Flat disposable implantable drug delivery special needle

Abstract

The utility model discloses a flat disposable implantable dosing special needle which comprises a needle base and a needle head, the needle base is provided with a first needle head through hole matched with the needle head, the needle head can be movably connected to the needle base in the axial direction of the needle head, a shielding piece is movably connected into the needle base, and the shielding piece is provided with a second needle head through hole matched with the first needle head through hole. A second needle head through hole matched with the needle head is formed in the shielding piece, and the elastic piece is used for controlling the shielding piece to move so as to enable the first needle head through hole and the second needle head through hole to be mutually staggered. The utility model aims to solve the technical problems existing in the prior art, and provides a flat disposable implantable drug delivery special needle which can limit a puncture needle head in a limited space through a simpler and more flat self-locking closed structure, so that the needle head is prevented from puncturing medical staff, and the safety of the medical staff is improved. Meanwhile, the overall thickness of the instrument is greatly reduced, and the use comfort is better.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a flat disposable implantable drug delivery needle. Background Art

[0002] The non-injury needle is a special needle for drug administration and infusion used with an implantable central venous infusion port. After the drug administration is completed, the medical staff needs to pull out the non-injury needle. In the traditional needle removal process, the medical staff needs to fix the infusion port base with one hand and pull out the non-injury needle with the other hand. Since the non-injury needle tube will produce a certain recoil force when it is separated from the infusion port, it may cause stabbing to the medical staff and affect their normal work. And when the non-injury needle is pulled out, it is easy to bring out some liquid medicine and body fluids, causing secondary infection and leading to safety hazards.

[0003] The specialized needles commonly used on the market are complex in structure, high in cost, and require manual force to complete the final fixation or blockage of the needle's active channel.

[0004] The implantation of the infusion port causes the skin to bulge, and the safety-type special needle itself has a certain thickness. The combination of the two results in an obvious bulge in the patient's area, increasing the chance of touch and the risk of needle drop. Currently, there is a lack of low-thickness, comfortable and safety-type special needles on the market. Utility Model Content

[0005] 1. Technical problems to be solved by the utility model

[0006] The utility model aims to solve the technical problems existing in the prior art and to provide a flat disposable implantable drug delivery needle, which can confine the puncture needle to a limited space through a simpler self-locking closed structure to prevent the needle from injuring medical staff. At the same time, the extremely low thickness reduces the risk of needle dropping and increases the comfort of patient use.

[0007] 2. Technical solution

[0008] In order to solve the above problems, the technical solution provided by the utility model is:

[0009] A flat disposable implantable needle for drug delivery comprises a needle seat and a needle, wherein the needle seat is provided with a first needle through hole matched with the needle, the needle can be movably connected to the needle seat along its own axial direction, a shielding plate is movably connected inside the needle seat, the shielding plate is provided with a second needle through hole matched with the needle, and also comprises an elastic member for controlling the movement of the shielding plate so that the first needle through hole and the second needle through hole are misaligned with each other.

[0010] Optionally, the needle is connected to the needle seat via a sleeve, the sleeve is movably and anti-detachably connected to the needle seat, and the needle is movably and anti-detachably connected to the sleeve.

[0011] Optionally, the sleeve is a stacked inner and outer sleeve structure, including an outer sleeve and an inner sleeve, the inner sleeve is movably and anti-detachably connected inside the outer sleeve, and the needle is movably and anti-detachably connected to the inner sleeve.

[0012] Optionally, the shielding sheet is a metal sheet.

[0013] Optionally, the elastic member is a nickel-titanium wire, and is arranged on the same horizontal plane as the shielding sheet.

[0014] Optionally, the needle seat is made of transparent material, and a mark is provided inside the needle seat. When the first needle through hole and the second needle through hole overlap, the mark is blocked by the shielding sheet, and when the first needle through hole and the second needle through hole are misaligned, the mark is exposed from the shielding sheet.

[0015] Optionally, the identification is a color identification.

[0016] Optionally, the needle seat includes a base and a bottom cover which are combined and connected together, the needle head is movably connected to the bottom cover, and the shielding sheet and the elastic member are arranged between the base and the bottom cover.

[0017] Optionally, a circle of foam is provided on the end surface of the base facing away from the bottom cover, and the foam is arranged around the first needle through hole.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0020] After the infusion is completed, the flat disposable implantable drug delivery needle is pulled out of the skin and then retracted into the needle seat and separated from the shielding sheet. At this time, the elastic member, based on its own elasticity, prompts the shielding sheet to reset so that the first needle through hole and the second needle through hole are misaligned with each other. In this state, the tip of the needle is blocked by the shielding sheet, and the puncture needle is confined to a limited space through a simpler self-locking closed structure. The above-mentioned flat closed structure can greatly reduce the thickness of the safety-type special needle, which is closer to the skin during use, reduces the risk of needle drop, reduces the probability of patient touch, and increases comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a flat disposable implantable drug delivery needle proposed in an embodiment of the utility model;

[0022] Figure 2 A schematic cross-sectional view of a flat disposable implantable drug delivery needle in an initial state provided in an embodiment of the utility model;

[0023] Figure 3 A cross-sectional schematic diagram of a flat disposable implantable drug delivery needle in a released state proposed in an embodiment of the utility model;

[0024] 1. Needle seat; 1a. First needle through hole; 11. Base; 12. Bottom cover; 2. Needle; 3. Shielding sheet; 3a. Second needle through hole; 4. Elastic member; 5. Sleeve; 51. Outer sleeve; 52. Inner sleeve; 6. Label; 7. Foam. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and do not limit the protection scope of the utility model.

[0026] It should be noted that when an element is referred to as being "fixed to", "disposed on", "fixed on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. Further, when an element is considered to be "fixedly connected to" another element, the two may be fixed in a detachable connection manner or in a non-detachable connection manner, such as socketing, snap-on, one-piece fixation, welding, etc., which can be achieved in the prior art and will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] The “first” and “second” involved in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0029] Combined with Figure 1-3 , a flat disposable implantable drug-delivery needle of the present embodiment comprises a needle seat 1 and a needle 2, wherein the needle seat 1 is provided with a first needle through hole 1a adapted to the needle 2, the tip of the needle 2 extends out from the first needle through hole 1a, the needle 2 can be movably connected to the needle seat 1 along its own axial direction, the tip of the needle 2 can be retracted into the needle seat 1, a shielding plate 3 is movably connected inside the needle seat 1, the shielding plate 3 moves inside the needle seat 1 along the axial direction perpendicular to the needle 2, a second needle through hole 3a adapted to the needle 2 is provided on the shielding plate 3, and an elastic member 4 is further included for controlling the movement of the shielding plate 3 so that the first needle through hole 1a and the second needle through hole 3a are displaced from each other.

[0030] After the infusion is completed, the needle 2 of the flat disposable implantable drug delivery needle is pulled out to the skin and then retracted into the needle seat 1 and separated from the shielding plate 3. At this time, the elastic member 4, based on its own elasticity, prompts the shielding plate 3 to reset so that the first needle hole 1a and the second needle hole 3a are misaligned with each other. In this state, the tip of the needle 2 is blocked by the shielding plate 3, and the puncture needle is confined to a limited space through a simpler self-locking closed structure.

[0031] As an optional solution of the present utility model, the needle 2 is connected to the needle seat 1 through a sleeve 5, the needle 2 and the sleeve 5 are coaxially arranged, the sleeve 5 is axially movably connected to the needle seat 1, the upper end of the sleeve 5 is provided with a needle movable opening adapted to the needle 1, the caliber of the needle movable opening is adapted to the diameter of the needle 2, and when it abuts against the raised portion of the needle 2, the needle 2 is prevented from falling out of the sleeve 5, the lower end of the sleeve 5 is provided with a limiting edge which cooperates with the needle seat 1 to prevent falling off, the outer diameter of the limiting edge is larger than the outer diameter of the sleeve 5, and the needle seat 1 is provided with a sleeve movable opening adapted to the sleeve 5.

[0032] The needle 2 is movably and anti-detachment connected to the sleeve 5, and the sleeve 5 is fixedly connected to the needle seat 1, which facilitates the installation and fixation of the needle 2 and prevents the needle from being pulled out of the needle seat 1.

[0033] As an optional solution of the present invention, the shielding sheet 3 is a metal sheet, and the possibility of the shielding sheet 3 being punctured by the needle 2 is zero, which completely eliminates the possibility of the needle puncturing medical staff.

[0034] As an optional solution of the present invention, the elastic member 4 is a nickel-titanium wire and is arranged on the same horizontal plane as the shielding piece 3. The high elasticity of the nickel-titanium wire can ensure the rapid resetting of the shielding piece 3. When the first needle through hole 1a and the second needle through hole 3a coincide with each other, the nickel-titanium wire is in a bent state. The diameter of the nickel-titanium wire is consistent with the thickness of the shielding piece 3, and the middle part is bent into an arc as an elastic structure. Through this structural design, the height space occupied by the shielding piece 3 and the elastic member 4 is small, so that the overall thickness of the needle seat 1 is thinner, and it is not easy to collide and fall off during actual use.

[0035] As an optional structure of the present invention, the sleeve 5 is a stacked inner and outer sleeve structure, including an outer sleeve 51 and an inner sleeve 52. The inner sleeve 52 is movably and anti-detachably connected to the outer sleeve 51. The needle 2 is movably and anti-detachably connected to the inner sleeve 52. The outer sleeve 51 and the inner sleeve 52 have the same structure but different sizes. The outer sleeve 51 is provided with an inner sleeve movable opening adapted to the inner sleeve 52. By designing the sleeve 5 into the outer sleeve 51 and the inner sleeve 52, the height of the sleeve 5 can be kept the same as before, thereby further reducing the thickness of the needle seat 1.

[0036] As an optional solution of the present invention, in order to facilitate medical staff to observe the status of the needle 2, the needle seat 1 is made of transparent material, and a mark 6 is provided in the needle seat 1. Medical staff can observe the mark in the needle seat 1 with the naked eye. When the first needle through hole 1a and the second needle through hole 3a coincide with each other, the mark 6 is blocked by the shielding sheet 3. When the first needle through hole 1a and the second needle through hole 3a are misaligned, the mark 6 is exposed from the shielding sheet 3. Specifically, in order to improve the recognition of the mark 6 in different states, the mark 6 is a color mark, preferably a more conspicuous color such as red or green.

[0037] As an optional solution of the present invention, the needle seat 1 includes a base 11 and a bottom cover 12 which are combined and connected together. The base 11 and the bottom cover 12 are split structures and are fixed together by gluing or snapping. The needle head 2 is movably connected to the bottom cover 12, and the shielding sheet 3 and the elastic member 4 are arranged between the base 11 and the bottom cover 12. The above structure is mainly to facilitate the assembly of the shielding sheet 3 and the elastic member 4 located inside the needle seat 1, and the structure is simple and easy to manufacture.

[0038] As an optional solution of the present invention, a circle of foam 7 is provided on the end surface of the base 11 away from the bottom cover 12, and the foam 7 is arranged around the first needle through hole to improve the comfort of the base 11 when it contacts the patient's skin.

[0039] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A flat disposable implantable drug delivery needle, characterized in that: It includes a needle seat and a needle, the needle seat is provided with a first needle through hole adapted to the needle, the needle can be movably connected to the needle seat along its own axial direction, a shielding plate is movably connected inside the needle seat, the shielding plate is provided with a second needle through hole adapted to the needle, and also includes an elastic member for controlling the movement of the shielding plate so that the first needle through hole and the second needle through hole are misaligned with each other.

2. A flat disposable implantable drug delivery needle according to claim 1, characterized in that: The needle is connected to the needle seat through a sleeve, the sleeve is movably and anti-detachably connected to the needle seat, and the needle is movably and anti-detachably connected to the sleeve.

3. A flat disposable implantable drug delivery needle according to claim 2, characterized in that: The sleeve is a superimposed inner and outer sleeve structure, comprising an outer sleeve and an inner sleeve, the inner sleeve is movably and anti-detachably connected inside the outer sleeve, and the needle is movably and anti-detachably connected to the inner sleeve.

4. A flat disposable implantable drug delivery needle according to claim 1, characterized in that: The shielding sheet is a metal sheet.

5. A flat disposable implantable drug delivery needle according to claim 1, characterized in that: The elastic member is a nickel-titanium wire and is arranged on the same horizontal plane as the shielding sheet.

6. A flat disposable implantable drug delivery needle according to any one of claims 1 to 5, characterized in that: The needle seat is made of transparent material and is provided with a mark inside the needle seat. When the first needle through hole and the second needle through hole overlap, the mark is blocked by the shielding sheet. When the first needle through hole and the second needle through hole are misaligned, the mark is exposed from the shielding sheet.

7. A flat disposable implantable drug delivery needle according to claim 6, characterized in that: The identification is a color identification.

8. A flat disposable implantable drug delivery needle according to any one of claims 1 to 5, characterized in that: The needle seat comprises a base and a bottom cover which are combined and connected together, the needle head is movably connected to the bottom cover, and the shielding sheet and the elastic member are arranged between the base and the bottom cover.

9. A flat disposable implantable drug delivery needle according to claim 8, characterized in that: A circle of foam is arranged on the end surface of the base facing away from the bottom cover, and the foam is arranged around the first needle through hole.

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