WO2014063347A1 - Automatic needle withdrawing integral vacuum blood sampling apparatus with needle tip protective sleeve - Google Patents

Abstract

An automatic needle withdrawing integral vacuum blood sampling apparatus with a needle tip protective sleeve, which comprises a puncture needle seat (4), a puncture needle tube (11), a flexible connecting tube (13), a blood sampling needle tube (12), a blood sample collection tube (2), a blood sampling needle seat (3), the needle tip protective sleeve (5) and an automatic needle withdrawing apparatus (6). A tube core of the vascular puncture needle tube (11), a core hole of the puncture needle seat (4), the tube core of the flexible connecting tube (13), the tube core of the blood sampling needle tube (12) and a tube cavity of the blood sample collection tube (2) with a pierced sealing layer (21) form a blood channel. The puncture needle tube (11), puncture needle seat (4), needle tip protective sleeve (5) and automatic needle withdrawing apparatus (6) form a puncture needle component. The puncture needle seat (4) and the puncture needle tube (11) inserted thereon are installed in an inner cavity of the needle tip protective sleeve (5). The flexible connecting tube (13) that enters from a rear-end head of the protective sleeve is connected to a tail end of the puncture needle seat (4). The automatic needle withdrawing apparatus (6) comprises a compression spring (61) and a brake mechanism (62). The puncture needle seat (4) and puncture needle tube (11) form a sliding component that can slide backward relative to the protective sleeve (5). After the brake mechanism (62) is released, the sliding component loses braking and slides backward as been driven by a pre-tightening force of the compression spring (61). With the retreat of the sliding component, the puncture needle tube (11) retracts to the inner cavity of the protective sleeve (5) until it completely enters the protective sleeve (5).

Description

 Automatic needle withdrawal integral vacuum blood collection device with needle tip protective sleeve  Summary of the invention

 Technical field

 The invention relates to clinical medical treatment A human external vacuum blood collection device, in particular to an automatic vacuum removal whole blood collection device with a needle tip protection sleeve.

 Background technique

 A vacuum blood collection device in the prior art is shown in FIG. 1 and FIG. 2, and includes a blood collection needle 1 and a blood sample collection tube 2, and a blood collection needle 1 One end is a vascular puncture needle 11 and the other end is provided with a rubber sleeve blood collection needle 12, which is connected by a PVC catheter 13 in the middle. 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, the blood collection needle tube is wrapped, the blood in the catheter is prevented 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 body puncture needle 11 must be pulled out first, and then the collection tube is removed. 2 Blood collection tube 12 . It can be seen that the vacuum blood collection device has a separate structure of the blood collection needle 1 and the collection tube 2, and the blood collection process needs to take care of the catheter at the same time. The two needles lead to complicated and cumbersome operation, multiple operation steps even require hands and a certain and just enough force to complete the extraction and insertion of the needle tube, and at this time, it is impossible to care for the needle tube at the other end, and thus It 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. The exposed puncture needle 11 is easy to pollute the environment, and it is easy to accidentally injure medical personnel to cause serious blood pollution. The manual withdrawal process will inevitably lead to inconvenient operation.

 Invention composition

The object of the present invention is to overcome the deficiencies in the prior art, and to provide an automatic retraction with a needle tip protective sleeve which is simplified in structure, simple in operation, easy to remove, and which does not pollute the environment after the human body is pulled out, and does not accidentally injure the medical staff. Integral vacuum blood collection device.

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

Automatic vacuum-removing integrated vacuum blood collection device with needle tip protective sleeve, including puncture needle seat, puncture needle tube, soft connecting tube, blood collecting needle tube and blood sample collecting tube, the main point of which is that there is also a blood collecting needle seat and a needle tip a protective sleeve and an automatic needle removing device, the blood collecting needle seat has a cylindrical cavity, the tubular cavity tail end is open, the blood collecting needle tube is fixed on the front end wall thereof and extends backward into the cylindrical cavity, the blood sample collecting tube The tube plug is inserted in the cylindrical cavity in a pluggable manner, the length of the cylindrical cavity is smaller than the length of the blood sample collection tube, and the tail of the blood sample collection tube is inserted in the cylindrical cavity Exposed to the outside of the cylindrical cavity, there is a gap between the front end surface of the blood sample collection tube and the front end wall of the cylindrical cavity A. The back wall of the blood sample collection tube plug has a sealing layer pierceable by the rear end of the blood collection tube, and the thickness of the sealing layer is smaller than the gap A. The thickness of the cylindrical cavity has a connection structure 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 through the structure. And removing the cylindrical cavity, the vascular puncture needle wick, the soft connecting tube wick, the lancet tube wick, and the blood sample collection tube lumen after being pierced by the sealing layer constitute a blood channel, and the needle tip protective sleeve is The utility model relates to a hollow stick sleeve, the front end portion of which has a cavity matched with the puncture needle tube, the puncture needle tube is sleeved in the inner cavity and is inserted on the puncture needle seat, and the puncture needle seat is also installed in the inner cavity of the needle tip protection sleeve The soft connecting tube extending from the rear end of the protective sleeve is connected with the tail end of the puncture needle seat, and the automatic needle removing device comprises a compression spring and a braking member, and the compression spring is contained in the inner cavity of the protective sleeve and is compressed and protected. Between the front end wall of the inner cavity and the puncture needle seat, a brake groove is arranged on the puncture needle seat A, a brake groove B is inserted through the side wall of the protective sleeve corresponding to the braking groove, and the braking member is mounted on the outer side wall of the protective sleeve, and the braking end thereof passes through the braking groove B to abut against the brake Slot A In this way, the puncture needle holder is braked, and the puncture needle seat and the puncture needle tube form a sliding member which can slide back relative to the protective sleeve. After the brake member is released, the sliding member loses the brake and is driven backward by the compression spring preloading force. Sliding, as the retracting puncture needle of the sliding member retracts into the inner cavity of the protective sleeve until it is completely immersed in the protective sleeve.

In this way, the blood collection needle holder is added and the blood sample collection tube is connected to the blood collection needle holder and the blood collection needle tube in advance, so that the entire blood collection device is integrated. The above-mentioned matching structure of the cylindrical cavity and the plug not only facilitates the loading and unloading of the blood sample collecting tube, but also forms a tight connection relationship with the blood sample collecting tube plug, so that it is convenient to be inserted in the cylindrical space. The blood sample collection tube in the cavity is not easily detached 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.

In actual use, first puncture the needle into the blood vessels of the human body, wait for the blood to fill the soft extension tube, gently press the needle to fix the puncture needle with one hand, and the other four fingers pinch the blood collection needle seat, because the sealing layer of the tube plug is relatively thin, another Gently push the blood sample collection tube from the bottom or gently press the blood collection needle from the bottom, let the needle of the blood collection needle pass through the sealant and enter the collection tube until the collection tube touches the front wall of the cylindrical cavity and cannot go forward. Because of the negative pressure in the collection tube, the blood quickly flows into the blood collection tube to the required sample volume. If multiple blood samples need to be collected, the blood collection needle holder can be pinched, the blood sample collection tube can be easily withdrawn, and the new collection tube can be inserted. Blood collection. After the blood collection is completed, the puncture needle of the human body is first withdrawn, and the brake member can be released at this time. Under the driving force of the compression spring, the puncture needle is retracted into the inner cavity of the protective sleeve, and then the blood collection tube is withdrawn, due to blood collection. The needle seat is longer than the blood collection needle tube, so it can ensure that the needle tip of the blood collection needle will not hurt the person, and in the process of repeatedly changing the blood collection tube, the blood collection needle seat also plays the role of insertion and guiding, and the blood collection needle tip does not stab the person, so Safety protection, at the same time, the blood collection sealing sleeve is rebounded and sealed, and the blood collection needle head is sealed to avoid blood pollution.

It can be seen that the two bodies in the prior art are separated and integrated, the structure is simplified, and the operation is simple and easy. Since the blood collection needle holder can be used to pass the needle of the blood collection needle through the sealant, the operation is simpler and easier; The intervention of the needle tip protects the puncture needle directly from the human body into the protective sleeve, ensuring that the puncture needle tube will not pollute the environment or accidentally injure the medical staff or other personnel; the intervention of the automatic needle withdrawal device makes the operation simpler and more convenient.

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

 Further optimization of the automatic needle removal device:

The brake member is a lever, and the brake end and the operating end are respectively located at two ends of the lever fulcrum, and the corresponding portion of the outer side wall of the protective sleeve is provided with a twisting support on which the lever fulcrum is supported.

 Thus, when the operating end is pressed down, the lever is released and lifted, the brake member is released, and the compression spring is released.

 Also included is a torsion spring mounted on the hinge mount, the direction of the torsion spring preload being opposite to the direction in which the lever is released.

In order not to make the sliding part not fall too fast and rough, the pre-tightening force of the compression spring should be reduced as much as possible. However, the too low pre-tightening force will cause the locking force of the braking member to be insufficient, so the torsion spring is added to improve the braking member. The locking force also increases the damping of the release lift and makes the operation feel better.

 The operating end of the brake member is provided with an arcuate small platform corresponding to the shape of the finger surface.

 This increases the feel and comfort of operation.

 Further optimizations regarding the protective sleeve and the puncture needle holder are:

The inner cavity of the protective sleeve is composed of a front core hole and a rear core hole. The front core hole and the rear core hole are penetrated but the two are eccentrically distributed. The puncture needle tube and the front core hole are matched and sleeved, and then inserted into the rear core hole and inserted. The needle hole is placed in the core hole of the puncture needle seat, and the puncture needle seat is matched with the core hole of the rear segment, and the soft connection tube core communicates with the core of the puncture needle tube through the core hole of the puncture needle holder.

The sliding joint of the puncture needle seat and the rear core hole can increase the stability of the puncture needle seat sliding in the inner cavity of the protective sleeve, and at the same time generate suitable sliding damping.

The puncture needle seat is composed of a front segment, a middle segment and a rear segment, wherein the front segment and the rear segment are coaxially distributed, but are eccentrically distributed with respect to the posterior segment, and the core hole continuously extends along the anterior, middle segment and posterior segment lumens and penetrates the anterior and posterior segments, puncture The needle tube and the soft connecting tube are respectively inserted in the front and rear sections, and the middle section is matched with the core hole of the rear part of the protective sleeve, and the braking groove The inner peripheral wall of the middle section corresponding to B forms a braking groove A.

 Further optimizations regarding cylindrical cavities and plugs are:

 When the cylindrical cavity and the plug are in an adapted connection state, the rear end of the blood collection needle is just in front of the sealing layer to be pierced.

 This makes it easy to grasp the degree of pre-insertion of the blood collection needle on the inserted touch.

 The adapted connection configuration has a variety of options, such as the size of the inner diameter of the barrel and the transition fit. The following is an optimized choice:

 The configuration in the cylindrical cavity that fits the plug is a plurality of configurations that are circumferentially distributed or symmetrically distributed along the inner wall of the cylindrical cavity.

 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.

 The blood sample collection tube can also be connected to the cylindrical cavity in this way:

 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 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 sleeve 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 sealant 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 blood collection needle holder is disposed at a position corresponding to the inner portion of the blood sample collection tube in the cylindrical cavity, and a long groove is arranged along the axial direction of the blood collection needle seat as an operation window. The operation window has two, relative distribution On both sides of the cylindrical cavity.

In this way, the blood can be observed through the operation window, the state of the blood volume in the blood sample collection tube can be observed, the insertion state and the insertion degree of the blood sample collection tube can also be observed, and the blood sample collection tube can be first passed through the operation window. The pinch plug is forced back out of the blood sample collection tube to prevent detachment of the collection tube body from the tube plug when exiting the blood sample collection tube.

In summary, the present invention has the following advantages over the prior art: the present invention changes the two bodies in the prior art to be separate and integrated, the structure is simplified, and the operation is simple and easy, because the blood collection needle can be used to make the blood collection needle tip Passing through the sealant makes the operation easier and easier; and the insertion of the tip guard allows the puncture needle to be directly retracted from the human body into the protective sleeve, ensuring that the puncture needle does not contaminate the environment or accidentally injure the medical staff or other personnel. The intervention of the automatic needle removal device makes the operation easier and more convenient.

 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 schematic front elevational view showing the automatic needle removing integral vacuum blood collecting device with a needle tip protective cover according to the present invention.

 4 is a schematic left side view showing the structure of the automatic needle removing integral vacuum blood collecting device with a needle tip protective cover according to the present invention.

 Fig. 5 is a schematic view showing the state of insertion of a blood collection needle tube of the automatic needle-removing integral vacuum blood collection device with a needle tip protection sleeve according to the present invention;

 6 is a schematic view showing the state of withdrawal of the blood collection needle of the automatic needle-removing integrated vacuum blood collection device with the needle tip protection sleeve according to the present invention.

 Fig. 7 is a schematic front view showing the structure of a blood collection needle holder in the first embodiment of the present invention.

 Fig. 8 is a schematic plan view showing the structure of a blood collection needle holder in the first embodiment of the present invention.

 Figure 9 is a schematic view showing the structure of a blood sample collection tube in the first embodiment of the present invention.

 Figure 10 is a schematic view showing the structure of the puncture needle assembly in the puncture state in the embodiment of the present invention.

 Figure 11 is a schematic view showing the structure of the puncture needle assembly in the withdrawn state in the embodiment of the present invention.

 Figure 12 is a schematic view showing the structure of the rear section of the protective cover in the embodiment of the present invention.

 Figure 13 is a schematic perspective view showing the structure of the rear section of the protective cover in the embodiment of the present invention.

 Figure 14 is a schematic view showing the structure of a puncture needle holder in an embodiment of the present invention.

 Figure 15 is a schematic perspective view showing the structure of a puncture needle holder in the embodiment of the present invention.

 Figure 16 is a schematic view showing the structure of a brake member in an embodiment of the present invention.

 Figure 17 is a schematic perspective view showing the structure of a brake member in an embodiment of the present invention.

 Figure 18 is a schematic perspective view showing the structure of a blood sample collection tube protective cover in a preferred embodiment of the present invention.

 Label description:

 11 puncture needle 12 blood collection needle 13 soft connection tube 14 blood collection gland 2 blood sample collection tube 21 sealing layer 22 Protective cover 23 Sealant plug 24 Core hole 24L Groove vertical section 26L Groove cross section 3 Blood collection needle holder 31 Cylindrical cavity 32 Operating window 33 Short arc convex card point 4 Puncture needle holder

 41 Brake Slot A 5 Tip Protector 51 Brake Slot B 52 Gripper Support 6 Automatic Needle Removal Device 61 Brake Member 62 Compression spring 611 brake end

 612 operator

 The invention will now be described in greater detail with reference to the drawings.

 Embodiment 1:

 Referring to Fig. 3 and Fig. 4, an automatic vacuum withdrawing device with a needle tip protective sleeve, including a puncture needle holder 4 and a puncture needle tube 11 , soft connecting tube 13 , blood collecting needle 12 , blood sample collecting tube 2 , blood collecting needle holder 3 , needle tip protective sleeve 5 and an automatic needle removing device 6 . Blood collection needle holder 3 has a cylindrical cavity 31 The end of the cylindrical cavity is open, and the blood collection needle 12 is fixed on the front end wall thereof and extends rearward into the cylindrical cavity 31. The blood sample collection tube 2 is inserted in the front and inserted in the pluggable manner. Cylindrical cavity 31 The length of the cylindrical cavity 31 is smaller than the length of the blood sample collection tube 2, and the tail of the blood sample collection tube 2 inserted in the cylindrical cavity is exposed outside the cylindrical cavity 31, and the blood sample collection tube 2 There is a gap A between the front end surface and the front end wall of the cylindrical cavity 31, and the blood sample collection tube 2 has a sealing layer 21 which can be pierced by the rear end of the blood collection needle tube 12, and the sealing layer 21 The thickness is smaller than the thickness of the gap A, and the cylindrical cavity 31 has a structure adapted to the blood sample collection tube 2, the blood vessel needle 11 core, the needle hub 4 core hole, and the soft connecting tube 13 The wick, the blood collection tube 12, and the blood sample collection tube 2 after being pierced by the sealing layer 2 form a blood passage.

 Referring to Fig. 9, the blood sample collection tube 2 tube plug is composed of a sealing rubber plug 23 and a protective cover 22, and the sealing rubber plug 23 The sleeve is plugged into the collection tube lumen, and the protective cover 22 is capped on the collection tube nozzle and the sealing plug 23. The front end surface of the blood sample collection tube 2 is the front end surface of the protective cover. The aforementioned blood sample collection tube 2 The sealing layer 21 of the rear end wall of the pipe plug is located on the sealant plug. The seal layer thickness is 1.0MM.

 Referring to Figure 7 and Figure 8, the cylindrical cavity 31 The inner fit to the plug is a configuration of two resilient snaps that are circumferentially symmetrically distributed along the inner wall of the cylindrical cavity. The elastic snap construction is a short arc convex click point 33, which is a short arc convex click point 33 Made of elastic material. When the protective cover 22 of the blood sample collection tube 2 is in contact with the short arc convex click point 33, the rear end of the blood collection needle 12 is just in front of the sealing layer 21 to be pierced.

 Referring to Figures 7 and 8, the blood collection needle holder 3 is contained in the tubular cavity with the blood sample collection tube 2 in the tube plug 31 A long slot is provided along the axial direction of the blood collection needle holder 3 as an operation window 32. The operation window 32 has two opposite sides and is relatively distributed on both sides of the cylindrical cavity 31. This operation window 32 It is offset from the short arc convex card point 33 by 90 degrees.

 Referring to Fig. 5 and Fig. 6, the blood collection needle tube 12 is covered with a blood collection sealing sleeve 14 The blood sample collection tube plug center is provided with a core hole 24 extending axially to the sealing layer 21, and the inner diameter of the core hole 24 is slightly larger than the outer diameter of the blood collection sealing sleeve 14. In this way, the blood collection needle 12 is brought with the blood collection sealing sleeve 14 When the plug hole is inserted through the core hole 24, the blood collection sealing sleeve 14 is subjected to axial compression and compression, and is radially twisted and expanded, just like the core hole 24 The inner hole wall is pressed and rubbed, and the blood collection needle tube is not allowed to come out of the sealing rubber plug.

 Refer to Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15, Figure 16, Figure 17 The puncture needle assembly is composed of a puncture needle tube 11, a puncture needle holder 4, a needle tip protection sleeve 5, and an automatic needle withdrawal device 6. Needle protector 5 is a hollow stick sleeve, protective sleeve 5 The front and rear sections are fixedly connected, and the inner cavity of the protective sleeve 5 is composed of a front core hole and a rear core hole, and the front core hole and the rear core hole are penetrated but the two are eccentrically distributed, and the puncture needle 11 After being matched with the front core hole, it is inserted into the rear core hole and inserted into the core hole of the puncture needle holder 4. The puncture needle holder 4 is also mounted in the inner cavity of the needle tip protective sleeve 5, and the soft connecting tube extending from the rear end of the protective sleeve 5 13 Connect to the end of the needle hub 4. Puncture needle holder 4 It consists of the anterior segment, the middle segment and the posterior segment. The anterior segment and the posterior segment are coaxially distributed, but are eccentrically distributed with respect to the posterior segment. The core hole extends continuously along the anterior, middle and posterior segments and penetrates the anterior and posterior segments, puncture needle and soft. The connecting pipes are respectively inserted on the front and rear sections, the middle section and the protective sleeve 5 The rear core hole is matched and sleeved, and the outer peripheral wall of the middle section corresponding to the brake groove B51 is concavely formed to form the braking groove A41. The automatic needle removing device includes a compression spring 61, a brake member 62, and a torsion spring, and the compression spring 62 Included in the inner cavity of the protective sleeve 5 and compressed between the front end wall of the protective sleeve and the puncture needle holder 4, a brake groove B is inserted through the side wall of the protective sleeve 5 corresponding to the braking groove A, and the brake is applied. Member 62 Mounted on the outer side wall of the protective cover 5, the braking member 62 is a lever, and the braking end 611 and the operating end 612 are respectively located at both ends of the lever fulcrum, and the operating end 612 A curved small platform corresponding to the shape of the finger face is provided. The corresponding portion of the outer side wall of the protective sleeve 5 is provided with a twisting support 52 on which the lever fulcrum is hinged, and a torsion spring (not shown) is mounted on the hinge support On the 52, the direction of the torsion spring preload is opposite to the direction in which the lever is released. The brake head 611 passes through the brake groove B51 and protrudes into the brake groove A41 to brake the puncture needle holder 4, and the puncture needle holder 4 And the puncture needle 11 constitutes a sliding member that can slide back relative to the protective sleeve 5, releasing the braking member 62 and then the sliding member loses braking and is in the compression spring 61 The pre-tightening force is driven to slide backward, and the retracting puncture needle 11 of the sliding member is retracted into the inner cavity of the protective cover 5 until it is completely immersed in the protective cover 5.

 In actual use, the puncture needle 11 is first inserted into the blood vessel of the human body, and the blood is filled with the soft extension tube, and the small finger is gently pressed to fix the puncture needle 11 The remaining four fingers pinch the blood collection needle holder 3. Since the tube sealing layer 21 is relatively thin, the other hand gently pushes the blood sample collection tube 2 from the bottom to allow the blood collection needle 12 tip to pass through the sealing layer 21 Entering the collection tube until the collection tube touches the front end wall of the cylindrical cavity 31 and cannot move forward; the blood quickly flows into the blood collection tube due to the negative pressure inside the collection tube 2 After collecting the required sample, if you need to collect multiple blood samples, you can pinch the blood collection needle holder 3 and pinch the blood sample collection tube through the operation window 32. Easily exit and insert a new collection tube to collect blood. After the blood collection is finished, the human end puncture needle 11 is withdrawn first, and then the operation end 612 is pressed. The lever is released and lifted, the brake member is released, the compression spring is released, and the retracting needle 11 of the sliding member is retracted into the inner cavity of the protective sleeve 5 until completely immersed in the protective sleeve 5; and then exits the blood collecting tube 2 Since the blood collection needle holder 3 is longer than the blood collection needle tube 12, it can ensure that the 12 needle tip of the blood collection needle tube does not injure the person, and the blood collection needle holder 3 during the repeated replacement of the blood collection tube 3 It also plays a role of insertion and guiding. The tip of the blood collection needle does not puncture the person, so it plays a safety protection role. At the same time, the blood collection sealing sleeve 14 is rebounded and sealed, and 12 blood collection needle tubes are sealed to avoid blood pollution.

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

 Best embodiment:

 Refer to Figure 18 The configuration in the cylindrical cavity that fits the pipe plug is a plurality of elastic snap contacts distributed circumferentially or symmetrically along the inner wall of the cylindrical cavity, the elastic snap contact structure being a short arc convex The card point, the short arc convex card point and the blood sample collection tube plug are made of an elastic material. Another suitable configuration is made in the plug protection cover 22 an L-shaped groove on the outer peripheral surface and a projecting point formed on the inner wall of the cylindrical cavity, the protruding point entering from the end of the vertical section 25 of the L-shaped groove at the front end face of the pipe plug The slot can slide therein, and when the inner wall of the cylindrical cavity is elastically engaged with the plug protection cover, the protruding point has entered the vertical section 25 in the L-shaped slot but has not yet reached the bottom of the vertical section 25. End, at this time, the blood collection tube 12 Immediately before the sealing layer 21 to be pierced, the front blood sample collection tube 2 to the blood collection needle 12 pierce the sealing layer 21, the protruding point just reaches the vertical section 25 At the bottom end, the blood sample collection tube 2 is rotated at this time, and the projecting point enters the cross-fold section 26 in the L-shaped groove. Thus, the cooperation of the cross-section 26 in the L-shaped groove with the protruding point can lock the blood sample collection tube 2 The degree of freedom in the axial direction makes it impossible to push forward or backward relative to the blood collection needle holder 3.

 The parts not described in this embodiment are the same as those in the first embodiment.

Claims (14)

An automatic needle-removing integrated vacuum blood collection device with a needle tip protective sleeve, comprising a puncture needle holder, a puncture needle tube, a soft connection tube, a blood collection needle tube and a blood sample collection tube, characterized in that it further comprises a blood collection needle holder and a needle tip protection a sleeve and an automatic needle withdrawal device, the blood collection needle holder has a cylindrical cavity, the tubular cavity end is open, the blood collection needle tube is fixed on the front end wall thereof and extends backward into the cylindrical cavity, the blood sample collection tube Inserted in the cylindrical cavity in a pluggable manner, the length of the cylindrical cavity is smaller than the length of the blood sample collection tube, and the tail of the blood sample collection tube inserted in the cylindrical cavity is exposed Outside the cylindrical cavity, there is a gap between the front end face of the blood sample collection tube and the front end wall of the cylindrical cavity A. The back wall of the blood sample collection tube plug has a sealing layer pierceable by the rear end of the blood collection tube, and the thickness of the sealing layer is smaller than the gap A. The thickness of the cylindrical cavity has a connection structure 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 through the structure. And removing the cylindrical cavity, the vascular puncture needle wick, the soft connecting tube wick, the lancet tube wick, and the blood sample collection tube lumen after being pierced by the sealing layer constitute a blood channel, and the needle tip protective sleeve is The utility model relates to a hollow stick sleeve, the front end portion of which has a cavity matched with the puncture needle tube, the puncture needle tube is sleeved in the inner cavity and is inserted on the puncture needle seat, and the puncture needle seat is also installed in the inner cavity of the needle tip protection sleeve The soft connecting tube extending from the rear end of the protective sleeve is connected with the tail end of the puncture needle seat, and the automatic needle removing device comprises a compression spring and a braking member, and the compression spring is contained in the inner cavity of the protective sleeve and is compressed and protected. Between the front end wall of the inner cavity and the puncture needle seat, a brake groove is arranged on the puncture needle seat A, a brake groove B is inserted through the side wall of the protective sleeve corresponding to the braking groove, and the braking member is mounted on the outer side wall of the protective sleeve, and the braking end thereof passes through the braking groove B to abut against the brake Slot A In this way, the puncture needle holder is braked, and the puncture needle seat and the puncture needle tube form a sliding member which can slide back relative to the protective sleeve. After the brake member is released, the sliding member loses the brake and is driven backward by the compression spring preloading force. Sliding, as the retracting puncture needle of the sliding member retracts into the inner cavity of the protective sleeve until it is completely immersed in the protective sleeve. According to claim 1 The automatic needle removing integral vacuum blood collecting device with a needle tip protective sleeve is characterized in that the braking member is a lever, and the braking end and the operating end are respectively located at two ends of the lever fulcrum, and the corresponding outer wall of the protective sleeve corresponds The portion is provided with a gimbal seat on which the lever fulcrum is hinged. According to claim 1 The automatic needle removing integral vacuum blood collecting device with a needle tip protective sleeve is characterized in that the braking member is a lever, and the braking end and the operating end are respectively located at two ends of the lever fulcrum, and the corresponding outer wall of the protective sleeve corresponds The portion is provided with a gimbal seat, and the lever fulcrum is supported on the gimbal seat, and further comprises a torsion spring mounted on the hinge seat, and the direction of the torsion spring preload is opposite to the direction in which the lever is released and lifted. According to claim 1 The automatic needle removing integral vacuum blood collecting device with a needle tip protective sleeve is characterized in that: the inner cavity of the protective sleeve is composed of a front core hole and a rear core hole, and the front core hole and the rear core hole are penetrated but the two are eccentrically distributed. The puncture needle tube is matched with the front core hole and then inserted into the back core hole and inserted into the core hole of the puncture needle seat. The puncture needle seat and the rear core hole are matched and sleeved, and the soft connection tube core is puncture The core hole of the needle hub is in communication with the wick of the puncture needle. According to claim 1 The automatic needle removing integral vacuum blood collecting device with a needle tip protective sleeve is characterized in that the puncture needle seat is composed of a front segment, a middle segment and a rear segment, wherein the front segment and the rear segment are coaxially distributed, but the eccentric distribution is relative to the posterior segment. The hole extends continuously in the inner cavity of the front section, the middle section and the rear section and penetrates the front and rear sections. The puncture needle tube and the soft connection tube are respectively inserted in the front and rear sections, and the middle section is matched with the core hole of the back section of the protective sleeve, and the hole is matched and matched. Moving slot The inner peripheral wall of the middle section corresponding to B forms a braking groove A. According to claim 1 The automatic needle-removing integral vacuum blood collection device with a needle tip protection sleeve is characterized in that when the cylindrical cavity and the pipe plug are in an adapted connection state, the rear end of the blood collection needle tube is just in the sealing layer to be pierced before. According to claim 1 The automatic needle-removing integrated vacuum blood collection device with a needle tip protection sleeve is characterized in that the configuration of the cylindrical cavity corresponding to the pipe plug is a plurality of circumferential distribution along the inner wall of the cylindrical cavity or The construction of a symmetrically distributed elastic snap. According to claim 7 The automatic needle removing integral vacuum blood collecting device with a needle tip protective sleeve is characterized in that the elastic chucking structure can be a short arc convex card point, or the short arc convex card point or the blood sample collecting tube tube plug Made of elastic material. According to claim 7 The automatic needle-removing integral vacuum blood collection device with a needle tip protection sleeve is characterized in that the structure corresponding to the pipe plug in the cylindrical cavity is a kind of L made on the outer peripheral surface of the pipe 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. According to claim 7 The automatic needle removal integral vacuum blood collection device with a needle tip protective sleeve is characterized in that the matching configuration is a threaded connection configuration, and the blood sample collection tube is screwed into the cylindrical cavity. According to claim 1 The automatic needle removing integral vacuum blood collecting device with a needle tip protective sleeve is characterized in that the blood sample collecting tube plug is composed of a sealing rubber plug and a protective cover, and the sealing rubber plug is plugged in the collecting tube lumen, and the protective cover The cap is placed on the collecting tube nozzle and the sealing plug, and the configuration corresponding to the cylindrical cavity is disposed on the protective cover. According to claim 1 The automatic needle withdrawal integral vacuum blood collection device with a needle tip protection sleeve is characterized in that 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 sleeve. According to claim 1 or 12 The automatic needle removing integral vacuum blood collecting device with a needle tip protective sleeve is characterized in that the thickness of the sealing layer of the blood sample collecting tube plug is 1.5-0.5 MM. According to claim 1 The automatic needle withdrawal integral vacuum blood collection device with a needle tip protection sleeve is characterized in that the blood collection needle holder is located along the blood collection needle holder at a position corresponding to the inside of the cylindrical cavity in the blood sample collection tube plug. The axial direction is provided with a long groove as an operation window, and the operation window has two, which are relatively distributed on both sides of the cylindrical cavity.

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