CN206777588U

CN206777588U - A kind of injection device

Info

Publication number: CN206777588U
Application number: CN201621419902.XU
Authority: CN
Inventors: 尹丹华
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-22
Filing date: 2016-12-22
Publication date: 2017-12-22
Anticipated expiration: 2026-12-22

Abstract

The injection device that the utility model embodiment provides, including shell, calibration loop, injection volume regulation ring, push rod and regulation drive sleeve, when in use, injected material container is installed in the output end of shell, push rod contacts the impetus of injected material container；Injection volume regulation ring is rotated, calibration loop will be driven and adjust drive sleeve upward sliding, and the distance kL (k of calibration loop upward sliding>1) it is more than the distance L of regulation drive sleeve upward sliding, and the distance of drive sleeve upward sliding is actual injection volume, the scale of more crypto set can be then marked out on calibration loop, so as to improve precision, the digital or/and alphabetical size marked on calibration loop can also be increased, so as to facilitate old man to use；In injection, to calibration loop applying power, calibration loop and regulation drive sleeve meeting slide downward, and regulation drive sleeve can drive push rod slide downward L, to injected material container applying power, complete injection.

Description

A kind of injection device

Technical field

The present invention relates to medical instruments field, and in particular to a kind of injection device.

Background technology

Diabetic needs often injection human insulin, and to reduce the fluctuation of blood glucose target, and human insulin must Palpus parenteral administration, could be played a role in human body.At present, the most common mode of human insulin is applied to diabetic It is to pass through hypodermic injection；The syringe mostly using disposable or fixed dosage is subcutaneously injected, but because patient needs to inject Dosage depend on his blood glucose target, therefore, the dosage of per injection is all different, and accurate regulator is required for before per injection Amount.In addition, being used in use, being also required to accurate quantification sometimes in other on-liquid medicines, such as external-applied ointment.Although mesh Preceding in the market also has the injection device of energy regulating dosage, but the problem of cumbersome or cost is high be present.

Therefore it provides a kind of can accurately adjust injection dosage, easy to operate and low cost injection device, just become One urgent problem to be solved.

The content of the invention

In view of this, the embodiment of the present invention it is expected that injection dosage, easy to operate and cost can accurately be adjusted by providing one kind Low injection device.

To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：

The embodiments of the invention provide a kind of injection device, the injection device includes shell, calibration loop, injection volume regulation Ring, push rod and regulation drive sleeve；

The shell includes the output end of connection injected material container and the dispensing end of implement injection；

The calibration loop is located in the shell, and the outer surface of the calibration loop is provided with and the outer casing inner wall circumference Direction is fixed, the unfixed default fit structure in axial direction；The injection volume regulation ring is located in the calibration loop, and the note The outer surface of the amount of penetrating regulation ring and the calibration loop inwall are thread matching structure；

The regulation drive sleeve is located in the injection volume regulation ring, and the regulation drive sleeve is provided with the injection volume The rotation of regulation ring and the transmission parts rotated；The dispensing end of the shell is provided with the transmission for coordinating and promoting the regulation drive sleeve Part departs from the separating component of the injection volume regulation ring, and the regulation drive sleeve is as the calibration loop is to the dispensing end of shell Slide and slide；

One end of the push rod is located in regulation drive sleeve, and the other end stretches out the output end of the shell, the push rod Outer surface and the inwall of the regulation drive sleeve be threaded connection, the output end of the shell, which is provided with, to be limited the push rod and rotates Spline structure.

In such scheme, the injection device also includes regulation stabilizing ring, and the regulation stabilizing ring is set in the regulation In drive sleeve, and the regulation stabilizing ring and the regulation drive sleeve axial restraint；The regulation stabilizing ring is injected towards shell The one end at end and the inwall key connection of injection volume regulation ring, are connected towards the inner thread of one end of shell output end and shell.

In such scheme, the calibration loop is arranged on the inwall of the shell, the outer surface of calibration loop and the shell Inwall key connection, and one end is stretched out from the dispensing end of shell.

In such scheme, one end towards shell output end in the outer surface of the regulation drive sleeve is provided with the first bullet Property it is raised, the output end of the shell is provided with the groove corresponding and axially distributed with the first elastic bumps.

In such scheme, the outer surface of the shell offers opening along the circumferential direction, and described in the open communication The inner chamber of shell；The outer surface of the injection volume regulation ring offers the second projection, and second projection passes through the shell Opening.

In such scheme, the circumference of the push rod is provided with the flat gesture face of at least one insertion whole length, the shell Output end set shape of cross section to be adapted with the push rod and the rotation stop hole of activity, note is installed in the output end of shell When penetrating thing container, the rotation stop hole is completely fixed.

In such scheme, the regulation drive sleeve is provided with outer cylinder gear towards one end outside of shell dispensing end, described The inwall of injection volume regulation ring is provided with the inner circle gear matched with the outer cylinder gear, and the injection volume regulation ring passes through described The engagement of outer cylinder gear and inner circle gear transmits moment of torsion to the regulation drive sleeve.

In such scheme, the regulation drive sleeve includes upper adjusting set and lower adjusting set, and the lower regulation, which is worn, is located at institute State regulation to put, the lower adjusting set rotates with the rotation of the upper adjusting set；

The upper regulation wears the inwall for being located at the injection volume regulation ring, and the outer cylinder gear is arranged at the up-regulation Towards one end of shell dispensing end, first elastic bumps are arranged at lower regulation and put section set, and the lower adjusting set is with adjusting Save stabilizing ring axial restraint.

In such scheme, regulation stabilizing ring inwall is provided with the first elastic flange of annular, the lower adjusting set outer round surface Provided with the first annular groove matched with first elastic flange.

In such scheme, separating component, separation unit are connected with one end of outer cylinder gear towards shell dispensing end Part is arranged on the inwall of the shell；The separating component is provided with the 3rd projection, is provided with shell raised for the described 3rd The axial pass trough passed through；The inwall of injection volume regulation ring is provided with elastic material, described elastic material one end is connected to described cylindrical Stud wheel is fixed towards one end of shell output end, the other end of elastic material.

In such scheme, the outer surface of the shell is arranged with locating ring, and the locating ring does circumferencial direction along shell Rotate, do not slide axially；The outer surface of the locating ring offers the helicla flute passed through for the 3rd projection.

In such scheme, the shell outer round surface is provided with the second elastic flange of annular, and the inwall of the locating ring is set There is the second ring-shaped groove matched with second elastic flange.

In such scheme, first elastic bumps include, and are symmetrical arranged along the outer surface circumference of the lower adjusting set Elastic equilibrium projection and elastic support arm, be symmetrically arranged with triangular hill in elastic leg extremities.

Injection device provided in an embodiment of the present invention, including shell, calibration loop, injection volume regulation ring, push rod and regulation pass Dynamic set, when in use, injected material container is installed in the output end of shell, push rod contacts the impetus of injected material container；Rotate Injection volume regulation ring, calibration loop will be driven and adjust drive sleeve upward sliding, and the distance kL (k of calibration loop upward sliding>1) More than the distance L of regulation drive sleeve upward sliding, and the distance of drive sleeve upward sliding is actual injection volume, then can carve The scale of more crypto set is marked out on degree ring, so as to improve precision, the numeral marked on calibration loop or/and word can also be increased Female size, to facilitate old man to use；Now, regulation stabilizing ring can prevent to adjust the random slip of drive sleeve, so as to improve essence Degree；In injection, to calibration loop applying power, calibration loop and regulation drive sleeve meeting slide downward, and regulation drive sleeve can drive and push away Bar slide downward distance L, to injected material container applying power, complete injection.Also, the injection device of the embodiment of the present invention all by The uncomplicated mechanical part of structure is formed, and therefore, is not only facilitated operation, can also be substantially reduced cost.

Brief description of the drawings

Fig. 1 is the schematic cross-sectional view of injection device of the embodiment of the present invention；

Fig. 2 is the first schematic diagram of the shell in injection device of the embodiment of the present invention；

Fig. 3 is the second schematic diagram of the shell in injection device of the embodiment of the present invention；

Fig. 4 is the schematic diagram of the calibration loop in injection device of the embodiment of the present invention；

Fig. 5 is the schematic diagram of the injection volume regulation ring in injection device of the embodiment of the present invention；

Fig. 6 is the schematic diagram of the upper adjusting set in injection device of the embodiment of the present invention；

Fig. 7 is the schematic diagram of the lower adjusting set in injection device of the embodiment of the present invention；

Fig. 8 is the schematic diagram of the push rod in injection device of the embodiment of the present invention；

Fig. 9 is the schematic diagram of the regulation stabilizing ring in injection device of the embodiment of the present invention；

Figure 10 is the schematic diagram of the locating ring in injection device of the embodiment of the present invention；

Figure 11 is the schematic diagram of the separating component in injection device of the embodiment of the present invention；

Figure 12 is the orthographic projection schematic diagram of the lower surface of the lower adjusting set in injection device of the embodiment of the present invention.

Embodiment

The present invention is done and further illustrated below according to Figure of description and specific Application Example.

Simple in order to state, direction as shown in Figure 1 describes injection device and its parts, i.e., above, lower section refers both to Above and below in Fig. 1.

The embodiments of the invention provide a kind of injection device, as shown in figure 1, including shell 1, calibration loop 2, injection volume regulation Ring 3, push rod 5, regulation drive sleeve 6, wherein：

The shell 1 includes the output end of connection injected material container and the dispensing end of implement injection.

The output end of the shell 1 is provided with the external screw thread (being not shown) for being used for installing injected material container.

The calibration loop 2 is located in the shell 1, and the outer surface of the calibration loop 2 is provided with and the inwall of shell 1 Circumferencial direction is fixed, the unfixed default fit structure in axial direction.

Here, the calibration loop 2 is arranged on the inwall of the shell 1, and the outer surface of calibration loop 2 is interior with the shell 1 Wall key connection, and one end is stretched out from the dispensing end of shell 1.Due to the inwall key connection of calibration loop 2 and shell 1, then calibration loop 2 It can be slid axially along shell 1, but not do circumferencial direction rotation.

As shown in Figure 2 to 4, several first splines 11 can be provided with the inwall of shell 1, correspondingly, The outer surface of calibration loop 2 is set and 11 the first keyway 21 that is corresponding and waiting quantity of the first spline；The inner chamber of the shell 1 is Cylinder, the outer surface of corresponding calibration loop 2 is in cylinder.

The injection volume regulation ring 3 is located in the calibration loop 2, and the outer surface of the injection volume regulation ring 3 and institute It is thread matching structure to state the inwall of calibration loop 2.

As shown in figure 1, injection volume regulation ring 3 is arranged in the inwall of the calibration loop 2, in outer round surface towards shell One end of 1 dispensing end is connected with the inner thread of calibration loop 2, and tooth is away from being the first rotation direction for the first value and thread rotary orientation.

As shown in Figure 1, Figure 4 and Figure 5, the inner chamber of calibration loop 2 is cylinder, and the outer surface of injection volume regulation ring 3 is also in circle Cylindricality；One end of calibration loop 2 is stretched out from the dispensing end of shell 1, and the end is at application thrust when user injects, and can be covered at the end A upper rubber sleeve or inner chamber are sealed close to the part at the end, so as to increase lifting surface area, allow user more easily to apply Thrust.

Scale mark is engraved or prints in the outer surface of calibration loop 2, the scale mark from top to bottom, is stepped up scale Value.

As shown in Figure 4, Figure 5, the first external screw thread 31 is provided with the outer surface of injection volume regulation ring 3, accordingly, in calibration loop 2 inwall is provided with the first internal thread (being not shown)；Further, the internal thread of the first external screw thread 31 and first Thread type is motion thread, i.e., tooth form be rectangle, it is trapezoidal or zigzag；Due to not stressing substantially, preferred rectangle, so pass Efficiency of movement is high, frictional force is small.The inner chamber of the calibration loop 2 is cylinder, and the corresponding outer surface of injection volume regulation ring 3 is in cylinder Shape.

The regulation drive sleeve 6 is located in the injection volume regulation ring 3, and the regulation drive sleeve 6 is provided with the note The rotation of the amount of penetrating regulation ring 3 and the transmission parts rotated；The dispensing end of the shell 1, which is provided with to coordinate, promotes the regulation drive sleeve 6 transmission parts depart from the separating component of the injection volume regulation ring 3, and the regulation drive sleeve 6 is outside with the calibration loop 2 The dispensing end of shell 1 is slided and slided.

Here, in the presence of separating component, transmission parts can depart from or connect injection volume regulation ring 3 so that regulation Drive sleeve 6 has two states with injection volume regulation ring 3：Firstth, connection status, now, regulation drive sleeve 6 are adjusted with the injection volume Save the rotation of ring 3 and rotate；Secondth, released state when, now, the rotation of injection volume regulation ring 3 is not transferred to the regulation Drive sleeve 6.

The separating component can control to adjust drive sleeve 6 and injection volume regulation ring 3 between connection status and released state Switch over.This has a variety of implementations, such as：The regulation outer surface of drive sleeve 6 is connected with the inwall of injection volume regulation ring 3 by gear Connect, by the engagement of adjustment gear whether, to realize connection or separation；Or to be provided with first convex for regulation drive sleeve 6 outer surface Rise, and the inwall of injection volume regulation ring 3 is provided with the groove passed through for first projection, and the groove whether is passed through by first projection, To realize connection or separation.

Here, it is convex to be provided with the first elasticity for one end towards the output end of shell 1 in the outer surface of the regulation drive sleeve 6 622 are played, the output end of the shell 1 is provided with the groove 13 corresponding and axially distributed with the first elastic bumps 622；Due to The first elastic bumps 622 for adjusting the outer surface of drive sleeve 6 are risen by the groove 13 of shell 1 to blocking, therefore, only regulation transmission Set 6 can just be done rotation along the circumferential direction by sufficiently large when acting on of revolving force along the circumferential direction；During due to groove 13 Axially distributed, therefore, regulation drive sleeve 6 can do sliding axially relative to shell 1.

One end of the push rod 5 is located in regulation drive sleeve 6, and the other end stretches out the output end of the shell 1, described to push away The inwall of the outer surface of bar 5 and the regulation drive sleeve 6 is threaded connection, and the output end of the shell 1, which is provided with described in limitation, to be pushed away The spline structure that bar 5 rotates；Here the tooth of the screw thread is away from being the second rotation direction for second value and thread rotary orientation.First value is more than Second value, the first rotation direction are equal to the second rotation direction.

Here, because the output end of shell 1 is provided with the spline structure for limiting the push rod 5 and rotating, therefore push rod 5 does not do phase Rotated for the circumferencial direction of shell 1, but sliding axially relative to shell 1 can be done.

In the embodiment of the present invention, as shown in FIG. 1 to 3, the outer surface of the shell 1 offers opening along the circumferential direction 12, and the inner chamber of the connection of opening 12 shell 1；The outer surface of the injection volume regulation ring 3 offers the second projection 32, And second projection 32 passes through the opening 12 of the shell 1.

Here, power circumferentially is applied to the second projection 32 in the surface can of shell 1, so that Injection volume regulation ring 3 is circumferentially rotated；And because the second projection 32 is blocked by opening 12 along the circumferential direction, therefore inject Amount regulation ring 3 does not slide axially.In order to facilitate installation, the injection volume regulation ring 3 can be dismountable, such as：Second Projection 32 is dismountable；Second projection 32 can be annular knurl.

The operation principle for the injection device that the embodiment of the present invention is provided is as follows：

1st, injection volume is adjusted

(1) as shown in figure 1, the injection device is in original state, injected material container is installed in the output end of shell 1, this When need push rod 5 and the impetus of injected material container to contact, as long as that is, the slide downward of push rod 5, injected material container will be pushed out Medicament；

(2) by adjusting separating component, the transmission parts for adjusting drive sleeve 6 are connected into the injection volume regulation ring 3, will Regulation drive sleeve 6 is arranged at connection status with injection volume regulation ring 3, and the now rotation of injection volume regulation ring 3 can drive regulation to pass The rotation of dynamic set 6；

(3) injection volume regulation ring 3 is rotated, the steering is designated as the first steering, two effects can be produced：

Firstth, because calibration loop 2 can slide axially along shell 1, but circumferencial direction rotation, injection volume tune are not done Section ring 3 can do circumferencial direction along shell 1 and rotate without sliding axially and in the injection volume regulation ring 3 and calibration loop 2 Wall is threadedly coupled, and therefore, calibration loop 2 can be relative to the upward sliding of shell 1, and there is scale mark the outer surface of calibration loop 2, user Injection volume will easily be known；

Secondth, because injection volume regulation ring 3 drives the rotation of regulation drive sleeve 6, and the outer surface of push rod 5 and the regulation The inwall of drive sleeve 6 is threaded connection, and push rod 5 is blocked by spline structure to be rotated and push rod 5 is injected thing container to withstanding And can not slide downward, therefore, regulation drive sleeve 6 can upward sliding L；

3rd, because the first rotation direction is equal to the second rotation direction, it is seen that calibration loop 2 is consistent with the glide direction of regulation drive sleeve 6, All it is upward sliding；But because the first value is more than second value, this may result in the distance kL (k of the upward sliding of calibration loop 2> 1) it is more than the distance L of the regulation upward sliding of drive sleeve 6, and the distance for adjusting the upward sliding of drive sleeve 6 is injection volume；Then scale Scale on ring 2 can more crypto set some, so as to carry out more accurate adjustment to injection volume, scale can also be increased The numeral or/and word marked on ring 2, to facilitate the bad patient of expression in the eyes to use, such as old man etc..

2nd, inject

(1) by adjusting separating component, the transmission parts for adjusting drive sleeve 6 are departed from into the injection volume regulation ring 3, will The regulation drive sleeve 6 is arranged at released state with the injection volume regulation ring 3, and now the rotation of injection volume regulation ring 3 will not It is delivered to the regulation drive sleeve 6；

(2) downward power is applied on calibration loop 2, then calibration loop 2 only does downward sliding relative to shell 1；Due to note The outer surface of the amount of penetrating regulation ring 3 is connected with the inner thread of calibration loop 2, and injection volume regulation ring 3 can do circumferencial direction along shell 1 Rotate without sliding axially, then injection volume regulation ring 3 can only be turned to along opposite with the first steering second and rotated；Due to adjusting Drive sleeve 6 is saved by revolving force along the circumferential direction, then regulation drive sleeve 6 can only sliding axially relative to shell 1, Push rod 5 is not do circumferencial direction to rotate, then the meeting of push rod 5 slide downward L, applies pressure to the impetus of injected material container, Injection medicament.

In the embodiment of the present invention, the injection device also includes regulation stabilizing ring 7, and the regulation stabilizing ring 7 is set in institute State in regulation drive sleeve 6, and the regulation stabilizing ring 7 and the regulation axial restraint of drive sleeve 6；Regulation stabilizing ring 7 court To one end of the dispensing end of shell 1 and the inwall key connection of injection volume regulation ring 3, towards one end of the output end of shell 1 and shell 1 Inner thread connects；The tooth of the screw thread is away from being the second rotation direction for second value and thread rotary orientation.

As shown in figure 9, can be set in the outer surface of regulation stabilizing ring 7 some has the second keyway 71, correspondingly, noting Setting and 71 the second spline (being not shown) that is corresponding and waiting quantity of the second keyway on the inwall of the amount of penetrating regulation ring 3, It can be seen that the rotation of injection volume regulation ring 3 can pass to regulation stabilizing ring 7 so that adjust the also concomitant rotation of stabilizing ring 7.The regulation The outer surface of stabilizing ring 7 is in cylinder.The outer surface of regulation stabilizing ring 7 sets the second external screw thread 72, then accordingly, such as Fig. 2, Fig. 3 It is shown, the second internal thread 14 is provided with the inwall of shell 1.

Here only has a hole stretched out for push rod 5 in the output end of the injection device, by regulation stabilizing ring 7 and regulation Drive sleeve 6 is enclosed in the cavity of shell 1.

Regulation stabilizing ring 7 is act as：

1st, in (3) step of regulation injection volume, in outer surface and the injection volume regulation ring 3 due to adjusting stabilizing ring 7 Wall key connection, therefore, regulation stabilizing ring 7 also can be with rotations, but the inwall of outer surface and shell 1 due to adjusting stabilizing ring 7 Threaded connection and tooth is away from being the second rotation direction for second value, rotation direction, thus adjust stabilizing ring 7 can upward sliding and the distance slided For L；Also be understood as, due to regulation stabilizing ring 7 and it is described regulation the axial restraint of drive sleeve 6, therefore, regulation stabilizing ring 7 to Upper slip can drive the regulation upward sliding of drive sleeve 6；Then now, push rod 5 will not produce any power to injected material container, then just Further ensure the security used；

2nd, in (1) step of injection, regulation stabilizing ring 7 is only transmitted circumferentially square by injection volume regulation ring 3 To revolving force effect, can just slide axially；So regulation stabilizing ring 7 serves the work of a stable regulation drive sleeve 6 With, that is, prevent adjust 6 random slide downward of drive sleeve, further increase accuracy；

3rd, in (2) step of injection, injection volume regulation ring 3 drives regulation stabilizing ring 7 to be turned to along second and rotated, and adjusts Stabilizing ring 7 is saved to downslide, and due to regulation stabilizing ring 7 and the regulation axial restraint of drive sleeve 6, will then drive regulation drive sleeve 6 slide downward L, that is, adjust stabilizing ring 7 and apply downward power to regulation drive sleeve 6.

In the embodiment of the present invention, as shown in figure 8, the circumference of the push rod 5 is provided with least one insertion whole length Flat gesture face 52, remaining is the 3rd external screw thread 51；In the output end of the shell 1, one shape of cross section and the push rod 5 are set Adaptable and activity rotation stop hole, when the output end of shell 1 installs injected material container, the rotation stop hole is completely fixed.

Here, accordingly, the 3rd internal thread being engaged with the 3rd external screw thread 51 is provided with regulation drive sleeve 6 (not Shown in figure).

Further, flat gesture face 52 can be multiple, but excessively, the area of flank can be reduced, is unfavorable for spiral fortune It is dynamic, it is two flat gesture faces 52 in the present embodiment.

3rd, reset

(1) after completing the injection, the output end of injected material container from shell 1 is unloaded；

(2) because rotation stop hole is movable, then can direct rotating push-rod, push rod upward sliding, complete refracting means Reset.

In the embodiment of the present invention, as shown in Figure 5 and Figure 6, the regulation drive sleeve 6 is towards outside one end of the dispensing end of shell 1 Side is provided with outer cylinder gear 611, and the inwall of the injection volume regulation ring 3 is provided with the inner circle matched with the outer cylinder gear 611 Gear 33, the injection volume regulation ring 3 are driven by the engagement of the outer cylinder gear 611 and inner circle gear 33 to the regulation Set 6 transmits moment of torsion.

At this point it is possible to by the engagement of outer cylinder gear 611 and inner circle gear 33 whether, come realize regulation drive sleeve 6 with Connection or separation between injection volume regulation ring 3.

In the embodiment of the present invention, as shown in Fig. 1, Fig. 6 and Fig. 7, the regulation drive sleeve 6 includes upper adjusting set 61 and lowered Section set 62, the lower adjusting set 62 is located in the upper adjusting set 61, and the lower adjusting set 62 is with the upper adjusting set 61 Rotate and rotate.

The upper adjusting set 61 is located in the inwall of the injection volume regulation ring 3, and the outer cylinder gear 611 is arranged at institute Adjusting set 61 is stated towards one end of the dispensing end of shell 1, first elastic bumps 622 are arranged in lower adjusting set 62, and institute State lower adjusting set 62 and the regulation axial restraint of stabilizing ring 7.

Alternatively, the inwall of the outer surface of the push rod 5 and the lower adjusting set 62 is threaded connection.

Alternatively, the lower adjusting set 62 and the upper key connection of adjusting set 61.Set lowering 62 outer round surface of overcoming difficulties There is the 3rd spline 621, set and 621 key-groove that is corresponding and waiting quantity of the 3rd spline on the inwall of upper adjusting set 61 612。

Here, it is necessary to keep the engagement between outer cylinder gear 611 and inner circle gear 33 during injection volume is adjusted State, when injection volume regulation ring 3 turns to along first to be rotated, adjusting set 61 and lower adjusting set 62 rotate in drive, and lower regulation Set 62 can move upwards, because lower adjusting set 62 is located in the upper adjusting set 61, so as to not influence the He of outer cylinder gear 611 Engagement between inner circle gear 33.

And, it is necessary to keep the released state between outer cylinder gear 611 and inner circle gear 33 during injection, inject Amount regulation ring 3 is turned to along second and rotated, and drives regulation drive sleeve 6 to rotate, the lower meeting of adjusting set 62 slide downward, due to lower adjusting set 62 are located in the upper adjusting set 61, so as to not influence the released state between outer cylinder gear 611 and inner circle gear 33.

In the embodiment of the present invention, as shown in Figure 1, Figure 7 shows, regulation stabilizing ring 7 inwall is provided with the first elastic flange of annular, institute State the lower outer round surface of adjusting set 62 and be provided with the first annular groove 623 matched with first elastic flange.

The elastic flange of first annular groove 623 and first is very little in the gap of axial direction, is ensured mutual Axial restraint；It should be noted that the height of the first elastic flange protrusion regulation inwall of stabilizing ring 7 is restricted , even if not so flexible, it is also possible to can not be installed in the first annular groove 623.

In the embodiment of the present invention, as shown in Figure 1, shown in Figure 11, lived in outer cylinder gear 611 towards one end of the dispensing end of shell 1 Dynamic to be connected with separating component 8, separating component 8 is arranged on the inwall of the shell 1；It is raised that the separating component 8 is provided with the 3rd 81, the axial pass trough 15 passed through for the 3rd projection 81 is provided with shell 1；It is provided with the inwall of injection volume regulation ring 3 Elastic material 9, described one end of elastic material 9 are connected to the outer cylinder gear 611 towards one end of the output end of shell 1, elastic material 9 The other end is fixed.

As shown in figure 1, the elastic material 9 can be spring；As shown in figure 11, the quantity of the 3rd projection 81 can be two Individual, then as shown in Figure 2 and Figure 3, the quantity of the groove 15 is also two.In order to make push rod suitable during injection volume is adjusted The upward sliding of profit, it is hollow vertically that the separating component 8, which must be,.The outer surface of the separating component 8 can be with cylinder Shape.

Pass through the cooperation of separating component 8 and elastic material 9, it is possible to achieve between outer cylinder gear 611 and inner circle gear 33 Engagement and separation.In order to smoothly realize engagement and separation, distance have to be larger than outside cylinder to the separating component 8 in axial sliding The thickness of gear 611.Downward power is applied to the 3rd projection 81, i.e., when separating component 8 is pressed downward, it is possible to achieve outer cylindrical gear Engagement between wheel 611 and inner circle gear 33；Upward power is applied to the 3rd projection 81, i.e., when separating component 8 is lifted upwards, Under the cooperation of elastic material 9, it is possible to achieve the separation between outer cylinder gear 611 and inner circle gear 33.

In the embodiment of the present invention, as shown in Figure 1, Figure 10 shows, the outer surface of the shell 1 is arranged with locating ring 10, described fixed Position ring 10 can do the rotation of circumferencial direction along shell 1, and can not slide axially；The outer surface of the locating ring 10 offers confession The helicla flute 101 that 3rd projection 81 passes through.

Here, because the 3rd projection 81 is blocked by groove 15, therefore, in rotational positioning ring 10, separation unit can make it that Part 8 slides axially, and then realizes, engagement and separation between outer cylinder gear 611 and inner circle gear 33.

In the embodiment of the present invention, as shown in FIG. 1 to 3, the outer round surface of shell 1 is provided with the second elastic flange of annular 16, the inwall of the locating ring 10 is provided with the second ring-shaped groove matched with second elastic flange 16.

In the embodiment of the present invention, as shown in figure 12, first elastic bumps 622 include：Along the lower adjusting set 62 The symmetrically arranged elastic equilibrium projection 6223 of outer surface circumference and elastic support arm 6222, set in the elastic end symmetrical of support arm 6222 It is equipped with triangular hill 6221.

As shown in figure 12, the quantity of elastic equilibrium projection 6223 and elastic support arm 6222 is all two, each elastic equilibrium Two triangular hills 6221 are provided with projection 6223, for whole circumference, four triangular hills 6221 and two Elastic equilibrium projection 6223 is circumferentially uniform；Correspondingly, the cross sectional shape of groove 13 is the internal gear of triangle.

It is such to have the technical effect that, in addition to it can preferably ensure not having radially and rock, also when adjusting injection volume, meeting The sensation of obvious intermittent rotary is brought to patient, that is, adjusts one section of default injection volume, has the sensation of click, and meeting on hand Sound is sent, is easy to patient to be operated in the case where not seeing push thing scale mark, because many diabetics Eyesight has very big decline；And axial movement when such structure also will not be to push produces obstruction, ensure lower adjust The normal movement of the normal movement, i.e. push rod 5 of set 62.

Further, on the basis of the structure of the elastic support arm 6222 has certain elasticity, the regulation drive sleeve Material be preferably also the big material of elasticity, will not be described here.

In summary, the injection device is entirely to be made up of mechanical part, and the structure of part is all very simple, therefore, no It is only simple to operate, and can greatly reduce cost.

The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.

Claims

1. a kind of injection device, it is characterised in that including shell, calibration loop, injection volume regulation ring, push rod and regulation drive sleeve；

The calibration loop is located in the shell, and the outer surface of the calibration loop is provided with and the outer casing inner wall circumferencial direction Fixed, the unfixed default fit structure in axial direction；The injection volume regulation ring is located in the calibration loop, and the injection volume The outer surface of regulation ring and the calibration loop inwall are thread matching structure；

The regulation drive sleeve is located in the injection volume regulation ring, and the regulation drive sleeve is provided with to be adjusted with the injection volume The rotation of ring and the transmission parts rotated；The dispensing end of the shell is provided with the transmission parts for coordinating and promoting the regulation drive sleeve Depart from the separating component of the injection volume regulation ring, the regulation drive sleeve is with dispensing end slip of the calibration loop to shell And slide；

One end of the push rod is located in regulation drive sleeve, the output end of the other end stretching shell, outside the push rod The inwall of surface and the regulation drive sleeve is threaded connection, and the output end of the shell is stopped provided with what the limitation push rod rotated Rotation structure.

2. injection device according to claim 1, it is characterised in that the injection device also includes regulation stabilizing ring, institute Regulation stabilizing ring is stated to be set in the regulation drive sleeve, and the regulation stabilizing ring and the regulation drive sleeve axial restraint； The regulation stabilizing ring is towards one end of shell dispensing end and the inwall key connection of injection volume regulation ring, towards shell output end The inner thread of one end and shell connects.

3. injection device according to claim 1, it is characterised in that the calibration loop is arranged on the inwall of the shell, The outer surface of calibration loop and the inwall key connection of the shell, and one end is stretched out from the dispensing end of shell.

4. injection device according to claim 1, it is characterised in that outside the direction in the outer surface of the regulation drive sleeve One end of shell output end is provided with the first elastic bumps, the output end of the shell be provided with it is corresponding with the first elastic bumps and Axially distributed groove.

5. injection device according to claim 1, it is characterised in that the outer surface of the shell offers along the circumferential direction Opening, and the inner chamber of shell described in the open communication；The outer surface of the injection volume regulation ring offers the second projection, and The described second raised opening for passing through the shell.

6. injection device according to claim 1, it is characterised in that the circumference of the push rod is provided with least one insertion The flat gesture face of whole length, the output end of the shell set a shape of cross section is adaptable and movable with the push rod to stop Turn hole, when the output end of shell installs injected material container, the rotation stop hole is completely fixed.

7. injection device according to claim 4, it is characterised in that the drive sleeve that adjusts is towards the one of shell dispensing end End outside is provided with outer cylinder gear, and the inwall of the injection volume regulation ring is provided with the internal-round gear matched with the outer cylinder gear Wheel, the injection volume regulation ring are turned round by the engagement of the outer cylinder gear and inner circle gear to the regulation drive sleeve transmission Square.

8. injection device according to claim 7, it is characterised in that the regulation drive sleeve includes upper adjusting set and downward Section set, it is described it is lower regulation wear be located at it is described it is upper regulation put, the lower adjusting set rotates with the rotation of the upper adjusting set；

The upper regulation wears the inwall for being located at the injection volume regulation ring, and the outer cylinder gear is arranged at the upper adjusting set Towards one end of shell dispensing end, first elastic bumps are arranged at lower regulation and put, and the lower adjusting set and regulation are steady Determine ring axial restraint.

9. injection device according to claim 8, it is characterised in that regulation stabilizing ring inwall is provided with the first elasticity of annular Flange, the lower adjusting set outer round surface are provided with the first annular groove matched with first elastic flange.

10. injection device according to claim 8, it is characterised in that in outer cylinder gear towards shell dispensing end one End is connected with separating component, and separating component is arranged on the inwall of the shell；The separating component is provided with the 3rd projection, The axial pass trough passed through for the 3rd projection is provided with shell；The inwall of injection volume regulation ring is provided with elastic material, institute State elastic material one end and be connected to the outer cylinder gear and fixed towards one end of shell output end, the other end of elastic material.

11. injection device according to claim 10, it is characterised in that the outer surface of the shell is arranged with locating ring, The locating ring does the rotation of circumferencial direction along shell, does not slide axially；The outer surface of the locating ring is offered described in confession The helicla flute that 3rd projection passes through.

12. injection device according to claim 11, it is characterised in that the shell outer round surface is provided with the second of annular Elastic flange, the inwall of the locating ring are provided with the second ring-shaped groove matched with second elastic flange.

13. injection device according to claim 8, it is characterised in that first elastic bumps include, along under described The symmetrically arranged elastic equilibrium projection of outer surface circumference of adjusting set and elastic support arm, three are symmetrically arranged with elastic leg extremities Angular projection.