CN111760131B

CN111760131B - Syringe for controlling anesthetic dosage

Info

Publication number: CN111760131B
Application number: CN202010761210.8A
Authority: CN
Inventors: 安静; 闫小强
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2022-09-16
Anticipated expiration: 2040-07-31
Also published as: CN111760131A

Abstract

The invention provides a syringe for controlling the anesthetic dosage, which effectively solves the problems that the anesthetic dosage injected each time in the injection of anesthetic in the prior art is inconsistent, the front and back injection dosages are not uniform, the anesthetic effect is influenced, and the operation is not facilitated; a planetary gear mechanism is arranged between the fixed plate and the shell, a hollow cylinder is arranged at the upper end of the gear ring, the upper end of a central shaft of the sun gear is fixed with the first bevel gear, a screw is arranged at the lower end of the planet carrier, a sliding cylinder is arranged at the lower end of the screw, and a piston head is arranged at the lower end of the sliding cylinder; there is the rotary drum in the hollow section of thick bamboo outside, and there is the fly leaf in the hollow section of thick bamboo outside, and the fly leaf can only reciprocate and can not rotate, has spiral groove on the rotary drum, has protruding piece on the rotary drum.

Description

Syringe for controlling anesthetic dosage

Technical Field

The invention relates to the technical field of medical anesthesia, in particular to an injector for controlling the dosage of anesthesia.

Background

The traditional injector mainly performs quantitative injection according to the scales on the cylinder wall, and the inaccurate control of the injection dosage can bring serious consequences due to the sight line and the hand speed of an operator. For example, local infiltration anesthesia commonly used in surgery often requires a plurality of quantitative injections, which are sequentially penetrated into the skin along one end of a surgical incision line to form a skin-hump band, and then local anesthetic is injected into the subcutaneous tissue through the skin-hump, so that the skin and the subcutaneous tissue can be cut. In the prior art, when the anesthetic is injected, an operator injects the anesthetic according to experience, so that the injection dosage is inconsistent, if the incision is long and the tissue needing operation is deep, the injection dosage is inconsistent, the injection dosage is not uniform, the anesthetic effect is influenced, and the operation is not facilitated.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the injector for controlling the anesthetic dosage, which effectively solves the problems that the anesthetic effect is influenced and the operation is not facilitated due to the condition that the dosage injected each time in the anesthetic injection in the prior art is inconsistent and the dosage injected before and after is not uniform.

The technical scheme includes that the injection device comprises a vertically placed injection syringe hollow cylinder, a horizontal fixing plate is arranged at the upper end of the hollow cylinder, a rectangular shell is arranged above the fixing plate, a gap is formed between the fixing plate and the shell, a horizontal first friction wheel capable of rotating is arranged in the shell, a first bevel gear coaxial with the first friction wheel is arranged in the shell, two spline cylinders capable of rotating are arranged in the shell, the two spline cylinders are bilaterally symmetrical and are radially arranged along a first friction disc, a second bevel gear meshed with the first bevel gear is arranged at one end of each spline cylinder, a spline shaft capable of sliding along the second bevel gear is inserted in each spline cylinder, one end, far away from the second bevel gear, of each spline shaft extends out of each spline cylinder, a second friction wheel is fixed at one end, extending out of each spline shaft, and the first friction wheel can drive the second friction wheel to rotate; a planetary gear mechanism is arranged in an interval between the fixed plate and the shell, wherein a hollow cylinder coaxial with the gear ring is arranged at the upper end of the gear ring, the upper end of the hollow cylinder penetrates through the side wall of the shell and is fixed with the first friction wheel, the upper end of a central shaft of the sun gear penetrates through the first friction wheel and is fixed with the first bevel gear, a screw coaxial with the planet carrier is fixed at the lower end of the planet carrier, a sliding cylinder capable of sliding up and down but not rotating in the hollow cylinder is sleeved at the lower end of the screw, the sliding cylinder is in threaded connection with the screw, the lower end of the sliding cylinder is a piston head, and the piston head is driven by the sliding cylinder to move downwards through the rotation of the screw;

the hollow cylinder outside cover be equipped with the rotary drum, install one way clutch between rotary drum and the hollow cylinder, there is the fly leaf of level form in the hollow cylinder outside, the rotary drum runs through the fly leaf, the fly leaf can only reciprocate and can not rotate, have a plurality of spiral helicine spiral grooves that are on the outer disc of rotary drum, have a plurality of protruding pieces with spiral groove one-to-one on the rotary drum, in the spiral groove that its corresponds is arranged in to the protruding piece, the fly leaf takes the protruding piece to move down and makes the rotary drum drive hollow cylinder rotate through spiral groove.

The invention has the advantages of ingenious structure, uniform injection dosage in the anesthetic injection process, uniform injection dosage before and after injection, convenient adjustment of injection dosage, smooth follow-up operation, wide adaptability, easy realization and convenient popularization.

Drawings

FIG. 1 is a front cross-sectional view of the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a sectional view taken along line a-a of fig. 1.

Fig. 4 is a view from direction B of fig. 1.

Fig. 5 is a cross-sectional view taken along line C-C of fig. 1.

Fig. 6 is a cross-sectional view taken along line D-D of fig. 1.

FIG. 7 is a schematic diagram of the transmission relationship of the present invention.

FIG. 8 is a schematic view of the structure of the drum and the grooves thereon in the present invention.

Detailed Description

The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 8, the injection syringe comprises a vertically placed syringe hollow cylinder 1, a horizontal fixing plate 2 is arranged at the upper end of the hollow cylinder 1, a rectangular shell 3 is arranged above the fixing plate 2, a gap is arranged between the fixing plate 2 and the shell 3, a horizontal and rotatable first friction wheel 4 is arranged in the shell 3, a first bevel gear 5 coaxial with the first friction wheel 4 is arranged in the shell 3, two rotatable spline cylinders 6 are arranged in the shell 3, the two spline cylinders 6 are bilaterally symmetrical and are radially arranged along a first friction disc, a second bevel gear 7 meshed with the first bevel gear 5 is arranged at one end of each spline cylinder 6, a spline shaft capable of sliding along the spline shaft is inserted in each spline cylinder 6, one end of each spline shaft, far away from the second bevel gear 7, extends out of each spline cylinder 6, a second friction wheel 8 is fixed at one end of each spline shaft, extending out of each spline shaft 6, and the first friction wheel 4 rotates to drive the second friction wheel 8 to rotate; a planetary gear mechanism is arranged in an interval between the fixed plate 2 and the shell 3, wherein the upper end of the gear ring 9 is provided with a hollow cylinder 10 coaxial with the gear ring, the upper end of the hollow cylinder 10 penetrates through the side wall of the shell 3 and is fixed with the first friction wheel 4, the upper end of a central shaft 11 of the sun wheel penetrates through the first friction wheel 4 and is fixed with the first bevel gear 5, the lower end of the planet carrier 12 is fixed with a screw 13 coaxial with the planet carrier, the lower end of the screw 13 is sleeved with a sliding cylinder 14 which can slide up and down in the hollow cylinder 1 but cannot rotate, the sliding cylinder 14 is in threaded connection with the screw 13, the lower end of the sliding cylinder 14 is a piston head, and the sliding cylinder 14 can drive the piston head to move downwards by the rotation of the screw 13;

the outer side of the hollow cylinder 10 is sleeved with a rotary cylinder 15, a one-way clutch is installed between the rotary cylinder 15 and the hollow cylinder 10, a horizontal movable plate 16 is arranged on the outer side of the hollow cylinder 10, the rotary cylinder 15 penetrates through the movable plate 16, the movable plate 16 can only move up and down and can not rotate, a plurality of spiral grooves 17 are formed in the outer circular surface of the rotary cylinder 15, a plurality of protruding blocks 18 which are in one-to-one correspondence with the spiral grooves 17 are arranged on the rotary cylinder 15, the protruding blocks 18 are arranged in the corresponding spiral grooves 17, and the movable plate 16 drives the protruding blocks 18 to move downwards to enable the rotary cylinder 15 to drive the hollow cylinder 10 to rotate through the spiral grooves 17.

In order to realize that the sliding cylinder 14 can only slide and can not rotate in the hollow cylinder 1, the section of the hollow cylinder 1 is oval, the edge of the piston head is tightly attached to the hollow cylinder 1, the piston head is fixedly connected with the sliding cylinder 14, and the piston head can only slide and can not rotate in the hollow cylinder 1.

In order to fix the housing 3 and to realize that the movable plate 16 can only move up and down, the outer side plate of the housing 3 is provided with an annular protrusion, the lower end of the annular protrusion is provided with a plurality of vertical upright posts 19, the lower end of the upright posts 19 penetrates through the movable plate 16 and is fixed with the fixed plate 2, the movable plate 16 can move up and down along the upright posts 19, and a tension spring is connected between the movable plate 16 and the annular protrusion.

In order to more accurately control the dose injected at each time and prevent relative rotation between the hollow cylinder 1 and the fixing plate 2, a flat plate 20 attached to the fixing plate 2 is fixed on the outer side of the upper end of the hollow cylinder 1, a plurality of positioning pins are arranged on the flat plate 20, a plurality of positioning holes corresponding to the positioning pins are arranged on the fixing plate 2, and the positioning pins are arranged in the positioning holes.

In order to install the spline cylinder 6, a vertical plate 21 corresponding to the spline cylinder 6 is fixed on the upper side plate of the housing 3, the spline cylinder 6 penetrates through the vertical plate 21, and a bearing is installed between the spline cylinder 6 and the vertical plate 21.

In order to simultaneously control the two second friction wheels 8 to be mutually far away from or close to each other along the radial direction of the first friction wheel 4, a rectangular block 22 is fixed on the upper end face of the shell 3, a double-end lead screw 23 parallel to the spline shaft penetrates through the rectangular block 22, nuts 24 are sleeved at two ends of the double-end lead screw 23, a connecting rod 25 is fixed at the lower end of each nut 24, a sliding groove corresponding to the lead screw is arranged on an upper side plate of the shell 3 and is parallel to the spline cylinder 6, the lower end of the connecting rod 25 extends into the shell 3 through the sliding groove, the connecting rod 25 can slide along the sliding groove, the spline shaft penetrates through the lower end of the connecting rod 25, and a bearing is arranged between the spline shaft and the connecting rod 25; the double-end lead screw 23 rotates to drive the two nuts 24 to move towards or away from each other, so that the connecting rod 25 drives the second bevel gear 7 to slide along the first friction wheel 4 in the radial direction through the spline shaft.

In order to press the movable plate 16 and facilitate operation, a horizontal pressing plate 26 is disposed above the housing 3, and the left and right ends of the pressing plate 26 are fixed to the movable plate 16 via a plurality of vertical support rods 27.

It is worth noting that the mode of the device for the medicine to enter the hollow cylinder 1 is various, a special medicine adding port can be arranged at the lower end of the hollow cylinder 1, a simple one-way valve can be additionally arranged on the hollow cylinder 1, and the device focuses on the traditional mode for sucking the medicine; the second friction wheel 8 moves along the radial direction of the first friction wheel 4 along with the spline shaft, the transmission ratio between the first friction wheel 4 and the second friction wheel 8 can be adjusted, namely the transmission ratio between the gear ring 9 and the sun gear can be changed, the final number of turns of rotation of the screw 13 and the downward displacement of the sliding barrel 14 are influenced, and the medicine output amount after each pressing is influenced finally; in the device, the fixing plate 2 is only attached to the flat plate 20 at the upper end of the hollow cylinder 1, can be pulled and detached, and is positioned by a positioning pin and a positioning hole to prevent relative rotation; the outer edge of the planet carrier 12 can protrude a part, so that the operation during dosing is convenient; the projection 18 is not disengaged from the spiral groove 17.

In the initial state, the piston head is at the lowest part of the cylinder, the needle head is arranged on the nipple under the empty cylinder 1, the empty cylinder 1 can be held by one hand, the flat plate 20 is pulled by the other hand, the anesthetic is sucked into the empty cylinder 1 by utilizing the negative pressure, after the operation is finished, the flat plate 20 is completely separated from the fixed plate 2, then the empty cylinder 1 is pinched by one hand, the convex part of the outer edge of the planet carrier 12 is pinched by the other hand, the two rotate relatively, the position of the sliding cylinder 14 is kept unchanged and tends to be upward in the rotation, the screw 13 and the flat plate 20 gradually descend, attention needs to be paid to the period that the piston head can move upwards by a small amount but can not descend at all, when the flat plate 20 and the fixed plate 2 approach to each other, the whole device is inverted, the needle head faces upwards, the position of the positioning pin and the positioning hole is adjusted, then the flat plate 20 of the fixed plate 2 is tightly attached to the piston head, meanwhile, the upward displacement can discharge bubbles in the empty cylinder 1, at this time, normal injection is possible. When in injection, a needle penetrates, the hollow cylinder 1 is kept still, the pressing plate 26 is pressed, the pressing plate 26 moves downwards, the movable plate 16 is driven by the supporting rod 27 to move downwards, the convex blocks 18 on the movable plate 16 slide in the spiral grooves 17 in the downward moving process, so that the rotary cylinder 15 rotates, the hollow cylinder 10 is driven by the one-way clutch to rotate, the hollow cylinder 10 drives the gear ring 9 and the first friction wheel 4 to rotate simultaneously, the first friction wheel 4 drives the second friction wheel 8 to rotate, the second friction wheel 8 drives the second bevel gear 7 to rotate by the spline shaft and the spline cylinder 6, the first bevel gear 5 drives the first bevel gear 5 to rotate, the first bevel gear 5 drives the sun gear to rotate by the central shaft 11, the gear ring 9 and the sun gear are simultaneously input, the planet carrier 12 outputs, the planet carrier 12 drives the screw 13 to rotate, the screw 13 rotates, so that the sliding cylinder 14 is driven by the piston head to extrude downwards, when the convex block 18 contacts the lower end of the groove 17, the pressing plate 26 is slowly released, the plate 20 drives the pressing plate 26 to restore upwards under the action of the tension spring through the supporting rod 27, and the one-way clutch on the rotary drum 15 idles at the moment, and the process is repeated until the medicine is used up.

In the above process, if there are bubbles in the hollow cylinder 1 after the fixing plate 2 is tightly attached to the plate 20, the needle should be kept upward, and the pressing plate 26 is pressed to press the piston head in the hollow cylinder 10 so that the bubbles are discharged from the needle at the upper end.

During the operation, different positions, different operations, different degree of depth tissue, different ages, different individuality, the composition of the anther that adopts is different, the dose of injection at every turn also needs the adjustment, during the adjustment, double-end lead screw 23 of rotatory casing 3 upper end, double-end lead screw 23 drives two nuts 24 and moves in opposite directions or back to back, nut 24 drives the integral key shaft through connecting rod 25 and removes, the integral key shaft drives second friction pulley 8 and along first friction pulley 4 radial sliding, realize the drive ratio change between first friction pulley 4 and the second friction pulley 8, namely, protruding piece 18 on the flat plate 20 makes ring gear 9 pivoted number of turns certain by recess 17 upper end slip recess 17 lower extreme in-process, on this basis, sun gear pivoted number of turns adjustable, finally make the number of turns rotation of screw rod 13 adjustable, and then adjust injection volume at every turn.

The invention has the outstanding advantages and remarkable progress that:

1. in the injection process, the invention can realize the control of consistent injection amount each time only by mechanically pressing the pressing plate 26, is convenient to operate, can realize continuous, multiple and quantitative injection, and has accurate and controllable liquid outlet amount.

2. According to the invention, the transmission ratio between the first friction wheel 4 and the second friction wheel 8 is adjusted by utilizing the change of the contact point of the second friction wheel 8 and the first friction wheel 4, the movable plate 16 reciprocates once to ensure that the number of the rotating circles of the gear ring 9 is constant, the number of the rotating circles of the sun wheel can be adjusted by screwing the double-head screw 23, and finally the distance of the piston head moving downwards can be adjusted, so that the medicine injection quantity of each time can be adjusted.

Claims

1. A syringe for controlling the anesthetic dose is characterized by comprising a vertically placed syringe hollow cylinder (1), a horizontal fixing plate (2) is arranged at the upper end of the hollow cylinder (1), a rectangular shell (3) is arranged above the fixing plate (2), a gap is formed between the fixing plate (2) and the shell (3), a first friction wheel (4) which is horizontal and can rotate is arranged in the shell (3), a first bevel gear (5) which is coaxial with the first friction wheel (4) is arranged in the shell (3), two spline cylinders (6) which can rotate are arranged in the shell (3), the two spline cylinders (6) are bilaterally symmetrical and are radially arranged along a first friction disc, a second bevel gear (7) which is meshed with the first bevel gear (5) is arranged at one end of each spline cylinder (6), a spline shaft which can slide along the spline cylinder is inserted in the spline cylinder (6), and one end, far away from the second bevel gear (7), of the spline shaft extends out of the spline cylinder (6), a second friction wheel (8) is fixed on one end of the spline shaft extending out of the spline cylinder (6), and the rotation of the first friction wheel (4) can drive the second friction wheel (8) to rotate; a planetary gear mechanism is arranged in an interval between the fixed plate (2) and the shell (3), wherein a hollow cylinder (10) coaxial with the hollow cylinder is arranged at the upper end of the gear ring (9), the upper end of the hollow cylinder (10) penetrates through the side wall of the shell (3) and is fixed with the first friction wheel (4), the upper end of a central shaft (11) of the sun wheel penetrates through the first friction wheel (4) and is fixed with the first bevel gear (5), a screw rod (13) coaxial with the planet carrier (12) is fixed at the lower end of the planet carrier (12), a sliding cylinder (14) capable of sliding up and down in the hollow cylinder (1) but incapable of rotating is sleeved at the lower end of the screw rod (13), the sliding cylinder (14) is in threaded connection with the screw rod (13), the lower end of the sliding cylinder (14) is a piston head, and the sliding cylinder (14) can drive the piston head to move downwards by the rotation of the screw rod (13);

the outer side of the hollow cylinder (10) is sleeved with a rotary cylinder (15), a one-way clutch is installed between the rotary cylinder (15) and the hollow cylinder (10), a horizontal movable plate (16) is arranged on the outer side of the hollow cylinder (10), the rotary cylinder (15) penetrates through the movable plate (16), the movable plate (16) can only move up and down and cannot rotate, a plurality of spiral grooves (17) are formed in the outer circular surface of the rotary cylinder (15), a plurality of protruding blocks (18) which are in one-to-one correspondence with the spiral grooves (17) are formed in the rotary cylinder (15), the protruding blocks (18) are arranged in the corresponding spiral grooves (17), and the movable plate (16) drives the protruding blocks (18) to move downwards to enable the rotary cylinder (15) to drive the hollow cylinder (10) to rotate through the spiral grooves (17);

a rectangular block (22) is fixed on the upper end face of the shell (3), a double-end lead screw (23) parallel to the spline shaft penetrates through the rectangular block (22), nuts (24) are sleeved at two ends of the double-end lead screw (23), a connecting rod (25) is fixed at the lower end of each nut (24), a sliding groove corresponding to the lead screw is formed in the upper side plate of the shell (3), the sliding groove is parallel to the spline cylinder (6), the lower end of each connecting rod (25) extends into the shell (3) through the sliding groove, each connecting rod (25) can slide along the corresponding sliding groove, the spline shaft penetrates through the lower end of each connecting rod (25), and a bearing is installed between each spline shaft and each connecting rod (25); the double-end screw rod (23) rotates to drive the two nuts (24) to move in the opposite direction or in the opposite direction, so that the connecting rod (25) drives the second bevel gear (7) to slide along the first friction wheel (4) in the radial direction through the spline shaft;

an annular bulge is arranged on an outer side plate of the shell (3), a plurality of vertical upright posts (19) are arranged at the lower end of the annular bulge, the lower end of each upright post (19) penetrates through the movable plate (16) and is fixed with the fixed plate (2), the movable plate (16) can move up and down along the upright posts (19), a tension spring is connected between the movable plate (16) and the annular bulge, and the movable plate (16) can only move up and down;

a flat plate (20) attached to the fixing plate (2) is fixed on the outer side of the upper end of the hollow cylinder (1), a plurality of positioning pins are arranged on the flat plate (20), a plurality of positioning holes corresponding to the positioning pins are arranged on the fixing plate (2), and the positioning pins are arranged in the positioning holes;

a horizontal pressing plate (26) is arranged above the shell (3), and the left end and the right end of the pressing plate (26) are fixed with the movable plate (16) through a plurality of vertical supporting rods (27).

2. The syringe for controlling the amount of anesthetic according to claim 1, wherein the cross section of the hollow cylinder (1) is oval, the edge of the piston head is tightly attached to the hollow cylinder, the piston head is fixedly connected with the sliding cylinder (14), and the piston head can only slide but cannot rotate in the hollow cylinder (1).

3. The injector for controlling the amount of anesthetic according to claim 1, wherein an upright plate (21) corresponding to the spline cylinder (6) is fixed on an upper side plate of the housing (3), the spline cylinder (6) penetrates through the upright plate (21), and a bearing is installed between the spline cylinder (6) and the upright plate (21).