CN218165748U - Fixed dose self-destruction syringe - Google Patents

Abstract

The utility model relates to a fixed dose self-destruction injector, belonging to the field of sterile medical apparatus; the core rod is provided with at least two clamping tables from the top to the middle; the spring plate is sleeved on the core rod and comprises a spring plate body which is arranged into a U shape, the opening side of the spring plate is inwards provided with a folded edge, one end of the U-shaped bottom of the spring plate is provided with an inwards bent inner clamping body, the inner clamping body is matched with the clamping table, one end, facing outwards, of the side edge of the U-shaped opening of the spring plate is provided with an outwards opened outer clamping body, and the top end of the outer clamping body is provided with a clamping tip; and a reed sliding section is arranged between the two clamping tables on the outermost side of the core rod, the reed and the reed sliding section are arranged in a matched mode, the reed sliding section can slide in the reed, and the reed is kept immovable relative to the outer sleeve. The utility model provides a fixed dose's self-destruction syringe can suction the liquid medicine repeatedly, makes things convenient for the row of bubbles and dissolves the medicine, can realize the self-destruction function after the injection is accomplished, and the self-destruction function is reliable and stable.

Description

Fixed dose self-destruction syringe

Technical Field

The utility model relates to a fixed dose self-destruction injector, belonging to the field of aseptic medical instruments.

Background

The invention relates to a self-destruction injector with fixed dose, belonging to the field of sterile medical apparatus, which is specially used for injecting human vaccine, wherein the injector is automatically self-destroyed and ineffective after being used, and can not be reused, thus really realizing one-needle injection and effectively avoiding disease transmission caused by secondary use.

At present, domestic self-destruction syringes have various structures, some have certain defects in the use process, and can only be used for once liquid extraction and injection, and in the use process, liquid needs to be repeatedly extracted due to the influence of air bubbles in the exhaust cylinder or powder-type injections. Although the Chinese patent CN2787236Y is designed to achieve the effect of one-time use, the syringe cannot pull the core rod back and forth to suck the liquid medicine or discharge the gas in the barrel according to the clinical requirement due to the defect of structural design.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fixed dose's self-destruction syringe can suction the liquid medicine repeatedly, makes things convenient for the row of bubbles and dissolves the medicine, can realize the self-destruction function after the injection is accomplished, and the self-destruction function is reliable and stable.

The utility model discloses a fixed dose self-destruction injector, which comprises a core bar and an outer sleeve, wherein the core bar is provided with at least two clamping platforms from the top to the middle part; the spring plate is sleeved on the core rod and comprises a spring plate body which is in a U shape, the opening side of the spring plate is inwards provided with a folded edge, one end of the U-shaped bottom of the spring plate is provided with an inwards bent inner clamping body, the inner clamping body is matched with the clamping table, one end of the U-shaped opening side of the spring plate, which faces outwards, is provided with an outwards opened outer clamping body, and the top end of the outer clamping body is provided with a clamping tip; and a reed sliding section is arranged between the two clamping tables on the outermost side of the core rod, the reed and the reed sliding section are arranged in a matched mode, the reed sliding section can slide in the reed, and the reed is kept immovable relative to the outer sleeve.

Working process or working principle:

the fixed-dose self-destruction injector consists of an outer sleeve, a core bar, a rubber plug, a needle tube, a reed and a protective cap, wherein the needle tube is directly bonded to the head of the outer sleeve through an adhesive to form an integral structure, the protective cap is assembled on the head of the outer sleeve to protect the needle tube, the front end of the core bar is assembled with the rubber plug, the reed is assembled on the core bar, and the core bar, the rubber plug and the reed are arranged in the outer sleeve.

According to the fixed-dose self-destruction syringe, the clamping tables at the end of the core rod rubber plug are self-destruction clamping tables, the rest clamping tables are fixed-dose clamping tables, one group of fixed-dose clamping tables can be arranged, multiple groups of fixed-dose clamping tables can be arranged according to the dose, and the positions of the clamping tables need to be set according to the expected dose, so that the dose requirement is met.

In an initial state, the reed is arranged at any fixed dose clamping table, the core rod and the rubber plug are pushed to the bottom of the outer sleeve, and the rubber plug is attached to the outer sleeve.

And (3) pumping: and pulling the core rod, keeping the reed and the outer sleeve relatively immobile, and sliding the reed sliding section of the core rod relative to the reed until the reed crosses the clamping table at the foremost end of the core rod, so that the sucked dose reaches the pre-charged dose, and the suction is finished.

And (3) injection: the core bar is pushed forwards, the reed is driven by the core bar to move forwards, the core bar is pushed to the bottom of the outer sleeve, and the injection is finished.

Self-destruction: the core rod is pulled outwards, the outer clamping body of the reed is opened outwards, the clamping tip penetrates into the outer sleeve, self-destruction is achieved, and the self-destruction function is stable and reliable.

Preferably, the middle of the top end of the outer clamping body is inwards provided with a groove, the two sides of the top end of the outer clamping body are provided with clamping points, the clamping points are arranged towards the outer side, and the distance between the clamping points corresponding to the two outer clamping bodies is larger than the diameter of the inner wall of the outer sleeve. The groove structure may be trapezoidal.

Preferably, the angles of the two sides of the top end of the outer clamping body are consistent.

Preferably, the clamping table is arranged in a convex mode, the inner side of the clamping table is provided with a right-angle boss, and the outer side of the clamping table is provided with a guide inclined plane;

or the clamping table is arranged in an inwards concave manner, the inner side of the clamping table is provided with a guide inclined plane, and the outer side of the clamping table is provided with a right-angle boss.

Preferably, the front end of the inner clamping body is arranged close to the core rod surface. The front end of the inner clamping body is tightly attached to the surface of the core rod, the reed body is wrapped outside the core rod, and the folded edge is clamped on the core rod.

Preferably, the clamping platforms are arranged in the same direction; the clamping tables are symmetrically arranged along the core rod. Facilitating the automatic assembly of the reed.

Preferably, the bottom of the core rod is provided with a guide assembling section, the guide assembling section is flat, and the width of the flat side of the guide assembling section is smaller than the width of the opening of the reed.

Preferably, the core bar guide assembling section is provided with a press handle, two parallel guide edges are arranged on two opposite sides of the press handle, the guide edges are straight edges, and the guide edges are arranged corresponding to the flat sides of the guide assembling section.

Preferably, the core rod is provided with a positioning surface for matching and positioning with the inner side surface of the U-shaped opening of the reed.

Preferably, two positioning surfaces are oppositely arranged; two corresponding inner side surfaces of the U-shaped openings of the reeds are arranged. The core rod can be conveniently positioned on automatic assembly equipment, and the reed is assembled on the core rod.

Preferably, the reed sliding section is a smooth reed sliding section.

The reed is made of stainless steel.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model has the advantages that the clamping table is arranged on the core rod, the reed is assembled on the core rod, the reed sliding section is arranged on the core rod, the reed sliding section can move repeatedly, the liquid medicine can be sucked repeatedly in the area, the air bubble removal and the medicine dissolution are convenient, and the clinical requirement is met; the reed, the clamping table and the outer sleeve are matched, so that the reed can conveniently penetrate into the inner wall of the outer sleeve, the self-destruction function is realized, the operation is simple and convenient, and the self-destruction function is reliable.

Drawings

FIG. 1: the structure of an embodiment of the utility model is schematically shown,

FIG. 2 is a schematic diagram: the sectional structure of A-A in figure 1 is schematic,

FIG. 3: the schematic view of the core bar structure,

FIG. 4: the core bar structure of another embodiment of the utility model is schematically shown,

FIG. 5: the enlarged structure at B in figure 3 is schematically shown,

FIG. 6: in the view in the direction of C in figure 3,

FIG. 7 is a schematic view of: the structure of the utility model is schematically shown in the initial state,

FIG. 8: the structure of the utility model is schematically illustrated when the pumping dosage reaches the pre-charging dosage state,

FIG. 9: the structure of the injection completion state of one embodiment of the utility model is schematically shown,

FIG. 10: the structure diagram of the utility model for realizing the self-destruction state by drawing after the injection is completed,

FIG. 11: the schematic view of the main structure of the card,

FIG. 12: the left-hand side view of figure 11,

FIG. 13: fig. 11 is a top view.

In the figure: 1. a protective cap; 2. a needle tube; 3. a piston; 4. a jacket; 5. a reed; 6. a core bar;

5.1, folding the edge I; 5.2, an outer card body I; 5.3, an inner clamping body; 5.4, an outer card body II; 5.5, a reed body; 5.6, folding the edge II; 5.7, the inner side surface I; 5.8, the inner side surface II;

5.21, a first groove; 5.22, a first bayonet;

5.41, groove two; 5.42, a second card tip;

6.1, self-destruction of the clamping table; 6.2, a reed sliding section; 6.3, a first fixed dose block; 6.4, a second fixed dose block; 6.5, a guide assembling section; 6.6, positioning the first surface; 6.7, positioning surface II; 6.8, pressing hands; 6.9, a third fixed dose block;

6.11, a right-angle boss; 6.12, a guide inclined plane;

6.81 and a guide edge.

Detailed Description

Example 1

As shown in fig. 1-13, the fixed dose auto-disable syringe of the present invention comprises a sheath 4, a core bar 6, a rubber plug, a needle tube 2, a reed 5, and a protective cap 1, wherein the needle tube 2 is directly bonded on the head of the sheath 4 by a bonding agent to form an integrated structure, the protective cap 1 is assembled on the head of the sheath 4 to protect the needle tube 2, and the top of the core bar 6 is assembled with the rubber plug to form a plunger assembly. The rubber plug is one of the pistons 3. The core bar 6 is provided with at least two clamping platforms from the top to the middle part;

as shown in fig. 3, the clamping platform can be arranged in a convex manner, the inner side of the clamping platform is provided with a right-angle boss 6.11, and the outer side of the clamping platform is provided with a guide inclined surface 6.12;

as shown in fig. 4, alternatively, the clamping table may be recessed, the inner side of the clamping table is provided with a guiding inclined plane, and the outer side of the clamping table is provided with a right-angled boss.

The spring 5 is sleeved on the core rod 6, the spring 5 comprises a spring body 5.5 which is set into a U shape, a folded edge is arranged in the opening side direction of the spring 5, an inner clamping body 5.3 which is bent inwards is arranged at one end of the U-shaped bottom of the spring 5, the inner clamping body 5.3 is matched with the clamping table, an outer clamping body which is opened outwards is arranged at one end, facing outwards, of the U-shaped opening side edge of the spring 5, and a clamping tip is arranged at the top end of the outer clamping body; a groove is formed inwards in the middle of the top end of the outer clamping body, clamping points are arranged on two sides of the top end of the outer clamping body, and the clamping points are arranged towards the outer side. The distance between the corresponding clipping tips of the two outer clipping bodies is larger than the diameter of the inner wall of the outer sleeve 4.

The clamping angle degrees of the two sides of the top end of the outer clamping body are consistent.

Wherein:

the outer clamping body comprises a first outer clamping body 5.2 and a second outer clamping body 5.4, a first groove 5.21 is formed in the top end of the first outer clamping body 5.2, and a first clamping point 5.22 is formed on two sides of the first groove; the top end of the second outer clamping body 5.4 is provided with a second groove 5.41, and two sides of the second groove form a second clamping point 5.42.

The folded edge comprises a folded edge I5.1 and a folded edge II 5.6, and the folded edge I1 and the folded edge II 5.6 are obliquely arranged.

Be equipped with reed sliding segment 6.2 between two ka tai in the outermost side on core bar 6, reed 5 and reed sliding segment 6.2 cooperate the setting, and reed sliding segment 6.2 can slide in reed 5, and reed 5 keeps motionless relative overcoat 4.

The clamping platforms are arranged in the same direction; the clamping platforms are symmetrically arranged along the core rod 6. The clamping tables at the end of the core rod rubber plug are self-destruction clamping tables 6.1, the other clamping tables are fixed dose clamping tables, one group of fixed dose clamping tables can be arranged, multiple groups of fixed dose clamping tables can be arranged according to the size of the dose, and the positions of the clamping tables need to be set according to the expected dose size, so that the dose requirement is met.

As shown in fig. 3, the fixed dose blocking table may be provided with a first fixed dose blocking table 6.3 and a second fixed dose blocking table 6.4, the first fixed dose blocking table 6.3 and the second fixed dose blocking table 6.4 have different preset doses, and the initial state of the reed 5 may be set at the first fixed dose blocking table 6.3 or the second fixed dose blocking table 6.4 according to actual requirements.

As shown in fig. 4, the fixed dose blocking table may be provided with a first fixed dose blocking table 6.3, a second fixed dose blocking table 6.4 and a third fixed dose blocking table 6.9, the preset doses of the first fixed dose blocking table 6.3, the second fixed dose blocking table 6.4 and the third fixed dose blocking table 6.9 are different, and the initial state of the reed 5 may be set at the first fixed dose blocking table 6.3, the second fixed dose blocking table 6.4 or the third fixed dose blocking table 6.9 according to actual needs.

As shown in figures 3-4, the front end of the inner clamping body is arranged to cling to the surface of the core rod 6. The bottom of the core rod 6 is provided with a guide assembling section 6.5, the guide assembling section 6.5 is flat, and the width of the flat side of the guide assembling section 6.5 is smaller than the width of the opening of the reed 5. The cross section of the guide assembling section 6.5 is square, the width of the flat side of the guide assembling section 6.5 is smaller than that of the other side of the guide assembling section 6.5, and the reed 5 is convenient to assemble.

The guide assembling section 6.5 of the core rod 6 is provided with a press handle 6.8, two parallel guide edges 6.81 are arranged on two opposite sides of the press handle 6.8, the guide edges 6.81 are straight edges, and the guide edges 6.81 are arranged corresponding to the flat sides of the guide assembling section 6.5.

The end of the spring 5 facing outwards from the U-shaped opening side is the end facing the press hand 6.8 of the core rod.

The cross section of the core rod 6 can be square, and the core rod is matched with the U-shaped opening inner cavity of the reed body.

The core rod 6 is provided with a positioning surface for matching and positioning with the inner side surface of the U-shaped opening of the reed 5.

The two positioning surfaces are oppositely arranged and comprise a first positioning surface 6.6 and a second positioning surface 6.7; two corresponding inner side surfaces of the U-shaped openings of the reeds 5 are respectively a first inner side surface 5.7 and a second inner side surface 5.8; the first 5.7 inner side surface and the first 6.6 positioning surface are matched; the second inner side surface 5.8 is matched with the second positioning surface 6.7.

Working process or working principle:

the opening of the reed 5 corresponds to the flat side of the guide assembly section 6.5 of the core rod 6, the reed is assembled on the core rod, the reed 5 is pushed forwards, and the reed and the core rod are assembled. The core bar 6, the rubber plug and the reed 5 are arranged in the outer sleeve 4.

In the initial state of the fixed dose auto-disable syringe, as shown in fig. 1-4 and 7-10, the reed 5 is positioned at the left side of the first fixed dose catch 6.3; the reed 5 can also be arranged at the left side of the second fixed dose clamping table 6.4; at the moment, the inner clamping body 5.3 is abutted against the right-angle boss 6.11, the whole plunger assembly is arranged in the inner cavity of the outer sleeve and pushed to the bottom, and the rubber plug is attached to the outer sleeve. Due to the elasticity of the outer clamping body of the spring 5, the clamping point of the spring is contacted with the inner wall of the outer sleeve 4, and the spring 5 can only move in one direction, namely can only move downwards.

And (3) pumping: pulling the core rod 6, keeping the reed 5 and the outer sleeve 4 relatively immobile, sliding the reed sliding section 6.2 of the core rod 6 relative to the reed, until the reed 5 passes over the self-destruction clamping table 6.1, clamping the reed by the self-destruction clamping table 6.1, and the core rod 6 can not be drawn continuously due to the clamping tip of the reed 5, wherein the amount of the sucked liquid medicine is the required pre-charging amount.

And (3) injection: and applying a pushing force to the core rod 6 to complete injection, wherein the core rod 6 drives the reeds 5 to move together, and the injection is completed.

Self-destruction: when the core rod 6 is pulled outwards, the clamping point can pierce the inner wall of the outer sleeve 4 to form force interference, the core rod 6 is prevented from being pulled outwards, and the product is self-destructed.

A reed sliding section which can be used for drawing the core rod back and forth is arranged between the self-destruction clamping table and the fixed dose clamping table on the core rod, the core rod can freely move through the reed in the section, and the reed does not shift, thereby being convenient for clinically discharging gas in the injector or diluting powder.

The utility model discloses in to the direction of structure and the description of relative position relation, it is right not to constitute like the description from top to bottom all around the utility model discloses a restriction only is the description convenient.

Claims (10)

1. A fixed dose self-destruction injector is characterized by comprising a core rod (6) and an outer sleeve (4), wherein the core rod (6) is provided with at least two clamping platforms from the top to the middle;

a reed (5) is sleeved on the core rod (6), the reed (5) comprises a reed body (5.5) which is set into a U shape, a folded edge is arranged in the side direction of an opening of the reed (5), an inner clamping body (5.3) which is bent inwards is arranged at one end of a U-shaped bottom of the reed (5), the inner clamping body (5.3) is matched with the clamping table, an outer clamping body which is opened outwards is arranged at one end, facing outwards, of the side edge of the U-shaped opening of the reed (5), and a clamping tip is arranged at the top end of the outer clamping body;

a reed sliding section (6.2) is arranged between two clamping tables on the outermost side of the core rod (6), the reed (5) and the reed sliding section (6.2) are matched, the reed sliding section (6.2) can slide in the reed (5), and the reed (5) is kept still relative to the outer sleeve (4).

2. The fixed-dose self-destruct syringe of claim 1, wherein a recess is formed inward in the middle of the top end of the outer clip body, and clipping tips are formed on both sides of the top end of the outer clip body and are arranged outward.

3. The fixed-dose, self-destructing syringe according to claim 2, wherein the angles of the two sides of the top end of the outer clip body are identical.

4. The fixed dose self-destruct syringe of claim 2, wherein the clamp is provided with a convex projection, the inner side of the clamp is provided with a right-angled boss, and the outer side of the clamp is provided with a guide slope;

or the clamping table is arranged in an inwards concave manner, the inner side of the clamping table is provided with a guide inclined plane, and the outer side of the clamping table is provided with a right-angle boss.

5. Fixed dose self-destruct syringe according to claim 1, characterized in that the front end of the inner clip is placed against the face of the core rod (6).

6. A fixed dose self-destruct syringe according to any of claims 1 to 5, wherein the catches are co-directionally arranged; the clamping platforms are symmetrically arranged along the core rod (6).

7. Fixed dose auto-disable syringe according to any one of claims 1 to 5, characterized in that the base of the core rod (6) is provided with a guide fitting section (6.5), the guide fitting section (6.5) is provided with a flat shape, and the width of the flat side of the guide fitting section (6.5) is smaller than the width of the opening of the spring (5).

8. Fixed dose self-destruct syringe according to claim 7, characterized in that the guide-assembling section (6.5) of the core rod (6) is provided with a knob (6.8), two parallel guide edges (6.81) being provided on opposite sides of the knob (6.8), the guide edges (6.81) being straight edges, the guide edges (6.81) being provided corresponding to the flat sides of the guide-assembling section (6.5).

9. A fixed dose self-destruct syringe according to any one of claims 1 to 5, wherein the core rod (6) is provided with locating surfaces for co-locating with the inside faces of the U-shaped openings of the leaves (5).

10. A fixed dose self-destruct syringe according to claim 9, wherein the locating surfaces are oppositely disposed two; two corresponding inner side surfaces of the U-shaped openings of the reeds (5).

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