TWI526230B - To syringe - Google Patents

Description

syringe

This creation is about a syringe, especially a syringe that combines the functions of safely controlling the dose of the injection and the labor-saving function.

In order to meet the purpose of quantitative injection, counting the number of injections, and limited re-use of the syringe, the currently known syringes are available in both metered and graduated syringes. Among them, the known metering type of syringe is mainly composed of a driving mechanism composed of a plurality of driving components connected to a push rod in a syringe casing, thereby installing a medicine bottle in the syringe casing at the front end of the syringe casing. A needle is arranged, and the needle is connected to the medicine bottle. When the needle is injected, the needle penetrates into a predetermined part of the human body, and after pressing the rear end of the push rod, the push rod is controlled by the driving part driving the driving mechanism, thereby pushing the piston in the medicine bottle to move. The stroke is used to output a predetermined dose of the medicament through the needle.

However, although the metered syringe is known to achieve the purpose of quantitatively outputting the medicament, however, the syringe is operated during the operation of the syringe due to the restriction of the linkage between the driving components of the driving mechanism of the syringe. The problem of laborious.

The main purpose of this creation is to provide a syringe that can be used to improve the operation of existing metering syringes.

In order to achieve the foregoing, the syringe proposed by the present invention is used for combining a medicine bottle and a needle. The syringe comprises: an outer casing, a hollow body having an opening formed at the front end; a joint collar, a group Provided at the front end of the outer casing, the inner portion of the joint collar has an inner ring portion, and a unidirectional ratchet groove having a plurality of single oblique ratchet teeth is formed in the inner ring portion; a medicine bottle casing is assembled in the joint a front end of the sleeve for fixing the medicament bottle, wherein a front end of the vial sleeve is detachably set on the needle set; an inner sleeve is installed in the outer sheath, the inner sleeve The front end of the tube is fixed in the joint collar; a bidirectional spiral guide tube set includes an outer spiral conduit and an inner spiral conduit, the outer spiral conduit is installed in the inner sleeve, and the outer spiral conduit includes a screw portion And a tube end formed at the front end of the spiral tube portion, the inner peripheral wall of the screw portion forms a spiral guide groove, and the outer peripheral surface of the tube end forms a plurality of single oblique ratchet elastic pieces, and the ratchet elastic pieces respectively abut the one-way of the joint collar The single oblique ratchet of the ratchet groove makes the outer spiral catheter only one way The inner spiral conduit is disposed in the inner sleeve and the outer spiral conduit, and the outer peripheral surface of the inner spiral conduit is provided with a plurality of spiral guide blocks, and the spiral guide block is inserted into the spiral guide groove of the outer spiral conduit to make the inner spiral conduit The outer spiral conduit can be rotated for a predetermined stroke distance, and a unidirectional ratchet groove having a plurality of single oblique ratchet teeth is formed in the inner portion of the inner spiral conduit; a screw ring is set in the tube end of the outer spiral conduit a threaded hole is formed in the threaded ring; a one-way ratchet is mounted in the one-way ratchet groove of the inner spiral conduit, the one-way ratchet includes a wheel body and a plurality of single oblique directions formed on the outer circumferential surface of the wheel a ratchet spring, a middle hole is formed in the wheel body, the single oblique ratchet spring meshes with a single oblique ratchet in the one-way ratchet groove; and a screw pusher includes a dose control section, a thread is arranged on the outer peripheral surface of the dose control section, and a shaft hole is formed in the screw push rod, and the screw push rod is installed in the bidirectional spiral guide tube group, and the dose control section of the screw push rod is screwed through the inside of the screw ring, and is used Pushing into the medicament bottle to apply a thrust; And an injection putter set, comprising an injection push rod and a push rod end cover, the injection push rod comprises a rod body and a pressing end portion disposed at the rear end of the rod body, and the rod of the injection push rod passes through the fixing In the hole of the one-way ratchet, the rod system can be axially slidably disposed in the shaft hole of the screw push rod, and the rear end and the pressing end of the rod of the injection push rod are located outside the inner spiral guide, and the push rod end The cover sleeve is disposed outside the pressing end portion of the push rod, and the rear end of the inner spiral conduit is pivotally disposed in the push rod end cover, so that the injection push rod group is combined with the one-way ratchet, the bidirectional spiral guiding tube group, the screw ring and the screw push rod Can cycle open and close action.

By assembling the whole combination of the front syringe, the syringe can be assembled, and after the needle is installed, the injection pusher can be quickly pulled to the preliminary injection position in a straight pull-back manner, and pressed in a straight direction. When the pusher set is injected, the spiral guide groove of the outer spiral conduit is combined with the large pitch stroke of the spiral guide block of the inner spiral conduit, and the screw hole of the screw joint and the thread of the screw push rod are combined for a small pitch stroke, and The direct pressing force is converted into a rotating force, and the large stroke rotary thrust is converted into the injection thrust of the small stroke rotation, which not only achieves the purpose of quantitative injection of drugs and good safety of use, but also uses the injection putter when the syringe is used. The combination of the one-way ratchet, the two-way spiral guiding tube set, the screwing ring and the screw push rod is created, so that it can achieve the labor-saving effect in the simple operation mode of the cycle opening and closing during the operation of the quantitative injection.

The creation can also be constructed by the combination of the check button of the inner sleeve and the reverse loop of the inner spiral conduit, so that the injection pusher set of the syringe must be pulled backwards to a predetermined position before the injection pusher group can be pressed. The injection is performed, and the backstop button of the inner sleeve is matched with the outer ring surface of the inner spiral conduit to generate a blocking limit function, and the inner spiral catheter is not pulled out along with the injection pusher group. Retraction by pressure, ensuring that the syringe can reach the set injection dose for each injection dose.

In addition, the creation syringe also includes a cover that allows the syringe to be removed before the cap can be removed, ensuring that the syringe can be replaced with a new needle each time it is used.

As shown in FIG. 1 and FIG. 2, a preferred embodiment of the present invention is disclosed. The syringe 1 is used to combine a medicament bottle 2 with a needle 3 and a needle cover 4. The composition of the syringe 1 mainly includes an outer portion. a casing 10, an engagement collar 20, a vial casing 30, an inner casing 40, a bidirectional spiral guiding tube set 50, a threaded ring 60, a one-way ratchet 70, a screw push rod 80, and An injection putter set 90, or the syringe 1 further includes a cover 5 .

As shown in FIG. 1 and FIG. 2, the outer casing 10 is a hollow body having an opening at both front and rear ends, and the front end of the outer casing 10 is a joint end 11.

As shown in FIG. 1 and FIG. 2, the joint collar 20 includes an engagement ring portion 21, a set of ring portions 22, and an inner ring portion 23. The joint ring portion 22 and the joint ring portion 21 are respectively engaged. The front end and the rear end of the collar 20 are located inside the joint collar 20, and the joint collar 20 is assembled inside the joint end 11 of the outer casing 10 with the joint ring portion 21, and the inner ring portion 23 is A one-way ratchet groove 24 having a plurality of single oblique ratchet teeth is formed. As shown in FIG. 3, in the preferred embodiment, the engaging collar 20 is provided with a plurality of hooks 25 between the inner ring portion 23 and the engaging ring portion 21, and the engaging collar 20 is engaged with the ring portion 21. An inner ring 26 may be further disposed between the inner ring portion 23.

As shown in FIG. 1 and FIG. 2, the vial casing 30 is assembled on the engaging ring portion 21 at the front end of the engaging collar 20 for fixing a drug bottle 2 therein. The front end of the vial case 30 can be provided with a set of 3 needles.

As shown in FIG. 1 to FIG. 3, the inner sleeve 40 is mounted inside the outer casing 10. The front end of the inner sleeve 40 extends into the joint ring portion 21 of the joint collar 20, and is sleeved in the inner ring. The outer portion of the portion 23 is fixed. In the preferred embodiment, the inner sleeve 40 is inserted into the engaging collar 20 at a front end thereof, and a card slot 41 is provided. The card slot 41 provides a hook 25 for engaging the collar 20 to be inserted therein. The inner ring 40 is sleeved on the outer side of the hook 25, and the inner sleeve 40 is engaged with the joint collar 20. The rear end of the inner sleeve 40 can extend out of the outer casing 10, and the rear end of the inner sleeve 40 forms a rear end. The check button 42 and the limit stop 43 are provided.

As shown in FIG. 1 to FIG. 3, the bidirectional spiral guiding tube set 50 includes an outer spiral tube 51 and an inner spiral tube 52. The outer spiral tube 51 is installed in the inner sleeve 40, and the outer spiral tube 51 includes a solenoid portion 511. The front end of the solenoid portion 511 forms a ring end wall 512 and a tube end 513 protruding forward from the ring end wall 512. The inner peripheral wall of the screw portion 511 forms a spiral guide groove 514, and the outer end of the tube end 513 A plurality of single oblique ratcheting elastic pieces 515 are formed on the surface, and an axially extending positioning concave portion 516 is disposed on the inner wall of the pipe end 513. As shown in FIG. 3 and FIG. 4, the pipe end 513 of the outer spiral conduit 51 extends into the engaging collar 20 In the inner ring portion 23, the ratcheting elastic pieces 515 abut against the single oblique ratchet teeth of the one-way ratchet groove 24 of the engaging collar 20, so that the outer spiral duct 51 can only rotate in one direction. As shown in FIG. 1 to FIG. 3, the inner spiral conduit 52 is disposed in the inner sleeve 40 and the outer spiral conduit 51. The inner peripheral surface of the inner spiral conduit 52 is provided with a plurality of spiral guide blocks 521 and is spiraled. The guiding block 521 is inserted into the spiral guiding groove 514 of the outer spiral conduit 51. By the cooperation of the spiral guiding block 521 and the spiral guiding groove 514, the inner spiral conduit 52 can rotate in the outer spiral conduit 51 for a predetermined stroke distance, and the inner spiral The outer peripheral surface of the rear portion of the duct 52 is formed with a plurality of check loops 522 arranged at intervals, and has a predetermined length of the axial guide groove 523. The reverse loop 522 is a single oblique direction, and the inner portion of the inner spiral conduit 52 is formed with a plurality of a one-way ratchet groove 524 having a single oblique ratchet, the single oblique ratchet of the one-way ratchet groove 524 being the same oblique direction as the single oblique ratchet of the one-way ratchet groove 24 of the engagement collar 20, The rear end of the inner spiral conduit 52 forms a pivoting portion 525. The pivoting portion 525 of the inner spiral conduit 52 can extend beyond the rear end of the inner sleeve 40. The backstop 42 of the rear end of the inner sleeve 40 can be disposed behind the inner spiral conduit 52. The reverse stop ring 522 and the extension guide groove 523 are changed between positions, as shown in FIG. 3 and FIG. 5, when the check button 42 extends into the shaft. In the guide groove 523, the inner spiral duct 52 can move forward in the axial direction, and when the check button 42 abuts against the check ring 522 of the inner spiral duct 52, the inner spiral duct 52 can be prevented from being mistakenly pressed toward the front axle. Move in a straight line.

As shown in FIG. 1 to FIG. 3, the threaded ring 60 is axially mounted in the tube end 513 of the outer spiral conduit 51. The threaded ring 60 defines a screw hole 61. The pitch of the screw hole 61 is smaller than that of the spiral. The pitch of the guide groove 514. In the preferred embodiment, the outer circumferential surface of the threaded ring 60 forms an axially extending positioning projection 62 that cooperates with the positioning recess 516 of the outer spiral conduit 51 to combine the screw ring 60 with the outer spiral conduit 51. .

As shown in FIG. 1 to FIG. 3, the one-way ratchet 70 is mounted in a one-way ratchet groove 524 of the inner spiral conduit 52. The one-way ratchet 70 includes a wheel body 71 and a plurality of shapes formed on the wheel body. a single oblique ratcheting piece 72 on the outer peripheral surface, a middle hole 73 is formed in the wheel body 71, and the middle hole 73 has a shape corresponding to the non-circular shaft hole of the screw push rod 80, and the single oblique ratchet of the one-way ratchet 70 The elastic piece 72 is in the same oblique direction as the single oblique ratchet elastic piece 515 of the tube end 513 of the outer spiral conduit 51. As shown in FIG. 5, the single oblique ratchet elastic piece 72 and the one-way ratchet groove 524 are single. Engage the ratchet.

As shown in FIG. 1 to FIG. 3, the auger 80 has a dose control section 81. The outer circumference of the dose control section 81 is provided with a thread, and the middle section of the screw pusher 80 forms a limit protrusion on the side edge of the dose control section 81. The rim 82, the non-circular shaft hole 83 is formed in the screw push rod 80, the screw push rod 80 is disposed in the bidirectional spiral guiding tube set 50, and the dose control section 81 of the screw push rod 80 is screwed through the screw ring 60 And can be pushed into the medicament bottle 2 to directly push against the piston 2A, or the front end of the dose control section 81 of the screw pusher 80 can be provided with a piston top block 84, so that the screw push rod 80 is pushed indirectly via the piston top block 84. The piston 2A in the vial 2 is received.

As shown in FIG. 1 to FIG. 3, the injection pusher set 90 includes an injection pusher 91 and a pusher end cover 92. The injection pusher 91 includes a rod 911 and a rear end of the rod 911. Pressing the end portion 912, the cross-sectional shape of the rod body 911 corresponds to the non-circular shaft hole 83 in the auger rod 80 and the non-circular middle hole 73 in the one-way ratchet 70, and the injection push rod 91 has its rod body 911 The shaft hole 83 of the screw push rod 80 can be axially slidably inserted, and the rod body 911 is fixed through the hole 73 in the one-way ratchet 70, wherein a positioning block 913 is formed on the rod body 911. The one-way ratchet 70 is fixed to the rod body 911 by the positioning stopper 913. The rod body 911 of the injection push rod 91 has a pressing end portion 912 and a rear end protrudes out of the inner spiral duct 52. The push rod end cover 92 is sleeved on the rod end cover 92. The outer side of the pressing end portion 912 of the injection push rod 91 is pivotally disposed in the push rod end cover 92 at the rear end of the inner spiral guide 52.

As for the use of the present syringe, as shown in FIG. 3 and FIG. 6, when the medicine bottle 2 is assembled, the medicine bottle 2 has one end of the piston 2A and is inserted into the joint collar in a state where the medicine bottle casing 30 is removed. 20 positioned, the piston top block 84 at the side end of the screw push rod 80 extends into the medicament bottle 2 to abut the piston 2A, and then sets the vial sleeve 30 outside the medicament bottle 2, and is combined with the vial sleeve 30. The combination of the collars 20 secures the vial 2 to the syringe 1. When the needle 3 and the needle cover 4 are not assembled on the vial casing 30, the medicine bottle 2 is assembled, and the pen cover 5 is first placed outside the vial casing 30.

When preparing for injection, as shown in FIGS. 3 and 7, the pen cover 5 is removed, and the needle 3 and the needle cover 4 are attached. One end of the needle 3 is inserted into the drug bottle 2, and the needle cover 4 is covered on the outside of the needle 3 to avoid The user is mistakenly stabbed by the needle 3. Next, the injection pusher set 90 is quickly pulled straight back to the predetermined position in the axial direction until the spiral guide block 521 of the outer peripheral surface of the inner spiral conduit 52 is moved to contact the inner end of the inner sleeve 40 at the limit retaining edge 43. Stay stopped. During the pulling process of the injection pusher group 90, the inner spiral conduit 52 is driven to move backward and idling inside the outer spiral conduit 51, and the check button 42 at the rear end of the inner sleeve 40 can be reversed on the inner spiral conduit 52. A bounce occurs at the stop ring 522 to generate sound, and the stop button 42 at the rear end of the inner sleeve 40 abuts against the limit of the check ring 522 of the inner spiral conduit 52, thereby preventing the injection pusher set 90 from being blocked. The function of driving the inner spiral conduit 52 linearly in the forward axial direction by the wrong pressure causes the injection pusher group 90 to be retracted without being crushed during the process of pulling back.

At the time of injection, as shown in Figs. 8 and 9, the needle cover is removed, the needle 3 is inserted into the predetermined injection site of the human body, and the injection pusher group 90 is pressed to start the injection, wherein the injection pusher group is pressed by the straight forward direction. Acting 90, and pushing the inner spiral conduit 52 via the push rod end cap 92, wherein the check button 42 at the rear end of the inner sleeve 40 enters the axial guide groove 523 of the inner spiral conduit 52, so that the inner spiral conduit 52 can The injection pusher group 90 moves straight forward together, and the outer spiral conduit 51 is driven to rotate in the forward direction by the spiral guide block 521 of the outer circumferential surface of the inner spiral conduit 52 until the inner spiral conduit 52 completes the travel of the outer spiral conduit 51. The injection pusher set 90 extends into the outer casing 10 to close, and when the outer spiral conduit 51 rotates in the forward direction, the screw ring 60 is rotated together, and the screw push rod 80 is rotationally driven to rotate forward through the screw ring 60 to the medicament bottle. The piston 2A in 2 applies a thrust to output the medicine in the medicine bottle 2 through the needle 3. In the foregoing, the spiral guide groove 514 of the predetermined circumference of the outer spiral conduit 51 cooperates with the spiral guide block 521 of the outer circumferential surface of the inner spiral conduit 52, and the screw ring 60 of the outer spiral conduit 51 is screwed. The cooperation of the screw push rod 80 enables the pressing and pressing push rod group 90 to directly advance the distance of the predetermined stroke at a time, and drives the screw ring 60 to drive the screw push rod 80 to rotate one turn to stop, thereby controlling the medicament bottle. 2 Output the set injection dose. On the other hand, by the combination of the helical guide groove 514 of the outer spiral conduit 51 and the large pitch stroke of the spiral guide block 521 of the inner spiral conduit 52, the screw hole of the screw ring 60 and the screw of the screw push rod 80 are small pitches. The stroke combination structure, and the large stroke rotary thrust is converted into the injection thrust of the small stroke rotation, so that the syringe 1 has a labor-saving effect during use.

After the injection is completed, the needle cover 4 is first sleeved on the outer side of the needle 3, and then the needle 3 and the needle cover 4 are pulled out from the syringe 1, and the pen cover 5 is closed on the outside of the vial casing 30 of the syringe 1, ensuring that You can replace the new needle 3 with one use. When the syringe 1 is in use, it is created by the injection pusher set 90 in combination with the one-way ratchet 70, the bidirectional spiral guiding tube set 50, the screwing ring 60 and the screw push rod 80, so that it can be injected every time. During the operation, it can be easily opened and closed by the user. Further, the number of threads and the pitch of the outer peripheral surface of the dose control section 81 of the screw pusher 80 are set according to the drug volume in the vial 2 to set the number of injections and the injection dose, so that the syringe 1 has the functions of fixed dose injection and automatic counting use. When the number of uses of the syringe 1 containing the drug bottle 2 reaches a predetermined number of times, the medicine in the drug bottle 2 is just used up. At this time, the syringe 1 is discarded to prevent the syringe 1 from being overused.

1‧‧‧Syringe
2‧‧‧Pharmaceutical bottles
2A‧‧‧Piston
3‧‧‧ needle
4‧‧‧ needle cover
5‧‧‧ pen cover
10‧‧‧ outer casing
11‧‧‧Binding end
20‧‧‧ Engagement collar
21‧‧‧Joint ring
22‧‧‧Group of Rings
23‧‧‧ Inner Ring Department
24‧‧‧ one-way ratchet groove
25‧‧‧ hook
26‧‧‧ Inner ring
30‧‧‧Pill bottle cover
40‧‧‧Inner casing
41‧‧‧ card slot
42‧‧‧Check button
43‧‧‧Limited retaining edge
50‧‧‧Two-way spiral guiding tube set
51‧‧‧External spiral catheter
511‧‧‧Spiral Department
512‧‧‧ ring end wall
513‧‧‧ tube end
514‧‧‧Spiral guide
515‧‧‧ ratchet shrapnel
516‧‧‧ positioning recess
52‧‧‧Inside spiral catheter
521‧‧‧Spiral guide block
522‧‧‧Check the ring pattern
523‧‧‧Axis guide slot
524‧‧‧One-way ratchet groove
525‧‧‧ pivotal
60‧‧‧ screw ring
61‧‧‧ screw holes
62‧‧‧ positioning convex
70‧‧‧One-way ratchet
71‧‧‧ wheel body
72‧‧‧Single oblique ratchet
73‧‧‧Medium hole
80‧‧‧Auger
81‧‧‧Dose control section
82‧‧‧Limited flange
83‧‧‧Axis hole
84‧‧‧Piston top block
90‧‧‧Injection putter group
91‧‧‧Injection putter
911‧‧‧ rod body
912‧‧‧ Pressing the end
913‧‧‧ Positioning stop
92‧‧‧Pushing end cap

1 is a perspective exploded view of a preferred embodiment of the present syringe and a needle and a needle cover. Figure 2 is a perspective exploded view of another viewing angle of a partial component of the syringe of Figure 1. Figure 3 is a schematic cross-sectional view showing the preferred embodiment of the syringe of Figures 1 and 2 without a needle or a cap. 4 is a schematic cross-sectional view showing the position A-A of the cut surface line shown in FIG. Figure 5 is a cross-sectional view showing the end of the cut line position B-B shown in Figure 3. Figure 6 is a schematic exploded view of the preferred embodiment of the syringe of Figures 1 to 3 with the pill cover removed, and the cap, needle, and needle cover. Figure 7 is a cross-sectional view showing the preferred embodiment of the syringe of Figures 1 to 3 with the pen cover removed, the needle and the needle cover attached, and the push rod pulled out to the predetermined position. Fig. 8 is a schematic cross-sectional view showing the preferred embodiment of the syringe of Figs. 1 to 3 with the needle cover removed and the injection of the push rod started. Figure 9 is a schematic cross-sectional view showing the preferred embodiment of the syringe of Figures 1 to 3 when the pusher is used to inject the metered dose.

1‧‧‧Syringe

2‧‧‧Pharmaceutical bottles

2A‧‧‧Piston

5‧‧‧ pen cover

10‧‧‧ outer casing

20‧‧‧ Engagement collar

21‧‧‧Joint ring

22‧‧‧Group of Rings

23‧‧‧ Inner Ring Department

24‧‧‧ one-way ratchet groove

25‧‧‧ hook

26‧‧‧ Inner ring

30‧‧‧Pill bottle cover

40‧‧‧Inner casing

41‧‧‧ card slot

42‧‧‧Check button

43‧‧‧Limited retaining edge

50‧‧‧Two-way spiral guiding tube set

51‧‧‧External spiral catheter

514‧‧‧Spiral guide

515‧‧‧ ratchet shrapnel

516‧‧‧ positioning recess

52‧‧‧Inside spiral catheter

521‧‧‧Spiral guide block

522‧‧‧Check the ring pattern

523‧‧‧Axis guide slot

524‧‧‧One-way ratchet groove

525‧‧‧ pivotal

60‧‧‧ screw ring

61‧‧‧ screw holes

70‧‧‧One-way ratchet

71‧‧‧ wheel body

73‧‧‧Medium hole

80‧‧‧Auger

81‧‧‧Dose control section

82‧‧‧Limited flange

83‧‧‧Axis hole

84‧‧‧Piston top block

90‧‧‧Injection putter group

91‧‧‧Injection putter

911‧‧‧ rod body

912‧‧‧ Pressing the end

913‧‧‧ Positioning stop

92‧‧‧Pushing end cap

Claims (6)

The utility model relates to a syringe for combining a medicine bottle and a needle. The syringe comprises: an outer casing, a hollow body formed with an opening at the front end; and a joint collar disposed at the front end of the outer casing, the joint sleeve The inner portion of the ring has an inner ring portion, and a unidirectional ratchet groove having a plurality of single oblique ratchet teeth is formed in the inner ring portion; a vial sleeve is assembled to the front end of the joint collar for the medicament The bottle is fixed, wherein the front end of the vial sleeve can be set on the detachable set of the needle; an inner sleeve is installed in the outer sheath, and the front end of the inner sleeve is fixed in the joint collar; The bidirectional spiral guiding tube set comprises an outer spiral conduit and an inner spiral conduit, wherein the outer spiral conduit is installed in the inner sleeve, the outer spiral conduit comprises a screw portion and a tube formed at the front end of the screw portion The inner peripheral wall of the spiral tube portion forms a spiral guide groove, and the outer peripheral surface of the tube end forms a plurality of single oblique ratchet elastic pieces which respectively abut on the single oblique ratchet teeth of the one-way ratchet groove of the engaging collar So that the outer spiral conduit can only rotate in one direction, and the inner spiral conduit is installed in In the sleeve and the outer spiral conduit, a plurality of spiral guide blocks are arranged on the outer peripheral surface of the inner spiral conduit, and the spiral guide block is inserted into the spiral guide groove of the outer spiral conduit, so that the inner spiral conduit can rotate in the outer spiral conduit for a predetermined stroke. a unidirectional ratchet groove having a plurality of single oblique ratchets is formed in the inner portion of the inner spiral conduit; a screw ring is disposed in the tube end of the outer spiral conduit, and a screw hole is formed in the screw ring; a one-way ratchet is mounted in the one-way ratchet groove of the inner spiral conduit, the one-way ratchet includes a wheel body and a plurality of single oblique ratchet springs formed on the outer circumference of the wheel body, and a middle hole is formed in the wheel body The single oblique ratchet spring meshes with a single oblique ratchet in the one-way ratchet groove; a screw pusher includes a dose control section, and a thread is arranged on the outer peripheral surface of the dose control section, and the spiral A shaft hole is formed in the push rod, and the screw push rod is installed in the bidirectional spiral guiding tube group, and the dose control portion of the screw push rod is screwed through the inside of the screw ring, and is used to extend into the medicine bottle to apply the thrust And an injection putter set comprising one a push rod and a push rod end cover, the injection push rod includes a rod body and a pressing end portion disposed at a rear end of the rod body, and the rod of the injection push rod passes through the hole fixed in the one-way ratchet wheel, and The rod system can be axially slidably disposed in the shaft hole of the screw push rod, the rear end and the pressing end of the rod of the injection push rod are located outside the inner spiral duct, and the push rod end cover is sleeved on the pressing end of the injection push rod The outer side of the inner spiral conduit is pivotally disposed in the push rod end cover, so that the injection push rod group can be combined with the one-way ratchet, the two-way spiral guide tube set, the screw ring and the screw push rod to circulate and open. The syringe according to claim 1, wherein the rear end of the inner sleeve forms a check button and a limit rib, and the outer peripheral surface of the inner portion of the inner spiral conduit forms a plurality of reverse loops and is provided with a predetermined length. The shaft guide groove, the check button can resist the reverse spiral of the inner spiral conduit to prevent the inner spiral guide from moving forward, and the check button is changed to the shaft guide groove, so that the inner spiral guide can be driven forward Movement, the limit retaining edge limits the position of the inner spiral catheter to move backward. The syringe according to claim 1 or 2, wherein the shaft hole of the screw push rod and the shape of the rod of the injection push rod are non-circular. The syringe according to claim 1 or 2, wherein the outer peripheral surface of the threaded ring forms an axially extending positioning convex portion, and the inner wall of the outer end of the outer spiral conduit forms a positioning concave portion by corresponding positioning The combination of the projection and the positioning recess allows the threaded ring to be positioned within the tube end of the outer spiral conduit. The syringe according to claim 4, wherein the front and rear ends of the engaging collar are respectively a joint ring portion and a set of ring portions, and the joint ring portion is disposed in the outer casing, and the joint collar is A plurality of hooks are disposed between the inner ring portion and the joint ring portion, and an inner ring is disposed between the joint ring portion and the inner ring portion; the inner sleeve extends into the inner end of the joint collar The card slot provides a hook for the engagement collar to be inserted therein, and the inner ring sleeve is sleeved on the outer side of the hook to engage and fix the inner sleeve and the engagement collar. The syringe of claim 5, wherein a tip end of the dose control section of the auger is provided with a piston top block.