CN208582810U - Injection device - Google Patents

Abstract

The utility model provides a kind of injection device, is related to the technical field of Medical Devices, and injection device includes extrusion, end cap, adjusts shell and push rod；One end of extrusion with piston for abutting, and the inner wall for edge mixing shell moves up and down；The upper end that shell is set in the outside of extrusion is adjusted, is provided with convex block on outer wall, shell is adjusted and is provided with the through-hole for wearing push rod far from one end of extrusion；The scale slot matched with convex block is provided on the inner wall of end cap, scale slot extends along the axial direction of end cap.Scale slot and convex block are arranged at the top of device, in this way can be convenient for users to observation, and use feel preferable.

Description

Injection device

Technical field

The utility model relates to the technical fields of Medical Devices, more particularly, to a kind of injection device.

Background technique

The shelf-life of some drugs in a liquid state is shorter, and the shelf-life under solid powder state is longer.In order to The shelf-life for extending drug, detachable and interchangeable mixing shell and piston are usually packed into the inside of injection device.Piston setting In the inside of mixing shell, and the identical upper cavity of internal diameter and lower chamber that the inside for mixing shell is divided into sealing, piston It can be moved up and down along the inner wall of mixing shell；It is provided with water in upper cavity, is provided with drug powder in lower chamber；Lower chamber Protrusion cavity is provided on side wall, when injection device pushes piston to be moved at the cavity of protrusion, upper cavity and lower chamber pass through Protrusion cavity is connected to, and the drug powder mixing in the water and lower chamber in upper cavity is in liquid medicine.

For the injection volume of accurate liquid medicine, adjustment structure is usually provided in the middle part of injection device.But it is this Setting does not utilize user to observe, and poor using feel.

Utility model content

The purpose of this utility model is to provide a kind of injection devices, and adjustment structure exists in the prior art to improve Set-up mode does not utilize user to observe, and the technical problem poor using feel.

Injection device provided by the utility model, including extrusion, end cap, adjusting shell and push rod；Extrusion is presented The tubbiness of under shed, one end of extrusion with piston for abutting；Extrusion is used to move up and down along the inner wall of mixing shell；It adjusts Section shell is set in the upper end of the outside of extrusion, and is fixedly connected with extrusion；It adjusts and is provided with convex block on the outer wall of shell, It adjusts shell and is provided with the through-hole for wearing push rod far from one end of extrusion；End cap is arranged in close to adjusting shell in push rod One end is provided with the scale slot matched with convex block on the inner wall of end cap；Scale slot extends along the axial direction of end cap.

Further, the external screw thread matched with the internal screw thread on mixing shell is provided on the outer wall of extrusion.

Further, scale slot is multiple；Multiple scale slots are successively spaced setting, and the extension depth of multiple scale slots is equal It is not identical.

Further, locking hole is provided on end cap；Locking hole is matched with convex block；Locking hole setting is extending depth most The bottom of deep scale slot.

Further, friction protrusion is provided on the outer wall of end cap.

Further, it adjusts and is provided with chimb on the outer wall of shell.

Further, injection device further includes protective shell；Protective shell is used to be located at the lower end of the outside of mixing shell, protection Shell is provided with liquid outlet far from one end of end cap；When piston is moved at the cavity of protrusion, protective shell by proximal cover one end with Shell is adjusted to abut far from one end of end cap.

Further, protective shell is provided with connection screw thread far from one end of end cap；Protective shell passes through connection screw thread and syringe needle It is fixedly connected.

Further, end cap and protective shell are transparent material.

Further, convex block and scale slot are interference fitted.

Injection device provided by the utility model, in use, user is by extrusion along the inner wall of mixing shell It is mobile to the direction of lower chamber, thus push piston mobile to the direction of lower chamber, when piston is moved at the cavity of protrusion, on Water in cavity is flowed into lower chamber by protrusion cavity, is mixed with the drug powder in lower chamber in liquid medicine.Then By the scale slot on end cap and the convex block cooperation on shell is adjusted, end cap is pressed down on, to enable convex block slowly be moved to scale slot Bottom and block, at the same time, push rod wears in through-holes and moves downward simultaneously with end cap, when push rod abuts simultaneously with piston When continuing to press on piston pushing, liquid medicine is extruded from mixing shell, completes quantitative injection.

From the foregoing, it will be observed that the setting of extrusion can enable drug powder quickly mix under aseptic conditions with water, and can It is precisely controlled mixed proportion.The injection volume of accurate liquid medicine is capable of in the setting for adjusting shell, end cap, convex block and scale slot, The setting of push rod can play the role of promotion piston, be injected.Scale slot and convex block are arranged at the top of device, in this way can Convenient for users to observation, and it is preferable using feel.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is injection device provided by the embodiment of the utility model, mixes the main view that shell and piston match；

Fig. 2 is the cross-sectional view in Fig. 1 at A-A；

Fig. 3 is the top view of end cap provided by the embodiment of the utility model；

Fig. 4 is the cross-sectional view in Fig. 3 at B-B；

Fig. 5 is the explosive view of injection device provided by the embodiment of the utility model.

Icon: 1- extrusion；2- mixing shell；3- piston；4- end cap；5- adjusts shell；6- push rod；7- upper cavity；8- Lower chamber；The protrusion 9- cavity；10- convex block；11- through-hole；12- scale slot；13- external screw thread；14- internal screw thread；15- connection screw thread； 16- locking hole；17- friction protrusion；18- chimb；19- protective shell；20- liquid outlet.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.

In the description of the present invention, it should be noted that such as occur term " center ", "upper", "lower", " left side ", " right side ", "vertical", "horizontal", "inner", "outside" etc., indicated by orientation or positional relationship be orientation based on the figure or Positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or member of indication or suggestion meaning Part must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention. In addition, such as there is term " first ", " second ", " third " are used for description purposes only, be not understood to indicate or imply opposite Importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.

Fig. 1 is injection device provided by the embodiment of the utility model, mixes the main view that shell and piston match；Figure 2 be the cross-sectional view at A-A in Fig. 1；Fig. 3 is the top view of end cap provided by the embodiment of the utility model；Fig. 4 is in Fig. 3 at B-B Cross-sectional view；Fig. 5 is the explosive view of injection device provided by the embodiment of the utility model；As shown in Figure 1, Figure 2, Fig. 3, Fig. 4 and Fig. 5 It is shown, injection device provided in this embodiment, including extrusion 1, end cap 4, adjusting shell 5 and push rod 6；Extrusion 1 is presented The tubbiness of under shed, one end of extrusion 1 with piston 3 for abutting；Extrusion 1 is used to along the inner wall of mixing shell 2 move down It is dynamic；The upper end that shell 5 is set in the outside of extrusion 1 is adjusted, and is fixedly connected with extrusion 1；It adjusts and is set on the outer wall of shell 5 It is equipped with convex block 10, shell 5 is adjusted and is provided with the through-hole 11 for wearing push rod 6 far from one end of extrusion 1；The setting of push rod 6 exists End cap 4 is provided with the scale slot 12 matched with convex block 10 on one end for adjusting shell 5, the inner wall of end cap 4；Scale slot 12 Axial direction along end cap 4 extends.

Wherein, plastic material can be selected in extrusion 1, end cap 4, adjusting shell 5 and push rod 6, can reduce manufacture in this way Cost.

Further, push rod 6 can be flexibly connected with end cap 4, and end cap 4 can be rotated along the axial direction of push rod 6.

Further, through-hole 11 can be cross, and shape of the push rod 6 along the section perpendicular to its extending direction is also in ten Font, when push rod 6 is inserted into through-hole 11, can the axial rotation of anti-throw-out lever 6, guarantee the accuracy of device injection.

Injection device provided in this embodiment, in use, user is by extrusion 1 along the inner wall of mixing shell 2 It is mobile to the direction of lower chamber 8, to push piston 3 mobile to the direction of lower chamber 8, when piston 3 is moved at protrusion cavity 9 When, the water in upper cavity 7 is flowed into lower chamber 8 by protrusion cavity 9, is mixed with the drug powder in lower chamber 8 in liquid Drug.Then the scale slot 12 on end cap 4 is cooperated with the convex block 10 adjusted on shell 5, end cap 4 is pressed down on, to enable convex block 10 are slowly moved to the bottom of scale slot 12 and block, at the same time, push rod 6 be threaded through in through-hole 11 and with end cap 4 it is synchronous to Lower movement, when push rod 6 is abutted with piston 3 and continues to press on the pushing of piston 3, liquid medicine is extruded from mixing shell 2, complete At quantitative injection.

From the foregoing, it will be observed that the setting of extrusion 1 can enable drug powder quickly mix under aseptic conditions with water, and can It is precisely controlled mixed proportion.The note of accurate liquid medicine is capable of in the setting for adjusting shell 5, end cap 4, convex block 10 and scale slot 12 The amount of penetrating, the setting of push rod 6 can be played the role of pushing piston 3, be injected.Scale slot and convex block are arranged at the top of device, In this way can be convenient for users to observation, and use feel preferable.

As shown in Figure 2 and Figure 5, on the basis of the above embodiments, further, be provided on the outer wall of extrusion 1 with The external screw thread 13 that internal screw thread 14 on mixing shell 2 matches.

Wherein, the water level in upper cavity 7 is in the inside of tubbiness extrusion 1.

In the present embodiment, in use, since extrusion 1 is fixedly connected with shell 5 is adjusted, user's turn is adjusted Shell 5, so that extrusion 1 be enabled to rotate, the external screw thread 13 on extrusion 1 cooperates with the internal screw thread 14 mixed on shell 2, to enable Extrusion 1 slowly pushes piston 3, so that piston 3 is moved at protrusion cavity 9.The setting being threadedly engaged can enable extrusion 1 slow Slow decline, and can prevent user from accidentally touching in not used situation and adjust shell 5, enable piston 3 mobile, Water is caused to mix with drug powder.

As shown in Figure 3 and Figure 4, on the basis of the above embodiments, further, scale slot 12 is multiple；Multiple scales Slot 12 is successively spaced setting, and the extension depth of multiple scale slots 12 is all different.

Wherein, multiple scale slots 12 are successively spaced setting along the circumferential direction of the inner wall of end cap 4.

Further, it may be provided with arrangement serial number on the inner wall of end cap 4, it is deep that arrangement serial number is corresponding in turn to extension from small to large The scale slot 12 of degree from small to large.In this way can convenient for users to quickly identify it is different extend depth scale slots 12.

In the present embodiment, the extension depth of multiple scale slots 12 is all different.In use, user's rotating end cap 4, it enables convex block 10 correspond to the scale slot 12 of predetermined depth, then pushes end cap 4, guarantee that device injects preset dosage.It is different The scale slot 12 for extending depth has corresponded to the injection volume of different liquid medicines, and user can be divided into according to practical situation The different stages injects the liquid medicine of various dose, to reach injection purpose.

As shown in Figure 1 and Figure 5, on the basis of the above embodiments, further, locking hole 16 is provided on end cap 4；Lock Tieholen 16 is matched with convex block 10；The bottom for extending the most deep scale slot 12 of depth is arranged in locking hole 16.

In the present embodiment, locking hole 16 is provided on end cap 4.In use, in last injection stage, user Convex block 10 is corresponded to and extends the most deep scale slot 12 of depth, then pushes end cap 4 by rotating end cap 4, guarantees that device has injected institute There is liquid medicine, then convex block 10 is stuck in locking hole 16, can not be moved, and such setting can guarantee that device is finished in use Afterwards, the safety and health that device uses will not be guaranteed by secondary use.The setting of locking hole 16 can be convenient for users to observing Whether convex block 10 is fastened in locking hole 16.

As shown in Figure 1 and Figure 5, on the basis of the above embodiments, further, friction is provided on the outer wall of end cap 4 Protrusion 17.

Wherein, the shape of friction protrusion 17 can be a variety of, such as: rectangle, cylindrical type or hemispherical etc..

In the present embodiment, friction protrusion 17 is provided on end cap 4.In use, when user needs rotating end cap 4 When, it is held in hand-tight on 4 outer wall of end cap, hand is contacted with the friction protrusion 17 on 4 outer wall of end cap, is capable of increasing hand and end cap 4 Frictional force between outer wall, convenient for users to rotary end cover 4.

As shown in Figure 1 and Figure 5, on the basis of the above embodiments, further, adjust and be provided on the outer wall of shell 5 Chimb 18.

In the present embodiment, adjusts and be provided with chimb 18 on the outer wall of shell 5.In use, when user needs to turn It is dynamic to adjust shell 5, to holding be held on chimb 18 when mixing water and drug powder, to increase hand and adjust outer Frictional force between shell 5 adjusts shell 5 convenient for users to rear rotation.

As shown in Figure 1, Figure 2 and shown in Fig. 5, on the basis of the above embodiments, further, injection device further includes protection Shell 19；Protective shell 19 is used to be located at the lower end of the outside of mixing shell 2, and protective shell 19 is provided with out liquid far from one end of end cap 4 Mouth 20；When piston 3 is moved at protrusion cavity 9, protective shell 19 is by one end of proximal cover 4 and adjusting shell 5 far from end cap 4 One end abuts.

Wherein, injection device further includes syringe needle, and syringe needle is fixedly connected with one end that protective shell 19 is provided with liquid outlet 20.

Preferably, syringe needle is detachably connected with protective shell 19.When user needs for internal liquid medicine to be divided into repeatedly When injection, replaceable new syringe needle before per injection.

In the present embodiment, injection device further includes protective shell 19.In use, it is mixed can to play protection for protective shell 19 Close the effect of shell 2.Also, when piston 3 is moved at protrusion cavity 9, protective shell 19 is outer by one end of proximal cover 4 and adjusting Shell 5 is abutted far from one end of end cap 4.It can play the role of limit in this way, enable piston 3 fixed in the position, make water and drug Powder is sufficiently mixed.

As shown in Figure 1, Figure 2 and shown in Fig. 5, on the basis of the above embodiments, further, protective shell 19 is far from end cap 4 One end be provided with connection screw thread 15；Protective shell 19 is fixedly connected by connection screw thread 15 with syringe needle.

Wherein, one end of syringe needle should be provided with the screw thread matched with connection screw thread 15.

In the present embodiment, protective shell 19 is provided with connection screw thread 15 far from one end of end cap 4.In use, screw thread The setting of connection can enable syringe needle be removably secured with protective shell 19 and connect, and prevent the secondary use of syringe needle, guarantee injection Safety and health.

On the basis of the above embodiments, further, end cap 4 and protective shell 19 are transparent material.

Wherein, end cap 4 and protective shell 19 can be selected macromolecule polypropylene material and be made.

In the present embodiment, transparent material can be convenient for users to observation water and the mixing situation of drug powder and subsequent The ejection situation of liquid medicine.

On the basis of the above embodiments, further, convex block 10 and scale slot 12 are interference fitted.

In the present embodiment, when convex block 10 and the interference fit of scale slot 12, the setting of interference fit can slow down convex block 10 Movement speed in scale slot 12 guarantees the safety used to slow down the injection speed of liquid medicine.

In addition, can directly block and set into locking hole 16 when convex block 10 is moved to the position of locking hole 16, guarantee locking Effect.

Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type.

Claims (10)

1. a kind of injection device characterized by comprising extrusion, adjusts shell and push rod at end cap；

The extrusion is in the tubbiness of upper and lower opening, and one end of the extrusion with piston for abutting；The extrusion is used for Inner wall along mixing shell moves up and down；The upper end for adjusting shell and being set in the outside of the extrusion, and squeezed with described Casting die is fixedly connected；Convex block, the described adjusting one end of shell far from the extrusion are provided on the outer wall for adjusting shell It is provided with the through-hole for wearing the push rod；The end cap is arranged in close to described one end for adjusting shell, institute in the push rod State the scale slot for being provided on the inner wall of end cap and matching with the convex block；The scale slot prolongs along the axial direction of the end cap It stretches.

2. injection device according to claim 1, which is characterized in that be provided on the outer wall of the extrusion and mixed with described Close the external screw thread that the internal screw thread on shell matches.

3. injection device according to claim 1, which is characterized in that the scale slot is multiple；

Multiple scale slots are successively spaced setting, and the extension depth of multiple scale slots is all different.

4. injection device according to claim 3, which is characterized in that be provided with locking hole on the end cap；

The locking hole is matched with the convex block；The bottom for extending the most deep scale slot of depth is arranged in the locking hole Portion.

5. injection device according to claim 3, which is characterized in that be provided with friction protrusion on the outer wall of the end cap.

6. injection device according to claim 1, which is characterized in that be provided with chimb on the outer wall for adjusting shell.

7. injection device according to claim 1, which is characterized in that further include protective shell；

The protective shell is used to be located at the lower end of the outside of the mixing shell, and the protective shell is set far from one end of the end cap It is equipped with liquid outlet；

When the piston is moved at the cavity of protrusion, the protective shell is remote with the adjusting shell close to one end of the end cap One end from the end cap abuts.

8. injection device according to claim 7, which is characterized in that the protective shell is arranged far from one end of the end cap There is connection screw thread；

The protective shell is fixedly connected by the connection screw thread with syringe needle.

9. injection device according to claim 7, which is characterized in that the end cap and the protective shell are transparent material.

10. injection device according to claim 4, which is characterized in that the convex block and the scale slot are interference fitted.