CN107007904B

CN107007904B - Safety butterfly needle

Info

Publication number: CN107007904B
Application number: CN201710252915.5A
Authority: CN
Inventors: 汪贤宗; 张洪瑜
Original assignee: Anhui Hongyu Wuzhou Medical Manufacturer Co ltd
Current assignee: Anhui Hongyu Wuzhou Medical Manufacturer Co ltd
Priority date: 2017-04-18
Filing date: 2017-04-18
Publication date: 2022-10-21
Anticipated expiration: 2037-04-18
Also published as: CN107007904A

Abstract

The invention relates to the technical field of butterfly needles, in particular to a safe butterfly needle, which comprises: a fixed sleeve (2) with a cavity (21) inside; the needle body (1) comprises a needle head (11) and a fin component (13) which are fixedly arranged in the cavity and axially connected, and the needle head extends out of an opening at the front end of the cavity; protective sheath (3), be the cylindric, the needle main part outside is located to portable setting in fixed cover and cover, and the protective sheath has the retraction position that does not influence the work of syringe needle and moves to the guard position of syringe needle front end in the cavity of fixed cover, and axial groove (31) have been seted up with fin subassembly corresponding position department on the section of thick bamboo wall of protective sheath, and the axial groove allows the fin subassembly to pass when the protective sheath moves to the guard position by retraction position. The invention provides a safe butterfly needle which avoids the liquid in a needle head from leaking and directly dropping on the skin of a medical care worker or the ground due to the vibration caused by the pulling operation of the needle head and a protective sleeve as much as possible.

Description

Safety butterfly needle

Technical Field

The invention relates to the technical field of butterfly needles, in particular to a safe butterfly needle.

Background

In medical practice such as intravenous infusion, blood transfusion, blood collection, arterial and venous hemodialysis, an intravenous infusion needle, an intravenous blood transfusion needle, a venous blood collection needle, an arterial and venous hemodialysis needle, which are conventionally called "butterfly needles", are generally placed on an arteriovenous line for intravenous infusion, an intravenous blood transfusion, a venous vacuum blood collection, or hemodialysis. Such butterfly needles comprise a needle for penetrating into a blood vessel and a needle cap covering the needle. To prevent contamination of the patient with a needle that has been used, the medical staff must load the needle that has been withdrawn from the blood vessel into the original needle cap. However, when the needle is withdrawn after the clinical operation is finished and the original needle cap is sleeved back on the needle by using the traditional butterfly needle, the probability of accidental injury and infection of medical personnel caused by the needle stained with blood of a patient is quite high.

In order to solve the above technical problem, chinese patent document CN205885894U discloses a safety needle set, which includes a joint seat having an insertion hole and two fins, a needle fixing ring having a needle head portion and a tube connecting portion, the tube connecting portion passing through the insertion hole of the joint seat and fixedly connected with the end portion of the liquid medicine catheter, an upper clamping seat and a lower clamping seat assembled at the joint of the needle fixing ring, the joint seat and the liquid medicine catheter, and a sheath sleeved outside the needle fixing ring and movably clamped between the upper clamping seat and the lower clamping seat, wherein once the sheath moves forward to a certain position, the needle head seat and the needle fixing ring of the tube connecting portion are locked inside the sheath, thereby protecting the needle. Although the safety needle set can avoid accidental injury and infection of a needle head to medical care personnel after clinical operation is finished, in order to enable the sheath to smoothly pass through the two fins of the connecting seat to move forwards, the position, which is attached to the surface of a human body injection position, on the side wall of the sheath needs to be hollowed, which can be clearly seen from the attached drawing 6 of the specification of the patent document, so that certain vibration can be generated when the needle head is drawn out from the injection position, and meanwhile, trace vibration can be generated when the sheath is moved to the protection position of the needle head, the liquid in the needle head inevitably leaks a little after the sheath is drawn out due to twice vibration, and as the lower part of the side wall of the sheath is hollowed, the leaked liquid can directly drip on the skin or the ground of the medical care personnel, certain potential safety hazards exist, and certain environmental pollution is caused.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that after a medical worker finishes clinical operation and pulls out a needle and simultaneously pulls out a protective sleeve, liquid in the needle inevitably leaks a little due to vibration caused by two pulling operations, certain potential safety hazards exist, and certain environmental pollution is caused in the butterfly needle in the prior art, so that the butterfly needle avoids the phenomenon that the liquid in the needle leaks due to vibration caused by the pulling operations of the needle and the protective sleeve as much as possible, directly drips on the skin or the ground of the medical worker, has certain potential safety hazards, and reduces the environmental pollution.

Therefore, the technical scheme of the invention provides a safe butterfly needle, which comprises:

the fixing sleeve is internally provided with a cavity;

the needle body comprises a needle head and a fin component which are fixedly arranged in the cavity and are axially connected, and the needle head extends out of the opening at the front end of the cavity;

the protective sleeve is in a cylindrical shape and can be movably arranged in the fixed sleeve and sleeved outside the needle body, the protective sleeve is provided with a retracting position which does not influence the work of the needle head in a cavity of the fixed sleeve and a protecting position which moves to the front end of the needle head, an axial groove is formed in the position, corresponding to the fin component, of the cylinder wall of the protective sleeve, and the fin component is allowed to pass through when the protective sleeve moves from the retracting position to the protecting position.

The front end of the axial groove of the safety butterfly needle is 5-10 mm away from the front end of the protective sleeve.

The rear end of the axial groove of the safe butterfly needle is arranged in an open manner.

The safety butterfly needle, the protective sheath with fixed cover is through setting up the planar structure sliding fit in the two bottoms, just the axial trench is in planar structure's top.

The area of the plane structure of the safety butterfly needle is larger than the projection area of the needle head on the protective sleeve.

The safety butterfly needle is characterized in that a first limiting part is formed at one end, close to the needle head, of the side wall of the fixing sleeve, and a second limiting part, matched with the first limiting part, used for limiting the protective sleeve at the protection position is formed at one end, far away from the needle head, of the sleeve wall of the protective sleeve.

The safety butterfly needle is characterized in that the first limiting part is a hole formed in the side wall of the fixing sleeve, and the second limiting part is a protrusion matched with the hole in a clamped mode.

Safe butterfly needle, first spacing portion is the shaping is in recess on the inside wall of fixed cover, spacing portion of second for with recess joint complex arch.

The safety butterfly needle is characterized in that the second limiting part is provided with a guide inclined plane which guides the protrusion to form clamping fit with the hole or the protrusion to form clamping fit with the groove when the protective sleeve moves from the retracting position to the protecting position.

The safety butterfly needle is characterized in that a first limiting groove is further formed in one end, close to the needle head, of the side wall of the fixing sleeve, a first limiting protrusion matched with the first limiting groove is formed in one end, close to the needle head, of the protective sleeve, and the first limiting protrusion is clamped in the first limiting groove when the protective sleeve is located at the retracting position so as to limit the protective sleeve to move in the direction away from the needle head.

The safety butterfly needle is characterized in that a second limiting groove is further formed in one end, close to the needle head, of the inner side wall of the fixing sleeve, a second limiting protrusion matched with the second limiting groove is formed in the other end, far away from the needle head, of the sleeve wall of the protective sleeve, and the second limiting protrusion is clamped in the second limiting groove when the protective sleeve is located at the protection position so as to limit the protective sleeve to move in the direction of separating from the fixing sleeve.

The safety butterfly needle is characterized in that one end of the fixing sleeve close to the needle head and two opposite side walls of the fixing sleeve are respectively provided with a notch allowing two fins of the fin component to respectively extend out of a cavity of the fixing sleeve, and the size of the notch is consistent with that of the cross section of the extending part of the fin.

The technical scheme of the invention has the following advantages:

1. according to the safety butterfly needle provided by the invention, when the butterfly needle is operated and the needle head needs to be protected against puncture, the protective sleeve is only required to be pulled out of the cavity of the fixed sleeve to the protection position at the front end of the needle head, and the protective sleeve is pulled from the bottom end to the top end of the needle head according to the preset direction, so that the potential safety hazard of puncturing medical personnel can be avoided; and because the section of thick bamboo wall of protective sheath corresponds the position department with the fin subassembly and has seted up the axial groove, not only can make the protective sheath move to the protection position by packing up the position smoothly like this, still make even the pull of syringe needle and protective sheath can produce some vibrations, and then arouse the liquid in the syringe needle to take place a little seepage, these liquid can not directly drip medical personnel's skin or subaerial, but keep in the section of thick bamboo wall bottom at the protective sheath, thereby reduced the potential safety hazard, protected the health of surrounding environment.

2. According to the safety butterfly needle provided by the invention, the distance between the front end of the axial groove and the front end of the protective sleeve is 5-10 mm, so that the possibility that the needle head extends out of the axial groove under the vibration action is effectively prevented, and the protective sleeve plays a due protective role. The rear end of the axial groove is open, so that the protective sleeve and the needle main body can be conveniently installed.

3. According to the safety butterfly needle provided by the invention, the protective sleeve and the fixed sleeve are in sliding fit through the plane structures arranged at the bottoms of the protective sleeve and the fixed sleeve, the axial groove is positioned above the plane structures, the smooth sliding of the protective sleeve in the cavity of the fixed sleeve is ensured due to the arrangement of the plane structures, and meanwhile, liquid leaked from the needle head can be temporarily stored, so that the liquid is effectively prevented from directly dripping on the skin or the ground of medical personnel.

4. According to the safety butterfly needle provided by the invention, the arrangement of the first limiting part and the second limiting part which are matched with each other on the fixed sleeve and the protective sleeve ensures that the protective sleeve does not move for the second time to the retracting position when being positioned at the protective position, so that the protective effect on the needle head is ensured, and meanwhile, the situation that a lawbreaker cleans the needle head for the second time utilization is avoided.

5. According to the safety butterfly needle provided by the invention, the first limiting groove and the first limiting protrusion which are matched with each other on the fixing sleeve and the protective sleeve are arranged, and the second limiting groove and the second limiting protrusion are arranged, so that the protective sleeve cannot move in a direction away from the needle head and away from the fixing sleeve when being located at the retracting position and the protecting position, and the protective sleeve is limited at the current position to play a due role.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a safety butterfly needle provided in a first embodiment of the invention before use;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a safety butterfly needle provided in a first embodiment of the present invention after use;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a schematic view of the protective sheath of FIG. 1;

FIG. 6 is a schematic view of a safety butterfly needle provided in a second embodiment of the invention before use;

FIG. 7 is a cross-sectional view of FIG. 2;

FIG. 8 is a schematic view of a safety butterfly needle provided in a second embodiment of the present invention after use;

fig. 9 is a cross-sectional view of fig. 8.

Description of reference numerals:

1-a needle body; 2, fixing a sleeve; 3-protecting the jacket; 11-a needle head; 12-a liquid delivery tube; 13-a vane assembly; 21-a cavity; 22-a first stop; 23-a first limit groove; 24-slotting; 31-axial grooves; 32-a second limiting part; 33-first limit projection.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

One embodiment of the safety butterfly needle shown in fig. 1 to 5 is described by the position of the butterfly needle in the use state, in which the needle 11 is located at the front end, the liquid delivery tube 12 is located at the rear end, and the butterfly needle is in contact with the skin of the patient at the bottom, and comprises a fixed sleeve 2, inside which a cavity 21 is formed. The fixing sleeve 2 can be integrally formed, and can also be formed by splicing and installing an upper part and a lower part, and the two parts are spliced in the embodiment. Needle body 1 is in including fixed setting the inside and axial connection's of cavity 21 syringe needle 11 and fin subassembly 13, syringe needle 11 follows cavity 21 front end opening part stretches out, and the other end of fin subassembly 13 is connected with liquid delivery pipe 12, and liquid delivery pipe 12 stretches out from cavity 21 rear end opening part to be connected to the liquid bottle of filling. The protective sleeve 3 is cylindrical and is movably arranged in the fixed sleeve 2 and sleeved outside the needle body 1, the protective sleeve 3 has a retraction position which does not affect the work of the needle head 11 in the cavity 21 of the fixed sleeve 2 and a protection position which moves to the front end of the needle head 11, namely before the injection of the needle head 11, the protective sleeve 3 is accommodated in the cavity 21 of the fixed sleeve 2 so as to avoid affecting the normal injection; after the injection of the needle 11 is completed, the protective sleeve 3 is pulled out from the fixed sleeve 2 to cover the front end of the needle 11, so that the needle 11 is protected. An axial groove 31 is formed in the wall of the protective sleeve 3 at a position corresponding to the flap assembly 13, and the axial groove 31 allows the flap assembly 13 to pass through when the protective sleeve 3 moves from the retracted position to the protection position. Since the tab members 13 are generally a pair, the axial slots 31 are also a pair disposed opposite each other, and the height of the axial slots 31 is sufficient to allow the tab members 13 to slide within them, and the length corresponds to the distance that the tab members 13 slide from the stowed position to the protective position.

Specifically, the distance between the front end of the axial groove 31 and the front end of the protective sleeve 3 is 5-10 mm, and the rear end of the axial groove 31 is open. In the process of processing the axial groove 31, a part of the axial groove can be hollowed from one end of the cylinder wall to the other end, and the other end of the cylinder wall is reserved, so that even if the needle 11 is vibrated, the needle cannot extend outwards through the axial groove 31, and accidental injury is avoided. The open setting in axial groove 31 rear end makes the butterfly needle when the equipment, can install fixed cover 2 lower parts, needle main part 1, protective sheath 3 and fixed cover 2 upper portions in proper order, because two fins of fin subassembly 13 all extend along fixed cover 2 is radial outside on needle main part 1 generally, and the open setting is convenient for the equipment of protective sheath 3 and needle main part 1.

The protective sleeve 3 and the fixed sleeve 2 are in sliding fit through a plane structure arranged at the bottoms of the protective sleeve 3 and the fixed sleeve 2, namely, the bottoms of the protective sleeve 3 and the fixed sleeve 2 are both arranged in a plane, other side walls are arc-shaped, the whole body is formed into a deformed cylinder, the plane structure is convenient for the protective sleeve 3 to be stretched in the fixed sleeve 2, and the friction force is small; and the axial groove 31 is located above the planar structure, and the area of the planar structure is larger than the projection area of the needle 11 on the protective sheath 3, so as to ensure that the liquid leaked from the needle 11 directly drops on the planar structure of the protective sheath 3 instead of the skin or the ground.

A first limiting part 22 is formed at one end of the side wall of the fixing sleeve 2 close to the needle 11, that is, the first limiting part 22 is formed at the front end of the fixing sleeve 2, and a second limiting part 32 which is used for limiting the protection sleeve 3 at the protection position and is matched with the first limiting part 22, that is, the second limiting part 32 is formed at the rear end of the protection sleeve 3 is formed at one end of the sleeve wall of the protection sleeve 3 far away from the needle 11. Specifically, the first position-limiting part 22 is a hole formed in the side wall of the fixing sleeve 2, and the second position-limiting part 32 is a protrusion engaged with the hole. The holes are square or rectangular, and the size of the protrusions is suitable for being just clamped into the holes. The front end of the bulge is formed with a guide inclined plane which guides the bulge and the hole to form clamping fit when the protective cover 3 moves from the retracting position to the protecting position, namely the bulge is in a wedge shape. Like this when protective sheath 3 is stretched to the protection position, because protruding mutual joint restriction with the hole, even under the exogenic action, protective sheath 3 also can not remove to the rear end of fixed cover 2, prevented that lawless persons from returning it to the purpose of packing up the position and using repeatedly.

A first limiting groove 23 is formed in one end, close to the needle head 11, of the side wall of the fixing sleeve 2, namely the first limiting groove 23 is formed in the front end of the fixing sleeve 2, a part of the front end of the fixing sleeve 2 is hollowed to form a U-shaped opening, a first limiting protrusion 33 matched with the first limiting groove 23 is formed in one end, close to the needle head 11, of the cylinder wall of the protecting sleeve 3, namely the first limiting protrusion 33 is formed in the front end of the protecting sleeve 3 and is matched with the first limiting groove 23 in size; the first limiting protrusion 33 is held in the first limiting groove 23 when the protective sheath 3 is located at the retracted position, so as to limit the protective sheath 3 to move in a direction away from the needle 11, i.e. to move towards the rear end of the fixed sheath 2 or even to separate from the fixed sheath 2.

A second limiting groove is formed in one end, close to the needle head 11, of the inner side wall of the fixed sleeve 2, namely the second limiting groove is formed in the front end of the fixed sleeve 2 and is formed by the fact that the inner side wall of the front end is slightly thicker than the inner side wall of the rear end, a groove body structure is formed at the joint of the first limiting groove and the inner side wall, the second limiting groove is formed in the front end of the fixed sleeve 2, the second limiting protrusion is matched with the second limiting groove, is formed in the rear end of the outer cylinder wall of the protective sleeve 3 and is at least one lug matched with the second limiting groove, the inner diameter of the rear end of the fixed sleeve 2 is not smaller than the sum of the outer diameter of the protective sleeve 3 and the diameter of the lug, the protective sleeve 3 can slide at the rear end of the fixed sleeve 2, the inner diameter of the front end of the fixed sleeve 2 is smaller than the sum of the outer diameter of the protective sleeve 3 and the diameter of the lug, and the sliding of the protective sleeve 3 towards the front end of the fixed sleeve 2 is limited and unlimited; the second limiting bulge is clamped in the second limiting groove when the protective sleeve 3 is located at the protection position, so that the protective sleeve 3 is limited to move in the direction of being separated from the fixed sleeve 2, and the protective sleeve 3 is prevented from falling off from the front end of the fixed sleeve 2.

The fixing sleeve 2 has a slot 24 formed on each of two opposite side walls thereof near the needle 11 for allowing two fins of the fin assembly 13 to extend out of the cavity 21 of the fixing sleeve 2, and the size of the slot 24 is the same as that of the cross section of the extending portion of the fin. The slot 24 is axially formed along the fixing sleeve 2, so that the fin assembly 13 can extend out, medical staff can conveniently hold the butterfly needle for operation, and the fixing sleeve 2 fixes the whole needle body 1 in the cavity 21 through fixing the fin assembly 13.

And a needle protecting cover which is sleeved on the needle 11 before use. The needle head protective cover is a cylinder body, the needle head 11 is sleeved on the needle head 11 before the needle head 11 is used, and the front end of the cylinder body exceeds the needle head by 5-10 mm so as to play a role in protection; in use, the needle protecting cover is removed from the needle 11 to facilitate injection.

As an alternative embodiment, as shown in fig. 6 to 9, the first position-limiting part 22 is a groove formed on the inner side wall of the fixing sleeve 2, and the second position-limiting part 32 is a protrusion that is snap-fitted into the groove. The groove is formed by radially extending the inner side wall of the fixed sleeve 2 in the direction far away from the circle center, is square or rectangular, but does not penetrate through the outer side wall of the fixed sleeve 2, and the size of the bulge is suitable for being just clamped into the groove. As shown in fig. 5, the front end of the protrusion is formed with a guiding inclined plane for guiding the protrusion to form a snap fit with the groove when the protective cover 3 moves from the retracted position to the protecting position, that is, the protrusion is wedge-shaped.

The butterfly needle of the invention can also be used as a blood taking needle, a hemodialysis needle or an internal fistula needle to meet various medical requirements.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A safety butterfly needle, comprising:

a fixed sleeve (2) with a cavity (21) inside;

the needle body (1) comprises a needle head (11) and a fin component (13) which are fixedly arranged in the cavity (21) and axially connected, and the needle head (11) extends out of an opening at the front end of the cavity (21);

the protective sleeve (3) is cylindrical and can be movably arranged in the fixed sleeve (2) and sleeved outside the needle body (1), the protective sleeve (3) is provided with a retracting position which does not influence the work of the needle head (11) in a cavity (21) of the fixed sleeve (2) and a protecting position which moves to the front end of the needle head (11), an axial groove (31) is formed in the position, corresponding to the fin component (13), of the wall of the protective sleeve (3), and the axial groove (31) allows the fin component (13) to penetrate through when the protective sleeve (3) moves from the retracting position to the protecting position;

the protective sleeve (3) and the fixed sleeve (2) are in sliding fit through a plane structure arranged at the bottoms of the protective sleeve and the fixed sleeve, the axial groove (31) is positioned above the plane structure, and the area of the plane structure is larger than the projection area of the needle head (11) on the protective sleeve; the side wall of fixed cover (2) is close to the one end shaping of syringe needle (11) has a first spacing portion (22), the section of thick bamboo wall of protective sheath (3) is kept away from the one end shaping of syringe needle (11) has and is used for with protective sheath (3) restriction is in the protection position, with the spacing portion (32) of second that first spacing portion (22) match, first spacing portion (22) be for seting up hole or the shaping on the lateral wall of fixed cover (2) is in the recess on the inside wall of fixed cover (2), spacing portion (32) of second be with hole joint complex arch or with recess joint complex arch, spacing portion (32) of second be equipped with protective sheath (3) by pack up the position to when the protection position removes the arch with the hole, or the arch with recess forms joint complex direction inclined plane.

2. The safety butterfly needle according to claim 1, characterized in that the front end of the axial slot (31) is 5 to 10mm from the front end of the protective sheath (3).

3. Safety butterfly needle according to claim 1, characterized in that said axial slot (31) is open at the rear end.

4. The safety butterfly needle according to claim 1, wherein a first limiting groove (23) is further formed at an end of the side wall of the fixing sleeve (2) close to the needle (11), a first limiting protrusion (33) matching with the first limiting groove (23) is formed at an end of the protective sleeve (3) close to the needle (11), and the first limiting protrusion (33) is clamped in the first limiting groove (23) when the protective sleeve (3) is in the retracted position, so as to limit the movement of the protective sleeve (3) in a direction away from the needle (11).

5. The safety butterfly needle as claimed in claim 4, wherein a second limiting groove is further formed on an inner side wall of the fixed sleeve (2) at an end close to the needle (11), a second limiting protrusion matching with the second limiting groove is formed on the other end of the protective sleeve (3) at the end far from the needle (11), and the second limiting protrusion is retained in the second limiting groove when the protective sleeve (3) is located at the protection position, so as to limit the movement of the protective sleeve (3) in a direction away from the fixed sleeve (2).

6. The safety butterfly needle according to claim 1~5, wherein said hub (2) has a slot (24) formed in each of two opposite side walls thereof near said needle (11) for allowing two wings of said wing assembly (13) to protrude out of said cavity (21) of said hub (2), said slot (24) corresponding to the size of the cross section of the protruding portion of said wings.