CN221866921U

CN221866921U - Automatic injector

Info

Publication number: CN221866921U
Application number: CN202323341703.4U
Authority: CN
Inventors: 高鹏涛; 翁晨俊
Original assignee: Zhejiang Senmai Hechuang Medical Technology Co ltd
Current assignee: Zhejiang Senmai Hechuang Medical Technology Co ltd
Filing date: 2023-12-07
Publication date: 2024-10-22
Anticipated expiration: 2033-12-07

Abstract

The present creation discloses an automatic injector, comprising: a pen cap and a front pen holder; the compression mechanism is arranged in the pen cap and the front pen holder; the compression mechanism comprises a rear pen holder. This creation can follow rotatoryly through the stopper on push rod surface, then the track can cancel the spacing to the stopper, through being in compressed state at the inside push rod spring normality of push rod, when canceling the spacing to the stopper, compression push rod spring can promote the push rod and remove, then the push rod can promote the plug and remove, then the inside liquid medicine of plug extrusion cylinder, then the liquid medicine can flow from the syringe needle is inside, get into patient's internal at last, finally through using simple spare part, manufacturing cost has been reduced, and can improve the stability of syringe, the better requirement of meeting customer small simultaneously.

Description

Automatic injector

Technical Field

The creation belongs to medical instrument technical field, specifically is automatic injector.

Background

Auto-injectors are a product of modern medical technology that can greatly alter one's awareness of injection therapy. The design of the medical device is initially to simplify the injection process, reduce the operation difficulty, reduce the pain of patients and better control the dosage and the injection speed of the medicine.

Because of its automation, auto-injectors are popular with many medical practitioners and patients, and the manufacturing process of auto-injectors is very complex, requiring very high precision and quality of the components. This is because the degree of precision of an auto-injector directly affects its performance and use. Each component, whether sized or shaped, requires rigorous testing and inspection to ensure compliance with design requirements and quality standards.

To meet these requirements, the manufacture of auto-injectors typically requires the use of high quality materials that are not only durable enough to maintain their shape and accuracy over multiple uses, but also accurate enough to ensure accurate metering of the injector. These factors put pressure on the manufacturing costs of the auto-injector and may increase the cost of raw materials.

Therefore, in order to ensure the quality and performance of the product during the production process, the use of high quality materials is generally required for precision parts to ensure the durability and accuracy thereof, which may increase the cost of raw materials.

Disclosure of utility model

The present invention is directed to an automatic injector for solving the above-mentioned problems. In order to achieve the above purpose, the present invention provides the following technical scheme: the automatic injector comprises:

a pen cap and a front pen holder;

the compression mechanism is arranged in the pen cap and the front pen holder;

The compression mechanism comprises a rear penholder, the rear penholder is fixedly connected to one end of the front penholder, a rear cover is arranged in the rear penholder, a brake sleeve is movably connected in the rear cover, a brake spring is movably sleeved on the surface of the brake sleeve, and a trigger sleeve positioned in the front penholder is fixedly arranged at one end of the brake sleeve;

The limiting mechanism is arranged in the brake sleeve and comprises a fixed sleeve, the fixed sleeve is rotationally connected in the brake sleeve, a track is arranged on the surface of the fixed sleeve, one end of the fixed sleeve is fixedly provided with a needle cylinder sleeve, and an elastic arm is movably connected in the track;

The trigger mechanism is arranged in the fixed sleeve and comprises a push rod, the push rod is movably connected in the fixed sleeve, a limiting block positioned in the track is movably and fixedly connected on the surface of the push rod, a push rod spring is movably connected in the push rod, and a rubber plug is fixedly arranged at one end of the push rod;

an injection assembly disposed inside the syringe barrel, the injection assembly having a syringe;

The limiting block can rotate under the pushing of the trigger sleeve, the limiting block can move from the left end of the elastic arm to the right end of the elastic arm, and the rubber plug can squeeze liquid medicine in the needle cylinder under the elastic action of the push rod spring.

Preferably, the syringe is fixedly connected to the inside of the syringe sleeve, and the rubber plug of the push rod is positioned in the syringe.

Preferably, one end of the brake spring is fixedly connected with one end of the rear cover, the other end of the brake spring is fixedly connected with the brake sleeve, and the brake spring can be compressed and deformed on the surface of the brake sleeve.

Preferably, the spring arm is of a tilting design.

Preferably, one end of the push rod spring is fixedly connected with one end inside the fixed sleeve, the other end of the push rod spring is fixedly connected with one end of the push rod, and the push rod spring is in a compressed state in a normal state.

Preferably, the fixed sleeve further comprises a backstop buckle, the braking sleeve is extruded by the triggering sleeve to move, the braking spring is compressed, and the limiting block is forced to move rightwards and then is extruded to move forwards by the power storage of the push rod spring, so that the injection of the liquid medicine is completed. The retaining buckle reaches the retaining function after crossing the step, and the trigger sleeve cannot move backwards at the moment. .

Preferably, the trigger sleeve is located inside the front barrel, the trigger sleeve being movable inside the front barrel.

Preferably, the PFS needle cap is arranged in the pen cap, a clamping block is arranged in the pen cap, and one end of the PFS needle cap is contacted with the clamping block.

Preferably, the syringe barrel has a diameter greater than the diameter of the syringe, the syringe barrel being located inside the trigger barrel.

The beneficial effects of this creation are as follows:

This creation is through making trigger sleeve remove, then needle cylinder one end syringe needle can be with patient's skin contact, can get into patient's skin inside then at trigger sleeve removal in-process, can promote brake sleeve and remove, can compress brake spring in the in-process that brake sleeve removed, then the push rod can take place to rotate, then the stopper on push rod surface can follow the rotation, then the track can cancel the spacing to the stopper.

Through being in compression state at the inside push rod spring of push rod, when canceling the spacing to the stopper, compression push rod spring can promote the push rod and remove, then the push rod can promote the plug and remove, then the inside liquid medicine of plug extrusion cylinder, then the liquid medicine can flow out from the syringe needle inside, gets into patient's internal at last.

The production cost is reduced by using the simplified parts, the stability of the injector can be improved, and the requirement of small size of a customer is met better.

Drawings

Fig. 1 is a display view of the present authoring injector.

Fig. 2 is a cross-sectional view of the present writing brush cap.

Fig. 3 is a cross-sectional view of the present inventive trigger sleeve.

Fig. 4 is a cross-sectional view of the present inventive brake sleeve.

Fig. 5 is a sectional view of the present inventive syringe.

Fig. 6 is a schematic view of the present authoring trigger sleeve after triggering.

In the figure: 1. a cap; 2. a front penholder; 3. a trigger sleeve; 4. a syringe sleeve; 5. a fixed sleeve; 6. a brake sleeve; 7. a rear pen holder; 8. a rear cover; 9. a brake spring; 10. a push rod spring; 11. a push rod; 12. a rubber plug; 13. a needle cylinder; 14. PFS needle cap; 15. a track; 16. a limiting block; 17. a spring arm; 18. a clamping block; 19. and the retaining buckle.

Detailed Description

The following description of the technical solutions in the present authoring embodiment will be made clearly and completely with reference to the accompanying drawings in the present authoring embodiment, and it is obvious that the described embodiments are only some embodiments of the present authoring, but not all embodiments. Based on the embodiments in the present creation, all other embodiments that a person of ordinary skill in the art would obtain without making creative efforts fall within the scope of the protection of the present creation.

As shown in fig. 1 to 6, the present embodiment provides an automatic injector, including:

the pen comprises a pen cap 1 and a front pen holder 2, wherein a PFS needle cap 14 is fixedly arranged in the pen cap 1.

The compression mechanism is arranged in the pen cap 1 and the front pen holder 2. The compression mechanism comprises a rear penholder 7, the rear penholder 7 is fixedly connected to one end of the front penholder 2, a rear cover 8 is arranged in the rear penholder 7, a brake sleeve 6 is movably connected in the rear cover 8, a brake spring 9 is movably sleeved on the surface of the brake sleeve 6, and a trigger sleeve 3 positioned in the front penholder 2 is fixedly arranged at one end of the brake sleeve 6.

And a stopper mechanism provided inside the brake sleeve 6. The limiting mechanism comprises a fixed sleeve 5, the fixed sleeve 5 is rotationally connected to the inside of a brake sleeve 6, a track 15 is arranged on the surface of the fixed sleeve 5, and one end of the fixed sleeve 5 is fixedly provided with a needle cylinder sleeve 4.

And a trigger mechanism provided inside the fixed sleeve 5. The triggering mechanism comprises a push rod 11, the push rod 11 is movably connected to the inside of the fixed sleeve 5, a limiting block 16 positioned in a track 15 is movably and fixedly connected to the surface of the push rod 11, a push rod spring 10 is movably connected to the inside of the push rod 11, and a rubber plug 12 is fixedly arranged at one end of the push rod 11.

An injection assembly is disposed inside the syringe sleeve 4 and includes a syringe 13.

The stopper 16 rotates under the pushing of the trigger sleeve 3, the stopper 16 moves from the left end of the spring arm 17 to the right end of the spring arm 17, and the rubber plug 12 presses the liquid medicine inside the syringe 13 under the elastic force of the push rod spring 10.

By pulling out the pen cap 1 by an operator, the PFS needle cap 14 is pulled out in the process of moving the pen cap 1, then the surface of the trigger sleeve 3 is contacted with the skin of a patient, then the trigger sleeve 3 is pushed to move, the needle of the injection assembly enters the skin of the patient in the process of moving the trigger sleeve 3, the brake sleeve 6 is pushed to move in the process of moving the trigger sleeve 3, then the brake sleeve 6 compresses the brake spring 9, the push rod 11 rotates, the limit block 16 moves in the track 15, then the limit block 16 is removed by the track 15, then the compressed push rod spring 10 pushes the push rod 11 to move, and the liquid medicine in the injection assembly is injected into the patient when the push rod 11 moves.

As shown in fig. 5, the syringe 13 is fixedly connected to the inside of the syringe sleeve 4, and the rubber stopper 12 of the push rod 11 is located inside the syringe 13.

Through the design of injection subassembly, when the spacing of stopper 16 is cancelled, push rod spring 10 can promote push rod 11 and stopper 16 and remove, and then push rod 11 can promote plug 12 and remove in the inside of cylinder 13, then plug 12 can promote the liquid medicine removal, then the liquid medicine can get into the patient.

As shown in fig. 3, one end of the brake spring 9 is fixedly connected with one end of the rear cover 8, the other end of the brake spring 9 is fixedly connected with the brake sleeve 6, and the brake spring 9 can be compressed and deformed on the surface of the brake sleeve 6.

Wherein, through the design of brake spring 9, when brake spring 9 removes, because back lid 8 is fixed in the inside of back pen-holder 7 to back lid 8 can regard as the supporting point, and the surface of brake sleeve 6 has a recess, then the other end of brake spring 9 is at recess fixed connection, thereby when brake sleeve 6 removes, can extrude brake spring 9 thereby can make brake spring 9 compress smoothly.

As shown in fig. 5, the inner wall of the brake sleeve 6 is provided with a guide groove, and the retaining sleeve 5 is provided with a retaining buckle 19.

The brake sleeve 6 is extruded by the trigger sleeve 3 to move, the brake spring 9 is compressed, and the limiting block 16 is forced to move rightwards and then is extruded by the push rod spring 10 to move forwards, so that the medicine injection is completed. The stop buckle 19 reaches the stop function after crossing the step, and the trigger sleeve 3 cannot move backwards at the moment, so that the needle is protected.

As shown in fig. 4, by the design of the spring arm 17, since the spring arm 17 is located inside the track 15, when the stopper 16 moves, it contacts the surface of the spring arm 17, and then pushes the spring arm 17 to move, and then the stopper 16 passes through the surface of the spring arm 17, when the stopper 16 moves away from the surface of the spring arm 17, the spring arm 17 is restored, and thus the stopper 16 is blocked from being restored.

As shown in fig. 5, one end of the push rod spring 10 is fixedly connected with one end inside the fixed sleeve 5, the other end of the push rod spring 10 is fixedly connected with one end inside the rear cover 8, and the push rod spring 10 is in a compressed state in a normal state.

Through the design of the push rod spring 10, when the push rod spring 10 is installed, the push rod spring 10 is normally in a compressed state, when the compression of the limiting block 16 is canceled by the rail 15, the push rod spring 10 is compressed to push the push rod 11 to move in the fixed sleeve 5, then the push rod 11 pushes the rubber plug 12 to move, and then the liquid medicine is injected into the skin of a patient.

As shown in fig. 5, the surface of the rubber stopper 12 is fitted to the inside of the cylinder 13, and the rubber stopper 12 can move inside the cylinder 13.

Wherein, through the design of plug 12, when plug 12 moves, because plug 12 laminating the inner wall of cylinder 13 to plug 12 can move in the inside of cylinder 13, plug 12 can extrude the inside medicine of cylinder 13 and get into patient's body through the syringe needle.

As shown in fig. 4, the trigger sleeve 3 is located at the front barrel 2, and the trigger sleeve 3 can move inside the front barrel 2.

Wherein, through the design of trigger sleeve 3, when trigger sleeve 3 does not remove, trigger sleeve 3 can wrap up the syringe needle of syringe 13 one end, and when pushing trigger sleeve 3 and remove, the syringe needle can leak to can prick inside patient's the skin.

As shown in fig. 3, a block 18 is provided inside the pen cap 1, and one end of the pfs cap 14 contacts the block 18.

Wherein, through the design of the PFS needle cap 14, the clamping block 18 can clamp the PFS needle cap 14 when the pen cap 1 moves, so that the PFS needle cap 14 can be pulled out when the pen cap 1 moves.

As shown in fig. 3, the syringe barrel 4 has a larger diameter than the syringe 13, and the syringe barrel 4 is located inside the trigger barrel 3.

By the design of the syringe sleeve 4, the syringe sleeve 4 can support and fix the syringe 13, so that the internal deviation of the syringe 13 during the injection of liquid medicine is avoided.

Working principle and using flow:

when the user uses the injector, the pen cap 1 is firstly required to be pulled out, the PFS needle cap 14 is simultaneously pulled out, then the PFS needle cap 14 is separated from one end of the needle cylinder 13, then one end of the trigger sleeve 3 is contacted with the skin of the patient, then the trigger sleeve 3 is pressed, the trigger sleeve 3 is moved while being pressed, then one end of the needle cylinder 13 is contacted with the skin of the patient, and then the needle enters the skin of the patient.

In the process of moving the trigger sleeve 3, the brake sleeve 6 is pushed to move, the brake spring 9 is compressed in the process of moving the brake sleeve 6, then the push rod 11 rotates, the limiting block 16 on the surface of the push rod 11 rotates, then the rail 15 cancels the limiting of the limiting block 16, and the push rod 11 is pushed to move by compressing the push rod spring 10 when the limiting of the limiting block 16 is canceled through the normal state of the push rod spring 10 in the push rod 11.

Then, the push rod 11 pushes the rubber plug 12 to move, then the rubber plug 12 presses the liquid medicine in the syringe 13, and the liquid medicine flows out of the needle and finally enters the body of the patient. After the injection is completed, the syringe inside the skin of the patient can be pulled out, and when the trigger sleeve 3 is not compressed, the compressed brake spring 9 pushes the brake sleeve 6 and the trigger sleeve 3, and then the trigger sleeve 3 wraps the needle, so that the needle is protected.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the present invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An automatic injector, characterized in that the automatic injector comprises:

A pen cap (1) and a front pen holder (2);

The compression mechanism is arranged in the pen cap (1) and the front pen holder (2), the compression mechanism comprises a rear pen holder (7), the rear pen holder (7) is fixedly connected to one end of the front pen holder (2), a rear cover (8) is arranged in the rear pen holder (7), a braking sleeve (6) is movably connected in the rear cover (8), a braking spring (9) is movably sleeved on the surface of the braking sleeve (6), and a triggering sleeve (3) positioned in the front pen holder (2) is fixedly arranged at one end of the braking sleeve (6);

The limiting mechanism is arranged in the brake sleeve (6), the limiting mechanism comprises a fixed sleeve (5), the fixed sleeve (5) is rotationally connected in the brake sleeve (6), a track (15) is arranged on the surface of the fixed sleeve (5), a needle cylinder sleeve (4) is fixedly arranged at one end of the fixed sleeve (5), and an elastic arm (17) is movably connected in the track (15);

The trigger mechanism is arranged in the fixed sleeve (5), the trigger mechanism comprises a push rod (11), the push rod (11) is movably connected in the fixed sleeve (5), a limiting block (16) positioned in the track (15) is movably and fixedly connected to the surface of the push rod (11), a push rod spring (10) is movably connected in the push rod (11), and a rubber plug (12) is fixedly arranged at one end of the push rod (11); and

An injection assembly disposed inside the syringe sleeve (4) and having a syringe (13);

The limiting block (16) can rotate under the pushing of the trigger sleeve (3), the limiting block (16) can move from the left end of the elastic arm (17) to the right end of the elastic arm (17), and the rubber plug (12) can squeeze liquid medicine in the needle cylinder (13) under the elastic action of the push rod spring (10).

2. An autoinjector according to claim 1, wherein the syringe (13) is fixedly connected to the interior of the syringe sleeve (4), the rubber plug (12) of the push rod (11) being located inside the syringe (13).

3. An autoinjector according to claim 1, wherein one end of the brake spring (9) is fixedly connected to one end of the rear cover (8), the other end of the brake spring (9) is fixedly connected to the brake sleeve (6), and the brake spring (9) is capable of compression deformation at the surface of the brake sleeve (6).

4. Auto-injector according to claim 1, characterized in that the spring arm (17) is of an inclined design.

5. The automatic injector according to claim 1, characterized in that one end of the push rod spring (10) is fixedly connected with one end inside the fixed sleeve (5), the other end of the push rod spring (10) is fixedly connected with one end of the push rod (11), and the push rod spring (10) is in a compressed state in a normal state.

6. The automatic injector according to claim 1, wherein the fixing sleeve (5) further comprises a retaining buckle (19), the braking sleeve (6) is extruded and moved by the triggering sleeve (3), the braking spring (9) is compressed, the limiting block (16) is forced to move rightwards and then is extruded and moved forwards by the pushing rod spring (10) under the accumulation force, the injection of liquid medicine is completed, and the retaining buckle (19) reaches a retaining function after crossing a step, and at the moment, the triggering sleeve (3) cannot move backwards.

7. The automatic injector according to claim 1, characterized in that said trigger sleeve (3) is located inside said front barrel (2), said trigger sleeve (3) being movable inside said front barrel (2).

8. The automatic injector according to claim 1, characterized in that the pen cap (1) is internally provided with a PFS needle cap (14), a clamping block (18) is arranged in the pen cap (1), and one end of the PFS needle cap (14) is contacted with the clamping block (18).

9. An autoinjector according to claim 1, wherein the syringe sleeve (4) has a larger diameter than the syringe (13), the syringe sleeve (4) being located inside the trigger sleeve (3).