CN206120870U - Injector - Google Patents

Abstract

The utility model discloses an injector, including the shell, the injection end of the one end of shell for connecting a medicament section of thick bamboo, the regulation end of the other end for adjusting injection dosage, the calibration loop is installed to the inner wall of shell, and the calibration loop surface is provided with the medicament scale mark, and the inner wall threaded connection of the surface of calibration loop and shell, adjust knob is still installed to the one end of shell, adjust knob and calibration loop fixed connection when rotating adjust knob, can drive the calibration loop and rotate, wear to establish the regulation dosage cover in the shell, one end is connected with adjust knob, when rotating adjust knob, can rotate by the volume of driving regulator cover, push rod one end wears to establish in regulation dosage cover, and the other end stretches out the injection end of shell, and the excircle and the regulation dosage of push rod overlap for threaded connection, the injection of shell end still is equipped with the restriction push rod pivoted cover that splines that resets, the injection button of adjusting the end at the shell is installed, when pressing down the injection button, the dosage cover can be promoted to adjust to the injection end movement.

Description

A kind of syringe

Technical field

The utility model is related to medical instruments field, and in particular to a kind of syringe.

Background technology

For diabetic, its blood glucose target is critically important, needs timing to pay close attention to and record, and in order to subtract The fluctuation of few patient blood glucose's index, needs by medicine control.Human insulin is a kind of well known medicine for reducing blood glucose target Thing, it must parenteral administration, could work in human body；At present, the most normal of human insulin is applied to diabetic Square formula is by hypodermic injection.

At present, hypodermic injection is used mostly the syringe of disposable or fixed dosage, but because patient needs injection Dosage depends on his blood glucose target, therefore has inconvenience in use；

Certainly, also have in the market can regulating dosage syringe, but exist the cumbersome, degree of accuracy it is not high or system Make the problem of high cost.

Utility model content

In view of this, the utility model embodiment is expected to provide a kind of syringe, can accurately adjust injection dosage, and uses Convenient, cost is not high.

To reach above-mentioned purpose, what the technical solution of the utility model was realized in：

The utility model embodiment provide a kind of syringe, including shell, calibration loop, adjusting knob, regulating dosage set, Push rod and injection button；Wherein,

One end of the shell is the dispensing end for connecting medicament cartridge, and the other end is the adjustable side for adjusting injection dosage；

The scale ring outer surface is provided with medicament scale mark, and the calibration loop is arranged on the inwall of the shell, and The outer surface of the calibration loop is connected with the inner thread of the shell；

The adjusting knob is arranged on the adjustable side of the shell, and is fixedly connected with the calibration loop, the calibration loop Rotate with the rotation of the adjusting knob；

The regulating dosage set is located in the shell, and one end is connected with the adjusting knob, the regulating dosage set Rotate with the rotation of the adjusting knob；

One end of the push rod is located in regulating dosage set, and the other end stretches out the dispensing end of the shell, the push rod Cylindrical and described regulating dosage set for threaded connection；The dispensing end of the shell is additionally provided with and limits the reset that the push rod is rotated Rotation stop set；

The injection button be arranged on the shell adjustable side, the regulating dosage set with the injection button pressing To dispensing end movement.

Preferably, the dispensing end of the shell is provided with the baffle ring of control injection dosage, and the cylindrical of the baffle ring is fixed on institute The precalculated position of outer casing inner wall is stated, the endoporus of the baffle ring is cylindrical less than regulating dosage set.

Preferably, the regulating dosage covers one end and is provided with first end face gear, and the adjusting knob is provided with and described first The second end face gear of face gear matching, the adjusting knob is by the first end face gear and second end face gear driven The regulating dosage set is rotated.

Preferably, the regulating dosage is arranged with makes first end face gear and second end face gear keep the bullet of engagement Property part.

Preferably, the regulating dosage set includes push rod nut and adjusting set, and the push rod nut is provided with and the push rod The internal thread of cooperation；The adjusting set is set on the push rod nut, drives the push rod nut rotation；The regulation wears The inwall of the calibration loop is located at, described adjusting set one end is provided with the first end face gear.

Preferably, the regulating dosage set also includes boosting spacing ring, and the boosting spacing ring includes being fixed on described pushing away Fixing end on stem nut is provided with the restriction adjusting set and axially moves with the positive stop end in the adjusting set, the positive stop end is stretched into The elastic flange of dynamic distance.

Preferably, the endoporus of the baffle ring is divided in the axial direction the first different cavity of diameter and the second cavity, and described The outside diameter preset value with diameter greater than the push rod nut of one cavity, the diameter of second cavity is less than the push rod spiral shell Female outside diameter preset value and more than the outside diameter preset value of the push rod.

Preferably, what the reset rotation stop covered is axially arranged with rotation stop hole, and the circumference of the push rod is provided with least one and passes through The flat gesture face of logical whole length, shape of cross section and the push rod in the rotation stop hole are adapted.

Preferably, one end set of the reset rotation stop set is set to described baffle ring one end, and the reset rotation stop covers the interior of one end Wall is circumferentially evenly equipped with the first block of predetermined number, the cylindrical second gear being provided with the first gear Block- matching in described baffle ring one end Block, second block matches in circumferential width with the spacing of two adjacent the first blocks.

Preferably, the injection button includes cylinder and shade, the cylinder through the adjusting knob endoporus and with The end contact of the regulating dosage set；The endoporus with diameter greater than the adjusting knob of the shade.

The syringe that the utility model embodiment is provided, including shell, one end of shell is the dispensing end for connecting medicament cartridge, The other end is the adjustable side for adjusting injection dosage；The inwall of shell is provided with calibration loop, and scale ring outer surface is provided with medicament quarter Scale designation, and the outer surface of calibration loop is connected with the inner thread of shell；One end of shell is also equipped with adjusting knob, the tune Section knob is fixedly connected with calibration loop, when adjusting knob is rotated, calibration loop can be driven to rotate；The conditioning agent being located in shell Amount set, one end is connected with adjusting knob, when adjusting knob is rotated, regulating dosage set can be driven to rotate；Push rod one end is located in In regulating dosage set, the other end stretches out the dispensing end of shell, and the cylindrical and regulating dosage set of push rod is threaded connection；The note of shell Penetrate end and be additionally provided with the reset rotation stop set for limiting push rod rotation；Installed in the injection button of shell adjustable side, when pressing injection button When, regulating dosage set can be promoted to move to dispensing end；It can be seen that, the syringe of the utility model embodiment, by adjusting knob Adjust, drive regulating dosage set, push rod and shell, the screw of calibration loop, can accurately adjust injection dosage, it is easy to use, And all frame for movement is used, without using electronic control part, low cost.

Description of the drawings

Fig. 1 is the cross-sectional schematic of the utility model embodiment syringe；

Fig. 2 is the profile schematic perspective view of the utility model embodiment syringe；

Fig. 3 is the schematic diagram of the utility model embodiment syringe removal regulating dosage set and push rod；

Fig. 4 is regulating dosage set and the cross-sectional schematic of push rod combination in the utility model embodiment syringe；

Fig. 5 is the schematic diagram of the adjusting knob in the utility model embodiment syringe；

Fig. 6 is the schematic diagram of the adjusting set in the utility model embodiment syringe；

Fig. 7 is the schematic diagram of the push rod nut in the utility model embodiment syringe；

Fig. 8 is the schematic diagram of the push rod in the utility model embodiment syringe；

Fig. 9 is the schematic diagram of the reset rotation stop set in the utility model embodiment syringe；

Figure 10 is the schematic diagram of the baffle ring in the utility model embodiment syringe；

Figure 11 is the end face orthographic projection schematic diagram of the regulating dosage set in the utility model embodiment syringe.

Specific embodiment

Syringe in the utility model embodiment, including：Shell, calibration loop, adjusting knob, regulating dosage set, push rod And injection button；Wherein, one end of the shell is the dispensing end for connecting medicament cartridge, and the other end is the regulation for adjusting injection dosage End；The scale ring outer surface is provided with medicament scale mark, installed in the inwall of the shell, and the appearance of the calibration loop Face is connected with the inner thread of the shell；The adjusting knob be arranged on the shell adjustable side, and with the calibration loop It is fixedly connected, when the adjusting knob is rotated, the calibration loop can be driven to rotate；The regulating dosage set is located in described outer In shell, one end is connected with the adjusting knob, when the adjusting knob is rotated, the regulating dosage set can be driven to rotate；Institute The one end for stating push rod is located in regulating dosage set, and the other end stretches out the dispensing end of the shell, the cylindrical and institute of the push rod Regulating dosage set is stated for threaded connection；The dispensing end of the shell is additionally provided with and limits the reset rotation stop set that the push rod is rotated；Institute State injection button installed in the shell adjustable side, when press the injection button when, can promote the regulating dosage set to Dispensing end is moved.

The course of work of the utility model embodiment includes installing medicament cartridge, adjusts injection dosage, injection and reset, specifically Operation principle it is as follows：

1) medicament cartridge is installed, the medicament cartridge can be one, i.e., for the medicament storehouse fixed with syringe shell and Flask for medicinal preparations is one, is directly loaded onto, and has injected direct discarding, is disposable；Can also be split, i.e., first load onto Medicament storehouse, is loaded on flask for medicinal preparations, has injected, and abandons flask for medicinal preparations, and medicament storehouse can recycle；Dispensing end of the medicament cartridge from shell Loading, to reset rotation stop set extruding is produced, and reset rotation stop set is rotated, and specific implementation sees below the application for providing in fact Apply example；

2) injection dosage is adjusted, rotates adjusting knob, make adjustable side spiral of the adjusting knob to shell, adjusting knob Rotation, can drive regulating dosage set rotate, due to regulating dosage set with push rod be threadedly coupled, but the rotation of push rod is answered Position rotation stop set is limited, and the head of push rod has withstood the piston of medicament cartridge, and resistance is larger, it is impossible to move axially to dispensing end, i.e.,： Cannot rotate, cannot move, so regulating dosage set can cover court to the regulation extreme direction spiral of shell, such regulating dosage The dispensing end of one end and shell to shell dispensing end can produce a certain distance with the spiral that regulating dosage covers, this Distance determines injection dosage；Simultaneously adjusting knob is fixedly connected with calibration loop, thus calibration loop also can spiral, carve The distance that the distance and regulating dosage set of degree ring movement are mobile has certain proportionate relationship, and the outer wall of calibration loop is provided with medicament Scale mark, so by the reading window of shell, just can know that the dosage of injection；

In order that injection dosage is more accurate, the pitch of the screw thread of the calibration loop is more than the screw thread of regulating dosage set Pitch, the displacement that can thus cover regulating dosage is amplified by calibration loop, and medicament scale mark is more accurate.

3) inject, press injection button, injection button can promote regulating dosage set to move to the dispensing end of shell, conditioning agent Amount set and push rod threaded connection, will also promote push rod to move, until regulating dosage set withstands towards one end of shell dispensing end Shell, completes the injection of setting dosage；Simultaneously injection button when moving down also can squeeze adjustments knob, and then drive scale Ring makees spiral decline, scale zero.

Note：If the medicine of medicament cartridge has not been injected, reset rotation stop set can not be rotated, that is, medicament cartridge is best Should not disassemble, can otherwise affect the accuracy of medicament injection volume.

4) reset, the drug injection of medicament cartridge is complete, dismantle medicament cartridge, unclamp reset rotation stop set, manual rotation push rod makes to push away Bar to the adjustable side of shell is moved, and returns to the position before not injecting, and can typically arrange stop bit part, and push rod is returned to before not injecting Position just stops, it is impossible to rotates or mobile, is specifically shown in Application Example described below；

In addition, in order to ensure that on the market most pharmaceutical agents cylinder can have been injected, push rod needs the long enough of design, so Can consider that regulating dosage is cased with enough cavitys during design, to accommodate push rod.

The utility model embodiment is mainly used in diabetic, but those skilled in the art is understood that, can be used for Other patients, will not be described here.

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

Simple in order to state, describing syringe and its parts, i.e., top, lower section refer both to Fig. 1 for direction as shown in Figure 1 In above and below.

As Figure 1-4, a kind of syringe, including shell 1, the lower end of the shell 1 is the dispensing end for connecting medicament cartridge, Upper end is the adjustable side for adjusting injection dosage；The inwall of the shell 1 is provided with calibration loop 2：The outer surface of the calibration loop 2 is provided with Medicament scale mark, and the outer surface of the calibration loop 2 is connected with the inner thread of the shell 1, the i.e. outer surface of calibration loop 2 External screw thread is provided with, the inwall of shell 1 is provided with internal thread；

Further, the thread type of the inwall of the outer surface of calibration loop 2 and shell 1 is motion thread, i.e., tooth form is square Shape, trapezoidal or zigzag, due to not stressing substantially, preferred rectangle, such transmission efficiency, frictional force are little.

As shown in Fig. 2 the adjustable side of the shell 1 is provided with adjusting knob 3, the adjusting knob 3 and the calibration loop 2 It is fixedly connected, when the adjusting knob 3 is rotated, the calibration loop 2 can be driven to rotate；

Specifically, in original state, that is, calibration loop 2, when being zero-bit, the lower end of calibration loop 2 is the note for withstanding shell 1 Penetrate the inner bottom surface at end, that is, adjusting knob 3 can only drive calibration loop 2 to do spiral upwards；

The dispensing end of the shell 1 is used to install medicament cartridge, and it is provided with the external screw thread 12 for installing the medicament cartridge, for table What is reached is succinct, and the medicament cartridge is not shown.

As shown in figure 5, the adjusting knob 3 is provided with draw-in groove 32, the calibration loop 2 is provided with the card base for inserting the draw-in groove (not shown), after installation, adjusting knob 3 and calibration loop 2 are secured to together, be synchronized with the movement；

Further, draw-in groove 32 is circumferentially being laid with 3, and corresponding, the card base also is provided with three, so, Fixed is more reliable, it is easier to transmitting torque；

The outer surface of adjusting knob is provided with the annular knurl 33 for increasing frictional force, and the type of annular knurl has a lot, is not construed as limiting.

As shown in Fig. 2 the surface of the shell 1 is provided with reading window 11, it can be seen that the medicament of the outer surface of calibration loop 2 is carved Scale designation, the medicament scale mark is arranged by helix, and from top to bottom, is stepped up scale value；

As shown in figure 1, be additionally provided with the inner chamber of the shell 1 regulating dosage set 4, the regulating dosage set upper side with it is described Adjusting knob 3 connects, and when the adjusting knob 3 is rotated, the regulating dosage set can be driven to rotate.

Specifically, as shown in Figure 4 and Figure 5, the regulating dosage set upper side is provided with first end face gear 413, the regulation Knob 3 is provided with the second end face gear 31 matched with the first end face gear 413, and the adjusting knob 3 passes through described first The engagement of face gear 413 and second end face gear 31 drives the regulating dosage set to rotate；

Specifically, the cross sectional shape of the tooth of the first end face gear 413 and second end face gear 31 is rectangle or trapezoidal, And the outer end for the ease of the tooth of smoothly engagement, first end face gear 413 and second end face gear 31 is circular arc.

Further, in order that first end face gear 413 and second end face gear 31 keep suitable precompression, keep just Normal engagement, the regulating dosage is arranged with makes first end face gear 413 and second end face gear 31 keep engagement Elastomeric element 44；

Specifically, the elastomeric element 44 can be compression spring, and line footpath, pitch of the compression spring etc. can bases The precompression design of needs, as such, it is possible to obtain relatively accurate precompressed force value.

For the ease of processing, the regulating dosage set is not integrally formed, but including push rod nut 42 and adjusting set 41, see Fig. 6 and Fig. 7；

The adjusting set 41 is set on the push rod nut 42, and the push rod nut 42 can be driven to rotate；

Specifically, as shown in Figure 6,7, the outer surface of the upper end of push rod nut 42 is provided with key 421, and the inwall of adjusting set 41 sets There is keyway 414, drive push rod nut 42 to rotate by key and the cooperation transmitting torque of keyway, i.e. adjusting set 41；

Further, the key can be spline, and the spline of 4 keys is employed in the present embodiment, and such transmitting torque is put down Surely, and also relatively convenient is processed；

The adjusting set 41 is located in the inwall of the calibration loop 2, and its upper end is provided with the first end face gear 413.

In order that the good engagement of first end face gear 413 and second end face gear 31, in the present embodiment, push rod nut 42 Do not fix in the axial direction with adjusting set 41, in order in injection, be delivered to the thrust of injection button by adjusting set 41 and be pushed away Stem nut 42, is delivered to push rod then, embodiment adds a boosting spacing ring 43, as shown in figure 4, the boosting is spacing Ring 43 includes the fixing end being fixed on the push rod nut 42 and stretches into the positive stop end in the adjusting set 41；

The adjusting set 41 is provided with the 3rd cavity 411 that accommodates the boosting spacing ring 43 and accommodates the of push rod nut 42 Four cavitys 412, the 3rd cavity is not mutually connected in the periphery of the 4th cavity；

So in injection, injection button promotes adjusting set 41 to move downward, and the roof of the 3rd cavity 411 can withstand described helping The positive stop end of spacing ring 43 is pushed away, promotes boosting spacing ring to move downward, moving downward for push rod nut 42 is so just promoted simultaneously.

Further, the boosting spacing ring is arranged with the elastomeric element 44, and the upper end of the elastomeric element 44 is withstood The adjusting set 41, to adjusting set 41 apply an elastic force upwards, due to adjusting set 41 in the axial direction with push rod nut 42 Do not fix with boosting spacing ring, it is possible to independent axially moves, it is ensured that first end face gear 413 and second end face gear 31 good engagement.

The positive stop end is provided with and limits the elastic flange 431 that the adjusting set 41 moves axially distance；The elastic flange Effect be adjust injection dosage when, when adjusting set 41 moves upward to certain position, can be blocked by the elastic flange, this Will not move up excessive of sample adjusting set 41 and calibration loop 2 and depart from shell 1；The elastic flange is similar to the shape of a barb Shape, limits adjusting set 41, and the bottom of the 3rd cavity is provided with the blocker ring matched with the elastic flange, the blocker ring Can fill with the one of adjusting set 41, or afterwards；Elastic flange has certain elasticity, and head is arranged to cone Shape, is so easily installed in the 3rd cavity.

It is exactly in the present embodiment to be equipped with push rod nut 42 as shown in figure 4, being equipped with push rod 5 in regulating dosage set Push rod 5, the upper end of the push rod 5 is located in regulating dosage set, and the dispensing end of the shell 1 is stretched out in lower end, outside the push rod 5 Circle and regulating dosage set are threaded connection；

Further, the internal thread of regulating dosage set and the externally threaded thread type of push rod 5 are motion threads, i.e., Tooth form is rectangle, trapezoidal or zigzag, and in order to more resistant, preferably trapezoidal, such transmission efficiency is higher, long service life.

According to the principle of the present embodiment, push rod 5 is in regulating dosage, it is impossible to rotate, so the dispensing end of the shell 1 sets The reset rotation stop set 6 that the restricted push rod 5 is rotated；

As shown in FIG. 8 and 9, reset rotation stop set 6 is axially arranged with rotation stop hole 61, and the circumference of the push rod 5 is provided with The flat gesture face 52 of at least one insertion whole length, remaining be external screw thread face 53, the shape of cross section in the rotation stop hole with it is described Push rod 5 is adapted, as long as so reset rotation stop set 6 is not rotated, push rod 5 just cannot be rotated；

Further, flat gesture face can be multiple, but excessively, can reduce the area of flank, be unfavorable for screw, It is two flat gesture faces in the present embodiment；

Further, push rod 5 is provided with push rod cup 51, when effect is to reset, push rod upwards screw when, push rod cup is touched To reset rotation stop set, push rod returns to the position before injecting, and completes to reset；The push rod cup is exactly the stop bit zero said in principle Part.

As shown in figure 3, the dispensing end of the shell 1 be provided with control injection dosage baffle ring 8, the baffle ring 8 it is cylindrical solid The precalculated position of the inwall of the shell 1 is scheduled on, for after default injection dosage is completed, preventing regulating dosage set, that is, Push rod 5 is moved further downward, that is, when calibration loop 2 is in zero-bit, push rod 5 cannot be moved down；

In order to arrange such function, cylindrical, such regulating dosage of the endoporus of the baffle ring 8 less than regulating dosage set The lower end of set cannot pass through from the endoporus of baffle ring 8, prop up the upper end of the baffle ring 8 with regard to stop motion, and injection also just stops.

Further, in order to limit the rotation that reset rotation stop covers 6, the upper end of the reset rotation stop set is arranged to be arranged Inwall to the lower end of the baffle ring 8, and reset rotation stop set 6 is circumferentially evenly equipped with the first block 62 of predetermined number, the gear The lower end of ring 8 is cylindrical to be provided with the second block 81 matched with first block 62, and second block is in circumferential width and phase The spacing of two adjacent the first blocks matches, and is specifically shown in Fig. 9 and Figure 10；The inwall of reset rotation stop set 6 is circumferentially evenly equipped with default First block of quantity is similar to internal gear, and the similar external gear of cylindrical the second block being provided with the lower end of baffle ring 8, after both assemble Similar meshing relation, but it is not intended to what is be driven, but prevent what is rotated；The method of prevention is exactly that the dispensing end of shell loads medicine Agent cylinder (not shown), medicament cartridge upwardly reset rotation stop set 6, the first block 62 of reset rotation stop set and the of baffle ring 8 Two block 81 enter engagement, baffle ring be it is fixed, therefore reset rotation stop set just cannot rotate；And after medicament cartridge dismounting, reset stops Pivoted housing can be moved down, and the first block 62 and the second block 81 are disengaged from, and reset rotation stop set can be rotated, and also would not be hindered Hinder when resetting, the screw upwards of push rod.

Outer end for the ease of assembling, the first block and the second block is arranged to circular arc.

Further, the endoporus of the baffle ring 8 is divided in the axial direction the first different cavity 83 of diameter and the second cavity 84, the outside diameter preset value with diameter greater than the push rod nut 42 of first cavity, the diameter of second cavity is little In the outside diameter preset value of the push rod nut 42, and more than the outside diameter preset value of the push rod 5；

The diameter of second cavity less than the push rod nut 42 outside diameter preset value, exactly for completing pre- If injection dosage after, prevent regulating dosage set move down, so the diameter of second cavity be less than the push rod spiral shell Female 42 outside diameter preset value is as big as possible, but can not affect passing through for push rod 5；

The outside diameter preset value with diameter greater than the push rod nut 42 of first cavity 83, primarily to making tune When the rotation and movement of section dosage set, radially do not have and rock, i.e., the lower end of described regulating dosage set can stretch into the gear First cavity of ring 8, and the regulating dosage covers cylindrical and the first cavity gap very little of lower end, can so rotate and move It is dynamic, radially there will not be and rock；

Further, elasticity zero can be set on the cylindrical upper or inwall of the first cavity of the regulating dosage set lower end Part, such as elastic steel ball, so can further ensure radially not have and rock；

Further, it is the internal gear 82 of triangle that the inwall of first cavity 83 is provided with cross sectional shape, and is adjusted Dosage set lower end is provided with the triangular hill that multiple triangular-sections with the internal gear match；

Specifically see that Figure 11, Figure 11 are the end face orthographic drawing (looking up from underface) of regulating dosage set, as illustrated, The lower end of regulating dosage set includes triangular hill 422, elastic support arm 423, wherein elastic equilibrium projection 424, triangular hill 4 are provided with, are separately positioned on 2 elastic support arms, elastic equilibrium projection 2 is distributed on circumference, from for whole circumference, 4 Triangular hill and 2 elastic equilibrium projections are circumferentially uniform；It is such to have the technical effect that, except can preferably ensure radially Do not have and rock outer, also when injection dosage is adjusted, the sensation of obvious intermittent rotary can be brought to patient, that is, adjust one section in advance If dosage, the sensation of click is had on hand, and sound can be sent, be easy to patient in the case where medicament scale mark is not seen Operated, because the eyesight of many diabetics has very big decline；And such structure also will not be to during injection Axial movement produce obstruction, it is ensured that the normal movement of regulating dosage set, the i.e. normal movement of push rod 5；

Further, on the basis of the elastic support arm 423 has certain elasticity in structure, the regulating dosage set Material is preferably also the big material of elasticity, will not be described here.

The adjustable side of the shell 1 is provided with injection button 7, when the injection button is pressed, can promote the regulation Dosage set 4 is moved to dispensing end；

Wherein, the injection button 7 includes cylinder and shade, and the cylinder can pass through the endoporus of the adjusting knob 3, squeeze Press the upper surface of the regulating dosage set；The endoporus with diameter greater than the adjusting knob 3 of the shade；

Specifically, the adjusting knob 3 is provided with the through hole passed through for the cylinder of injection button, described so in injection The cylinder of injection button passes through the adjusting knob 3, extrudes the upper surface of the regulating dosage set, regulating dosage is covered downwards It is mobile；

In the present embodiment, in injection, the cylinder of the injection button extrudes the upper surface of the adjusting set 41, a side Face moves downward adjusting set 41, drives the injection movement of push rod 5, on the other hand, makes the first end face gear 413 of adjusting set 41 State is disengaged from the second end face gear 31 of adjusting knob 3；So, due to the injection button shade with diameter greater than The endoporus of the adjusting knob 3, while injection, the shade of the injection button produces extruding to adjusting knob 3, makes regulation Knob 3 is spinned descending motion together with calibration loop 2, makes scale be zeroed.

The above, preferred embodiment only of the present utility model is not intended to limit protection of the present utility model Scope, all any modification, equivalent and improvement made within spirit of the present utility model and principle etc., should be included in Within protection domain of the present utility model.

Claims (10)

1. a kind of syringe, it is characterised in that press including shell, calibration loop, adjusting knob, regulating dosage set, push rod and injection Button；Wherein,

One end of the shell is the dispensing end for connecting medicament cartridge, and the other end is the adjustable side for adjusting injection dosage；

The scale ring outer surface is provided with medicament scale mark, and the calibration loop is arranged on the inwall of the shell, and described The outer surface of calibration loop is connected with the inner thread of the shell；

The adjusting knob is arranged on the adjustable side of the shell, and is fixedly connected with the calibration loop, and the calibration loop is with institute State the rotation of adjusting knob and rotate；

The regulating dosage set is located in the shell, and one end is connected with the adjusting knob, and the regulating dosage set is with institute State the rotation of adjusting knob and rotate；

One end of the push rod is located in regulating dosage set, and the other end stretches out the dispensing end of the shell, outside the push rod Circle and regulating dosage set are threaded connection；The dispensing end of the shell is additionally provided with and limits the reset rotation stop that the push rod is rotated Set；

The injection button is arranged on the adjustable side of the shell, and the regulating dosage set is with the injection button by pressing to note Penetrate end movement.

2. syringe according to claim 1, it is characterised in that the dispensing end of the shell is provided with control injection dosage Baffle ring, the cylindrical precalculated position for being fixed on the outer casing inner wall of the baffle ring, the endoporus of the baffle ring is less than the conditioning agent It is cylindrical that amount covers.

3. syringe according to claim 1, it is characterised in that the regulating dosage covers one end and is provided with first end face tooth Wheel, the adjusting knob is provided with the second end face gear with the first end face gear matches, and the adjusting knob is by described First end face gear and regulating dosage set rotation described in second end face gear driven.

4. syringe according to claim 3, it is characterised in that the regulating dosage be arranged with make first end face gear and Second end face gear keeps the elastomeric element of engagement.

5. the syringe according to claim 3 or 4, it is characterised in that the regulating dosage set includes push rod nut and tune Section set, the push rod nut is provided with the internal thread coordinated with the push rod；The adjusting set is set on the push rod nut, band Move the push rod nut rotation；The adjusting set is located in the inwall of the calibration loop, and described adjusting set one end is provided with described End face gear.

6. syringe according to claim 5, it is characterised in that the regulating dosage set also includes boosting spacing ring, institute Stating boosting spacing ring includes the fixing end being fixed on the push rod nut and stretches into the positive stop end in the adjusting set, the limit Position end is provided with and limits the elastic flange that the adjusting set moves axially distance.

7. syringe according to claim 2, it is characterised in that it is different that the endoporus of the baffle ring is divided in the axial direction diameter The first cavity and the second cavity, the outside diameter preset value with diameter greater than the push rod nut of first cavity is described The diameter of the second cavity is less than the outside diameter preset value of the push rod nut and more than the outside diameter preset value of the push rod.

8. syringe according to claim 2, it is characterised in that the reset rotation stop set is axially arranged with rotation stop hole, institute The circumference for stating push rod is provided with the flat gesture face of at least one insertion whole length, and the shape of cross section in the rotation stop hole is pushed away with described Bar is adapted.

9. syringe according to claim 8, it is characterised in that one end set of the reset rotation stop set is set to the baffle ring One end, the reset rotation stop covers the first block that the inwall of one end is circumferentially evenly equipped with predetermined number, and described baffle ring one end is cylindrical to be set There is the second block with the first gear Block- matching, second block is in circumferential width and two adjacent the first blocks Spacing matches.

10. syringe according to claim 9, it is characterised in that the injection button includes cylinder and shade, the post The end contact that body passes through the endoporus of the adjusting knob and covers with the regulating dosage；The shade with diameter greater than described The endoporus of adjusting knob.