WO2014019198A1 - Syringe type vacuum blood collector with protective needle tip - Google Patents

Abstract

A syringe type vacuum blood collector with a protective needle tip comprises a vascular puncture needle tube (11), a blood collection needle tube (12), a blood sample collection pipe (2), and a syringe (3). A tail end of the vascular puncture needle tube (11) is eccentrically inserted on a puncture needle seat (13) in a manner of closing an outer circumferential surface of the syringe (3). The syringe has a seal cavity (32) and a cylindrical cavity (33) inside. The vascular puncture needle tube (11) communicates with the seal cavity (32), a front end of the blood collection needle tube (12) is fixedly arranged onto a wall of the seal cavity and communicates with the seal cavity (32), and a rear end of the blood collection needle tube (12) and most of the syringe extend backwards and are inserted in a pipe plug of the blood sample collection pipe (2). A tube plug of the vascular puncture needle tube (11), the seal cavity (32), a pipe core of the blood collection needle tube (12), and a pipe cavity of the blood sample collection pipe (2) whose seal cavity is punctured form a blood channel. A sliding groove (36) with a tail end where a back barrier is arranged extends in an axial direction on the side wall of the syringe (3), and a push handle (132) of a puncture needle seat protrudes from the sliding groove (36) and is exposed outside the syringe (3). The puncture needle tube (11), the puncture needle seat (13), the blood collection needle tube (12), and the collection pipe (2) form a sliding member sliding back relative to the syringe (3). With the regression of the sliding member, the puncture needle tube (11) is retracted into an inner cavity of the syringe (3), thereby ensuring that a person is not hurt.

Description

 Needle-type vacuum blood collection device with needle tip protection Technical field

 The invention relates to a human external vacuum blood collection device for clinical medical treatment, in particular to a syringe vacuum blood collection device with needle tip protection.

 Background technique

 A vacuum blood collection tube device of the prior art is shown in Fig. 1 and Fig. 2, and includes a blood collection needle and a blood sample collection tube. One end of the blood collection needle is a vascular puncture needle 11 and the other end is provided with a rubber sleeve blood collection needle 12, and the middle is connected by a PVC catheter. When the device is used for collecting blood, first remove the protective sleeve on the two needles and puncture the needle into the needle 11 Pierce the patient's arm vein, wait for the blood to enter the blood collection tube, and the medical staff immediately press the needle handle of the blood vessel needle 11 with the little finger to prevent the needle tube from falling off; because the blood sample collection tube 2 The sealing rubber plug is very thick, and the blood collecting needle 12 has a large angle of the bevel, the needle tip is blunt, and the blood collecting needle 12 is tight when the sealing tube is subjected to axial compression, so the hands need to be used to take the blood collecting needle 12 Piercing into the blood sample collection tube is quite inconvenient to operate. Due to blood sample collection tube 2 The inside is negative pressure and the blood flows into the collection tube at a faster rate. To collect the required sample volume, if multiple blood samples need to be collected, the blood collection needle 12 can be pulled out from the collection tube 2 by both hands. At this time, the blood collection tube 12 The outer soft rubber sleeve is restored, and the blood collection needle tube is wrapped to prevent the blood in the catheter from flowing out to pollute the environment, and then the previous intubation operation is repeated; if it is not necessary to draw blood, the human needle on the human body must be pulled out first. Then, put on the needle tip sheath, and then remove the blood collection needle 12 on the collection tube 2 . This shows that the vacuum blood collection device is due to the blood collection needle and the collection tube 2 Split structure, the blood collection process needs to take care of the two needles of the catheter at the same time, resulting in complicated and cumbersome operation. Multiple operation steps even require both hands and a certain and just enough force is required to complete the extraction and insertion of the needle tube. The needle at the other end cannot be taken care of, which in turn involves the coordinated operation of more than one medical staff. This complicated and cumbersome operation and the presence of two needles, Invisibly increases the workload and psychological burden of medical staff, and it is prone to misuse in the case of patients with unconsciousness, incitement, uncooperative patients, and infants and children with large physical activity. After the end of the puncture, the exposed needle tip of the puncture needle is not safe and easy to stab, causing a safety hazard.

 Summary of the invention

The object of the present invention is to overcome the deficiencies in the prior art, and to provide a syringe-type vacuum blood collection device with a needle tip protection, which is simple in structure, simple in operation, and safe in protecting the puncture needle tube after the puncture is completed.

 The object of the present invention is achieved by the following route.

 Needle-type vacuum blood collection device with needle tip protection The invention comprises a vascular puncture needle tube, a blood collection needle tube and a blood sample collection tube, and the main point of the composition is that the utility model further comprises a syringe tube, and the tail end of the blood vessel puncture needle tube is eccentrically inserted on the puncture needle holder in a manner close to the outer circumferential surface of the syringe barrel, The needle tip of the needle tube and most of the needle tube are exposed outside the barrel, and the inside of the barrel has a sealed cavity and a cylindrical cavity, wherein the sealing cavity is located in front of the cylindrical cavity, and the die of the vascular puncture needle is connected with the sealing cavity The front end of the blood collection needle tube is fixed on the wall of the sealing chamber, and the rear end and the needle tube are mostly extended backward and inserted into the tube plug of the blood sample collection tube, and the tube of the blood collection needle tube communicates with the sealing chamber, and the tube shape is empty The cavity is located behind the sealed cavity and the rear end thereof is open, and the blood sample collection tube is inserted in the cartridge cavity in a removable manner, and the blood sample collection tube plug has a rear wall Sealing layer pierced at the back end of the blood collection needle , The cylindrical cavity of the front end face of the blood sample collection tube has a space for accommodating the blood sample collection tube that is pushed forward by the piercing of the sealing layer, the vascular puncture needle tube die, the sealing cavity, the blood collection needle tube die, and the pierced sealing layer The blood sample collection tube lumen forms a blood passage, and the puncture needle seat is located in the inner cavity of the syringe inner side of the needle barrel, and the inner cavity of the puncture needle seat is a sealed cavity, and the axial side of the needle barrel extends axially. The tail end is provided with a sliding groove with a retreating obstacle, and the puncture needle pushing handle protrudes out of the sliding groove and is exposed outside the barrel, and the axial length of the inner cavity of the syringe is larger than the length of the puncture needle tube exposed outside the syringe, and the puncture needle tube The puncture needle holder, the blood collection needle tube and even the collection tube form a sliding member that can slide back relative to the syringe, and retracts into the inner cavity of the syringe with the retracting needle of the sliding member.

In this way, the vascular puncture needle tube, the blood collection needle tube and the blood sample collection tube are rigidly coupled by a syringe, so that the three are not only integrally constructed but also constitute a traditional syringe structure, the structure is simplified, the holding operation is convenient, and the operation process is the same as that of the traditional syringe. The operation is extremely similar.

When collecting blood, hold the syringe and puncture the vascular puncture needle into the vein of the patient's arm. When seeing the blood return, hold the syringe in one hand, or the other hand or the other finger in front of the blood sample collection tube, so that the back end of the blood collection needle is pierced. The blood sample collects the sealing layer of the tube plug, and the blood flows into the collecting tube at a faster rate due to the negative pressure of the blood sample collecting tube lumen. To collect the required sample volume, if you need to collect multiple blood samples, you only need to pull the collection tube out of the cylindrical cavity with one hand. At this time, the blood collection tube is restored by a soft rubber sleeve. Live the blood collection tube to prevent the blood from flowing out of the catheter to pollute the environment, and then take out the new blood sample collection tube; if it is not necessary to draw blood, simply pull out the puncture needle on the human body, put on the needle tip sheath, and then remove the collection tube. Just fine.

At the end of blood collection, the puncture needle holder and the puncture needle can be pushed along the sliding groove until the puncture needle tube is completely immersed in the syringe, and the syringe is used as a protective sleeve. The retraction obstacle at the end of the sliding groove can prevent the retracted puncture needle seat and the puncture needle from passing through the syringe. The backlash can be a snap point protruding at the end of the sliding slot or a closed end of the sliding slot.

 The object of the present invention can also be achieved by the following means.

 Further optimization of the syringe cover of the present invention is:

Also included is a backstop that is mounted between the sliding member and the barrel, and the sliding member that retracts to retract the needle into the barrel lumen will resist contact with the backstop if pushed forward.

Thus, the sliding member that is retracted in position cannot be pushed forward due to the blocking of the check device. Therefore, it is ensured that the retracted puncture needle can no longer be pulled out, and the syringe vacuum blood collection device of the present invention can be used for one-time use.

Such backstop devices are common in prior art needle medical devices and are mostly applicable to the present invention. The present invention provides two optimized backstop devices:

The backstop device is an elastic symmetric closing tongue which is installed in the inner cavity of the syringe in front of the puncture needle seat, and the end of the puncture needle is passed through the closing joint of the closing tongue and fixed on the puncture needle seat.

 Thus, after the puncture needle is withdrawn, the tongue elastically resets the original puncture needle tube outlet.

The backstop device is composed of an elastic buckle and a concave hole, and the elastic buckle is located on the syringe barrel, and the concave hole is located on the sliding member, and the sliding member that is retracted into position has the concave hole just engaged with the elastic buckle, thereby preventing the puncture needle tube from being pushed forward. .

The elastic buckle is composed of a elastic suspension tongue and a buckle at the top end of the tongue. The tail end of the sliding groove of the cylinder is hollowed out at a distance parallel to the sliding groove and is hollowed out at the end of the sliding groove and the sliding groove 'U' Shaped wear, this 'U The center of the shape forms a resilient suspension tongue, and the buckle is located at the top end of the elastic suspension tongue and protrudes in the sliding groove, and the concave hole is located on the push handle of the puncture needle holder.

 The puncture needle holder push back in position along the sliding groove, and the recess is just engaged with the buckle.

 Further optimization of the syringe vacuum blood collection structure of the present invention is:

 A vascular puncture needle disposed adjacent to the outer circumferential surface of the barrel and extending forward is parallel to the center of the syringe.

 The sealed cavity at the front of the syringe is a blood returning cavity, and the outer peripheral surface of the syringe has a see-through portion for observing blood return at a position matching the sealing cavity.

The front end portion of the syringe has a wedge shape which is extended downwardly and downwardly. The blood vessel puncture needle tube is fixed to the needle barrel at the lower end of the wedge shape, and the see-through portion of the blood returning body can be observed on the inclined surface of the wedge shape.

 The upper end of the wedge-shaped bevel intersects the outer peripheral surface of the barrel, and the lower end of the wedge-shaped bevel forms a small boss A near the outer circumferential surface of the barrel. The end of the vascular puncture needle is fixed to the syringe through the boss A.

 Thus, the wedge-shaped bevel is facing the operator who is leaning over and is easy to observe.

 The see-through portion can be made of a transparent material.

 The back cover of the sealing chamber has a small boss B, and the front end of the blood collecting needle tube is fixed on the boss B.

 The blood collection needle is concentrically arranged with the syringe and extends rearward along the center of the syringe.

The blood collection needle tube is covered with a blood collection sealing sleeve, and the blood sample collection tube tube plug center is provided with a core hole extending axially to the sealing layer, and the inner diameter of the core hole is slightly larger than the outer diameter of the blood collection sealing sleeve.

In this way, when the blood collection needle tube and the blood collection sealing tube penetrate the tube plug along the core hole, the blood collection sealing sleeve is subjected to the axial compression compression and the radial distortion expansion deformation, which is just pressed and rubbed against the inner hole wall of the core hole, and the blood collection needle tube is not allowed. Take out the blood sample collection tube plug.

 The blood sample collection tube plug sealing layer has a thickness of 3-0.5 MM, preferably 1.5-0.5 MM.

 This allows the blood collection tube to easily penetrate the sealing layer.

The cylindrical cavity has a configuration adapted to the blood sample collection tube plug, which not only facilitates the loading and unloading of the blood sample collection tube, but also forms a tight connection with the blood sample collection tube plug. relationship.

A further optimization of this configuration may be such that the blood sample collection tube is inserted into the cylindrical cavity and the adapted configuration is a dimensionally transitionally coupled configuration.

It may also be that the inner wall of the cylindrical cavity is symmetrically disposed circumferentially symmetrically with the elastic contact of the blood sample collection tube plug, and when the two are in the contact state, the rear end of the blood collection needle is just to be pierced. Before the sealing layer.

In this way, it is convenient for the blood sample collection tube inserted in the cylindrical cavity to not fall off when standing upright, and the degree of insertion of the blood sample collection tube installed in the cylindrical cavity is given from the touch, thereby facilitating installation.

 The elastic snap configuration can be a short arc cam or the blood sample collection tube plug is made of a resilient material.

The elastic snap-in configuration can cause an elastic tight connection between the inner wall of the cylindrical cavity and the plug, but the blood sample collection tube can still be pushed forward or backward relative to the cylindrical cavity when an axial force is applied.

Such short arc convex card points, as the name suggests, are bumps protruding from the inner wall of the cylindrical cavity, the thickness is low and the front and rear sides have curved transitions to facilitate the crawling of the pipe plug.

It is also possible to add other fitting connection structures on the basis of the elastic snap-in configuration to achieve better use effect. The following is one of the optimized use:

The configuration in the cylindrical cavity that fits the plug is a plurality of elastic snap contacts that are circumferentially distributed or symmetrically distributed along the inner wall of the cylindrical cavity, and another suitable configuration is made in the tube. L on the outer circumference of the plug a groove and a projecting point formed on the inner wall of the cylindrical cavity, the protruding point entering from the end of the vertical section of the L-shaped groove at the front end face of the pipe plug The groove can slide therein, and when the inner wall of the cylindrical cavity is elastically caught by the pipe plug, the protruding point has entered L In the vertical section of the shaped groove but not yet reaching the bottom end of the vertical section, the rear end of the blood collection needle tube is just before the sealing layer to be pierced, and after the current blood sample collection tube to the blood collection needle tube pierces the sealing layer, The protruding point just reaches the bottom end of the vertical section, at this time, the blood sample collection tube is rotated, and the protruding point enters A cross-section in an L-shaped groove.

 In this way, L The cross-section in the slot can lock the freedom of the blood sample collection tube in the axial direction so that it can neither push forward nor retreat relative to the syringe.

 It may again be that the blood sample collection tube is threaded into the cylindrical cavity and the adapted configuration is a threaded connection configuration.

The blood sample collection tube plug is composed of a sealing rubber plug and a protective cover, the sealing rubber plug is plugged in the collecting tube lumen, and the protective cover is plugged on the collecting tube nozzle and the sealing rubber plug.

 The configuration adapted to the cylindrical cavity is generally provided on the protective cover.

 The length of the cylindrical cavity is less than the length of the blood sample collection tube, and the tail of the blood sample collection tube nested in the cylindrical cavity is exposed outside the cylindrical cavity.

A contact surface is disposed on the outer peripheral surface of the side of the needle barrel adjacent to the vascular puncture needle tube, and the bottom surface of the contact table has a concave shape or a concave curved shape which is adapted to the elbow of the human body.

 The contact table facilitates the contact between the syringe and the human body, and increases the friction between the syringe and the human skin, so that the syringe is not easily slipped.

A flexible applicator is disposed on the outer peripheral surface of the side of the needle tube adjacent to the vascular puncture needle tube. The soft applicator is fixed to the syringe, and has wings on both sides, and the bottom surface of the wing is a flat shape or a A concave curved shape that fits the elbow of the human body.

 The application of the blade facilitates the contact between the syringe and the human body, and increases the friction between the syringe and the human skin, so that the syringe is not easily slipped.

 It is also possible to further provide a viscous glue dot on the bottom surface of the wing.

In summary, the present invention has the following advantages over the prior art: the structure is simplified, the holding operation is convenient, and the operation process is extremely similar to the operation of the conventional syringe, and the operation is minimized. The workload and psychological burden of medical staff, even in the case of patients with unconsciousness, incitement, uncooperative patients and infants and children with large physical activity, are not prone to misuse, thus improving the safety of operation and Success. And the further involvement of the security structure, Thereby, it is ensured that the retracted puncture needle tube is immersed in the protective sleeve without stabbing the person, and the single use of the syringe type vacuum blood collection device according to the present invention can also be promoted.

 DRAWINGS

 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the insertion state of a blood sample collection tube of a vacuum blood collection tube apparatus in the prior art.

 Fig. 2 is a schematic view showing the state in which the blood sample collection tube of the vacuum blood collection tube device is withdrawn in the prior art.

 Fig. 3 is a perspective view showing the appearance of a needle-type vacuum blood collection device having a needle tip protection according to the present invention.

 Fig. 4 is a schematic cross-sectional front view showing the structure of a syringe type vacuum blood collection device having a needle tip protection according to the present invention.

 Fig. 5 is a schematic cross-sectional plan view showing the structure of a syringe type vacuum blood collection device having a needle tip protection according to the present invention.

 Fig. 6 is a view showing the state after blood collection of the needle-type vacuum blood collection device with needle tip protection according to the present invention.

 Fig. 7 is a schematic cross-sectional front view showing the structure of a front end cover in a needle-type vacuum blood collection device having a needle tip protection according to the present invention.

 Figure 8 is a schematic cross-sectional left side view showing the structure of the front end cover in the needle-type vacuum blood collection device with needle tip protection of the present invention.

 The present invention will be described in more detail below with reference to the accompanying drawings.

 Label description:

 11 puncture needle 12 blood collection needle 13 puncture needle holder 131 boss B 132 push handle 15 blood collection gland 2 Blood sample collection tube 21 Sealing layer 22 Sealant plug 23 Protective cover 3 Syringe 31 Boss A 32 Sealing chamber 33 Cylindrical cavity 34 Short arc cam profile 35 Operating window 36 Sliding groove 4 Wing 5 Close the tab 6 Front end cover.

 detailed description

 Best embodiment:

 Referring to Figure 3, Figure 4, Figure 5, a needle-type vacuum blood collection device with needle tip protection, including a vascular puncture needle 11 and a blood collection needle tube 12, blood sample collection tube 2 and syringe 3, the syringe 3 is a hollow cylindrical shell, made of medical transparent material, the front end cover 6 The front end portion has a wedge shape which is downwardly extended, and the upper end of the wedge-shaped inclined surface intersects with the outer circumferential surface of the barrel, and the downward end of the wedge-shaped inclined surface is near the outer circumferential surface of the barrel (ie, near the inner side edge of the housing) Position forms a small boss A31 , the boss A31 is provided with a puncture needle in the center. 11 A through hole is installed, and the puncture needle 11 is fixed through the mounting through hole and the puncture needle holder 13 at the front end of the inner cavity of the syringe 3 behind the mounting through hole, and the puncture needle 11 Parallel to the center of the syringe 3 but eccentrically distributed, the tip of the needle and most of the needle are exposed outside the syringe 3. The barrel 3 has a sealed cavity 32 and a cylindrical cavity 33 therein, wherein the sealed cavity 32 Located at the front end of the barrel, the wick of the puncture needle 11 communicates with the sealed chamber 32. The puncture hub 13 is a separate component from the syringe 3 and is made of medical transparent material and placed in the syringe 3 The inner cavity of the front end of the inner cavity is a sealed cavity 32, and the rear side of the rear wall of the sealing cavity 32 has a small boss B131, and the front end of the blood collection needle 12 is fixed on the boss B131. The upper end, the rear end and the needle tube extend mostly rearwardly and are inserted into the plug of the blood sample collection tube 2, and the wick of the blood collection needle tube 12 communicates with the sealed chamber 32, and the blood collection needle tube 12 is coaxial with the cylindrical cavity 33. Blood collection needle 12 The outer cover is covered with a blood collection sealing sleeve 15. The center of the blood sample collection tube plug is provided with a core hole extending axially to the sealing layer 21, and the inner diameter of the core hole is slightly larger than the outer diameter of the blood collection sealing sleeve 15. Thus, the blood collection tube 12 With the same blood collection sealing sleeve 15 When the tube hole is inserted into the tube plug, the blood collection sealing sleeve 15 is subjected to axial compression and compression, and is radially twisted and expanded and deformed, and just squeezes and rubs against the inner hole wall of the core hole, and does not allow the blood collection needle tube 12 Take out the blood sample collection tube plug. The cylindrical cavity 33 is located behind the sealed chamber 32 and its rear end is open, and the blood sample collection tube 2 is plugged in the front insert sleeve in the cylindrical cavity 33, and the cylindrical cavity 32 The length of the blood sample collection tube 2 is smaller than the length of the blood sample collection tube 2, and the tail of the blood sample collection tube 2 housed in the cylindrical cavity 32 is exposed outside the cylindrical cavity. The blood sample collection tube plug is made of a sealing plug 22 and a protective cover 23 The sealing plug 22 is sleeved in the collecting tube lumen, the protective cover 23 is plugged on the collecting tube nozzle and the sealing rubber plug, and the blood sample collecting tube 2 has a blood collecting needle 12 rear end Pierced sealing layer 21, the sealing layer has a thickness of 1.5 mm, and the cylindrical cavity 33 of the front end surface of the blood sample collection tube 2 has a space for accommodating the blood sample collection tube 2 which is pushed forward by the sealing layer 21, and the cylindrical cavity 33 The inner wall is symmetrically disposed circumferentially symmetrically with the elastic contact of the blood sample collection tube 2 protection cover 23, and when the two are in the state of the card contact, the blood collection needle 12 The rear end is just in front of the sealing layer to be pierced. The elastic snap contact structure is a short arc convex click point 34, the short arc convex click point 34 and the protective cover 23 Made of elastic material. The puncture needle tube die, the sealing cavity, the blood collection needle tube die, and the blood sample collection tube lumen after being pierced by the sealing layer constitute a blood channel.

 Referring to Fig. 3, a sliding groove 36 is defined axially extending on the side wall of the syringe 3, and the sliding needle pushing handle 132 protrudes out of the sliding groove. 36 and exposed outside the syringe 3. The sliding groove 36 extends from the front of the barrel 3 to the rear of the barrel 3, and the protective cover 23 of the blood sample collection tube 2 nested in the cylindrical cavity 33 is located in the sliding groove In the length interval of 36, therefore, the sliding groove 36 is at the same time the operation window 35. The axial length of the inner cavity of the syringe 3 is larger than the length of the puncture needle 11 exposed outside the syringe 3, and the puncture needle 11 The puncture needle holder 13, the blood collection needle 12 and even the blood sample collection tube 2 constitute a sliding member that can slide back relative to the syringe 3.

 Referring to Fig. 6, when the blood collection is finished, the puncture needle holder 13 and the puncture needle 11 can be pushed along the sliding groove until the puncture needle 11 Completely immersed in the inner cavity of the syringe 3. At this time, the blood sample collection tube 2 can be pulled out to be detached from the syringe 3.

 Referring to Figures 6, 7, and 8, there is further provided a backstop device which is an elastic symmetric closed tongue 5 Installed in the inner cavity of the syringe 3 in front of the puncture needle holder 13, the end of the puncture needle 11 is passed through the closed joint of the closing tongue 5 and fixed to the puncture needle holder 13.

 Thus, after the puncture needle is withdrawn, the closing tongue 5 elastically resets the original puncture needle 11 Export. Blocking, sliding parts that are back in place will not be pushed forward. Thereby ensuring the retracted puncture needle 11 The wounded person of the present invention can be promoted to be used once, and can not be used again by criminals.

 Referring to Fig. 3, Fig. 4, Fig. 5, the needle tube 3 near the puncture needle tube 3 is provided with a soft applicator on the outer peripheral surface of the side 4 The soft flap 4 has a wingspan on both sides, and the bottom surface of the flap has a concave arc shape adapted to the elbow of the human body, and the bottom surface of the flap 4 is provided with a viscous glue point.

 The parts not described in this embodiment are the same as the prior art.

Claims (24)

1. Needle-type vacuum blood collection device with needle tip protection The invention comprises a vascular puncture needle tube, a blood collection needle tube and a blood sample collection tube, characterized in that the utility model further comprises a syringe tube, and the tail end of the blood vessel puncture needle tube is eccentrically inserted on the puncture needle holder in a manner close to the outer circumferential surface of the syringe barrel, the needle tube The tip of the needle and most of the needle tube are exposed outside the barrel, and the inside of the barrel has a sealed cavity and a cylindrical cavity, wherein the sealing cavity is located in front of the cylindrical cavity, and the die of the vascular puncture needle is in communication with the sealing cavity. The front end of the blood collection needle tube is fixed on the wall of the sealing chamber, and the rear end and the needle tube are mostly extended backward and inserted into the tube plug of the blood sample collection tube. The tube of the blood collection needle tube communicates with the sealing chamber, and the cylindrical cavity Located at the rear of the sealed chamber and open at the rear end thereof, the blood sample collection tube is inserted in the cylindrical cavity in a removable manner, and the blood sample collection tube plug has a blood collection wall Sealing layer pierced at the back end of the needle tube , The cylindrical cavity of the front end face of the blood sample collection tube has a space for accommodating the blood sample collection tube that is pushed forward by the piercing of the sealing layer, the vascular puncture needle tube die, the sealing cavity, the blood collection needle tube die, and the pierced sealing layer The blood sample collection tube lumen forms a blood passage, and the puncture needle seat is located in the inner cavity of the syringe inner side of the needle barrel, and the inner cavity of the puncture needle seat is a sealed cavity, and the axial side of the needle barrel extends axially. The tail end is provided with a sliding groove with a retreating obstacle, and the puncture needle pushing handle protrudes out of the sliding groove and is exposed outside the barrel, and the axial length of the inner cavity of the syringe is larger than the length of the puncture needle tube exposed outside the syringe, and the puncture needle tube The puncture needle holder, the blood collection needle tube and even the collection tube form a sliding member that can slide back relative to the syringe, and retracts into the inner cavity of the syringe with the retracting needle of the sliding member.
2. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein Also included is a backstop that is mounted between the sliding member and the barrel, and the sliding member that retracts to retract the needle into the barrel lumen will resist contact with the backstop if pushed forward.
3. A needle-type vacuum blood collection device with needle tip protection according to claim 2, wherein The backstop device is an elastic symmetric closed tongue, which is installed in the inner cavity of the syringe in front of the puncture needle seat, and the end of the puncture needle is passed through the closed joint of the closing tongue and fixed on the puncture needle seat. After the puncture needle is withdrawn, the elastic return of the tongue blocks the outlet of the original puncture needle.
4. A needle-type vacuum blood collection device with needle tip protection according to claim 2, wherein The backstop device is composed of an elastic buckle and a concave hole, and the elastic buckle is located on the syringe barrel, and the concave hole is located on the sliding member, and the sliding member that is retracted into position has the concave hole just engaged with the elastic buckle, thereby preventing the puncture needle tube from being pushed forward. .
5. A needle-type vacuum blood collection device with needle tip protection according to claim 4, wherein The elastic buckle is composed of a elastic suspension tongue and a buckle at the top end of the tongue. The tail end of the sliding groove of the cylinder is hollowed out at a distance parallel to the sliding groove and is hollowed out at the end of the sliding groove and the sliding groove 'U' Shaped wear, this 'U The center of the shape forms a resilient suspension tongue. The buckle is located at the top end of the elastic suspension tongue and protrudes in the sliding groove. The concave hole is located on the push handle of the puncture needle seat, and the puncture needle seat push handle which is retracted into position along the sliding groove, The pocket is just snapped into this snap.
6. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein A vascular puncture needle disposed adjacent to the outer circumferential surface of the barrel and extending forward is parallel to the center of the syringe.
7. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein The sealed cavity at the front of the syringe is a blood returning cavity, and the outer peripheral surface of the syringe has a see-through portion for observing blood return at a position matching the sealing cavity.
8. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein The front end portion of the syringe has a wedge shape which is extended downwardly and downwardly. The blood vessel puncture needle tube is fixed to the needle barrel at the lower end of the wedge shape, and the see-through portion of the blood returning body can be observed on the inclined surface of the wedge shape.
9. A needle-type vacuum blood collection device with needle tip protection according to claim 8, wherein The upper end of the wedge-shaped inclined surface intersects with the outer peripheral surface of the barrel, and the lower end of the wedge-shaped inclined surface forms a small boss A at a position close to the outer circumferential surface of the barrel, and the end of the blood vessel needle passes through the boss A Secured to the syringe.
10. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein the sealing chamber has a small boss B on the back cover The front end of the blood collection needle is fixed on the boss B.
11. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein The blood collection needle is concentrically arranged with the syringe and extends rearward along the center of the syringe.
12. A needle-type vacuum blood collection device with needle tip protection according to claim 1 or 11, wherein The blood collection needle tube is covered with a blood collection sealing sleeve, and the blood sample collection tube tube plug center is provided with a core hole extending axially to the sealing layer, the inner diameter of the core hole is slightly larger than the outer diameter of the blood collection sealing sleeve, and the blood collection needle tube is taken along with the blood collection sealing tube When the core hole penetrates the pipe plug, the blood collection sealing sleeve is subjected to axial compression and compression, and is radially twisted and expanded, and is pressed against the inner wall of the core hole.
13. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein the blood sample collection tube plug sealing layer has a thickness of 3-0.5 mm .
14. A needle-type vacuum blood collection device with needle tip protection according to claim 13, wherein the thickness of the blood sample collection tube plug sealing layer is 1.5-0.5MM.
15. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein The tubular cavity has a configuration adapted to the blood sample collection tube plug, which is coupled with the blood sample collection tube plug to form a tight connection relationship, and the blood sample collection tube is loaded and unloaded through the structure. Cavity.
16. A needle-type vacuum blood collection device with needle tip protection according to claim 15, wherein The blood sample collection tube is inserted into the cylindrical cavity, and the adapted configuration is a configuration of a dimensionally mating coupling.
17. A needle-type vacuum blood collection device with needle tip protection according to claim 15, wherein The inner wall of the cylindrical cavity is symmetrically disposed circumferentially symmetrically with the elastic contact of the blood sample collection tube plug. When the two are in the contact state, the rear end of the blood collection needle is just in front of the sealing layer to be pierced. The inner wall of the cylindrical cavity is thus elastically and tightly connected to the pipe plug by the elastic snap contact, but the elastic retarding force is smaller than the manually applied axial force.
18. A needle-type vacuum blood collection device with needle tip protection according to claim 17, wherein The elastic snap configuration can be a short arc cam or the blood sample collection tube plug is made of a resilient material.
19. A needle-type vacuum blood collection device with needle tip protection according to claim 18, wherein The short arc convex snap point is a bump protruding from the inner wall of the cylindrical cavity, the thickness is low and the front and rear sides have arc-shaped transitions for facilitating the plug creeping.
20. A needle-type vacuum blood collection device with needle tip protection according to claim 15, wherein The configuration in the cylindrical cavity that fits the plug is a plurality of elastic snap contacts that are circumferentially distributed or symmetrically distributed along the inner wall of the cylindrical cavity, and another suitable configuration is made in the tube. L on the outer circumference of the plug a groove and a projecting point formed on the inner wall of the cylindrical cavity, the protruding point entering from the end of the vertical section of the L-shaped groove at the front end face of the pipe plug The groove can slide therein, and when the inner wall of the cylindrical cavity is elastically caught by the pipe plug, the protruding point has entered L In the vertical section of the shaped groove but not yet reaching the bottom end of the vertical section, the rear end of the blood collection needle tube is just before the sealing layer to be pierced, and after the current blood sample collection tube to the blood collection needle tube pierces the sealing layer, The protruding point just reaches the bottom end of the vertical section, at this time, the blood sample collection tube is rotated, and the protruding point enters A cross-section in an L-shaped groove.
21. A needle-type vacuum blood collection device with needle tip protection according to claim 15, wherein The blood sample collection tube is threaded into the cylindrical cavity and the adapted configuration is a threaded connection configuration.
22. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein The blood sample collection tube plug is composed of a sealing rubber plug and a protective cover, the sealing rubber plug is plugged in the collecting tube lumen, and the protective cover is plugged on the collecting tube nozzle and the sealing rubber plug.
23. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein The length of the cylindrical cavity is less than the length of the blood sample collection tube, and the tail of the blood sample collection tube nested in the cylindrical cavity is exposed outside the cylindrical cavity.
24. A needle-type vacuum blood collection device with needle tip protection according to claim 1, wherein A contact surface is disposed on the outer peripheral surface of the side of the needle barrel adjacent to the vascular puncture needle tube, and the bottom surface of the contact table has a concave shape or a concave curved shape which is adapted to the elbow of the human body.

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