阅读说明：本技术 一种基于互联网的定位式椎管内麻醉用麻醉针 (Positioning type intraspinal anesthesia needle based on internet ) 是由 喇宏玲 张丽娟 周小平 马雪萍 梅静 于 2021-08-19 设计创作，主要内容包括：本发明属于医疗器械技术领域,提供了一种基于互联网的定位式椎管内麻醉用麻醉针,包括：壳体；针筒,壳体的顶端设置有第一安装腔,针筒同轴插设第一安装腔内并与壳体滑动连接,壳体的顶部设置有第一通孔,针筒的顶端穿过第一通孔并向上延伸至壳体外；活塞,针筒上开设有注射腔,活塞滑动设置在注射腔内；推杆,推杆的底端与活塞固定连接、顶端向上延伸至针筒外；针头,针头设置在针筒的底端,壳体上设置有第二通孔,针头可穿过第二通孔延伸至壳体外；以及第一调节结构,第一调节结构设置在壳体上,其用于调节针筒的位置。本发明所提供的基于互联网的定位式椎管内麻醉用麻醉针,结构简单,便于调节针头的长度和药物的注射量。(The invention belongs to the technical field of medical instruments, and provides an internet-based positioning type intraspinal anesthesia anesthetic needle, which comprises: a housing; the top end of the shell is provided with a first mounting cavity, the needle cylinder is coaxially inserted into the first mounting cavity and is in sliding connection with the shell, the top of the shell is provided with a first through hole, and the top end of the needle cylinder penetrates through the first through hole and extends upwards to the outside of the shell; the needle cylinder is provided with an injection cavity, and the piston is arranged in the injection cavity in a sliding manner; the bottom end of the push rod is fixedly connected with the piston, and the top end of the push rod extends upwards to the outside of the syringe; the needle head is arranged at the bottom end of the needle cylinder, the shell is provided with a second through hole, and the needle head can extend out of the shell through the second through hole; and a first adjustment structure provided on the housing for adjusting the position of the syringe. The internet-based positioning type intraspinal anesthesia anesthetic needle is simple in structure and convenient for adjusting the length of a needle head and the injection amount of medicine.)

1. The utility model provides a location formula intraspinal anesthesia is with anesthesia needle based on internet which characterized in that: the method comprises the following steps:

a housing;

the top end of the shell is provided with a first mounting cavity, the needle cylinder is coaxially inserted into the first mounting cavity and is in sliding connection with the shell, the top of the shell is provided with a first through hole, and the top end of the needle cylinder penetrates through the first through hole and extends upwards to the outside of the shell;

the needle cylinder is provided with an injection cavity, and the piston is arranged in the injection cavity in a sliding manner;

the bottom end of the push rod is fixedly connected with the piston, and the top end of the push rod extends upwards to the outside of the needle cylinder;

the needle head is arranged at the bottom end of the needle cylinder, a second through hole is formed in the shell, and the needle head can extend out of the shell through the second through hole; and

a first adjustment structure disposed on the housing for adjusting a position of the syringe.

2. The internet-based positioning type anesthetic needle for intravertebral anesthesia of claim 1, wherein: the first adjustment structure includes:

the first screw rod is arranged in the first installation cavity and is in rotary connection with the shell;

the first gear is coaxially arranged in the first mounting cavity and is rotationally connected with the shell, a second gear is fixedly arranged on the first screw rod, and the first gear is meshed with the second gear;

the shell is provided with a first end face gear, the first end face gear is rotatably arranged in the first mounting cavity, and the first end face gear is fixedly connected with the first gear through a first connecting shaft;

a third gear rotatably disposed within the second mounting cavity and engaged with the first end face gear; and

the first knob is arranged on one side of the shell and is in rotary connection with the shell, and the first knob is in transmission connection with the third gear through a first transmission shaft;

the bottom end of the needle cylinder is provided with a connecting part, the first screw rod is in threaded connection with the connecting part, and first scale marks are arranged on the outer wall of the needle cylinder.

3. The internet-based positioning type anesthetic needle for intravertebral anesthesia of claim 2, wherein: the first adjustment structure further includes:

the second end face gear is coaxially sleeved on the periphery of the first end face gear and is fixedly connected with the first end face gear;

the fourth gear is rotatably arranged in the second mounting cavity and meshed with the second end face gear, and the transmission ratio of the second end face gear to the fourth gear is larger than that of the first end face gear to the third gear; and

the second knob is arranged on one side of the shell and is in rotating connection with the shell, and the second knob is in transmission connection with the fourth gear through a second transmission shaft.

4. The internet-based positioning type anesthetic needle for intravertebral anesthesia of claim 2, wherein: the number of the first screw rods is multiple, and the first screw rods are uniformly arranged around the axial lead of the first gear.

5. The internet-based positioning type anesthetic needle for intravertebral anesthesia of claim 3, wherein: the second transmission shaft is coaxially sleeved outside the first transmission shaft and is in transmission connection with the first transmission shaft.

6. The internet-based positioning type anesthetic needle for intravertebral anesthesia of any one of claims 1 to 5, wherein: a second adjustment structure for adjusting the stroke of the piston within the injection chamber;

the second adjustment structure includes:

the top of the needle cylinder is provided with a third installation cavity, and the second screw is arranged in the third installation cavity and is rotationally connected with the needle cylinder;

the fifth gear is coaxially arranged in the third mounting cavity and is rotationally connected with the needle cylinder, a sixth gear is fixedly arranged on the second screw rod, and the fifth gear is meshed with the sixth gear;

the needle cylinder is provided with a fourth installation cavity, the fourth installation cavity is positioned above the first installation cavity, the third end face gear is rotatably arranged in the fourth installation cavity, and the third end face gear is fixedly connected with the fifth gear through a second connecting shaft;

a seventh gear rotatably disposed within the fourth mounting cavity and engaged with the third end face gear;

the third knob is arranged on one side of the needle cylinder and is in rotating connection with the needle cylinder, and the third knob is in transmission connection with the seventh gear through a third transmission shaft;

the first sliding block is arranged in the third mounting cavity in a sliding mode and is in threaded connection with the second screw rod; and

the second sliding block is arranged in the injection cavity in a sliding mode and located above the piston, and the second sliding block is fixedly connected with the first sliding block through a transmission rod;

wherein, be provided with the second scale mark on the outer wall of push rod.

7. The internet-based positioning type anesthetic needle for intravertebral anesthesia of claim 6, wherein: the second adjustment structure further includes:

the fourth end face gear is coaxially sleeved on the periphery of the third end face gear and is fixedly connected with the third end face gear;

the eighth gear is rotatably arranged in the fourth mounting cavity and meshed with the fourth end face gear, and the transmission ratio of the fourth end face gear to the eighth gear is larger than that of the third end face gear to the seventh gear; and

the fourth knob is arranged on one side of the needle cylinder and is in rotating connection with the needle cylinder, and the fourth knob is in transmission connection with the eighth gear through a fourth transmission shaft.

8. The internet-based positioning type anesthetic needle for intravertebral anesthesia of claim 7, wherein: the number of the second screw rods is multiple, and the second screw rods are uniformly arranged around the axis of the fifth gear.

9. The internet-based positioning type anesthetic needle for intravertebral anesthesia of claim 8, wherein: the fourth transmission shaft is coaxially sleeved outside the third transmission shaft and is in transmission connection with the third transmission shaft.

10. The internet-based positioning type anesthetic needle for intravertebral anesthesia of claim 1, wherein: the shell is provided with a locator, and the locator is in wireless connection with the internet terminal.

Technical Field

The invention relates to the technical field of medical instruments, in particular to an internet-based positioning type intraspinal anesthesia needle.

Background

The invention patent with the publication number of CN110236351B provides a positioning type anesthesia needle for intravertebral anesthesia, wherein a threaded column is rotated to drive a second sealing plate to move so as to pump gas in a connecting groove into a pushing chamber, and a needle head is driven to move by a first sealing plate so as to achieve the purpose of changing the position of the needle head.

However, the positioning type intraspinal anesthesia anesthetic needle has the following disadvantages: when the position of the needle head is adjusted, firstly, two pull rods need to be pulled to enable the fixed rack and the limiting rack to be separated from each other so as to release the locking of the movable seat (a first sealing plate), and then the position of the needle head can be adjusted by rotating the threaded column, so that the operation is complex.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an internet-based positioning type intravertebral anesthetic needle to solve the problems in the background art.

In order to achieve the above object, the present invention provides an internet-based positioning type anesthetic needle for intravertebral anesthesia, comprising:

a housing;

the top end of the shell is provided with a first mounting cavity, the needle cylinder is coaxially inserted into the first mounting cavity and is in sliding connection with the shell, the top of the shell is provided with a first through hole, and the top end of the needle cylinder penetrates through the first through hole and extends upwards to the outside of the shell;

the needle cylinder is provided with an injection cavity, and the piston is arranged in the injection cavity in a sliding manner;

the bottom end of the push rod is fixedly connected with the piston, and the top end of the push rod extends upwards to the outside of the needle cylinder;

the needle head is arranged at the bottom end of the needle cylinder, a second through hole is formed in the shell, and the needle head can extend out of the shell through the second through hole; and

a first adjustment structure disposed on the housing for adjusting a position of the syringe.

Further, the first adjustment structure includes:

the first screw rod is arranged in the first installation cavity and is in rotary connection with the shell;

the first gear is coaxially arranged in the first mounting cavity and is rotationally connected with the shell, a second gear is fixedly arranged on the first screw rod, and the first gear is meshed with the second gear;

the shell is provided with a first end face gear, the first end face gear is rotatably arranged in the first mounting cavity, and the first end face gear is fixedly connected with the first gear through a first connecting shaft;

a third gear rotatably disposed within the second mounting cavity and engaged with the first end face gear; and

the first knob is arranged on one side of the shell and is in rotary connection with the shell, and the first knob is in transmission connection with the third gear through a first transmission shaft;

the bottom end of the needle cylinder is provided with a connecting part, the first screw rod is in threaded connection with the connecting part, and first scale marks are arranged on the outer wall of the needle cylinder.

Further, the first adjustment structure further includes:

the second end face gear is coaxially sleeved on the periphery of the first end face gear and is fixedly connected with the first end face gear;

the fourth gear is rotatably arranged in the second mounting cavity and meshed with the second end face gear, and the transmission ratio of the second end face gear to the fourth gear is larger than that of the first end face gear to the third gear; and

the second knob is arranged on one side of the shell and is in rotating connection with the shell, and the second knob is in transmission connection with the fourth gear through a second transmission shaft.

Furthermore, the number of the first screw rods is multiple, and the multiple first screw rods are uniformly arranged around the axis of the first gear.

Furthermore, the second transmission shaft is coaxially sleeved outside the first transmission shaft and is in transmission connection with the first transmission shaft.

Further, a second adjustment structure is included for adjusting the stroke of the piston within the injection chamber;

the second adjustment structure includes:

the top of the needle cylinder is provided with a third installation cavity, and the second screw is arranged in the third installation cavity and is rotationally connected with the needle cylinder;

the fifth gear is coaxially arranged in the third mounting cavity and is rotationally connected with the needle cylinder, a sixth gear is fixedly arranged on the second screw rod, and the fifth gear is meshed with the sixth gear;

the needle cylinder is provided with a fourth installation cavity, the fourth installation cavity is positioned above the first installation cavity, the third end face gear is rotatably arranged in the fourth installation cavity, and the third end face gear is fixedly connected with the fifth gear through a second connecting shaft;

a seventh gear rotatably disposed within the fourth mounting cavity and engaged with the third end face gear;

the third knob is arranged on one side of the needle cylinder and is in rotating connection with the needle cylinder, and the third knob is in transmission connection with the seventh gear through a third transmission shaft;

the first sliding block is arranged in the third mounting cavity in a sliding mode and is in threaded connection with the second screw rod; and

the second sliding block is arranged in the injection cavity in a sliding mode and located above the piston, and the second sliding block is fixedly connected with the first sliding block through a transmission rod;

wherein, be provided with the second scale mark on the outer wall of push rod.

Further, the second adjustment structure further includes:

the fourth end face gear is coaxially sleeved on the periphery of the third end face gear and is fixedly connected with the third end face gear;

the eighth gear is rotatably arranged in the fourth mounting cavity and meshed with the fourth end face gear, and the transmission ratio of the fourth end face gear to the eighth gear is larger than that of the third end face gear to the seventh gear; and

the fourth knob is arranged on one side of the needle cylinder and is in rotating connection with the needle cylinder, and the fourth knob is in transmission connection with the eighth gear through a fourth transmission shaft.

Furthermore, the number of the second screws is multiple, and the second screws are uniformly arranged around the axis of the fifth gear.

Furthermore, the fourth transmission shaft is coaxially sleeved outside the third transmission shaft and is in transmission connection with the third transmission shaft.

Furthermore, a positioner is arranged on the shell and is in wireless connection with the internet terminal.

The invention has the beneficial effects that:

the internet-based positioning type anesthesia needle for intravertebral anesthesia provided by the invention has the advantages that the position of the needle cylinder can be adjusted by rotating the first knob and the second knob, the convenience and the rapidness are realized, the adjustment efficiency and the practicability are improved, meanwhile, the stroke of the piston can be adjusted by rotating the third knob and the fourth knob, the convenience and the rapidness are realized, and the adjustment efficiency and the practicability are improved.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a perspective view of an Internet-based positioning anesthetic needle for intravertebral anesthesia according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the Internet-based positioning type intravertebral anesthetic needle shown in FIG. 1;

FIG. 3 is an enlarged view taken at A of FIG. 2;

FIG. 4 is an enlarged view at B shown in FIG. 2;

FIG. 5 is an overall perspective view of the first gear, the first face gear, the first connecting shaft and the second face gear shown in FIG. 1;

fig. 6 is an overall perspective view of the fifth gear, the third face gear, the second connecting shaft and the fourth face gear shown in fig. 1.

Reference numerals:

100-shell, 110-first installation cavity, 120-second installation cavity, 210-syringe, 211-injection cavity, 212-connecting part, 213-third installation cavity, 214-fourth installation cavity, 220-piston, 230-push rod, 240-needle, 300-first adjusting structure, 311-first screw rod, 312-second gear, 321-first gear, 322-first face gear, 323-first connecting shaft, 324-second face gear, 331-third gear, 332-first transmission shaft, 340-first knob, 351-fourth gear, 352-second transmission shaft, 360-second knob, 400-second adjusting structure, 411-second screw rod, 412-sixth gear, 421-fifth gear, 422-third face gear, 423-second connecting shaft, 424-fourth face gear, 431-seventh gear, 432-third transmission shaft, 440-third knob, 451-first slider, 452-second slider, 453-transmission rod, 461-eighth gear, 462-fourth transmission shaft, 770-fourth knob.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in figures 1-6, the invention provides an internet-based positioning type anesthetic needle for intravertebral anesthesia, which comprises a housing 100, a needle cylinder 210, a piston 220, a push rod 230, a needle 240 and a first adjusting structure 300.

Wherein the housing 100 has a cylindrical shape, preferably a cylindrical shape. The top end of the casing 100 is provided with a first mounting cavity 110, the syringe 210 is coaxially inserted into the first mounting cavity 110 and is slidably connected with the casing 100, the top of the casing 100 is provided with a first through hole, and the top end of the syringe 210 penetrates through the first through hole and extends upwards to the outside of the casing 100. The syringe 210 is provided with an injection cavity 211, and the piston 220 is slidably mounted in the injection cavity 211. Of course, the piston 220 remains sealed from the injection chamber 211. The bottom end of the push rod 230 is fixedly connected with the piston 220, and the top end extends upward to the outside of the syringe 210. In use, the plunger 220 is driven to move in the injection cavity 211 by pushing and pulling the push rod 230, so as to achieve the purposes of exhausting air in the injection cavity 211, sucking medicine into the injection cavity 211 and injecting the medicine. The needle 240 is installed at the bottom end of the syringe 210, and the housing 100 is provided with a second through hole, specifically, the second through hole is provided at the bottom end of the housing 100, and the needle 240 can extend out of the housing 100 through the second through hole.

A first adjustment mechanism 300 is mounted on the housing 100 for adjusting the position of the syringe 210. When the needle is used, the relative position of the needle cylinder 210 and the shell 100 is adjusted, so that the length of the needle 240 extending out of the shell 100 is controlled, and the purpose of controlling the puncture depth of the needle 240 is achieved.

In one embodiment, the first adjustment structure 300 includes a first screw 311, a first gear 321, a first end gear 322, a third gear 331, and a first knob 340.

Wherein, the first screw 311 is installed in the first installation cavity 110 and is rotatably connected with the housing 100. The first gear 321 is coaxially disposed in the first mounting cavity 110 and is rotatably connected to the housing 100, and the second gear 312 is fixedly disposed on the first screw 311, and preferably, the second gear 312 is integrally formed with the first screw 311. The first gear 321 meshes with the second gear 312. In use, the first gear 321 is rotated, so that the second gear 312 is driven to rotate by the first gear 321, and the first screw 311 is driven to rotate.

The housing 100 is provided with a second mounting cavity 120, the second mounting cavity 120 is located below the first mounting cavity 110, the first face gear 322 is rotatably disposed in the second mounting cavity 120, and the first face gear 322 is fixedly connected to the first gear 321 through the first connecting shaft 323. Preferably, the first face gear 322, the first connecting shaft 323, and the first gear 321 are integrally formed. The third gear 331 is rotatably disposed in the second mounting cavity 120 and is engaged with the first end face gear 322. The first knob 340 is installed at one side of the housing 100 and is rotatably connected with the housing 100, and the first knob 340 is in transmission connection with the third gear 331 through the first transmission shaft 332. Wherein, the bottom of the syringe 210 is provided with a connecting part 212, and the first screw 311 is in threaded connection with the connecting part 201. And the outer wall of the needle cylinder is provided with a first scale mark. In use, the position of the needle 240 is easily confirmed by the first graduation marks.

During use, by rotating the first knob 340, the first knob 340 drives the third gear 331 to rotate, the third gear 331 drives the first end face gear 322 to rotate, the first end face gear 322 drives the first gear 321 to rotate, the first gear 321 drives the second gear 312 to rotate, the second gear 312 drives the first screw 311 to rotate, and the first screw 311 drives the syringe 210 to move upwards or downwards so as to adjust the position of the syringe 210, thereby achieving the purpose of controlling the length of the needle 240 extending out of the shell 100.

Of course, a third through hole corresponding to the second through hole is formed in order to allow the needle 240 to pass through the first gear 321, the first face gear 322, and the first connecting shaft 323.

The first adjusting structure 300 of the structure is simple in structure, reasonable in design, convenient to operate and adjust.

In one embodiment, the first adjustment structure 300 further includes a second end face gear 324, a fourth gear 351, and a second knob 360.

The second face gear 324 is coaxially sleeved on the periphery of the first face gear 322 and is fixedly connected with the first face gear 322. Preferably, second face gear 324 is integrally formed with first face gear 322. The fourth gear 351 is rotatably disposed in the second mounting cavity 120 and is engaged with the second face gear 324. And the transmission ratio of the second end face gear 324 to the fourth gear 351 is greater than that of the first end face gear 322 to the third gear 331. Specifically, let the number of teeth of the second face gear 324 be a; the number of teeth of the fourth gear 351 is b; the number of teeth of the first face gear 322 is c; the number of teeth of the third gear 331 is d; wherein a: b > c: d.

In other words, the distance moved by one rotation of the second knob 360 by the needle cartridge 210 is smaller than the distance moved by one rotation of the first knob 340 by the needle cartridge 210.

The second knob 360 is disposed at one side of the housing 100 and is rotatably connected to the housing 100, and the second knob 360 is drivingly connected to the fourth gear 351 through the second transmission shaft 352.

When in use, the position of the syringe 210 can be roughly adjusted by rotating the first knob 340, and then the position of the syringe 210 can be finely adjusted by rotating the second knob 360, so as to achieve the purpose of accurately adjusting the position of the syringe 210.

This structure allows more accurate adjustment of the position of the syringe 210.

In one embodiment, the number of the first screws 311 is plural, and the plural first screws 311 are uniformly arranged around the axial line of the first gear 321. In other words, the second gear 312 is plural in number and meshed with the first gear 321 in a planetary gear manner. When the device is used, the position of the needle cylinder 210 can be adjusted by simultaneously rotating the plurality of first screw rods 311, so that the movement of the needle cylinder 210 is limited and guided.

In one embodiment, the second transmission shaft 352 coaxially fits over the first transmission shaft 332 and is drivingly connected to the first transmission shaft 332. Specifically, the third gear 331 is located inside the fourth gear 351, a fourth through hole is formed in the second transmission shaft 352, the first transmission shaft 332 passes through the fourth through hole and then is connected with the first knob 340, and the second knob 360 is sleeved on the periphery of the first knob 340. This makes the first adjustment structure 300 more compact.

In one embodiment, a second adjustment structure 400 is also included, the second adjustment structure 400 being used to adjust the travel of the piston 220 within the injection cavity 211. In use, the stroke of the piston 220 in the injection cavity 211 is adjusted by the second adjustment structure 400, thereby effectively controlling the injection amount of the medicine.

The second adjustment structure 400 includes a second screw 411, a fifth gear 421, a third end gear 422, a seventh gear 431, a third knob 440, a first slider 451, and a second slider 452.

Wherein, the top of the syringe 210 is opened with a third mounting cavity 213, and the second screw 411 is mounted in the third mounting cavity 213 and is rotatably connected with the syringe 210. A fifth gear 421 is coaxially disposed within the third mounting chamber 213 and is rotatably connected to the cylinder 210. A sixth gear 412 is fixedly disposed on the second screw 411, and preferably, the sixth gear 412 is integrally formed with the second screw 411. The fifth gear 421 meshes with the sixth gear 412.

A fourth mounting cavity 214 is formed in the needle cylinder 210, the fourth mounting cavity 214 is located above the first mounting cavity 110, the third end face gear 422 is rotatably arranged in the fourth mounting cavity 214, and the third end face gear 422 is fixedly connected with the fifth gear 421 through a second connecting shaft 423. Preferably, the third face gear 422, the fifth gear 421 and the second connecting shaft 423 are integrally formed. Of course, the third face gear 422, the fifth gear 421 and the second connecting shaft 423 are provided with sixth through holes for the push rod 230 to pass through.

A seventh gear 431 is rotatably disposed within fourth mounting cavity 214 and is in meshing engagement with third end gear 422. The third knob 440 is disposed at one side of the syringe 210 and is rotatably connected to the syringe 210, and the third knob 440 is drivingly connected to the seventh gear 431 via the third transmission shaft 432. The first slider 451 is slidably disposed in the third mounting cavity 213 and is threadedly coupled to the second screw 411. The second slide block 452 is slidably disposed in the injection cavity 211 above the piston 220, and the second slide block 452 is fixedly connected to the first slide block 451 through a transmission rod 453. Preferably, the first slider 451, the second slider 452 and the transmission lever 453 are integrally formed. Of course, the first slider 451, the second slider 452, and the transmission rod 453 have a fifth through hole through which the push rod 230 passes.

When the injection device is used, the third knob 440 is rotated, the third knob 440 drives the seventh gear 431 to rotate, the seventh gear 431 drives the third end face gear 422 to rotate, the third end face gear 422 drives the fifth gear 421 to rotate, the fifth gear 421 drives the sixth gear 412 to rotate, the sixth gear 412 drives the second screw 411 to rotate, the second screw 411 drives the first slider 451 to move upwards or downwards, the first slider 451 drives the second slider 452 to move upwards or downwards through the transmission rod 453, so that the position of the second slider 452 in the injection cavity 211 is changed to achieve the purpose of controlling the stroke of the piston 220, and the purpose of controlling the amount of the injected medicine is achieved.

The second adjusting structure 400 of the structure has the advantages of simple structure, reasonable design, convenient operation and convenient adjustment.

In one embodiment, the second adjustment mechanism 400 further includes a fourth end gear 424, an eighth gear 461, and a fourth knob 770.

The fourth face gear 424 is coaxially sleeved on the periphery of the third face gear 422 and is fixedly connected with the third face gear 422. Preferably, the third face gear 422 is integrally formed with the fourth face gear 424.

The eighth gear 461 is rotatably disposed in the fourth mounting cavity 214 and meshed with the fourth face gear 424, and the transmission ratio of the fourth face gear 424 to the eighth gear 461 is greater than that of the third face gear 422 to the seventh gear 431. Specifically, let e be the number of teeth of the fourth face gear 424; the number of teeth of the eighth gear 461 is f; the number of teeth of the third face gear 422 is g; the number of teeth of the seventh gear 431 is h; wherein e: f > g: h.

In other words, the distance moved by one rotation of the fourth knob 770 by the second slider 452 is smaller than the distance moved by one rotation of the third knob 440 by the second slider 452.

The fourth knob 770 is disposed at one side of the cylinder 210 and is rotatably connected with the cylinder 210, and the fourth knob 770 is drivingly connected with the eighth gear 461 through a fourth transmission shaft 462.

When the device is used, the position of the second slider 452 can be roughly adjusted by rotating the third knob 440, and then the position of the second slider 452 can be finely adjusted by rotating the fourth knob 770, so that the purpose of accurately adjusting the position of the second slider 452 is achieved, and the purpose of accurately controlling the injection amount of the medicine is achieved.

The structure can more accurately adjust the position of the second slider 452, thereby achieving the purpose of precise injection.

In one embodiment, the number of the second screws 411 is plural, and the plural second screws 411 are uniformly arranged around the axis line of the fifth gear 421. In other words, the number of the sixth gears 412 is plural and is meshed with the fifth gear 421 in a planetary gear manner. When the adjusting device is used, the position of the second sliding block 452 can be adjusted by simultaneously rotating the plurality of second screws 411, so that the movement of the second sliding block 452 is limited and guided.

In one embodiment, the fourth transmission shaft 462 is coaxially sleeved outside the third transmission shaft 432 and is in transmission connection with the third transmission shaft 432. Specifically, the seventh gear 431 is located inside the eighth gear 461, the fourth transmission shaft 462 is provided with a fifth through hole, the third transmission shaft 432 passes through the fifth through hole and then is connected with the third knob 440, and the fourth knob 770 is sleeved on the periphery of the third knob 440. This makes the second adjustment structure 400 more compact.

In one embodiment, the housing 100 is mounted with a locator that is wirelessly connected to an external internet terminal device. Therefore, when the anesthesia needle is lost, the anesthesia needle can be quickly found through the positioner.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.