CN215780612U

CN215780612U - Quantitative injection device

Info

Publication number: CN215780612U
Application number: CN202122114574.XU
Authority: CN
Inventors: 张玉成; 周硕; 李斯; 周艺
Original assignee: Shanghai Ensheng Medical Technology Co ltd
Current assignee: Shanghai Ensheng Medical Technology Co ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-02-11
Anticipated expiration: 2031-09-02

Abstract

A metered dose injection device comprising: a housing member, a push rod member, and a clip member, wherein: the surface of the push rod part is provided with concave-convex structures which are continuously distributed along the axial direction, the push rod part is suitable for being sleeved with the outer sleeve part and moving along the axial direction of the outer sleeve part, the concave-convex structures are blocked by the clamping part in the moving process of the push rod part, and the distance between every two adjacent concave-convex structures corresponds to the dose of the injection; the clamping component is arranged at an opening of the first end of the push rod component, which is sleeved with the outer sleeve component, and is suitable for matching with the concave-convex structure on the push rod component to block the movement of the push rod component in the axial movement process of the push rod component along the outer sleeve component. By adopting the device, the precision of the injection amount of the injection object can be improved.

Description

Quantitative injection device

Technical Field

The embodiment of the specification relates to the technical field of medical instruments, in particular to a quantitative injection device.

Background

Injection devices, such as syringes, are mainly used for the injection, withdrawal and mixing of different medicaments. By cooperating with an injection needle or catheter, the medicament can be injected into the human body for the treatment of diseases.

The conventional medical injector brings great convenience to clinical application and is widely applied to various medical projects. However, in certain usage scenarios, for example: chemotherapy drugs, medicines for medical and aesthetic purposes, anesthetics, embolic agents and other scenes requiring high-precision quantitative injection are mostly marked by scales on the surface of an injector, and the injection amount is manually controlled, so that the ideal effect cannot be achieved due to the existence of visual errors. In addition, the difference of the sliding property of each syringe is larger, and the injection difficulty is increased.

In summary, how to improve the accuracy of the injection amount of an injection material such as a drug is to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, embodiments of the present disclosure provide a quantitative injection device capable of improving the accuracy of the injection amount of the injection object.

The dosing device provided in embodiments of the present description, comprising: a housing member, a push rod member, and a clip member, wherein:

the surface of the push rod part is provided with concave-convex structures which are continuously distributed along the axial direction, the push rod part is suitable for being sleeved with the outer sleeve part and moving along the axial direction of the outer sleeve part, the concave-convex structures are blocked by the clamping part in the moving process of the push rod part, and the distance between every two adjacent concave-convex structures corresponds to the dose of the injection;

the clamping component is arranged at an opening of the first end of the push rod component, which is sleeved with the outer sleeve component, and is suitable for matching with the concave-convex structure on the push rod component to block the movement of the push rod component in the axial movement process of the push rod component along the outer sleeve component.

Optionally, the clip member includes a fixing body, an opening structure, and a clip body, wherein:

the fixing body is suitable for being fixedly connected with the outer sleeve component;

the opening structure is arranged on the fixed body and is suitable for the push rod component to pass through;

the joint body set up in on the fixed part, and the orientation the opening structure is suitable for the joint the concave-convex structure on push rod part surface is in order to retard the motion of push rod part.

Optionally, the fixing body is of a U-shaped structure, wherein an opening of the U-shaped structure is adapted to an opening of the first end of the outer sheath member.

Optionally, the joint body includes first joint portion and second joint portion, set up relatively in opening structure department, just first joint portion with the gap has between the second joint portion, the size in gap with the concave-convex structure looks adaptation on push rod part surface.

Optionally, the first clamping portion and the second clamping portion are both elastic pieces.

Optionally, the first end of the outer jacket member has a bead perpendicular to its axial direction.

Optionally, the fixing body comprises:

plate body

And the plurality of buckles are distributed on the bottom surface of the plate body and are suitable for being clamped with the turned edge of the first end of the outer sleeve component.

Optionally, the clip body includes: first holding portion, second holding portion, third joint portion, fourth joint portion, first elastic component and second elastic component, wherein:

the first accommodating part and the second accommodating part are positioned on the bottom surface of the plate body and are oppositely arranged at two ends of the opening structure, a first guide rail is arranged in the first accommodating part, and a second guide rail is arranged in the second accommodating part;

the third clamping part and the fourth clamping part are oppositely arranged on two sides of the opening structure, the third clamping part can move along the first guide rail, and the fourth clamping part can move along the second guide rail, wherein a gap is formed between the third clamping part and the fourth clamping part, and the size of the gap is matched with the concave-convex structure on the surface of the push rod part;

the first elastic piece is arranged in the first accommodating part, the first end of the first elastic piece is in elastic contact with the plate body, and the second end of the first elastic piece is fixedly connected with the third clamping and connecting part and is suitable for being matched with the first guide rail to drive the third clamping and connecting part to move along the first guide rail;

the second elastic piece is arranged in the second accommodating part, a first end of the second elastic piece is in elastic contact with the plate body, a second end of the second elastic piece is fixedly connected with the fourth clamping piece and is suitable for being matched with the second guide rail to drive the fourth clamping part to move along the second guide rail.

Optionally, the continuously distributed concave-convex structures are parallel along the axial direction of the push rod component, the cross-sectional shapes of the concave-convex structures are saw-toothed concave-convex structures, and the distances between every two adjacent saw-toothed concave-convex structures are equal.

Optionally, the continuous concave-convex structure is a helical concave-convex structure distributed along the surface of the push rod component, and the pitch of each adjacent helical concave-convex structure is equal.

The quantitative injection device provided by the embodiment of the specification comprises an outer sleeve component, a push rod component and a clamping component, wherein the push rod component can move along the axial direction of the outer sleeve component, in the moving process of the push rod component, the surface of the push rod component is provided with a concave-convex structure which is continuously distributed along the axial direction, so that the concave-convex structure is blocked by the clamping component, the moving of the push rod component can be blocked under the matching of the concave-convex structure and the clamping component, and the distance between the adjacent concave-convex structures and the dose of an injection object have a corresponding relation, so that the dose of the injection object can be accurately controlled by blocking the moving of the push rod component, the influence of personal experience and visual errors of an injector can be avoided, and the precision of the injection amount of the injection object can be improved.

Further, the card formula part includes the fixed body, the opening structure and the joint body, will block the fixed opening part that sets up in the first end that the push rod part cup jointed with the overcoat part of card formula part through the fixed body the push rod part is followed during the axial motion of overcoat, its surface distribution's concave-convex structure can pass through the opening structure with the joint body joint is in order to block the motion of push rod part to can control the dose of injection, improve the precision of the injection volume of injection.

Further, the fixed body is U type structure, wherein, the opening of U type structure with the opening looks adaptation of the first end of overcoat part, through with U type opening design for with the opening of the first end of overcoat part suits, can realize the fixed connection of fixed body and overcoat part, avoids in the use, and the card formula part drops.

Furthermore, because the first clamping portion and the second clamping portion are elastic pieces and have elasticity, the push rod component can accurately control the injection process and the extraction process of the injection through the axial reciprocating motion of the outer sleeve component, and therefore the injection quantity precision of the injection is improved.

Furthermore, the fixing body comprises a plate body and a plurality of buckles, the plurality of buckles can be clamped with the turned edge of the first end of the outer sleeve part, and the buckles are clamped with the turned edge of the first end of the outer sleeve part, so that on one hand, the fixing body can be fixedly connected with the outer sleeve part, and the clamping part is prevented from falling off in the using process; on the other hand, because buckle and turn-up are but plug-in connection, consequently can the quick replacement different grade type card formula part, can adapt to different application scenes, have better universality, and can reduce the change time.

Further, the concave-convex structures continuously distributed on the push rod component are parallel along the axial direction of the push rod component, the cross section of each concave-convex structure is a saw-toothed concave-convex structure, the distances between every two adjacent saw-toothed concave-convex structures are equal, and the distances between every two adjacent saw-toothed concave-convex structures and the dose of the injection have the same corresponding relation, so that the precision of the injection amount of the injection can be improved by adopting the push rod component with the saw-toothed concave-convex structures.

Further, the concave-convex structures continuously distributed on the pusher member are spiral concave-convex structures distributed along the surface of the pusher member, and the pitches of the adjacent spiral concave-convex structures are equal, and the distances between the adjacent spiral concave-convex structures and the dose of the injection have the same corresponding relationship, so that the precision of the injection amount of the injection can be improved by adopting the pusher member with the spiral concave-convex structures.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings used in the embodiments of the present disclosure or the prior art descriptions will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a syringe.

Fig. 2 is a schematic structural diagram of a quantitative injection device in an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a card-type component in an embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram of another card member in the embodiment of the present specification.

Fig. 5 is a schematic structural diagram of a push rod component in an embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of another push rod component in the embodiment of the present disclosure.

Fig. 7 is a schematic view of a combined structure of a push rod component and a clamping component in the embodiment of the present disclosure.

Fig. 8 is a schematic view of another structure of the push rod component and the clip component in the embodiment of the present disclosure.

Fig. 9 is a schematic view of a combined structure of a push rod component and a clamping component in the embodiment of the present disclosure.

Detailed Description

Referring to the schematic structure of an injector shown in fig. 1, the injector 10 may include a housing 11, a piston 12, and a push rod 13.

Wherein the sheath 11 is a hollow structure, and the surface thereof has a scale mark 112 (for example, scale marks 1 to 5, in ml), and the first end of the sheath 11 has a curled edge 113, and the second end thereof has a conical head 111 capable of connecting with an injection needle or a catheter.

The piston 12 is disposed at a first end of the push rod 13, and when the push rod 13 pushes the hollow structure inside the housing 11, the piston 12 and the housing 11 may form a closed space for accommodating the medicament.

When injecting or extracting the medicine, the operator operates the push rod 13 by referring to the scale marks 112 on the surface of the outer sleeve 11, so that the push rod 13 moves along the axial direction of the outer sleeve 11 and completes the quantitative injection or quantitative extraction operation of the medicine under the action of the piston 12.

However, as is clear from the background art, due to the presence of visual errors, the dosage of the medicament often does not meet the requirements when the medicament is injected or withdrawn. In addition, the difference in the sliding properties of the seed syringe is large, and it is difficult to control the injection amount of the injection product, and the injection accuracy is low.

To solve the above problems, embodiments of the present specification provide a quantitative injection device including a housing member, a push rod member, and a clip member, wherein the push rod member is movable in the axial direction of the outer sheath member, and during the movement of the push rod member, because the surface of the push rod part is provided with the concave-convex structure which is continuously distributed along the axial direction, the concave-convex structure is blocked by the clamping part, the concave-convex structure and the clamping component can block the movement of the push rod component under the matching of the concave-convex structure and the clamping component, since the distance between adjacent reliefs corresponds to the dose of injectate, by blocking the movement of the pusher member, the dosage of the injectate can be accurately controlled without being influenced by personal experience and visual error of an injector, so that the precision of the injection amount of the injectate can be improved.

For a better understanding and appreciation of the illustrative embodiments by those skilled in the art, the concepts, schemes, principles, and advantages of the illustrative embodiments will be described in detail below with reference to the accompanying drawings, along with a specific application example.

Referring to fig. 2, a schematic diagram of a quantitative injection device in an embodiment of the present description, in some embodiments of the present description, the quantitative injection device 20 may include: an outer sheath member 21, a push rod member 22, and a clip member 23, wherein:

the push rod part 22, the surface of which has a concave-convex structure (for example, the concave-convex structure 221 in the figure) continuously distributed along the axial direction, is suitable for being sleeved with the outer sleeve part 21 and moving along the axial direction of the outer sleeve part 21, and the concave-convex structure is blocked by the clamping part 23 during the movement of the push rod part 22, wherein the distance between adjacent concave-convex structures has corresponding relation with the dose of the injection;

the clamping component 23 is arranged at an opening of a first end of the push rod component 22 sleeved with the outer sleeve component 21, and is suitable for being matched with a concave-convex structure on the push rod component 22 in the axial movement process of the push rod component 22 along the outer sleeve component 21 to block the movement of the push rod component 22.

When the push rod member 22 moves along the axial direction of the outer sleeve 21, the concave-convex structure whose surface is continuously distributed along the axial direction is blocked by the clamping member 23, and the movement of the push rod member 22 can be blocked under the combined action of the concave-convex structure 221 and the clamping member 23.

In the axial movement process of the push rod part 22 along the outer sleeve 21, because the distance between the adjacent concave-convex structures on the surface of the push rod part 22 and the dose of the injection have a corresponding relation, under the matching of the concave-convex structures and the clamping part 23, the dose of the injection can be accurately controlled by retarding the movement of the push rod part 22, and the influence of personal experience and visual errors of an injector can be avoided, so that the precision of the injection amount of the injection can be improved.

In the embodiment of the present disclosure, the quantitative injection device may further include a piston member (not shown in fig. 2) disposed at one end of the push rod member and adapted to form a closed space with the outer sheath member for accommodating the injectate when the push rod member moves along the axial direction of the outer sheath.

In specific implementation, a sealing ring can be arranged at the joint of the piston component and the push rod component, and the sealing ring can prevent the injectate from flowing out of a gap between the piston component and the outer sleeve component when the push rod component pushes the piston component to move.

In order to make the embodiments of the present disclosure better understood and implemented by those skilled in the art, specific examples of specific implementations of specific components of a quantitative injection device in the embodiments of the present disclosure are given below with reference to the accompanying drawings.

In an embodiment of the present specification, the clip member may include a fixing body, an opening structure, and a clip body, wherein:

Adopt above-mentioned card formula part, can will block the fixed opening part that sets up in the first end that the card formula part cup jointed with the overcoat part through its fixed body the push rod part is followed during the axial motion of overcoat, its surface distribution's concave-convex structure can pass through open structure with the joint body joint is in order to block the motion of push rod part to can control the dose of injection thing, improve the precision of the injection volume of injection thing.

In a specific implementation, the clamping component can be directly and fixedly connected with the outer sleeve and matched with the concave-convex structure on the push rod component to block the movement of the push rod component.

Referring to a schematic structural diagram of a card-type component in an embodiment of the present specification shown in fig. 3, wherein the card-type structure 30 may include a fixing body 31, an opening structure 32, and a card-type body 33, as shown in fig. 3, wherein:

the fixing body 31 has a U-shaped structure, wherein the opening of the U-shaped structure is adapted to the opening of the first end (not shown in fig. 3) of the outer sheath member;

the joint body 33 includes first joint portion 331 and second joint portion 332, set up relatively in opening structure 32 department, just first joint portion 331 with have the gap between the second joint portion 332, the size in gap with the concave-convex structure looks adaptation on push rod part surface, as shown in fig. 7 and 8.

In specific implementation, the U-shaped opening is designed to be adapted to the opening of the first end of the outer sleeve member, so that the fixing body 31 can be fixedly connected with the outer sleeve member, and the clamping member is prevented from falling off in the using process.

The fixing body 31 and the outer jacket member may be fixedly connected by adhesion.

In specific application, in order to accurately control the injection amount of the injection in the injection process and the extraction process and improve the injection amount precision of the injection, when the push rod component moves back and forth along the axial direction of the outer sleeve component, the first clamping portion 331 and the second clamping portion 332 can be clamped at the concave-convex structure on the surface of the push rod component, and therefore, the first clamping portion 331 and the second clamping portion 332 need to have elasticity.

When the push rod component is in a static state, the first clamping portion 331 and the second clamping portion 332 do not generate elastic deformation and are clamped in the concave portion of the concave-convex structure of the push rod component; when the push rod member moves along the axial direction of the outer sleeve member, the first clamping portion 331 and the second clamping portion 332 are elastically deformed, the push rod member can move along the axial direction of the outer sleeve member, and when the first clamping portion 331 and the second clamping portion 332 contact with the concave portion of the concave-convex structure during the movement of the push rod member, the first clamping portion 331 and the second clamping portion 332 restore to the original state and are clamped to the concave portion of the concave-convex structure adjacent to the previous concave-convex structure; when the movement distance of the push rod component reaches a preset distance and the movement is stopped, the first clamping portion 331 and the second clamping portion 332 are clamped in the concave portion of the concave-convex structure at the preset distance to block the further movement of the push rod component.

As a specific example, the first clamping portion 331 and the second clamping portion 332 may be elastic sheets.

In addition, in order to reduce the resistance of the push rod during the movement and adapt to the concave-convex structure of the push rod, in the embodiment of the present specification, as shown in fig. 3, the first clamping portion 331 and the second clamping portion 332 each have a chamfered surface facing the bottom of the opening structure.

In a specific implementation, as shown in fig. 2, the first end of the outer sheath member 21 may further have a curled edge 211 perpendicular to the axial direction thereof, and the curled edge 211 may be snapped into the snap-type member 23 to achieve connection of the snap-type member 23 and the outer sheath member 21.

In the embodiment of the present disclosure, when the first end of the outer casing member has a curled edge perpendicular to the axial direction thereof, with reference to fig. 3, the fixing body 31 further includes a first engaging groove 311 and a second engaging groove 312, which are oppositely disposed on two sides of the U-shaped structure and can be engaged with the curled edge to realize connection between the fixing body 31 and the outer casing member.

The first clamping groove 311 and the second clamping groove 321 are clamped with the turned edge of the first end of the outer sleeve component, so that on one hand, the fixed connection between the fixed body 31 and the outer sleeve component can be realized, and the clamping component is prevented from falling off in the using process; on the other hand, the first card slot 311, the second card slot 321 and the curling edge are connected in a pluggable manner, so that different types of card-type components can be replaced quickly, different application scenes can be adapted, better universality is achieved, and the replacement time can be shortened.

In a specific implementation, when the first end of the outer sleeve member has a bead perpendicular to the axial direction thereof, the clip member may include a catch, and the clip member may be fixedly connected to the bead via the catch and cooperate with a relief on the plunger member to retard movement of the plunger member.

Referring to a schematic structural diagram of another snap-in component in the embodiment of the present specification shown in fig. 4, the snap-in component 40 may include a fixing body 41, an opening structure 42, and a snap-in body 43, as shown in fig. 4, wherein:

the fixing body 41 includes a plate body 411 and a plurality of snaps (e.g., a snap 412 and a snap 413), wherein:

the plurality of buckles are distributed on the bottom surface of the plate body 411 and are suitable for being buckled with a turned edge (not shown in fig. 4) at the first end of the outer sleeve component;

for example, the

clips

412 and 413 are oppositely disposed on the bottom surface of the plate 411 and can be engaged with the rolled edge of the first end of the outer sheath member.

In specific implementation, the buckle is clamped with the turned edge at the first end of the outer sleeve component, so that on one hand, the fixed connection between the fixed body 41 and the outer sleeve component can be realized, and the clamping component is prevented from falling off in the use process; on the other hand, because buckle and turn-up are but plug-in connection, consequently can the quick replacement different grade type card formula part, can adapt to different application scenes, have better universality, and can reduce the change time.

The clip body 43 includes: a first accommodating portion 431, a second accommodating portion 432, a third clamping portion 433, a fourth clamping portion 434, a first elastic member 435 and a second elastic member 436, wherein:

the first accommodating portion 431 and the second accommodating portion 432 are located on the bottom surface of the plate 411 and are oppositely disposed at two ends of the opening structure 42, a first guide rail 437 is disposed in the first accommodating portion 431, and a second guide rail 438 is disposed in the second accommodating portion 432;

the third clamping portion 433 and the fourth clamping portion 434 are oppositely disposed at two sides of the opening structure 42, the third clamping portion 433 can move along the first guide rail 437, and the fourth clamping portion 434 can move along the second guide rail 438, wherein a gap is formed between the third clamping portion 433 and the fourth clamping portion 434, and the size of the gap is adapted to the concave-convex structure on the surface of the push rod component, as shown in fig. 9;

the first elastic member 435 is disposed in the first accommodating portion 431, a first end of the first elastic member is in elastic contact with the plate 411, a second end of the first elastic member is fixedly connected to the third engaging portion 433, and the first elastic member is adapted to cooperate with the first guide rail 4311 to drive the third engaging portion 433 to move along the first guide rail 437;

the second elastic member 436 is disposed in the second accommodating portion 432, a first end of the second elastic member is in elastic contact with the plate 411, a second end of the second elastic member is fixedly connected to the fourth engaging member 434, and the second elastic member is adapted to cooperate with the second guide rail 437 to drive the fourth engaging member 434 to move along the second guide rail 438.

When the push rod component is in a static state, the first elastic piece 435 and the second elastic piece 436 are in a natural extension state, and the third clamping part 433 and the fourth clamping part 434 are clamped in the concave part of the concave-convex structure of the push rod component; when the push rod member moves along the axial direction of the housing member, the first elastic member 435 and the second elastic member 436 are compressed, the third engaging portion 433 moves along the first guide track 437 in the first preset direction under the driving of the first elastic member 435, and meanwhile, the fourth engaging portion 444 moves along the second guide track 437 in the second preset direction under the driving of the second elastic member 436; in the moving process of the push rod component, when the third clamping part 433 and the fourth clamping part 434 are in contact with the concave part of the concave-convex structure of the push rod component, the first elastic part 435 is reset and drives the third clamping part 433 to move along the first guide rail 437 in the direction opposite to the first preset direction, meanwhile, the second elastic part 436 is reset and drives the fourth clamping part 444 to move along the second guide rail 437 in the direction opposite to the second preset direction, and the third clamping part 433 and the fourth clamping part 434 are clamped in the concave part of the concave-convex structure adjacent to the previous concave-convex structure; when the movement distance of the push rod component reaches a preset distance, the third clamping portion 433 and the fourth clamping portion 437 are clamped in the concave portion of the concave-convex structure at the preset distance to block further movement of the push rod component.

In the embodiment of the present disclosure, in order to reduce the resistance of the push rod during the movement and match the concave-convex structure of the push rod, the third engaging portion 433 and the second engaging portion 434 have a chamfered surface facing the opening structure 42.

In addition, for reducing third joint portion 433 and fourth joint portion 434 and plate body 411's area of contact in the motion process, the both ends of third joint portion 431 be equipped with the arch of first guide rail 437 looks adaptation, the both ends of fourth joint portion 434 be equipped with the arch of second guide rail 438 looks adaptation to can reduce the frictional force between third joint portion 433, fourth joint portion 434 and plate body 411, use very little thrust, just can realize the motion of third joint portion 433 and fourth joint portion 434, convenient operation.

In a specific implementation, the first elastic member 435 mainly provides an elastic force to the third clamping portion 433, and the second elastic member 436 mainly provides an elastic force to the fourth clamping portion 434, so that the third clamping portion 433 and the fourth clamping portion 434 have a short movement stroke, and a material with elasticity or other elements capable of providing an elastic force can provide a sufficient elastic force.

As a specific example, the first elastic member 435 and the second elastic member 436 may be a spring or a material having elasticity such as rubber.

In a specific implementation, the snap-type member and the outer sleeve member may be integrally formed, for example, by injection molding, extrusion, or the like, while the outer sleeve member is being manufactured.

It is to be understood that the structure of the card-type component described above is merely an example, and in practical applications, the structure of the card-type component in the embodiments of the present specification may be modified according to practical requirements and application scenarios. For example, for the U-shaped configuration of FIG. 3, the bottom end portion may be a square configuration. The embodiment of the present specification does not limit the specific structure of the clip type component, as long as it can be fixedly connected with the outer sleeve component and can be clipped at the concave-convex structure of the push rod component in the moving process of the push rod component.

In specific implementation, when the clamping type component arranged on the outer sleeve component is removed, the push rod component can move freely along the axial direction of the outer sleeve component, so that the function of free injection of the traditional injector is realized, and therefore, the switching between quantitative injection and free injection can be realized by removing the clamping type component on the outer sleeve component, and the application in different clinical scenes is facilitated.

In a specific implementation, the embodiment of the present specification further provides a push rod component, which is adapted to the above-mentioned clip component, and has a concave-convex structure on a surface thereof, the concave-convex structure and the clip component are continuously distributed along an axial direction, and the concave-convex structure and the clip component cooperate together to realize accurate control of an injection amount of an injection object by retarding a movement of the push rod component, wherein the concave-convex structure includes a concave portion and a convex portion, and a clip portion in the clip component can be clipped in the concave portion of the concave-convex structure.

Referring to fig. 5, a schematic structural diagram of a push rod member in an embodiment of the present disclosure is shown, wherein the concave-convex structures continuously distributed on the push rod member 50 are parallel along the axial direction of the push rod member 50, and have saw-toothed concave-convex structures (e.g., saw-toothed concave-

convex structures

51, 52, and 53) in cross-sectional shapes, and distances between adjacent saw-toothed concave-convex structures are equal (e.g., a distance between the saw-toothed concave-

convex structures

51 and 52 is the same as a distance between the saw-toothed concave-convex structures 52 and 53).

In specific implementation, because the distance between adjacent concave-convex structures and the dose of the injection object have a corresponding relationship, the distance between adjacent concave-convex structures can be flexibly adjusted according to actual requirements under the condition of ensuring that the distances between adjacent concave-convex structures are equal, so that the distance between adjacent concave-convex structures and the dose of the injection object have the same corresponding relationship.

In the embodiment of the specification, the dose of the injectate corresponding to the distance between each two adjacent sawtooth-shaped concave-convex structures can be set according to the capacity of the quantitative injection device, and when the surface of the quantitative injection device is provided with scale marks, the dose of the injectate corresponding to the distance between each two adjacent sawtooth-shaped concave-convex structures is 1/20-2 times, preferably 1/10-1 times of the minimum scale mark; when the surface of the quantitative injection device has no scale marks, the dose of the injectate corresponding to the distance between the adjacent saw-tooth concave-convex structures can be 0.01mL, 0.05mL, 0.1mL, 0.2mL, 0.5mL or 1 mL. The specific correspondence can be selected by adjusting the distance between each adjacent saw-toothed concave-convex structure according to the capacity of the corresponding injection device.

Continuing to refer to fig. 5, as can be seen from fig. 5, the axial portion of the push rod component 50 is not completely distributed with the saw-toothed concave-convex structure, and a part of the axial portion is still left vacant to facilitate the clamping component to clamp the saw-toothed concave-convex structure at the two ends of the push rod component 50.

Referring to fig. 6, a schematic structural diagram of another tappet member in the embodiment of the present disclosure is shown, wherein the concave-convex structures continuously distributed on the tappet member 60 are helical concave-convex structures (for example, helical concave-

convex structures

61, 62, and 63) distributed along the surface of the tappet member 60, and pitches of the helical concave-convex structures of the respective phases are equal (for example, a distance between the helical concave-

convex structures

61 and 62 is the same as a distance between the helical concave-convex structures 62 and 63).

In specific implementation, because the distance between adjacent concave-convex structures and the dose of the injection object have a corresponding relationship, the distance between adjacent concave-convex structures can be flexibly adjusted according to actual requirements under the condition of ensuring that the distances between adjacent spiral concave-convex structures are equal, so that the distance between adjacent saw-toothed concave-convex structures and the dose of the injection object have the same corresponding relationship.

In the embodiment of the present specification, the dose of the injectate corresponding to the distance between each adjacent spiral concave-convex structure can be set according to the capacity of the quantitative injection device, and when the surface of the quantitative injection device has scale marks, the dose of the injectate corresponding to the distance between each adjacent spiral concave-convex structure is 1/20-2 times, preferably 1/10-1 times of the minimum scale marks; when the surface of the quantitative injection device has no scale marks, the dose of the injectate corresponding to the distance between the adjacent spiral concave-convex structures can be 0.01mL, 0.05mL, 0.1mL, 0.2mL, 0.5mL or 1 mL. The specific correspondence may be selected by adjusting the distance between each adjacent helical relief structure according to the capacity of the respective injection device.

With reference to fig. 6, as can be seen from fig. 6, the surface of the push rod component 60 is not completely distributed with the spiral concave-convex structure, and a part of the spiral concave-convex structure is still left to be convenient for the clamping component to clamp the spiral concave-convex structures at the two ends of the push rod component 60.

It should be understood that the above description of the concave-convex structure is only illustrative, and in practical applications, a person skilled in the art may adaptively select and/or modify the concave-convex structure of the putter component in the embodiments of the present disclosure according to actual requirements and application scenarios. For example, the number and size of the relief structures in the relief structure is changed to accommodate dosing devices having different capacities; for another example, the distance between adjacent concave-convex structures is adjusted to change the corresponding relation between the distance between adjacent concave-convex structures and the dose of the injection; also for example, the distance shape of the concave-convex structure is changed, and for example, the concave-convex structure may further include a trapezoidal concave-convex structure, a square concave-convex structure, an elliptical concave-convex structure with different radians, and the like. Based on this, more different extension schemes can be extended, and the embodiment of the present specification does not limit the extension schemes.

In a specific implementation, the pusher member and the clip member of the above embodiments may be combined to obtain a dosing device having different forms.

Referring to fig. 7, a schematic diagram of a combined structure of a push rod member and a clamping member in the embodiment of the present specification is shown, wherein the concave-convex structure of the push rod member 71 is a saw-toothed concave-convex structure.

When the serrated concave-convex structure of the push rod member 71 is perpendicular to the clip member 72, since the clip portions 721 and 722 in the clip member 72 are elastic pieces, when a certain pushing force is applied to the push rod member 71, the clip portions 721 and 722 are deformed, the push rod member 71 can move up or down along the clip portions 721 and 722, the serrated concave-convex structure distributed along the axial direction thereof moves along the push rod member 71, when the clip portions 721 and 722 contact the concave portions of the serrated concave-convex structure, the clip portions 721 and 722 recover the deformation and are clipped to the concave portions of the serrated concave-convex structure adjacent to the former serrated concave-convex structure, since the distance between the adjacent serrated concave-convex structures has a corresponding relationship with the dose of the injection, when the number of the concave portions of the serrated concave-convex structure clipped to the clip portions 721 and 722 reaches a preset number, the pushing force stops being applied, the clip portions 721 and 722 are clipped to the concave portions of the serrated concave-convex structure of the push rod member 71, the movement of the pusher member 71 is retarded to complete the injection or withdrawal process of the injectate.

In addition, because the width of the concave-convex structure side of the push rod part 71 is larger than that of the non-concave-convex structure side, when the saw-toothed concave-convex structure of the push rod part 71 is parallel to the clamping part 72, the width of the non-concave-convex layer of the push rod part 71 is smaller than the gap between the clamping

parts

721 and 722, the push rod part 71 can move freely without being blocked by the clamping

parts

721 and 722 in the clamping part 72, and the function of the push rod in the existing injection device is realized.

Referring to fig. 8, another schematic diagram of a combined structure of a push rod member and a card member in the embodiment of the present specification is shown, wherein the push rod member 81 in fig. 8 is different from that in fig. 7 in that the concave-convex structure of the push rod member 81 in fig. 8 is a spiral concave-convex structure, and the movement is realized by rotating the push rod member 81.

When the spiral concave-convex structure of the push rod part 81 contacts with the clamping part 82, as the clamping parts 821 and 822 in the clamping part 82 are elastic sheets, when the push rod part 81 is rotated, the clamping parts 821 and 822 are deformed, the push rod part 81 can move upwards or downwards along the clamping parts 821 and 822, the spiral concave-convex structures distributed along the axial direction of the push rod part move along with the push rod part 81, when the clamping parts 821 and 822 contact with the concave parts of the spiral concave-convex structures, the clamping parts 821 and 822 recover the deformation and are clamped to the concave parts of the spiral concave-convex structures adjacent to the previous spiral concave-convex structure, because the distance between the adjacent saw-tooth concave structures has corresponding relation with the dose of the injection, when the number of the concave parts of the spiral concave-convex structures clamped with the clamping parts 821 and 822 reaches the preset number, the push rod part stops rotating, the clamping parts 821 and 822 are clamped in the concave parts at the spiral concave parts of the spiral concave-convex structures of the push rod part 81, the rotational movement of the push rod member 81 is retarded to complete the injection or withdrawal process of the injectate.

Further, since the concave-convex structure of the pusher member 81 is a spiral concave-convex structure, the width of each side is the same, and thus, when the pusher member 81 rotates, it is always blocked by the engaging

portions

821 and 822.

Referring to a schematic view of a combined structure of a push rod member and a clip member in the embodiment of the present specification shown in fig. 9, the clip member 92 in fig. 9 is different from the clip member 71 in fig. 7 in that the clip members 92 have a one-way moving structure of the

clip portions

921 and 922, and therefore, the push rod member 91 can only move downward along the

clip portions

921 and 922.

When the jagged concave-convex structure of the said push rod member 91 is perpendicular to the card member 92, apply the thrust along its axial direction to the push rod member 91, the elastic members 923 and 924 are compressed, and the elastic member 923 drives the joint portion 921 to move to the first preset direction, the elastic member 924 drives the joint portion 922 to move to the second preset direction, the push rod member 91 can move downward along the joint portions 921 and 922, the jagged concave-convex structure distributed along its axial direction moves along the push rod member 91, when the push rod member 91 moves a certain distance, the elastic members 923 and 924 return to their original positions, and the elastic member 923 drives the joint portion 921 to move to the direction opposite to the first preset direction, the elastic member 924 drives the joint portion 922 to move opposite to the second preset direction, the joint portions 921 and 922 can be clamped to the concave portion of the jagged concave-convex-concave structure adjacent to the previous jagged concave-convex structure, because the distance between the adjacent jagged structures has a corresponding relationship with the dose of the injection, when the concave part number with the cockscomb structure of joint portion 921 and 922 joint reaches preset number, stop to exert thrust, elastic component 923 and 924 reset, and joint portion 921 and 922 joint are at the concave part of the cockscomb structure of push rod part 91, retardant push rod part 91 downstream, accomplish the injection or the extraction process of injection thing.

In addition, because the width of the concave-convex structure side of the push rod part 91 is larger than that of the non-concave-convex structure side, when the saw-toothed concave-convex structure of the push rod part 91 is parallel to the clamping part 92, the width of the non-concave-convex layer of the push rod part 91 is smaller than the gap between the clamping

parts

921 and 922, the push rod part 91 can move freely without being blocked by the clamping

parts

921 and 922, and the function of a push rod in the existing injection device is realized.

It is to be understood that the above-described examples provide embodiments, which can be combined, cross-referenced, without conflict, to extend to various possible embodiments that are presently contemplated as disclosed, disclosed in the examples of the present application.

It is noted that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the specification. And in the description of the present specification, 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 implying any number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of the feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the specification described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Although the embodiments of the present specification are disclosed above, the embodiments of the present specification are not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the embodiments of the utility model as defined in the appended claims.

Claims

1. A metered dose injection device, comprising: a housing member, a push rod member, and a clip member, wherein:

2. A dosing device according to claim 1, wherein the snap-in part comprises a fixing body, an opening structure and a snap-in body, wherein:

3. A dosing device according to claim 2, wherein the fixation body is U-shaped, wherein the opening of the U-shaped is adapted to the opening of the first end of the outer sleeve member.

4. The quantitative injection device of claim 3, wherein the clip body comprises a first clip portion and a second clip portion, the first clip portion and the second clip portion are oppositely disposed at the opening structure, a gap is formed between the first clip portion and the second clip portion, and the size of the gap is matched with the concave-convex structure on the surface of the push rod component.

5. The metered dose injection device of claim 4, wherein said first snap means and said second snap means are each a resilient tab.

6. A dosing device according to claim 2, characterized in that the first end of the outer sleeve member has a bead perpendicular to its axial direction.

7. A dosing injection device according to claim 6, wherein the fixation body comprises:

plate body

8. The metered dose injection device of claim 7, wherein said snap-in body comprises: first holding portion, second holding portion, third joint portion, fourth joint portion, first elastic component and second elastic component, wherein:

9. A dosing device according to claim 2, wherein the continuous relief is parallel along the axial direction of the plunger member and has a saw-toothed relief in cross-section, the distance between adjacent saw-toothed reliefs being equal.

10. A dosing device according to claim 2, wherein the continuous arrangement of relief structures is a helical relief structure arranged along the surface of the plunger member, the pitch of each adjacent helical relief structure being equal.