CN111084918A - Syringe with injection dosage adjusting function - Google Patents
Syringe with injection dosage adjusting function Download PDFInfo
- Publication number
- CN111084918A CN111084918A CN201811240033.8A CN201811240033A CN111084918A CN 111084918 A CN111084918 A CN 111084918A CN 201811240033 A CN201811240033 A CN 201811240033A CN 111084918 A CN111084918 A CN 111084918A
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- Prior art keywords
- nut
- base
- zero
- knob
- housing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
- A61M2205/581—Means for facilitating use, e.g. by people with impaired vision by audible feedback
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention provides an injector with injection dose adjusting function, which comprises a medicine bottle connecting device and an adjustable propelling device, wherein a medicine bottle is connected with the medicine bottle connecting device through the medicine bottle connecting device, the adjustable propelling device is arranged in the medicine bottle connecting device and extends into the medicine bottle, a rotating button of the medicine bottle connecting device can drive a push rod of the adjustable propelling device to move backwards to a preset scale, and when in injection, the medicine bottle can output liquid medicine with preset dose by pressing the push rod, so that the injector can adjust the injection dose according to the requirements of different injection objects.
Description
Technical Field
The present invention relates to an injector, and more particularly, to an injector capable of combining a medicine bottle containing a medicine solution and having an injection dose adjusting function.
Background
Existing syringes have been equipped with metering-type injection functionality based on safety regulations for pharmaceutical injections. That is, after the metering injection pen is assembled into the medicine bottle, the plunger in the medicine bottle is pushed to move for a certain stroke distance by the action of the push rod pressing the rear end of the injector through the linkage control of the internal driving mechanism, and then the medicine liquid with the preset dosage is output through the needle head.
However, although the metering syringe can provide the function of outputting a fixed dose of medicinal solution, the injection dose of the syringe is usually adjusted according to the requirements of different injection subjects during the use process. The existing metering injector is difficult to meet the requirements of different users due to the lack of the function of adjusting the injection dosage.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides an injector with injection dose adjustment function, solves the problem that current injector can't adjust injection dose according to the demand of different injection objects.
The technical solution proposed by the invention is as follows: the utility model provides an injector with injection dosage adjusting function, which is characterized in that the injector comprises a medicine bottle connecting device and an adjustable propelling device; wherein:
this medicine bottle connecting device includes:
a housing, which comprises a housing base, a medicine bottle assembly part and a combination tube part, wherein the medicine bottle assembly part and the combination tube part are respectively formed at the front end and the rear end of the housing base, a housing central hole which is through from front to back is formed in the housing, an assembly groove is formed in the medicine bottle assembly part, and the assembly groove is communicated with the housing central hole and is in a side opening shape;
the knob comprises a knob shell, a knob inner plate, a knob inner tube and an inner hole, wherein the knob inner plate is formed inside the knob shell, the knob inner tube is positioned inside the knob shell, the knob inner tube is connected with the front end of the knob inner plate, and the inner hole is formed in the knob inner tube and the knob inner plate; and
the return-to-zero nut base is connected with the rear section of the shell of the rotating button and comprises a base part, an assembling end part, a group of connecting pipe parts and a nut inner pipe part, wherein the assembling end part and the assembling pipe part are respectively formed at the front end and the rear end of the base part, and an inner shaft hole is formed in the return-to-zero nut base;
the adjustable propulsion device can be arranged in the medicine bottle connecting device, and comprises:
the screw comprises a screw body and a rubber plug connecting end part formed at the front end of the screw body, wherein a plurality of bolt connection units are formed on the outer peripheral surface of the screw body and are arranged in sequence at equal intervals along the axial direction of the screw body, an annular groove is formed between every two adjacent bolt connection units, a spiral groove is formed in each bolt connection unit, and the front end and the rear end of the spiral groove of each bolt connection unit are respectively connected with the annular grooves at the front position and the rear position; and
the push rod group is arranged in the zero-returning nut base, the push rod can move linearly relative to the zero-returning nut base, the push rod can rotate together with the zero-returning nut base, a push rod middle hole is formed in the push rod, scales are formed on the outer peripheral surface of the push rod, a screwed part is formed on the push rod on the hole wall of the push rod middle hole, the screw rod is assembled in the push rod middle hole of the push rod, the screwed part of the push rod is in screwed connection with the spiral groove of the screw rod, the screw rod can rotate and move front and back in the push rod, the push rod is provided with a pushing arm, the front end of the pushing arm is a free end, and the pushing arm can extend into the annular groove of the screw rod and push against the end face of the screwed unit.
In the above-mentioned injector with injection dose adjusting function, the back of the base of the casing forms two unidirectional snaps corresponding to the outer side of the connecting tube, the inner peripheral wall of the front section of the turn button casing forms two unidirectional snap grooves, and the two unidirectional snaps can be respectively snapped in the two unidirectional snap grooves.
In the above-mentioned syringe having an injection dose adjusting function, the inner axial hole wall of the return-to-zero nut base has a guide groove portion extending in the front-rear axial direction, the outer peripheral surface of the push rod has a guide rail portion extending in the front-rear axial direction, the guide rail portion is correspondingly matched with the guide groove portion in the return-to-zero nut base, so that the push rod can move linearly relative to the return-to-zero nut base, and the push rod can rotate together with the return-to-zero nut base.
In the above syringe with injection dosage adjustment function, the screw further has a stopper between the plug connection end and the screw body, and the stopper of the screw can be located at the front end of the push rod for limitation.
In the above-mentioned syringe having an injection dose adjusting function, the inner axial hole wall of the return-to-zero nut base has a guide groove portion extending in the front-rear axial direction, the outer peripheral surface of the push rod has a guide rail portion extending in the front-rear axial direction, the guide rail portion is correspondingly matched with the guide groove portion in the return-to-zero nut base, so that the push rod can move linearly relative to the return-to-zero nut base, and the push rod can rotate together with the return-to-zero nut base.
In the above-mentioned syringe with injection dose adjusting function, the inner peripheral wall of the turn button shell of the turn button is provided with a clamping part relative to the back of the inner plate of the turn button; the assembly pipe part of the return-to-zero nut base is respectively formed at the front end and the rear end of the base part, the outer peripheral surface of the assembly end part forms a pivot ring groove and a clamping ring groove which are arranged at intervals front and back, the outer peripheral surface of the assembly pipe part forms a screw thread, the nut inner pipe part is arranged in the assembly end part, the nut inner pipe part extends forwards from the base part, the front end of the nut inner pipe part forms a second locking part, the second locking part is provided with a plurality of locking concave edges, the assembly end part of the return-to-zero nut base can be assembled in the rear section of the shell of the turn button, the clamping part of the turn button can be selectively clamped in any one of the pivot ring groove and the clamping ring groove, and the second locking part at the front end of the nut inner pipe part of the return-to-zero nut base can be locked by concave-convex matching with the first locking part at; this medicine bottle connecting device still includes a zero-reset nut and a nut stationary blade, wherein: the zeroing nut is internally provided with a screwed hole, the zeroing nut forms a screwed strip on the hole wall of the screwed hole, a vacant part is formed in the screwed strip, the peripheral wall of the zeroing nut forms a pivoting hole, the pivoting hole is correspondingly connected with the vacant part, the rear end of the zeroing nut forms a first meshing part, the zeroing nut is screwed outside the assembling pipe part of the zeroing nut base, and the screwed strip is in screwed fit with the screwed thread; the nut fixing piece comprises a piece body, a pivot column and a convex strip part, wherein the pivot column is arranged on one end side face of the piece body, the convex strip part is positioned at the other end of the pivot column relative to the piece body, the nut fixing piece is pivoted in a pivot hole of the zero returning nut through the pivot column, the piece body is positioned on the outer side face of the zero returning nut, the convex strip part is positioned at a vacant part of a screw strip of the zero returning nut, and the nut fixing piece can rotate relative to the zero returning nut so that the convex strip part can change positions at the vacant part of the screw strip; the adjustable propelling device is provided with a bottom fluted disc at the rear end of the push rod, the front end surface of the bottom fluted disc forms a second meshing part, and the second meshing part can be selectively meshed with the first meshing part at the rear end of the return-to-zero nut relatively.
In the above-mentioned syringe with injection dose adjusting function, the outer peripheral surface of the zeroing nut is provided with a first positioning concave edge and a second positioning concave edge at two different sides of the pivot hole, the side of the sheet body of the nut fixing sheet facing the zeroing nut is provided with a positioning flange, and the positioning flange can be selectively clamped on the first positioning concave edge and the second positioning concave edge along with the rotation of the nut fixing sheet.
In the above-mentioned injector with injection dose adjusting function, the outer casing is provided with an indication mark on the outer peripheral surface of the base portion of the outer casing, the knob can be provided with a marking line on the outer peripheral surface of the knob housing, and the marking line can be matched with the indication mark of the outer casing.
In the above-mentioned syringe with injection dose adjusting function, the outer peripheral surface of the zero-returning nut base is provided with a rotation direction indicating mark for indicating the rotation direction.
The invention has the advantages that the injector with the injection dose adjusting function mainly utilizes the combined structure of the medicine bottle connecting device and the adjustable propelling device to ensure that the medicine bottle connecting device is assembled with the medicine bottle and then arranged on the adjustable propelling device, namely, the push rod of the adjustable propelling device is driven to move backwards to the preset scale by utilizing the turn button of the medicine bottle connecting device, and the push rod is pressed to ensure that the medicine bottle outputs the liquid medicine with the preset dose during injection, so the injector can adjust the injection dose according to the requirements of different injection objects.
The injector further utilizes the push rod of the rotary adjustable propelling device to drive the screw rod screwed in the push rod to spirally move forwards by the rotating force of the push rod until the connecting end part of the rubber plug at the front end of the screw rod is abutted against the rubber plug in the medicine bottle, and then the return-to-zero nut base is pressed forwards into the rotating button to be in a locking state. Then, the return-to-zero nut is rotated along the needle until the return-to-zero nut is contacted with the bottom toothed disc at the rear end of the push rod to be relatively meshed, and then the fixing piece of the rotary nut is rotated to rotate, so that the return-to-zero nut is fixed on the return-to-zero nut base to complete return-to-zero, and the injector has the initial return-to-zero function during injection dosage adjustment, thereby ensuring that the injection dosage is adjusted more accurately.
Drawings
Fig. 1 is a perspective exploded view of a vial attachment device and an adjustable drive mechanism in a preferred embodiment of the injector of the present invention.
Fig. 2 is an exploded perspective view of the vial attachment device of fig. 1.
Figure 3 is an exploded perspective view of the vial attachment device of figure 1 from another viewing angle.
Fig. 4 is a perspective exploded view of the housing and the knob of the vial connecting device shown in fig. 2 and 3.
Fig. 5 is a sectional view of the combination of the housing, the knob and the zero nut base of the vial attachment device of fig. 1-3.
FIG. 6 is a schematic cross-sectional end view of the cut line A-A shown in FIG. 5.
Fig. 7 is a side cross-sectional view of the turn button and the return-to-zero nut base of the vial attachment device of fig. 1-3 prior to locking.
Fig. 8 is a perspective view of the zero-return nut and nut retaining tab of the vial connecting device of fig. 1-3 prior to locking.
Fig. 9 is a perspective view of the zero-reset nut and nut retaining plate of the vial connecting device shown in fig. 1-3 after locking.
Fig. 10 is an exploded perspective view of the adjustable propulsion device shown in fig. 1.
FIG. 11 is a perspective exploded view of the adjustable propulsion device shown in FIG. 1 from another viewing angle.
Figure 12 is an exploded view of the vial prior to assembly of the vial in the vial attachment device.
Fig. 13 is a perspective exploded view of the adjustable propulsion device after the vial connecting device is assembled with the vial.
Fig. 14-16 are schematic views illustrating the operation of the syringe for zeroing adjustment according to the present invention.
Fig. 17 and 18 are schematic views illustrating the operation of locking the zero nut to the zero nut base by the nut fixing piece after the zero adjustment of the injector of the present invention.
FIG. 19 is a schematic sectional side view of the syringe combined with the vial of the present invention after the zero adjustment.
Fig. 20 is a partially enlarged schematic view of fig. 19.
Fig. 21 and 22 are schematic views illustrating the operation of the injector according to the present invention to adjust the injection dose.
Fig. 23 is a schematic sectional view showing the completion of adjustment of the injection dose by the syringe of the present invention.
Description of the reference numerals
1 Syringe 2 medicine bottle
2A bottle body and 2B rubber plug
3 medicine bottle connecting device 4 adjustable propelling device
10 housing 11 housing base
12 medicine bottle assembling part 13 combining tube part
131 recess 132 position-limiting flange
14 side wing part 15 casing central hole
16 assembly groove 17 one-way spring fastener
18 indicating mark 20 turning knob
21 knob housing 211 front housing section
212 shell rear section 213 one-way catching groove
22 inner plate of knob 23 inner tube of knob
24 inner hole 241 ring stop part
25 first locking portion 251 locks the flange
26 snap-in part 27 marking line
30-return-to-zero nut base 31 rotation direction indicating mark
32 base 33 assembling end
331 pivoting ring groove 332 clamping ring groove
34 assembling pipe part 341 screw thread
35 nut inner tube 36 second locking part
361 locking flange 37 channel portion
38 inner shaft hole 40 zero-setting nut
41 screw hole 42 screw strip
43 the void part 44 is pivoted with the hole
45 first engaging portion 46 first positioning flange
47 second positioning flange 50 nut securing plate
51 sheet body 52 pivot column
53 raised strip 54 locating flange
60 screw 61 screw body
62 plug connecting end 63 screwing unit
64 ring groove 65 spiral groove
66 stop 70 push rod
71 push rod middle hole 72 screw joint part
73 graduation 74 pushing arm
75 fluted disc fixed joint 76 guide rail part
80 bottom toothed disc 81 second meshing portion
82 to the aperture.
Detailed Description
The technical means adopted by the invention to achieve the preset purpose are further described below by combining the accompanying drawings and the preferred embodiments of the invention.
Referring to fig. 1, a preferred embodiment of the syringe with injection dosage adjustment function of the present invention is disclosed, as shown in fig. 12 and 19, the syringe 1 is used to assemble a medicine bottle 2, the medicine bottle 2 contains medicine liquid and a rubber plug 2B in a bottle body 2A, a needle and a needle sheath sleeved outside the needle are installed at the front end of the bottle body 2A, and the syringe 1 includes a medicine bottle connecting device 3 and an adjustable pushing device 4.
As shown in fig. 2 to 6, the medicine bottle connecting device 3 is used for assembling the medicine bottle 2, and the medicine bottle connecting device 3 comprises a housing 10, a rotating button 20 and a zero-nut base 30, or further comprises a zero-nut 40 and a nut fixing piece 50.
As shown in fig. 2 to 6, the housing 10 includes a housing base 11, a medicine bottle fitting portion 12 and a coupling tube portion 13, the medicine bottle fitting portion 12 and the coupling tube portion 13 are respectively formed at the front end and the rear end of the housing base 11, two opposite sides of the housing base 11 are respectively formed with a wing portion 14 projecting outwardly, the wing portions 14 respectively extend to the medicine bottle fitting portion 12, the housing 10 has a housing central hole 15 therein, the housing central hole 15 extends from the front end of the housing base 11 to the rear end of the coupling tube portion 13, the medicine bottle fitting portion 12 has a fitting groove 16 formed therein, the fitting groove 16 communicates with the housing central hole 15, the medicine bottle fitting portion 12 forms communicating front and side openings at the front end and the side edges of the fitting groove 16, so that the medicine bottle 2 can be laterally assembled in the fitting groove 16 through the side opening and the front opening of the medicine bottle fitting portion 12, the body 2A of the medicine bottle 2 can be fixed in the medicine bottle fitting portion 12, the rear end of the body 2A of the medicine bottle 2 corresponds to the housing center hole 15.
As shown in fig. 2 to 6, in the housing 10, two one-way snaps 17 are formed on the outside of the coupling tube 13 on the back surface of the housing base 11 to provide positioning and generate sound. In the preferred embodiment shown in fig. 2 to 6, the connecting tube 13 of the housing 10 has two recesses 131, the recesses 131 extend forward from the rear end of the connecting tube 13, so that the connecting tube 13 has the elasticity of retraction and recovery, and a limiting flange 132 is formed on the outer peripheral surface of the rear end of the connecting tube 13.
As shown in fig. 2 to 6, the housing 10 may further include an indication mark 18 disposed on an outer peripheral surface of the housing base 11, the indication mark 18 corresponds to a center line of the housing 10, and the indication mark 18 provides an auxiliary mark for adjusting alignment.
As shown in fig. 2 to 6, the knob 20 is rotatably assembled outside the connecting tube 13 of the housing 10, the knob 20 is located at the rear side of the housing base 11, wherein the connecting tube 13 of the housing has the elasticity of retraction and return, so that the knob 20 is easily assembled on the connecting tube 13, and the knob 20 is prevented from being separated from the connecting tube 13 by the limit of the limiting flange 132 at the rear end of the connecting tube 13 on the knob 20.
As shown in fig. 2 to 6, the knob 20 includes a knob housing 21, a knob inner plate 22, a knob inner tube 23 and an inner hole 24, the knob housing 21 is a hollow housing, the knob housing 21 has a housing front section 211 and a housing rear section 212, the knob inner plate 22 is formed inside the knob housing 21 and located between the housing front section 211 and the housing rear section 212, the knob inner tube 23 is located inside the housing front section 211, and two one-way fastening grooves 213 are formed on the inner peripheral wall of the housing front section 211.
As shown in fig. 2 to 6, the inner knob tube 23 is connected to the front end of the inner knob tube 22, the inner hole 24 is formed in the inner knob tube 23 and the inner knob tube 22, that is, the inner hole 24 extends rearward from the front end of the inner knob tube 23 and penetrates through the inner knob tube 22, the knob 20 forms a ring stop portion 241 on the inner peripheral wall of the inner hole 24, the coupling tube 13 of the housing 10 is pivotally arranged in the inner hole 24 of the knob 20 by the ring stop portion, and the knob 20 is prevented from being detached from the coupling tube 13 by the limit of the limit flange 132 at the rear end of the coupling tube 13 and the ring stop portion 241. The rear end surface of the inner turn button plate 22 forms a first locking portion 25, the first locking portion 25 has a plurality of locking flanges 251, the locking flanges 251 are arranged in a ring shape relative to the center of the inner hole 24, and the turn button housing 21 forms a snap-in portion 26 on the inner peripheral wall of the housing rear section 212. The knob 20 may further include a mark line 27 on the outer peripheral surface of the knob housing 21, and the mark line 27 is matched with the indication mark 18 of the housing 10 to indicate whether the alignment is correct.
As shown in fig. 2 to 6, the zero-returning nut base 30 is connected to the rear section 212 of the housing of the rotary knob 20, and the zero-returning nut base 30 can rotate and be clamped with respect to the rotary knob 20, the zero-returning nut base 30 includes a base portion 32, an assembling end portion 33, an assembling pipe portion 34, and a nut inner pipe portion 35, the assembling end portion 33 and the assembling pipe portion 34 are respectively formed at the front end and the rear end of the base portion 32, a pivot ring groove 331 and a clamping ring groove 332 are formed on the outer peripheral surface of the assembling end portion 33 at a front-rear interval, a screw thread 341 is formed on the outer peripheral surface of the assembling pipe portion 34, the nut inner pipe portion 35 is disposed in the assembling end portion 33, and the nut inner pipe portion 35 extends forward from the base portion 32, an inner shaft hole is formed in the zero-returning nut base 30, the inner shaft hole 38 extends from the front end of the nut portion to the rear end of the assembling pipe portion 34, at least one guide groove 37 extending axially forward and rearward is formed in the inner shaft, the front end of the nut inner tube 35 forms a second locking part 36, the second locking part 36 has a plurality of locking concave edges 361, the assembling end part 33 of the zeroing nut base 30 can be assembled in the shell rear section 212 of the turn knob 20, the clamping part 26 of the turn knob 20 can be selectively clamped in any one of the pivoting ring groove 331 and the clamping ring groove 332, wherein, when the clamping part 26 is clamped in the pivoting ring groove 331 positioned in the front, the zeroing nut base 30 can rotate relative to the turn knob 20; when the engaging portion 26 is engaged with the engaging ring groove 332 located at the rear, the second locking portion 36 at the front end of the nut inner tube portion 35 of the return-to-zero nut base 30 is engaged with the first locking portion 25 at the rear end surface of the knob inner plate 22 of the knob 20 in a concave-convex manner to be in a locked state. The outer periphery of the zero-returning nut base 30 may further be provided with a rotation direction indicating mark 31 for indicating the rotation direction.
As shown in fig. 2 to 6, a screw hole 41 is formed in the zero-returning nut 40, a screw strip 42 is formed on the wall of the screw hole 41 of the zero-returning nut 40, a gap 43 is formed in the screw strip 42, a pivot hole 44 is formed on the peripheral wall of the zero-returning nut 40, the position of the pivot hole 44 is correspondingly connected with the gap 43, a first engaging portion 45 is formed at the rear end of the zero-returning nut 40, and the first engaging portion 45 has a plurality of first engaging teeth with a single oblique direction. The return-to-zero nut 40 is screwed on the outside of the assembly pipe portion 34 of the return-to-zero nut base 30, and the screw strip 42 is screwed with the screw thread 341.
As shown in fig. 2 to 9, the nut fixing piece 50 includes a sheet body 51, a pivot column 52 and a raised strip 53, the pivot column 52 is disposed on one end side of the sheet body 51, the raised strip 53 is disposed on the other end of the pivot column opposite to the sheet body, the nut fixing piece 50 is pivoted in the pivot hole 44 of the zero-returning nut 40 by the pivot column 52, the sheet body 51 is disposed on the outer side of the zero-returning nut 40, the raised strip 53 is disposed on the gap 43 of the thread strip 42 of the zero-returning nut 40, the nut fixing piece 50 can rotate relative to the zero-returning nut 40 to make the raised strip 53 and the thread strip 42 form a continuous spiral strip, and can be screwed with the thread 341 of the zero-returning nut base 30, or the raised strip 53 can deflect at the gap 43 of the thread strip 42 to interfere with the thread 341 of the zero-returning nut base 30.
As shown in fig. 2 to 6, the outer peripheral surface of the zero-returning nut 40 is provided with a first positioning concave edge 46 and a second positioning concave edge 47 at two different sides of the pivot hole 44, the side of the sheet body 51 of the nut fixing plate 50 facing the zero-returning nut 40 is provided with a positioning flange 54, and the positioning flange 54 can be selectively clamped on the first positioning concave edge 46 and the second positioning concave edge 47 along with the rotation of the nut fixing plate 50.
As shown in fig. 10 to 12, the adjustable pushing rod device 4 is inserted into the vial connecting device 3 and can extend into the vial 2 to push the plug 2B, and the adjustable pushing device 4 includes a screw 60 and a pushing rod 70, or further includes a bottom toothed disc 80.
As shown in fig. 10 to 12, the screw 60 includes a screw body 61 and a rubber plug connecting end 62, a plurality of screwing units 63 are formed on the outer peripheral surface of the screw body 61, the screwing units 63 are arranged in sequence along the axial direction of the screw body 61 at equal intervals, an annular groove 64 is formed between every two adjacent screwing units 63, one or more spiral grooves 65 are formed in each screwing unit 63, and the front and rear ends of the spiral groove 65 of each screwing unit 63 are respectively connected with the annular groove 64 at the front and rear positions. The plug connecting end portion 62 is formed at the front end of the screw body 61, the plug connecting end portion 62 is used for connecting a plug 2B in the medicine bottle 2, and the screw 60 further has a blocking portion 66 between the plug connecting end portion 62 and the screw body 61.
As shown in fig. 10 to 12, a push rod central hole 71 is formed in the push rod 70, a screw thread portion 72 is formed on the push rod 70 at the hole wall of the push rod central hole 71, the screw rod 60 is assembled in the push rod central hole 71 of the push rod 70, and the screw thread portion 72 of the push rod 70 is in screw thread fit with the screw groove 65 of the screw rod 60, so that the screw rod 60 can rotate and move back and forth in the push rod 70, and the stopper 66 of the screw rod 60 can be positioned at the front end of the push rod 70 for limitation. The screw-connecting portion 72 is disposed on the front-section hole wall of the push-rod central hole 71, the push rod 70 further forms at least one pushing arm 74, in the preferred embodiment, the push rod 70 has two pushing arms 74, the two pushing arms 74 are arranged oppositely along the radial direction, the front end of the pushing arm 74 is a free end, so that the pushing arm 74 can be bent and deformed, the pushing arm 74 can extend into the push-rod central hole 71, and the pushing arm 74 can extend into the annular groove 64 of the screw rod 60 and push against the end surface of the screw-connecting unit 63.
As shown in fig. 22, the outer peripheral surface of the push rod 70 is formed with a scale 73, the push rod 70 is assembled in the return-to-zero nut base 30, the push rod 70 can move linearly with respect to the return-to-zero nut base 30, and the push rod 70 can rotate together with the return-to-zero nut base 30. In the preferred embodiment, the outer periphery of the push rod 70 forms a guide rail 76 extending axially forward and backward, and the guide rail 76 is correspondingly engaged with the guide groove 37 of the return-to-zero nut base 30, so that the push rod 70 can move linearly relative to the return-to-zero nut base 30, and the push rod 70 can rotate together with the return-to-zero nut base 30.
As shown in fig. 10 to 12, the rear end of the push rod 70 further has a gear plate fixing portion 75, the bottom gear plate 80 has a fixing hole 82 therein, the gear plate fixing portion 75 of the push rod 70 is fixedly connected to the fixing hole 82 of the bottom gear plate 80, a second engaging portion 81 is formed on the front end surface of the bottom gear plate 80, the second engaging portion 81 has a plurality of second engaging teeth with a single oblique direction, and the second engaging portion 81 can be selectively engaged with the first engaging portion 45 at the rear end of the return-to-zero nut 40.
When the syringe is used, in an initial state as shown in fig. 1, the vial connecting device 3 and the adjustable pushing device 4 are separated from each other, and the operation steps are as follows:
as shown in fig. 12, the step of assembling the syringe 1 to the medicine bottle 2 includes installing the medicine bottle 2 in the medicine bottle connecting device 3, wherein the medicine bottle 2 with the needle sheath is installed in the medicine bottle assembling portion 12 of the housing 10 in a side-inserting manner for positioning, the opening of the rear end of the body 2A of the medicine bottle 2 corresponds to the housing central hole 15 of the housing base 11, and then the adjustable pushing device 4 is inserted into the medicine bottle 2 through the medicine bottle connecting device 3, at this time, the zeroing nut 40 can rotate relative to the rotating button 20, the zeroing nut 40 is located in front of the bottom toothed disc 80 of the adjustable pushing device 4, and the zeroing nut 40 and the bottom toothed disc 80 are not engaged with each other.
As shown in fig. 14 to 16, the syringe 1 is zeroed, wherein the push rod 70 of the adjustable pushing device 4 is rotated to drive the screw rod 60 screwed in the push rod 70 to move forward by the rotation force of the push rod 70 until the plug connecting end 62 at the front end of the screw rod 60 abuts against the plug 2B in the medicine bottle. The return-to-zero nut base 30 is pressed forward into the rotary knob 20, so that the engaging portion 26 of the rotary knob 20 is engaged with the engaging ring groove 332 at the rear of the return-to-zero nut base 30, and the second locking portion 36 at the front end of the nut inner tube portion 35 of the return-to-zero nut base 30 is engaged with the first locking portion 25 at the rear end surface of the rotary knob inner plate 22 of the rotary knob 20 in a concave-convex manner to be in a locked state. Then, the return-to-zero nut 40 is rotated along the needle to contact the bottom fluted disc 80 at the rear end of the push rod 70, the first engaging portion 45 at the rear end of the return-to-zero nut 40 is engaged with the second engaging portion 81 at the front end face of the bottom fluted disc 80, as shown in fig. 8 and 9, the rotating nut fixing piece 50 is rotated to turn, so that the return-to-zero nut 40 is fixed on the return-to-zero nut base 30, the return-to-zero nut 40 is fixed and cannot move, and the return-to-zero step is completed.
In the zeroing step of the syringe 1 after the vial 2 is assembled, as shown in fig. 17 to 18 and 8 to 9, the raised portions 53 of the nut fixing pieces 50 are deflected at the positions of the vacant portions 43 of the thread strips 42 of the zeroing nut 40 by rotating the nut fixing pieces 50 in the direction of rotation, the thread threads 341 of the zeroing nut base 30 are interfered with each other, the zeroing nut 40 is fixed to the zeroing nut base 30, the zeroing nut 40 is fixed so as not to be movable, and the positioning flange 54 of the sheet body 51 of the nut fixing pieces 50 facing the side surface of the zeroing nut 40 is engaged with the second positioning recessed edge 47, thereby achieving a stable locked state.
Referring to fig. 21 to 23, the injection dose of the injector 1 is adjusted by rotating (counterclockwise) the knob 20 by a fixed angle (in the preferred embodiment, 1 unit is set as 0.1ml injection dose) until the desired scale is reached.
In the step of adjusting the injection dosage of the injector 1, as shown in fig. 5 and fig. 6, the injector 1 limits the rotation of the knob 20 to a fixed scale and cannot be rotated reversely any more through the combination structure of the two unidirectional snap fasteners 17 at the rear end of the housing 10 and the two unidirectional snap grooves 213 at the inner peripheral wall of the front housing section 211 of the knob 20, and the knob 20 has a distinct positioning sound at each fixed angle, so that the user can use the sound as the identification function of adjusting the injection dosage.
As shown in fig. 23, in the step of performing injection, after the user adjusts the required scale 73 for the injection dose, the user can start to press the push rod 70 to move forward, and push the rubber plug 2B in the medicine bottle 2 through the screw 60 to push the medicine liquid in the medicine bottle 2 to be output until the bottom toothed disc 80 at the rear end of the push rod 70 contacts the zero returning nut 40, thereby completing the injection.
Through the above description, the injector of the present invention mainly utilizes the combination structure of the medicine bottle connecting device and the adjustable propelling device, after the medicine bottle connecting device is connected with the medicine bottle, the medicine bottle connecting device is installed on the adjustable propelling device, i.e. the push rod of the adjustable propelling device is driven to move backwards to the preset scale by the rotating button of the medicine bottle connecting device, during the injection, the push rod is pressed, so that the medicine bottle outputs the liquid medicine with the preset dosage, and the injector of the present invention can adjust the injection dosage according to the requirements of different injection objects.
In addition, the injector can also utilize the push rod of the rotary adjustable propelling device to drive the screw rod screwed in the push rod to spirally move forwards by the rotating force of the push rod until the connecting end part of the rubber plug at the front end of the screw rod is abutted against the rubber plug in the medicine bottle, and then the zeroing nut base is pressed forwards into the rotating button to be in a locking state. Then, the return-to-zero nut is rotated along the needle until the return-to-zero nut is contacted with the bottom toothed disc at the rear end of the push rod to be meshed relatively, and then the fixing piece of the rotary nut is rotated to rotate, so that the return-to-zero nut is fixed on the return-to-zero nut base to complete the return-to-zero, and the injector has the initial return-to-zero function during injection dosage adjustment, thereby ensuring that the injection dosage is adjusted more accurately.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An injector with injection dosage adjusting function is characterized by comprising a medicine bottle connecting device and an adjustable propelling device;
this medicine bottle connecting device includes:
a housing, which comprises a housing base, a medicine bottle assembly part and a combination tube part, wherein the medicine bottle assembly part and the combination tube part are respectively formed at the front end and the rear end of the housing base, a housing central hole which is through from front to back is formed in the housing, an assembly groove is formed in the medicine bottle assembly part, and the assembly groove is communicated with the housing central hole and is in a side opening shape;
the knob comprises a knob shell, a knob inner plate, a knob inner tube and an inner hole, wherein the knob inner plate is formed inside the knob shell, the knob inner tube is positioned inside the knob shell, the knob inner tube is connected with the front end of the knob inner plate, and the inner hole is formed in the knob inner tube and the knob inner plate; and
the return-to-zero nut base is connected with the rear section of the shell of the rotating button and comprises a base part, an assembling end part, a group of connecting pipe parts and a nut inner pipe part, wherein the assembling end part and the assembling pipe part are respectively formed at the front end and the rear end of the base part, and an inner shaft hole is formed in the return-to-zero nut base;
the adjustable propulsion device can be arranged in the medicine bottle connecting device, and comprises:
the screw comprises a screw body and a rubber plug connecting end part formed at the front end of the screw body, wherein a plurality of bolt connection units are formed on the outer peripheral surface of the screw body and are arranged in sequence at equal intervals along the axial direction of the screw body, an annular groove is formed between every two adjacent bolt connection units, a spiral groove is formed in each bolt connection unit, and the front end and the rear end of the spiral groove of each bolt connection unit are respectively connected with the annular grooves at the front position and the rear position; and
the push rod group is arranged in the zero-returning nut base, the push rod can move linearly relative to the zero-returning nut base, the push rod can rotate together with the zero-returning nut base, a push rod middle hole is formed in the push rod, scales are formed on the outer peripheral surface of the push rod, a screwed part is formed on the push rod on the hole wall of the push rod middle hole, the screw rod is assembled in the push rod middle hole of the push rod, the screwed part of the push rod is in screwed connection with the spiral groove of the screw rod, the screw rod can rotate and move front and back in the push rod, the push rod is provided with a pushing arm, the front end of the pushing arm is a free end, and the pushing arm can extend into the annular groove of the screw rod and push against the end face of the screwed unit.
2. The injector with injection dose adjusting function according to claim 1, wherein the housing is formed with two one-way snaps on a back surface of the base of the housing opposite to an outer side of the connecting tube, the button is formed with two one-way snap grooves on an inner peripheral wall of a front section of the button housing, and the two one-way snaps can be respectively snapped into the two one-way snap grooves.
3. The syringe of claim 1, wherein the inner axial hole of the zeroing nut base has a front and a rear axially extending guiding groove, the plunger has a front and a rear axially extending guiding groove on its outer circumference, and the guiding groove is correspondingly engaged with the guiding groove of the zeroing nut base, so that the plunger can move linearly relative to the zeroing nut base and rotate together with the zeroing nut base.
4. The syringe with injection dose adjusting function according to claim 3, wherein the screw has a stopper between the connecting end of the rubber plug and the screw body, and the stopper of the screw is capable of being positioned at the front end of the push rod for limiting.
5. The syringe of claim 2, wherein the inner axial hole of the zeroing nut base has a front and a rear axially extending guiding groove, and the outer circumference of the plunger has a front and a rear axially extending guiding groove, the guiding groove is correspondingly engaged with the guiding groove of the zeroing nut base, so that the plunger can move linearly relative to the zeroing nut base and rotate together with the zeroing nut base.
6. The syringe with injection dose adjusting function according to any one of claims 1 to 5, wherein the knob is provided with a snap-in part on the inner peripheral wall of the knob housing with respect to the rear of the knob inner plate;
the assembly pipe part of the return-to-zero nut base is respectively formed at the front end and the rear end of the base part, the outer peripheral surface of the assembly end part forms a pivot ring groove and a clamping ring groove which are arranged at intervals front and back, the outer peripheral surface of the assembly pipe part forms a screw thread, the nut inner pipe part is arranged in the assembly end part, the nut inner pipe part extends forwards from the base part, the front end of the nut inner pipe part forms a second locking part, the second locking part is provided with a plurality of locking concave edges, the assembly end part of the return-to-zero nut base can be assembled in the rear section of the shell of the turn button, the clamping part of the turn button can be selectively clamped in any one of the pivot ring groove and the clamping ring groove, and the second locking part at the front end of the nut inner pipe part of the return-to-zero nut base can be locked by concave-convex matching with the first locking part at;
this medicine bottle connecting device still includes a zero-reset nut and a nut stationary blade, wherein:
the zeroing nut is internally provided with a screwed hole, the zeroing nut forms a screwed strip on the hole wall of the screwed hole, a vacant part is formed in the screwed strip, the peripheral wall of the zeroing nut forms a pivoting hole, the pivoting hole is correspondingly connected with the vacant part, the rear end of the zeroing nut forms a first meshing part, the zeroing nut is screwed outside the assembling pipe part of the zeroing nut base, and the screwed strip is in screwed fit with the screwed thread;
the nut fixing piece comprises a piece body, a pivot column and a convex strip part, wherein the pivot column is arranged on one end side face of the piece body, the convex strip part is positioned at the other end of the pivot column relative to the piece body, the nut fixing piece is pivoted in a pivot hole of the zero returning nut through the pivot column, the piece body is positioned on the outer side face of the zero returning nut, the convex strip part is positioned at a vacant part of a screw strip of the zero returning nut, and the nut fixing piece can rotate relative to the zero returning nut so that the convex strip part can change positions at the vacant part of the screw strip;
the adjustable propelling device is provided with a bottom fluted disc at the rear end of the push rod, the front end surface of the bottom fluted disc forms a second meshing part, and the second meshing part can be selectively meshed with the first meshing part at the rear end of the return-to-zero nut relatively.
7. The syringe of claim 6, wherein the outer periphery of the zeroing nut has a first positioning concave edge and a second positioning concave edge on two opposite sides of the pivot hole, and the sheet of the nut retaining plate has a positioning flange facing the side of the zeroing nut, the positioning flange being selectively engaged with the first positioning concave edge and the second positioning concave edge along with the rotation of the nut retaining plate.
8. The injector of claim 6, wherein the housing has an indication mark on the outer periphery of the base of the housing, and the knob has a marking line on the outer periphery of the knob housing, the marking line being capable of engaging with the indication mark of the housing.
9. The syringe of claim 6 wherein the zero nut base has a rotation direction indicating mark on its outer periphery to indicate the direction of rotation.
10. The syringe of claim 6, wherein the housing has an indication mark on the outer peripheral surface of the base portion of the housing, and the knob has a marking line on the outer peripheral surface of the knob housing, the marking line being capable of engaging with the indication mark of the housing; the outer peripheral surface of the zero-returning nut base is provided with a rotation direction indicating mark for indicating the rotation direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811240033.8A CN111084918A (en) | 2018-10-24 | 2018-10-24 | Syringe with injection dosage adjusting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811240033.8A CN111084918A (en) | 2018-10-24 | 2018-10-24 | Syringe with injection dosage adjusting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111084918A true CN111084918A (en) | 2020-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811240033.8A Pending CN111084918A (en) | 2018-10-24 | 2018-10-24 | Syringe with injection dosage adjusting function |
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| Country | Link |
|---|---|
| CN (1) | CN111084918A (en) |
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Application publication date: 20200501 |