CN111729153A

CN111729153A - Novel combined type safe self-destruction syringe

Info

Publication number: CN111729153A
Application number: CN201911295409.XA
Authority: CN
Inventors: 黄旭荣; 黄海川
Original assignee: Guangdong Hongshan Medical Device Technology Co ltd
Current assignee: Guangdong Hongshan Medical Device Technology Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-10-02

Abstract

The invention discloses a novel composite type safe self-destruction injector which comprises an injection tube, an injection rod, a sealing ring and a needle seat, wherein the injection tube comprises a standard wide section and a widened wide section, the width of the inner wall of the widened wide section is larger than that of the standard wide section, the widened wide section is positioned at the top of the injection tube, a fixing groove with a fixing effect is arranged on the standard wide section close to the widened wide section, the injection rod is movably connected in the injection tube, the bottom of the injection rod is in closed fit with the inner wall of the injection tube, a cavity is arranged in the injection rod, and a spring sleeve capable of moving upwards relative to the injection rod is arranged below the cavity. The invention has the following advantages: the fixed groove is arranged, the fixed groove can be matched with the convex rib on the sealing ring to achieve a good fixing effect, the injection rod adopts two designs with different widths, the sealing ring and the sealing rubber can not easily rebound, the exhaust holes can play a role in saving labor and conveniently retracting the needle head, and the stability of the spring sleeve can be better guaranteed by the clamping block.

Description

Novel combined type safe self-destruction syringe

Technical Field

The invention relates to the technical field of syringes, in particular to a novel combined type safe self-destruction syringe.

Background

With the wide application of the syringes, in order to avoid cross infection of medical patients, more and more self-destruction syringes are available on the market, the self-destruction syringes are disposable syringe products which can be used repeatedly, the self-destruction syringes are various in types, and after injection is finished, a push rod cannot be pulled out of a syringe by means of manual or mechanical force, so that self-locking is achieved, or the sealing performance of a piston is damaged, or the push rod of the syringe can be inferred, and the aim of preventing reuse is finally achieved. At present, a plurality of retraction self-destruction syringes exist in the market, the syringes can retract into the syringes after injection by arranging a specific assembly structure to realize the self-destruction function, but the safety performance of the retraction self-destruction syringes restricts the wide popularization of the product, a user usually needs to extract liquid medicine for many times for dispensing when using the syringes, because the air in the syringes needs to be ensured to be completely discharged, the injection rod needs to be pushed to the zero position of the syringes, the operation is easy to cause safety problems, the self-destruction function of the syringes is triggered when the injection rod is pushed to the zero position, the syringes cannot be used, on the other hand, when the user uses the syringes to inject medicaments for patients, the operation is also easy to fail, the self-destruction function of the syringes is triggered in the injection process, the needle tubes are directly pulled out accidentally in the patients, medical accidents may occur.

Disclosure of Invention

In order to solve the technical problems, the technical scheme provided by the invention is a novel composite type safe self-destruction injector, which comprises an injection tube, an injection rod, a sealing ring and a needle seat, wherein the injection tube comprises a standard wide section and a widened wide section, the width of the inner wall of the widened wide section is larger than that of the standard wide section, the widened wide section is positioned at the top of the injection tube, a fixing groove for fixing is arranged on the standard wide section close to the widened wide section, the injection rod is movably connected in the injection tube, the bottom of the injection rod is hermetically matched with the inner wall of the injection tube, a cavity is arranged in the injection rod, a spring sleeve capable of moving upwards relative to the injection rod is arranged below the cavity, a compression spring is arranged between the inner part of the spring sleeve and the injection rod, an exhaust hole is arranged on the outer wall of the injection rod, a clamping joint is arranged at the, the injection device is characterized in that a clamping block used for propping the bottom of the spring sleeve is arranged on the inner wall of the injection rod, the sealing ring is arranged at the bottom of the injection tube, a through hole is formed in the middle of the sealing ring, convex ribs matched with a fixing groove are arranged on two sides of the sealing ring, the needle seat comprises a first step face, a second step face and a third step face, the width of the needle seat is reduced from bottom to top in sequence, the needle seat is fixed in the through hole of the sealing ring through the first step face, a clamping groove matched with the clamping head is formed in the first step face, and a needle head is.

Preferably, the clamping block is in a four-section equal-division structure and is annularly arranged on the inner wall of the injection rod.

Preferably, the bottom of the sealing ring is provided with a concave surface matched with the top of the rubber sealing plug.

Preferably, the top of the injection rod is clamped with a rear cover.

Preferably, a clamping groove for clamping the top of the injection rod is arranged in the rubber sealing plug.

Preferably, the first step surface and the sealing ring form a buffer cavity.

Compared with the prior art, the invention has the following advantages: the fixed slot has been set up, can play good fixed action with protruding muscle cooperation on the sealing ring, the injection pole adopts the design of two kinds of different width, can make sealing ring and sealing rubber be difficult for the rebound, the exhaust hole can play laborsavingly, conveniently return the syringe needle that contracts, set up the stability of the guarantee spring housing that the fixture block can be better, airtight in the middle of the compression spring, can reduce the winding, thereby alleviate assembly work load, the syringe is equipped with the structure that contracts of vapour-pressure type and spring simultaneously, guarantee syringe safety when using, set up the buffer cavity in the syringe, when needing to use the syringe to dispense, can not trigger the self-destruction function when injection pole propelling movement to zero-bit, thereby make the injection pole can relapse propelling movement to zero-bit and dispense safely.

Drawings

FIG. 1 is a schematic view of the overall structure of a novel composite safety self-destruction syringe of the present invention.

FIG. 2 is a schematic view of the structure of the injection rod of the novel composite safety self-destruction syringe.

FIG. 3 is a schematic view of a sealing ring structure of the novel composite safety self-destruction syringe.

Fig. 4 is a schematic structural view of a needle stand of the novel composite safety self-destruction syringe.

Fig. 5 is a schematic structural view of a rubber sealing plug of the novel composite type safe self-destruction syringe.

Fig. 6 is a cross-sectional view at a-a in fig. 2.

FIG. 7 is a schematic view of the zero state of the present invention.

Fig. 8 is a schematic diagram of the start-up state of the present invention.

FIG. 9 is a schematic diagram of the self-destruction initial state of the present invention.

FIG. 10 is a schematic diagram of the fully self-destructed state of the present invention.

Fig. 11 is a schematic view of the compression spring structure of the present invention.

As shown in the figure: 1. injection tube, 2, injection pole, 3, sealing ring, 4, needle file, 5, standard wide section, 6, widen wide section, 7, fixed slot, 8, spring housing, 9, compression spring, 10, exhaust hole, 11, joint, 12, gluey sealing plug, 13, fixture block, 14, through-hole, 15, protruding muscle, 16, first step face, 17, second step face, 18, third step face, 19, draw-in groove, 20, syringe needle, 21, concave surface, 22, back lid, 23, joint groove, 24, buffering cavity.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

With reference to the attached drawings, a novel composite type safe self-destruction injector comprises an injection tube 1, an injection rod 2, a sealing ring 3 and a needle seat 4, wherein the injection tube 1 comprises a standard wide section 5 and a widened wide section 6, the width of the inner wall of the widened wide section 6 is greater than that of the standard wide section 5, the widened wide section 6 is positioned at the top of the injection tube 1, a fixing groove 7 for fixing is arranged on the standard wide section 5 close to the widened wide section 6, the injection rod 2 is movably connected in the injection tube 1, the bottom of the injection rod 2 is hermetically matched with the inner wall of the injection tube 1, a cavity is arranged in the injection rod 2, a spring sleeve 8 which can move upwards relative to the injection rod 2 is arranged below the cavity, a compression spring 9 is arranged between the interior of the spring sleeve 8 and the injection rod 2, an exhaust hole 10 is arranged on the outer wall of the injection rod 2, a clamping joint 11 is arranged at the top of the spring sleeve, the injection device is characterized in that a clamping block 13 used for supporting the bottom of the spring sleeve 8 is arranged on the inner wall of the injection rod 2, the sealing ring 3 is arranged at the bottom of the injection tube 1, a through hole 14 is formed in the middle of the sealing ring 3, convex ribs 15 matched with the fixing groove 7 are arranged on two sides of the sealing ring 3, the needle seat 4 comprises a first step surface 16, a second step surface 17 and a third step surface 18, the width of the first step surface 16 is gradually reduced from bottom to top, the needle seat 4 is fixed in the through hole 14 of the sealing ring 3 through the first step surface 16, a clamping groove 19 matched with the clamping joint 11 is formed in the first step surface 16, and a needle head 20 is.

The fixture block 21 is in a four-section equal-division structure and is annularly arranged on the inner wall of the injection rod 2.

The bottom of the sealing ring 3 is provided with a concave surface 21 matched with the top of the rubber sealing plug 12.

The top of the injection rod 2 is clamped with a rear cover 22.

A clamping groove 23 for clamping the top of the injection rod 2 is arranged in the rubber sealing plug 12.

The first step surface 16 and the seal ring 3 form a relief cavity 24.

The end part of the injection rod is provided with two designs of the widened wide section and the standard wide section with different widths, the width of the inner wall of the widened wide section is larger than that of the standard wide section, the sealing ring can be guaranteed to move downwards along with the injection rod more easily and laborsavingly, meanwhile, the sealing ring and the rubber sealing plug can be prevented from returning to the standard wide section again, the end part of the spring sleeve is clamped with the clamping block on the inner wall of the injection rod, the integral stability during use is guaranteed, the air pressure can be reduced through the exhaust hole on the injection rod, the effect of saving labor during needle head recovery is achieved, the middle of the compression spring is designed in a tight connection mode, the effect of reducing the spring winding together can be achieved, and the design can achieve the effect of reducing the workload regardless of automatic assembly or.

The using method of the invention is as follows:

1. when a syringe is needed to dispense medicines, as shown in fig. 7, a user pushes the injection rod to a zero position state, and at the moment, the clamping head of the spring sleeve is positioned in the buffer cavity of the needle seat and cannot be clamped with the clamping groove on the needle seat, so that the self-destruction function is avoided being triggered, and safe medicine dispensing is realized;

2. after the medicine is dispensed, the medicine is required to be injected into the body of a patient, as shown in fig. 8, the injection rod is pushed to be in a starting state, the clamping head of the spring sleeve is positioned in the buffer cavity of the needle base and cannot be clamped with the clamping groove on the needle base, the self-destruction function cannot be triggered, the safety in injection is guaranteed, and medical accidents are avoided;

3. after the syringe is pulled out of the human body after injection is finished, the self-destruction of the syringe is needed to be realized, as shown in fig. 9, the injection rod of the syringe is continuously pushed downwards from the state shown in fig. 8, the lower end part of the injection rod extrudes the sealing ring, so that the convex ribs on the two sides of the sealing ring are separated from the clamping connection of the fixed groove and move along with the widened section of the injection rod from the standard wide end to the lower part, the compressed air generated by the gap between the sealing ring and the injection tube generates elastic stress on the first step surface to push the needle seat to be upward and larger until the clamping head passes through the buffer cavity and is clamped with the clamping groove on the needle seat, the injection rod is continuously pushed downwards, so that the end, meanwhile, because the width of the standard wide section is smaller than that of the widened wide section, and the sealing ring and the rubber sealing plug are provided with the convex ribs at two sides, the sealing ring and the rubber sealing plug cannot return to the standard wide section when entering the area of the widened wide section;

4. under compression spring's effect, as shown in fig. 10, the elastic stress of spring housing and compressed air to the elastic stress of needle file make spring housing and needle file pop into the cavity of injection pole together, compression spring can roof pressure spring housing the top in the injection pole cavity after stretching, thereby ensure that the syringe needle can not fall back and expose the injection pole, owing to it has the bleeder vent to open on the injection pole, so make things convenient for the syringe needle to kick-back more, through such combined type syringe package assembly, can have obvious stage division when user's operation syringe implements injection and self-destruction, each stage all has clear operation feedback, can guarantee to implement the security of injection, realize the reliability of self-destruction.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a novel combined type safety self-destruction syringe, includes injection tube (1), injection pole (2), sealing ring (3) and needle file (4), its characterized in that: the injection tube (1) comprises a standard wide section (5) and a widened wide section (6), the width of the inner wall of the widened wide section (6) is larger than that of the standard wide section (5), the widened wide section (6) is positioned at the top of the injection tube (1), a fixing groove (7) with a fixing effect is arranged on the standard wide section (5) close to the widened wide section (6), the injection rod (2) is movably connected in the injection tube (1), the bottom of the injection rod (2) is hermetically matched with the inner wall of the injection tube (1), a cavity is arranged in the injection rod (2), a spring sleeve (8) capable of moving upwards relative to the injection rod (2) is arranged below the cavity, a compression spring (9) is arranged between the interior of the spring sleeve (8) and the injection rod (2), an exhaust hole (10) is arranged on the outer wall of the injection rod (2), a clamping joint (11) is arranged at the top of the spring sleeve (8, injection pole (2) top joint has rubber sealing plug (12), be equipped with on injection pole (2) inner wall and be used for withstanding fixture block (13) of spring housing (8) bottom, injection tube (1) bottom is arranged in sealing ring (3), sealing ring (3) middle part is equipped with through-hole (14), sealing ring (3) both sides are equipped with protruding muscle (15) with fixed slot (7) matched with, needle file (4) are including first step face (16), second step face (17) and third step face (18) that the width reduces in proper order from bottom to top, in needle file (4) are fixed in through-hole (14) of sealing ring (3) through first step face (16), be equipped with in first step face (16) and connect (11) matched with draw-in groove (19), third step face (18) inside is equipped with syringe needle (20).

2. The novel composite safety self-destruction syringe of claim 1, wherein: the fixture block (21) is of a four-section equal-division structure and is annularly arranged on the inner wall of the injection rod (2).

3. The novel composite safety self-destruction syringe of claim 1, wherein: and a concave surface (21) matched with the top of the rubber sealing plug (12) is arranged at the bottom of the sealing ring (3).

4. The novel composite safety self-destruction syringe of claim 1, wherein: the top of the injection rod (2) is clamped with a rear cover (22).

5. The novel composite safety self-destruction syringe of claim 1, wherein: a clamping groove (23) for clamping the top of the injection rod (2) is arranged in the rubber sealing plug (12).

6. The novel composite safety self-destruction syringe of claim 1, wherein: the first step surface (16) and the sealing ring (3) form a buffer cavity (24).