CN204544948U - Syringe needle retracting device and needle holder assembly and recovery tube assembly - Google Patents
Syringe needle retracting device and needle holder assembly and recovery tube assembly Download PDFInfo
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- CN204544948U CN204544948U CN201420801764.6U CN201420801764U CN204544948U CN 204544948 U CN204544948 U CN 204544948U CN 201420801764 U CN201420801764 U CN 201420801764U CN 204544948 U CN204544948 U CN 204544948U
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- component
- recovering pipe
- recovery tube
- needle holder
- internal recovering
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Abstract
The utility model discloses a kind of syringe needle retracting device and for the needle holder assembly that reclaims syringe needle and recovery tube assembly.The fastened component that needle holder assembly comprises joint, needle holder cylinder, plinth, the first separating member and is formed on joint; The fastened component that recovery tube assembly comprises outside recovery tube, internal recovering pipe, Compress Spring, sliding part, piston rod component and is formed on piston rod component.According to the utility model, when recovery tube assembly in needle holder cylinder near joint time, joint and piston rod component are fixed together by a pair fastened component, piston rod component is separated with internal recovering pipe by the first separating member subsequently, so Compress Spring is released, under the pulling force effect of Compress Spring, piston rod component is recycled in internal recovering pipe with the joint being fixed with syringe needle, thus the accident preventing syringe needle to cause is stabbed.
Description
Technical field
The utility model relates to syringe needle retracting device and for the needle holder assembly that reclaims syringe needle and recovery tube assembly.
Background technology
Being analyzed the health condition or the cause of disease that judge the detected objects such as people by blood count, is a kind of extremely general medical practice.For this reason, the such as venous blood being gathered detected object by blood-taking device is first needed.A kind of typical blood-taking device comprises blood taking needle, needle holder and can by the vacuum test tube of blood taking needle Automatic Extraction blood.When taking a blood sample, first by joint, blood taking needle is fixed on the plinth of needle holder, then venipuncture is carried out to detected object, then vacuum test tube is installed in needle holder, so, automatically flow in vacuum test tube under the effect of venous blood vacuum in vacuum test tube.If need multi collect blood, then can take off the vacuum test tube having adopted blood, then adopt pipe then to take a blood sample by new vacuum.After completing whole blood sampling work, blood taking needle is extracted from the vein of detected object.
Utilize above-mentioned blood-taking device, after blood sampling work completes, blood taking needle is still arranged on needle holder, and is dropped together with needle holder in this state.In this case, Nurses or cleanup crew subsequently are likely exposed on outer blood taking needle and stab, and are likely infected.
Utility model content
In order to prevent the hemostix of the prior art blood taking needle that it exposes after having taken a blood sample from causing unexpected stabbing, the utility model provides a kind of syringe needle retracting device, and it comprises needle holder assembly and recovery tube assembly.Needle holder assembly comprises for the joint of fixed needle, the needle holder cylinder of hollow and the plinth for anchor tip separably, and plinth is formed in one end of needle holder cylinder.Recovery tube assembly can be put in needle holder cylinder, and comprises: outside recovery tube, and it has open end and closed end; Internal recovering pipe, it has the first open end and the second open end, and internal recovering pipe to be contained at least in part in outside recovery tube and to be fixedly connected with outside recovery tube; Compress Spring, it is between outside recovery tube and internal recovering pipe, and one end of Compress Spring is fixedly attached to internal recovering pipe; Sliding part, it to be contained at least in part in inner recovery tube and can the other end of backstop Compress Spring; With piston rod component, it has the first end of the first open end being fixed on internal recovering pipe separably and is positioned at internal recovering pipe and the second end engaged with sliding part.
The first pair of fastened component be respectively formed on joint and piston rod component first end on, when recovery tube assembly in needle holder cylinder near joint time, first pair of fastened component can engage joint and piston rod component to be fixed together.
First separating member is formed on one of both the plinth side of needle holder cylinder and joint, when recovery tube assembly in needle holder cylinder near joint time, the first separating member can the first end of engaging piston bar component the first end of piston rod component be separated with the first open end of internal recovering pipe.
The relative position of first pair of fastened component and the first separating member is set to when after first pair of fastened component engaging, the first separating member engaging piston bar component.
The utility model additionally provides a kind of needle holder assembly for reclaiming syringe needle, and it comprises in above-mentioned joint, needle holder cylinder, plinth, the first separating member and described first pair of fastened component the fastened component be formed on joint.
The utility model additionally provides a kind of recovery tube assembly for reclaiming syringe needle, and it comprises in above-mentioned outside recovery tube, internal recovering pipe, Compress Spring, sliding part, piston rod component and described first pair of fastened component the fastened component be formed on piston rod component.
According to the utility model, when recovery tube assembly in needle holder cylinder near joint time, joint and piston rod component are fixed together by first pair of fastened component, piston rod component is separated with recovery tube by the first separating member subsequently, so Compress Spring is released, under the pulling force effect of Compress Spring, piston rod component is recycled in recovery tube with the joint of the syringe needle being fixed with such as blood taking needle, thus the accident preventing syringe needle to cause is stabbed.
Accompanying drawing explanation
Fig. 1 is the syringe needle retracting device sectional view before reclamation begins according to a kind of embodiment of the utility model.
Fig. 2 is the top view of the needle holder cylinder according to a kind of embodiment of the utility model.
Fig. 3 is the sectional view intercepted along III-III in Fig. 2.
Fig. 4 is the sectional view intercepted along IV-IV in Fig. 2.
Fig. 5 is the top view of the joint according to a kind of embodiment of the utility model.
Fig. 6 is the sectional view intercepted along VI-VI in Fig. 5.
Fig. 7 is the sectional view intercepted along VII-VII in Fig. 5.
Fig. 8 is the longitudinal sectional view of the recovery tube assembly according to a kind of embodiment of the utility model.
Fig. 9 is the longitudinal sectional view of the internal recovering pipe according to a kind of embodiment of the utility model.
Figure 10 is the stereogram of the internal recovering pipe of Fig. 9.
Figure 11 is the stereogram of the sliding part according to a kind of embodiment of the utility model.
Figure 12 is the front view of the piston component according to a kind of embodiment of the utility model.
Figure 13 is the longitudinal sectional view of piston component shown in Figure 12.
Figure 14-17 is the schematic diagrames reclaiming blood taking needle according to syringe needle retracting device of the present utility model.
Detailed description of the invention
Below with reference to accompanying drawings to reclaim structure and the operation principle that syringe needle retracting device of the present utility model explained by blood taking needle.But, it should be appreciated by those skilled in the art that the utility model is not limited only to reclaim blood taking needle, also can be applied to the syringe needle that other need to reclaim.
Fig. 1 is syringe needle retracting device of the present utility model sectional view before reclamation begins.Illustrated syringe needle retracting device comprises needle holder assembly 1 and recovery tube assembly 2.Needle holder assembly 1 comprises for the fixing joint 10 of blood taking needle 3 (see Figure 14 ~ 17) and the needle holder cylinder 11 of hollow and one end (front end, left end in figure) of being formed in needle holder cylinder 11 plinth 12 for anchor tip 10 separably.
Recovery tube assembly 2 comprises the outside recovery tube 20 can put in needle holder cylinder 11, internal recovering pipe 21, Compress Spring 22, sliding part 23 and piston rod component 24.Outside recovery tube 20 comprises open end 201 and closed end 202.Internal recovering pipe 21 is positioned at inside outside recovery tube 20 at least in part, and has the first open end 211 and the second relative open end 212.Piston rod component 24 comprises the first end 241 of first open end 211 that can be fixed on internal recovering pipe 21 separably and is positioned at the second end 242 of internal recovering pipe 21.Compress Spring 22 is between outside recovery tube 20 and internal recovering pipe 21, and its one end is connected to internal recovering pipe 21, and the other end is in compressive state by sliding part 23 backstop.The main body of sliding part 23 is arranged in internal recovering pipe 20, and it comprises can through the projection of one end of the longitudinal chute contact Compress Spring 22 on internal recovering pipe 20 and the card that can be stuck on the second end 242 of piston rod component 24.
According to the utility model, when reclaiming blood taking needle 3 (see Figure 14 ~ 17), joint 10 can be fixed together with piston rod component 24, and after piston rod component 24 is separated with internal recovering pipe 21, sliding part 23 longitudinally chute 213 (see Figure 10) to slide thus under the pulling force effect discharging Compress Spring 22, along with piston rod component 24, to be drawn into internal recovering pipe 21 together inner.
In the utility model, a component is formed on another component, and both having comprised two components is that the situation of two independent components also comprises the situation that two components are two parts of single component.The meaning that term " is fixed " refers to that the component combined can not separate when normal work.Term " separable " be meant to by applying extra appropriate forces, can by the component that is fixed together separately; The component that the meaning of " inseparable " is fixed together all can not separate or only have in any case and even could separate by destroying by applying very large power.Representing that the term " front " in orientation or " afterwards " are for the position of blood taking needle during blood sampling, be positioned at or be " front " towards blood taking needle side, is " afterwards " away from blood taking needle side.And directional terminology " on ", D score, "left", "right" be only for accompanying drawing.
Relativeness according to fixing, Compress Spring, the sliding part of fixing, the outside recovery tube of syringe needle retracting device center tap of the present utility model and needle holder cylinder and internal recovering pipe and piston rod component, being separated of fixing, piston rod component and internal recovering pipe of fixing, joint and piston rod component of piston rod component and internal recovering pipe, the fixing and the position relationship of two pairs of fastened components and separating member of internal recovering pipe and needle holder cylinder are described below with reference to accompanying drawings particularly.
joint and needle holder cylinder fixing
Fig. 5,6,7 shows the joint 10 according to a kind of detailed description of the invention of the utility model.Wherein, Fig. 5 is the top view of joint 10, Fig. 6 and Fig. 7 is along the sectional view that VI-VI and VII-VII intercepts respectively in Fig. 5.
See Fig. 5 and 6, joint 10 comprise be positioned at middle for installing the installation portion 100 of blood taking needle and the department of assembly 101 round installation portion 100.The concrete shape of installation portion 100 and structure depend on blood taking needle to be installed, can use the structure can installing blood taking needle in prior art arbitrarily, the utility model for installation portion without any restriction.Plinth 12, for coordinating with the plinth 12 of needle holder cylinder 11, is fixed in a detachable fashion in department of assembly 101.This separable fixed form can be such as that interference fit between the outer peripheral face and the inner surface of plinth 12 of the department of assembly 101 of joint 10 and/or male-female coordinate.It will be understood by those skilled in the art that the separable fixing power produced, its size should be greater than and pierces through the power needed for blood vessel such as such as vein, with normally carrying out of ensureing to take a blood sample; The pulling force produced when the Compress Spring 22 be simultaneously less than between outside recovery tube 20 and internal recovering pipe 21 is released, to ensure that blood taking needle can be recycled in internal recovering pipe 21.
Shown in Fig. 2,3 and 4 is needle holder cylinder 11 according to a kind of detailed description of the invention of the utility model.Wherein, Fig. 2 is the top view of needle holder cylinder 11, Fig. 3 and Fig. 4 is respectively along the sectional view that III-III and IV-IV in Fig. 2 intercepts.
See Fig. 3 and 4, in order to prevent blood taking needle from surprisingly departing from the outside of needle holder cylinder 11 at removal process center tap 10, backstop 13 can be set in the front end of the plinth 12 of needle holder cylinder 11.Backstop 13 can be the flange inwardly given prominence to from the inner surface of plinth 12 (or needle holder cylinder 11), and the form of some sections that can be a circle or circumferentially distribute, is formed with backwards the rear end surface 130 of () in figure down.Accordingly, see Fig. 6, the department of assembly 101 of joint 10 is formed with front-end surface 102 (in figure right side).
See Fig. 1, when joint 10 is in plinth 12 during installation in position, the front-end surface 102 of joint 10 and the rear end surface 130 of backstop 13 against, thus prevent joint 10 accidental.
outside recovery tube is fixed with internal recovering pipe
Fig. 8 shows the recovery tube assembly 2 according to a kind of detailed description of the invention of the utility model.The clamping device of the second open end 212 for clamping internal recovering pipe 21 is provided with inside the closed end 202 of outside recovery tube 20.Clamping device comprises the longitudinal tube wall being parallel to outside recovery tube 20 from the inner face of closed end 202 to be given prominence to and with longitudinal tube wall cylindrical part 203 separately with from the close closed end 202 of longitudinal inner surface of tube wall of outside recovery tube 20 towards the wedge-shaped part 204 of the inner face progressive additive of closed end 202.The form of some sections that wedge-shaped part 204 can be a circle or circumferentially distribute.Wedge-shaped part 204 can be integrally formed with outside recovery tube 20, also can be independent wedge.Leave gap 205 between wedge-shaped part 204 and cylindrical part 203, the diameter in gap 205 is substantially equal to the diameter of the second open end 212 of internal recovering pipe 21, so that the second open end 212 of internal recovering pipe 21 can be clamped in gap 205.
Close first open end 211 place of longitudinal tube wall of internal recovering pipe 21 is provided with the notch cuttype flange 206 outwardly given prominence to from longitudinal tube wall, the form of some sections that can be a circle or circumferentially distribute, the first rear end surface 207 and the second rear end surface 208, first rear end surface 207 that are formed with (towards the right side in figure) backwards abut with the end face of the open end 201 of outside recovery tube 20.By in the gap 205 that formed inside the closed end 202 that the second open end 212 of internal recovering pipe 21 is clamped in outside recovery tube 20, and the end face of the open end 201 of outside recovery tube 20 is abutted with the first rear end surface 207 of the notch cuttype flange 206 of internal recovering pipe 21, makes together with outside recovery tube 20 is stably fixed with internal recovering pipe 21.
Fig. 9 and Figure 10 respectively illustrates sectional view according to the internal recovering pipe 21 of a kind of detailed description of the invention of the utility model and stereogram.Internal recovering pipe 21 offer at close notch cuttype flange 206 place of longitudinal tube wall two of diametrically contraposition backwards (towards the right side in figure) extend to longitudinal chute 213 of the second open end 212.
the relativeness of Compress Spring, sliding part and piston rod component
See Fig. 8, Compress Spring 22 is between outside recovery tube 20 and internal recovering pipe 21, and its one end is fixedly attached to the second rear end surface 208 of the notch cuttype flange 206 of internal recovering pipe 21, and the other end remains on compressive state by sliding part 23.
Figure 11 shows the stereogram of the sliding part 23 according to a kind of detailed description of the invention of the utility model.Sliding part 23 comprises outer surface diametrically a pair projection 232 outwardly and multiple general conical cards 233 from inner surface radial direction inclination projection of circumferentially arranging along the inner surface of main body 231 of main body 231, autonomous agent 231.Main body 231 is preferably tubular and its diameter is less than or equal to the internal diameter of internal recovering pipe 21.The quantity of projection 232 is corresponding with the quantity of longitudinal chute 213 of internal recovering pipe 21, and is not limited to two.Compress Spring 22 through the end thereof contacts of the longitudinal chute 213 on internal recovering pipe 21 with Compress Spring 22, and when piston rod component 24 and internal recovering pipe 21 are fixing, is remained on compressive state by the projection 232 of sliding part 23 in internal recovering pipe 21.When installing sliding part 23, the projection 232 of sliding part 23 is made alignedly to slip into longitudinal chute 213 from the second open end 212 place of internal recovering pipe 21 and longitudinal chute 213.The free end 234 of card 233 is stuck in the second end 242 place of piston rod component 24, thus when piston rod component 24 and internal recovering pipe 21 are fixing, sliding part 23 is also fixed relative to internal recovering pipe 21, and then by projection 232, Compress Spring 22 is remained on compressive state.Multiple radial slot 235 can be formed between card 233, thus be formed as easily deformable cantilever design and engage with the second end 242 of piston rod component 24 to facilitate.In addition, card 233 can radial skew projection, but can radial direction directly stretch, as long as can engage with the second end 242 of piston rod component 24.
piston rod component and internal recovering pipe fixing
See Figure 12 and 13, the rear end (in figure lower end) of the outer peripheral face of annular wall 243 forms shoulder 248.Simultaneously see Fig. 9, the inner surface of the first side, openend 212 of internal recovering pipe 21 defines step 214.The external diameter of the annular wall 243 of piston rod component 24 is greater than the internal diameter of internal recovering pipe 21, like this, as shown in Figure 1, when piston rod component 24 is on internal recovering pipe 21 during installation in position, the shoulder 248 of annular wall 243 leans against on the step 214 in internal recovering pipe 21, thus stops the Compress Spring 22 in recovery tube assembly 2 to be drawn in internal recovering pipe 21 by piston rod component 24.
The shoulder 248 of annular wall 243 and the step 214 of internal recovering pipe 21, constitute the fixed component of the first open end 211 for the first end 241 of piston rod component 24 being fixed to internal recovering pipe 21.
Fixed component also can be that other can provide the resistance structure being greater than Compress Spring pulling force arbitrarily.Such as, alternatively, interference fit and/or male-female structure (not shown) can be formed between one section of inner peripheral surface of the first open end 211 side of the outer peripheral face of annular wall 243 and internal recovering pipe 21.In this case, the first end 241 of piston rod component 24 can not be the shape of annular wall, but can be any shape can directly put in internal recovering pipe 21.
joint and piston rod component fixing
See Fig. 1,5 ~ 7.In the shown embodiment, the department of assembly 101 of joint 10 comprises two relative cylinder partials 103 (Fig. 5 and 6), is formed with flat member 104 (Fig. 5 and 7) between two cylinder partials 103.Flat member 104 can be integrally extend out from the installation portion 100 of joint 10, can bend to form the case of bending of substantially complete cylinder with department of assembly 101 shown in Fig. 1 from the extended configuration shown in Fig. 5 and 7.When joint 10 is arranged in plinth 12, flat member 104 stretches out outside plinth 12 towards rear end.The part exceeding plinth 12 of flat member 104 forms fastened component 105.As shown in Figure 7, fastened component 105 comprises the guide surface 106 towards the wedge shape of rear end and the snap-latch surface towards front end 107 (under the case of bending shown in Fig. 1 or installment state).Snap-latch surface 107 relative to flat member 104 surperficial less perpendicular or acutangulate, make fastened component 105 be formed as hook-shaped.
Alternatively (not shown), joint 10 can not have flat member 104.At this moment, the plinth 12 that partly or entirely can extend rearward beyond needle holder cylinder 11 of the department of assembly 101 of joint 10, the part exceeding plinth 12 of department of assembly 101 forms hook-shaped fastened component.
See Figure 12 and 13.Figure 12 is the front view of piston rod component 24, and Figure 13 is the longitudinal sectional view of piston rod component 24.Illustrated piston rod component 24 comprises first end 241, and first end 241 is the form of annular wall 243.See Figure 13, the front end of the inner peripheral surface of annular wall 243 is formed with the guide surface 244 of wedge shape, is formed with snap-latch surface 245 in its back-end.Guide surface 244 and snap-latch surface 245 (or inner peripheral surface part of annular wall 243) constitute the fastened component 246 of piston rod component 24.Similar with the fastened component 105 of the joint 10 above described, the fastened component 246 of piston rod component 24 is also formed as hook-shaped.
When reclaiming blood taking needle, recovery tube assembly 2 injects in needle holder cylinder 11 (see Fig. 1 and 15), along with recovery tube assembly 2 close joint 10 in needle holder cylinder 11, the guide surface 244 of the fastened component 246 of piston rod component 24 contacts with the guide surface 106 of the fastened component 105 of joint 10 and guides two fastened components mutually to cross, make the snap-latch surface 245 of two fastened components, 107 facing with each other and be fastened togather, also make joint 10 and piston rod component 24 be fixed together simultaneously.So joint 10 and the blood taking needle on it 3 (see Figure 17) can be drawn in internal recovering pipe 21 together along with piston rod component 24.
Fastened component 246 and the fastened component 105 of joint 10 of piston rod component 24 constitute first pair of fastened component of the utility model syringe needle retracting device.
The guide surface 106,244 of above-mentioned fastened component is wedge shape, its objective is mutually crossing for the ease of fastened component.For this purpose, " wedge shape " should be broadly interpreted as the situation comprising chamfering or rounding.It will be understood by those skilled in the art that one of them guide surface is that wedge shape is also fine.In addition, one of them hook-shaped fastened component can be the edge formation of hole or groove or step etc.
In order to further facilitate mutually crossing of fastened component, at least one fastened component (or the component at fastened component place) is preferably made easily to deform.As shown in Figures 12 and 13, annular wall 243 can be formed multiple cannelure 247, make the section annular wall 243 between adjacent cannelure 247 be formed as cantilever design and easily deformable.
piston rod component is separated with internal recovering pipe
See Fig. 3 and Fig. 4, syringe needle retracting device of the present utility model (or needle holder assembly 1) also comprises separating member 14 (the first separating member).Illustrated separating member 14 is for being formed in the rear end of the plinth 12 of needle holder cylinder 11 component that (lower end in figure) is outstanding backward, and it has the parting surface 142 of tip 141 and the wedge shape inside most advanced and sophisticated 141.
With the separating member 14 of needle holder cylinder 11 accordingly, see Figure 12 and Figure 13, the outer peripheral face front end (in figure upper end) as the annular wall 243 of the first end 241 of piston rod component 24 is formed with the parting surface 249 of wedge shape.The outer peripheral face front end of parting surface 249 or annular wall 243 forms the separating member (the second separating member) of the first end 241 of piston rod component 24.
See Fig. 1, when reclaiming blood taking needle, along with recovery tube assembly 2 is near joint 11 (or plinth 12), the tip 141 of the separating member 14 of needle holder cylinder 11 is injected between annular wall 243 outer peripheral face and internal recovering pipe 21, the parting surface 142 of separating member 14 is engaged with the parting surface 249 of annular wall 243, subsequently by the extruding between lozenges, annular wall 243 deforms and external diameter reduces, thus the shoulder 248 of its outer peripheral face rear end is separated with the step 214 in internal recovering pipe 21.At this moment, piston rod component 24 enters in internal recovering pipe 21 under the pulling force effect of Compress Spring 22.
In above process, work in order to avoid may disturb between internal recovering pipe 21 and needle holder cylinder 11 is conducive to separating member 14, the space 143 (Fig. 4) that is substantially annular can be formed between the side contrary with parting surface 142 of separating member 14 and the inner surface of internal recovering pipe 21.
It will be understood by those skilled in the art that the parting surface 142 of the separating member 14 of needle holder cylinder 11 need not be all wedge shape with the parting surface 249 of the annular wall 243 of piston rod component 24, but a parting surface can be only had to be wedge shape.
As shown in Figures 12 and 13, multiple cannelures 247 that annular wall 243 is formed, make the section annular wall 243 between adjacent cannelure 247 be formed as cantilever design and easily deformable.This distortion is conducive to being separated of the annular wall 243 of piston rod component 24 and the first open end 211 of internal recovering pipe 21 equally.
Although in the shown embodiment, separating member 14 is formed on needle holder cylinder 11, it will be understood by those skilled in the art that separating member also can be formed in (not shown) on joint 10.
Be not shoulder/stepped form when fixed component of the present utility model and the interference fit be formed between first end 241 outer peripheral face of piston rod component 24 and one section of inner peripheral surface of internal recovering pipe 20 and/or male-female structure time, the first separating member 14 that needle holder cylinder 11 or joint 10 are formed without the need to wedge structure, as long as its outstanding length be suitable for internal recovering pipe 21 near joint 10 or plinth 12 time can promote piston rod component 24 first end 241 to be formed the inner peripheral surface of interference fit and/or male-female structure by that section of internal recovering pipe 21.That is, second separating member that can not formed separately, in other words, the first end 241 of piston rod component 24 is also simultaneously as the second separating member.
internal recovering pipe and needle holder cylinder fixing
At the end of recovery, blood taking needle is accommodated in internal recovering pipe 21 (see Figure 17) with joint 10.At this moment, in order to the accident preventing blood taking needle from causing better, is more easily stabbed, preferably make needle holder cylinder 11 and recovery tube assembly 2 be fixed together.
See Fig. 3, in the illustrated embodiment, the inner surface of the front of needle holder cylinder 11 is formed with fastened component 15.Fastened component 15 can be the flange inwardly given prominence to from the inner surface of needle holder cylinder 11, the form of some sections that flange can be a whole circle or circumferentially distribute, it comprises towards the guide surface 151 of the wedge shape of rear end (in figure lower end) and the snap-latch surface 152 towards front end (in figure upper end).Snap-latch surface 152 relative to cylindrical shell 100 inner surface (or outer surface) less perpendicular or acutangulate, make fastened component 15 be formed as hook-shaped.
With the fastened component 15 of needle holder cylinder 11 accordingly, as shown in Figure 9, be formed with fastened component 215 in the first open end 211 side of internal recovering pipe 21.Fastened component 215 can be flange outwardly on the outer surface of internal recovering pipe 21, flange can a whole circle or the form of some sections that circumferentially distributes, and it comprises the guide surface 217 towards the snap-latch surface 216 of rear end (in figure right-hand member) and the wedge shape towards front end (in figure left end).Snap-latch surface 216 relative to internal recovering pipe 21 outer peripheral face less perpendicular or formed acute angle, make fastened component 215 be formed as hook-shaped.
The fastened component 15 of needle holder cylinder 11 and the fastened component 215 of internal recovering pipe 21 constitute second pair of fastened component of the present utility model.
See Fig. 1, when reclaiming blood taking needle, along with recovery tube assembly 2 is near the plinth 12 of needle holder cylinder 11, the fastened component 15 of needle holder cylinder 11 and the fastened component 215 of internal recovering pipe 21 engage, both wedge-shaped guide surfaces 151 and 217 contact with each other and guide two fastened components mutually to cross, afterwards, the snap-latch surface 152 and 216 of two fastened components is fastened togather toward each other, thus achieves the fixing of needle holder cylinder 11 and internal recovering pipe 21.
Mutually crossing to further facilitate second pair of fastened component, the component at least one fastened component or its place can be made to be more prone to distortion.See Fig. 2 and 3, preferably, the part being formed with fastened component 15 of needle holder cylinder 11, is formed with the groove 16 of " U " shape substantially, makes fastened component 15 be formed as cantilever design also therefore easily deformable.As replacement embodiment, or combine with such scheme, in fig .9 shown in be formed in the fastened component 215 at the first open end 211 place of internal recovering pipe 21, can generally along and longitudinally form groove (not shown), make fastened component 215 be formed as cantilever design also therefore easily deformable.
With above-mentioned first pair of fastened component 105,246 the same, second pair of fastened component 15,205 is without the need to all having the guide surface of wedge shape.
In the embodiment shown in Fig. 3, can by forming U-lag 16, needle holder cylinder 11 is formed fastened component 15 and separating member 14 simultaneously, and namely fastened component 15 and separating member 14 are formed by the marginal portion on groove both sides respectively.
the position relationship of two pairs of fastened components and separating member
In order to ensure that blood taking needle can reliably be drawn in internal recovering pipe 21 with piston rod component 24, be preferably so that internal recovering pipe 21 and needle holder cylinder 11 are fixed together simultaneously, as shown in Figure 1, when joint 10 installation in position, the fastened component 105 of joint 10 and the fastened component 15 of needle holder cylinder 11 all backwards (towards the right side in figure) exceed the separating member 14 of needle holder cylinder 11.More generally, the relative position of first pair of fastened component, second pair of fastened component and the first separating member is set to when after first pair of fastened component and second pair of fastened component engaging (namely snap-latch surface is facing with each other), and the first separating member just piston rod component is separated.
The operating process utilizing syringe needle retracting device of the present utility model to reclaim blood taking needle is described referring to Figure 14 ~ Figure 17.
First by blood taking needle 3 conventionally in mode be installed on needle holder assembly 1.Then, hand-held needle holder assembly 1 completes passages through which vital energy circulates puncture.Then, conventionally known mode of operation, inserts vacuum test tube in needle holder assembly 1, and automatically completes blood specimen collection under vacuum.If need to gather multiple blood sample, employing of taking off like that can be conventionally known is managed, and changes new vacuum test tube and continues sampling.So repeatedly, until collect all blood samples of needs.
Then, recovery tube assembly 2 is injected in needle holder assembly 1.When the front end of recovery tube assembly 2 close to needle holder assembly 1, produce certain resistance because pair fastened component of first wherein starts to engage, at this moment continue to push ahead recovery tube assembly 2.Under the synergy of separating member and first pair of fastened component, the Compress Spring in recovery tube assembly 2 is released, and produces the pulling force drawn in by blood taking needle in needle holder assembly 1/ recovery tube assembly 2.Then, the syringe needle retracting device of the blood taking needle containing useful mistake can be disposed, and unexpected stabbing can not be caused.
Concrete structure of the present utility model is described above with reference to detailed description of the invention shown in the drawings, but, those skilled in the art should understand that, specific descriptions are above citing character, those skilled in the art are according to description above, various modification and improvement can be made, and scope of the present utility model can not be departed from.
Claims (15)
1. a syringe needle retracting device, is characterized in that, comprising:
Needle holder assembly (1), it comprises:
For the joint (10) of fixed needle;
The needle holder cylinder (11) of hollow; With
For fixing the plinth (12) of described joint (10) separably, described plinth (12) is formed in one end of described needle holder cylinder (11); And
Can put into the recovery tube assembly (2) in described needle holder cylinder (11), it comprises:
Outside recovery tube (20), it has open end (201) and closed end (202);
Internal recovering pipe (21), it has the first open end (211) and the second open end (212), and internal recovering pipe (21) to be contained at least in part in outside recovery tube (20) and to be fixedly connected with outside recovery tube (20);
Compress Spring (22), it is positioned between outside recovery tube (20) and internal recovering pipe (21), and one end of Compress Spring (22) is fixedly attached to internal recovering pipe (20);
Sliding part (23), it to be contained at least in part in inner recovery tube (20) and can the other end of backstop Compress Spring (22); With
Piston rod component (24), it has the first end (241) of the first open end (211) being fixed on internal recovering pipe (21) separably and is positioned at internal recovering pipe (21) and the second end (242) engaged with sliding part (23);
Wherein, first pair of fastened component (105,246) be respectively formed on joint (10) and on the first end (241) of piston rod component (24), when recovery tube assembly (2) in needle holder cylinder (11) near joint (10) time, first pair of fastened component (105,246) can engage joint (10) and piston rod component (22) to be fixed together;
First separating member (14) be formed in plinth (12) side of needle holder cylinder (11) and joint (10) the two one of on, when recovery tube assembly (2) in needle holder cylinder (11) near joint (10) time, first separating member (14) can the first end (241) of engaging piston bar component (24) the first end (241) of piston rod component (24) be separated with first open end (211) of internal recovering pipe (21)
First pair of fastened component (105,246) relative position of and the first separating member (14) is set to when first pair of fastened component (105,246) after engaging, the first separating member (14) engaging piston bar component (24).
2. syringe needle retracting device as claimed in claim 1, it is characterized in that, closed end (202) inner side of outside recovery tube (20) is provided with the clamping device of the second open end (212) for clamping internal recovering pipe (21), be provided with the outwardly outstanding notch cuttype flange (206) from internal recovering pipe near the first end (211) of internal recovering pipe (21), the open end (201) of outside recovery tube (20) and one end of Compress Spring (22) are fixedly attached to notch cuttype flange (206) respectively.
3. syringe needle retracting device as claimed in claim 1, it is characterized in that, internal recovering pipe (21) is provided with longitudinal chute (213), and sliding part (23) can slide by chute (213) along the longitudinal.
4. syringe needle retracting device as claimed in claim 3, it is characterized in that, sliding part (23) comprises main body (231), the projection (232) of outwardly projection of autonomous agent (231) and the card (233) of the inside projection of inner surface of autonomous agent (231), projection (232) can through longitudinal chute (213) the backstop Compress Spring (22) on internal recovering pipe (21), and card (233) can engage with the second end of piston rod component (24) (242).
5. syringe needle retracting device as claimed in claim 1, it is characterized in that, the first end (241) of piston rod component (24) is annular wall (243).
6. syringe needle retracting device as claimed in claim 5, it is characterized in that, the annular wall (243) of piston rod component (24) is formed with multiple groove (247), makes the annular wall between adjacent slot (243) part form cantilever design.
7. syringe needle retracting device as claimed in claim 5, it is characterized in that, first pair of fastened component (105,246) the hook-shaped fastened component (105) be formed on joint (10) and the hook-shaped fastened component (246) be formed on piston rod component (24) is comprised
Fastened component (246) on piston rod component (24) comprises the snap-latch surface (225) of the rear end of the guide surface (224) of the front end of the inner peripheral surface being formed in annular wall (243) and the inner peripheral surface of formation annular wall (223)
Fastened component (105) on joint (10) is formed in the part exceeding plinth (12) of joint (10), comprises towards the snap-latch surface of front end (107) and the guide surface (106) towards rear end.
8. syringe needle retracting device as claimed in claim 7, it is characterized in that, in the fastened component (105) of joint (10) and the fastened component (246) of piston rod component (24), the guide surface of at least one is wedge shape.
9. syringe needle retracting device as claimed in claim 5, is characterized in that,
Piston rod component (24) comprises the second separating member, and the second separating member comprises the parting surface (249) of the front end of the outer peripheral face being formed in annular wall (243),
First separating member (14) comprises the parting surface (142) that can engage with the parting surface of the second separating member (249),
In the parting surface (142) of the first separating member (14) and the parting surface (229) of the second separating member, at least one is wedge shape.
10. syringe needle retracting device as claimed in claim 5, is characterized in that,
The inner surface of the first open end (211) side of internal recovering pipe (21) is formed with step (214),
The rear end of the outer peripheral face of the annular wall (243) in piston rod component (24) is formed with the shoulder (248) that can lean against on described step (214).
11. syringe needle retracting devices as claimed in claim 1, it is characterized in that, also comprise second pair of fastened component (15, 215), second pair of fastened component (15, 215) be respectively formed on needle holder cylinder (11) nipple seat (12) side with on internal recovering pipe (21), when recovery tube assembly (2) in needle holder cylinder (11) near plinth (12) time, second pair of fastened component (15, 215) can engage and needle holder cylinder (11) and internal recovering pipe (21) are fixed together, wherein, second pair of fastened component (15, 215) relative position of and the first separating member (14) is set to when second pair of fastened component (15, 215) after engaging, first separating member (14) engaging piston bar component (24).
12. syringe needle retracting devices as claimed in claim 11, it is characterized in that, second pair of fastened component (15,215) the hook-shaped fastened component (15) be formed in needle holder cylinder (11) and the hook-shaped fastened component (215) be formed on internal recovering pipe (21) is comprised
Fastened component (15) in needle holder cylinder (11) is formed by the flange on the inner surface of needle holder cylinder (11), comprise towards the snap-latch surface of front end (152) and the guide surface (151) towards rear end
Fastened component (215) on internal recovering pipe (21) is formed by the flange on the first open end (211) the side outer peripheral face of internal recovering pipe (21), comprises towards the guide surface of front end (217) and the snap-latch surface (216) towards rear end.
13. syringe needle retracting devices as claimed in claim 12, it is characterized in that, in the fastened component (15) in needle holder cylinder (11) and the fastened component (215) on internal recovering pipe (21), the guide surface of at least one is wedge shape.
14. 1 kinds of needle holder assemblies, for reclaiming syringe needle, is characterized in that, described needle holder assembly comprises:
For the joint (10) of fixed needle;
The needle holder cylinder (11) of hollow;
For the plinth (12) of anchor tip (10) separably, plinth (12) is formed in one end of needle holder cylinder (11);
Fastened component (105), it is formed in the part exceeding plinth (12) of joint (10); And
First separating member (14), its be formed in plinth (12) side of needle holder cylinder (11) and joint (10) the two one of on.
15. 1 kinds of recovery tube assemblies, for reclaiming syringe needle, is characterized in that, described recovery tube assembly comprises:
Outside recovery tube (20), it has open end (201) and closed end (202);
Internal recovering pipe (21), it has the first open end (211) and the second open end (212), and internal recovering pipe (21) to be contained at least in part in outside recovery tube (20) and to be fixedly connected with outside recovery tube (20);
Compress Spring (22), it is positioned between outside recovery tube (20) and internal recovering pipe (21), and one end of Compress Spring (22) is fixedly attached to internal recovering pipe (20);
Sliding part (23), it to be contained at least in part in inner recovery tube (20) and can the other end of backstop Compress Spring (22);
Piston rod component (24), it has the first end (241) of the first open end (211) being fixed on internal recovering pipe (21) separably and is positioned at internal recovering pipe (21) and the second end (242) engaged with sliding part (23); And
Fastened component (246), it is formed on the first end (241) of piston rod component (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420801764.6U CN204544948U (en) | 2014-12-17 | 2014-12-17 | Syringe needle retracting device and needle holder assembly and recovery tube assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420801764.6U CN204544948U (en) | 2014-12-17 | 2014-12-17 | Syringe needle retracting device and needle holder assembly and recovery tube assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204544948U true CN204544948U (en) | 2015-08-12 |
Family
ID=53820114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420801764.6U Withdrawn - After Issue CN204544948U (en) | 2014-12-17 | 2014-12-17 | Syringe needle retracting device and needle holder assembly and recovery tube assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204544948U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016095818A1 (en) * | 2014-12-17 | 2016-06-23 | 千禧光医疗有限公司 | Needle recovery device, needle holder assembly, and recovery tube assembly |
| WO2016095819A1 (en) * | 2014-12-17 | 2016-06-23 | 千禧光医疗有限公司 | Recovery device for needle and needle holder assembly and recovery tube assembly |
-
2014
- 2014-12-17 CN CN201420801764.6U patent/CN204544948U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016095818A1 (en) * | 2014-12-17 | 2016-06-23 | 千禧光医疗有限公司 | Needle recovery device, needle holder assembly, and recovery tube assembly |
| WO2016095819A1 (en) * | 2014-12-17 | 2016-06-23 | 千禧光医疗有限公司 | Recovery device for needle and needle holder assembly and recovery tube assembly |
| CN105880256A (en) * | 2014-12-17 | 2016-08-24 | 千禧光医疗有限公司 | Needle recovery device, needle holding assembly and recovery pipe assembly |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150812 Effective date of abandoning: 20181002 |
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| AV01 | Patent right actively abandoned |