CN113730719A

CN113730719A - Sandwich cone

Info

Publication number: CN113730719A
Application number: CN202111172036.4A
Authority: CN
Inventors: 鲁振营
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2021-12-03

Abstract

The invention provides a sandwich cone and relates to the field of medical appliances. A sandwich cone comprises a cone body, wherein the cone body is used for puncturing the skin of a human body and communicating with a blood vessel during infusion, the cone body comprises a cone core and a cone sleeve, and the cone sleeve is slidably sleeved on the cone core; the conical core comprises a conical rod and a puncture head, the conical rod extends out of the conical sleeve, and the puncture head is arranged on the sleeve outer section of the conical rod; the end of the taper sleeve far away from the puncture head is provided with an end head, the end head is covered on the taper sleeve, and the end head is rotationally connected with the taper sleeve. Therefore, the sandwich cone can prevent the formation of needle thrombus during transfusion and reduce the potential vascular crisis.

Description

Sandwich cone

Technical Field

The invention relates to the field of medical appliances, in particular to a sandwich cone.

Background

The ordinary syringe needle infusion syringe needle blood sampling syringe needle that each company of using of each hospital produced all has the sharp sword of bevel connection drum at present, gets into the in-process of blood at the propelling movement syringe needle, has cut skin, subcutaneous soft tissue, vascular wall to bring it into blood, occupy the vascular space.

The cut substances reach the blood vessels and microcirculation capillaries along with the blood flow to form progressive occlusion plugs, and the medicaments cannot be melted. Causing physical pathological conditions in humans and animals that lead to unrecoverable life-long disorders. At present, only the operation can be performed to open the mouth, and the embolus is hooked out by a thin hook, so that the expensive operation cost and the life danger are caused, the health of a living body is seriously influenced, and the life span is shortened. The autologous substances growing together with the blood vessel still need to cut off the blocked section and sew up the blood vessel again, which has high cost and low effect. The blocked part of the microcirculation capillary vessels cannot be operated, and local blood nourishment is lost due to blood obstruction, so that inflammation and even necrosis occur.

In clinical practice, especially when the blood sample is transfused or collected for large and small animals, the needle tube can be blocked when the needle is inserted into blood in a blood vessel, after the needle head is pulled out, the remaining human tissue and blood coagulum in the needle tube can be found, the needle tube needs to be pushed out through an injector, and at the moment, the needle needs to be inserted for the second time, so that the clinical first-aid trouble is caused.

When the blood vessel is directly penetrated through the needle tube, although no serious blockage occurs, part of carried objects are flushed into the blood circulation by the blood flow or adhered to a reserved part, and some of the carried objects are even reserved on a blood vessel valve, so that a far-reaching potential blood vessel crisis is caused, and a place is provided for thrombosis.

According to incomplete statistics in China, the number of injections and transfusions and the number of test examinations of blood samples collected per adult according to the records of the medical treatment course of a hospital are averagely more than 38 times, even more than dozens of times, and the accumulation of adhesive substances brought by autoinjection in blood is increased seriously, which is a very important technical lagging problem endangering life and health.

Disclosure of Invention

The invention aims to provide a sandwich cone which can prevent the formation of a needle thrombus during transfusion and reduce the potential vascular crisis.

The embodiment of the invention is realized by the following steps:

the embodiment of the application provides a sandwich cone which comprises a cone body, wherein the cone body is used for puncturing the skin of a human body and communicating with a blood vessel during infusion, the cone body comprises a cone core and a cone sleeve, and the cone sleeve is slidably sleeved on the cone core; the conical core comprises a conical rod and a puncture head, the conical rod extends out of the conical sleeve, and the puncture head is arranged on the sleeve outer section of the conical rod; the end of the taper sleeve far away from the puncture head is provided with an end head, the end head is covered on the taper sleeve, and the end head is rotationally connected with the taper sleeve.

In some embodiments of the present invention, the puncture head is a conical structure, a conical opening structure is circumferentially disposed at one end of the taper sleeve close to the puncture head, and the slope of the conical opening structure is consistent with the taper of the cone.

In some embodiments of the present invention, the end head includes a corrugated portion, the corrugated portion is funnel-shaped, the corrugated portion is provided with secondary tapered bore chambers in an inclined and symmetrical manner, and the secondary tapered bore chambers include a tapered plug chamber and a tapered core chamber.

In some embodiments of the present invention, the fold portion is provided with a clamp body, the clamp body is of a cylindrical structure, and the clamp body is sleeved on the fold portion.

In some embodiments of the present invention, the clip body includes a first half cylinder and a second half cylinder buckled to the first half cylinder, the second half cylinder is provided with a through hole, and the stopper passes through the through hole.

In some embodiments of the present invention, the folding portion has a binding groove, and a fastening member is disposed in the binding groove.

In some embodiments of the invention, the input end of the taper sleeve is provided with a control valve.

In some embodiments of the present invention, the control valve includes a handle, a connecting rod and a ball valve, two ends of the connecting rod are respectively connected to the ball valve and the handle, the ball valve is located in the taper sleeve and is in clearance fit connection with an inner wall of the taper sleeve, and the handle is located outside the taper sleeve.

In some embodiments of the present invention, the cone sleeve is provided with a fixing band and a wing rake, the fixing band is used for fixing the cone body to the human body, and the wing rake is used for pushing the cone body into the human body.

In some embodiments of the present invention, the input end of the tip is provided with a connector, and the connector is used for communicating with an external infusion tube.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

the embodiment of the application provides a sandwich cone which comprises a cone body, wherein the cone body is used for puncturing the skin of a human body and communicating with a blood vessel during infusion, the cone body comprises a cone core and a cone sleeve, and the cone sleeve is slidably sleeved on the cone core; the conical core comprises a conical rod and a puncture head, the conical rod extends out of the conical sleeve, and the puncture head is arranged on the sleeve outer section of the conical rod; the end of the taper sleeve far away from the puncture head is provided with an end head, the end head is covered on the taper sleeve, and the end head is rotationally connected with the taper sleeve. Above-mentioned awl core is arranged in the human skin of cutting to carry out the pore-creating, is convenient for pierce human blood vessel with whole awl body in, possesses the guide effect. Above-mentioned taper sleeve is used for carrying the liquid medicine, is convenient for carry the required or liquid such as physical examination hemospasia of disease, its performance of very big promotion. The puncture head is used for directly puncturing the skin of a human body, and relieving the pain of a punctured person. The end head is used for controlling the conical core, so that the conical core can be fixed in the conical sleeve, the conical core can be pulled out when the puncture is finished, and the service performance of the conical core is greatly improved by conveying liquid.

Therefore, the sandwich cone can prevent the formation of needle thrombus during transfusion and reduce the potential vascular crisis.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of a taper sleeve structure according to an embodiment of the present invention;

FIG. 3 is a front view of a cone core according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a clip body according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another embodiment of the present invention.

Icon: 1-conical core; 2-taper sleeve; 3-puncture head; 4-a cone-shaped port structure; 5-binding the groove; 6-a fold portion; 7-a stop block; 8-ball valve; 9-a connecting rod; 10-a handle; 11-a connector; 12-a cone core chamber; 13-conical wing harrow bone; 14-a conical plug chamber; 15-a first half cylinder; 16-a second half cylinder; 17-a fixed cavity; 18-switch tie valve; 19-a blood sampling steel head; 20-a plug head; 21-through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" represents at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

Referring to fig. 1-4, fig. 1 is a schematic structural diagram according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a taper sleeve structure according to an embodiment of the present invention; FIG. 3 is a front view of a cone core according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of a clip body according to an embodiment of the present invention.

The embodiment provides a sandwich cone which comprises a cone body, wherein the cone body is used for puncturing the skin of a human body and communicating with a blood vessel during infusion, the cone body comprises a cone core 1 and a cone sleeve 2, and the cone sleeve 2 is slidably sleeved on the cone core 1; the conical core 1 comprises a conical rod and a puncture head 3, the conical rod extends out of the conical sleeve 2, and the puncture head 3 is arranged on the sleeve outer section of the conical rod; the end of the taper sleeve 2 far away from the puncture head 3 is provided with an end head, the end head is covered on the taper sleeve 2, and the end head is rotationally connected with the taper sleeve 2. Above-mentioned awl core 1 is used for cutting human skin and carries out the pore-creating, is convenient for pierce human blood vessel with whole awl body in, possesses the guide effect. Above-mentioned taper sleeve 2 is used for carrying the liquid medicine, is convenient for carry the required or liquid such as physical examination hemospasia of disease, its performance of very big promotion. The puncture head 3 is used for directly puncturing the skin of a human body, and relieving the pain of a punctured person. The end head is used for controlling the conical core 1 to be fixed inside the conical sleeve 2, the conical core 1 can be pulled out when the puncture is completed, and the service performance of the conical core is greatly improved in liquid conveying.

In the embodiment, the taper sleeve 2 and the taper core 1 are both made of stainless steel materials, the stainless steel is short for stainless acid-resistant steel, and the stainless steel is called as weak corrosion medium resistant to air, steam, water and the like or stainless steel grade; and steel grades that are resistant to corrosion by chemically corrosive media (chemical attacks such as acids, bases, salts, etc.) are called acid-resistant steels. The surface of the product is treated by an electroplating process, wherein the electroplating is a process of plating a thin layer of other metals or alloys on the surface of some metals by utilizing an electrolysis principle, and the process is a process of attaching a layer of metal film on the surface of a metal or other material product by utilizing an electrolysis effect so as to play roles of preventing metal oxidation (such as corrosion), improving wear resistance, conductivity, light reflection, corrosion resistance (such as copper sulfate and the like), enhancing the appearance and the like. The anti-corrosion performance of the taper sleeve 2 and the taper core 1 can be greatly improved by adopting an electroplating process, the outer surface of the taper sleeve is smooth, the taper sleeve can conveniently penetrate into a blood vessel of a human body, the friction coefficient is small, and the attractiveness can be greatly improved.

In some embodiments of the present embodiment, the puncture tip 3 is a cone structure, and a taper structure 4 is circumferentially disposed at one end of the taper sleeve 2 close to the puncture tip 3, and the slope of the taper structure 4 is consistent with the taper of the cone. The puncture head 3 is manufactured into a cone structure, the diameter of the original bottom surface of the puncture head is consistent with that of the cone rod, the cone rod and the puncture head 3 are integrally formed, products can be manufactured by adopting a die-casting and 3d printing manufacturing mode, then the products are processed by subsequent processes such as polishing and deburring, and finally the products are sterilized. The manufacturing method adopts an integrated forming manufacturing method, is convenient to manufacture and form, and can greatly improve the precision of the product. Above-mentioned taper sleeve 2 corresponds the cone structure of above-mentioned puncture head 3 and is provided with cone structure 4, and the inclination of above-mentioned cone is unanimous with the inclination of above-mentioned puncture head 3, and the human blood vessel of above-mentioned puncture head 3 introduction of being convenient for to can not produce the drop of angle, promote the device and human laminating degree, make it get into blood vessel inside more smoothly, performance is better, and patient experience degree is good.

In some embodiments of this embodiment, the tip includes a corrugated portion 6, the corrugated portion 6 is funnel-shaped, and the corrugated portion 6 is symmetrically provided with sub-tapered chambers, and the sub-tapered chambers include a tapered plug chamber 14 and a tapered core chamber 12. The corrugated portion 6 is used for taking out the conical core 1 from the conical sleeve 2, and facilitates the liquid transportation by using the conical sleeve 2. Correspond on the above-mentioned fold portion 6 and seted up vice taper hole room, this vice taper hole room plays the effect of spacing effect and storage, can place with awl core 1 the injecing and the awl stopper that carry out the position, very big promotion its performance. Above-mentioned one end of awl core 1 is provided with dog 7, and this dog 7 perpendicular to awl pole preparation forms, can be convenient for its location of fixing the position of awl core 1 and position with its dog 7 with the oral area butt of vice taper hole room to promote the stability when its puncture head 3 inserts the blood vessel, the result of use is splendid.

The end of the conical core chamber 12 is disposed on the plug 20, which is in clearance fit connection with the conical core chamber 12, so as to facilitate disassembly and cleaning.

In this embodiment, the blood sampling steel head 19 is provided in the conical plug chamber 14, and at this time, the conical plug in the conical plug chamber 14 is pulled out, and then the conical plug is closed at one end of the fold portion 6 away from the conical head, so that the blood sampling operation can be performed through the blood sampling steel head 19 during use.

In this example, the plastic is a polymer compound obtained by polymerizing a monomer as a raw material by addition polymerization or polycondensation, and the polymer compound is interposed between a fiber and a rubber in the deformation resistance, and is composed of a synthetic resin, a filler, a plasticizer, a stabilizer, a lubricant, a coloring material, and other additives. Most plastics are light in weight, stable in chemical property and free from corrosion; the impact resistance is good; the transparent and wear-resistant performance is better; the insulativity is good, and the thermal conductivity is low; the corrugated part 6 is generally excellent in moldability and colorability, and low in processing cost, and its excellent physical and chemical properties are ideal materials for the corrugated part, but the plastic material is not limited to the above-mentioned materials, and other materials similar to the physical and chemical properties thereof may be used.

When in use, the conical core 1 can be pulled back into the conical core 1 chamber, thereby ensuring the smooth operation of transfusion; after the transfusion is finished, the conical plug is pushed out from the conical plug chamber 14 to the interior of the conical sleeve 2, so that the conical sleeve 2 is conveniently blocked, and the backflow of blood is avoided.

In some embodiments of the present invention, the fold portion 6 is provided with a clamp body, the clamp body is of a cylindrical structure, and the clamp body is sleeved on the fold portion 6. The clamp body is used for fixing the fold part 6, so that relative displacement is avoided when the clamp body is punctured, secondary damage is carried out on a patient, and medical accidents are avoided. The clamp body is of a cylindrical structure, and is convenient for fixedly clamping the folded part 6, so that the stability of the clamp body is further improved, and the simplicity of operation is further improved.

In some embodiments of the present embodiment, the clip body includes a first half cylinder 15 and a second half cylinder 16 fastened to the first half cylinder 15, the second half cylinder 16 has a through hole 21, and the stopper 7 passes through the through hole 21. A fixing cavity 17 is formed between the first half cylinder 15 and the second half cylinder 16, and the wrinkle part 6 can be fixed in the fixing cavity 17. Above-mentioned half barrel 15 and half barrel 16 of second can be connected and become a complete tube structure, are provided with the connecting piece between half barrel 15 of first and the half barrel 16 of second, rotate its two and connect, be convenient for establish the clamp body cover with fold portion 6 on to be convenient for fix its stability on fold portion 6, promote its stability. The second half cylinder 16 is provided with a through hole 21, the through hole 21 is used for positioning the stop dog 7, the stop dog 7 sequentially passes through the through hole 21, and the stop dog is stably fixed on the taper sleeve 2 through multiple positioning, so that the use performance of the taper sleeve is greatly improved.

In some embodiments of the present invention, the corrugated portion 6 has a binding groove 5, and a fastening member is disposed in the binding groove 5 in the circumferential direction. Binding groove 5 has been seted up on above-mentioned fold portion 6, and it is used for linking up receiving parts binding groove 5, and it is used for binding above-mentioned fold portion 6, is convenient for seal it and forms approximate vacuum environment, avoids the liquid refluence in the taper sleeve 2, causes the pollution of environment. The tightening piece is of a strip-shaped structure, and is circumferentially arranged in the binding groove 5, so that the tightening piece is convenient to fix.

It should be noted that, above-mentioned tightening part is used for preventing that the blood flow from reaching the fixed awl body effect, and it can prop up the skin space, prevents that the summer temperature is high, and its heat is sealed the skin, promotes its air permeability, can also play the effect of fixed awl body.

In the present embodiment, the tightening member is an elastic cord made of natural rubber, which is an elastic solid obtained by subjecting natural latex collected from a brazilian rubber tree to a processing step such as coagulation and drying. The material is generally a flaky solid, has the relative density of 0.94, the refractive index of 1.522 and the elastic modulus of 2-4 MPa, is softened at 130-140 ℃, is sticky and soft at 150-160 ℃, and begins to degrade at 200 ℃. Has high elasticity and slight plasticity at normal temperature and is crystallized and hardened at low temperature. Has better alkali resistance but does not resist strong acid. Is insoluble in water, lower ketones and alcohols, and can swell in nonpolar solvents such as chloroform, carbon tetrachloride, etc. The excellent elasticity is ideal as the material of the fastening piece, but the material is not limited to natural rubber material, and can be physically close to the natural rubber material.

In some embodiments of the present embodiment, the input end of the above-mentioned taper sleeve 2 is provided with a control valve. Above-mentioned control valve is used for controlling the velocity of flow in the taper sleeve 2 to and unblocked and the jam in its taper sleeve 2, can open its control valve when the infusion, the transportation of being convenient for when making its transportation liquid closes this infusion interface after the use is accomplished, avoids the entering of its bacterium, and here spraying antiseptic solution avoids bacterial growing, promotes its result of use.

In some embodiments of the present embodiment, the control valve includes a handle 10, a connecting rod 9 and a ball valve 8, two ends of the connecting rod 9 are respectively connected to the ball valve 8 and the handle 10, the ball valve 8 is located inside the taper sleeve 2 and is in clearance fit connection with an inner wall of the taper sleeve 2, and the handle 10 is located outside the taper sleeve 2. The handle 10 is used for controlling the opening and closing of the taper sleeve 2 and controlling the liquid flow rate in real time. The connecting rod 9 is used for connecting the handle 10 and the ball valve 8, and is convenient to control by the handle 10. The ball valve 8 is a spherical structure, a flow channel is arranged in the center of the ball valve, the maximum flow speed is achieved when the center line of the flow channel is parallel to the center line of the taper sleeve 2, when the center line of the flow channel and the center line of the taper sleeve 2 are sequentially increased, the flow speed is gradually reduced until the flow speed is 0, and the taper sleeve 2 is blocked.

Referring to fig. 5, in other embodiments, the control valve may also be an on-off binding valve 18, and the on-off binding valve 18 may be a binding tape, which has a simple structure, is easily obtained from raw materials, and is convenient to purchase.

In some embodiments of the present embodiment, the taper sleeve 2 is provided with a fixing band (not shown in the drawings) and a wing rake 13, the fixing band is used for fixing the taper body to the human body, and the wing rake 13 is used for pushing the taper body into the human body. Above-mentioned awl wing harrow bone 13 is connected outside taper sleeve 2 through the mode of splicing, and above-mentioned fixed band sets up in above-mentioned taper sleeve 2 outsidely, and it is used for wholly being fixed in human body's body surface with its sandwich awl, avoids external force to squint the syringe needle, makes it cause destruction, very big promotion its performance.

In this embodiment, when above-mentioned awl wing harrow bone 13 is used for promoting taper sleeve 2, convenient to use person held manually to inside being convenient for whole device pushed into human body, stability when promoting the stabbing and the taper sleeve 2's of being convenient for fixed, its performance of very big promotion.

In this embodiment, the fixing band may be a medical adhesive tape, and the base material of the medical adhesive tape packaging product is a pure wood pulp natural material, which is non-toxic and non-irritant, and has good air permeability. The medical packaging adhesive tape has good flexibility, is easy to unwind and is convenient to operate; is suitable for the cross-shaped package of the sterilized cotton cloth bag adopted by medical unit enterprises. Steam under pressure, ethylene oxide, formaldehyde sterilization, and the like. The package for sterilization in hospitals is suitable for central disinfection supply rooms, operating rooms, stomatology departments and the like. The fixing is convenient, the material is not needed to be purchased separately, and the use is convenient.

In other embodiments, above-mentioned fixed band can also be the strip area body, and its circumference sets up in the human position of infusion, pastes the connection through the magic, and it can be according to its elasticity degree of own required adjustment, promotes its comfort performance.

In some embodiments of this embodiment, the input end of the tip is provided with a connector 11, and the connector 11 is used for communicating with an external infusion tube. Above-mentioned connector 11 is the toper funnel structure, and the inner wall of its toper funnel is seted up there is the internal thread, has seted up the external screw thread rather than the transfer line of being connected, connects through screw clearance fit between the two, and it connects inseparabler, can also avoid the bacterium to get into inside this pipeline to the quick connection transfer line of being convenient for promotes its leakproofness.

When the device is used, the conical core 1 is inserted into the conical sleeve 2, then the end head is covered on the conical sleeve 2, the stop dog 7 of the conical core 1 is abutted against the end head, the control valve is closed, then the control valve is connected with an infusion tube, then the infusion tube is inserted into a human blood vessel, the end head is opened, the conical core 1 is rapidly pulled out, then the port is closed, the control valve is opened, and the infusion tube is communicated to the human blood vessel.

In summary, the embodiment of the invention provides a sandwich cone, which comprises a cone body, wherein the cone body is used for puncturing the skin of a human body and communicating with a blood vessel during infusion, the cone body comprises a cone core 1 and a cone sleeve 2, and the cone sleeve 2 is slidably sleeved on the cone core 1; the conical core 1 comprises a conical rod and a puncture head 3, the conical rod extends out of the conical sleeve 2, and the puncture head 3 is arranged on the sleeve outer section of the conical rod; the end of the taper sleeve 2 far away from the puncture head 3 is provided with an end head, the end head is covered on the taper sleeve 2, and the end head is rotationally connected with the taper sleeve 2. Above-mentioned awl core 1 is used for cutting human skin and carries out the pore-creating, is convenient for pierce human blood vessel with whole awl body in, possesses the guide effect. Above-mentioned taper sleeve 2 is used for carrying the liquid medicine, is convenient for carry the required or liquid such as physical examination hemospasia of disease, its performance of very big promotion. The puncture head 3 is used for directly puncturing the skin of a human body, and relieving the pain of a punctured person. The end head is used for controlling the conical core 1 to be fixed inside the conical sleeve 2, the conical core 1 can be pulled out when the puncture is completed, and the service performance of the conical core is greatly improved in liquid conveying. Therefore, the sandwich cone can prevent the formation of needle thrombus during transfusion and reduce the potential vascular crisis.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sandwich cone is characterized by comprising a cone body, wherein the cone body is used for puncturing the skin of a human body and communicating with a blood vessel during infusion, the cone body comprises a cone core and a cone sleeve, and the cone sleeve is slidably sleeved on the cone core;

the conical core comprises a conical rod and a puncture head, the conical rod extends out of the conical sleeve, and the puncture head is arranged on the sleeve outer section of the conical rod;

the one end of keeping away from on the taper sleeve the puncture head is provided with the end, the end hood is located on the taper sleeve, the end with the taper sleeve rotates to be connected.

2. The sandwich cone of claim 1, wherein the piercing head is of a cone structure, a tapered mouth structure is circumferentially arranged at one end of the cone sleeve close to the piercing head, and the slope of the tapered mouth structure is consistent with the taper of the cone.

3. The sandwich cone of claim 1, wherein the tip comprises a corrugated portion, the corrugated portion is funnel-shaped, and the corrugated portion is provided with secondary cone-hole chambers in an inclined and symmetrical manner, and the secondary cone-hole chambers comprise a cone plug chamber and a cone core chamber.

4. The sandwich cone of claim 3, wherein the corrugated portion is provided with a clamp body, the clamp body is of a cylindrical structure, and the clamp body is sleeved on the corrugated portion.

5. The sandwich cone of claim 4, wherein the clip body comprises a first half cylinder and a second half cylinder fastened to the first half cylinder, a fixing cavity is defined between the first half cylinder and the second half cylinder, and the corrugated portion can extend into the fixing cavity.

6. The sandwich cone of claim 4, wherein the corrugated portion defines a binding slot, and a tightening member is disposed in the binding slot.

7. The sandwich cone of claim 1, wherein the input end of the cone sleeve is provided with a control valve.

8. The sandwich cone of claim 7, wherein the control valve comprises a handle, a connecting rod and a ball valve, the ball valve and the handle are respectively connected to two ends of the connecting rod, the ball valve is located in the cone sleeve and is in clearance fit connection with the inner wall of the cone sleeve, and the handle is located outside the cone sleeve.

9. The sandwich cone according to claim 1, wherein a fixing band and a wing rake bone are arranged on the cone sleeve, the fixing band is used for fixing the cone body to a human body, and the wing rake bone is used for pushing the cone body into the human body.

10. The sandwich cone of claim 1, wherein the input end of the tip is provided with a connector for communicating with an external infusion tube.