CN100446725C - Blood taking needle module - Google Patents

Abstract

The invention relates to a blood taking needle module which comprises a sleeve, a needle tube and a sealing piece, wherein the inner wall of the front section of the sleeve is converged forwards to form an inclined plane, and a needle outlet is formed at the front end part of the sleeve; the sleeve is sleeved with the needle tube, and a braking hole is formed in the side wall of the sleeve; a braking piece which is propped against the braking hole and an elastic sheet which is propped against the inner wall of the inclined surface of the front section of the sleeve are formed on the side surface of the needle tube; the needle head of the blood taking needle fixedly arranged in the needle tube extends out of the opening of the needle tube; the sealing part covers the needle head besides sealing the needle tube orifice, and extends out of the needle outlet of the sleeve from the needle tube orifice; the structure of the braking hole and the braking piece on the side wall of the sleeve is convenient to assemble, and the action of pushing the needle tube can be really, effectively and smoothly used.

Description

Blood collection needle module

technical field

The invention relates to a blood collection needle module, in particular to a blood collection needle module which is braked by using a brake hole on the wall of a sleeve and a needle tube brake pad.

Background technique

In many cases, medical personnel will need to puncture a small wound on the patient or person under examination in order to obtain a small blood sample. The ribbed needles, triangular needles or bloodletting sheets used in the past are inconvenient in disinfection, operation and disposal after use.

Therefore, as shown in FIGS. 7 and 8 , a traditional disposable blood collection needle module uses a blood collection gun 50 including a striker 51 to collect blood samples. The blood collection needle module includes a sleeve 60, a needle tube 70, a blood collection needle 30 and a seal 40; The needle tube 70 is installed inside the sleeve 60; the sleeve 60 is a cylindrical body with a rear mouth 61 formed at its rear end, and a flange 611 is formed on the inner edge of the rear mouth 61; the inner wall of the front section of the sleeve 60 converges forward An inclined surface 62 is formed, and a needle outlet 63 is formed at the front end; the needle tube 70 is a hollow tube that passes through the inside of the sleeve 60, a nozzle 71 is formed at the front end, and an impact plate 72 is combined at the rear end, The outer diameter of the impact plate 72 matches the inner diameter of the rear barrel mouth 61, but is limited inside the sleeve 60 by the flange 611; the side of the needle tube 70 forms at least one shrapnel 74 that resists the front slope 62 of the sleeve 60; the blood collection needle 30 It is fixed inside the needle tube 70, and its needle head 31 extends out of the nozzle 71 of the needle tube 70; the sealing member 40 seals the nozzle 71 of the needle tube 70 and covers the needle head 31, and extends out Out of the needle outlet 63 of the sleeve 60.

The blood collection needle module is installed at the tip of the blood collection gun 50. After the user removes the sealing member 40 to expose the needle 31 of the blood collection needle 30, align the sleeve 60 of the blood collection needle module with the needle outlet 63 to be formed. At the site of the wound, hit the impact plate 72 with the striker 51 of the blood collection gun 50, so that the needle tube 70 of the blood collection needle module slides forward, so that the exposed needle 31 pops out of the needle outlet 63 toward the front end, and the blood collection needle is pierced. Wound; at this time, the needle tube 70 drives the shrapnel 74 formed on its side to rush forward at the same time, so that the shrapnel 74 is pressed by the inclined surface 62, exerts a force to restore the original shape, and pulls back the needle tube 70, so that the needle head 31 is reset through the needle outlet 63 Back inside the sleeve 60.

As mentioned above, the chance of the needle head 31 of the blood collection needle 30 being exposed is only at the moment when the blood collection wound is pierced; The needle tube 70 is pulled back by the shrapnel 74 and remains inside the sleeve 60 of the blood collection needle module. For the medical staff who use the blood collection gun 50, the needle 31 is only exposed when the blood collection wound is formed, and there is no need to touch the needle 31 of the blood collection needle 30 when installing or removing the blood collection needle module before and after use, which greatly improves the safety. Improvement; for patients who receive blood collection or people who undergo testing, the needle 31 puncture time is greatly shortened compared with traditional manual methods, and the pain is also relatively relieved.

However, the traditional disposable lancet module still has shortcomings to be improved.

The sleeve 60 of the traditional disposable blood collection needle module has a flange 611 formed on the inner edge of the rear mouth 61 to limit the design of the needle tube 70. During use, a part of the striker 51 may hit the flange due to a slight deviation in the direction of travel. 611. A part hits the impact plate 72 at the rear end of the needle tube 70, so that the penetration depth of the needle 31 is not enough to achieve the purpose of blood collection, but it needs to be discarded based on the principle that the needle cannot be reused, and then another blood collection needle module is used. The waste also makes the blood-collected suffer unnecessary pain.

From a manufacturing point of view, when the sleeve 60 is integrally formed into a cylinder, when the needle tube 70 is combined with the sleeve 60, an external force must be applied to force the impact plate 72 at the rear end of the needle tube 70 to deform. The needle tube 70 is inserted through the rear barrel opening 61 at the rear end of the sleeve 60 and left inside the sleeve 60 , and recovers its shape after passing through so that the flange 611 can function as a stop. The impact plate 72 may be damaged due to the aforementioned deformation process, thereby affecting the yield of the traditional lancet module manufacturing and assembling. Therefore, it is known that the traditional lancet module has shortcomings to be improved in use and manufacture.

Contents of the invention

In view of the shortcomings of the traditional blood collection needle module that need to be improved in use and manufacture, the purpose of the present invention is to provide a blood collection needle module that is easy to assemble and can be ejected smoothly.

In order to achieve the aforementioned purpose, the blood collection needle module of the present invention includes a sleeve, a needle tube, a blood collection needle and a seal; the blood collection needle is arranged in the needle tube, the seal is sealed at the front end of the needle tube, and the needle tube It is located inside the sleeve; wherein the sleeve is a cylinder, the rear end of which forms a rear mouth, and the inner wall of the front section converges forward to form at least one slope, and a needle outlet is formed at the front end of the sleeve; the side of the sleeve The wall is formed with at least one brake hole; the needle tube is a hollow tube, which is installed inside the sleeve; the front end of the needle tube forms a nozzle, and its rear end is combined with an impact plate matching the inner diameter of the rear barrel mouth; the needle tube The side is formed with at least one brake plate that is locked against the brake hole on the side wall of the sleeve, and at least one elastic piece that is locked against the slope of the front section of the sleeve; the blood collection needle is fixed inside the needle tube, and its needle protrudes from the needle tube mouth ; The seal covers the needle, and extends from the needle tube mouth outside the needle outlet of the sleeve.

Preferably, at least one guide protrusion is formed on the side of the needle tube, at least one guide protrusion is formed on the side of the impact plate of the needle tube, and at least one axial guide groove is formed on the inner wall of the sleeve from the rear end to the front end; the guide protrusion The block and the guide protrusion correspond to the guide groove, so that the needle tube is guided by the guide groove when passing through the sleeve, so that the needle tube does not rotate around the axial direction when moving in the sleeve, and stabilizes the needle tube in the sleeve Actions.

When using the blood collection needle module of the present invention, install it on a blood collection gun including a striker, first remove the sealing part, expose the needle of the blood collection needle to the needle tube, and then align the blood collection needle module with the position where blood is to be collected. Hit the impact plate with the firing pin of the lancing gun. At this time, the needle tube slides forward under the impact force, and at the same time drives the exposed needle to eject the needle outlet of the sleeve due to the removal of the seal, and punctures a blood collection wound at the position where blood collection is desired.

In addition to driving the needle, the needle tube also drives the shrapnel formed on its side to advance, so that the shrapnel is deformed by the pressure of the front slope of the sleeve, accumulating elastic potential energy, and then recovers its original shape when it is released from the elastic potential energy. Pull back the needle tube, driving the needle back into the sleeve. When the needle tube is reset back to the inside of the sleeve, the brake plate formed on the side of the needle tube is pressed against the brake hole on the side wall of the sleeve to fix the needle tube in position.

The invention improves the structure of the brake hole and the brake plate, and replaces the traditional way of using the inner edge of the sleeve side wall to limit the position of the traditional blood collection needle module, which can make the assembly convenient, and make the action of pushing the needle tube more accurate and effective in use. smooth. When installing a blood collection needle module on a blood collection gun, a striker needs to be used to hit the needle tube of the blood collection needle module, so that the needle of the blood collection needle in the needle tube is exposed. The striking part of the striker is an impact plate formed behind the needle tube. In the blood collection needle module of the present invention, since the function of limiting the needle tube to the sleeve is achieved by the stopper hole on the side wall of the sleeve and the stopper of the needle tube, there is no need to form a flange on the rear inner wall of the sleeve. It can overcome the problem that the striker may bump into the flange due to the deviation of the direction of travel of the striker in the traditional blood collection needle module.

The improvement in the aforementioned structure makes the blood collection needle module of the present invention installed in a blood collection gun and ready to be hit by the firing pin of the blood collection gun. Structures such as edges cause possible barriers in between. Then the action of pushing the needle tube can be made more accurate, effective and smooth, so that the needle of the blood collection needle will not fail to pierce the blood collection wound effectively due to insufficient penetration depth.

From the above description, we can understand the specific structure and usage method of the present invention, and it is indeed a lancet module that is easy to assemble and can be ejected smoothly.

Description of drawings

Figure 1: Perspective view of the present invention.

Figure 2: Partially exploded view of the invention.

Figure 3: Sectional view of the present invention.

Fig. 4: Schematic sectional view of the action of the present invention.

Fig. 5: Another schematic sectional view of the action of the present invention.

Figure 6: Schematic diagram of the use of the present invention.

Fig. 7: A schematic sectional view of a traditional blood collection needle module.

Fig. 8: A perspective view of a traditional lancet module.

Figure number:

10 sleeve 11 rear mouth

12 bevel 13 needle outlet

14 Guide groove 15 Brake hole

20 needle tubes 21 nozzles

22 Impact plate 23 Brake pads

24 shrapnel 25 guide bump

30 blood collection needles 31 needles

40 seals 50 blood collection guns

51 striker 60 sleeve

61 rear cylinder mouth 611 flange

62 bevel 63 needle outlet

70 needle tube 71 nozzle

72 impact plate 74 shrapnel

Detailed ways

Please refer to FIG. 1 and FIG. 2 , which are a perspective view and a partially exploded view of the present invention, respectively.

The blood collection needle module of the present invention includes a sleeve 10, a needle tube 20, a blood collection needle 30 and a seal 40; , the needle tube 20 is located inside the sleeve 10; wherein the sleeve 10 is a cylinder formed by plastic, a rear mouth 11 is formed at its rear end, and two slopes 12 are formed forward on the inner wall of the front section, and at the front end of the sleeve 10 A long and narrow needle outlet 13 is formed at the top of the sleeve, and two guide grooves 14 are formed on the inner wall of the sleeve 10 from the rear end to the front end; two braking holes 15 are formed on the side wall of the sleeve 10, and the braking hole 15 is an approximately elliptical shape , the direction of its long axis is the same as the axial direction of the sleeve 10; the needle tube 20 is a hollow tube formed of plastic, which is passed through the inside of the sleeve 10; the front end of the needle tube 20 forms a nozzle 21, and its rear end combines There is an impact plate 22 matching the inner diameter of the rear barrel mouth 11, and two guide protrusions 221 corresponding to the guide groove 14 on the inner wall of the sleeve 10 are formed on the side of the impact plate 22; The two stoppers 23 of the moving hole 15, the two elastic pieces 24 that are locked against the front slope 12 of the sleeve 10, and the guide bump 25 corresponding to the guide groove 14 on the inner wall of the sleeve 10; the blood collection needle 30 is fixed inside the needle tube 20 , the needle 31 protrudes from the nozzle 21 of the needle tube 20; the sealing member 40 seals the nozzle 21 of the needle tube 20 and covers the needle 31, and extends from the nozzle 21 of the needle tube 20 to the outlet 13 of the sleeve 10 Outside, the part protruding outside the sleeve 10 is formed into a plate shape.

The above-mentioned two elastic pieces 24 formed on the side of the needle tube 20 are sheets that open forward and outward from the side of the needle tube 20 , and the width of opening matches the inner diameter of the sleeve 10 ; The sheet body that expands backwards and outwards has an expansion range greater than the inner diameter of the sleeve 10; the aforementioned two guide protrusions 25 are cuboids combined with the side of the needle tube 20, and the shape of the end is matched to the guide groove of the aforementioned sleeve 10 14.

Please refer to FIG. 3 again, which is a cross-sectional view of the present invention. The guide protrusion 25 formed on the side of the needle tube 20 and the guide protrusion 221 formed on the side of the impact plate 22 of the needle tube 20 correspond to the guide groove 14 formed on the inner wall of the sleeve 10, so that the needle tube 20 is positioned in the sleeve 10. The displacement is guided and restrained by the guide groove 14 .

The above-mentioned blood collection needle 30 is fixed inside the needle tube 20 by embedded injection molding or other manufacturing methods, and its needle head 31 protrudes from the nozzle 21 of the needle tube 20, and the sealing member 40 is removed after the needle head 31 is sterilized. In the case of a sterile environment, it is combined with the nozzle 21 of the needle tube 20, or it is integrally formed with the needle tube 20 in a sterile environment to embed the sterilized blood collection needle 30 needle head 31. Only in the case of one-piece molding, the junction of the sealing member 40 and the spout 21 of the needle tube 20 forms a weaker connection covering state, so that the sealing member 40 can be removed by twisting to expose the needle 31 during use.

Please refer to FIG. 4 and FIG. 5 , which are respectively schematic cross-sectional views of the action of the present invention. When assembling the blood collection needle module of the present invention, the needle tube 20 combined with the blood collection needle 30 and the sealing member 40 is inserted into the rear mouth 11 of the sleeve 10 from the sealing member 40 . When inserting, align the guide protrusion 25 and the guide protrusion 221 on the side of the impact plate 22 with the guide groove 14 on the inner wall of the sleeve 10 and insert; The expansion direction of the needle tube is backward and outward. When the force is continuously applied to push the needle tube 20 to insert it into the sleeve 10, the stopper 23 will be restricted by the rear barrel mouth 11 and retract inwardly. 20 continues to advance to the braking hole 15 of the sleeve 10 where its brake pad 23 corresponds, and the brake pad 23 resumes the open state there. At this time, because the opening of the stopper 23 is larger than the inner diameter of the sleeve 10 , the end of the stopper 23 can be locked against the stopper hole 15 to restrict the needle tube 20 in the sleeve 10 .

Please refer to FIG. 6 again, which is a schematic view of the present invention. The blood collection needle module of the present invention is mounted on a blood collection gun 50 including a striker 51 when in use. The user holds the plate-shaped part formed at the front end of the sealing member 40 and twists it to separate it from the nozzle 21 of the needle tube 20 . After the user removes the sealing member 40 , the needle 31 of the blood collection needle 30 is exposed outside the nozzle 21 of the needle tube 20 , but the needle 31 of the blood collection needle 30 is still located in the sleeve 10 .

At this time, the needle outlet 13 of the sleeve 10 is aligned with the blood collection wound, and the striker 51 of the blood collection gun 50 hits the impact plate 22 of the needle tube 20, so that the needle tube 20 can move forward with the exposed needle head 31. Sliding, so that the needle 31 pops out of the needle outlet 13, and punctures the blood collection wound; the shrapnel 24 formed on the side of the needle tube 20 is pressed by the inclined surface 12 during the forward stroke and retracts inwardly, accumulating elastic potential energy; After exiting the blood collection wound, the shrapnel 24 releases the elastic potential energy and pulls the needle tube 20 back, so that the needle 31 returns to the inside of the sleeve 10 .

It can be understood from the above description that the specific structure and usage method of the present invention can indeed provide a lancet module that is easy to assemble and can be ejected smoothly.

Although the present invention has been disclosed with specific embodiments, it is not intended to limit the present invention. Any person skilled in the art can make replacements of equivalent components without departing from the concept and scope of the present invention, or replace them according to the present invention. The equivalent changes and modifications made in the scope of patent protection shall still fall within the scope of this patent.

Claims (9)

1. a blood taking needle module is characterized in that: include a sleeve, a needle tubing and a blood taking needle; Wherein:

This sleeve is a cylindrical shell, and the end forms a back nozzle thereafter, and its leading portion inwall is restrained forward and formed at least one inclined-plane, forms a needle outlet in barrel forward end portion;

This sleeve lateral wall is formed with at least one brake hole;

This needle tubing is a hollow body, is arranged in this sleeve inner; The needle tubing leading section forms a mouth of pipe again, and its rear end is combined with a shock plate, and the external diameter of this shock plate is matched with the internal diameter of back nozzle; This needle tubing side forms at least one brake(-holder) block and at least one shell fragment that is butted on sleeve leading portion inclined-plane that is butted on the sleeve lateral wall brake hole;

This blood taking needle is fixedly arranged on this needle tubing inside, and its syringe needle stretches out this needle tubing mouth of pipe.

2. blood taking needle module as claimed in claim 1 is characterized in that: this sleeve lateral wall is formed with two brake holes; This needle tubing side formation two is butted on the brake(-holder) block of sleeve lateral wall brake hole.

3. blood taking needle module as claimed in claim 2 is characterized in that: this sleeve leading portion inwall is restrained forward and is formed two inclined-planes; This needle tubing side formation two is butted on the shell fragment on this inclined-plane.

4. blood taking needle module as claimed in claim 1 is characterized in that: this needle tubing side forms at least one guiding projection, and this sleeve lining is formed with at least one axial guide groove from the rear end to front end; This guiding projection is corresponding to this guide groove.

5. blood taking needle module as claimed in claim 4 is characterized in that: the shock plate side of this needle tubing forms at least one guiding raised line; This guiding raised line is corresponding to this guide groove.

6. blood taking needle module as claimed in claim 4 is characterized in that: this needle tubing side forms two guiding projections, and the shock plate side of needle tubing forms two guiding raised lines, and this sleeve lining is formed with two axial guide grooves from the rear end to front end; This guiding projection and guiding raised line are corresponding to this guide groove.

7. as each described blood taking needle module of claim 1 to 6, it is characterized in that: this brake(-holder) block is the outside backward open lamellar body from the needle tubing side.

8. as each described blood taking needle module of claim 1 to 6, it is characterized in that: this shell fragment is the outside forward open lamellar body from the needle tubing side.

9. as each described blood taking needle module of claim 1 to 6, it is characterized in that: this syringe needle is by envelop piece institute fit, and this envelop piece extends outside the telescopic needle outlet from this needle tubing mouth of pipe.

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