CN113041457A

CN113041457A - Syringe

Info

Publication number: CN113041457A
Application number: CN202110207552.XA
Authority: CN
Inventors: 黎智敏; 陈伟良
Original assignee: Guangdong Simin Medical Device Technology Co ltd
Current assignee: Guangdong Simin Medical Device Technology Co ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2021-06-29

Abstract

The invention creatively discloses an injector, which comprises: a needle cylinder, the lower end of which is provided with an injection port; the piston rod is movably arranged in the needle cylinder, the piston rod can rotate in the needle cylinder, the piston rod is provided with at least two sliding rack parts, and the tooth pitches of the different sliding rack parts are different; there is level injection module, it includes shell and shell fragment, the upper end at the cylinder is installed to the shell, the piston rod run through from top to bottom in the shell, the shell fragment is installed in the shell, arbitrary one slide rack portion's rotation route all intersect in the face is dodged to all teeth of every slide rack portion all is equipped with from up down the lower of leaning out for every slides rack portion homoenergetic from last down removal can order about the shell fragment carries out elasticity and dodges. Compared with the prior art, the invention can quantify different injection speeds by the matching use of the elastic sheet and the sliding rack part with different tooth pitches so as to adapt to the injection of different liquid medicines.

Description

Syringe

Technical Field

The invention relates to the technical field of medical instruments, in particular to an injector.

Background

In the medical industry, injection is one of the conventional therapeutic methods, and a medical solution is injected under the skin through an injection needle, so as to obtain a corresponding therapeutic effect. The pain feeling generated during the injection of part of the liquid medicine is obvious, so the slow injection is needed, but the injection speed of the liquid medicine is mainly controlled by the subjective experience of a therapist at present, and the quantifiable objective condition is lacked.

Disclosure of Invention

The present invention is directed to a syringe that solves one or more of the problems set forth in the prior art, and provides at least one useful alternative or creation.

An injector according to an embodiment of the first aspect of the invention comprises:

a needle cylinder, the lower end of which is provided with an injection port;

the piston rod is movably arranged in the needle cylinder, the piston rod can rotate in the needle cylinder, the piston rod is provided with at least two sliding rack parts, and the tooth pitches of the different sliding rack parts are different;

there is level injection module, it includes shell and shell fragment, the upper end at the cylinder is installed to the shell, the piston rod run through from top to bottom in the shell, the shell fragment is installed in the shell, arbitrary one slide rack portion's rotation route all intersect in the face is dodged to all teeth of every slide rack portion all is equipped with from up down the lower of leaning out for every slides rack portion homoenergetic from last down removal can order about the shell fragment carries out elasticity and dodges. The action that the piston rod moves downwards in the needle cylinder filled with the liquid medicine is called injection, and in the injection process, as the lower avoidance surface can drive the elastic sheet to elastically avoid, under the action of the elastic force of the elastic sheet, certain feedback can be generated after the elastic sheet avoids one tooth of the sliding rack part, so that the purpose of graded injection is achieved.

The injector according to the embodiment of the invention has at least the following advantages: the invention creates the step injection under the matching use of the sliding rack part and the elastic sheet, and the injection amount of each step injection is determined according to the tooth pitch of the sliding rack part at present, when the liquid medicine with obvious pain feeling needs to be injected, the sliding rack part with shorter tooth pitch can be rotated to be matched with the elastic sheet for use, so as to reduce the injection amount of each step injection, thereby slowing down the injection speed. Compared with the prior art, the invention can quantify different injection speeds by the matching use of the elastic sheet and the sliding rack part with different tooth pitches so as to adapt to the injection of different liquid medicines.

According to some embodiments of the invention, for the purpose of quantitative injection, the piston rod is provided with at least two sliding scales, the number of the sliding scales is the same as that of the sliding rack parts, the sliding scales and the sliding rack parts are arranged in one-to-one correspondence, and the division value of each sliding scale corresponds to the tooth pitch of the corresponding sliding rack part.

According to some embodiments of the present invention, the relative position relationship between each sliding scale and the corresponding sliding rack portion is consistent, so that the position relationship between the sliding rack portion and the sliding scale is well distributed, and thus all the sliding scales can be observed in a concentrated manner.

According to some embodiments of the invention, for convenience of use, all the sliding rack portions are uniformly distributed circumferentially around the rotation axis of the piston rod, and one sliding scale is arranged between every two adjacent sliding rack portions.

According to some embodiments of the invention, the number of the sliding rack portion is three, i.e. the invention provides three different injection speed steps.

According to some embodiments of the invention, the housing is provided with an observation hole for observing the sliding scale, and the housing is provided with a pointer mark beside the observation hole. The number of the observation holes is only one, and in order to enable the observation holes to observe all the sliding scales, the relative position relationship between the observation holes and the elastic sheet is consistent with the relative position relationship between any one sliding scale and the corresponding sliding rack part.

According to some embodiments of the invention, a clutch is movably connected in the housing, and the clutch is used for adjusting the position of the spring plate. The shell fragment has the injection station and gets the liquid station through the drive of clutch spare, works as when the shell fragment is in the injection station, the shell fragment joint is in arbitrary one from up the rack portion that slides of removing down, the shell fragment dodges in arbitrary one from the rack portion that slides of down removing from last, works as when the shell fragment is in and gets the liquid station, shell fragment and all the separation of rack portion that slides.

According to some embodiments of the invention, in order to facilitate control of the clutch, the clutch is provided with a handle extending outside the housing.

According to some embodiments of the present invention, in order to facilitate the installation and connection of the stepped injection module and the syringe, the housing is divided into a first housing and a second housing, and the first housing and the second housing are detachably connected.

According to some embodiments of the invention, the upper end of the piston rod is provided with a piston handle, the piston handle is positioned above the shell, the size of the piston handle is larger than that of the piston rod, and a therapist can control the position of the piston rod through the piston handle; the lower end of the piston rod is rotationally connected with a rubber plug which is used for sealing and pushing the liquid medicine in the needle cylinder.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic perspective view of a syringe according to an embodiment of the present invention;

FIG. 2 is an exploded view of the syringe shown in FIG. 1;

FIG. 3 is a perspective view of the syringe of FIG. 1 with the second housing removed;

FIG. 4 is a schematic perspective view of the plunger of FIG. 3 with the plunger in the dispensing position;

FIG. 5 is a front view of the syringe shown in FIG. 4;

FIG. 6 is a schematic perspective view of the spring plate of the injector shown in FIG. 3 at an injection station;

FIG. 7 is a front view of the syringe shown in FIG. 6;

fig. 8 is a front view of the injector of fig. 6 after switching to another injection speed gear.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating the invention and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as up, down, front, rear, left, right, etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of the description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the invention, the meaning of a plurality of the terms is one or more, the meaning of a plurality of the terms is two or more, and the terms larger, smaller, larger, etc. are understood to include no essential numbers, and the terms larger, smaller, etc. are understood to include essential numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly defined, terms such as setup, installation, connection, and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the terms in the present invention in combination with the detailed contents of the technical solutions.

As shown in fig. 1 to 3, an injector according to an embodiment of the first aspect of the present invention includes a syringe 100, a piston rod 200 and a stepped injection module 300, wherein the syringe 100 is made of a transparent material, such as polypropylene, and has a barrel ear 110 and an injection port 120 at upper and lower ends thereof, respectively, the injection port 120 is used for connecting a needle, and a volume scale is provided on an outer circumferential surface of the syringe 100 so as to know a volume of a liquid medicine in the syringe 100; piston rod 200 activity sets up in the cylinder 100, the lower extreme of piston rod 200 rotates and is connected with the rubber buffer 210 that is used for sealed liquid medicine in advancing cylinder 100, and the upper end of piston rod 200 is equipped with piston handle 220, and the size of a dimension of piston handle 220 is greater than the size of a dimension of piston rod 200, piston rod 200 not only can drive rubber buffer 210 reciprocates in cylinder 100, can also carry out the rotation in cylinder 100, and the axis of rotation of piston rod 200 is located the center axis of cylinder 100.

As shown in fig. 2, the piston rod 200 is provided with three sliding rack portions 230, all the sliding rack portions 230 are circumferentially and uniformly distributed around the rotation axis of the piston rod 200, the lower bottom surfaces of all the teeth on each sliding rack portion 230 are inclined outwards from bottom to top to form a lower avoidance surface 231, the upper top surfaces of all the teeth on each sliding rack portion 230 are horizontally arranged to form an upper clamping surface 232, each sliding rack portion 230 has a uniform pitch, but the pitches of different sliding rack portions 230 are different, three sliding rack portions 230 are sequentially arranged from short to long according to the length of the pitch, and different pitches correspond to different injection speed gears. It is understood that the number of the sliding rack portion 230 may also be two, four, etc., as long as the number is greater than or equal to two, which is within the protection scope of the present invention. In other embodiments, the sliding rack portion 230 may be extended in a circumferential direction to form a snap groove set, which provides a similar technical effect as the sliding rack portion 230.

As shown in fig. 2 and 3, the staged injection module 300 includes a housing 310 and a resilient piece 320, the housing 310 is divided into a first housing 301 and a second housing 302, the first housing 301 and the second housing 302 are both provided with a receiving slot 303 for receiving the barrel ear 110, at this time, the housing 310 can replace the barrel ear 110, so that the staged injection module 300 can be installed at the barrel ear 110 of the syringe 100, and in order to facilitate the installation and connection of the staged injection module 300 and the syringe 100, the first housing 301 and the second housing 302 can be detachably connected. The housing 310 is provided with a through hole for the piston rod 200 to pass through, so that the piston rod 200 can vertically penetrate through the housing 310, and the piston handle 220 of the piston rod 200 is located above the housing 310. The elastic sheet 320 is close to the piston rod 200 and is arranged above the needle cylinder 100, one end of the elastic sheet 320 is fixedly connected to the inside of the shell 310, the other end of the elastic sheet 320 is an overhead end 321, the overhead end 321 can be abutted against any sliding rack part 230, namely, the rotating path of any sliding rack part 230 is intersected with the overhead end 321, the overhead end 321 is located on the up-and-down moving path corresponding to the sliding rack part 230, each sliding rack part 230 moving downwards from top to bottom can drive the overhead end 321 to perform elastic avoidance under the action of the lower avoidance surface 231, and under the elastic action of the elastic sheet 320, a certain feedback can be generated after each tooth of the sliding rack part 230 is avoided by the elastic sheet 320 so as to achieve the purpose of stepped injection. The invention creates the step injection under the matching use of the sliding rack part 230 and the spring plate 320, and the injection amount of each step injection is determined according to the tooth pitch of the current sliding rack part 230, when the liquid medicine with obvious pain feeling needs to be injected, the arrangement of figure 7 can be changed into the arrangement of figure 8, namely, the sliding rack part 230 with shorter tooth pitch is rotated to be matched with the spring plate 320 for use, and the injector is in a low-speed injection gear at the moment so as to reduce the injection amount of each step injection, thereby slowing down the injection speed.

As shown in fig. 2 and 3, in order to enable the present invention to smoothly extract a liquid medicine without causing a jam, a clutch 330 is disposed in the housing 310, the clutch 330 is eccentrically and rotatably connected to the housing 310, the clutch 330 abuts against the overhead end 321 of the spring plate 320, and after the clutch 330 is eccentrically and rotatably moved, the position of the overhead end 321 is changed, so that the spring plate 320 has an injection station and a liquid extraction station. When the elastic sheet 320 is at the liquid taking station, the elastic sheet 320 is separated from all the sliding rack parts 230, so that the liquid medicine can be smoothly extracted. In other embodiments, the clutch 330 can be slidably connected to the housing 310, and the clutch 330 can change the position of the free end 321 of the spring 320 by sliding.

In order to conveniently control the position of the clutch member 330, the clutch member 330 is provided with a handle 331, the handle 331 extends out of the housing 310, and the therapist can control the position of the clutch member 330 through the handle 331 so as to switch the two work positions of the spring plate 320. In addition, when the clutch member 330 adjusts the relative position between the clutch member 330 and the resilient plate 320, in order to avoid the resilient plate 320 from being empty, the handle 331 is provided with an empty-avoiding groove 332 through which the resilient plate 320 can pass, so as to prevent the clutch member 330 from interfering with the resilient plate 320.

As shown in fig. 4 and 5, after the handle 331 of the clutch 330 is rotated upward, the overhead end 321 of the elastic sheet 320 is externally disposed on the moving path of the sliding rack portion 230, at this time, the elastic sheet 320 is located at the liquid-taking station, and the piston rod 200 is not restricted from moving upward or downward in the syringe 100, so that liquid taking of the syringe can be realized; as shown in fig. 6 and 7, after the handle 331 of the clutch 330 is rotated downward, the overhead end 321 of the resilient plate 320 is disposed on the moving path of the sliding rack portion 230, and at this time, the resilient plate 320 is located at the injection station, because all teeth of each sliding rack portion 230 are provided with the lower escape surface 231, and all teeth of each sliding rack portion 230 are provided with the upper engaging surface 232, when the piston rod 200 moves upward, under the action of the upper engaging surface 232, the resilient plate 320 can be engaged with the sliding rack portion 230 moving upward from below, so that the upward movement of the piston rod 200 in the syringe 100 is blocked, and when the piston rod 200 moves downward, under the action of the lower escape surface 231, the resilient plate 320 can escape from the sliding rack portion 230 moving downward from above, so that the downward movement of the piston rod 200 in the syringe 100 is not restricted, the injection of the injector can be realized. In addition, when the piston rod 200 needs to be rotated, since the rotation of the other sliding rack portions 230 may interfere with the elastic sheet 320, the elastic sheet 320 may be adjusted to be at the liquid taking station, and then the other sliding rack portions 230 may be rotated to the elastic sheet 320.

As shown in fig. 1 and 2, in some embodiments of the present invention, for the purpose of quantitative injection, a sliding scale 240 is disposed between every two adjacent sliding rack portions 230, at this time, the number of the sliding scales 240 is the same as the number of the sliding rack portions 230, the sliding scales 240 are disposed in one-to-one correspondence with the sliding rack portions 230, the division value of each sliding scale 240 corresponds to the tooth pitch of the corresponding sliding rack portion 230, and the relative position relationship between each sliding scale 240 and the corresponding sliding rack portion 230 is the same, that is, the position included angle between each sliding scale 240 and the corresponding sliding rack portion 230 is the same, so as to distribute the position relationship between the sliding rack portion 230 and the sliding scale 240, so as to intensively observe all the sliding scales 240. Meanwhile, the housing 310 is provided with an observation hole 311 for observing the sliding scales 240, the housing 310 is provided with a pointer mark 312 beside the observation hole 311, the number of the observation holes 311 is only one, and in order to enable the observation hole 311 to observe all the sliding scales 240, the relative position relationship between the observation hole 311 and the spring plate 320 is consistent with the relative position relationship between any one sliding scale 240 and the corresponding sliding rack portion 230, so that when any one sliding rack portion 230 rotates to be matched with the spring plate 320, the sliding scale 240 corresponding to the sliding rack portion 230 can be observed from the observation hole 311, so that quantitative injection can be performed. The slide scale 240 is provided not on a volume basis but on the basis of the number of teeth in the slide rack portion 230, for example, the number of teeth in one slide rack portion 230 is sixty, the number of index values of the slide scale 240 corresponding to the slide rack portion 230 is sixty, and if the index value of the drug solution in the syringe 100 is sixty and one needle of the drug solution needs to be injected three times in a time, the injection amount per time is twenty index values.

It is further noted that, for hygienic safety, the syringe of the present invention is a disposable syringe, and repeated use is strictly prohibited.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A syringe, comprising:

a needle cylinder, the lower end of which is provided with an injection port;

there is level injection module, it includes shell and shell fragment, the upper end at the cylinder is installed to the shell, the piston rod run through from top to bottom in the shell, the shell fragment is installed in the shell, arbitrary one slide rack portion's rotation route all intersect in the face is dodged to all teeth of every slide rack portion all is equipped with from up down the lower of leaning out for every slides rack portion homoenergetic from last down removal can order about the shell fragment carries out elasticity and dodges.

2. A syringe according to claim 1, wherein: the piston rod is provided with at least two sliding scales, the number of the sliding scales is consistent with that of the sliding rack parts, the sliding scales and the sliding rack parts are arranged in a one-to-one correspondence mode, and the division value of each sliding scale corresponds to the tooth pitch of the corresponding sliding rack part.

3. A syringe according to claim 2, wherein: the relative position relation between each sliding scale and the corresponding sliding rack part is consistent.

4. A syringe according to claim 3, wherein: all the sliding rack parts are uniformly distributed in the circumferential direction around the rotating axis of the piston rod, and one sliding scale is arranged between every two adjacent sliding rack parts.

5. A syringe according to claim 4, wherein: the number of the sliding rack parts is three.

6. A syringe according to claim 3, wherein: the shell is provided with an observation hole for observing the sliding scale, and a pointer mark is arranged beside the observation hole.

7. A syringe according to claim 1, wherein: the shell is movably connected with a clutch piece, and the clutch piece is used for adjusting the position of the elastic sheet.

8. A syringe according to claim 7, wherein: the clutch member is provided with a handle which extends outside the housing.

9. A syringe according to claim 1, wherein: the shell is divided into a first shell and a second shell, and the first shell is detachably connected with the second shell.

10. A syringe according to claim 1, wherein: the upper end of the piston rod is provided with a piston handle which is positioned above the shell; the lower end of the piston rod is rotatably connected with a rubber plug.