CN113304377A - Syringe for anesthesia - Google Patents

Abstract

The invention discloses an injector for anesthesia, which comprises a needle cylinder 1, a positioning sleeve 2, a piston rod 3, a piston 4, a quantitative nut 5, an injection needle 6, a limiting sleeve 7, a limiting head 8, a sterilized cotton plug 9 and a filter plug 10. Wherein, the injection needle 6 is arranged on an injection nozzle at the bottom of the syringe 1, the piston 4 is arranged on the piston rod 3, and the piston rod 3 and the piston 4 are arranged in the syringe 1. The locating sleeve 2 is arranged at the top of the needle cylinder 1, the locating nut 5 is arranged on the locating sleeve 2, the limiting sleeve is arranged at the bottom of the needle cylinder 1, the limiting head 8 is arranged at the bottom of the limiting head 8, and the disinfecting cotton plug 9 is arranged in the limiting head 8. The injector for anesthesia provided by the invention is provided with the modularized quantitative and fixed depth component, and can realize the accurate control of the injection amount and the injection depth. In addition, the modularized arrangement can enable medical staff to freely assemble according to actual requirements, and injection in different modes such as routine, quantitative and fixed depth can be carried out.

Description

Syringe for anesthesia

Technical Field

The invention relates to an anesthetic syringe, in particular to a modular anesthetic syringe capable of adjusting injection amount and injection depth, and belongs to the technical field of anesthetic instruments.

Background

A syringe is a common medical injection device. The existing medical injector mainly comprises an injection needle, a syringe with a small hole and a piston rod matched with the syringe. When in use, the medical care personnel can suck all the injection into the syringe barrel at one time by referring to the scales on the syringe barrel, and after the injection needle is inserted into the body of a patient, the injection is required to be injected into the body of the patient at one time.

When using a syringe for anesthetic injection, the anesthesiologist needs to accurately control the injection amount of the anesthetic, and several anesthetic injections with different dosages may be required during the same operation. Although an anesthesiologist can control the amount of the injection liquid sucked into the syringe by using the scales on the syringe of the existing injector, the injection amount injected into a patient cannot be accurately controlled during injection, and the anesthesia effect is reduced. Moreover, when continuous anesthesia is performed, multiple injections are needed, the pushing distance of the piston rod is repeatedly calculated, the difficulty is high, the operation is complex, the anesthesia effect is reduced, and the risk of infection is increased.

In addition, the injection depth of different anesthesia position syringe needles is different, and the injection depth of syringe needle can't be adjusted according to the anesthesia position to current syringe, especially to the less anesthesiologist of experience, is difficult to control the injection depth of syringe needle more, very big reduction anesthesia effect.

The prior patent ZL200820050431.9 provides a pen-type injector with adjustable fixed quantity, which includes a fixed tube, a push head, a sleeve seat, a screw, a transmission tube, a stop ring, a fixed ring and other complicated structures to realize the fixed quantity injection of the injector, but the structure of the injector is complicated, the volume of the injector is obviously increased, the manufacturing cost is increased, and the operation is inconvenient.

The prior patent ZL201120365350.X discloses a portable insulin syringe, which is characterized in that a piston rod is arranged to be matched with a threaded rod and a threaded pipe, the injection quantity is adjusted by adjusting the whole length of the piston rod, although the structure is simple, quantitative injection can be realized, scales are positioned inside a needle cylinder, cannot be completely displayed, the adjustment is inconvenient, and the injection depth of an injection needle cannot be controlled.

Patent ZL201320126875.7 discloses a take syringe for anesthesia of mount, and it sets up branch in needle body both sides, sets up the sucking disc on the branch, though realize the accuracy of pricking to a certain extent, the degree of depth of its unable accurate control injection, the operation degree of difficulty still is very big.

In addition, the existing injector has single function, different injectors are required to be adopted according to different use scenes, the injectors are required to be separately produced during production, and the use amount and the production cost of the injectors are additionally increased.

Therefore, it is an urgent need to provide an anesthetic syringe which facilitates accurate quantitative and fixed-depth injection and which can change the function of the syringe according to actual conditions.

Disclosure of Invention

In view of the above-mentioned prior art, an object of the present invention is to provide an injector for anesthesia, which can accurately control the injection amount and the injection depth, and adopts a reasonable combination of module structures to achieve functions such as quantification, depth setting or general injection.

The purpose of the invention is realized by the following technical scheme.

An injector for anesthesia comprises a needle cylinder, a piston rod, a piston and an injection needle, wherein the needle cylinder comprises a cylinder body and an injection nozzle arranged at the bottom of the cylinder body, the injection needle is connected with the injection nozzle, the top of the cylinder body is provided with a top external thread, the piston rod comprises a rod body, a pressing block, a fixing plate and a piston connector, the rod body is formed by crossing a plurality of plate bodies, the pressing block is arranged at the top end of the rod body, the fixing plate is arranged at the bottom end of the rod body, the piston connector is arranged at the bottom end of the fixing plate, the top of the piston is provided with a piston connecting hole, the piston rod and the piston are connected with the piston connecting hole through the piston connector, and the piston rod further comprises a scale plate and a scale plate arranged at the top end of the scale plate; the outer side surface of the scale plate is provided with a first scale, the inner side surface of the scale plate is connected with the outer side surface of the plate body, the scale value of the first scale is gradually increased from top to bottom, and the lower bottom surface of the scale plate corresponds to the scale line of the first scale; still include the position sleeve, the position sleeve is used for injecing the injection volume of syringe, the position sleeve is including the cover body, cover body lateral surface is provided with location screw thread one and the bottom is provided with the internal thread, the position sleeve with the cylinder passes through the internal thread with top external screw thread threaded connection, the location screw thread part of the cover body is provided with the scale window one that link up, scale window one is used for the show the scale of scale board is first, the scale board slide set up in scale window one, threaded connection quantitative nut is gone up to location screw thread one, the minimum of 0 scale board home range is injectd to quantitative nut.

Furthermore, the number of the first scales is more than two.

Further, still include the thread bush, the lateral surface of thread bush is provided with location screw thread two and the cover is located the bottom of barrel, the position department of the location screw thread two of thread bush is provided with scale window two, set up scale two with the corresponding position of scale window two on the barrel, up crescent is down followed to the scale value of scale two.

Further, still include the thread bush, the lateral surface of thread bush is provided with two location screw threads and the cover is located the bottom of barrel, the position department of two location screw threads of thread bush is provided with the scale face, be provided with scale two on the scale face, up crescent is down followed to the scale value of scale two.

Further, still include the stop collar, the stop collar includes depthkeeping nut, spliced pole and screw ring, depthkeeping nut and screw ring pass through the spliced pole and connect, the internal thread of depthkeeping nut and the two screw-thread cooperations of the location screw of stop collar.

Furthermore, still include spacing head, spacing head including the spacing body with set up in the screwed joint at spacing body top, screwed joint with threaded ring threaded connection.

Furthermore, the limiting body is divided into a plurality of petal bodies by a gap.

Furthermore, the inner cavity of the limiting body is provided with a disinfection hemostatic cotton.

Furthermore, the syringe also comprises a clamping ear, and the clamping ear is arranged at the top of the positioning sleeve or the top of the syringe.

Furthermore, the number of the second scales is more than two.

The invention has the advantages that:

1. set up the position sleeve alone, outside screw-thread fit at the position sleeve has quantitative nut, scale window one has been seted up on the position sleeve, install the scale plate on the piston rod, set up scale one on the scale plate, observe scale one through scale window one, the position of 0 scale mark sets up 0 scale plate, 0 scale plate slides and sets up at scale window one, drive the position to 0 scale plate or piston rod is holistic through quantitative nut and carry on spacingly, the distance of top surface (the scale value that the top surface corresponds on the quantitative nut) is single injection volume under 0 scale plate bottom surface and the quantitative nut, only can adjust the injection volume through adjusting the position of quantitative nut on the position sleeve, and can carry out many times continuous control, moreover, the steam generator is simple in structure, and convenient for operation, injection volume control is accurate.

2. A threaded sleeve is provided separately for adjustment of the injection depth. When the injection depth is adjusted, the threaded sleeve is installed on the lower portion of the needle cylinder, the limiting sleeve is installed on the threaded sleeve in a threaded mode, the position of the limiting sleeve on the threaded sleeve is adjusted, the position of the injection needle relative to the limiting sleeve is adjusted, the injection depth is adjusted, the scale is used for indicating the injection depth, the injection depth can be adjusted according to the difference of anesthesia positions, the adjustment is convenient and accurate, and the anesthesia effect is greatly improved.

3. The ration and the depthkeeping of syringe are not integrated on the cylinder, but adopt the modularized design, and medical personnel freely assemble according to the injection demand, use in a flexible way, and module production carries out the weight production according to the demand during production, reduce cost.

4. The side of the needle tube of the injection needle is provided with the side spray hole which inclines downwards, so that the injection is prevented from impacting the needle hole vertically, the pain of injection is reduced, and the injection is prevented from overflowing along the needle hole.

5. A porous adsorption plug is arranged between the injection needle and the syringe to adsorb impurities in the injection liquid and prevent the impurities from being injected into the body of a patient. In addition, a flow limiting valve plate is further arranged according to needs, so that the flow resistance of the injection is increased, the injection in the needle cylinder is prevented from being polluted by the backflow of the injection when the injector is pulled out, and the use safety is improved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1: the syringe for anesthesia has a schematic three-dimensional structure.

FIG. 2: explosion diagram of syringe for anesthesia.

FIG. 3: the syringe structure is schematically shown.

FIG. 4: the structure of the positioning sleeve is schematic.

FIG. 5: the piston rod structure is schematically shown.

FIG. 6: a cross-sectional view of the piston rod.

FIG. 7: a cross-sectional view of the piston.

FIG. 8: an injection needle and a partial structure schematic diagram thereof.

FIG. 9: the structure schematic diagram of the limiting sleeve.

FIG. 10: schematic diagram of a limiting head structure.

FIG. 11: schematic diagram of adsorption plug structure.

Wherein, 1-syringe, 101-barrel, 102-top external screw thread, 103-screw thread sleeve, 104-scale window II, 105-injection nozzle, 106-limit convex ring, 2-positioning sleeve, 201-sleeve body, 202-clamping ear; 203-positioning convex ring, 204-scale window I, 205-internal thread, 3-piston rod, 301-rod body, 302-pressing block, 303-fixing plate, 304-scale plate, 305-0 scale plate, 306-piston connector, 4-piston, 401-piston connecting hole, 5-quantitative nut, 6-injection needle, 601-connecting cylinder, 602-needle tube, 603-side spraying hole, 7-limiting sleeve, 701-depth-setting nut, 702-threaded ring, 703-connecting column, 8-limiting head, 801-limiting body, 802-threaded connector, 803-gap, 9-sterilized hemostatic cotton, 10-adsorption plug and 1001-adsorption hole.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 1-11, according to the embodiment of the present invention, an anesthetic syringe is provided, which comprises a syringe 1, apositioning sleeve 2, apiston rod 3, a piston 4, adosing nut 5, aninjection needle 6, astop collar 7, astop head 8, sterilized hemostatic cotton 9, and an adsorption plug 10. The syringe 1 includes acylinder 101 and aninjection nozzle 105 disposed at the bottom of thecylinder 101. The top of thebarrel 101 is provided with a topexternal thread 102. The locatingsleeve 2 comprises asleeve body 201, a first locating thread is arranged on the outer side face of thesleeve body 201, thequantitative nut 5 is in threaded fit with the first locating thread on the outer side face of thesleeve body 201, and aninternal thread 205 is arranged at the bottom of thesleeve body 201. The syringe 1 and theretainer 2 are threadedly coupled by the topexternal thread 102 and theinternal thread 205. Thepositioning sleeve 2 further comprises a through scale window I204 positioned on the first positioning thread, a positioningconvex ring 203 positioned on the outer side of the bottom of thesleeve body 201 and a clampinglug 202 positioned on the top of thesleeve body 201, and the clampinglug 202 is in threaded connection with thesleeve body 201. Thepositioning collar 203 defines the lowest point of the range of motion of thedosing nut 5.

Thepiston rod 3 comprises arod body 301, apressing block 302, a fixingplate 303, ascale plate 304, a 0scale plate 305 and apiston connector 306. Therod body 301 is formed by a plurality of plate bodies which are crossed, and the cross section of the rod body is in a shape of one, ten and the like. Thescale plate 304 is fixed on the plate body of therod body 301 and corresponds to the scale window I204 on thepositioning sleeve 2, the outer side surface of the scale plate is provided with a scale I, and the scale value of the scale I is gradually increased from top to bottom. The top of thescale plate 304 is provided with a 0scale plate 305, and the lower bottom surface of the 0scale plate 305 corresponds to the 0 scale mark of the first scale. 0scale plate 305 protrudes scale window one 204 and is in sliding fit, on one hand, thepiston rod 3 is circumferentially limited through the fit of 0scale plate 305 and scale window one 204, and on the other hand, thepiston rod 3 is axially limited through the fit of 0scale plate 305 andquantitative nut 5. The scale between the 0scale plate 305 and thedosing nut 5 is shown as the shot size, i.e. the scale number corresponding to the top surface of thedosing nut 5. The number of thefirst scale windows 204 and thescale plates 304 is more than one, and for the convenience of scale observation, the number of thefirst scale windows 204 and thescale plates 304 is preferably two and the two are symmetrically arranged. In addition, thepressing block 302 is disposed on the top of therod 301, and thepiston connector 306 is disposed on the bottom of the fixingplate 303. The top of the piston 4 is provided with a piston coupling hole 401. Thepiston rod 3 is connected with a piston connecting hole 401 of the piston 4 through apiston connector 306. In addition, in order to facilitate the rotation of thequantitative nut 5, the outer side surface of thequantitative nut 5 is provided with anti-slip threads. The position of thequantitative nut 5 on the first positioning thread is adjusted by rotating thequantitative nut 5, so that the distance between thequantitative nut 5 and the 0scale plate 305 is adjusted, and the injection amount in a single injection is adjusted. For the convenience of operation, the positioningconvex ring 203 limits the lower limit position of thequantitative nut 5. In addition, in order to facilitate reading of the numerical value, thequantitative nut 5 is provided with an indication mark for pointing to a scale mark.

The structure of theinjection needle 6 comprises a connectingcylinder 601 and aneedle tube 602 connected with the connectingcylinder 601 in a penetrating way, wherein theinjection needle 6 is connected with theinjection nozzle 105 of the needle tube 1 in a sleeved way through the connectingcylinder 601. An adsorption plug 11 is provided between the connectingcylinder 601 and thenozzle 105, and a plurality of adsorption holes 1101 are provided in the adsorption plug 11. The adsorption plug 11 is made of an adsorption material and is used for adsorbing impurities in the injection to prevent the impurities from being injected into the patient. Theneedle tube 602 has a bottom nozzle hole at the bottom, and is provided with more than one side nozzle holes 603 on the side surface, the side nozzle holes 603 can make the injection or the anesthetic uniformly enter the organism tissue, the anesthetic effect is increased, the speed of the anesthetic during injection can be reduced, the impact of the anesthetic on the side wall of the needle hole is reduced, and the pain during anesthetic injection is reduced. The axis ofside nozzle hole 603 is perpendicular to the axis ofneedle tube 602 or has an angle, i.e., the direction of the opening ofside nozzle hole 603 is inclined downward or upward with respect toneedle tube 602. Preferably, the direction of the opening of theside nozzle hole 603 is inclined downwards relative to theneedle tube 602, theside nozzle hole 603 with the downward inclined opening can avoid that the vertical anesthetic vertically impacts the side wall of the needle hole when spraying, but slowly enters the body tissue along the side wall of the needle hole at a certain angle, so that the pain is further reduced, and the downward inclined of theside nozzle hole 603 relative to the upward inclined can prevent the liquid medicine from overflowing out of the needle hole along the side wall of the needle hole to cause the waste of the liquid medicine. In addition, in order to prevent the back flow of the anesthetic and the body tissue liquid medicine during multiple anesthetics, a flow limiting valve plate may be provided between the connectingtube 601 and theinjection nozzle 105 in addition to the adsorption plug 11, so as to increase the resistance when the anesthetic passes through, and prevent the back flow of the anesthetic and the body tissue liquid medicine from contaminating the liquid medicine inside the syringe 1.

The bottom of thecylinder 101 is sleeved with a threadedsleeve 103, and a limiting structure is arranged between the threadedsleeve 103 and thecylinder 101, preferably, the limiting structure is a protrusion and/or a groove arranged on thecylinder 101 along the axial direction or the circumferential direction thereof, and a groove and/or a protrusion arranged inside the threadedsleeve 103 along the axial direction or the circumferential direction thereof. The outer side surface of the threadedsleeve 103 is provided with a second positioning thread, the top of the second positioning thread is provided with a second limitconvex ring 106, the second positioning thread is provided with asecond scale window 104, the bottom of thecylinder 102 is provided with a second scale corresponding to thesecond scale window 104, the second scale is used for displaying the injection depth, and the second scale is gradually increased from bottom to top. The number of thescale window 104 and the second scale of the injection depth is more than one, and preferably two are symmetrically arranged. In addition, for the convenience of production and processing, the second scale can be arranged on the threadedsleeve 103. Wherein, thesecond scale window 104 arranged at the thread part of thethread sleeve 103 is improved into a scale surface, the second scale is arranged on the scale surface, and then thethread sleeve 103 with the second scale is directly sleeved to the bottom of the needle cylinder 1.

Thestop collar 7 structurally comprises a depth-settingnut 701, a connectingcolumn 703 and a threadedring 702, wherein the depth-settingnut 701 and the threadedring 702 are connected through more than one connectingcolumn 703. Thedepth setting nut 701 is in threaded connection with the threaded part of thestop collar 103 through internal threads. Thespacing head 8 comprises aspacing body 801 and a threaded joint 802 arranged at the top of thespacing body 801. The limitinghead 8 is in threaded connection with the limitingsleeve 7 through the external threads of the threaded joint 802 and the internal threads of the threadedring 702. Thestopper 801 of thestopper 8 is divided into a plurality of lobes byslits 803. The distance between the bottom surface of the limitingbody 801 and the bottom end of theneedle tube 602 is the injection depth, and the scale value on the second scale corresponding to the top surface of the depth-settingnut 701 is the injection depth value. The anaesthetist rotates thethread sleeve 7 according to the requirement of the injection depth of different anaesthesia positions to ensure that the top surface of the depth-fixingnut 701 reaches the corresponding scale value of the second scale so as to adjust the injection depth.

Thestop body 801 can be made in different sizes and shapes, and the size and shape of thestop head 801 can be reasonably selected by an anesthesiologist according to different anesthesia parts so as to facilitate operation. Further, the cavity inside the limitingbody 801 is provided with the sterilized hemostatic cotton 9, and after the injection is completed, an anesthesiologist can directly press the sterilized hemostatic cotton 9 on the needle hole through thegap 803 to sterilize and stop bleeding.

The invention modularizes the quantitative component and the depth-setting component of the injector for anesthesia, and in the actual using process: when a conventional injection is performed, an anesthesiologist directly connects the clampinglug 202 on theexternal thread 102 on the top of the needle cylinder 1 in a threaded manner, thepiston rod 3 and the piston 4 are inserted into the needle cylinder 1, theinjection needle 6 is installed on theinjection nozzle 105 at the bottom of the needle cylinder 1, and the injection is performed according to a conventional injection step. When quantitative injection is carried out, the clampinglug 202 is required to be installed at the top of thepositioning sleeve 2, thequantitative nut 5 is in threaded connection with a first positioning thread on the outer side surface of thepositioning sleeve 2, thepositioning sleeve 2 is in threaded connection with a first topexternal thread 102 on the top of the needle cylinder 1 through aninternal thread 205 at the bottom, thepiston rod 3 and the piston 4 are inserted into the needle cylinder 1, meanwhile, the 0scale plate 305 slides in afirst scale window 204 of thepositioning sleeve 2, theinjection needle 6 is installed on theinjection nozzle 105 at the bottom of the needle cylinder 1, after the injection extracts anesthetic, thequantitative nut 5 is rotated according to the required injection amount to align the top surface of thequantitative nut 5 with the corresponding scale value on the first scale, namely the injection amount, after the injection needle is inserted into organism tissue, thepiston rod 3 is driven to move downwards, when the 0scale plate 305 abuts against the top surface of thequantitative nut 5, the injection is finished at this time, the injection amount is the injection amount adjusted in advance, theneedle 6 is pulled out. When the depth setting injection is required, the threaded sleeve 103 is required to be arranged at the bottom of the needle cylinder 1, the depth setting nut 701 of the position limiting sleeve 7 is arranged at the threaded part of the threaded sleeve 103 in a threaded manner, the threaded joint 802 of the position limiting head 8 is arranged on the threaded ring 702 in a threaded manner, an anaesthetist presets injection depth according to different injection parts, the position of the depth setting nut 701 at the threaded part of the threaded sleeve 703 is adjusted by rotating the position limiting sleeve 7, the scale value on the second scale corresponding to the upper end surface of the depth setting nut 701 is the distance from the lower end surface of the position limiting body 801 of the position limiting head 8 to the bottom end of the needle tube 602, namely the injection depth, the sterile hemostatic cotton 9 is stuffed in the cavity inside the position limiting body 801, the needle tube 602 directly pricks the anesthesia injector into corresponding body tissues under the limiting effect of the position limiting sleeve 7 and the position limiting head 8, the pricked depth is the set injection depth, after the injection is finished, the sterile hemostatic cotton 9 is pressed through the gap 803, the needle tube 602 of the injection needle is drawn out, and the sterilized hemostatic cotton 9 stays at the needle hole part, so as to stanch on one hand and prevent the anesthetic from overflowing on the other hand.

In conclusion, the quantitative and fixed-depth components of the anesthesia injector are modularized, medical workers can assemble the anesthesia injector according to actual requirements, the requirements of routine injection, quantitative injection, fixed-depth injection and the like are met, and the anesthesia injector is simple in structure, convenient to use, flexible to manufacture and low in cost.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

Translated fromChinese

1.一种麻醉用注射器，包括针筒(1)、活塞杆(3)、活塞(4)、注射针(6)，所述针筒(1)包括筒体(101)和设置于所述筒体(101)底部的注射嘴(105)，所述注射针(6)和所述注射嘴(105)连接，其特征在于：所述筒体(101)的顶部设置有顶部外螺纹(102)，所述活塞杆(3)包括杆体(301)、按压块(302)、固定板(303)和活塞连接头(306)，所述杆体(301)为多个板体交叉而成，所述按压块(302)设置于所述杆体(301)顶端，所述固定板(303)设置于所述杆体(301)底端，所述活塞连接头(306)设置于所述固定板(303)的底端，所属活塞(4)顶部设置有活塞连接孔(401)，所述活塞杆(3)和所述活塞(4)通过所述活塞连接头(306)与所述活塞连接孔(401)连接，所述活塞杆(3)还包刻度板(304)和设置于刻度板(304)顶端的0刻度板(305)；所述刻度板(304)的外侧面设置有刻度一且内侧面与所述板体的外侧面连接，所述刻度一的刻度值从上往下逐渐增大，所述0刻度板(305)的下底面与刻度一的0刻度线对应；还包括定位套(2)，所述定位套(2)用于限定注射器的注射量，所述定位套(2)包括套体(201)，所述套体(201)外侧面设置有定位螺纹一且底部设置有内螺纹(205)，所述定位套(2)和所述针筒(1)通过所述内螺纹(205)和所述顶部外螺纹(102)螺纹连接，所述套体(201)的定位螺纹一部分设置有贯通的刻度窗口一(204)，所述刻度窗口一(204)用于展示所述刻度板(304)的刻度一，所述0刻度板(305)滑动设置于所述刻度窗口一(204)中，所述定位螺纹一上螺纹连接定量螺母(5)，所述定量螺母(5)限定0刻度板(305)活动范围的最低点。1. A syringe for anesthesia, comprising a syringe (1), a piston rod (3), a piston (4), an injection needle (6), the syringe (1) comprising a cylinder (101) and a The injection nozzle (105) at the bottom of the cylinder body (101), the injection needle (6) is connected with the injection nozzle (105), and it is characterized in that: the top of the cylinder body (101) is provided with a top external thread (102) ), the piston rod (3) includes a rod body (301), a pressing block (302), a fixing plate (303) and a piston connector (306), and the rod body (301) is formed by crossing a plurality of plate bodies, so The pressing block (302) is arranged at the top end of the rod body (301), the fixing plate (303) is arranged at the bottom end of the rod body (301), and the piston connector (306) is arranged at the fixing plate (303) ), the top of the corresponding piston (4) is provided with a piston connection hole (401), and the piston rod (3) and the piston (4) are connected to the piston connection hole (401) through the piston connection head (306). 401) connection, the piston rod (3) also wraps the scale plate (304) and the 0 scale plate (305) arranged on the top of the scale plate (304); the outer side of the scale plate (304) is provided with a scale and The inner side is connected with the outer side of the plate body, the scale value of the scale 1 gradually increases from top to bottom, and the lower bottom surface of the 0 scale plate (305) corresponds to the 0 scale line of the scale 1; also includes positioning A sleeve (2), the positioning sleeve (2) is used to limit the injection volume of the syringe, the positioning sleeve (2) includes a sleeve body (201), and the outer side of the sleeve body (201) is provided with a positioning thread and a bottom An inner thread (205) is provided, the positioning sleeve (2) and the needle cylinder (1) are threadedly connected with the inner thread (205) and the top outer thread (102), and the sleeve body (201) A part of the positioning thread is provided with a through scale window one (204), the scale window one (204) is used to display the scale one of the scale plate (304), and the 0 scale plate (305) is slidably arranged on the In the scale window 1 (204), the positioning thread 1 is threadedly connected with a quantitative nut (5), and the quantitative nut (5) defines the lowest point of the movable range of the 0 scale plate (305).2.根据权利要求1所述的一种麻醉用注射器，其特征在于：所述刻度一的数量为两个以上。2 . The anesthesia syringe according to claim 1 , wherein the number of the scale one is more than two. 3 .3.根据权利要求1所述的一种麻醉用注射器，其特征在于：还包括螺纹套(103)，所述螺纹套(103)的外侧面设置有定位螺纹二且套设于所述筒体(101)的底部，所述定位螺纹二处设置有刻度窗口二(104)，在所述筒体(102)上与刻度窗口二(104)的对应位置设置刻度二，所述刻度二的刻度值从下往上逐渐增大。3. An anesthesia syringe according to claim 1, characterized in that it further comprises a threaded sleeve (103), the outer side of the threaded sleeve (103) is provided with two positioning threads and is sleeved on the cylindrical body At the bottom of (101), a scale window two (104) is provided at the second position of the positioning thread, and a scale two (104) is provided on the cylinder body (102) at the corresponding position of the scale window two (104). The scale of the scale two The value increases gradually from bottom to top.4.根据权利要求1所述的一种麻醉用注射器，其特征在于：还包括螺纹套(103)，所述螺纹套(103)的外侧面设置有定位螺纹二且套设于所述筒体(101)的底部，所述螺纹套(103)的定位螺纹二的位置处设置有刻度面，所述刻度面上设置有刻度二，所述刻度二的刻度值从下往上逐渐增大。4. An anesthesia syringe according to claim 1, characterized in that it further comprises a threaded sleeve (103), the outer side of the threaded sleeve (103) is provided with two positioning threads and is sleeved on the cylindrical body At the bottom of (101), a scale surface is provided at the position of the second positioning thread of the threaded sleeve (103), the scale surface is provided with a scale two, and the scale value of the scale two gradually increases from bottom to top.5.根据权利要求1所述的一种麻醉用注射器，其特征在于：还包括限位套(7)，所述限位套(7)包括定深螺母(701)、连接柱(703)和螺纹环(702)，所述定深螺母(701)和螺纹环(702)通过连接柱(703)连接，所述定深螺母(701)的内螺纹与限位套(103)的定位螺纹二螺纹配合。5. A syringe for anesthesia according to claim 1, characterized in that: further comprising a limit sleeve (7), the limit sleeve (7) comprising a depth-fixing nut (701), a connecting post (703) and A threaded ring (702), the depth-fixing nut (701) and the threaded ring (702) are connected through a connecting column (703), the inner thread of the depth-fixing nut (701) and the positioning thread of the limiting sleeve (103) are two Thread fit.6.根据权利要求5所述的一种麻醉用注射器，其特征在于：还包括限位头(8)，所述限位头(8)包括限位体(801)和设置于所述限位体(801)顶部的螺纹接头(802)，所述螺纹接头(802)和所述螺纹环(702)螺纹连接。6 . The anesthesia syringe according to claim 5 , further comprising a limit head ( 8 ), the limit head ( 8 ) comprising a limit body ( 801 ) and a limit body ( 801 ) arranged at the limit. 7 . A threaded joint (802) on the top of the body (801), the threaded joint (802) and the threaded ring (702) are threadedly connected.7.根据权利要求6所述的一种麻醉用注射器，其特征在于：所述限位体(801)被缝隙(803)分隔为多个瓣体。7 . The anesthesia syringe according to claim 6 , wherein the limiting body ( 801 ) is divided into a plurality of valve bodies by slits ( 803 ). 8 .8.根据权利要求1所述的一种麻醉用注射器，其特征在于：所述限位体(801)的内腔设置有消毒止血棉(9)。8 . The anesthesia syringe according to claim 1 , wherein a sterile hemostatic cotton ( 9 ) is arranged in the inner cavity of the limiting body ( 801 ). 9 .9.根据权利要求1所述的一种麻醉用注射器，其特征在于：还包括夹持耳(202)，所述夹持耳(202)安装在定位套(2)顶部或者针筒(1)的顶部。9. The anesthesia syringe according to claim 1, characterized in that it further comprises a clamping ear (202), and the clamping ear (202) is mounted on the top of the positioning sleeve (2) or the syringe (1) the top of.10.根据权利要求3或4所述的一种麻醉用注射器，其特征在于：所述刻度二的数量为两个以上。10 . The anesthesia syringe according to claim 3 or 4 , wherein the number of the two scales is two or more. 11 .

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