CN209004906U - A kind of syringe - Google Patents

Abstract

The utility model discloses a kind of syringes, belong to medical instruments field, it is intended to provide that be only capable of expendable structure simple, low-cost syringe, its key points of the technical solution are that including injection tube, injection tube one end is provided with injection connector, injection needle is connected on injection connector, the sealing-plug moved along injection tube inner chamber is provided in injection tube, injection rod is connected on sealing-plug, one end far from injection connector on the inside of injection tube offers annular groove, fixed restraining position ring block on injection rod, stop collar side opens up own centre line along the limiting slot of stop collar radial direction, pressure spring is placed in limiting slot, the gag lever post compressed with pressure spring is placed in limiting slot, the bar for stretching out limiting slot is installed on gag lever post, bar outer sheath is equipped with the limit film being fixed on stop collar, injection tube is provided with chamfering on the inside of the end face far from injection connector.The utility model solves the problems, such as existing Disposable, self-destroying syringe construction complexity, higher cost.

Description

A kind of syringe

Technical field

The utility model relates to medical instruments field, in particular to a kind of syringe.

Background technique

Syringe is a kind of common medical equipment, and drug injection is entered human body by function, the blood and body fluid with human body Directly contact.It spreads the disease to avoid infection, laws and regulations all prohibite syringe reuse, must lose after use It abandons and destroys.But some criminals and some non-normal medical clinics carry out syringe repeatedly for number one Ground uses, and causes great hidden danger to the life security of people.Century, a wherein big route of transmission for incurable disease AIDS was Shared and reuse syringe, this brings great threat to the life and health of people.

People research and develop many kinds with can be with the disposable injection of auto-destruct after apparatus for destroying use in recent years Device, Authorization Notice No. are the Chinese invention patent file of CN101249291B, disclose a kind of safety injector, the syringe packet Include housing, piston, core bar, needle assembly, housing rear portion are equipped with core bar locking ring, activity installation syringe needle group in the needle holder of front Part, needle assembly include needle tubing, needle tubing seat, needle tubing seat snap ring, sealing ring, and needle tubing seat is movably arranged on by needle tubing seat snap ring In the needle holder of housing front, needle tubing seat snap ring tight fit is fixed in the snap ring cavity of needle holder, which is provided with lean-in Oblique elastic damping pawl, needle tubing seat rear portion are equipped with the engaging cylinder of a protrusion, and core bar protruding front section is equipped with and needle tubing seat card Close the engaging cavity that cylinder matches, shape is consistent.After injection, engaging cylinder is fastened in the engaging cavity of core bar, It pulls back core bar, needle tubing seat etc. is driven to be reduced in housing, core bar and core bar locking ring cooperate, and cannot move forward and retreat again, primary to infuse Self-destruction can be realized after penetrating.

But this disposable syringe can structure is complicated, higher cost.

Utility model content

The purpose of this utility model is to provide a kind of syringes, have structure simple, cost is relatively low, is only capable of using primary The advantages of.

The above-mentioned technical purpose of the utility model has the technical scheme that a kind of syringe, including Injection tube, described injection tube one end are provided with injection connector, are connected with injection needle on the injection connector, in the injection tube It is provided with the sealing-plug moved along injection tube inner chamber, is connected with the injection rod for stretching out injection tube, the injection on the sealing-plug Cylinder inside offers annular groove, fixed restraining position ring block on the injection rod far from one end of injection connector, and the stop collar side is opened It is placed with pressure spring along the limiting slot of stop collar radial direction, the limiting slot equipped with center line, is placed in the limiting slot The gag lever post compressed with pressure spring backwards to the end face of limit groove bottom, the gag lever post are installed with stretching limit far from the end face of pressure spring The bar of slot, the bar diameter are less than limit shank diameter and can be embedded in annular groove, and the bar outer sheath, which is equipped with, is fixed on limit Limit film on the ring of position, the injection tube are provided with chamfering on the inside of the end face far from injection connector.

By using above-mentioned technical proposal, the syringe is not before use, sealing-plug contacts at injection tube close to injection connector End face；Gag lever post is limited in limiting slot by limit film, when using the syringe, pushes injection rod mobile, injection rod is mobile Sealing-plug is driven to move along injection tube, injection rod drives the gag lever post in stop collar mobile simultaneously, and gag lever post is mobile to drive bar It is mobile, after bar is moved at the chamfering on injection tube, with the movement of injection rod, active force of the bar by injection tube, band Dynamic gag lever post is moved along limiting slot, and pressure spring is compressed in the movement of gag lever post；When bar is moved at annular groove, pressure spring is pushed Gag lever post drives bar mobile, and bar is pushed into annular groove, injection rod, edge while bar presses on annular groove bottom surface are continued to press on Annular groove axis direction is mobile, until sealing-plug contacts at injection tube close to the side of injection connector, completes the injection of drug；If thinking When reusing the syringe, need to twitch injection rod, along when moving far from injection connector direction, bar can press on injection rod Annular groove is along annular groove axis direction and far from the side for injecting connector, to limit continuing to move to for bar, bar limits stop collar It is formed in injection tube, prevents reusing for the syringe.

The utility model is further arranged to: the limitation being installed between stop collar and sealing-plug on the injection rod Mechanism.

By using above-mentioned technical proposal, in injection rod transportational process, injection rod is because being shaken or other active forces Sealing-plug may be driven to move along injection tube, limiting mechanism can limit bar movement by annular groove, and bar is avoided to pass through after annular groove The syringe is caused to scrap.

The utility model is further arranged to: the limiting mechanism include be fixed on injection rod and be located at stop collar with it is close Limitation bar between blocking, the limitation bar are greater than in injection tube backwards to the end face of injection rod away from the distance of injection rod axis Diameter.

By using above-mentioned technical proposal, when syringe injection drug is not used, if injection rod is by other effects When power drives sealing-plug mobile, injection rod drives limitation bar mobile simultaneously, before bar is moved to annular groove, limits bar elder generation and injection tube End face backwards to injection connector contradicts, and stops limitation bar to continue mobile towards injection connector direction, when needing to use the syringe When, it is first broken down from injection rod with hand by bar is limited, limitation of the mechanism that just can lift restrictions to injection rod.

The utility model is further arranged to: the limitation bar is fixed with thin plate far from one end of injection rod.

By using above-mentioned technical proposal, the rotation of limitation bar can be driven by rotating thin plate, so that bar will be limited from note It penetrates rotation on bar to remove, be removed from injection rod convenient for limitation bar.

The utility model is further arranged to: the thin sheet surface is provided with skid resistance strip.

By using above-mentioned technical proposal, the setting of skid resistance strip can increase friction factor when finger and sheet contacts, Active force is applied to thin plate convenient for finger, improves the convenience of rotation thin plate.

The utility model is further arranged to: the injection rod side is located at stop collar and offers far from one end of sealing-plug Subtract power slot.

By using above-mentioned technical proposal, structural strength of the injection rod far from sealing-plug one end can be reduced by subtracting power slot, when this After syringe uses once, annular groove limits bar；When someone pulls injection rod by force, injection rod is by certain effect After power in open up subtract at power slot be broken, reduce by bar pull out annular groove the case where occur, it is ensured that the syringe is only capable of using primary.

The utility model is further arranged to: the injection rod is installed with push plate far from one end of sealing-plug.

By using above-mentioned technical proposal, the setting of push plate is convenient for pushing the movement of injection rod, convenient for the use of syringe.

The utility model is further arranged to: the end face of the push plate towards sealing-plug, which is installed with, to be sheathed on the outside of injection rod Rotary table, the bottom surface of the rotary table is overlapped with the end face of push plate.

By using above-mentioned technical proposal, the setting of rotary table will not influence manpower and push plate pushed to drive injection rod towards note It is mobile to penetrate connector direction, if but someone need for injection rod to be directed away from injection connector direction when wanting to reuse the syringe Injection rod is pulled, but the setting of rotary table keeps the pull operation of injection rod difficult, reduces and pulls injection rod that bar is pulled out ring by force The case where slot, occurs.

The utility model is further arranged to: the limiting slot of the stop collar side is circumferentially provided with multiple along stop collar.

By using above-mentioned technical proposal, limiting slot setting is multiple, and gag lever post is provided in limiting slot, is set on gag lever post It is equipped with bar, the bar for stretching out limiting slot insertion annular groove has multiple, increases the difficulty of bar extraction annular groove, prevents the injection Device reuses.

The utility model is further arranged to: the bar is set as and annular groove bottom surface far from the end face of gag lever post Cambered surface.

By using above-mentioned technical proposal, the end face that cambered surface can make bar protrude into annular groove is matched with the conflict of annular groove bottom surface completely It closes, to increase the conflict area of bar side and annular groove along the side of its axis direction, further increases and take out bar The difficulty of annular groove out.

In conclusion the utility model has the following beneficial effects:

1, the syringe is not before use, sealing-plug contacts at injection tube close to the end face of injection connector；Limit film will limit Bar is limited in limiting slot, when using the syringe, pushes injection rod mobile, and injection rod is mobile to drive sealing-plug to move along injection tube Dynamic, injection rod drives the gag lever post in stop collar mobile simultaneously, and gag lever post is mobile to drive bar mobile, and bar is moved to injection tube On chamfering at after, with the movement of injection rod, active force of the bar by injection tube drives gag lever post to move along limiting slot, Pressure spring is compressed in the movement of gag lever post；When bar is moved at annular groove, pressure spring pushes gag lever post to drive bar mobile, will Bar is pushed into annular groove, is continued to press on injection rod, is moved while bar presses on annular groove bottom surface along annular groove axis direction, until Sealing-plug contacts at injection tube close to the side of injection connector, completes the injection of drug；If want to reuse the syringe, need Twitch injection rod, injection rod along when being moved far from injection connector direction, bar can press on annular groove along annular groove axis direction and Side far from injection connector, to limit continuing to move to for bar, stop collar is limited in injection tube by bar, prevents the note Emitter reuses；

2, when syringe injection drug is not used, if injection rod is driven sealing-plug mobile by other active forces, Injection rod drives limitation bar mobile simultaneously, and before bar and annular groove conflict, limitation bar is first with injection tube backwards to the end face of injection connector Contradict, stop limitation bar to continue mobile towards injection connector direction, when needing using the syringe, first with hand will limit bar from It is broken down on injection rod, limitation of the mechanism that just can lift restrictions to injection rod；

3, the setting of rotary table will not influence manpower and push push plate drive injection rod direction injection connector direction movement, if but When someone wants to reuse the syringe, needs for injection rod to be directed away from injection connector direction and pull injection rod, but rotary table Being arranged keeps the pull operation of injection rod difficult, reduces the case where pulling injection rod that bar is pulled out annular groove by force and occurs.

Detailed description of the invention

Fig. 1 is the whole the schematic diagram of the section structure of embodiment 1；

Fig. 2 is enlarged drawing at A in Fig. 2；

Fig. 3 is the schematic diagram of the section structure of injection rod in embodiment 2；

Fig. 4 is the schematic diagram of the section structure in embodiment 3 after syringe use.

In figure, 1, injection tube；11, connector is injected；12, chamfering；2, injection rod；21, subtract power slot；3, sealing-plug；4, it injects Syringe needle；5, annular groove；6, stop collar；61, limiting slot；62, pressure spring；63, gag lever post；64, bar；65, limit film；66, cambered surface；7, Limiting mechanism；71, bar is limited；72, thin plate；8, push plate；9, rotary table.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.The wherein identical attached drawing of identical components Label indicates.It should be noted that word "front", "rear" used in the following description, "left", "right", "up" and "down" refer to It is the direction in attached drawing, word " bottom surface " and " top surface ", "inner" and "outside" are referred respectively to towards or away from particular elements geometry The direction at center.

Embodiment 1

A kind of syringe, as shown in Figure 1, including using macromolecule polypropylene for injection tube 1 made from material, injection tube 1 One end is provided with the injection connector 11 being connected to 1 inner cavity of injection tube, is plugged on the outside of injection connector 11 and is connected to injection connector 11 Injection needle 4.

As shown in Figure 1,1 inner cavity of injection tube is placed with sealing-plug 3, sealing-plug 3 is made using rubber for material, sealing-plug 3 It is interference fitted with 1 inner cavity of injection tube, guarantees the leakproofness in injection tube 1 between sealing-plug 3 and injection connector 11, prevent using note Air is sealed between plug 3 and injection connector 11 in emitter injection pharmaceutical procedures.

As shown in Figure 1, the injection rod 2 for driving sealing-plug 3 to move along 1 inner cavity of injection tube is fixedly connected on sealing-plug 3, note It is cross that bar 2, which is penetrated, along the cross sectional shape perpendicular to 2 axis of injection rod, can also be other shapes such as circle, rice shape, linear type Shape.

As depicted in figs. 1 and 2, the inside of injection tube 1 offers annular groove 5 far from one end of injection connector 11, and annular groove 5 is along passing through The section of 1 axis of injection tube is with two rectangles of 1 axisymmetrical of injection tube.

As shown in Figure 1,2 side of injection rod is arranged fixed restraining position ring block 6 far from one end of sealing-plug 3,6 outer diameter of stop collar is small In 1 internal diameter of injection tube.

As depicted in figs. 1 and 2, own centre line is opened up on stop collar 6 along the limiting slot 61 of 6 radial direction of stop collar, limit It is placed with pressure spring 62 in slot 61, the gag lever post compressed with pressure spring 62 backwards to the end face of 61 bottom surface of limiting slot is placed in limiting slot 61 63, gag lever post 63 is installed with the bar 64 for stretching out limiting slot 61 far from the end face of pressure spring 62, and 64 diameter of bar is less than gag lever post 63 It diameter and can be embedded in annular groove 5.

As shown in Fig. 2, 64 outer sheath of bar is equipped with the cementing limit film 65 being fixed on stop collar 6, limit film 65 will be limited Position bar 63 is limited in limiting slot 61.

As shown in Fig. 2, being provided with chamfering 12 on the inside of end face of the injection tube 1 far from injection connector 11.

As shown in Figure 1, the syringe does not contact at injection tube 1 close to the end face of injection connector 11 using preceding sealing-plug 3.

As shown in Fig. 2, pushing injection rod 2 mobile when using the syringe, injection rod 2 is mobile to drive sealing-plug 3 along injection Cylinder 1 is mobile, and injection rod 2 drives the gag lever post 63 in stop collar 6 mobile simultaneously, and gag lever post 63 is mobile to drive bar 64 mobile, gear After bar 64 is moved at the chamfering 12 on injection tube 1, with the movement of injection rod 2, bar 64 is by injection tube 1 along injection tube 1 radial direction active force, bar 64 drive gag lever post 63 to move along limiting slot 61, and pressure spring 62 is pressed in the movement of gag lever post 63 Contracting.When bar 64 is moved at annular groove 5, pressure spring 62 pushes gag lever post 63 to drive bar 64 mobile, and bar 64 is pushed into annular groove 5 It is interior, injection rod 2 is continued to press on, is moved while bar 64 presses on 5 bottom surface of annular groove along 5 axis direction of annular groove, until sealing-plug 3 Injection tube 1 is contacted at close to the side of injection connector 11, completes the injection of drug.

As shown in Fig. 2, needing to twitch injection rod 2, injection rod 2 is along far from injection connector 11 when reusing the syringe When direction is mobile, bar 64 can press on annular groove 5 along 5 axis direction of annular groove and far from the side for injecting connector 11, to limit Bar 64 continues to move to, and stop collar 6 is limited in injection tube 1 by bar 64, prevents reusing for the syringe.

As shown in Figure 1,2 side of injection rod is fixed with the limiting mechanism 7 between stop collar 6 and sealing-plug 3.Limitation machine Structure 7 is avoided that in the syringe transportational process that injection rod 2 is driven bar 64 mobile by annular groove 5 by active force, causes the note The case where emitter fails.

As shown in Fig. 2, limiting mechanism 7 includes the limitation bar 71 being integrally formed on 2 side of injection rod, limitation bar 71 is backwards Distance of the end face of injection rod 2 away from 2 axis of injection rod is greater than the internal diameter of injection tube 1, when syringe injection drug is not used, If injection rod 2 is driven sealing-plug 3 mobile by other active forces, injection rod 2 drives limitation bar 71 mobile simultaneously, bar 64 and Before annular groove 5 contradicts, limitation bar 71 is first contradicted with injection tube 1 backwards to the end face of injection connector 11, and limitation bar 71 is stopped to continue direction It is mobile to inject 11 direction of connector.

As shown in Fig. 2, limitation bar 71 has been wholely set thin plate 72 far from the end face of injection rod 2,72 surface of thin plate is provided with Skid resistance strip, skid resistance strip are not drawn into the accompanying drawings.When needing using the syringe, rotation thin plate 72 can drive limitation bar 71 Rotation limit the machine that lifts restrictions after bar 71 is removed from injection rod 2 to rotate and remove limitation bar 71 from injection rod 2 Limitation of the structure 7 to injection rod 2.

As shown in Figure 1, injection rod 2 stretches out outside injection tube 1 and has been wholely set to push note far from one end of sealing-plug 3 Penetrate the mobile push plate 8 of bar 2.

A kind of syringe, the course of work are as follows:

Rotating thin plate 72 drives limitation bar 71 to rotate, and makes to limit bar 71 with the relative rotation of injection rod 2 when limitation bar 71 rotates It is separated with injection rod 2, limitation of the mechanism that lifts restrictions 7 to injection rod 2, pushes push plate 8 to drive injection rod 2 mobile, 2 band of injection rod Dynamic sealing plug 3 is moved along 1 inner cavity of injection tube, and sealing-plug 3 can extrude the drug in injection tube 1 from injection needle 4 when mobile, is infused Drive bar 64 mobile while penetrating the movement of bar 2, as the mobile bar 64 of injection rod 2 is first by the effect of chamfering 12 along limit 6 radial direction of ring moves compression press spring 62, and injection rod 2 continues to move to, and bar 64 passes through annular groove 5, and pressure spring 62 pushes gag lever post 63, Gag lever post 63 drives bar 64 to contact at 5 bottom surface of annular groove, continues to press on injection rod 2 for the remaining drug in injection tube 1 from note Penetrate the release of syringe needle 4.

Embodiment 2

A kind of syringe, difference from Example 1 are, as shown in figure 3, push plate 8 is integrated towards the end face of sealing-plug 3 It is provided with the rotary table 9 for being sheathed on 2 outside of injection rod, 9 bottom surface of rotary table is overlapped with the end face of push plate 8 towards sealing-plug 3.

The setting of rotary table 9 will not influence manpower and push plate 8 pushed to drive injection rod 2 mobile towards injection 11 direction of connector, But if someone needs for injection rod 2 to be directed away from injection 11 direction of connector and pulls injection rod 2 when wanting to reuse the syringe, But the setting of rotary table 9 keeps the pull operation of injection rod 2 difficult, reduces the feelings for pulling injection rod 2 that bar 64 is pulled out to annular groove 5 by force Condition occurs.

2 side of injection rod, which is offered, subtracts power slot 21 between push plate 8 and stop collar 6.Subtracting power slot 21 is with injection rod 2 Axis is the annular groove of axis, subtract power slot 21 along by the section of 2 axis of injection rod to be axisymmetric two with 2 axis of injection rod Triangle.

Structural strength of the injection rod 2 far from 3 one end of sealing-plug can be reduced by subtracting power slot 21, after the syringe uses once, Annular groove 5 limits bar 64, and when someone pulls injection rod 2 by force, injection rod 2 is by subtracting power slot in opening up after certain active force It is broken at 21, reduces the case where pulling injection rod 2 that bar 64 is pulled out annular groove 5 by force and occur, it is ensured that the syringe is only capable of once Property use.

Embodiment 3

A kind of syringe, difference from Example 2 are, as shown in figure 4, the limiting slot 61 of 6 side of stop collar is along limit There are two position ring 6 is circumferentially uniformly distributed.Limiting slot 61 is arranged two, is provided with gag lever post 63 in limiting slot 61, sets on gag lever post 63 It is equipped with bar 64, there are two the bars 64 for stretching out the insertion annular groove 5 of limiting slot 61, the difficulty that bar 64 is extracted out to annular groove 5 is increased, Prevent reusing for the syringe.

Bar 64 is set as the cambered surface 66 with 5 bottom surface of annular groove far from the end face of gag lever post 63.Cambered surface 66 can make bar 64 end faces for protruding into annular groove 5 are contradicted with 5 bottom surface of annular groove completely to be cooperated, to increase 64 side of bar and annular groove 5 along its axis The conflict area of the side in direction further increases the difficulty that bar 64 is extracted out to annular groove 5.

This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but As long as all by the protection of Patent Law in the scope of the claims of the utility model.

Claims (10)

1. a kind of syringe, including injection tube (1), described injection tube (1) one end is provided with injection connector (11), and the injection connects It is connected with injection needle (4) on head (11), the sealing-plug mobile along injection tube (1) inner cavity is provided in the injection tube (1) (3), the injection rod (2) for stretching out injection tube (1) is connected on the sealing-plug (3), it is characterised in that: in the injection tube (1) Side offers annular groove (5) far from one end of injection connector (11), fixed restraining position ring block (6), the limit on the injection rod (2) Ring (6) side opens up own centre line and is placed with pressure along the limiting slot (61) of stop collar (6) radial direction, the limiting slot (61) Spring (62), the limiting slot (61) is interior to be placed with the gag lever post compressed with pressure spring (62) backwards to the end face of limiting slot (61) bottom surface (63), the gag lever post (63) is installed with the bar (64) for stretching out limiting slot (61), the bar far from the end face of pressure spring (62) (64) diameter is less than gag lever post (63) diameter and can be embedded in annular groove (5), and bar (64) outer sheath, which is equipped with, is fixed on limit Limit film (65) on ring (6), the injection tube (1) are provided with chamfering (12) on the inside of the end face far from injection connector (11).

2. a kind of syringe according to claim 1, it is characterised in that: be installed on the injection rod (2) and be located at limit Limiting mechanism (7) between ring (6) and sealing-plug (3).

3. a kind of syringe according to claim 2, it is characterised in that: the limiting mechanism (7) includes being fixed on injection Limitation bar (71) on bar (2) and between stop collar (6) and sealing-plug (3), the limitation bar (71) is backwards to injection rod (2) Distance of the end face away from injection rod (2) axis be greater than injection tube (1) internal diameter.

4. a kind of syringe according to claim 3, it is characterised in that: limitation bar (71) is far from injection rod (2) One end is fixed with thin plate (72).

5. a kind of syringe according to claim 4, it is characterised in that: thin plate (72) surface is provided with tread plate Line.

6. a kind of syringe according to claim 1, it is characterised in that: injection rod (2) side is located at stop collar (6) One end far from sealing-plug (3), which offers, subtracts power slot (21).

7. a kind of syringe according to claim 1, it is characterised in that: the one of the injection rod (2) separate sealing-plug (3) End is installed with push plate (8).

8. a kind of syringe according to claim 7, it is characterised in that: end face of the push plate (8) towards sealing-plug (3) It is installed with the rotary table (9) being sheathed on the outside of injection rod (2), the bottom surface of the rotary table (9) is overlapped with the end face of push plate (8).

9. a kind of syringe according to claim 1, it is characterised in that: the limiting slot (61) of stop collar (6) side It is circumferentially provided with along stop collar (6) multiple.

10. a kind of syringe according to claim 1, it is characterised in that: the bar (64) is far from gag lever post (63) End face is set as and the cambered surface (66) of annular groove (5) bottom surface.