CN116271336B

CN116271336B - Disposable adjustable injection device

Info

Publication number: CN116271336B
Application number: CN202310565777.1A
Authority: CN
Inventors: 熊长艳; 何四现; 李化顺
Original assignee: Suzhou Jiashu Medical Technology Co ltd
Current assignee: Suzhou Jiashu Medical Technology Co ltd
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-11-10
Anticipated expiration: 2043-05-19
Also published as: CN116271336A

Abstract

The invention relates to a disposable adjustable injection device, which sequentially comprises an upper injection assembly and a lower injection assembly from top to bottom, wherein the upper injection assembly comprises an upper cylinder body, a button assembly, a knob assembly, a dial and a power clutch mechanism, the lower injection assembly comprises a bottle assembly, a lower cylinder body and a needle head, the needle head is arranged at the bottom of the bottle assembly, and the lower cylinder body is arranged at the outer side of the bottle assembly; the top of the upper cylinder body is provided with a knob assembly, the top of the knob assembly is provided with a button assembly, the knob assembly is connected with a power rod assembly on the inner side, and the power clutch mechanism comprises a power rod assembly, a screw rod assembly and a screw rod knob. The invention can automatically adjust the dosage through the knob component and the dial, can realize the up-and-down movement of the piston by the knob component and the power clutch mechanism and by means of the energy storage and release of the second spring, thereby completing the injection process, and has simple operation and convenient use.

Description

Disposable adjustable injection device

Technical Field

The invention relates to the technical field related to medical appliances, in particular to a disposable adjustable injection device.

Background

Injection pen products are classified into repeatable injection pens and disposable injection pens. The reusable pen cartridge is reusable, thus the structure is more complex than a disposable injection pen. The disposable injection pen is a 'medicine and machinery integrated' product, a pen body and a medicine bin are not detachable, and the disposable injection pen on the market at present can be divided into an adjustable type, a quantitative type and the like, and also can be divided into an automatic type and a manual type.

Through mass search, the prior art with publication number of CN110269977A discloses a dose-adjustable injection pen, which comprises: a bracket; a first cover; an adjustment sleeve; a locking sleeve; a first elastic member; a scale drum; a limit knob; a screw rod; the button component is arranged at the other end of the adjusting sleeve and used for rotating or pressing the adjusting sleeve, when the button component rotates, the locking sleeve, the first elastic piece, the limiting knob, the adjusting sleeve and the scale drum are driven to synchronously rotate so as to adjust injection dosage, and when the button component presses, the locking sleeve, the first elastic piece, the screw rod, the limiting knob, the adjusting sleeve and the scale drum are driven to synchronously rotate so as to push the screw rod to axially move for injection. According to the dose adjustable injection pen provided by the embodiment of the invention, the scale cylinder is sleeved on the locking sleeve and matched with the screw rod and the limit knob through the button assembly, so that the dose adjustable injection pen is simple in structure, convenient to adjust the dose and easy to inject.

In summary, the existing disposable injection pen is either disposable injection or manual dose adjustment, which is inconvenient to operate.

In view of the above-mentioned drawbacks, the present inventors have actively studied and innovated to create a disposable adjustable injection device, which has a more industrially useful value.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a disposable adjustable injection device.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the disposable adjustable injection device comprises an upper injection assembly and a lower injection assembly from top to bottom in sequence, wherein the upper injection assembly comprises an upper cylinder body, a button assembly, a knob assembly, a dial and a power clutch mechanism, the lower injection assembly comprises a bottle assembly, a lower cylinder body and a needle head, the needle head is arranged at the bottom of the bottle assembly, and the lower cylinder body is arranged at the outer side of the bottle assembly;

the top of the upper cylinder body is provided with a knob assembly, the top of the knob assembly is provided with a button assembly, a first spring is connected between the button assembly and the knob assembly, the dial is positioned on the inner side of the upper cylinder body, the knob assembly is connected with a power rod assembly on the inner side, the power clutch mechanism comprises a power rod assembly, a screw rod assembly and a screw rod knob, the top of the power rod assembly is connected with the button assembly above, the power rod assembly is connected with the dial on the outer side, the inner side of the power rod assembly is provided with the screw rod assembly, the screw rod knob is arranged on the outer side of the bottom close to the screw rod assembly, and a second spring is connected between the knob assembly and the power rod assembly;

the bottle assembly sequentially comprises a bottle support and a bottle body from outside to inside, and a bottle support cover is arranged between the lower part of the screw knob and the top of the bottle support;

the knob assembly can drive the dial below to spirally rotate along the upper cylinder from top to bottom, the button assembly can drive the power rod assembly below to move from top to bottom, and the power rod assembly can move downwards until being combined with the screw knob below, and at the moment, the screw assembly is combined with the screw knob below.

As a further improvement of the invention, the top of the upper cylinder body is provided with an upper cylinder clamping edge;

the button assembly comprises a button, and at least one button claw is arranged in the middle of the inner side of the bottom of the button;

the knob assembly comprises a knob, a bidirectional stop frame and a torsion spring bracket, wherein the torsion spring bracket sequentially comprises a torsion spring upper support frame and a torsion spring lower clamping edge from top to bottom, the knob support frame is arranged near the top of the knob, a knob upper sleeve is arranged at the middle position on the knob support frame, and a torsion spring bracket sleeve is arranged at the middle position on the torsion spring upper support frame;

the power rod assembly sequentially comprises a power rod and a power sleeve from inside to outside; the top of the power rod is provided with a power rod sleeve, the button claw can be clamped with the power rod sleeve below, the bottom of the power rod is provided with at least one power rod claw, the bottom of the power rod, which is close to the power sleeve, is provided with a power sleeve clamping groove which is clamped with the power rod claw, and a power sleeve tooth block at the bottom of the power sleeve can be meshed with an external tooth block of the screw knob on the outer side of the screw knob;

the screw assembly comprises a screw and a piston from top to bottom in sequence, and the bottom of the screw can extend into the bottle body below and is connected with the piston;

a screw knob sleeve is arranged in the middle of the screw knob, and the screw can be meshed with an internal tooth block of the screw knob in the screw knob sleeve;

at least one bottle rack cover claw is arranged on the bottle rack cover and can be clamped with the screw knob above;

the middle part on the bottle rack cover is provided with a bottle rack cover sleeve, and the screw is meshed with the bottle rack cover tooth block in the bottle rack cover sleeve.

As a further improvement of the invention, at least one upper cylinder top slot and at least one upper cylinder clamping groove are arranged on the upper cylinder clamping edge, at least one upper cylinder bottom slot is arranged at the bottom of the upper cylinder body, the upper cylinder top slot is clamped with a torsion spring support rib on the lower clamping edge of the torsion spring, the upper cylinder clamping groove is clamped with a torsion spring support claw on the lower clamping edge of the torsion spring, and the upper cylinder bottom slot can be used for avoiding the position of a bottle support clamping ring on the bottle support.

As a further improvement of the invention, a plurality of thread-shaped upper cylinder thread bulges are sequentially arranged on the inner side of the upper cylinder body from top to bottom, a thread groove on the outer side of the dial can be connected with the upper cylinder thread bulges, at least one dial clamping groove is arranged on the inner side of the dial, and a power sleeve rib connected with the dial clamping groove is arranged on the outer side of the power sleeve close to the top.

As a further improvement of the invention, at least one knob clamping groove is arranged on the knob support frame, a knob clamping ring is arranged at the bottom of the knob support frame, a torsion spring upper support frame is arranged between the knob clamping ring and the knob, a bidirectional stop claw which is clamped with the knob clamping groove is arranged on the bidirectional stop frame, a plurality of torsion spring support tooth blocks are arranged on the inner side of the torsion spring upper support frame along the circumferential direction, and a bidirectional stop cantilever beam on the bidirectional stop frame can be connected with the torsion spring support tooth blocks.

As a further improvement of the invention, a torsional spring bracket cantilever beam is arranged on the lower clamping edge of the torsional spring, and the torsional spring bracket cantilever beam can be contacted with the top of the dial below.

As a further improvement of the invention, at least one button inner rib is arranged on the inner side of the bottom of the button, and at least one knob rib is arranged on the outer side of the upper sleeve of the knob.

As a further improvement of the invention, an upper cylinder limiting clamping edge is arranged at a position, close to the bottom, of the inner side of the upper cylinder body, and at least one upper cylinder limiting rib is arranged at the bottom of the upper cylinder limiting clamping edge and can be contacted with a bottle rack cover below; at least one bottle rack cover lug is arranged on the bottle rack cover sleeve, and the bottom of the screw knob sleeve can be contacted with the bottle rack cover lug below; the bottom of bottle holder lid is provided with at least one bottle holder lid rib, and bottle holder lid rib can contact with the top of bottle body below.

As a further improvement of the invention, a plurality of knob tooth blocks are arranged on the inner side of the bottom of the upper sleeve of the knob along the circumferential direction, and a power rod tooth block meshed with the knob tooth block is arranged on the outer side of the power rod close to the top.

By means of the scheme, the invention has at least the following advantages:

1. the dosage can be automatically regulated through the knob assembly and the dial, and the up-and-down movement of the piston can be realized through the knob assembly and the power clutch mechanism by means of energy storage and release of the second spring, so that the injection process is finished, the operation is simple, and the use is convenient;

2. when the bidirectional stop cantilever rotates in the forward direction or the reverse direction, the bidirectional stop cantilever can play a certain role in stopping and limiting through friction with the torsional spring bracket tooth block, so that the stability and the controllability during rotation are improved, and a click sound can be generated;

3. the bidirectional stop frame is positioned in the knob clamping ring, and the knob clamping ring can push the bidirectional stop cantilever Liang Huiwei in the rotating process, so that the reverse rotation is smoother;

4. the torsional spring support and the dial are arranged on the upper pen container, the dial moves axially through the thread groove, and a gap is reserved between the thread groove and the thread, so that the axial movement precision of the dial can be influenced. The torsional spring bracket cantilever beam is designed on the torsional spring bracket, so that the torsional spring bracket cantilever beam is pressed on the dial, the gap between the threaded groove of the dial and the threaded bulge of the upper cylinder is reduced, and the accuracy of the axial movement of the dial can be improved;

5. the dial clamping groove at the inner side of the dial is matched with the power sleeve rib at the outer side of the power sleeve, so that the gap between the dial and the power sleeve can be reduced, further shaking of the dial is reduced, and the display precision is improved;

6. the bottle rack cover below can be supported and limited by the upper cylinder limiting ribs, so that the radial position of the bottle rack cover can be controlled;

7. the bottom of the screw knob sleeve is contacted with the bottle rack cover convex block at the top of the bottle rack cover sleeve, so that the contact performance between the screw knob sleeve and the bottle rack cover sleeve can be improved;

8. the bottle body is installed in the bottle support, gaps are reserved in the radial direction, the bottle support is easy to shake, four bottle support cover ribs with slopes are designed on the bottle support cover, and therefore the gaps between the bottle body and the bottle support can be corrected, the axial center of the bottle body deviating from the bottle support is reduced, and the bottle body is not easy to shake.

The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a disposable adjustable injection device of the present invention;

FIG. 2 is a schematic view of the internal structure of FIG. 1;

FIG. 3 is a schematic view of the upper injection assembly of FIG. 2;

FIG. 4 is a schematic view of the lower injection assembly of FIG. 2;

FIG. 5 is a schematic view of the structure of the upper cylinder of FIG. 3;

FIG. 6 is a schematic view of the internal structure of FIG. 5;

FIG. 7 is a schematic view of the button assembly of FIG. 3;

FIG. 8 is a schematic view of an exploded construction of the knob assembly of FIG. 3;

FIG. 9 is a schematic view of the structure of one side of the knob in FIG. 8;

FIG. 10 is a schematic view of the other side of the knob of FIG. 8;

FIG. 11 is a schematic structural view of the torsion spring bracket of FIG. 8;

FIG. 12 is a schematic view of the structure of the bi-directional stopper of FIG. 8;

FIG. 13 is a schematic view of the dial of FIG. 3;

FIG. 14 is a schematic view of the power lever assembly of FIG. 3;

FIG. 15 is a schematic view of the power lever of FIG. 14;

FIG. 16 is a schematic view of the power sleeve of FIG. 14;

FIG. 17 is a schematic view of the screw assembly and stopper of FIG. 3;

FIG. 18 is a schematic view of the stopper of FIG. 17;

FIG. 19 is a schematic view of the screw knob of FIG. 3;

FIG. 20 is a schematic view of the structure of one side of the bottle cap of FIG. 3;

FIG. 21 is a schematic view of the other side of the lid of the bottle holder of FIG. 3;

fig. 22 is a schematic view of the construction of the bottle assembly of fig. 4.

In the drawings, the meaning of each reference numeral is as follows.

Upper injection assembly 1, lower injection assembly 2, upper cylinder 3, button assembly 4, knob assembly 5, dial 6, power lever assembly 7, screw assembly 8, stopper 9, screw knob 10, bottle holder cover 11, bottle assembly 12, lower cylinder 13, needle 14, upper cylinder rim 15, upper cylinder top slot 16, upper cylinder rim 17, upper cylinder bottom slot 18, upper cylinder threaded protrusion 19, upper cylinder rim 20, upper cylinder rim 21, button 22, button claw 23, button inner rib 24, knob 25, bi-directional stopper 26, torsion spring bracket 27, knob support 28, knob upper sleeve 29, knob neck 30, knob rib 31, knob clip 32, knob tooth 33, torsion spring upper support 34, torsion spring lower rim 35, torsion spring support tooth 36 torsion spring bracket sleeve 37, torsion spring bracket jaw 38, torsion spring bracket cantilever beam 39, torsion spring bracket rib 40, bi-directional stop cantilever beam 41, bi-directional stop jaw 42, dial detent 43, power lever 44, power sleeve 45, power lever tooth block 46, power lever sleeve 47, power lever jaw 48, power sleeve rib 49, power sleeve tooth block 50, power sleeve detent 51, screw 52, piston 53, stopper rib 54, stopper tooth block 55, screw knob sleeve 56, screw knob outer tooth block 57, screw knob inner tooth block 58, bottle rack cover sleeve 59, bottle rack cover tooth block 60, bottle rack cover bump 61, bottle rack cover jaw 62, bottle rack cover rib 63, bottle rack 64, bottle body 65, bottle rack snap ring 66.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.

Examples

As shown in fig. 1 to 22,

the disposable adjustable injection device sequentially comprises an upper injection assembly 1 and a lower injection assembly 2 from top to bottom, wherein the upper injection assembly 1 comprises an upper cylinder 3, a button assembly 4, a knob assembly 5, a dial 6 and a power clutch mechanism, the lower injection assembly 2 comprises a bottle assembly 12, a lower cylinder 13 and a needle 14, the needle 14 is arranged at the bottom of the bottle assembly 12, and the lower cylinder 13 is arranged at the outer side of the bottle assembly 12;

the top of the upper cylinder body 3 is provided with a knob assembly 5, the top of the knob assembly 5 is provided with a button assembly 4, a first spring is connected between the button assembly 4 and the knob assembly 5, a dial 6 is positioned at the inner side of the upper cylinder body 3, the knob assembly 5 is connected with a power rod assembly 7 at the inner side, a power clutch mechanism comprises a power rod assembly 7, a screw rod assembly 8 and a screw rod knob 10, the top of the power rod assembly 7 is connected with the button assembly 4 above, the power rod assembly 7 is connected with the dial 6 at the outer side, the inner side of the power rod assembly 7 is provided with the screw rod assembly 8, a screw rod knob 10 is arranged at the outer side close to the bottom of the screw rod assembly 8, and a second spring is connected between the knob assembly 5 and the power rod assembly 7;

the bottle assembly 12 sequentially comprises a bottle bracket 64 and a bottle body 65 from outside to inside, and a bottle bracket cover 11 is arranged between the lower part of the screw knob 10 and the top of the bottle bracket 64;

the knob assembly 5 can drive the lower dial 6 to spirally rotate along the upper cylinder 3 from top to bottom, the button assembly 4 can drive the lower power rod assembly 7 to downwardly move from top to bottom, and the power rod assembly 7 can downwardly move until being combined with the lower screw knob 10, at the moment, the screw assembly 8 is combined with the lower screw knob 10.

Preferably, the top of the upper cylinder body 3 is provided with an upper cylinder clamping edge 15;

the button assembly 4 comprises a button 22, and at least one button claw 23 is arranged at the middle position inside the bottom of the button 22;

the knob assembly 5 comprises a knob 25, a bidirectional stop frame 26 and a torsion spring bracket 27, wherein the torsion spring bracket 27 sequentially comprises a torsion spring upper support frame 34 and a torsion spring lower clamping edge 35 from top to bottom, a knob support frame 28 is arranged near the top of the knob 25, a knob upper sleeve 29 is arranged at the middle position on the knob support frame 28, and a torsion spring bracket sleeve 37 is arranged at the middle position on the torsion spring upper support frame 34;

the power rod assembly 7 comprises a power rod 44 and a power sleeve 45 from inside to outside in sequence; the top of the power rod 44 is provided with a power rod sleeve 47, the button claw 23 can be clamped with the power rod sleeve 47 below, the bottom of the power rod 44 is provided with at least one power rod claw 48, the bottom of the power sleeve 45 is provided with a power sleeve clamping groove 51 which is clamped with the power rod claw 48, and a power sleeve tooth block 50 at the bottom of the power sleeve 45 can be meshed with a screw knob external tooth block 57 at the outer side of the screw knob 10;

the screw assembly 8 sequentially comprises a screw 52 and a piston 53 from top to bottom, and the bottom of the screw 52 can extend into the bottle body 65 below and be connected with the piston 53;

a screw knob sleeve 56 is arranged in the middle of the screw knob 10, and the screw 52 can be meshed with a screw knob internal tooth block 58 in the screw knob sleeve 56;

at least one bottle rack cover claw 62 is arranged on the bottle rack cover 11, and the bottle rack cover claw 62 can be clamped with the screw knob 10 above;

the middle part of the bottle holder cover 11 is provided with a bottle holder cover sleeve 59, and the screw 52 is meshed with a bottle holder cover tooth block 60 in the bottle holder cover sleeve 59.

Preferably, at least one upper cylinder top slot 16 and at least one upper cylinder clamping groove 17 are arranged on the upper cylinder clamping edge 15, at least one upper cylinder bottom slot 18 is arranged at the bottom of the upper cylinder body 3, the upper cylinder top slot 16 is clamped with the torsion spring support ribs 40 on the torsion spring lower clamping edge 35, the upper cylinder clamping groove 17 is clamped with the torsion spring support clamping claws 38 on the torsion spring lower clamping edge 35, and the upper cylinder bottom slot 18 can avoid the position of the bottle support clamping ring 66 on the bottle support 64.

Preferably, a plurality of thread-shaped upper cylinder thread bulges 19 are sequentially arranged on the inner side of the upper cylinder body 3 from top to bottom, a thread groove on the outer side of the dial 6 can be connected with the upper cylinder thread bulges 19, at least one dial clamping groove 43 is arranged on the inner side of the dial 6, and a power sleeve rib 49 connected with the dial clamping groove 43 is arranged on the outer side, close to the top, of the power sleeve 45. The dial clamping groove 43 on the inner side of the dial 6 is matched with the power sleeve rib 49 on the outer side of the power sleeve 45, so that a gap between the dial 6 and the power sleeve 45 can be reduced, shaking of the dial 6 is further reduced, and display accuracy is improved.

Preferably, the screw 52 positioned at the inner side of the power sleeve 45 is also provided with a limiter 9, the outer side of the limiter 9 is arranged in a limiting groove arranged at the inner side of the power sleeve 45 along the vertical direction through a limiter rib 54, and a limiter tooth block 55 at the inner side of the limiter 9 is meshed with the screw 52.

Preferably, at least one knob clamping groove 30 is formed in the knob support 28, a knob clamping ring 32 is arranged at the bottom of the knob support 28, a torsion spring upper support 34 is mounted between the knob clamping ring 32 and the knob 25, a bidirectional stop claw 42 clamped with the knob clamping groove 30 is arranged on the bidirectional stop support 26, a plurality of torsion spring support tooth blocks 36 are arranged on the inner side of the torsion spring upper support 34 along the circumferential direction, and a bidirectional stop cantilever 41 on the bidirectional stop support 26 can be connected with the torsion spring support tooth blocks 36.

Preferably, the torsion spring lower clamping edge 35 is provided with a torsion spring bracket cantilever beam 39, and the torsion spring bracket cantilever beam 39 can be contacted with the top of the dial 6 below. The torsion spring bracket 27 and the dial 6 are arranged on the upper cylinder body 3, the dial 6 moves axially through a thread groove, and a gap exists between the thread groove and the thread, so that the axial movement precision of the dial 6 can be influenced. The torsional spring bracket cantilever beam 39 is designed on the torsional spring bracket 27, so that the torsional spring bracket cantilever beam 39 is pressed on the dial 6, the gap between the dial thread groove and the upper cylinder thread bulge 19 is reduced, and the accuracy of the axial movement of the dial 6 can be improved.

Preferably, at least one button inner rib 24 is provided on the inside of the bottom of the button 22, and at least one knob rib 31 is provided on the outside of the knob upper sleeve 29.

Preferably, an upper cylinder limiting clamping edge 20 is arranged at a position, close to the bottom, of the inner side of the upper cylinder body 3, at least one upper cylinder limiting rib 21 is arranged at the bottom of the upper cylinder limiting clamping edge 20, and the upper cylinder limiting rib 21 can be in contact with the bottle rack cover 11 below. The bottle rack cover 11 below can be supported and limited by the upper cylinder limiting ribs 21, so that the radial position of the bottle rack cover 11 is controllable.

The bottle cap sleeve 59 is provided with at least one bottle cap projection 61, and the bottom of the screw knob sleeve 56 is in contact with the bottle cap projection 61 below. By contacting the bottom of the screw knob sleeve 56 with the shelf cap projection 61 on top of the shelf cap sleeve 59, the contact performance between the screw knob sleeve 56 and the shelf cap sleeve 59 can be improved.

The bottom of the bottle holder cover 11 is provided with at least one bottle holder cover rib 63, and the bottle holder cover rib 63 can be in contact with the top of the bottle body 65 below. The bottle body 65 is installed in the bottle support 64, and is easy to shake in the radial direction, and through designing four bottle support cover ribs 63 with slopes on the bottle support cover 11, the gap between the bottle body 65 and the bottle support 64 can be corrected, so that the axial center of the bottle body 65 deviating from the bottle support 64 is reduced, and the bottle body 65 is not easy to shake.

Preferably, a plurality of knob tooth blocks 33 are arranged on the inner side of the bottom of the upper knob sleeve 29 along the circumferential direction, and a power rod tooth block 46 meshed with the knob tooth block 33 is arranged on the outer side of the power rod 44 close to the top.

The positional relationship of the main structural components of the invention is briefly described:

referring to fig. 1 and 2, a disposable adjustable injection device of the present invention is mainly composed of an upper injection assembly 1 and a lower injection assembly 2.

As shown in fig. 3, the upper injection assembly 1 mainly comprises an upper cylinder 3, a button assembly 4, a knob assembly 5, a dial 6, a power rod assembly 7, a screw assembly 8, a limiter 9, a screw knob 10 and a bottle holder cover 11.

As shown in fig. 4, the lower injection assembly 2 basically includes a vial assembly 12, a lower barrel 13 and a needle 14.

The needle 14 is installed to the bottom of bottle subassembly 12, and lower barrel 13 is installed to the outside of bottle subassembly 12, and bottle subassembly 12 includes bottle support 64 and bottle body 65 in proper order from outside to inside, and bottle body 65 is located bottle support 64, and piston 53 is located bottle body 65.

The screw thread groove on the outer side of the dial 6 is connected with the upper cylinder screw thread bulge 19, the dial clamping groove 43 on the inner side of the dial 6 is connected with the power sleeve rib 49 on the power sleeve 45, the power sleeve 45 is internally provided with the power rod 44 along the vertical direction, the power rod clamping jaw 48 at the bottom of the power rod 44 is connected with the power sleeve clamping groove 51 at the bottom of the power sleeve 45, the power rod 44 is internally provided with the screw 52 along the vertical direction, the power sleeve tooth block 50 at the bottom of the power sleeve 45 can be meshed with the screw knob external tooth block 57 on the outer side of the screw knob 10, the combination of a clutch mechanism is realized, the screw knob 10 is positioned above the bottle rack cover 11, the screw 52 can sequentially penetrate through the screw knob sleeve 56 and the bottle rack cover sleeve 59 and then is connected with the piston 53 positioned in the bottle rack body 65, and the piston 53 can be driven to move along the vertical direction in the bottle body 65 through the screw 52.

The knob assembly 5 includes a knob 25, a bi-directional stopper 26 and a torsion spring bracket 27, the torsion spring bracket 27 being mounted on the top of the upper cylinder 3, the bi-directional stopper 26 being located between the knob 25 and the torsion spring bracket 27. During forward or reverse rotation, the bidirectional stop cantilever beam 41 can play a certain role in stopping and limiting by friction with the torsion spring bracket tooth block 36, so that the stability and controllability during rotation are improved, and a click can be generated. The bidirectional stop frame 26 is located in the knob snap ring 32, and in the process of rotating, the knob snap ring 32 can push the bidirectional stop cantilever 41 to return, so that the reverse rotation is smoother.

The button assembly 4 comprises a button 22, the button 22 is arranged at the top of a knob 25, a first spring is arranged between the button 22 and the top of the knob 25, a button claw 23 at the bottom of the button 22 is clamped with a power rod sleeve 47 below, and a power rod tooth block 46 on a power rod 44 is meshed with a knob tooth block 33 of a sleeve 29 on the knob. The second spring is located between the power sleeve 45 and the power rod 44, the top of the second spring is hung on the torsion spring bracket 27, and the bottom of the second spring is hung on the bottom of the power sleeve 45.

The limiter 9 is arranged on the screw, and the limiter 9 can be contacted with the top of the screw knob 10 below when moving to the bottommost part, so that the displacement stroke of the screw in the radial direction can be effectively limited, and the device is simple and convenient.

The implementation principle of the invention is briefly described:

by rotating the knob clockwise, the kinetic energy of the rotation of the knob assembly 5 is stored in the second spring (i.e., torsion spring). When the knob assembly 5 is rotated, the dial 6 rotates together, but the screw assembly 8 does not rotate by the principle of separation of the clutch mechanism (the power lever assembly 7 and the screw knob 10 constitute the clutch mechanism). Then pressing the top button assembly 4 again, the cooperation of the power rod assembly 7 and the screw knob 10 can be opened, namely, the switch of the second spring is opened, the kinetic energy stored in the second spring is released, the screw assembly 8 and the dial 6 are driven to rotate through the clutch mechanism, the piston 53 is pushed, and then the liquid medicine is injected.

1. Energy storage and release principle of the second spring:

1) The fixing mode of the second spring is as follows:

one end of the top of the second spring is hung on the torsion spring bracket 27, and one end of the bottom of the second spring is hung on the bottom of the power sleeve 45.

2) Energy storage principle of second spring

When the knob assembly 5 rotates, the structure of the knob tooth block 33 and the power rod tooth block 46 drives the power rod 44 to rotate, so that the second spring is driven to rotate, and energy storage of the second spring is realized through the two steps.

3) Principle of releasing energy by a second spring

When the button 22 is pressed, the power rod 44 moves along with the button 22 along the axial direction to one end of the bottle body 65, so that the power sleeve tooth block 50 on the power rod 44 is meshed with the screw knob external tooth block 57 on the outer side of the screw knob 10, namely, the energy storage switch of the second spring is turned on, and the energy storage of the second spring is released.

2. Dial part structure (principle of realizing adjustable function)

1) The dial 6 can be matched with the upper cylinder body 3 through the thread groove on the outer side and the upper cylinder thread bulge 19.

2) When the power rod 44 rotates together with the knob assembly 5, the dial 6 is driven to rotate together, so that the change of scales is realized, and the adjustable function is realized.

3. Clutch switch part structure (clutch mechanism is formed by the power rod component 7 and the screw knob 10)

1) Normally, the clutch mechanism is separated under the action of the button spring (first spring) and the torsion spring (second spring), and the screw 52 does not rotate and does not push the piston 53 no matter how the knob assembly 5 rotates.

2) When the button assembly 4 is pressed, the power rod 44 moves along with the axial movement, the power lock matched with the power rod moves towards the bottom of the screw rod, at the moment, the power sleeve tooth block 50 at the bottom of the power sleeve 45 can be meshed with the screw rod knob external tooth block 57 at the outer side on the screw rod knob 10 to drive the screw rod 52 to rotate together, so that the piston 53 is pushed to move, and the injection function is realized.

The invention can automatically adjust the dosage through the knob component and the dial, can realize the up-and-down movement of the piston by the knob component and the power clutch mechanism and by means of the energy storage and release of the second spring, thereby completing the injection process, and has simple operation and convenient use.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected: can be mechanically or electrically connected: can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. The disposable adjustable injection device comprises an upper injection assembly (1) and a lower injection assembly (2) from top to bottom, wherein the upper injection assembly (1) comprises an upper cylinder body (3), a button assembly (4), a knob assembly (5), a dial (6) and a power clutch mechanism; the lower injection assembly (2) comprises a bottle assembly (12), a lower cylinder (13) and a needle (14), the needle (14) is arranged at the bottom of the bottle assembly (12), and the lower cylinder (13) is arranged at the outer side of the bottle assembly (12); the method is characterized in that:

the top of the upper cylinder body (3) is provided with a knob assembly (5), and the top of the upper cylinder body (3) is provided with an upper cylinder clamping edge (15); the top of the knob assembly (5) is provided with a button assembly (4), and a first spring is connected between the button assembly (4) and the knob assembly (5); the dial (6) is positioned at the inner side of the upper cylinder body (3), and the knob assembly (5) is connected with the power rod assembly (7) at the inner side;

the power clutch mechanism comprises a power rod assembly (7), a screw rod assembly (8) and a screw rod knob (10), wherein the top of the power rod assembly (7) is connected with a button assembly (4) above, the power rod assembly (7) is connected with a dial (6) on the outer side, the screw rod assembly (8) is installed on the inner side of the power rod assembly (7), the screw rod knob (10) is installed on the outer side, close to the bottom of the screw rod assembly (8), of the power rod assembly, and a second spring is connected between the knob assembly (5) and the power rod assembly (7); the knob assembly (5) can drive the lower dial (6) to spirally rotate from top to bottom along the upper cylinder (3), the button assembly (4) can drive the lower power rod assembly (7) to downwardly move from top to bottom, the power rod assembly (7) can downwardly move until being combined with the lower screw knob (10), and at the moment, the screw assembly (8) is combined with the lower screw knob (10); the button assembly (4) comprises a button (22), and at least one button claw (23) is arranged at the middle position inside the bottom of the button (22); the knob assembly (5) comprises a knob (25), a bidirectional stop frame (26) and a torsion spring support (27), the torsion spring support (27) sequentially comprises a torsion spring upper support frame (34) and a torsion spring lower clamping edge (35) from top to bottom, a knob support frame (28) is arranged near the top of the knob (25), a knob upper sleeve (29) is arranged at the middle position on the knob support frame (28), a plurality of knob tooth blocks (33) are arranged at the inner side of the bottom of the knob upper sleeve (29) along the circumferential direction, a power rod tooth block (46) meshed with the knob tooth block (33) is arranged at the outer side of a power rod (44) near the top, and a torsion spring support sleeve (37) is arranged at the middle position on the torsion spring upper support frame (34); the power rod assembly (7) sequentially comprises a power rod (44) and a power sleeve (45) from inside to outside; the top of the power rod (44) is provided with a power rod sleeve (47), the button claw (23) can be clamped with the power rod sleeve (47) below, the bottom of the power rod (44) is provided with at least one power rod claw (48), the bottom of the power sleeve (45) is provided with a power sleeve clamping groove (51) which is clamped with the power rod claw (48), and a power sleeve tooth block (50) at the bottom of the power sleeve (45) can be meshed with a screw knob external tooth block (57) at the outer side on the screw knob (10); the screw assembly (8) sequentially comprises a screw (52) and a piston (53) from top to bottom, and the bottom of the screw (52) can extend into the bottle body (65) below and is connected with the piston (53); a screw knob sleeve (56) is arranged at the middle position on the screw knob (10), and the screw (52) can be meshed with a screw knob internal tooth block (58) in the screw knob sleeve (56); a plurality of thread-shaped upper cylinder thread bulges (19) are sequentially arranged on the inner side of the upper cylinder body (3) from top to bottom, and a thread groove on the outer side of the dial (6) can be connected with the upper cylinder thread bulges (19); the inner side of the dial (6) is provided with at least one dial clamping groove (43), the outer side, close to the top, of the power sleeve (45) is provided with a power sleeve rib (49) connected with the dial clamping groove (43), the lower clamping edge (35) of the torsion spring is provided with a torsion spring support cantilever beam (39), the torsion spring support cantilever beam (39) can be contacted with the top of the dial (6) below, the torsion spring support (27) and the dial (6) are arranged on the upper cylinder body (3), the dial (6) axially moves through the thread groove, the torsion spring support cantilever beam (39) is pressed on the dial (6), and the gap between the thread groove of the dial and the thread bulge (19) of the upper cylinder is reduced;

the bottle assembly (12) sequentially comprises a bottle support (64) and a bottle body (65) from outside to inside, and a bottle support cover (11) is arranged between the lower part of the screw knob (10) and the top of the bottle support (64); at least one bottle rack cover claw (62) is arranged on the bottle rack cover (11), and the bottle rack cover claw (62) can be clamped with the screw knob (10) above; the middle part of the bottle rack cover (11) is provided with a bottle rack cover sleeve (59), and the screw (52) is meshed with a bottle rack cover tooth block (60) in the bottle rack cover sleeve (59);

one end of the top of the second spring is hung on the torsion spring bracket (27), one end of the bottom of the second spring is hung at the bottom of the power sleeve (45), and when the knob assembly (5) rotates, the structure of the knob tooth block (33) and the power rod tooth block (46) drives the power rod (44) to rotate, so that the second spring is driven to rotate, and energy storage of the second spring is realized; when the button (22) is pressed, the power rod (44) moves along with the button (22) towards one end of the bottle body (65) along the axial direction, so that the power sleeve tooth block (50) on the power rod (44) is meshed with the screw knob external tooth block (57) on the outer side of the screw knob (10), and the energy storage of the second spring is released; when the power rod (44) rotates along with the knob assembly (5), the dial (6) is driven to rotate along with the knob assembly (5) to change scales, when the button assembly (4) is pressed, the power rod (44) moves along with the axial direction, a power lock matched with the power rod also moves towards the bottom of the screw rod, a power sleeve tooth block (50) at the bottom of the power sleeve (45) is meshed with a screw knob external tooth block (57) at the outer side on the screw knob (10), the screw rod (52) is driven to rotate along with the power rod, and therefore the piston (53) is pushed to move, and an injection function is achieved.

2. A disposable adjustable injection device according to claim 1, wherein the upper cartridge clamping edge (15) is provided with at least one upper cartridge top slot (16) and at least one upper cartridge clamping groove (17), and the bottom of the upper cartridge (3) is provided with at least one upper cartridge bottom slot (18);

the upper cylinder top slot (16) is connected with the torsion spring support ribs (40) on the torsion spring lower clamping edge (35) in a clamping mode, the upper cylinder clamping groove (17) is connected with the torsion spring support clamping jaw (38) on the torsion spring lower clamping edge (35) in a clamping mode, and the upper cylinder bottom slot (18) can be used for avoiding the bottle support clamping ring (66) on the bottle support (64).

3. A disposable adjustable injection device according to claim 1, wherein the knob support (28) is provided with at least one knob clamping groove (30), the bottom of the knob support (28) is provided with a knob clamping ring (32), and the torsion spring upper support (34) is arranged between the knob clamping ring (32) and the knob (25);

the bidirectional stop rack (26) is provided with a bidirectional stop claw (42) clamped with the knob clamping groove (30), the inner side of the torsional spring upper support frame (34) is provided with a plurality of torsional spring support tooth blocks (36) along the circumferential direction, and the bidirectional stop cantilever beam (41) on the bidirectional stop rack (26) can be connected with the torsional spring support tooth blocks (36).

4. A disposable adjustable injection device according to claim 1, characterized in that the bottom inside of the button (22) is provided with at least one button inner rib (24) and the outside of the upper knob sleeve (29) is provided with at least one knob rib (31).

5. A disposable adjustable injection device according to claim 1, wherein an upper barrel limit clamping edge (20) is arranged at a position, close to the bottom, inside the upper barrel (3), and at least one upper barrel limit rib (21) is arranged at the bottom of the upper barrel limit clamping edge (20), and the upper barrel limit rib (21) can be in contact with a bottle rack cover (11) below;

at least one bottle rack cover lug (61) is arranged on the bottle rack cover sleeve (59), and the bottom of the screw knob sleeve (56) can be contacted with the bottle rack cover lug (61) below;

the bottom of bottle holder lid (11) is provided with at least one bottle holder lid rib (63), bottle holder lid rib (63) can contact with the top of bottle body (65) of below.