TWI670097B - Syringe with injection dose adjustment - Google Patents

Abstract

A syringe with an injection dose adjustment function, comprising a vial connecting device and an adjustable propulsion device, wherein a vial is connected by a vial connecting device, and then an adjustable propulsion device is installed in the vial connecting device and Extending into the vial, the button of the vial connecting device can drive the push rod of the adjustable propulsion device to move backward to a predetermined scale. When the injection is pressed, the push bottle can output a predetermined dose of the liquid medicine, so that the medicine bottle can output a predetermined dose of the liquid medicine. The syringe of the present invention is capable of adjusting the injected dose depending on the needs of different injection subjects.

Description

Syringe with injection dose adjustment

The present invention relates to a syringe, and more particularly to a syringe which can be combined with a vial containing a drug solution and which has an injection dose adjustment function.

Based on the safety regulations for pharmaceutical injection, existing syringes already have a metered injection function. That is, the metering type injection pen is used to assemble the medicine bottle, and uses the push rod action of pressing the rear end of the syringe to push the piston in the medicine bottle to move a certain stroke distance through the interlocking control of the internal driving mechanism, and then output a predetermined dose of the medicine through the needle. liquid.

However, the aforementioned metered syringes can provide the function of outputting a fixed dose of the drug solution. However, during the use of the syringe, it is usually necessary to adjust the dose according to the needs of different injection targets. Existing metering syringes are difficult to meet the needs of different users due to the lack of adjustment of the injection dose.

It is an object of the present invention to provide a syringe having an injection dose adjustment function, which solves the problem that the prior syringe cannot adjust the injection dose according to the needs of different injection targets.

In order to achieve the foregoing object, the syringe with the injection dose adjustment function provided by the present invention comprises a vial connecting device and an adjustable propulsion device; wherein: the vial connecting device comprises: An outer casing comprising a casing base, a vial assembly portion and a combined pipe portion, wherein the vial assembly portion and the coupling pipe portion are respectively formed at a front end and a rear end of the outer casing base, and the outer casing has a front and rear through a hole in the outer casing, a fitting groove is formed in the bottle fitting portion, the fitting groove communicates with the hole in the outer casing and has a lateral opening shape; and a rotary knob is unidirectionally arranged on the outer side of the combined pipe portion of the outer casing The button includes a button housing, a button inner plate, a button inner tube and an inner hole, the button inner plate is formed inside the button housing, and the button inner tube is located at the rotation Inside the button housing, the inner tube of the button is connected to the front end of the inner panel of the button, the inner hole is disposed in the inner tube of the rotation button and the inner panel of the button; and a zero return nut base is connected to the rotation In the rear part of the casing of the button, the zero return nut base comprises a base base portion, a set of joint end portions, a set of joint portions and a nut inner tube portion, and the assembly end portion and the group joint tube portion are respectively formed on the base portion of the base An inner shaft hole is formed in the base of the zero return nut at the front end and the rear end; the adjustable pusher is mounted The adjustable propulsion device comprises: a screw comprising a screw body and a rubber plug connecting end formed at a front end of the screw body, the screw body forming a plurality of outer peripheral surfaces a screwing unit, wherein the plurality of screwing units are sequentially arranged at equal intervals along the axial direction of the screw body, and each two adjacent screwing units have a ring groove therebetween, and each of the screwing units forms a spiral groove. The front and rear ends of the spiral groove of each screwing unit are respectively connected to the annular groove at the front and rear positions; and a push rod is disposed in the zero return nut base, and the push rod can be relative to the return The zero nut base moves linearly, and the push rod can rotate together with the zero return nut base, wherein a push rod middle hole is formed in the push rod, and the outer peripheral surface of the push rod is formed with a scale, and the push rod is in the middle hole of the push rod a hole is formed in the hole wall, the screw is assembled in the hole of the push rod of the push rod, the screw portion of the push rod is screwed with the screw groove of the screw, and the screw can rotate in the push rod Moving forward and backward, the push rod has a pushing arm, and the front end of the pushing arm is free And the pushing arm can be inserted into the ring groove of the screw and the end surface abutting against the screwing unit.

In the syringe having the injection dose adjustment function as described above, the outer casing forms two unidirectional snaps on the back side of the base of the outer casing with respect to the outer side of the joint tube portion, and the rotary knob forms two unidirectional directions on the inner peripheral wall of the front section of the rotary knob housing. The two-way snap fasteners can be respectively buckled into the two one-way buckle slots.

In the syringe having the injection dose adjustment function as described above, the inner shaft hole wall of the zero return nut base forms a front and rear axially extending guide groove portion, and the push rod outer peripheral surface forms a front and rear axially extending guide rail portion, the guide rail The portion cooperates with the guide groove portion of the zero return nut base to linearly move the push rod relative to the zero return nut base, and the push rod can rotate together with the zero return nut base.

In the syringe having the injection dose adjusting function as described above, the screw further has a stopper between the rubber plug connecting end portion and the screw body, and the screw portion of the screw can be positioned at the front end of the push rod.

In the syringe having the injection dose adjustment function as described above, the inner shaft hole wall of the zero return nut base forms a front and rear axially extending guide groove portion, and the push rod outer peripheral surface forms a front and rear axially extending guide rail portion, the guide rail The portion cooperates with the guide groove portion of the zero return nut base to linearly move the push rod relative to the zero return nut base, and the push rod can rotate together with the zero return nut base.

In the syringe having the injection dose adjustment function as described above, the rotary knob is provided with a catching portion on the inner peripheral wall of the rotary knob housing with respect to the rear of the rotary button inner panel; the outer end of the assembled end portion of the zero return nut base Forming a pivot ring groove and a snap ring groove arranged in a front-rear direction, the outer peripheral surface of the set of pipe portions forming a screw thread, the inner pipe portion of the nut is disposed in the assembled end portion, and the inner tube portion of the nut Extending from the base of the base, the front end of the inner tube portion of the nut forms a second locking portion, and the second locking portion has a plurality of locking concave edges, and the assembled end portion of the zero return nut base can be assembled on the In the rear section of the casing of the rotary button, the engaging portion of the rotating button can be selectively engaged with any one of the pivoting ring groove and the snap ring groove, and the front end of the nut inner tube portion of the zeroing nut base The second locking portion can be locked and engaged with the first locking portion of the rear end surface of the rotary button inner panel of the rotary button; the vial connecting device further includes a return-to-zero nut and a nut fixing piece, wherein: A screwing hole is formed in the zeroing nut, and the zeroing nut forms a screwing strip on the hole wall of the screwing hole, and a hollow portion is formed in the screwing strip, and a peripheral wall of the zeroing nut forms a a pivoting hole, the pivoting hole is correspondingly connected to the hollow portion, and a rear end of the zeroing nut forms a first engaging portion, and the returning nut is screwed on the outside of the grouping portion of the zeroing nut base The threaded rod is screwed into the threaded thread; the nut fixing piece comprises a piece body, a pivot column and a ridge portion, the pivot column is disposed on one side of the sheet body, and the rib portion is located at the pivot The nut fixing piece is pivotally disposed in a pivot hole of the zero return nut, and the piece is located on an outer side surface of the zero return nut, and the ridge portion is located at the other end of the sheet body a missing portion of the screwing rod of the zero nut, the nut fixing piece being rotatable relative to the returning nut, so that the protruding portion can change position of the missing portion of the screwing strip; the adjustable propulsion device A bottom toothed disc is disposed at a rear end of the push rod, and a front end surface of the bottom toothed disc forms a second engaging portion, and the second engaging portion can selectively and return to the zero nut Opposite end of the first engagement portion engages.

In the syringe with the injection dose adjustment function as described above, the outer circumferential surface of the zero return nut is provided with a first positioning concave edge and a second positioning concave edge on the opposite sides of the pivot hole, and the nut is fixed. a positioning flange is disposed on a side of the sheet body facing the zero return nut, and the positioning flange is selectively engageable with the first positioning concave edge and the second positioning concave portion along with the rotation of the nut fixing piece edge.

In the syringe having the injection dose adjustment function as described above, the outer peripheral surface of the outer casing base of the outer casing is provided with an indication mark, and the rotary button can be provided with a marking line on the outer circumferential surface of the rotary knob housing, and the marking line can be marked with the outer casing. Cooperation.

In the syringe having the injection dose adjustment function as described above, the outer peripheral surface of the zero return nut base is provided with a direction indicating mark for indicating the direction of rotation.

According to the invention of the syringe with the injection dose adjustment function, the utility model mainly uses the combination structure of the medicine bottle connecting device and the adjustable propulsion device, and the medicine bottle connecting device is assembled into the medicine bottle and then installed in the adjustable propulsion device. That is, the adjustable pusher can be driven by the knob of the vial connecting device The pusher moves backward to a predetermined scale. When the pusher is pressed, even if the vial outputs a predetermined dose of the drug solution, the syringe of the present invention can adjust the injected dose according to the needs of different injection targets.

The syringe of the present invention further utilizes the push rod of the rotary adjustable propulsion device, and the screw spirally disposed in the push rod moves forward by the force of the rotation of the push rod until the rubber plug connection end of the screw front end abuts the medicine bottle As far as the rubber plug is concerned, the zero-nut nut base is pressed forward into the rotary button to be locked. After that, the zero-return nut is screwed to the bottom toothed disc at the rear end of the contact push rod to be relatively engaged, and then the rotating nut fixing piece is turned to make the zero return nut fixed on the zero return nut base, and the zero return is completed. The syringe has the initial zeroing function when the injection dose is adjusted, and the adjustment of the injection dose is more precise.

1‧‧‧Syringe

2‧‧‧Pill bottle

2A‧‧‧ bottle

2B‧‧‧ rubber stopper

3‧‧‧Pill bottle connection device

4‧‧‧Adjustable propulsion unit

10‧‧‧ Shell

11‧‧‧The base of the casing

12‧‧‧Pill Bottle Assembly Department

13‧‧‧Combined pipe department

131‧‧‧ recess

132‧‧‧Limited flange

14‧‧‧Flanking

15‧‧‧Shed hole

16‧‧‧Assemble

17‧‧‧One-way buckle

18‧‧‧Indicator mark

20‧‧‧ Turn button

21‧‧‧ knob housing

211‧‧‧ front section of the casing

212‧‧‧The rear section of the casing

213‧‧‧One-way buckle

22‧‧‧Turner inner panel

23‧‧‧ button inner tube

24‧‧‧ inside hole

241‧‧‧ Ring Block

25‧‧‧First Locking Department

251‧‧‧Locking flange

26‧‧‧Cards

27‧‧‧ mark line

30‧‧‧zero nut base

31‧‧‧Rotary Direction Mark

32‧‧‧ base of base

33‧‧‧Group end

331‧‧‧ pivot ring groove

332‧‧‧ card ring slot

34‧‧‧Group of Takeovers

341‧‧‧Spiral thread

35‧‧‧ Nut inner tube

36‧‧‧Second Locking Department

361‧‧‧Locking flange

37‧‧‧ Guide groove

38‧‧‧Inner shaft hole

40‧‧‧zero nut

41‧‧‧Spiral hole

42‧‧‧Splicing strip

43‧‧‧ Shortage Department

44‧‧‧Pivot hole

45‧‧‧First meshing

46‧‧‧First positioning concave edge

47‧‧‧Second positioning recess

50‧‧‧ Nut Holder

51‧‧‧ tablets

52‧‧‧ pivot

53‧‧‧Bars

54‧‧‧ positioning flange

60‧‧‧ screw

61‧‧‧ screw body

62‧‧ ‧ rubber plug connection end

63‧‧‧ screw unit

64‧‧‧Circle

65‧‧‧Spiral groove

66‧‧ ‧ blocking

70‧‧‧Put

71‧‧‧Push hole

72‧‧‧ screw joint

73‧‧‧ scale

74‧‧‧Pushing arm

75‧‧‧ring plate fixing

76‧‧‧Track Department

80‧‧‧ bottom plate

81‧‧‧Second joint

82‧‧‧Fixed holes

1 is a perspective exploded view of a vial connecting device and an adjustable propulsion device in a preferred embodiment of the syringe of the present invention.

2 is a perspective exploded view of the vial connecting device of FIG. 1.

3 is a perspective exploded perspective view of the vial connecting device of FIG. 1 according to another viewing angle.

4 is a perspective exploded view of the outer casing and the rotary knob in the vial connecting device shown in FIGS. 2 and 3.

FIG. 5 is a schematic cross-sectional view showing the combination of the outer casing, the rotary knob and the zero return nut base in the vial connecting device shown in FIGS. 1 to 3.

Figure 6 is a schematic end cross-sectional view showing the position of the face line A-A shown in Figure 5.

Fig. 7 is a side cross-sectional view showing the rotary knob and the zero return nut base of the vial connecting device shown in Figs. 1 to 3 before being locked.

Fig. 8 is a perspective view showing the zero return nut and the nut fixing piece in the medicine bottle connecting device shown in Figs. 1 to 3 before locking.

FIG. 9 is a perspective view of the zero return nut and the nut fixing piece in the vial connecting device shown in FIG. 1 to FIG.

Figure 10 is a perspective exploded view of the adjustable propulsion device of Figure 1.

Figure 11 is a perspective exploded perspective view of the adjustable propulsion device of Figure 1.

Figure 12 is an exploded perspective view of the vial assembly before the vial attachment device.

Figure 13 is a perspective exploded view of the ready-to-assemble adjustable propulsion device after the vial connecting device is assembled with the vial.

14 to 16 are schematic views showing the operation of resetting the syringe of the present invention.

17 and FIG. 18 are schematic diagrams showing the operation of locking the zero return nut to the zero return nut base by using the nut fixing piece after the zero adjustment of the syringe of the present invention.

Figure 19 is a side elevational cross-sectional view of the syringe-incorporated vial of the present invention after zero adjustment.

Figure 20 is a partially enlarged schematic view of Figure 19.

21 and 22 are schematic views showing the operation of adjusting the injection dose of the syringe of the present invention.

Figure 23 is a schematic cross-sectional view showing the injection dose adjustment of the syringe of the present invention.

As shown in FIG. 1, a preferred embodiment of the syringe having the injection dose adjustment function of the present invention is disclosed. As shown in FIG. 12 and FIG. 19, the syringe 1 is used for assembling a vial 2, and the vial 2 is The bottle body 2A is provided with a chemical liquid and a rubber plug 2B. The front end of the bottle body 2A is provided with a needle and a needle sheath sleeved on the outer side of the needle. The syringe 1 includes a medicine bottle connecting device 3 and an adjustable propulsion device. 4.

As shown in FIG. 2 to FIG. 6 , the vial connecting device 3 is used for assembling the vial 2 , and the vial connecting device 3 includes a casing 10 , a rotary knob 20 and a zero return nut base 30 , or A return to zero nut 40 and a nut retaining tab 50 are further included.

As shown in FIG. 2 to FIG. 6, the outer casing 10 includes a casing base portion 11, a vial assembly portion 12, and a joint pipe portion 13, and the vial assembly portion 12 and the joint pipe portion 13 are respectively formed at the front end of the casing base portion 11. And the rear end, the opposite sides of the outer casing base 11 respectively form an outwardly protruding side wing portion 14, and the two side flap portions 14 respectively extend to the vial assembly portion 12, and the outer casing 10 has a casing inner hole 15 therein. The outer hole 15 of the outer casing extends from the front end of the outer casing base 11 to the rear end of the joint pipe portion 13, and a fitting groove 16 is formed in the vial assembly portion 12. The fitting groove 16 communicates with the inner hole 15 of the outer casing, and the vial assembly portion 12 is assembled. The front end and the side of the groove 16 are formed to communicate with the front opening and the side opening, so that the vial 2 can be laterally assembled into the fitting groove 16 through the side opening and the front opening of the vial fitting portion 12. The bottle body 2A of the vial 2 can It is fixed in the vial assembly portion 12, and the rear port of the bottle body 2A of the vial 2 corresponds to the hole 15 in the outer casing.

As shown in FIG. 2 to FIG. 6, in the outer casing 10, two unidirectional snaps 17 are formed on the outer side of the joint tube portion 13 on the back surface of the outer casing base portion 11 for providing positioning and sound generation. In the preferred embodiment shown in FIG. 2 to FIG. 6, the joint pipe portion 13 of the outer casing 10 has two recesses 131 extending forward from the rear end of the joint pipe portion 13, so that the joint pipe portion 13 is provided. The elasticity of the contraction and the return, the outer peripheral surface of the rear end of the combined tube portion 13 forms a limit flange 132.

As shown in FIG. 2 to FIG. 6 , the outer casing 10 may further be provided with an indication mark 18 on the outer circumferential surface of the outer casing base 11 . The indicator mark 18 corresponds to the center line of the outer casing 10 and is provided with an auxiliary alignment indicator by the indicator mark 18 . mark.

As shown in FIG. 2 to FIG. 6, the rotary knob 20 is rotatably disposed outside the joint tube portion 13 of the outer casing 10, and the rotary knob 20 is located at the rear side of the outer casing base portion 11, wherein the outer tube is combined with the tube portion. 13 has the elasticity of retraction and recovery, so that the rotary knob 20 is easy to be assembled on the combined tube portion 13, and the limit of the rotary knob 20 at the rear end of the combined tubular portion 13 is used to prevent the rotary knob 20 from being self-retained. The joint pipe portion 13 is detached.

As shown in FIG. 2 to FIG. 6 , the rotary knob 20 includes a rotary knob housing 21 , a rotary inner panel 22 , a rotary inner tube 23 , and an inner hole 24 . The rotary knob housing 21 is hollow. a housing, the knob housing 21 has a housing front section 211 and a housing rear section 212, and the knob inner panel 22 is formed inside the knob housing 21 The inner tube 23 is located between the front portion 211 of the housing and the rear portion 212 of the housing. The inner tube 23 of the housing is located inside the front portion 211 of the housing.

As shown in FIG. 2 to FIG. 6 , the inner tube 23 of the button is connected to the front end of the inner panel 22 of the knob, and the inner hole 24 is disposed in the inner tube 23 of the rotation button and the inner panel 22 of the button, that is, the inner hole 24 . The front end of the rotation button inner tube 23 extends rearward and penetrates through the inner button plate 22, and the rotary knob 20 forms a ring stop portion 241 on the inner peripheral wall of the inner hole 24, and the joint portion 13 of the outer casing 10 is formed by the ring stop portion. The switch is pivotally disposed in the inner hole 24 of the rotary knob 20, and the limit of the rotary flange 132 at the rear end of the combined tubular portion 13 and the ring stop portion 241 is used to limit the rotation of the rotary knob 20, thereby preventing the rotary knob 20 from self-bonding. The tube portion 13 is detached. The rear end surface of the knob inner panel 22 forms a first locking portion 25 having a plurality of locking flanges 251, and the plurality of the locking flanges 251 are annularly arranged with respect to the center of the inner hole 24. The knob housing 21 forms a latching portion 26 on the inner peripheral wall of the rear portion 212 of the housing. The rotary knob 20 can also be provided with a marking line 27 on the outer circumferential surface of the rotary knob housing 21, and by the cooperation of the marking line 27 with the indicator mark 18 of the outer casing 10, it is displayed whether it is correctly aligned.

As shown in FIG. 2 to FIG. 6 , the zero return nut base 30 is coupled to the housing rear section 212 of the rotary knob 20 , and the zero return nut base 30 is rotatable and snap-fitted relative to the rotary knob 20 . The nut base 30 includes a base base 32, a set of end portions 33, a set of joint portions 34, and a nut inner tube portion 35. The assembly end portion 33 and the assembly tube portion 34 are respectively formed at the front end of the base base portion 32. And a rear end, the outer peripheral surface of the connecting end portion 33 is formed with a pivot ring groove 331 and a snap ring groove 332 which are arranged at intervals. The outer peripheral surface of the set of connecting pipe portions 34 forms a screw thread 341, and the inner tube portion of the nut portion 35 is disposed in the assembly end portion 33, and the nut inner tube portion 35 extends forward from the base base portion 32. An inner shaft hole is formed in the zero return nut base 30, and the inner shaft hole 38 is formed from the inner tube of the screw tube. The front end of the portion extends to the rear end of the group connecting portion 34. The inner wall hole 38 of the zero return nut base 30 defines at least one guide groove portion 37 extending axially forward and backward, and the front end of the nut inner tube portion 35 forms a second portion. a locking portion 36 having a plurality of locking recesses 361, the assembled end portions 33 of the zero return nut base 30 being assembled behind the housing of the rotary knob 20 212, the clip portion 20 of the rotation knob 26 is selectively snap ring groove 331 on the pivot snap ring groove 332 with either of which the one, wherein when the engagement portion 26 is provided at a position in the card In the front pivot ring groove 331, the zero return nut base 30 can rotate relative to the rotary knob 20; when the snap portion 26 is engaged with the rearward snap ring groove 332, the nut of the zero return nut base 30 The second locking portion 36 at the front end of the inner tube portion 35 is in a locked state in a concave-convex manner with the first locking portion 25 of the rear end surface of the knob inner panel 22 of the knob 20. The outer peripheral surface of the zero return nut base 30 may also be provided with a direction indicator 31 for indicating the direction of rotation.

As shown in FIG. 2 to FIG. 6 , a screw hole 41 is formed in the return nut 40 , and the return nut 40 forms a screwing strip 42 on the hole wall of the screw hole 41 . A hollow portion 43 is formed. The peripheral wall of the return nut 40 forms a pivot hole 44. The pivot hole 44 is correspondingly connected to the hollow portion 43. The rear end of the zero return nut 40 forms a first engaging portion 45. The first engaging portion 45 has a plurality of first meshing teeth that are inclined in a single direction. The return nut 40 is screwed to the outside of the set pipe portion 34 of the zero return nut base 30, and the screwing bar 42 is screwed into the screw thread 341.

As shown in FIG. 2 to FIG. 9 , the nut fixing piece 50 includes a single body 51 , a pivot post 52 , and a protruding portion 53 . The pivot post 52 is disposed on one end side of the sheet body 51 , and the protruding strip portion 53 is located at the pivot The nut fixing piece 50 is pivoted into the pivot hole 44 of the zero return nut 40 with the pivot post 52 on the outer side of the zero return nut 40, and the convex strip portion 53 is located at the other end of the returning nut 40. The hollow portion 43 of the screwing strip 42 of the zeroing nut 40, the nut fixing piece 50 is rotatable relative to the zero return nut 40, so that the ridge portion 53 and the screwing strip 42 form a continuous spiral strip, and The screw thread 341 of the zero return nut base 30 is screwed, or the rib portion 53 can be deflected at the position of the hollow portion 43 of the screw strip 42 to generate the screw thread 341 of the zero return nut base 30. put one's oar in.

As shown in FIG. 2 to FIG. 6 , the outer circumferential surface of the zero-returning nut 40 is provided with a first positioning concave edge 46 and a second positioning concave edge 47 on opposite sides of the pivoting hole 44. The nut is fixed. A positioning flange 54 is disposed on the side of the sheet body 51 of the sheet 50 facing the zero return nut 40. The positioning flange 54 can be selectively engaged with the first positioning concave edge 46 and the rotation of the nut fixing piece 50. Two positioning recesses 47.

As shown in FIG. 10 to FIG. 12, the adjustable pusher device 4 is disposed in the vial connecting device 3 and can extend into the push bottle 2B in the vial 2, and the adjustable push device 4 includes a screw. 60 and a push rod 70, or further comprising a bottom toothed disc 80.

As shown in FIG. 10 to FIG. 12, the screw 60 includes a screw body 61 and a rubber plug connecting end portion 62. The outer peripheral surface of the screw body 61 forms a plurality of screwing units 63, and the plurality of screwing units 63 are along the line. The axial direction of the screw body 61 is sequentially arranged, and a ring groove 64 is formed between each two adjacent screwing units 63, and one or a plurality of spiral grooves 65 are formed in each screwing unit 63, and each screwing is performed. The front and rear ends of the spiral groove 65 of the unit 63 are connected to the ring grooves 64 at the front and rear positions, respectively. The rubber plug connecting end portion 62 is formed at the front end of the screw body 61. The rubber plug connecting end portion 62 is used for connecting the rubber plug 2B in the medicine bottle 2, and the screw 60 is connected to the rubber plug connecting end portion 62 and the screw body 61. There is also a stop 66 therebetween.

As shown in FIG. 10 to FIG. 12, a pusher hole 71 is formed in the push rod 70, and the push rod 70 is formed with a screwing portion 72 on the hole wall of the pusher hole 71, and the screw 60 is assembled to the push rod. In the middle hole 71 of the push rod 70, the screwing portion 72 of the push rod 70 is screw-fitted with the spiral groove 65 of the screw 60, so that the screw 60 can rotate and move back and forth in the push rod 70. The screw 60 The blocking portion 66 can be located at the front end of the push rod 70. The screwing portion 72 is disposed on the front wall of the hole 71 of the push rod, and the push rod 70 further defines at least one pushing arm 74. In the preferred embodiment, the push rod 70 has two pushing arms 74, two The pushing arms 74 are arranged in 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, and the pushing arm 74 can extend into the hole 71 of the push rod. And the pushing arm 74 can protrude into the annular groove 64 of the screw 60 and abut against the end surface of the screwing unit 63.

As shown in FIG. 22, the outer peripheral surface of the push rod 70 is formed with a scale 73, and the push rod 70 is assembled in the zero return nut base 30, and the push rod 70 can linearly move relative to the zero return nut base 30, and The push rod 70 is rotatable together with the zero return nut base 30. In the preferred embodiment, the outer peripheral surface of the push rod 70 forms a front and rear axially extending rail portion 76. The rail portion 76 cooperates with the guide groove portion 37 of the zero return nut base 30 to make the push rod 70 relatively The zero return nut base 30 moves linearly, and the push rod 70 can rotate together with the zero return nut base 30.

As shown in FIG. 10 to FIG. 12, the rear end of the push rod 70 further has a sprocket fixing portion 75. The bottom sprocket 80 is provided with a fixing hole 82. The sprocket fixing portion 75 of the push rod 70 is fixed. Connected to the bottom toothed disc 80 In the fixing hole 82, a front end surface of the bottom toothed disc 80 forms a second engaging portion 81, and the second engaging portion 81 has a plurality of second oblique engaging teeth, and the second engaging portion 81 can The first engagement portion 45 at the rear end of the zero return nut 40 is selectively engaged with each other.

When the syringe is in use, in the initial state, as shown in FIG. 1, the vial connecting device 3 and the adjustable propulsion device 4 are separated, and the operation steps are as follows: as shown in FIG. 12, the syringe 1 is assembled. In the step of the vial 2, the vial 2 is first installed in the vial connecting device 3, and the vial 2 with the needle sheath is placed on the vial assembly portion 12 of the outer casing 10 in a side-mounted manner. Positioning, the bottle mouth at the rear end of the bottle body 2A of the vial 2 corresponds to the hole 15 in the outer casing base 11, and then the adjustable propulsion device 4 is inserted into the vial 2 through the vial connecting device 3, at this time, returning to zero The nut 40 is rotatable relative to the knob 20, and the return nut 40 is located in front of the bottom spur 80 of the adjustable propulsion device 4, and the return nut 40 and the bottom spur 80 are not in mesh with each other.

As shown in FIGS. 14 to 16, the syringe 1 is subjected to a zeroing step in which the push rod 70 of the adjustable propulsion device 4 is rotated, and the screw 60 screwed into the push rod 70 is driven by the force of the rotation of the push rod 70. The screw moves forward until the rubber plug connection end portion 62 at the front end of the screw 60 abuts against the rubber stopper 2B in the vial. Then, the zero-nut nut base 30 is pressed forward into the rotary knob 20, so that the latching portion 26 of the rotary knob 20 is engaged with the snap-in ring groove 332 at the position of the zero-returning nut base 30, and the zero-nut nut base is reset. The second locking portion 36 at the front end of the nut inner tube portion 35 of the 30 is engaged with the first locking portion 25 of the rear end surface of the knob inner panel 22 of the knob 20 to be in a locked state. Thereafter, the zero return nut 40 is rotated to the bottom toothed disc 80 at the rear end of the push rod 70, and the first engaging portion 45 at the rear end of the zero return nut 40 is opposed to the second engaging portion 81 of the front end surface of the bottom toothed disc 80. Engagement, as shown in FIG. 8 and FIG. 9, the rotary nut fixing piece 50 is turned again, and the zero return nut 40 is fixed on the zero return nut base 30, and the zero return nut 40 is fixed and cannot be moved. Return to zero step.

In the above-described step of resetting the syringe 1 after the vial 2 is assembled, as shown in FIGS. 17 to 18 and FIGS. 8 to 9, the rotary nut fixing piece 50 is steered to make the nut fixing piece 50 The ridge portion 53 is located at a position of the hollow portion 43 of the screwing strip 42 of the return-to-zero nut 40, and the return-to-zero nut base 30 is provided. The screw thread 341 interferes to fix the zero return nut 40 to the zero return nut base 30, and the return nut 40 is fixed and cannot be moved. On the other hand, the nut of the nut fixing piece 50 is fixed. The positioning flange 54 facing the side of the zero return nut 40 is engaged with the second positioning concave edge 47 to achieve a stable locking state.

As shown in FIG. 21 to FIG. 23, the step of adjusting the injection dose of the syringe 1 is performed by rotating (counterclockwise rotation) the rotary knob, and each of the rotary knobs 20 is adjusted by one fixed angle (in the preferred embodiment). For example, 1 unit is set to an injection dose of 0.1 ml) until it is adjusted to the scale required by the person to be injected.

In the foregoing step of adjusting the injection dose of the syringe 1, as shown in FIG. 5 and FIG. 6, the syringe 1 is disposed by the equiangular distribution of the two-way latch 17 at the rear end of the outer casing 10 and the inner peripheral wall of the front portion 211 of the casing 20 of the rotary knob 20. The combined configuration of the two unidirectional buckle grooves 213 of the equiangular distribution restricts the rotation of the rotary knob 20 to a fixed scale, and can no longer be reversely rotated, and the rotary knob 20 has a clear positioning sound every revolution of the rotary knob 20, and is provided for use. The voice can be used as an identification function for the adjustment of the injection dose adjustment.

As shown in FIG. 23, in the step of performing the injection, after the user adjusts the required scale 73 of the dose, the user can start to push the push rod 70 forward and push the rubber stopper 2B in the vial 2 via the screw 60. The chemical solution in the squeeze bottle 2 is output until the bottom toothed disc 80 at the rear end of the push rod 70 contacts the returning nut 40, and the injection is completed.

Through the above description, the syringe of the present invention mainly utilizes the combination structure of the medicine bottle connecting device and the adjustable propulsion device, so that the medicine bottle connecting device is connected to the medicine bottle and then installed in the adjustable propulsion device, that is, the medicine bottle connecting device can be utilized. The push button drives the push rod of the adjustable propulsion device to move backward to a predetermined scale. When the injection is pressed, even if the medicine bottle outputs a predetermined dose of the liquid medicine, the syringe of the present invention can be adjusted according to the needs of different injection objects. Injection dose.

Furthermore, the syringe of the present invention can also use the push rod of the rotary adjustable propulsion device to move the screw spiral provided in the push rod forward by the force of the rotation of the push rod until the rubber plug connection end of the screw front end abuts Before the rubber stopper in the medicine bottle, press the zero nut base forward and press it into the rotary button to lock it. status. After that, the zero-return nut is screwed to the bottom toothed disc at the rear end of the contact push rod to be relatively engaged, and then the rotating nut fixing piece is turned to make the zero return nut fixed on the zero return nut base, and the zero return is completed. The syringe has the initial zeroing function when the injection dose is adjusted, and the adjustment of the injection dose is more precise.

Claims (10)

A syringe with an injection dose adjustment function, comprising a vial connecting device and an adjustable propulsion device; wherein: the vial connecting device comprises: a casing comprising a casing base, a vial assembly portion and a combined tube The medicine bottle assembly portion and the joint tube portion are respectively formed at a front end and a rear end of the base portion of the outer casing, and the outer casing has a casing inner hole penetrating therethrough, and a fitting groove is formed in the medicine bottle assembly portion, the assembly groove Connecting a hole in the outer casing and forming a lateral opening; a rotary knob is unidirectionally arranged outside the joint pipe portion of the outer casing, the rotary button comprises a rotary button housing, a rotary inner plate, and a button a button inner tube and an inner hole, the inner plate of the button is formed inside the button housing, the inner tube of the button is located inside the button housing, and the inner tube of the button is connected to the inner panel of the button a front end, the inner hole is disposed in the inner tube of the rotation button and the inner panel of the rotary button; and a zero return nut base is coupled to the rear portion of the housing of the rotary button, the zero return nut base includes a base base and a base Assembly end, a set of joints, and a nut a connecting end portion and a group connecting portion are respectively formed at a front end and a rear end of the base of the base, and an inner shaft hole is formed in the reset nut base; the adjustable propulsion device can be installed in the vial connecting device The adjustable propulsion device comprises: a screw comprising a screw body and a rubber plug connecting end formed on the front end of the screw body, the screw body forming a plurality of screwing units on the outer peripheral surface of the screw body, and the plurality of screwing portions The units are arranged in equal order along the axial direction of the screw body, and each two adjacent screw units have a ring groove therebetween, and each of the screw units forms a spiral groove, and the spiral groove of each screw unit a rear end connecting the front and rear annular grooves respectively; and a push rod set in the zero return nut base, the push rod being linearly movable relative to the zero return nut base, the push rod Rotating together with the zero return nut base, a push rod middle hole is formed in the push rod, and the outer peripheral surface of the push rod is formed with a scale, and the push rod is formed with a screwing portion on the hole wall of the hole in the push rod, The screw is assembled in the middle hole of the push rod of the push rod, and the screwing portion of the push rod is screwed with the spiral groove of the screw, and the screw can rotate and move back and forth in the push rod, and the push rod has a push The 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 and abut against the end surface of the screwing unit. The syringe according to claim 1, wherein the outer casing forms two unidirectional snaps on the back side of the base of the outer casing with respect to the outer side of the joint tube, and the turn button is on the inner peripheral wall of the front section of the knob housing. Two unidirectional buckles are formed, and the two unidirectional buckles can be respectively hooked into the two unidirectional buckle grooves. The syringe having the injection dose adjustment function according to claim 1, wherein the inner shaft hole wall of the zero return nut base forms a front and rear axially extending guide groove portion, and the outer peripheral surface of the push rod forms a guide rail extending axially forward and backward. The rail portion cooperates with the guide groove portion of the zero return nut base to linearly move the push rod relative to the zero return nut base, and the push rod can rotate together with the zero return nut base. The syringe having the injection dose adjustment function according to claim 3, wherein the screw further has a blocking portion between the rubber plug connecting end portion and the screw body, and the screw portion of the screw can be located at the front end limit of the push rod. . The syringe having the injection dose adjustment function according to claim 2, wherein the inner shaft hole wall of the zero return nut base forms a front and rear axially extending guide groove portion, and the outer peripheral surface of the push rod forms a guide rail extending axially forward and backward. The rail portion cooperates with the guide groove portion of the zero return nut base to linearly move the push rod relative to the zero return nut base, and the push rod can rotate together with the zero return nut base. The syringe having the injection dose adjustment function according to any one of claims 1 to 5, wherein the rotary knob is provided with a catching portion on the inner peripheral wall of the rotary knob housing with respect to the rear of the rotary button inner panel; The outer peripheral surface of the assembled end portion of the zero return nut base is formed with a pivot ring groove and a snap ring groove arranged in a front-rear interval, and the outer peripheral surface of the set of the connecting portion forms a screw thread, and the inner tube portion of the nut is disposed at The inner end portion of the nut extends forwardly from the base of the base, and the front end of the inner tube portion of the nut forms a second locking portion, and the second locking portion has a plurality of locking concave edges. The assembly end portion of the cap base can be disposed in the rear portion of the casing of the rotary button, and the locking portion of the rotary button can be selectively engaged with any one of the pivoting ring groove and the snap ring groove. The second locking portion of the front end of the nut inner tube portion of the zeroing nut base can be locked and engaged with the first locking portion of the rear end surface of the rotary button inner plate of the rotary button; the vial connecting device further includes a return to zero a nut and a nut fixing piece, wherein: the returning nut forms a screwing hole, and the returning nut forms a screwing strip on the hole wall of the screwing hole, and a gap is formed in the screwing strip a peripheral wall of the zero return nut is formed with a pivot hole, the pivot hole is correspondingly connected to the hollow portion, and a rear end of the zero return nut forms a rear end An engaging portion, the zero return nut is disposed outside the group connecting portion of the zero return nut base, and the screwing strip is screwed with the screwing thread; the nut fixing piece comprises a piece body, a pivot column and a a rib portion is disposed on one end side of the sheet body, the rib portion is located at the other end of the pivot post relative to the sheet body, and the nut fixing piece pivots the pivoting nut to the zero nut In the hole, the sheet body is located on an outer side surface of the zero return nut, and the rib portion is located at a hollow portion of the screwing strip of the zero return nut, and the nut fixing piece is rotatable relative to the zero return nut. The rib portion is capable of changing a position of the vacant portion of the screw strip; the adjustable propulsion device is provided with a bottom toothed disc at a rear end of the push rod, and a front end surface of the bottom sprocket disc forms a second engaging portion. The second engaging portion is selectively engageable with the first engaging portion of the rear end of the return nut. The syringe having the injection dose adjustment function according to claim 6, wherein the outer peripheral surface of the return nut is provided with a first positioning concave edge and a second positioning concave edge on opposite sides of the pivot hole. a side of the nut fixing piece facing the zero return nut is provided with a positioning flange, and the positioning convex The edge can be selectively engaged with the first positioning concave edge and the second positioning concave edge with the rotation of the nut fixing piece. The syringe having the injection dose adjustment function according to claim 6, wherein the outer peripheral surface of the outer casing base of the outer casing is provided with an indication mark, and the rotary button is provided with a marking line on the outer circumferential surface of the rotary knob housing, and the marking wire can be combined with the outer casing The indication of the marking. The syringe having the injection dose adjustment function according to claim 6, wherein the outer peripheral surface of the zero return nut base is provided with a direction indicating mark for indicating the direction of rotation. The syringe having the injection dose adjustment function according to claim 6, wherein the outer peripheral surface of the outer casing base of the outer casing is provided with an indication mark, and the rotary button can be provided with a marking line on the outer circumferential surface of the rotary knob housing, and the marking line can The fitting of the indicator mark of the outer casing; the outer peripheral surface of the zero return nut base is provided with a direction indicating mark for indicating the direction of rotation.