CN209237055U - Disposable syringe - Google Patents

Abstract

The utility model discloses a kind of disposable syringes, belong to medical instruments field, it is intended to provide and is only capable of the simple syringe of expendable structure, its key points of the technical solution are that including injection tube, described injection tube one end is provided with injection connector, injection needle is connected on the injection connector, the sealing-plug moved along injection tube inner chamber is provided in the injection tube, the injection rod for stretching out injection tube is connected on the sealing-plug, the injection tube inner chamber is installed with baffle ring far from one end of injection connector, the baffle ring internal diameter is gradually reduced towards injection connector direction, fixed restraining position ring block on the injection rod, the limit ring diameter is less than injection tube internal diameter and is greater than the minimum diameter of baffle ring, when the sealing-plug contacts at end face of the injection tube close to injection connector, the stop collar is located between baffle ring and injection connector.The utility model solves the problems, such as that existing Disposable, self-destroying syringe construction is complicated.

Description

Disposable syringe

Technical field

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

Background technique

Syringe is most common a kind of medical instrument in medical procedure, in order to avoid using antihygienic syringe and Cause virus cross-infection, in present curative activity gradually with disposable syringe instead of traditional injection Device.But existing many disposable syringes do not have using primary later with regard to the condition of auto-destruct, and make Criminal and some non-normal medical clinics are used in multiple times for number one and by disposable syringe, give people Life security cause great hidden danger.

For this purpose, relevant producer has developed some type self-destroyed disposable syringes, these syringes are after use It can destroy and cannot be reused automatically, this kind of syringe has also obtained everybody approval after launching.

The Chinese invention patent application file that application publication number is CN102319470A can after disclosing a kind of use The syringe of auto-destruct.Including the injection tube connecting with needle stand, the injection needle connecting with self-destruction part, the self-destruction of injection needle is connected Part is placed on needle stand, and rubber plug and hollow pushing cylinder are equipped among injection tube, is equipped with the spring base for being socketed with spring among pushing cylinder And stop bit convex block, self-destruction part lower end, which is equipped with, has contact with, and spring base upper end, which is equipped with, to be had contact with the hook groove hooked, pushing cylinder and spring base Between be socketed with card cylinder, card cylinder top is socketed by rubber plug, and the lower part of card cylinder is withstood in one end of the spring in compressive state.

But this kind of syringe is in the prevalence of the shortcomings that structure is complicated at present.

Utility model content

The purpose of this utility model is to provide a kind of disposable syringes, have structure simple, are only capable of expendable Advantage.

The above-mentioned technical purpose of the utility model has the technical scheme that a kind of disposable injection Device, including injection tube, described injection tube one end is provided with injection connector, is connected with injection needle on the injection connector, described It is provided with the sealing-plug moved along injection tube inner chamber in injection tube, is connected with the injection rod for stretching out injection tube on the sealing-plug, The injection tube inner chamber is installed with baffle ring far from one end of injection connector, and the baffle ring internal diameter gradually subtracts towards injection connector direction Small, fixed restraining position ring block on the injection rod, the limit ring diameter is less than injection tube internal diameter and is greater than the minimum diameter of baffle ring, When the sealing-plug contacts at end face of the injection tube close to injection connector, the stop collar is located between baffle ring and injection connector.

By using above-mentioned technical proposal, the disposable syringe is not before use, sealing-plug contacts at injection tube close to note Penetrate the end face of connector；When carrying out injection work using the syringe, push injection rod that sealing-plug is driven to move along injection tube inner wall, Drug in injection tube is injected, as the mobile stop collar of injection rod is first contradicted with baffle ring, between stop collar and baffle ring Mutual extrusion generates certain deformation, and injection rod continues to move to, and for stop collar by baffle ring, continuing to press on injection rod will be in injection tube Remaining drug is released from injection needle；After stop collar passes through baffle ring, if needing to twitch note when wanting to reuse the syringe Bar is penetrated, stop collar is contradicted backwards to the end face of sealing-plug and baffle ring towards the end face of sealing-plug when injection rod is mobile, baffle ring limitation The movement of stop collar, stops the twitch of injection rod, to realize the disposable of the syringe, avoids repeatedly making for syringe With, while the disposable syringe structure is simple, it is at low cost.

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 stop collar movement by baffle ring, and stop collar is avoided to pass through gear The syringe is caused to scrap after ring.

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 simultaneously limits bar movement, and before stop collar is contradicted with baffle ring, limitation bar is first and injects Cylinder is contradicted backwards to the end face of injection connector, stops limitation bar to continue mobile towards injection connector direction, when needing to use the injection When device, 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, baffle ring limits stop collar；When someone pulls injection rod by force, injection rod is by certain work After firmly in open up subtract at power slot be broken, reduce by stop collar pull out baffle ring and injection connector between the case where occur, it is ensured that should 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 disposable syringe convenient for the movement of promotion injection rod Use.

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 someone and pull injection rod by stop collar by force The case where pulling out between baffle ring and injection connector occurs.

The utility model is further arranged to: the baffle ring is with injection tube axis pair along the section by injection tube axis Two right angled triangles claimed.

By using above-mentioned technical proposal, stop collar passes through baffle ring, baffle ring direction injection connector along the chamfered portion of baffle ring End face stop collar is limited, prevent stop collar from baffle ring and injection connector between extract out.

The utility model is further arranged to: offering annular groove towards the end face of injection connector on the outside of the baffle ring.

By using above-mentioned technical proposal, when the setting of annular groove can make stop collar mobile towards injection connector direction, baffle ring It is easier to generate deformation towards one end of injection connector, passes through baffle ring convenient for stop collar.

In conclusion the utility model has the following beneficial effects:

1, when carrying out injection work using the syringe, push injection rod that sealing-plug is driven to move along injection tube inner wall, it will Drug in injection tube is injected, as the mobile stop collar of injection rod is first contradicted with baffle ring, phase between stop collar and baffle ring It mutually squeezes and generates certain deformation, injection rod continues to move to, and by baffle ring, continuing to press on injection rod will remain stop collar in injection tube Under drug from injection needle release；After stop collar passes through baffle ring, if needing to twitch injection when wanting to reuse the syringe Bar, when injection rod is mobile, stop collar is contradicted backwards to the end face of sealing-plug and baffle ring towards the end face of sealing-plug, baffle ring limitation limit The movement of position ring, stops the twitch of injection rod, to realize the disposable of the syringe, avoids repeatedly making for syringe With, while the disposable syringe structure is simple, it is at low cost；

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 stop collar and baffle ring conflict, limitation bar is first with injection tube backwards to the end of injection connector Face contradicts, and stops limitation bar to continue mobile towards injection connector direction, when needing using the syringe, first will limit bar with hand It is broken down from injection rod, limitation of the mechanism that just can lift restrictions to injection rod；

3, when the setting of annular groove can make stop collar mobile towards injection connector direction, baffle ring towards one end of injection connector compared with It is easy to produce deformation, passes through baffle ring convenient for stop collar.

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 disposable syringe use.

In figure, 1, injection tube；11, connector is injected；2, injection rod；21, subtract power slot；3, sealing-plug；4, injection needle；5, it keeps off Ring；51, annular groove；6, stop collar；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 disposable syringe, as shown in Figure 1, including is injection tube 1 made from material, note using macromolecule polypropylene 1 one end of shooting cylinder is provided with the injection connector 11 being connected to 1 inner cavity of injection tube, injects and is plugged on the outside of connector 11 and injection connector 11 The injection needle 4 of connection.

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 2,1 inner cavity of injection tube has been wholely set baffle ring 5,5 side of baffle ring far from one end of injection connector 11 Face is bonded with 1 inner cavity of injection tube, and 5 internal diameter of baffle ring is gradually reduced towards injection 11 direction of connector.Baffle ring 5 along pass through 1 axis of injection tube The section of line is with two right angled triangles 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 and it is greater than 5 minimum diameter of baffle ring.

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

As shown in Figure 1, pushing injection rod 2 to drive sealing-plug 3 along injection tube 1 when carrying out injection work using the syringe Inner wall is mobile, and the drug in injection tube 1 is injected, as the mobile stop collar 6 of injection rod 2 is first contradicted with baffle ring 5, limit Mutual extrusion generates certain deformation between ring 6 and baffle ring 5, and injection rod 2 continues to move to, and stop collar 6 continues to push away by baffle ring 5 Dynamic injection rod 2 releases the remaining drug in injection tube 1 from injection needle 4.

As shown in Figure 1, after stop collar 6 passes through baffle ring 5, if wanting to need to twitch injection rod 2 when reusing the syringe, When injection rod 2 is mobile, stop collar 6 is contradicted backwards to the end face of sealing-plug 3 and baffle ring 5, and baffle ring 5 limits the movement of stop collar 6, with The twitch of injection rod 2 is stopped to avoid being used for multiple times for syringe to realize the disposable of 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 disposable syringe transportational process that injection rod 2 is driven stop collar 6 is mobile to pass through baffle ring 5 by active force, The case where causing the disposable syringe to fail.

As shown in Figure 1, 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, stop collar 6 Before contradicting with baffle ring 5, 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 court It is mobile to injection 11 direction of connector.

As shown in Figure 1, 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 disposable 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 stop collar 6 mobile while penetrating the movement of bar 2, as the mobile stop collar 6 of injection rod 2 is first and the conflict of baffle ring 5, stop collar 6 Mutual extrusion generates certain deformation between baffle ring 5, and injection rod 2 continues to move to, and stop collar 6 continues to press on note by baffle ring 5 Bar 2 is penetrated to release the remaining drug in injection tube 1 from injection needle 4.

Embodiment 2

A kind of disposable syringe, difference from Example 1 be, as shown in figure 3, push plate 8 is towards the end of sealing-plug 3 Face is wholely set the rotary table 9 for being sheathed on 2 outside of injection rod, and 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 someone and pulls injection rod 2 that stop collar 6 is pulled out baffle ring by force The case where between 5 and injection connector 11, 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, Baffle ring 5 limits stop collar 6, and when someone pulls injection rod 2 by force, injection rod 2 is by Yu Kaishe after certain active force Subtract and be broken at power slot 21, reduces someone and pull injection rod 2 that stop collar 6 is pulled out baffle ring 5 and injects the feelings between connector 11 by force Condition occurs, it is ensured that the syringe is only capable of disposable.

Embodiment 3

A kind of disposable syringe, difference from Example 2 are, as shown in figure 4, what baffle ring 5 and injection tube 1 contradicted The direction of outside towards injection connector 11 offers annular groove 51.The setting of annular groove 51 can make stop collar 6 towards injection 11 side of connector To when movement, one end of baffle ring 5 towards injection connector 11 is easier to generate deformation, passes through baffle ring 5 convenient for stop collar 6.

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 disposable syringe, including injection tube (1), described injection tube (1) one end is provided with injection connector (11), described It is connected with injection needle (4), is provided in the injection tube (1) along the close of injection tube (1) inner cavity movement in injection connector (11) Blocking (3) is connected with the injection rod (2) for stretching out injection tube (1) on the sealing-plug (3), it is characterised in that: the injection tube (1) inner cavity is installed with baffle ring (5) far from one end of injection connector (11), and baffle ring (5) internal diameter is square towards injection connector (11) To being gradually reduced, fixed restraining position ring block (6) on the injection rod (2), stop collar (6) diameter is less than injection tube (1) internal diameter And it is greater than the minimum diameter of baffle ring (5), when the sealing-plug (3) contacts at the end face of injection tube (1) close to injection connector (11), The stop collar (6) is located between baffle ring (5) and injection connector (11).

2. disposable 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 position ring (6) and sealing-plug (3).

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

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

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

6. disposable 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. disposable syringe according to claim 1, it is characterised in that: the injection rod (2) is far from sealing-plug (3) One end is installed with push plate (8).

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

9. disposable syringe according to claim 1, it is characterised in that: baffle ring (5) edge passes through injection tube (1) axis The section of line is with two right angled triangles of injection tube (1) axisymmetrical.

10. disposable syringe according to claim 1, it is characterised in that: towards injection connector on the outside of the baffle ring (5) (11) end face offers annular groove (51).