A hand dialing type precision syringe

Abstract

The present application provides a kind of manual dialing type quantitative precision injector, including outer sleeve and core rod, outer sleeve rear end sleeve joint handle cover, handle cover inside is equipped with column shaft and swing block, swing block includes swing shaft and swing rod, swing shaft sleeve joint on column shaft, swing rod one end is connected with swing shaft, swing rod other end extends handle cover, swing block in the axial plane of outer sleeve swing, swing shaft rear end is equipped with lug, handle cover inside is equipped with limit block, spring leaf is equipped around limit block, spring leaf one end is equipped with tooth tip, swing block counterclockwise swing is limited by tooth tip, swing block clockwise swing is limited by limit block, when swing block clockwise swing, the lug of swing shaft is raised tooth tip, so that tooth tip is pressed tightly core rod;Limiting spring leaf and dialing swing shaft are set in the inside of injector to limit brake, rear pull core rod can easily cross spring leaf tooth tip, when push injection core rod injects liquid medicine, swing shaft is dialled upwards, core rod snap ring is not easy to cross spring leaf tooth tip, prevent overpushing, accurate extraction injection or transfer medicine.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of syringe technology, in particular to a hand dialing type quantitative precision syringe. BACKGROUND

[0002] The syringe is a device for injecting liquid medicine or extracting liquid. The syringe usually has a scale indicating the volume of liquid in the syringe. The existing syringe is manually judged by the scale on the injection tube when injecting liquid. The injection volume is greatly affected by human factors, and it is easy to over-inject, resulting in excessive injection volume at one time, which may cause medical accidents. SUMMARY

[0003] The purpose of the present application is to provide a hand dialing type quantitative precision syringe.

[0004] In order to achieve the above purpose, the technical scheme of the present application is:

[0005] A hand dialing type quantitative precision syringe, comprising a sleeve and a core rod, the front end of the sleeve is provided with a needle tube, the outside of the needle tube is sleeved with a sheath, the core rod is placed inside the sleeve, the front end of the core rod is provided with a piston, the sleeve comprises a needle seat and a rod sleeve, characterized in that,

[0006] The rear end of the sleeve is sleeved with a handle cover, the inside of the handle cover is provided with a column shaft and a swing block, the swing block comprises a swing shaft and a swing rod, the swing shaft is sleeved on the column shaft, one end of the swing rod is fixedly connected with the swing shaft, the other end of the swing rod extends out of the handle cover, the swing block swings in the axial plane of the sleeve, the lower part of the rear end of the swing shaft is provided with a protrusion, the inside of the handle cover is further provided with a limiting block, a spring sheet is arranged around the limiting block, one end of the spring sheet is provided with a 90° tooth tip with a fixed angle, the front side of the tooth tip limits the counterclockwise swing of the swing block, the front side of the limiting block limits the clockwise swing of the swing block, when the swing block swings clockwise to the limit position, the protrusion of the swing shaft lifts the tooth tip, so that the inner end of the tooth tip presses the core rod.

[0007] Further, the rear end of the sleeve is annularly protruded and provided with a base, the upper part of the handle cover is provided with an annular groove accommodating the base.

[0008] Further, the rear part of the core rod is provided with a first dose snap ring and a second dose snap ring, the first dose snap ring and the second dose snap ring are arranged in front of and behind each other; when the core rod is pulled backward to make the first dose snap ring or the second dose snap ring reach the tooth tip, the swing rod is dialled counterclockwise to make the core rod pass freely, and the swing rod is dialled clockwise to guide the core rod to pass;

[0009] When the core rod is pushed forward to make the first dose snap ring or the second dose snap ring reach the tooth tip, the swing rod is dialled counterclockwise to make the core rod pass freely, and the swing rod is dialled clockwise to make the core rod stop.

[0010] Further, the outer wall of the front side of the outer sleeve is provided with a first dose mark and a second dose mark, the first dose mark and the second dose mark are arranged in front of and behind each other, when the first dose collar reaches the tooth tip, the first dose mark is aligned with the front end of the piston, when the second dose collar reaches the tooth tip, the second dose mark is aligned with the front end of the piston.

[0011] Further, the middle part of the core rod is provided with a hard collar, the hard collar is in interference fit with the inner side of the outer sleeve, the inner side of the outer sleeve is provided with a hard stop, when the core rod is pulled back, the hard collar and the hard stop form a hard stop.

[0012] Further, the central recess of the rear end of the needle seat is provided with a cavity.

[0013] The present application sets a limiting spring sheet and a dialing swing shaft inside the syringe to limit and brake, the core rod can easily pass through the tooth tip of the spring sheet when pulled back, when the core rod is used to inject liquid medicine, the swing shaft is upwardly dialed, the core rod collar is not easy to pass through the tooth tip of the spring sheet, a larger force value is needed to pass through the elastic buckle to perform the next injection, which prevents over-injection, is used to control the amount of liquid medicine injected by the syringe, can accurately extract and transfer medicine, improves the detection accuracy of related instruments, and can prevent medical accidents. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0015] Figure 2 It is a schematic diagram of the structure of the core rod pulled back and the dialing swing lever counterclockwise;

[0016] Figure 3 It is a schematic diagram of the structure of the core rod pushed forward and the dialing swing lever clockwise;

[0017] Figure 4 It is a schematic diagram of the structure of the first dose collar of the core rod reaching the tooth tip;

[0018] Figure 5 It is a schematic diagram of the structure of the second dose collar of the core rod reaching the tooth tip;

[0019] Figure 6 It is a schematic diagram of the structure of the core rod completing injection.

[0020] REFERENCE SIGNS:

[0021] 1 outer sleeve, 2 core rod, 3 piston, 4 needle tube, 5 sheath, 6 handle cover, 7 swing shaft, 8 spring sheet,

[0022] 11 hard stop, 12 first dose mark, 13 second dose mark, 14 cavity,

[0023] 21 hard collar, 22 first dose collar, 23 second dose collar,

[0024] 61 column shaft, 62 limit block, 71 shaft hole, 72 protrusion, 81 tooth tip. DETAILED DESCRIPTION

[0025] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0026] The present application discloses a kind of manual dialing type quantitative precision injector, as shown in Figure 1 Including outer sleeve 1 and core rod 2, the front end of outer sleeve 1 is provided with needle tube 4, needle tube 4 outside sleeve 5 is connected, core rod 2 is placed in the inside of outer sleeve 1, the front end of core rod 2 is provided with piston 3, outer sleeve 1 includes needle seat and rod sleeve, as shown in Figure 6 The central recess of the rear end of needle seat is provided with cavity 14, cavity 14 is designed as low residual, the rear end of outer sleeve 1 is connected with handle cover 6, the rear end of outer sleeve 1 is provided with base along annular protrusion, the upper part of handle cover 6 is provided with annular groove containing base.

[0027] The middle part of core rod 2 is provided with hard collar 21, hard collar 21 is interference fit with the inside of outer sleeve 1, the inside of outer sleeve 1 is provided with hard stop 11, when core rod 2 is pulled back, hard collar 21 forms hard stop with hard stop 11.

[0028] As shown in Figure 1 The inside of handle cover 6 is provided with column shaft 61 and swing block, swing block includes swing shaft 7 and swing rod, swing shaft 7 is connected on column shaft 61 through the shaft hole 71 in the center, one end of swing rod is fixedly connected with swing shaft 7, the other end of swing rod extends out of handle cover 6, swing block swings in the axial plane where outer sleeve 1 is located.

[0029] The lower part of the rear end of swing shaft 7 is provided with protrusion 72, the inside of handle cover 6 is further provided with limit block 62, spring sheet 8 is provided around limit block 62, one end of spring sheet 8 is provided with 90° tooth tip 81 fixedly at an angle, the front side of tooth tip 81 limits when swing block swings counterclockwise, the front side of limit block 62 limits when swing block swings clockwise, when swing block swings clockwise to limit position, protrusion 72 of swing shaft 7 lifts tooth tip 81, so that the inner end of tooth tip 81 is pressed tightly to core rod 2.

[0030] The rear part of the core rod 2 is provided with a first dose snap ring 22 and a second dose snap ring 23, which are arranged in front of and behind each other. When the first dose snap ring 22 or the second dose snap ring 23 reaches the tooth tip 81 when the core rod 2 is pushed forward, the reverse pointer drives the swing rod to make the core rod 2 pass freely, and the clockwise pointer drives the swing rod to guide the core rod 2 to pass or stop.

[0031] Specifically referring to Figure 2 and Figure 3 When the first dose snap ring 22 or the second dose snap ring 23 is pulled backward to the tooth tip 81, when the clockwise pointer drives the swing shaft 7, the convex rotates clockwise to lift the tooth tip 81, and the core rod 2 can pass through the guide; when the reverse pointer drives the swing shaft 7, the convex rotates counterclockwise to lower the tooth tip 81, the tooth tip 81 is separated from the dose snap ring of the core rod 2, and the core rod 2 can pass freely.

[0032] When the first dose snap ring 22 or the second dose snap ring 23 is pulled backward to the tooth tip 81, when the clockwise pointer drives the swing shaft 7, the convex rotates clockwise to lift the tooth tip 81, and the core rod 2 can pass through the guide; when the reverse pointer drives the swing shaft 7, the convex rotates counterclockwise to lower the tooth tip 81, the tooth tip 81 is separated from the dose snap ring of the core rod 2, and the core rod 2 can pass freely.

[0033] The outer wall of the front side of the sleeve 1 is provided with a first dose mark 12 and a second dose mark 13, which are arranged in front of and behind each other, as shown in Figure 4 When the first dose snap ring 22 reaches the tooth tip 81, the first dose mark 12 is aligned with the front end of the piston 3, as shown in Figure 5 When the second dose snap ring 23 reaches the tooth tip 81, the second dose mark 13 is aligned with the front end of the piston 3.

[0034] The first dose mark 12 and the second dose mark 13 respectively mark a specific dose mark, at this time, the operator is prompted that the syringe has injected a corresponding amount of liquid medicine.

[0035] The dose snap ring of the core rod 2 can be provided with one or more according to actual use, and the dose mark of the core rod 2 can be provided with one or more according to actual use, and the dose snap ring and the dose mark are one-to-one corresponding through the swing and limiting structure above.

[0036] The present application sets a limiting spring sheet 8 and a driving swing shaft 7 inside the syringe to limit and brake. When the core rod 2 is pulled back to extract the liquid medicine, the driving swing shaft 7 is pulled down, the core rod 2 snap ring can easily pass through the tooth tip 81 of the spring sheet 8, and in the same way, the driving swing shaft 7 is pulled up, the core rod 2 snap ring can also pass through the tooth tip 81 of the spring sheet 8 through the one-way guiding of the spring sheet 8.

[0037] When the injection core rod 2 injects the liquid medicine, the swing shaft 7 is pushed upward, the core rod 2 snap ring is not easy to pass over the spring sheet 8 tooth tip 81, at this time, the operator is prompted that the syringe has injected a certain amount of liquid medicine, and the dose is a special set dose, and the arrow, dot or scale line mark is set at the pause position.

[0038] When the injection needs to be continued, a larger force value that is obviously different from the normal injection perception is used to pass over the elastic buckle to perform the next injection.

[0039] In this way, the over-injection can be prevented, and the amount of liquid medicine injected by the syringe can be controlled.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hand dialing precision syringe, comprising a sleeve and a plunger, a needle tube is arranged at the front end of the sleeve, a sheath is sleeved outside the needle tube, the plunger is arranged inside the sleeve, a piston is arranged at the front end of the plunger, the sleeve comprises a needle seat and a plunger sleeve, characterized in that, a handle cover is sleeved at the rear end of the sleeve, a column shaft and a swing block are arranged inside the handle cover, the swing block comprises a swing shaft and a swing lever, the swing shaft is sleeved on the column shaft, one end of the swing lever is fixedly connected with the swing shaft, the other end of the swing lever extends out of the handle cover, the swing block swings in the axial plane of the sleeve, a protrusion is arranged at the lower part of the rear end of the swing shaft, a limiting block is further arranged inside the handle cover, a spring sheet is arranged around the limiting block, a 90° tooth tip with a fixed angle is arranged at one end of the spring sheet, the front side of the tooth tip limits the counterclockwise swing of the swing block, the front side of the limiting block limits the clockwise swing of the swing block, when the swing block swings to the limit position, the protrusion of the swing shaft lifts the tooth tip, so that the inner end of the tooth tip presses the plunger; a base is arranged at the rear end of the sleeve along the annular protrusion, an annular groove accommodating the base is arranged at the upper part of the handle cover; a first dose snap ring and a second dose snap ring are arranged at the rear part of the plunger, the first dose snap ring and the second dose snap ring are arranged at intervals; when the plunger is pulled backward and the first dose snap ring or the second dose snap ring reaches the tooth tip, the plunger is freely passed by counterclockwise dialing of the swing lever, and the plunger is guided to pass by clockwise dialing of the swing lever; when the plunger is pushed forward and the first dose snap ring or the second dose snap ring reaches the tooth tip, the plunger is freely passed by counterclockwise dialing of the swing lever, and the plunger is stopped by clockwise dialing of the swing lever; a first dose mark and a second dose mark are arranged at the outer wall of the front side of the sleeve, the first dose mark and the second dose mark are arranged at intervals, when the first dose snap ring reaches the tooth tip, the first dose mark is aligned with the front end of the piston, and when the second dose snap ring reaches the tooth tip, the second dose mark is aligned with the front end of the piston.

2. The manual dial dosing precision syringe of claim 1, wherein, a hard snap ring is arranged at the middle part of the plunger, the hard snap ring is interference-fitted with the inside of the sleeve, a hard stopper is arranged at the inside of the sleeve, when the plunger is pulled backward, the hard snap ring and the hard stopper form a hard stop.

3. The manual dial dosing precision syringe of claim 1, wherein, a cavity is arranged in the central recess of the rear end of the needle seat.

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