CN109125858B

CN109125858B - Push device and syringe

Info

Publication number: CN109125858B
Application number: CN201811119820.7A
Authority: CN
Inventors: 楚耀强; 林林; 刘鹏; 周伟; 周子航; 林奕航
Original assignee: Kunshan Haerxi Medical Devices Co ltd
Current assignee: Kunshan Haerxi Medical Devices Co ltd
Priority date: 2018-09-25
Filing date: 2018-09-25
Publication date: 2023-08-08
Anticipated expiration: 2038-09-25
Also published as: CN109125858A

Abstract

The embodiment of the invention provides a pushing device and an injector, wherein one end of a pushing device shell is a pushing end, and the other end of the pushing device shell is an adjusting end; the outer surface of the scale ring is provided with push quantity scale marks, and the outer surface of the scale ring is in threaded connection with the inner wall of the shell; the adjusting knob is arranged at the adjusting end of the shell and is fixedly connected with the scale ring, and the scale ring rotates along with the rotation of the adjusting knob; the adjusting transmission sleeve is arranged in the shell in a penetrating way, one end of the adjusting transmission sleeve is connected with the adjusting knob, and the adjusting transmission sleeve rotates along with the rotation of the adjusting knob; the excircle of the push rod is in threaded connection with the adjusting transmission sleeve; the pushing end of the shell is also provided with a rotation stopping structure for limiting the push rod to rotate; the push button is arranged at the adjusting end of the shell and can move towards the push end along with the pressing of the push button; the locking piece is installed at the regulation end of casing, and push button and regulation transmission cover are connected to the locking piece, when pressing push button, if the push rod receives external force to stop to push the end and remove, and the locking piece restriction is adjusted the transmission cover and is removed to the push end.

Description

Push device and syringe

Technical Field

The invention relates to the technical field of medical instruments, in particular to a pushing device and a syringe.

Background

Taking a syringe for diabetics as an example: for diabetics, their blood glucose level is important, timing care and recording is required, and in order to reduce fluctuations in the patient's blood glucose level, drug control is required. Artificial insulin is a well-known drug for lowering blood glucose level, which must be administered parenterally to be effective in humans; typically, the most common way to administer artificial insulin to diabetics is by subcutaneous injection. At present, when the injector used for subcutaneous injection is in injection operation, if the push rod at the push end is subjected to larger resistance to stop pushing out the medicament, the adjusting transmission sleeve rotationally connected with the push rod can continue pushing out, so that the actual pushed out medicament dose is inconsistent with the preset medicament dose, namely, the actual pushed out medicament dose is smaller than the preset medicament dose, and the treatment effect is influenced.

Disclosure of Invention

In order to solve the technical problems, the embodiment of the invention provides a pushing device and an injector with the pushing device.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

the embodiment of the invention provides a pushing device, which comprises a shell, a scale ring, an adjusting knob, an adjusting transmission sleeve, a push rod, a pushing button, a locking piece and a rotation stopping structure, wherein the shell is provided with a plurality of grooves; wherein:

one end of the shell is a pushing end connected with the pushing container, and the other end of the shell is an adjusting end for adjusting pushing quantity;

the outer surface of the scale ring is provided with push quantity scale marks, the scale ring is arranged on the inner wall of the shell, and the scale ring can move relative to the shell along the axial direction;

the adjusting knob is arranged at the adjusting end of the shell and is fixedly connected with the scale ring, and the scale ring rotates along with the rotation of the adjusting knob;

the adjusting transmission sleeve is arranged in the shell in a penetrating way, one end of the adjusting transmission sleeve is connected with the adjusting knob, and the adjusting transmission sleeve rotates along with the rotation of the adjusting knob;

one end of the push rod is arranged in the adjusting transmission sleeve in a penetrating way, the other end of the push rod extends out of the pushing end of the shell, and the outer edge of the push rod is in threaded connection with the adjusting transmission sleeve;

the rotation stopping structure is arranged at the pushing end of the shell to limit the push rod to rotate;

the push button is arranged at the adjusting end of the shell, and the adjusting transmission sleeve, the push rod and the scale ring move towards the push end along with the pressing of the push button;

the locking piece is installed the regulation end of casing, the locking piece is connected push button with adjust the transmission cover, when pressing push button, if the push rod receives external force to stop to push the end and remove, the locking piece restriction adjust the transmission cover to push the end and remove.

In the above scheme, a first end face tooth is arranged at one end of the adjusting transmission sleeve, a second end face tooth matched with the first end face tooth is arranged on the adjusting knob, and the adjusting knob drives the adjusting transmission sleeve to rotate through the first end face tooth and the second end face tooth;

the one end of adjusting the drive sleeve still is equipped with the third facial tooth, the locking piece be equipped with third facial tooth assorted fourth facial tooth, first facial tooth with the second facial tooth breaks away from along with adjust knob's press, push button passes through third facial tooth with fourth facial tooth drives adjust the drive sleeve to the push end removes.

In the above scheme, the locking piece includes locking portion and elastic part, the fourth terminal surface tooth sets up on the locking portion, the elastic part is connected locking portion with adjust the transmission cover so that the third terminal surface tooth with the fourth terminal surface tooth is when not pressing push button keeps non-meshing state.

In the above scheme, the adjusting knob is provided with an inner hole, and the locking piece is arranged in the inner hole;

the push button comprises a cylinder and a cap edge, wherein the cylinder can penetrate through the inner hole of the adjusting knob and is in contact with the locking piece, and the diameter of the cap edge is larger than that of the inner hole of the adjusting knob.

In the above scheme, the adjusting transmission sleeve comprises an elastic piece which enables the first end face tooth and the second end face tooth to keep an engaged state when the push button is not pressed.

In the scheme, the adjusting transmission sleeve further comprises a push rod nut and an adjusting sleeve, wherein the push rod nut is provided with internal threads matched with the push rod; the adjusting sleeve is sleeved on the push rod nut, can move along the axis of the push rod nut and can drive the push rod nut to rotate; the adjusting sleeve is arranged on the scale ring in a penetrating mode, and one end of the adjusting sleeve is provided with the first end face teeth.

In the above scheme, the inner wall of the adjusting sleeve is provided with at least one first groove extending axially, and the push rod nut is provided with a first convex rib corresponding to the first groove; or (b)

The inner wall of the adjusting sleeve is provided with at least one first convex rib extending in the axial direction, and the push rod nut is provided with a first groove corresponding to the first convex rib.

In the above scheme, the pushing device further comprises an adjusting and stabilizing ring, the adjusting and stabilizing ring is sleeved on the adjusting transmission sleeve, and the adjusting and stabilizing ring and the adjusting transmission sleeve are axially fixed; the outer surface of the adjusting stabilizing ring is in threaded connection with the inner wall of the shell; the adjustment stabilizing ring rotates with the rotation of the scale ring.

In the scheme, the outer surface of the scale ring is in threaded connection with the inner wall of the shell.

In the above scheme, the shell comprises a cylindrical shell and a combined functional ring fixed on the inner wall of the shell, wherein the combined functional ring is provided with a first internal thread and a second internal thread, and the scale ring is provided with a first external thread matched with the first internal thread; the adjusting stabilizing ring is provided with a second external thread matched with the second internal thread;

the combined functional ring is further provided with a first boss extending inwards from the inner wall of the shell in the radial direction, one side of the first boss can limit the moving distance of the adjusting stabilizing ring to the adjusting end, and the other side of the first boss can limit the moving distance of the scale ring to the pushing end.

In the above scheme, the casing includes from the radial inwards second boss that extends of shell inner wall, the second boss is located the propelling movement end, the one end of adjusting the stabilizing ring can the butt second boss, the other end of adjusting the stabilizing ring stretches into in the scale ring.

In the above scheme, the shell is positioned at the pushing end and is also provided with an annular blocking structure, the inner wall of the blocking structure is provided with a plurality of tooth grooves extending axially, and the tooth grooves are uniformly arranged at intervals along the circumferential direction of the blocking structure;

the adjusting transmission sleeve is arranged at one end of the pushing end, at least one elastic supporting leg is arranged at one end of the adjusting transmission sleeve, and teeth matched with the tooth grooves are arranged on the elastic supporting legs.

In the above scheme, the blocking structure is located the pushing end and is further provided with a third boss extending radially inwards from the inner wall of the blocking structure, and one end of the push rod nut can be abutted with the third boss.

In the above scheme, be equipped with the tread and at least one link up on the circumference of push rod the flat potential face of push rod whole length, the tread with adjust transmission cover threaded connection, the axial of structure that ends changes is equipped with cross-section shape with flat potential face assorted ends and changes the hole.

In the above scheme, the rotation stopping structure and the shell are of an integral structure, or the rotation stopping structure and the shell are of a mutually independent split structure.

Embodiments of the present invention provide a syringe comprising a push container and a push device as described in any of the preceding claims, the push container being mounted on the housing.

The embodiment of the invention provides a pushing device and an injector with the pushing device, when an adjusting knob is rotated, the adjusting knob can drive a scale ring to rotate, and scales on the scale ring are used for displaying the medicine amount absorbed by the pushing device; when the adjusting knob is rotated to adjust the pushing dosage, the scale ring, the adjusting transmission sleeve and the locking piece all move from the pushing end to the adjusting end. When pushing the push button, the push button can push the adjusting transmission sleeve, the push rod and the scale ring to move towards the pushing end, and after the medicament is pushed, the scale ring is zeroed. If the push rod is stopped to move towards the pushing end by external force in the pushing process, the locking piece can limit the adjusting transmission sleeve to move towards the pushing end, so that synchronous movement and synchronous stopping of the adjusting transmission sleeve of the push rod are realized, and the accuracy of pushing dosage is ensured.

Drawings

FIG. 1 is a cross-sectional view of an alternative assembly configuration of a pusher in an embodiment of the present invention;

FIG. 2 is a schematic view of an alternative configuration of the adjustment end of the push device of FIG. 1 in adjusting the push dose;

FIG. 3 is a schematic view of an alternative configuration of the dial ring of FIG. 1;

FIG. 4 is an axial cross-sectional view of the dial ring of FIG. 3;

FIG. 5 is a schematic perspective view of an alternative embodiment of the adjustment knob of FIG. 1;

FIG. 6 is a schematic view of the structure of one end face of the adjusting knob of FIG. 5;

FIG. 7 is a schematic view of another end face of the adjustment knob of FIG. 5;

FIG. 8 is a schematic view of an alternative construction of the adjustment sleeve of FIG. 1;

FIG. 9 is a schematic view of an alternative construction of the push rod nut of FIG. 1;

FIG. 10 is a schematic view of an alternative configuration of the adjustment stabilizer ring of FIG. 1;

FIG. 11 is a side view of the adjustment stabilizing ring of FIG. 10;

FIG. 12 is a cross-sectional view taken along the direction A-A in FIG. 11;

FIG. 13 is a schematic view of an alternative configuration of the stop rotor of FIG. 1;

FIG. 14 is an axial cross-sectional view of the push button of FIG. 1;

FIG. 15 is a schematic view of an alternative construction of the housing of FIG. 1;

FIG. 16 is an axial cross-sectional view of FIG. 14;

FIG. 17 is a schematic view of an alternative construction of the pushrod of FIG. 1;

FIG. 18 is a schematic view of an alternative structure of the spin-off structure of FIG. 1.

Reference numerals: a housing 100; a first ring 110; a first boss 111; resetting the rotation stopping sleeve 120; a rotation stopping hole 121; a second ring 130; a second boss 140; a cover 150; a window 160; a blocking structure 170; tooth slots 171; a third boss 180; an adjusting knob 200; a second face tooth 210; a through slot 220; knurling 230; an inner bore 240; pushing the button 300; a locking member 400; a locking portion 410; fourth face teeth 411; a claw 412; a rotation stopping groove 413; an elastic part 420; adjusting the drive sleeve 500; an adjustment sleeve 510; first face teeth 511; third face teeth 512; a bump 513; a push rod nut 520; a first bead 521; a stop flange 522; a resilient leg 523; teeth 524; an elastic member 530; a slider 540; a push rod 600; a flat surface 610; a thread face 620; adjusting the stabilization ring 700; a first cavity 710; a second cavity 720; a second external thread 730; adjust the stable bad step 740; a second bead 750; a limit claw 760; a scale ring 800; a first external thread 810; graduation marks 820; zero graduation mark 821; a second groove 830; elastic bumps 840; pushing the container 900; a medicament bottle 910; a medicament cartridge 920; a drug vial stopper 930.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments obtained by a person skilled in the art based on the described embodiments of the invention fall within the scope of protection of the invention.

The pushing device of the embodiment of the invention is used for pushing liquid medicament to diabetics or other patients, and at the moment, the pushing operation refers to injection operation. Those skilled in the art will appreciate that the present invention can be used in other applications where quantitative pushing of other materials is desired.

The pushing device in the embodiment of the present invention needs to be used in cooperation with the pushing container 900, and when the pushing device is used for pushing a medicament, the pushing device and the pushing container can be combined into a syringe, and in the embodiment of the present invention, the syringe is taken as an example to describe the pushing device in detail, wherein the working process of the syringe at least includes installing the pushing container 900, adjusting the pushing dosage and pushing, and for simplicity of expression, the pushing device and its components are described in the direction shown in fig. 1, i.e. the upper part and the lower part refer to the upper part and the lower part in fig. 1. The specific working principle is as follows:

1) The pushing container 900 is installed, and the pushing container 900 is connected to an end of the push rod 600, and in particular, the pushing container 900 may be a cartridge including a medicine bottle 910 and a medicine cartridge 920, and the medicine bottle 910 is installed in the medicine cartridge 920. The push container 900 may be integral, i.e. the cartridge 920 and the vial 910 may be integral, and may be directly mounted to the housing, and the push container 900 may be mounted to the housing by a snap fit or threaded connection, etc. in a manner known to those skilled in the art. The push is directly discarded and is disposable; or the medicine container 920 is assembled and then the medicine bottle 910 is assembled, the push rod 600 can extend into the medicine bottle 910 to push, the medicine bottle 910 is discarded after pushing, and the medicine container 920 can be reused;

2) The adjustment push dosage, rotate adjust knob 200, make adjust knob 200 spiral rise to the regulation end of casing, adjust knob 200's rotation can drive the rotation of adjusting transmission cover 500, because adjusting transmission cover 500 is threaded connection with push rod 600, but the rotation of push rod 600 is limited by the rotation stopping structure, and push rod 600's head has withstood the medicine bottle stopper 930 of medicine bottle 910, and the resistance is great, and push rod 600 is unable to move axially to the regulation end of casing, namely: unable to rotate and move, the adjustment drive sleeve 500 will spiral up towards the adjustment end of the housing, such that the adjustment drive sleeve 500 will generate a distance D with respect to the housing due to the spiral up, see distance D in fig. 2, which determines the adjusted push dose; meanwhile, the adjusting knob 200 is fixedly connected with the scale ring 800, so that the scale ring 800 also rises in a spiral manner, the moving distance of the scale ring 800 and the moving distance of the adjusting transmission sleeve 500 have a certain proportional relationship, and the outer wall of the scale ring 800 is provided with a pushing object scale mark, so that the pushing amount can be known through the window 160 arranged on the shell;

in order to make the pushing amount more accurate, the pitch of the screw thread between the scale ring 800 and the housing is larger than the pitch of the screw thread between the adjusting transmission sleeve 500 and the push rod 600, so that the moving distance of the adjusting transmission sleeve 500 can be amplified by the scale ring 800, and the pushing amount scale mark is more accurate; in order to prevent the adjustment transmission sleeve 500 from sliding downwards under the action of gravity after the adjustment of the adjustment transmission sleeve 500 is stopped, i.e. after the adjustment knob 200, the adjustment transmission sleeve 500 and the scale ring 800 stop rotating, the clearance between the threaded connection of the adjustment transmission sleeve 500 and the push rod 600 is in a certain range, and if the clearance is too large, free sliding is easy to occur;

3) Pushing, namely pushing the pushing button 300, wherein the pushing button 300 pushes the adjusting transmission sleeve 500 to move towards the pushing end of the shell through the locking piece 400, the adjusting transmission sleeve 500 is in threaded connection with the push rod 600, and the push rod 600 is pushed to move until one end of the adjusting transmission sleeve 500, which faces towards the pushing end of the shell, abuts against the shell, and the pushing of the set medicine amount is completed; meanwhile, when the push button 300 moves downwards, the push button also presses the adjusting knob 200, so as to drive the scale ring 800 to spirally descend, and the scale is zeroed.

The embodiment of the invention is mainly used for diabetics, but those skilled in the art can understand that the invention can also be used for other patients, and the description is omitted here.

The pushing device provided by the embodiment of the invention comprises a shell, a scale ring 800, an adjusting knob 200, an adjusting transmission sleeve 500, a push rod 600, a pushing button 300 and a locking piece 400; wherein: one end of the shell is a pushing end connected with the pushing container 900, and the other end is an adjusting end for adjusting the pushing dosage; the outer surface of the scale ring 800 is provided with push quantity scale marks, the scale ring 800 is mounted on the inner wall of the shell, and the scale ring 800 can move relative to the shell along the axial direction, and specifically, the connection mode of the scale ring 800 and the inner wall of the shell comprises but is not limited to threaded connection; the adjusting knob 200 is installed at the adjusting end of the housing and is fixedly connected with the scale ring 800, and the scale ring 800 rotates along with the rotation of the adjusting knob 200; the adjusting transmission sleeve 500 is arranged in the shell in a penetrating way, one end of the adjusting transmission sleeve is connected with the adjusting knob 200, and the adjusting transmission sleeve 500 rotates along with the rotation of the adjusting knob 200; one end of the push rod 600 is arranged in the adjusting transmission sleeve 500 in a penetrating way, the other end of the push rod extends out of the pushing end of the shell, and the outer edge of the push rod 600 is in threaded connection with the adjusting transmission sleeve 500; the rotation stopping structure is arranged at the pushing end of the shell to limit the push rod 600 to rotate; the push button 300 is arranged at the adjusting end of the shell, and the adjusting transmission sleeve 500, the push rod 600 and the scale ring 800 move towards the push end along with the pressing of the push button 300; the locking piece 400 is installed at the adjusting end of the shell, the locking piece 400 is connected with the push button 300 and the adjusting transmission sleeve 500, and when the push button 300 is pressed, if the push rod 600 is stopped to move towards the push end by external force, the locking piece 400 limits the adjusting transmission sleeve 500 to move towards the push end.

As shown in fig. 1, a push container 900 is mounted to the push end of the housing, and a detachable cover 150 is mounted to the outside of the push container 900. The push container 900 includes a medicament bottle 910, a medicament cartridge 920, and a medicament bottle stopper 930, the medicament bottle stopper 930 being connected to one end of the push rod 600. The adjusting end of the shell is provided with the adjusting knob 200, the adjusting knob 200 is fixedly connected with the scale ring 800, the scale ring 800 is in threaded connection with the inner wall of the shell, when the push dose is adjusted, the adjusting knob 200 is rotated, and the adjusting knob 200 can move together with the scale ring 800 in an upward rotating mode. The amount by which the dial ring 800 is raised represents the adjusted dose, which is indicated by the graduation marks 820 provided on the dial ring 800 and is displayed through the window 160 provided in the upper part of the housing. The adjustment knob 200 may be integrally formed with the dial ring 800, but for convenience of assembly, the dial ring 800 and the adjustment knob 200 are physically separable and independent components.

The dial ring 800 may be coupled to the adjustment knob 200 in a dovetail fashion. Specifically, as shown in fig. 3 and 6, the zero graduation mark 821 of the graduation ring 800 is at the upper end. The upper end of the scale ring 800 is provided with a plurality of axial elastic lugs 840, and the adjusting knob 200 is provided with a through groove 220 matched with the elastic lugs 840. In the illustrated embodiment of the present invention, the elastic protrusions 840 are in the shape of hooks, three in total, and are uniformly distributed in the axial direction; correspondingly, the through slots 220 are also provided with three; after the elastic protruding block 840 extends into the through groove 220, the upper end of the elastic protruding block 840 clamps the through groove 220 to complete the fixed connection; further, the lower end of the through groove 220 is provided with a taper for the elastic bump 840 to extend into. It should be appreciated that the resilient protrusions 840 and the through slots 220 are not limited to the above configuration.

The scale ring 800 is provided with a first external thread 810 at the outside thereof, and a first internal thread matched with the first external thread 810 is provided at the inside of the housing, as shown in fig. 1 and 2, the first external thread 810 is a thread groove, the first internal thread is a thread protrusion, and the profiles of the first external thread 810 and the first internal thread may be rectangular, trapezoidal, zigzag or other shapes. It will be appreciated that in other embodiments, the first external threads 810 may be threaded bosses and the first internal threads may be threaded slots. As shown in fig. 5, the outer surface of the adjusting knob 200 is provided with knurls 230, and the type of knurls 230 may be designed according to need, without limitation. The knurling 230 not only can increase friction force, facilitate rotation adjustment, but also can increase decorative feel.

Specifically, for ease of processing, the adjustment drive sleeve 500 is not integrally formed, but rather includes a push rod nut 520 and an adjustment sleeve 510, see fig. 8 and 9. The push rod nut 520 is provided with an internal thread matched with the push rod 600, the adjusting sleeve 510 is sleeved on the push rod nut 520, and the adjusting sleeve 510 can move along the axis of the push rod nut 520 and can drive the push rod nut 520 to rotate.

Specifically, the adjusting sleeve 510 is sleeved on the upper portion of the push rod nut 520, at least one first groove extending axially is formed in the inner wall of the adjusting sleeve 510, and a first rib 521 corresponding to the first groove is formed on the push rod nut 520. The first ribs 521 and the first grooves cooperate to transmit torque, so that the adjusting sleeve 510 can drive the push rod nut 520 to rotate, and the axial movement of the adjusting sleeve 510 and the push rod nut 520 based on each other is not influenced.

In the embodiment of the invention, four splines of the first grooves and the first ribs 521 are adopted, so that the torque transmission is stable, and the processing is relatively convenient. It will be appreciated that the number of grooves and ribs may be shaped and is not limited to the form shown in this embodiment; in other embodiments, at least one first rib extending axially may be disposed on the inner wall of the adjusting sleeve 510, and a first groove corresponding to the first rib is disposed on the push rod nut 520. .

As shown in fig. 5 to 8, one end of the adjusting sleeve 510 is provided with a first end tooth 511, the adjusting knob 200 is provided with a second end tooth 210 matched with the first end tooth 511, and the adjusting knob 200 drives the adjusting transmission sleeve 500 to rotate through the first end tooth 511 and the second end tooth 210.

The first end teeth 511 are disposed on the outer circumference of the adjusting sleeve 510, the second end teeth 210 engaged with the first end teeth 511 are disposed on the inner side of the adjusting knob 200, the second end teeth 210 are disposed continuously on the inner side of the adjusting knob 200, and the first end teeth 511 and the second end teeth 210 are always engaged when the push button 300 is not pressed.

As shown in fig. 1, in order to maintain the first end face teeth 511 and the second end face teeth 210 in a normal engaged state, the adjustment transmission sleeve 500 is provided with an elastic member 530 which maintains the first end face teeth 511 and the second end face teeth 210 in an engaged state; specifically, the elastic member 530 may be a compression spring, and the wire diameter, pitch, etc. of the compression spring may be designed according to the desired pre-compression force, so that a relatively accurate pre-compression force value may be obtained.

Specifically, the elastic member 530 is located at the lower end of the adjustment sleeve 510 and is sleeved on the push rod nut 520, and it should be noted that, fig. 1 only schematically illustrates the position of the elastic member 530, and does not represent the actual connection relationship of the elastic member 530. Further, a sliding plate 540 is disposed at the lower end of the adjusting sleeve 510, the sliding plate 540 is sleeved on the push rod nut 520, the elastic member 530 is disposed below the sliding plate 540 and abuts against the sliding plate 540, a plurality of protruding points 513 are disposed at the lower end of the adjusting sleeve 510, and the protruding points 513 are in point contact with the sliding plate 540. This connection reduces friction between the adjustment sleeve 510 and the elastic member 530, and allows for more flexibility in axial movement of the adjustment sleeve 510.

When the push dose is regulated, the regulating knob 200 is rotated, the regulating sleeve 510 is driven to rotate by the first end face teeth 511 and the second end face, the regulating sleeve 510 is driven to rotate by the cooperation of the first groove and the first convex rib 521, and the push rod nut 520 is in threaded connection with the push rod 600, and when the push dose is regulated, the push rod 600 is prevented from rotating by the rotation stopping structure, the push rod 600 keeps the zero position to be motionless, and the push rod nut 520 rotates upwards relative to the push rod 600.

The arrangement of the adjustment drive sleeve 500 in two parts, the push rod nut 520 and the adjustment sleeve 510, causes a problem that the axial position of the push rod nut 520 is free during the "adjustment push amount" stopping and pushing, and if the fit clearance of the threaded connection between it and the push rod 600 is relatively large, additional axial slippage may occur under the action of self-gravity or otherwise, which may have the consequence that the push amount is inaccurate; to avoid this, the pushing device of the embodiment of the invention is also provided with an adjusting stabilizing ring 700; the adjusting stabilizer ring 700 is sleeved on the push rod nut 520, and the structure and shape of the adjusting stabilizer ring 700 are shown in fig. 10 to 12.

Specifically, the adjusting stabilizing ring 700 is sleeved on the adjusting transmission sleeve 500, and the adjusting stabilizing ring 700 and the adjusting transmission sleeve 500 are axially fixed; the outer surface of the adjusting stabilizing ring 700 is in threaded connection with the inner wall of the housing; the adjustment stabilizing ring 700 rotates with the rotation of the dial ring 800. More specifically, the outer surface of the adjustment stabilizer ring 700 is provided with a second external thread 730, and the corresponding position of the inner wall of the housing is provided with a second internal thread, so that the sliding of the spindle nut 520 is limited not only by the threaded connection between itself and the push rod 600, but also by the threaded connection between the adjustment stabilizer ring 700 and the housing, further limiting the axial sliding of the spindle nut 520.

As shown in fig. 10 to 12, the adjustment stabilizer ring 700 is provided with a first cavity 710 and a second cavity 720 which are coaxial and communicated in the axial direction, the inner diameter of the first cavity 710 is larger than the inner diameter of the second cavity 720, and a second external thread 730 is provided outside the first cavity 710. The adjusting stabilizing ring 700 may extend into the scale ring 800, specifically, the second cavity 720 extends into the scale ring 800 at least partially, the second cavity 720 is provided with a second protruding rib 750 outside, the scale ring 800 is provided with a second groove 830 matching with the second protruding rib 750, and the second protruding rib 750 and the second groove 830 cooperate to transmit torque, so that the scale ring 800 can rotate to drive the adjusting stabilizing ring 700 to rotate.

In the illustrated embodiment of the present invention, a step portion 740 is formed at the connection between the first cavity 710 and the second cavity 720, a stop pawl 760 extending from the step portion 740 to the pushing end is disposed in the first cavity 710, a stop flange 522 is disposed in a ring shape at a corresponding position of the push rod nut 520, the stop pawl 760 abuts against a lower peripheral surface of the stop flange 522, and the step portion 740 abuts against an upper peripheral surface of the stop flange 522, as shown in fig. 1. The adjustment stabilizer ring 700 and the push rod nut 520 are axially fixed, i.e., the adjustment stabilizer ring 700 and the push rod nut 520 can only rotate relative to each other in the circumferential direction and cannot move relative to each other in the axial direction.

In an embodiment of the invention not shown, the adjustment stabilizing ring 700 and the push rod nut 520 may also be secured by: the inner wall of the adjusting stabilizing ring 700 is provided with an annular elastic flange, and the outer circular surface of the push rod nut 520 is provided with an annular groove matched with the elastic flange; the annular groove and the elastic flange have a small axial clearance to ensure axial fixation with each other.

As shown in fig. 1, 8 and 13, one end of the adjusting sleeve 510 is further provided with a third end tooth 512, the locking member 400 is provided with a fourth end tooth 411 matched with the third end tooth 512, the first end tooth 511 and the second end tooth 210 are separated along with the pressing of the push button 300, and the push button 300 drives the adjusting transmission sleeve 500 to move towards the pushing end through the third end tooth 512 and the fourth end tooth 411.

The third face teeth 512 are located inside the first face teeth 511, both being coaxial. The third end tooth 512 and the fourth end tooth 411 can be engaged only when the adjusting knob 200 is pressed, and when the third end tooth 512 and the fourth end tooth 411 are engaged, the first end tooth 511 and the second end tooth 210 are disengaged, so that the two processes of adjusting the pushed dose and pushing are not interfered with each other.

Specifically, the locking member 400 includes a rotation stopping portion on which the fourth end-face tooth 411 is disposed, and an elastic portion 420 connecting the rotation stopping portion and the adjustment transmission sleeve 500 such that the third end-face tooth 512 and the fourth end-face tooth 411 remain in a non-engaged state when the push button 300 is not pressed.

As shown in fig. 1 and 13, the adjusting knob 200 is provided with an inner hole 240 therethrough, the inner hole 240 being located at a central position, and both the rotation stopping portion and the elastic portion 420 being located in the inner hole 240. The lower end of the locking portion 410 is provided with a fourth end tooth 411 matching with the third end tooth 512, and the upper end of the locking portion 410 is fixedly connected with the push button 300.

Specifically, as shown in fig. 13 and 14, the upper end of the locking portion 410 is provided with a rotation stopping groove 413 and a claw 412, the push button 300 is provided with a rotation stopping protrusion matched with the rotation stopping groove 413 and a circumferential table connected with the claw 412, the rotation stopping protrusion extends into the rotation stopping groove 413, and the rotation stopping protrusion and the rotation stopping groove 413 may be rectangular to prevent the locking member 400 from rotating relative to the push button 300. The claw 412 is clamped on the circumferential table to limit the upward position of the push button 300, so as to prevent the push button 300 from being separated from the locking piece 400, i.e. the push button 300 cannot be pulled out from the locking piece 400. The lower extreme of locking portion 410 is equipped with the accommodation chamber, and fourth terminal face tooth 411 evenly sets up along the periphery in accommodation chamber, and accommodation chamber and anti-rotation groove 413 are coaxial, and elastic part 420 one end and adjustment sleeve 510 butt, the roof butt of other end and accommodation chamber, elastic part 420 make third terminal face tooth 512 and fourth terminal face tooth 411 keep breaking away from the state, and when pushing down push button 300, both can mesh.

As shown in fig. 1 and 14, the push button 300 includes a cylinder that can pass through the inner hole 240 of the adjustment knob 200 and contact the locking member 400, and a cap rim having a diameter larger than the inner hole 240 of the adjustment knob 200. The top of cap edge is equipped with anti-skidding line, and the form of anti-skidding line is various, can set up as required, and anti-skidding line both can increase frictional force, has decorative effect again. The cylinder of push button 300 is open-ended tube-shape down, and the rotation-stopping lug sets up in the cylinder, therefore, when pushing down push button 300, push button 300 can oppress adjust knob 200, adjust knob 200 rotationally drives scale ring 800 and returns to zero, push button 300 passes through locking piece 400 and drives the straight line down movement of adjusting transmission cover 500, because adjusting transmission cover 500 and push rod 600 threaded connection, can drive push rod 600 straight line down movement when adjusting transmission cover 500 straight line down movement, and then accomplish the propelling movement. If the push rod 600 is subjected to a greater resistance to stop pushing during pushing, sources of such resistance include, but are not limited to, greater resistance between the vial stopper 930 and the vial associated with the push rod 600 for pushing the medicament. Since the second end teeth 210 of the adjusting knob 200 are disengaged from the first end teeth 511 of the adjusting sleeve 510, the fourth end teeth 411 of the push button 300 are engaged with the third end teeth 512 of the adjusting sleeve 510, the adjusting sleeve 510 can only move but cannot rotate, the push rod nut 520 cannot rotate, and since the push rod nut 520 is in threaded connection with the push rod 600, the push rod 600 is not moved, the push rod nut 520 is also not moved, and finally the pushing process cannot be performed, i.e., once the push rod 600 stops pushing, the adjusting transmission sleeve 500 also stops pushing, thereby ensuring the accuracy of the pushed dose.

As shown in fig. 1, for convenience in manufacturing and assembly, the housing includes a cylindrical housing 100 and a combined functional ring fixed on an inner wall of the housing 100, the first and second internal threads are disposed in the combined functional ring, a first boss 111 extending radially inward from the inner wall of the housing is further disposed in the combined functional ring, one side of the first boss 111 can define a moving distance of the adjusting stabilizing ring 700 toward the adjusting end, and the other side of the first boss 111 can define a moving distance of the scale ring 800 toward the pushing end.

The combined functional ring may be a physically inseparable component or may be divided into two components, specifically, the combined functional ring includes a first ring 110 and a second ring 130, as shown in fig. 1, a first internal thread is disposed in the first ring 110 at the upper end, a second internal thread is disposed in the second ring 130 at the lower end, and a first boss 111 is disposed at a connection between the first ring 110 and the second ring 130. Since the scale ring 800 has a variation in the axial inner diameter and also has a stepped portion formed, the stepped portion of the scale ring 800 is located above the first boss 111, the first boss 111 limits the downward movement of the scale ring 800, i.e., the movement toward the pushing end, the adjustment stabilizing ring 700 is located below the first boss 111, the upward movement of the adjustment stabilizing ring 700 by the first boss 111 defines the maximum distance upward of the adjustment stabilizing ring 700, and the maximum distance downward of the scale ring 800 by the first boss 111. Further, a limit structure may be provided for upward movement of the dial ring 800.

As shown in fig. 1, 15 and 16, the housing includes a second boss 140 extending radially inward from the inner wall of the casing 100, the second boss 140 being located at the push end, and an end of the adjustment stabilizer ring 700 being capable of abutting the second boss 140. The second boss 140 plays a limiting role in regulating downward displacement of the stabilizer ring 700. The second boss 140 may be formed in such a manner that: the lower end of the housing 100 is internally formed with a bottom-up flange.

In the embodiment of the present invention, the casing 100 is further provided with an annular blocking structure 170 at the pushing end, the inner wall of the blocking structure 170 is provided with a plurality of axially extending tooth grooves 171, and the tooth grooves 171 are uniformly spaced along the circumferential direction of the blocking structure 170; at least one elastic supporting leg 523 is arranged at one end of the adjusting transmission sleeve 500 positioned at the pushing end, and teeth 524 matched with the tooth grooves 171 are arranged on the elastic supporting leg 523.

As shown in fig. 8, 15, 16 and shown in fig. 8, the lower end of the push rod nut 520 is provided with two arc elastic legs 523 along the circumferential direction, each elastic leg 523 is provided with a tooth 524, and the tooth 524 is matched with the tooth groove 171, so that the structure not only can better ensure that the push rod nut 520 does not shake radially, but also can bring obvious intermittent rotation feeling to a patient when the push dosage is regulated, namely, a preset dosage is regulated, the hand has a giggling feeling, and sounds, thereby being convenient for the patient to operate under the condition that the push quantity scale mark is not clearly seen, and the eyesight of many diabetics can be greatly reduced; and such a structure does not interfere with axial movement during pushing, ensuring normal movement of the adjustment transmission sleeve 500 and the push rod 600.

It should be noted that, the blocking structure 170 may be a separate component that is separable from the housing 100, or may be integrally formed with the housing 100, and the blocking structure 170 is shown to be integrally formed with the housing 100 and located inside the housing 100 in the embodiment of the present invention.

As shown in fig. 15 and 16, the blocking structure 170 is further provided with a third boss 180 extending radially inward from the inner wall of the blocking structure 170 at the pushing end, and one end of the push rod nut 520 can abut against the third boss 180. The third boss 180 limits downward displacement of the push rod nut 520. The third boss 180 may be formed by a diameter variation of the blocking structure 170, and in particular, an upper portion of the blocking structure 170 has a larger diameter and a lower portion has a smaller diameter, and the third boss 180 is formed at the diameter variation.

As shown in fig. 17, the circumference of the push rod 600 is provided with a threaded surface 620 and at least one flat surface 610 penetrating the entire length of the push rod 600, the threaded surface 620 is in threaded connection with the adjusting transmission sleeve 500, and the axial direction of the rotation stopping structure is provided with a rotation stopping hole 121 with a cross section shape matched with that of the flat surface 610.

As shown in fig. 18, the rotation stopping structure may be a reset rotation stopping sleeve 120 with a reset function, that is, the reset rotation stopping sleeve 120 and the shell are physically separable independent components, and the cross section shape of the rotation stopping hole 121 is adapted to the push rod 600, so that the push rod 600 cannot rotate as long as the reset rotation stopping sleeve 120 does not rotate. Specifically, after the medicine in the pushing container 900 is pushed, the pushing container 900 is disassembled, the reset rotation stopping sleeve 120 is loosened, the reset rotation stopping sleeve 120 is manually rotated, and then the push rod 600 is driven to rotate, so that the push rod 600 moves towards the adjusting end of the shell and returns to the position before being not pushed, a stop part is generally arranged, and the push rod 600 is stopped after returning to the position before not being pushed and cannot rotate or move. The pushing device can be reused due to the reset function.

In addition, the rotation stopping structure may also be a rotation stopping structure only for preventing the rotation function of the push rod 600, specifically, the rotation stopping structure and the housing 100 are in an integral structure, for example, the rotation stopping structure and the housing 100 are integrally formed, the rotation stopping structure is fixedly connected with the housing 100, the push rod 600 passes through the rotation stopping hole 121 of the rotation stopping structure, after the push rod 600 cannot be reset, and the push device is a disposable push device.

Other structures and operations of the pushing device according to the embodiments of the present invention will be understood and readily implemented by those skilled in the art, and thus will not be described in detail.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. The pushing device is characterized by comprising a shell, a scale ring, an adjusting knob, an adjusting transmission sleeve, a push rod, a pushing button, a locking piece and a rotation stopping structure; wherein:

the locking piece is arranged at the adjusting end of the shell, the locking piece is connected with the push button and the adjusting transmission sleeve, and when the push button is pressed, if the push rod is stopped to move towards the push end by external force, the locking piece limits the adjusting transmission sleeve to move towards the push end;

one end of the adjusting transmission sleeve is provided with a first end face tooth, the adjusting knob is provided with a second end face tooth matched with the first end face tooth, and the adjusting knob drives the adjusting transmission sleeve to rotate through the first end face tooth and the second end face tooth;

the push button drives the adjusting transmission sleeve to move towards the push end through the third end face tooth and the fourth end face tooth;

the locking piece comprises a locking part and an elastic part, the fourth end face tooth is arranged on the locking part, and the elastic part is connected with the locking part and the adjusting transmission sleeve so that the third end face tooth and the fourth end face tooth are kept in a non-meshing state when the push button is not pressed.

2. The pushing device of claim 1, wherein the adjustment knob is provided with an internal bore in which the locking member is mounted;

3. The pushing device of claim 1, wherein the adjustment drive sleeve includes an elastic member that maintains the first end tooth and the second end tooth in engagement when the push button is not depressed.

4. A pusher device according to claim 3, wherein the adjustment transmission sleeve further comprises a pusher nut and an adjustment sleeve, the pusher nut being provided with an internal thread cooperating with the pusher; the adjusting sleeve is sleeved on the push rod nut, can move along the axis of the push rod nut and can drive the push rod nut to rotate; the adjusting sleeve is arranged on the scale ring in a penetrating mode, and one end of the adjusting sleeve is provided with the first end face teeth.

5. The pushing device according to claim 4, wherein the inner wall of the adjusting sleeve is provided with at least one first groove extending axially, and the push rod nut is provided with a first convex rib corresponding to the first groove; or (b)

6. The pushing device of claim 1, further comprising an adjustment stabilizing ring, wherein the adjustment stabilizing ring is sleeved on the adjustment drive sleeve, and wherein the adjustment stabilizing ring and the adjustment drive sleeve are axially fixed; the outer surface of the adjusting stabilizing ring is in threaded connection with the inner wall of the shell; the adjustment stabilizing ring rotates with the rotation of the scale ring.

7. The pushing device of claim 6, wherein an outer surface of the dial ring is threadably coupled to an inner wall of the housing.

8. The pushing device according to claim 7, wherein the housing comprises a cylindrical outer shell and a combined functional ring fixed on the inner wall of the outer shell, the combined functional ring is provided with a first internal thread and a second internal thread, and the scale ring is provided with a first external thread matched with the first internal thread; the adjusting stabilizing ring is provided with a second external thread matched with the second internal thread;

9. The pushing device of claim 8, wherein the housing includes a second boss extending radially inward from the inner wall of the housing, the second boss being located at the pushing end, one end of the adjustment stabilizing ring being capable of abutting the second boss, the other end of the adjustment stabilizing ring extending into the graduated ring.

10. The pushing device according to claim 9, wherein the housing is further provided with an annular blocking structure at the pushing end, the inner wall of the blocking structure is provided with a plurality of axially extending tooth grooves, and the tooth grooves are uniformly spaced along the circumferential direction of the blocking structure;

11. The pushing device of claim 10, wherein the blocking structure is further provided with a third boss extending radially inward from an inner wall of the blocking structure at the pushing end, and wherein one end of the pusher nut is capable of abutting the third boss.

12. The pushing device according to claim 1, wherein a threaded surface and at least one flat surface penetrating through the whole length of the pushing rod are arranged on the circumference of the pushing rod, the threaded surface is in threaded connection with the adjusting transmission sleeve, and a rotation stopping hole matched with the flat surface in cross section shape is axially arranged on the rotation stopping structure.

13. The pushing device of claim 12, wherein the rotation stopping structure and the housing are of a unitary structure or the rotation stopping structure and the housing are of a separate structure.

14. A syringe comprising a push container and a push device according to any one of claims 1 to 13, the push container being mounted on the housing.