CN212592141U - Blood sampling needle without rubber sleeve - Google Patents
Blood sampling needle without rubber sleeve Download PDFInfo
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- CN212592141U CN212592141U CN202021747456.1U CN202021747456U CN212592141U CN 212592141 U CN212592141 U CN 212592141U CN 202021747456 U CN202021747456 U CN 202021747456U CN 212592141 U CN212592141 U CN 212592141U
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Abstract
The utility model relates to the technical field of blood taking needles, in particular to a rubber sleeve-free blood sampling needle, which comprises a needle holder, wherein the needle holder comprises a sleeve and a needle seat fixed at the front end of the sleeve, the interior of the needle seat is hollow, the interior of the needle seat is sequentially provided with a blood section, a limiting section and a sliding section from the outside of the sleeve to the inside of the sleeve, and the inner diameters of the blood section, the limiting section and the sliding section are sequentially reduced; the syringe needle comprises a pintle and a needle stem fixed at the front end of the pintle, and the pintle is tightly sleeved at the front end of the needle seat; the puncture assembly comprises a needle base and a puncture needle, the needle base is located inside the needle seat, the needle base comprises a sliding part and a limiting part, the sliding part is in tight sliding connection with the sliding section, the limiting part is matched with the limiting section, the puncture needle is fixed at the rear end of the needle base, and a blood channel communicated with the inside of the puncture needle is formed in the position, close to the limiting part, of the sliding part. The blood taking needle has no problem of blood leakage when in use, and can realize blood taking for many times.
Description
Technical Field
The utility model relates to a blood taking needle technical field, concretely relates to rubber sleeve-free blood sampling needle.
Background
Modern medicine requires blood tests to be performed in the diagnosis of many diseases to determine whether certain criteria are out of specification. Clinically, use double-end blood taking needle to be equipped with the collection mode of vacuum test tube as human blood sample and used a large amount of, double-end blood taking needle includes the needle file, and the needle file front end is equipped with the needle tubing that is used for puncturing patient's skin, and the rear end is equipped with the pjncture needle that is used for impaling the vacuum test tube rubber stopper, and the outside cover of pjncture needle is equipped with the elastic rubber cover, and the needle file rear end still is equipped with and holds needle ware.
During blood sampling, the double-head blood taking needle is installed on a needle holder, a needle tube at the front end of a needle seat is inserted into a blood vessel under the skin of a patient, a vacuum blood taking tube is inserted into a puncture needle positioned in the needle holder, and the blood sample can be collected by utilizing vacuum negative pressure. The double-end blood taking needle on the market at present claims can carry out a lot of blood samplings to same case, but the elastic rubber sleeve of establishing outside the pjncture needle can not play the elastic sealing effect after a lot of punctures, can appear blood leakage, and clinical discovery is present effective blood sampling number of times of double-end blood taking needle and is less than 6, if the number of times of taking a blood sample exceeds 6, then need to change the double-end blood taking needle and puncture once more, reduces blood sampling efficiency, increases patient's misery.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that above-mentioned exists, designed a no gum cover blood sampling needle that can realize blood sampling many times.
In order to realize the technical purpose, reach above-mentioned technological effect, the utility model discloses a realize through following technical scheme:
a blood sampling needle without a rubber sleeve comprises
The needle holder comprises a sleeve and a needle seat fixed at the front end of the sleeve, the needle seat is hollow, a blood section, a limiting section and a sliding section are sequentially arranged in the needle seat from the outside of the sleeve to the inside of the sleeve, and the inner diameters of the blood section, the limiting section and the sliding section are sequentially reduced;
the syringe needle comprises a pintle and a needle stem fixed at the front end of the pintle, and the pintle is tightly sleeved at the front end of the needle seat;
the puncture assembly comprises a needle base and a puncture needle, the needle base is located inside the needle seat, the needle base comprises a sliding part and a limiting part, the sliding part is in tight sliding connection with the sliding section, the limiting part is matched with the limiting section, the puncture needle is fixed at the rear end of the needle base, and a blood channel communicated with the inside of the puncture needle is formed in the position, close to the limiting part, of the sliding part.
Further, the needle base is made of medical grade plastic materials.
Further, the length of the needle base sliding part is larger than that of the sliding section, and the diameter of the needle base sliding part is larger than the inner diameter of the sliding section by 0.02-0.1 mm.
Furthermore, the inner wall of the blood section is provided with a limiting bulge, the cross section of the limiting bulge is arc-shaped with high middle part and low two sides, and the thickness of the middle part of the limiting bulge is larger than the difference value of the inner diameters of the limiting section and the blood section.
Furthermore, spacing arch has a plurality ofly, and is a plurality of spacing arch is in the inner wall of blood section sets up along circumference interval.
Further, the distance between the limiting protrusion and the limiting section is larger than the distance between the blood channel and the front end of the limiting part.
Further, the internal diameter of blood section, spacing section and sliding section is 2.85mm, 2.7mm and 2.5mm in proper order, the length of blood section, spacing section and sliding section is 8.5mm, 1mm and 4.7mm in proper order.
The utility model has the advantages that:
the blood taking needle has no problem of blood leakage when in use, can realize multiple times of blood taking, improves the blood taking efficiency and reduces the pain of patients; the blood taking needle does not use a rubber sleeve, so that the pollution to the environment is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a perspective view of the blood collection needle of the present invention;
FIG. 2 is a side view of the blood collection needle of the present invention;
FIG. 3 is a longitudinal cross-sectional view of FIG. 2;
FIG. 4 is a sectional view of the needle holder of the present invention;
FIG. 5 is an enlarged view of the structure at A in FIG. 4;
fig. 6 is a schematic view of the spike assembly of the present invention;
FIG. 7 is a state diagram of the vacuum blood collection tube inserted into the puncture needle during use of the present invention;
FIG. 8 is an enlarged view of the structure at B in FIG. 7;
FIG. 9 is a state diagram of the vacuum blood collection tube when the puncture needle is pulled out during the use of the present invention;
fig. 10 is an enlarged view of the structure at C in fig. 9.
In the drawings, the components represented by the respective reference numerals are listed below:
1-needle holder, 11-sleeve, 12-needle seat, 121-blood section, 122-limiting section, 123-sliding section, 2-injection needle, 21-pintle, 22-needle stem, 3-puncture component, 31-needle base, 311-sliding part, 312-limiting part, 32-puncture needle, 33-blood channel, 4-limiting bulge and 5-vacuum blood collection tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-3, a blood sampling needle without a rubber sleeve comprises a needle holder 1, an injection needle 2 and a puncture assembly 3.
Referring to fig. 4-5, the needle holder 1 includes a sleeve 11 and a needle holder 12 fixed at the front end of the sleeve 11, the needle holder 12 is hollow, a blood section 121, a limiting section 122 and a sliding section 123 are sequentially arranged from the outside of the sleeve 11 to the inside of the sleeve 11 in the needle holder 12, the inner diameters of the blood section 123, the limiting section 122 and the sliding section 123 are sequentially reduced, specifically, the inner diameters of the blood section 121, the limiting section 122 and the sliding section 123 are sequentially 2.85mm, 2.7mm and 2.5mm, and the lengths of the blood section 121, the limiting section 122 and the sliding section 123 are sequentially 8.5mm, 1mm and 4.7 mm.
The injection needle 2 comprises a pintle 21 and a needle stem 22 fixed at the front end of the pintle 21, and the pintle 21 is tightly sleeved at the front end of the needle seat 12. The injection needle 2 is a disposable sterile injection needle with a transparent pintle, so that the production cost is saved, and the transparent pintle is convenient for observing whether the blood vessel puncture is successful.
Referring to fig. 6, the puncture assembly 3 includes a needle base 31 and a puncture needle 32, the needle base 31 is located inside the needle holder 12, the needle base 31 includes a sliding portion 311 closely and slidably connected to the sliding section 123 and a limiting portion 312 adapted to the limiting section 122, the puncture needle 32 is fixed at the rear end of the needle base 31, and a blood channel 33 communicated with the inside of the puncture needle 32 is opened at a position of the sliding portion 311 near the limiting portion 312. Specifically, the needle base 31 is made of medical grade plastic material, and may be soft PVC, hard PVC, PP, ABS and other medical plastics. The length of the sliding part 311 of the needle base 31 is larger than that of the sliding section 123 in the needle seat 12, and the diameter of the sliding part 311 of the needle base 31 is larger than the inner diameter of the sliding section 123 by 0.02-0.1 mm.
As preferred scheme, the inner wall of blood section 121 is provided with and is used for spacing arch 4 to needle base 31 when inserting vacuum test tube, and for manufacturing, practice thrift manufacturing cost, spacing arch 4 and needle file 12 integrative injection moulding, the cross-section of spacing arch 4 is the circular-arc that the high both sides in middle part are low, and the thickness in spacing arch 4 middle part is greater than the internal diameter difference of spacing section 122 and blood section 121. The limiting bulges 4 are multiple, and the limiting bulges 4 are arranged on the inner wall of the blood section 121 at intervals along the circumferential direction. The distance between the stopper projection 4 and the stopper section 122 is larger than the distance between the blood channel 22 and the front end of the stopper portion 312.
During production and manufacturing, after the needle holder 1, the injection needle 2 and the puncture component 3 are respectively manufactured, the puncture component 3 is inserted into the needle base 12 from the front end of the needle base 12, the limiting part 312 of the needle base 31 passes over the limiting bulge 4 and is matched with the limiting section 122 in the needle base 12 under the action of external force, at the moment, the sliding part 311 of the needle base 31 is tightly matched with the sliding section 123 in the needle base 12, the blood channel 33 arranged on the sliding part 311 is blocked by the sliding section 123 in the needle base 12, and the assembled blood taking needle can meet the requirement of blood taking for the first time as shown in fig. 3.
The working principle is as follows: during blood collection, the needle stem 22 of the injection needle 2 is inserted into a blood vessel of a patient, as shown in fig. 7-8, the vacuum blood collection tube 5 is inserted into the sleeve 11 from the rear end of the needle holder 1, when the vacuum blood collection tube 5 is inserted into the puncture needle 32, resistance between a rubber plug of the vacuum blood collection tube and the puncture needle causes the needle base 31 to move towards the limiting protrusion 4 in the needle base 12, the blood channel 33 on the sliding part 311 of the needle base 31 is separated from the sliding section 123, blood enters the blood channel 33 through a gap between the blood section 121 in the needle base 12 and the needle base 31, and then enters the vacuum blood collection tube 5 through the puncture needle 32; after the blood collection is completed, as shown in fig. 9-10, the vacuum blood collection tube 5 is pulled out, the limit part 312 of the needle base 31 moves towards the limit section 122 inside the needle base 12 and finally is tightly matched with the limit section 122 through the resistance between the rubber plug of the vacuum blood collection tube and the puncture needle when the needle is pulled out from the vacuum blood collection tube 5, and at this time, the blood channel 33 on the sliding part 311 of the needle base 31 is blocked by the sliding section 123 inside the needle base 12, so that the blood cannot flow out. The blood taking needle has no problem of blood leakage when in use, and can realize blood taking for many times.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should be able to make changes, alterations, additions or substitutions within the scope of the present invention.
Claims (7)
1. A blood sampling needle without a rubber sleeve is characterized in that: comprises that
The needle holder comprises a sleeve and a needle seat fixed at the front end of the sleeve, the needle seat is hollow, a blood section, a limiting section and a sliding section are sequentially arranged in the needle seat from the outside of the sleeve to the inside of the sleeve, and the inner diameters of the blood section, the limiting section and the sliding section are sequentially reduced;
the syringe needle comprises a pintle and a needle stem fixed at the front end of the pintle, and the pintle is tightly sleeved at the front end of the needle seat;
the puncture assembly comprises a needle base and a puncture needle, the needle base is located inside the needle seat, the needle base comprises a sliding part and a limiting part, the sliding part is in tight sliding connection with the sliding section, the limiting part is matched with the limiting section, the puncture needle is fixed at the rear end of the needle base, and a blood channel communicated with the inside of the puncture needle is formed in the position, close to the limiting part, of the sliding part.
2. The rubber-sheath-free blood collection needle according to claim 1, wherein: the needle base is made of medical grade plastic materials.
3. The rubber-sheath-free blood collection needle according to claim 2, wherein: the length of the needle base sliding part is greater than that of the sliding section, and the diameter of the needle base sliding part is greater than the inner diameter of the sliding section by 0.02-0.1 mm.
4. The rubber-sheath-free blood collection needle according to claim 1, wherein: the inner wall of blood section is provided with spacing arch, spacing bellied cross-section is the circular-arc that the high both sides in middle part are low, the thickness at spacing bellied middle part is greater than spacing section with the internal diameter difference of blood section.
5. The rubber-sheath-free blood collection needle according to claim 4, wherein: the limiting bulges are multiple and are arranged on the inner wall of the blood section at intervals along the circumferential direction.
6. The rubber-sheath-free blood collection needle according to claim 5, wherein: the distance between the limiting bulge and the limiting section is larger than the distance between the blood channel and the front end of the limiting part.
7. The rubber-sheath-free blood collection needle according to claim 1, wherein: the internal diameter of blood section, spacing section and sliding section is 2.85mm, 2.7mm and 2.5mm in proper order, the length of blood section, spacing section and sliding section is 8.5mm, 1mm and 4.7mm in proper order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021747456.1U CN212592141U (en) | 2020-08-20 | 2020-08-20 | Blood sampling needle without rubber sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021747456.1U CN212592141U (en) | 2020-08-20 | 2020-08-20 | Blood sampling needle without rubber sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212592141U true CN212592141U (en) | 2021-02-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021747456.1U Active CN212592141U (en) | 2020-08-20 | 2020-08-20 | Blood sampling needle without rubber sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212592141U (en) |
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2020
- 2020-08-20 CN CN202021747456.1U patent/CN212592141U/en active Active
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