meeting With blood vessel synchronous zigzag, so that the position of indwelling tube indwelling still can freely act, the danger for puncturing vein is not had.Traditional Remaining needle, in puncture process, since the carelessness of medical staff is easy that the too long of pin puncture will be punctured, so that patient be made to be anticipated Outer injury, causes security risk.

Utility model content

Based on this, it is necessary to provide a kind of release mechanism and safe type retention needle for remaining needle, this is used for remaining needle Release mechanism and safe type retention needle can prevent puncture needle tubing be excessively pierced into human body, protect patient from unexpectedly injuring.

Its technical solution is as follows:

A kind of release mechanism for remaining needle, including attachment base, first baffle and anti-stab elastic component, the attachment base are used It is connect in the catheter block with remaining needle, the attachment base is equipped with first passed through for the puncture needle tubing for remaining needle and punctures Hole, first puncturing hole are used to be pierced by orifice with the needle tubing of catheter block, and the first baffle is equipped with for for indwelling The second puncturing hole that the puncture needle tubing of needle passes through, the anti-stab elastic component setting the attachment base and the first baffle it Between, and the both ends of the anti-stab elastic component are connect with the attachment base, first baffle respectively.

The above-mentioned release mechanism for remaining needle, can be used for being mounted on the catheter block of remaining needle, the first puncturing hole, second Puncturing hole passes through for puncturing needle tubing, using remaining needle during normal propulsion punctures needle tubing, is pierced into people when puncturing needle tubing When the length of body will be more than safe length, first baffle is contradicted on human body, under the elastic force effect of anti-stab elastic component, puncture needle Pipe can be increasingly difficult to be pierced into human body, while elastic force effect can also prompt that medical staff is enabled to find to wear in time to medical staff Thorn is excessive, so that the needle point for puncturing needle tubing be effectively prevent excessively to be pierced into human body, protects patient from unexpectedly injuring, improves indwelling The safety that needle uses.

Further, the attachment base includes sleeve and second baffle, and the first end of the sleeve is used for and remaining needle Catheter block connection, the second end of the sleeve are connect with the second baffle, and the sleeve is equipped with first puncturing hole, institute It states second baffle to be oppositely arranged with the first baffle, the anti-stab elastic component is arranged in the second baffle and the first gear Between plate, the both ends of the anti-stab elastic component are connect with the second baffle, first baffle respectively.

Further, the anti-stab elastic component includes anti-stab spring and is respectively arranged on the of the anti-stab both ends of the spring One snap-gauge and the second snap-gauge,

The first mounting groove is offered on the first baffle side opposite with the second baffle, on the first baffle The first fixing slot is also provided at the groove bottom of first mounting groove, first mounting groove is used to supply first snap-gauge It is put into, first fixing slot is for fixing postrotational first snap-gauge；

The second mounting groove is offered on the second baffle side opposite with the first baffle, on the second baffle The second fixing slot is also provided at the groove bottom of second mounting groove, second mounting groove is used to supply second snap-gauge It is put into, second fixing slot is for fixing postrotational second snap-gauge.

Further, first snap-gauge and the second snap-gauge are rectangular slab, first mounting groove and described second Mounting groove corresponds to rectangular slot, and first fixing slot and second fixing slot are circular trough, the length of first snap-gauge Degree is greater than the width of first mounting groove, and the length of first snap-gauge is less than the diameter of first fixing slot, described The length of second snap-gauge is greater than the width of second mounting groove, and the length of second snap-gauge is less than second fixing slot Diameter.

Further, the anti-stab elastic component is at least two, and anti-stab elastic component described in two of them is symmetricly set on institute State the two sides of the first puncturing hole, first mounting groove, the first fixing slot, the second mounting groove, the number of the second fixing slot and institute The number for stating anti-stab part is corresponding.

Further, tube socket mounting groove is offered on the first end end face of the sleeve, the sleeve is used in its tube socket The outside of catheter block is sheathed at mounting groove.

Further, first puncturing hole, institute are offered on the sleeve at the groove bottom of the tube socket mounting groove The first puncturing hole is stated to dock for being pierced by interface with the needle tubing of catheter block.

A kind of safe type retention needle including inlying catheter component, punctures needle tubing and as described above for remaining needle Release mechanism, the inlying catheter component include catheter block, indwelling tube and batching pig, the catheter block have axially through sky Chamber, an end interface of the cavity are that needle tubing is pierced by interface, and one end of the indwelling tube, which is arranged, is pierced by interface in the needle tubing, The other end of the indwelling tube stretches out the needle tubing and is pierced by interface, and the batching pig is arranged in the cavity, the puncture needle Pipe stretches out the indwelling tube, the peace for remaining needle across the batching pig and indwelling tube, the syringe needle for puncturing needle tubing Full mechanism is connect by its described attachment base with the catheter block.

Above-mentioned safe type retention needle has the above-mentioned peace for remaining needle including the above-mentioned release mechanism for remaining needle Organization-wide technical effect, when puncturing needle tubing to be pierced into the length of human body to be more than safe length, first baffle is contradicted in human body On, under the elastic force effect of anti-stab elastic component, puncturing needle tubing can be increasingly difficult to be pierced into human body, while elastic force effect also can be to doctor Shield personnel prompt enable medical staff find to puncture through in time it is more, thus effectively prevent puncture needle tubing needle point be excessively pierced into people Body protects patient from unexpectedly injuring, and the safe type retention needle is safe and reliable.

Further, offer dispensing hole on the catheter block with the batching pig corresponding section, on the batching pig A glue groove is offered with dispensing hole corresponding section.

Further, the catheter block is triplet type catheter block, and the catheter block has lateral branching tube socket, described lateral One end of branch's tube socket is connected to the cavity, and the other end of the lateral branching tube socket with infusion component for connecting.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of safe type retention needle described in an embodiment of the present invention；

Fig. 2 is the right view of safe type retention needle described in an embodiment of the present invention；

Fig. 3 is the A-A cross-sectional view in Fig. 2；

Fig. 4 is the top view of safe type retention needle described in an embodiment of the present invention；

Fig. 5 is the B-B cross-sectional view in Fig. 4；

Fig. 6 is the structural schematic diagram of catheter block described in an embodiment of the present invention；

Fig. 7 is the structural schematic diagram described in another embodiment of the utility model for the release mechanism of remaining needle；

Fig. 8 is the front view described in another embodiment of the utility model for the release mechanism of remaining needle；

Fig. 9 is the C-C cross-sectional view in Fig. 8；

Figure 10 is the D-D cross-sectional view in Fig. 8；

Figure 11 is the E-E cross-sectional view in Fig. 9；

Figure 12 is the F-F cross-sectional view in Fig. 9.

Description of symbols:

100, for the release mechanism of remaining needle, 110, attachment base, 111, sleeve, the 1111, first puncturing hole, 1112, pipe Seat mounting groove, 112, second baffle, the 1121, second mounting groove, the 1122, second fixing slot, 120, first baffle, 121, second wears Acanthopore, the 122, first mounting groove, the 123, first fixing slot, 130, anti-stab elastic component, 131, anti-stab spring, the 132, first snap-gauge, 133, the second snap-gauge, 200, inlying catheter component, 210, catheter block, 211, cavity, 212, needle tubing be pierced by interface, 213, needle tubing peace Attaching mouth, 214, dispensing hole, 215, lateral branching tube socket, 2151, pipe connection dispensing hole, 220, batching pig, 221, point glue groove, 300, needle tubing, 400, Paracentesis needle holder are punctured.

Specific embodiment

The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model, It states.The better embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms It realizes, however it is not limited to embodiments described herein.On the contrary, the purpose of providing these embodiments is that making practical new to this The disclosure of type understands more thorough and comprehensive.

It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper", There is no intermediary elements.Term as used herein "vertical", "horizontal", "left" and "right" and similar statement are For illustrative purposes, it is not meant to be the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein packet Include any and all combinations of one or more related listed items.Term as used herein " first ", " second " It is used to distinguish object Deng herein, but these objects should not be limited by these terms.

As shown in Figure 1, an embodiment provides a kind of safe type retention needle, including inlying catheter component 200, puncture needle tubing 300 and following release mechanisms 100 for remaining needle.As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, the inlying catheter component 200 include catheter block 210, indwelling tube (not shown) and batching pig 220.The catheter block 210 have axially through sky Chamber 211, an end interface of the cavity 211 are that needle tubing is pierced by interface 212.One end setting of the indwelling tube is worn in the needle tubing At outgoing interface 212, the other end of the indwelling tube stretches out the needle tubing and is pierced by interface 212.The batching pig 220 is arranged described In cavity 211.The puncture needle tubing 300 passes through the batching pig 220 and indwelling tube stretches out, the syringe needle for puncturing needle tubing 300 Stretch out the indwelling tube.The release mechanism 100 for remaining needle is connected through seat 110 and connect with the catheter block 210. In the present embodiment, the syringe needle for puncturing needle tubing 300 slightly stretches out in indwelling tube, is convenient for venipuncture, and needle tubing is then punctured at pumping Afterwards, indwelling tube is stayed in human body.

The safe type retention needle further includes rivet (not shown) in one of the embodiments, and the rivet is set The side for being pierced by interface 212 close to the needle tubing in the cavity 211 is set, one end of the indwelling tube is set by the rivet It sets and is pierced by interface 212 in the needle tubing, through-hole in axial direction is offered on the rivet, the puncture needle tubing 300 is worn The batching pig 220, rivet and indwelling tube are crossed, the syringe needle for puncturing needle tubing 300 stretches out the indwelling tube.Indwelling tube is first processed It is fixed on rivet location, then indwelling tube and rivet component are processed together again in the cavity 211 of indentation catheter block 210, thus Realize installation.

Further, the safe type retention needle further includes Paracentesis needle holder 400, and another end interface of the cavity 211 is Needle tubing installs interface 213, and Paracentesis needle holder 400 is arranged at the needle tubing installation interface 213 of the catheter block 210, punctures needle tubing 300 Tail end be fixed on the Paracentesis needle holder 400.And then it is fixed, it can be achieved that puncturing installation of the needle tubing 300 on catheter block 210.

Further, it as shown in Fig. 2, Fig. 3, Fig. 6, is opened up on the catheter block 210 with 220 corresponding section of batching pig There is dispensing hole 214, is offering a glue groove 221 with 214 corresponding section of dispensing hole on the batching pig 220.In this way, can lead to Cross the progress dispensing operation at dispensing hole 214 and point glue groove 221 prevents so that batching pig 220 is connect reliably with catheter block 210 Puncture needle tubing 300 causes batching pig 220 mobile when passing through and detaching batching pig 220.

Further, as shown in Figure 5, Figure 6, the catheter block 210 is triplet type catheter block 210, and the catheter block 210 has There is lateral branching tube socket 215.One end of the lateral branching tube socket 215 is connected to the cavity 211, the lateral branching tube socket 215 other end with infusion component for connecting.In turn, after completing to puncture, lateral branching tube socket 215 can be used for infusion component Connection, realizes external medical fluid convenient for being connected with other transfusion instruments.Optionally, the lateral branching tube socket 215 is equipped with pipe Dispensing hole 2151 is connected, dispensing is carried out when convenient for connecting with the extension tube of infusion component and is fixed.

The safe type retention needle further includes sheath (not shown) in one of the embodiments, and the sheath is used In being set on the outside of the syringe needle for puncturing needle tubing 300, thus, it is possible to protect the needle point and indwelling tube for puncturing needle tubing 300.

As shown in Figure 7, Figure 8, another embodiment provides a kind of release mechanism 100 for remaining needle, including attachment base 110, first baffle 120 and anti-stab elastic component 130.As shown in Fig. 7, Fig. 1, Fig. 3, the attachment base 110 is used for and remaining needle Catheter block 210 connects.The attachment base 110 is equipped with the first puncturing hole passed through for the puncture needle tubing 300 for remaining needle 1111, first puncturing hole 1111 is connected to for being pierced by interface 212 with the needle tubing of catheter block 210.On the first baffle 120 Equipped with the second puncturing hole 121 passed through for the puncture needle tubing 300 for remaining needle.The anti-stab elastic component 130 is arranged described Between attachment base 110 and the first baffle 120, and the both ends of the anti-stab elastic component 130 respectively with the attachment base 110, First baffle 120 connects.

The above-mentioned release mechanism 100 for remaining needle, can be used for being mounted on the catheter block 210 of remaining needle, and first punctures Hole 1111, the second puncturing hole 121 pass through for puncturing needle tubing 300, using remaining needle in the normal process for promoting puncture needle tubing 300 In, when puncturing needle tubing 300 to be pierced into the length of human body to be more than safe length, first baffle 120 is contradicted on human body, anti-stab Under the elastic force effect of elastic component 130, puncturing needle tubing 300 can be increasingly difficult to be pierced into human body, while elastic force effect can also give medical care Personnel prompt enable medical staff find to puncture through in time it is more, thus effectively prevent puncture needle tubing 300 needle point be excessively pierced into Human body protects patient from unexpectedly injuring, improves the safety that remaining needle uses.The release mechanism of the remaining needle, when use It may be stuck in human skin surface, be retained on human body with indwelling tube, catheter block 210, medical staff can be prevented due to dredging Sometimes so that tip portion is excessively pierced into the contingency risk of human body, can be improved the safety that remaining needle uses, and structure it is simple, Compact, easy to operate, cost is relatively low.

Specifically, when puncturing needle tubing 300 to be pierced into the length of human body to be more than safe length, realize that first baffle 120 supports The structure touched on human body can be arranged according to actual needs, as by changing attachment base 110 along puncturing 300 axial direction of needle tubing 130 length of length, 120 thickness of first baffle and anti-stab elastic component etc..

Further, the attachment base 110 includes sleeve 111 and second baffle 112.The first end of the sleeve 111 is used It is connect in the catheter block 210 with remaining needle, the second end of the sleeve 111 is connect with the second baffle 112.The sleeve 111 are equipped with first puncturing hole 1111.The second baffle 112 is oppositely arranged with the first baffle 120, described anti-stab Elastic component 130 is arranged between the second baffle 112 and the first baffle 120, the both ends point of the anti-stab elastic component 130 It is not connect with the second baffle 112, first baffle 120.Using the above structure, sleeve 111 can play connecting conduit seat 210 Effect, and sleeve 111 has certain length, can be set in by the first puncturing hole 1111 and puncture the outer of needle tubing 300 Side, the part needle tubing section that interface 212 can be pierced by the puncture stretching needle tubing of needle tubing 300 are protected, and prevent puncture needle tubing 300 from wearing Because external force makes needle point bending deformation during thorn, elastic masterpiece is realized in second baffle 112 and the cooperation of first baffle 120 With stress is more uniform, operates convenient for medical staff.

Further, as shown in Fig. 3, Fig. 8, Figure 10, tube socket mounting groove is offered on the first end end face of the sleeve 111 1112, the sleeve 111 is used to be sheathed on the outside of catheter block 210 at its tube socket mounting groove 1112.In this way, can pacify in tube socket Gluing is set on tankage 1112, realizes that sleeve 111 is connect with the gluing of catheter block 210, it is easy to connect reliable.The sleeve 111 On offer first puncturing hole 1111 at the groove bottom of the tube socket mounting groove 1112, first puncturing hole 1111 is used It is docked in being pierced by interface 212 with the needle tubing of catheter block 210.In this way, the size of the first puncturing hole 1111 and needle tubing are pierced by interface 212 Size matching, the first puncturing hole 1111 can have to the part needle tubing section that the stretching needle tubing of needle tubing 300 is pierced by interface 212 is punctured Effect protection.

Specifically, the anti-stab elastic component 130 can be spring, elastic slice, elastic rubber etc..Specifically, the anti-stab bullet The both ends of property part 130 are connect with the second baffle 112, first baffle 120 respectively, can be a variety of by gluing, clamping, bolt etc. Mode connects.First baffle 120 realizes the connection with second baffle 112 by the anti-stab elastic component 130.

In one of the embodiments, as shown in Figure 8, Figure 9, the anti-stab elastic component 130 include anti-stab spring 131, with And it is respectively arranged on first snap-gauge 132 and the second snap-gauge 133 at 131 both ends of anti-stab spring.The first baffle 120 with it is described The first mounting groove 122 is offered on the opposite side of second baffle 112, in first mounting groove on the first baffle 120 The first fixing slot 123 is also provided at 122 groove bottom, first mounting groove 122 is used to put for first snap-gauge 132 Enter, first fixing slot 123 is for fixing postrotational first snap-gauge 132；The second baffle 112 and the first baffle The second mounting groove 1121 is offered on 120 opposite sides, in the slot of second mounting groove 1121 on the second baffle 112 The second fixing slot 1122 is also provided at bottom surface, second mounting groove 1121 is used to be put into for second snap-gauge 133, described Second fixing slot 1122 is for fixing postrotational second snap-gauge 133.Using the above structure, when anti-stab spring 131 is installed, by the One snap-gauge 132 is put into the first mounting groove 122, is rotated behind 132 arrival slot bottom of the first snap-gauge, then the first snap-gauge 132 can It is fixed in the first fixing slot 123 by rotation mode, realizes the connection of anti-stab spring 131 one end and first baffle 120；By Two snap-gauges 133 are put into the second mounting groove 1121, are rotated behind 133 arrival slot bottom of the second snap-gauge, then the second snap-gauge 133 can It is fixed in the second fixing slot 1122 by rotation mode, realizes the connection of anti-stab spring 131 other end and second baffle 112. First mounting groove 122 and the second mounting groove 1121 are respectively used to be correspondingly placed into the first snap-gauge 132, the second snap-gauge 133, and accommodate anti- The end of spring 131 is pierced, the first internal fixing slot 123 and the second fixing slot 1122 are respectively used to correspondence and block the first snap-gauge 132, the second snap-gauge 133, anti-stab elastic component 130 are convenient to mount and dismount, and the release mechanism structure of the remaining needle is simple, compact.

Optionally, first snap-gauge 132 and 120 glue connections of the first baffle, second snap-gauge 133 with it is described 112 glue connections of second baffle.In this way, the both ends of anti-stab spring 131 can be further fixed, the both ends of anti-stab spring 131 are realized Absolute fixation.Optionally, resin glue can be taken to carry out a glue connection.

Specifically, the knot of the first mounting groove 122, the second mounting groove 1121, the first fixing slot 123, the second fixing slot 1122 Structure can be to be a variety of, and the purpose is to first pass through the first mounting groove 122, the second mounting groove 1121 realizes corresponding first snap-gauge 132 With being put into for the second snap-gauge 133, then the first snap-gauge 132 and the second card realized by the first fixing slot 123, the second fixing slot 1122 The postrotational fixation of plate 133.For example, the first mounting groove 122 is matched with the first snap-gauge 132 settablely, the second mounting groove 1121 It is matched settablely with the second snap-gauge 133, the first fixing slot 123 can be identical as 122 structure of the first mounting groove, but first fixes Slot 123 and the first mounting groove 122 have certain rotation angle, and the second fixing slot 1122 can be with 1121 structure of the second mounting groove It is identical, but the second fixing slot 1122 and the second mounting groove 1121 have certain rotation angle etc..

In one of the embodiments, as shown in Fig. 9, Figure 11, Figure 12, first snap-gauge 132 and the second snap-gauge 133 are For rectangular slab, first mounting groove 122 corresponds to rectangular slot, first fixing slot with second mounting groove 1121 123 with second fixing slot 1122 be circular trough, and the length of first snap-gauge 132 is greater than first mounting groove 122 Width, and the length of first snap-gauge 132 is less than the diameter of first fixing slot 123, the length of second snap-gauge 133 Greater than the width of second mounting groove 1121, and the length of second snap-gauge 133 is less than second fixing slot 1122 Diameter.Using the above structure, it can be achieved that the installation of anti-stab elastic component 130, when the first snap-gauge 132, the rotation of the second snap-gauge 133 are fixed It can be rotated towards different directions, it is easy to operate.

Further, as shown in Figure 1, Figure 3, the anti-stab elastic component 130 is at least two, anti-stab bullet described in two of them Property part 130 is symmetricly set on the two sides of first puncturing hole 1111, first mounting groove 122, the first fixing slot 123, Two mounting grooves 1121, the number of the second fixing slot 1122 are corresponding with the number of the anti-stab part.In turn, first baffle 120 and When two baffles 112 cooperate, elastic force is more uniformly stressed, and is conducive to medical staff's operation.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.

Claims (10)

1. a kind of release mechanism for remaining needle, which is characterized in that including attachment base, first baffle and anti-stab elastic component, institute Attachment base is stated for connect with the catheter block of remaining needle, the attachment base for the puncture needle tubing for remaining needle equipped with passing through First puncturing hole, first puncturing hole are used to be pierced by orifice with the needle tubing of catheter block, and the first baffle, which is equipped with, to be used In the second puncturing hole that the puncture needle tubing for remaining needle passes through, the anti-stab elastic component is arranged in the attachment base and described first Between baffle, and the both ends of the anti-stab elastic component are connect with the attachment base, first baffle respectively.

2. the release mechanism according to claim 1 for remaining needle, which is characterized in that the attachment base include sleeve and Second baffle, the first end of the sleeve with the catheter block of remaining needle for connecting, the second end of the sleeve and described second Baffle connection, the sleeve are equipped with first puncturing hole, and the second baffle is oppositely arranged with the first baffle, described Anti-stab elastic component is arranged between the second baffle and the first baffle, the both ends of the anti-stab elastic component respectively with it is described Second baffle, first baffle connection.

3. the release mechanism according to claim 2 for remaining needle, which is characterized in that the anti-stab elastic component includes anti- Thorn spring and the first snap-gauge and the second snap-gauge for being respectively arranged on the anti-stab both ends of the spring,

The first mounting groove is offered on the first baffle side opposite with the second baffle, in institute on the first baffle It states and is also provided with the first fixing slot at the groove bottom of the first mounting groove, first mounting groove is used to put for first snap-gauge Enter, first fixing slot is for fixing postrotational first snap-gauge；

The second mounting groove is offered on the second baffle side opposite with the first baffle, in institute on the second baffle It states and is also provided with the second fixing slot at the groove bottom of the second mounting groove, second mounting groove is used to put for second snap-gauge Enter, second fixing slot is for fixing postrotational second snap-gauge.

4. the release mechanism according to claim 3 for remaining needle, which is characterized in that first snap-gauge and the second card Plate is rectangular slab, and first mounting groove and second mounting groove correspond to rectangular slot, first fixing slot with Second fixing slot is circular trough, and the length of first snap-gauge is greater than the width of first mounting groove, and described first The length of snap-gauge is less than the diameter of first fixing slot, and the length of second snap-gauge is greater than the width of second mounting groove Degree, and the length of second snap-gauge is less than the diameter of second fixing slot.

5. the release mechanism according to claim 3 for remaining needle, which is characterized in that the anti-stab elastic component is at least Two, anti-stab elastic component described in two of them is symmetricly set on the two sides of first puncturing hole, first mounting groove, first Fixing slot, the second mounting groove, the number of the second fixing slot are corresponding with the number of the anti-stab part.

6. according to the described in any item release mechanisms for remaining needle of claim 2~5, which is characterized in that the sleeve Tube socket mounting groove is offered on first end end face, the sleeve is used to be sheathed on the outside of catheter block at its tube socket mounting groove.

7. the release mechanism according to claim 6 for remaining needle, which is characterized in that in the tube socket on the sleeve First puncturing hole is offered at the groove bottom of mounting groove, first puncturing hole is used to be pierced by interface with the needle tubing of catheter block Docking.

8. a kind of safe type retention needle, which is characterized in that including inlying catheter component, puncture needle tubing and such as claim 1~7 Described in any item release mechanisms for remaining needle, the inlying catheter component include catheter block, indwelling tube and batching pig, institute State catheter block have axially through cavity, an end interface of the cavity is that needle tubing is pierced by interface, one end of the indwelling tube Setting is pierced by interface in the needle tubing, and the other end of the indwelling tube stretches out the needle tubing and is pierced by interface, and the batching pig is set Set in the cavity, the puncture needle tubing pass through the batching pig and indwelling tube, it is described puncture needle tubing syringe needle stretch out described in Indwelling tube, the release mechanism for remaining needle are connect by its described attachment base with the catheter block.

9. safe type retention needle according to claim 8, which is characterized in that opposite with the batching pig on the catheter block Should place offer dispensing hole, offering a glue groove with dispensing hole corresponding section on the batching pig.

10. safe type retention needle according to claim 8, which is characterized in that the catheter block is triplet type catheter block, institute Catheter block is stated with lateral branching tube socket, one end of the lateral branching tube socket is connected to the cavity, the lateral branching pipe The other end of seat with infusion component for connecting.