CN107596510B

CN107596510B - Medical safe self-destruction syringe

Info

Publication number: CN107596510B
Application number: CN201710847189.1A
Authority: CN
Inventors: 张艳霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-09-19
Filing date: 2017-09-19
Publication date: 2020-09-08
Anticipated expiration: 2037-09-19
Also published as: CN107596510A

Abstract

The invention discloses a medical safe self-destruction syringe, which comprises a syringe barrel, a needle assembly sleeved at the liquid outlet end of the syringe barrel, and a pull rod assembly inserted in the syringe barrel in a sliding manner, wherein the syringe barrel, the needle assembly sleeved at the liquid outlet end of the syringe barrel, and the pull rod assembly inserted in the syringe barrel in a sliding manner comprise an upper rod body, a lower rod body and a piston which are sequentially arranged from top to bottom; the invention has the advantages of few components, low manufacturing cost, simple operation self-destruction step and convenient disassembly and recycling of the metal needle thin tube.

Description

Medical safe self-destruction syringe

Technical Field

The invention relates to the technical field of medical injection tools, in particular to a medical safe self-destruction injector.

Background

Syringes are a common medical device. As early as the 15 th century, kathler, italian, proposed the principle of the syringe. Gas or liquid is primarily drawn or injected with a needle. Syringes may also be used for injection through rubber septa in medical devices, containers, scientific instruments such as in some chromatography.

The current safety syringe mainly has the following design scheme:

1. after the nurse finishes using the syringe, the needle head is pulled into the syringe barrel, and the push rod of the syringe is broken off or blocked in the syringe barrel.

The problems are as follows: because the problem of structure leads to the unable accurate control of liquid volume in the syringe, requires medical staff to break the syringe push rod by hand simultaneously, if improper operation, the syringe needle in the needle tubing can be pulled out to the needle tubing outside, and then causes the risk of being punctured the infection with the operator, and the structure is complicated moreover, and manufacturing cost is high, as disposable syringe, hardly promotes.

2. The sleeve is arranged outside the injector, after the injector is used, the whole injector comprises a needle which retracts into the sleeve to prevent the needle from hurting people, and meanwhile, all accessories of the injector are locked or blocked to realize the function of the medical safe self-destruction injector.

The problems are as follows: the syringe increases the sleeve outward, and the cylinder scale mark is sheltered from, is unfavorable for the operator to read the liquid medicine volume accurately, and the design of part interlocking destruction simultaneously produces the vibration easily in the use, causes the injection liquid medicine volume inhomogeneous, brings extra misery for the patient.

3. On the basis of the existing disposable syringe, the front end of the push rod is provided with the ejector rod, and after injection is finished, the ejector rod ejects the needle head, so that medical staff are prevented from being punctured.

The problem is that the syringe body is not damaged, can be recycled and can bring opportunities for lawbreakers.

4. On the basis of the existing disposable syringe, a protective cover or a sheath, a needle cap, a sleeve and the like aiming at the needle are added near the needle, and accessories are used for covering the needle after the injection is finished.

Therefore, there is an urgent need for a safe self-destructive injector for medical use, which has few components, low manufacturing cost, simple self-destructive operation steps, stable and reliable structural design, reduced possibility of puncture or puncture injury to medical care personnel and patients after the injector is used, and convenient recovery of the needle.

Disclosure of Invention

The invention aims to provide a medical safe self-destruction syringe to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a medical safe self-destruction syringe comprises a syringe barrel, a needle head assembly sleeved at a liquid outlet end of the syringe barrel and a pull rod assembly inserted in the syringe barrel in a sliding manner, wherein the pull rod assembly comprises an upper rod body, a lower rod body and a piston which are sequentially arranged from top to bottom; a plurality of bending plates are distributed around the bottom end of the inner rod body, the upper end of the inner side of each bending plate is connected with the bottom end of the inner rod body through a first hinge, the lower end of the inner side of each bending plate is in contact with the top surface of the lower rod body, the upper end of the outer side of each bending plate is fixedly bonded with the bottom surface of the upper rod body, and the lower end of the outer side of each bending plate is connected with the top surface of the lower rod body through; the bottom end of the lower rod body is sleeved with a piston, and the piston is inserted into the syringe barrel; the needle head assembly comprises a needle cap and a needle head thin tube, the needle head thin tube is fixedly inserted at the bottom end of the needle cap, and the top end of the needle cap is sleeved at the liquid outlet end of the syringe barrel.

As a further scheme of the invention: and a rod wing plate extends from the side wall of the top end of the upper rod body.

As a further scheme of the invention: and a barrel wing plate extends from the side wall of the top end of the syringe barrel.

As a further scheme of the invention: the syringe needle tubule top lateral wall distributes all around and is provided with the multiunit pawl, and every group pawl includes at least two pawls that distribute along syringe needle tubule length direction, a plurality of pawl slots that correspond the cartridge with every group pawl are seted up all around to needle cap bottom hole inner wall, and the pawl slot inner wall is last to be fixed be provided with the pawl one-to-one cooperation ratchet piece that clamps.

As a further scheme of the invention: the pointed end of the pawl is arranged in an upward inclined mode from inside to outside, and the pointed end of the ratchet block is arranged in a downward inclined mode from outside to inside.

As a further scheme of the invention: the outer wall of the top end of the needle thin tube is hermetically sealed and provided with a sealing ring, and the circumferential outer wall of the sealing ring is hermetically connected with the inner wall of the inner hole of the needle cap.

As a further scheme of the invention: the needle cap comprises a cylindrical cap at the upper end and a conical cap at the lower end, and a transition step groove is formed in the outer wall of the joint of the cylindrical cap and the conical cap.

As a further scheme of the invention: the needle head tubule and each pawl are all set up by metal material integrated into one piece.

As a further scheme of the invention: the cylinder cap and the cone cap are both integrally formed by environment-friendly plastics.

Compared with the prior art, the invention has the beneficial effects that:

1) according to the invention, the needle head thin tube and the needle cap are in a separable structural design, so that the needle head thin tube at the metal part can be conveniently recycled, the needle head thin tube and the needle cap are connected in a clamping manner by adopting the pawl and the ratchet block, the needle head thin tube cannot be pushed into the needle cap, but can be pulled out by using a tool, and the problem that the needle head thin tube is pushed into the needle cap when in use is not worried;

2) the self-destruction syringe has the advantages that the self-destruction function is added, the structure is simple, the normal use is not influenced, after the syringe is used, the hand pull ring is pulled outwards, the syringe can be destroyed, the syringe is prevented from being recovered by lawbreakers to be recycled, and the self-destruction operation is convenient;

3) the injector of the invention has less integral parts, can effectively reduce the production cost and is suitable for popularization and use.

In conclusion, the invention has the advantages of few components, low manufacturing cost, simple operation self-destruction step, stable and reliable structural design and convenient disassembly and recycling of the metal needle thin tube.

Drawings

FIG. 1 is a three-dimensional schematic view of a medical safety self-destruction syringe;

FIG. 2 is a sectional view of a medical safety self-destruction syringe;

FIG. 3 is a perspective view of a pull rod assembly of the medical safety self-destruction syringe;

FIG. 4 is a sectional view of the pull rod assembly of the medical safety self-destruction syringe;

FIG. 5 is a schematic perspective view of the connection between the inner rod and the bending plate of the safe self-destructive syringe;

FIG. 6 is a schematic cross-sectional view of the connection between the inner rod and the bending plate of the safe self-destruction syringe;

FIG. 7 is a perspective view of the needle assembly of the medical safety self-destruction syringe;

FIG. 8 is a sectional view of the needle assembly of the medical safety self-destruction syringe;

FIG. 9 is a schematic structural view of the section A-A in FIG. 8 illustrating a medical safety self-destruction syringe;

fig. 10 is a schematic structural view of a needle tubule in a medical safety self-destruction syringe.

In the figure: 1-pull rod assembly, 11-lower rod body, 12-upper rod body, 121-rod body wing plate, 122-rod cap sunken groove, 13-piston, 14-inner rod body, 141-inner rod cap, 142-pull ring groove, 143-pull ring, 15-bent plate, 16-first hinge, 17-second hinge, 2-syringe barrel, 21-barrel wing plate, 3-needle assembly, 31-needle thin tube, 32-cone cap, 33-cylinder cap, 34-transition step groove, 35-sealing ring, 36-ratchet block, 37-pawl and 38-pawl slot.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1-2, the present invention provides a technical solution: a medical safe self-destruction syringe comprises a syringe barrel 2, a needle assembly 3 sleeved at the liquid outlet end of the syringe barrel 2 and a pull rod assembly 1 inserted in the syringe barrel 2 in a sliding manner;

referring to fig. 3 to 6, the pull rod assembly 1 includes an upper rod body 12, a lower rod body 11 and a piston 13 sequentially arranged from top to bottom, and a rod body wing plate 121 is extended from a side wall of a top end of the upper rod body 12; the side wall of the top end of the syringe barrel 2 is provided with a barrel wing plate 21 in an extending way, so that medical personnel can conveniently carry out injection operation;

a hollow rod cavity is arranged in the upper rod body 12 in a penetrating manner, an inner rod body 14 is inserted into the hollow rod cavity, an inner rod cap 141 is arranged at the top end of the inner rod body 14, a rod cap sinking groove 122 matched with the inner rod cap 141 is formed in the top surface of the upper rod body 12, a pull ring groove 142 is formed in the top surface of the inner rod cap 141, and a pull ring 143 which can be folded and placed in the pull ring groove 142 is hinged in the pull ring groove 142; a plurality of bending plates 15 are distributed around the bottom end of the inner rod body 14, the upper end of the inner side of each bending plate 15 is connected with the bottom end of the inner rod body 14 through a first hinge 16, the lower end of the inner side of each bending plate 15 is in contact with the top surface of the lower rod body 11, the upper end of the outer side of each bending plate 15 is fixedly bonded with the bottom surface of the upper rod body 12, and the lower end of the outer side of each bending plate 15 is connected with the top surface of the lower rod body 11 through a; the bottom end of the lower rod body 11 is sleeved with a piston 13, and the piston 13 is inserted into the syringe barrel 2.

Referring to fig. 7, the needle assembly 3 includes a needle cap and a needle tubule 31, the needle cap includes an upper cylindrical cap 33 and a lower conical cap 32, and the cylindrical cap 33 and the conical cap 32 are formed integrally by environmental protection plastic; a transition step groove 34 is formed in the outer wall of the joint of the cylindrical cap 33 and the conical cap 32, so that the needle cap and the liquid outlet end of the syringe barrel 2 can be conveniently sleeved and detached; the needle thin tube 31 is fixedly inserted at the bottom end of the conical cylinder cap 32, and the top end of the cylindrical cap 33 is sleeved at the liquid outlet end of the syringe cylinder 2.

Referring to fig. 8 to 10, a plurality of groups of pawls 37 are distributed around the sidewall of the top of the needle tubule 31, and the needle tubule 31 and each pawl 37 are formed integrally by a metal material; each group of pawls 37 comprises at least two pawls 37 distributed along the length direction of the needle tubule 31, a plurality of pawl slots 38 correspondingly inserted with each group of pawls 37 are formed around the inner wall of an inner hole at the bottom end of the needle cap, and ratchet blocks 36 correspondingly matched and clamped with the pawls 37 one to one are fixedly arranged on the inner wall of each pawl slot 38; the tip of the pawl 37 is inclined upward from inside to outside, and the tip of the ratchet block 36 is inclined downward from outside to inside.

The outer wall of the top end of the needle thin tube 31 is provided with a sealing ring 35 in a sealing and sealing way, and the circumferential outer wall of the sealing ring 35 is connected with the inner wall of the inner hole of the needle cap in a sealing way. The seal ring 35 can provide a good sealing effect.

The working principle of the invention is as follows: in the pull rod assembly, the upper end of the outer side of the bending plate 15 and the bottom surface of the upper rod body 14 adopt an adhesive structure, and the connecting structure can bear tension and pressure but cannot bear shearing force, so that the structure is stable and reliable, and the drawing use of a normal syringe can be met; when the injector is self-destructed, a worker pulls the hand-pulling ring 143 on the top of the inner pull rod 14 upwards, the inner pull rod 14 moves upwards, so that the bending plate 15 is driven to rotate around the second hinge 17, the bonding part is broken by shearing force, the pull rod device is damaged, the whole injector cannot be used for the second time, and the self-destruction operation step is simple; the needle thin tube 31 and the needle cap are clamped by matching the pawl 37 and the ratchet block 36, the needle thin tube 31 cannot be ejected upwards, and cannot be pulled downwards in a conventional use state, but the needle thin tube 31 can be pulled downwards by a special clamp, so that the needle thin tube 31 and the needle cap can be separated conveniently, and the needle thin tube 31 can be recycled independently; a plurality of pawl slots 38 which are correspondingly inserted with each group of pawls 37 are formed in the periphery of the inner wall of an inner hole at the bottom end of the needle cap, the pawl slots 38 can limit the needle thin tube 31 to prevent the needle thin tube 31 from rotating, and the structural connection is reliable and stable; the whole parts of the injector are less, so that the production cost can be effectively reduced, and the injector is suitable for popularization and use.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a medical safe self-destruction syringe, includes syringe barrel (2), suit and needle subassembly (3) and slip cartridge pull rod subassembly (1) inside syringe barrel (2) of liquid end are gone out to syringe barrel (2), its characterized in that: the pull rod assembly (1) comprises an upper rod body (12), a lower rod body (11) and a piston (13) which are sequentially arranged from top to bottom, a hollow rod cavity is arranged in the upper rod body (12) in a penetrating mode, an inner rod body (14) is inserted into the hollow rod cavity, an inner rod cap (141) is arranged at the top end of the inner rod body (14), a rod cap sink groove (122) matched with the inner rod cap (141) is formed in the top surface of the upper rod body (12), a pull ring groove (142) is formed in the top surface of the inner rod cap (141), and a pull ring (143) which can be placed in the pull ring groove (142) in a folding mode is hinged in the pull ring groove (142); a plurality of bending plates (15) are distributed around the bottom end of the inner rod body (14), the upper end of the inner side of each bending plate (15) is connected with the bottom end of the inner rod body (14) through a first hinge (16), the lower end of the inner side of each bending plate (15) is in contact with the top surface of the lower rod body (11), the upper end of the outer side of each bending plate (15) is fixedly bonded with the bottom surface of the upper rod body (12), and the lower end of the outer side of each bending plate (15) is connected with the top surface of the lower rod body (11) through a second hinge (17); the bottom end of the lower rod body (11) is sleeved with a piston (13), and the piston (13) is inserted into the syringe cylinder body (2); the syringe needle subassembly (3) includes needle cap and syringe needle tubule (31), the fixed cartridge of syringe needle tubule (31) is in the needle cap bottom, and needle cap top suit is in syringe barrel (2) play liquid end.

2. The medical safety self-destruction syringe as claimed in claim 1, wherein: and a rod body wing plate (121) extends from the side wall of the top end of the upper rod body (12).

3. The medical safety self-destruction syringe as claimed in claim 1, wherein: and a barrel wing plate (21) extends from the side wall of the top end of the syringe barrel (2).

4. The medical safety self-destruction syringe as claimed in claim 1, wherein: the utility model discloses a syringe needle tubule (31) top lateral wall distributes all around and is provided with multiunit pawl (37), and every group pawl (37) include at least two pawl (37) along syringe needle tubule (31) length direction distribution, a plurality ofly set up pawl slot (38) that correspond cartridge with every group pawl (37) all around in the needle cap bottom hole inner wall, fixed ratchet piece (36) that are provided with and clamp with pawl (37) one-to-one cooperation on pawl slot (38) inner wall.

5. The medical safety self-destruction syringe as claimed in claim 4, wherein: the pointed end of the pawl (37) is arranged in an upward inclined mode from inside to outside, and the pointed end of the ratchet block (36) is arranged in a downward inclined mode from outside to inside.

6. The medical safety self-destruction syringe as claimed in claim 4, wherein: and a sealing ring (35) is hermetically arranged on the outer wall of the top end of the needle thin tube (31), and the circumferential outer wall of the sealing ring (35) is hermetically connected with the inner wall of the inner hole of the needle cap.

7. The medical safety self-destruction syringe as claimed in claim 4, wherein: the needle cap comprises a cylindrical cap (33) at the upper end and a conical cap (32) at the lower end, and a transition step groove (34) is formed in the outer wall of the joint of the cylindrical cap (33) and the conical cap (32).

8. The medical safety self-destruction syringe as claimed in claim 4, wherein: the needle thin tube (31) and each pawl (37) are formed by metal materials in an integrated mode.

9. The medical safety self-destruction syringe as claimed in claim 7, wherein: the cylindrical cap (33) and the conical cap (32) are both integrally formed by environment-friendly plastics.