CN114762601A - Blood taking needle and blood taking device comprising same - Google Patents

Abstract

The invention discloses a blood taking needle and a blood taking device formed by the same, belonging to the field of medical equipment and comprising a needle head and a protective sleeve which are of an integrated structure, wherein the protective sleeve is coated on the outer side of the needle head, the needle head axially and downwards penetrates through the protective sleeve, the lower end of the needle head is provided with a sleeve head, and the sleeve head is made of a softer material; the protective sheath is including the drive section that is located the upper end and the canned paragraph that is located the lower extreme, the canned paragraph cladding is in the outside of syringe needle, the upper end in canned paragraph one side is established to the drive section, the drive section is protruding and be located the inboard thin wall region of lower extreme including the third location that is located the inboard hangers in upper end, is located middle outer lane. The blood taking needle has the advantages that multiple needles can be used simultaneously, the occupied space is small, the structure is compact, the number of coating layers outside the blood taking needle is small, the cost is saved, the operation is convenient, the medical waste treatment cost is reduced, and the part in contact with a human body is always in a protection state to prevent external infection.

Description

Blood collection needle and blood collection device composed thereof

technical field

The invention belongs to the field of medical equipment, and relates to a blood collection pen, in particular to a blood collection device composed of a plurality of blood collection needles.

Background technique

The lancet is used for blood sampling, routine physical examination, blood sugar check, etc., which requires a lancet. The lancet is a kind of lancet. The structure uses a mechanical device, and the needle adopts an ejection device, which can be almost completely accurate and fast. , Moderate depth, straight line piercing the skin, greatly reducing the pain of the patient, making sampling enter a new stage of development, basically solving the problems of strong pain and large wounds of the previous two generations of blood collection needles.

At present, the commonly used lancets on the market are mostly plastic-coated and disposable. When using, the end needs to be removed and then placed on the lancet for use, which is cumbersome and time-consuming. Each small needle needs to be equipped with an external fixing sleeve, and it is a disposable product, which consumes a lot of money. In addition to the increase in cost, it also brings certain difficulties to the subsequent medical waste disposal, and this structure occupies a large space and is difficult to The structure of the multi-head lancet is realized. The common multi-head structure on the market is that multiple heads act simultaneously. The required cavity is large and the structure is not flexible enough. The existing lancet will be exposed to bacteria after removing the protective head at the front end. There is a risk of infection if used again after prolonged exposure.

The traditional lancet is made of a plastic material. When using, the part of the material covering the needle tip needs to be manually disposed of, and then the lancet is fired. The lancet moves forward under the force of the lancet, puncturing the skin to collect blood, which is time-consuming. It is laborious, especially the elderly are more difficult to operate.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the first object of the present invention is to provide a blood collection needle.

A second object of the present invention is to provide a blood collection device composed of the above-described blood collection needle.

In order to achieve the above-mentioned first object, the present invention is achieved by the following technical solutions: a blood collection needle, comprising a needle head and a protective cover of an integrated structure, the protective cover is wrapped on the outside of the needle head, and the needle head is axially downward Passing through the protective cover, the lower end of the needle is provided with a cover;

The protective sleeve includes a driving section at the upper end and a fixing section at the lower end, the fixing section covers the outside of the needle, and the driving section is arranged at the upper end of one side of the fixing section.

Further, the driving section includes a hanging lug protrusion located on the inner side of the upper end, a third positioning protrusion located on the middle outer ring, and a thin-walled area located on the inner side of the lower end.

Further, the thin-walled area is located at the upper end of the fixing section, and is concavely arranged to the outside.

With the above technical solution, the thin-walled area is set up, which is beneficial to the force deformation of the driving section, because the cross-sectional area of the thin-walled area is relatively small during the driving process of the protective cover, which is conducive to the bending of the thin-walled area, thereby realizing protection. The force deformation of the sleeve avoids stress concentration and improves the stability of the structure.

Further, the hardness of the cannula is smaller than the hardness of the needle.

Further, the sleeve head is made of silicone, soft rubber, PPU or PVC.

Specifically, in the initial state, the needle is provided in the cannula, and when in use, the needle passes through the cannula. Since the cannula is made of a material with low hardness, it is convenient for the needle to pass through the cannula.

Further, the fixed section and the needle are coaxially arranged and the two are integrally formed by injection molding.

Further, the protective cover is made of engineering plastics.

In order to achieve the above-mentioned second object, the present invention is achieved by the following technical solutions: a blood collection device composed of a blood collection needle, comprising a driving rod, the lower end of the driving rod is provided with a fourth positioning protrusion, and the fourth positioning protrusion is provided on the lower end of the driving rod. The positioning protrusion is provided with a first inclined surface and a first horizontal surface, and the hanging ear protrusion is provided with a second inclined surface and a second horizontal surface.

Specifically, when the driving rod moves downward, the first inclined surface does not contact the second inclined surface; when the driving rod moves upward, the first horizontal surface provided on the fourth positioning protrusion and the first horizontal surface provided on the lower end of the hanging lug protrusion The two horizontal planes fit together, and the driving rod drives the protrusion of the hanging lug to move upward, which in turn drives the needle to move upward.

Further, it also includes a plurality of blood collection needles, the plurality of blood collection needles are all arranged in the fixed needle cylinder, the plurality of the blood collection needles are evenly arranged relative to the axis of the fixed needle cylinder, and the fixed needle cylinder is provided with The third positioning notch, the third positioning protrusion is correspondingly provided with the third positioning notch on the fixed needle cylinder.

Further, when the third positioning protrusion does not correspond to the third positioning notch, the driving section is in interference fit with the inner wall of the fixed needle cylinder, and the driving section bends in the thin-walled area;

When the third positioning protrusion corresponds to the third positioning notch, the third positioning protrusion protrudes into the third positioning notch, and at this time, the driving section is in a straight state.

Further, the upper end of the driving segment is provided with a third inclined surface, and the cross section formed by the upper end of the driving segment is a wedge-shaped structure.

Specifically, in the initial state, the third positioning protrusion is placed in the third positioning notch. When the driving rod moves downward, the fourth positioning protrusion and the hanging lug protrusion are not in contact, and the protective cover Deformation occurs in the thin-walled area, and the protective sleeve is bent toward the central axis to realize the extension of the needle. When the driving rod moves upward, due to the deformation of the thin-walled area, the first horizontal plane contacts the second horizontal plane, which in turn drives the protective sleeve upward. Movement to achieve needle retraction.

Compared with the prior art, the present invention has the following advantages and positive effects.

(1) The structure of the present invention is simple and compact, the diameter of the protective sleeve is slightly larger than the needle head, and the covering of the needle head is realized. This structure can realize the simultaneous use of multiple needle heads, occupies a small space, and has a compact structure. Less coating, saving cost, reducing the cost of medical waste disposal, at the same time, the needle part is always in a protected state to prevent the risk of infection, it is not necessary to manually remove the cannula at the front end when using, and the blood collection needle can be directly fired when it is forcefully fired. The material at the needle tip is pierced to expose the needle tip for blood collection, which saves time and effort and is convenient to use.

(2) The present invention provides a first inclined plane and a second inclined plane, which avoids the rigid contact between the two during the descending process of the driving rod, and the fourth positioning protrusion plays a role in gradually expanding the hanging lug protrusion, and after continuing to descend Press down on the protective cover to drive its movement.

(3) When the third positioning protrusion of the blood collection needle reaches the third positioning notch position of the fixed needle cylinder, the plastic part of the rear section of the blood collection needle changes from a bent state to a straight state under the action of its own elasticity, and the hanging ear is raised. The fourth positioning protrusion is separated from the driving rod, which realizes the separation of the blood collection needle and the driving rod, ensures that the driving rod rises and resets, and realizes the next action after the rotation of the fixed needle cylinder.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the structural representation of a kind of blood collection needle of the present invention;

Fig. 2 is a combination diagram of the arrangement of a plurality of lancets of the present invention;

3 is a cross-sectional view of a plurality of blood collection needles of the present invention after being matched with a fixed syringe;

Fig. 4 is the structural representation of the fixed syringe of the present invention;

Fig. 5 is the structural representation of the drive rod of the present invention;

FIG. 6 is an enlarged view of C in FIG. 5 of the present invention.

Reference number:

11. Needle head; 12. Protective sleeve; 121. Fixed segment; 122. Driving segment; Area; 1226, the third bevel; 21, the fixed needle cylinder; 211, the third positioning notch; 212, the needle outlet; 13, the sleeve; 61, the driving rod; 611, the fourth positioning protrusion; 6111, the first bevel; 6112. The first horizontal plane.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

Next, the present invention is described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the sectional views showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not be limited here. The scope of protection of the present invention. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual production.

Again, it should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1-FIG. 6, a blood collection needle includes a needle 11 and a protective sheath 12 of an integrated structure. The protective sheath 12 is wrapped on the outside of the needle 11. The needle 11 axially passes through the protective sheath 12 downward. The needle 11 The lower end is provided with a sleeve 13, the hardness of the sleeve 13 is less than that of the needle 11, and adopts a soft rubber structure, specifically silicone, soft rubber, PPU or PVC, and the sleeve 13 has a certain protective effect on the needle 11. In the initial state, the needle 11 It is embedded inside the cannula 13 to prevent the needle 11 from being polluted in contact with the air and improve safety. When in use, the needle 11 passes through the cannula 13 and protrudes out of the cannula 13 surface. Because the cannula 13 adopts a soft rubber structure, it does not affect the telescopic use of the needle 11 ;

The protective sleeve 12 includes a driving segment 122 at the upper end and a fixing segment 121 at the lower end. The fixing segment 121 covers the outside of the needle 11 , the driving segment 122 is arranged on the upper end of one side of the fixing segment 121 , and the driving segment 122 includes the inner side of the upper end. The mounting lug protrusions 1221, the third positioning protrusions 1224 on the middle outer ring, and the thin-walled area 1225 located on the inner side of the lower end, the mounting lug protrusions 1221 are convenient to be used in correspondence with the fourth positioning protrusions 611 on the drive rod 61. , the setting of the third positioning protrusion 1224 can cooperate with the third positioning notch 211 on the fixed needle cylinder 21 to realize the limitation of the upper limit position of the protective sleeve 12, and the front end of the sleeve head 13 is set on the same level as the bottom surface of the fixed needle cylinder 21, At the same time, the diameter of the sleeve head 13 is larger than the diameter of the needle outlet hole 212 provided at the bottom of the fixed needle cylinder 21 , which ensures that the needle head can pass through the sleeve head 13 and out of the needle outlet hole 212 , while the sleeve head 13 is left in the fixed needle cylinder 21 . , this structure can also play a role in positioning the blood collection needle assembly in the axial direction; the setting of the thin-walled area 1225 is conducive to the force and deformation of the driving section 122, because in the process of driving the protective sleeve 12, the thin-walled area The cross-sectional area of the region 1225 is relatively small, which is beneficial to the bending of the thin-walled region 1225, thereby realizing the force deformation of the protective cover 12, avoiding stress concentration, and improving the stability of the structure.

In this embodiment, in the initial state, the needle 11 is set in the cannula 13. When in use, the needle 11 passes through the cannula 13 and protrudes out. The cannula 13 is solid soft rubber, and can also be silicone, soft rubber, PPU or PVC. , it is sufficient to ensure that the hardness of the cannula 13 is less than that of the needle 11 , so that the needle 11 can pass through the cannula 13 and the needle 11 can be protruded.

In this embodiment, the fixed section 121 and the needle 11 are coaxially arranged and the two are integrally formed by injection molding, which can reduce costs during mass production. The cross-sectional area of the fixed section 121 is less than 8 times the cross-sectional area of the needle 11, preferably 4 -5 times, compared with the existing disposable needle 11, the volume is greatly reduced, but the volume of the needle 11 is slightly larger, which provides the possibility for the storage of multiple needles.

As shown in FIG. 5 and FIG. 6 , the lower end of the driving rod 61 is provided with a fourth positioning protrusion 611, the fourth positioning protrusion 611 is provided with a first inclined surface 6111, and the hanging ear protrusion 1221 is provided with a second inclined surface 1222, The driving rod 61 moves downward, and then drives the needle 11 to move downward. The setting of the first inclined surface 6111 and the second inclined surface 1222 prevents the two from being in hard contact; The horizontal surface 6112 is in contact with the second horizontal surface 1223 provided at the lower end of the hanging ear protrusion 1221, so that the driving rod 61 drives the hanging ear protrusion 1221 to move upward; in the initial state, the third positioning protrusion 1224 is placed in the third positioning gap 211 , when the driving rod 61 moves downward, the fourth positioning protrusion 611 is not in contact with the hanging lug protrusion 1221, the protective cover 12 is deformed in the thin-walled area 1225, and the protective cover 12 is bent in the direction of the central axis. When the needle is extended, when the driving rod 61 moves upward, due to the deformation of the thin-walled area 1225, the first horizontal surface 6112 contacts the second horizontal surface 1223, thereby driving the protective cover 12 to move upward to realize the retraction of the needle.

In this embodiment, the plurality of needle heads 11 are all arranged in the fixed needle cylinder 21 , and the plurality of needle heads 11 are evenly arranged relative to the axis of the fixed needle cylinder 21 . The fixed needle cylinder 21 is provided with a third positioning notch 211 and a third positioning convex The bulge 1224 is set corresponding to the third positioning notch 211 on the fixed needle cylinder 21, the protective cover 12 is made of engineering plastic material, and the protective sleeve 12 moves up and down relative to the fixed needle cylinder 21. When corresponding, the blood collection needle is in interference fit with the inner wall of the fixed syringe 21, and the protective cover 12 is bent in the thin-walled area 1225; when the third positioning protrusion 1224 corresponds to the third positioning gap 211, the protective cover 12 acts on its own elasticity. The bottom shows a straight state, the third positioning protrusion 1224 extends into the third positioning gap 211, the protective sleeve 12 and the fixed needle cylinder 21 are made of engineering plastics, and have elasticity, so that the third positioning protrusion 1224 can be used for the protective sleeve 12. The third positioning protrusion 1224 is an inverted cone whose diameter gradually decreases from the inside to the outside, which facilitates the up and down movement of the protective cover 12 and ensures smooth movement.

In the initial state, the third positioning protrusion is placed in the third positioning gap, the protective cover 12 is in a straight state, the upper end of the protective cover 12 is provided with a third inclined surface 1226, and the cross section formed by the upper end of the protective cover 12 is a wedge-shaped structure, and The third inclined surface 1226 and the second inclined surface 1222 are symmetrically arranged, and the structure is stable, which ensures the smoothness of the blood collection needle when returning to the original position. When the protective cover 12 returns to the initial position, the protective cover 12 is in a straight state.

In this embodiment, the thin-walled region 1225 is located at the upper end of the fixing section 121 and is concave to the outside, so that it is convenient to bend inward here and avoid stress concentration.

working principle:

During the application process, a plurality of blood collection needles are first set in the fixed needle cylinder 21, the driving rod 61 moves downward, and the lower end of the driving rod 61 is pressed against the plane in contact with the thin-walled area 1225. The protective sheath 12 drives the needle 11 to move downward, which is convenient for blood collection of the patient. The sheath 13 wraps the needle tip before firing, so as to protect the needle tip from external infection, so that the needle tip is always in a sterile state, and the needle tip penetrates the sheath after firing. 13, pierce the skin of the human body, puncture the skin to take blood, during this process, due to the blocking of the cannula 13 by the fixed needle cylinder 21, the needle 11 passes through the cannula 13 and extends out of the fixed needle cylinder 21, and the third positioning protrusion 1224 leaves The third positioning notch 211 also shrinks inwardly, so that the third positioning protrusion 1224 can extend downward into the fixed needle cylinder 21, and at the same time, the protective sleeve 12 is bent inward in the thin-walled area 1225, and the axial projection of the second horizontal plane 1223 falls. on the first horizontal plane 6112. After the blood collection is completed, the needle 11 is reset. During the reset process, the fourth positioning protrusion 611 on the driving rod 61 corresponds to the hanging ear protrusion 1221, the first horizontal surface 6112 and the second horizontal surface 1223 are in contact, and the driving rod 61 moves upward to drive the protection. The sleeve 12 and the needle head 11 move upward, and then drive the fixed needle cylinder 21 to rotate by an angle, so as to realize the driving of the next needle head 11 and the protective sleeve 12 by the driving rod 61 .

The blood collection needle of the present invention occupies a small space, realizes the storage of a plurality of needles 11, and is beneficial to medical workers for continuous operation for many times.

The sleeve head 13 of the blood collection needle of the present invention is composed of a material softer than the needle tip, and it is not necessary to manually remove the sleeve head 13 at the front end position. This operation saves time and effort and is convenient to use, and because the frequency of using blood for blood sugar detection is high, the use time is greatly reduced, and more convenience is provided to the patient's life.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A blood collection needle, characterized in that it comprises a needle head (11) and a protective cover (12) of an integrated structure, the protective cover (12) is wrapped on the outside of the needle head (11), and the needle head (11) ) axially downward through the protective sleeve (12), the lower end of the needle head (11) is provided with a sleeve head (13); The protective cover (12) includes a driving section (122) at the upper end and a fixing section (121) at the lower end, the fixing section (121) wrapping the outside of the needle (11), and the driving section (122) It is arranged at the upper end of one side of the fixed section (121). 2 . The blood collection needle according to claim 1 , wherein the driving section ( 122 ) comprises a hanging lug protrusion ( 1221 ) located on the inner side of the upper end, and a third positioning protrusion ( 1224 ) located on the middle outer ring. 3 . ) and a thin-walled region (1225) inside the lower end. 3. A blood collection device composed of a blood collection needle according to claim 2, wherein the thin-walled region (1225) is located at the upper end of the fixed section (121), and is concavely arranged to the outside. 4 . The blood collection needle according to claim 3 , wherein the hardness of the cannula ( 13 ) is smaller than the hardness of the needle ( 11 ). 5 . 5 . The blood collection needle according to claim 4 , wherein the sleeve head ( 13 ) is made of silica gel, soft rubber, PPU or PVC. 6 . 6 . The blood collection needle according to claim 5 , wherein the fixed section ( 121 ) and the needle head ( 11 ) are arranged coaxially and are integrally formed by injection molding. 7 . 7 . The blood collection device composed of a blood collection needle according to claim 6 , wherein the protective cover ( 12 ) is made of engineering plastic material. 8 . 8. A blood collection device composed of a blood collection needle according to any one of claims 1-7, characterized in that it comprises a driving rod (61), and a fourth positioning protrusion is provided at the lower end of the driving rod (61). (611), the fourth positioning protrusion (611) is provided with a first inclined surface (6111) and a first horizontal surface (6112), and the hanging lug protrusion (1221) is provided with a second inclined surface (1222) and the second level (1223). 9. A blood collection device composed of blood collection needles according to claim 8, characterized in that it further comprises a plurality of blood collection needles, and the plurality of blood collection needles are all arranged in the fixed needle cylinder (21), and a plurality of the blood collection needles are arranged in the fixed needle cylinder (21). The blood collection needles are evenly arranged relative to the axis of the fixed needle cylinder (21), the fixed needle cylinder (21) is provided with a third positioning notch (211), and the third positioning protrusion (1224) is connected to the fixed needle. The third positioning notch (211) on the barrel (21) is correspondingly arranged. 10. A blood collection device composed of a blood collection needle according to claim 9, wherein the upper end of the driving section (122) is provided with a third slope (1226), and the upper end of the driving section (122) is formed with a third inclined surface (1226). The section is wedge-shaped.

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