WO2018202024A1

WO2018202024A1 - Medical syringe

Info

Publication number: WO2018202024A1
Application number: PCT/CN2018/085205
Authority: WO
Inventors: 张洪杰; 王兴国
Original assignee: 贝普医疗科技有限公司
Priority date: 2017-05-03
Filing date: 2018-04-28
Publication date: 2018-11-08
Also published as: CN107050573A

Abstract

A medical syringe, comprising: a needle holder (2), an engagement mount (3), a safety sleeve (5) and a needle (6). The engagement mount (3) is internally provided with a receiving cavity (30). The needle holder (2) and the safety sleeve (5) are respectively provided at an upper portion and a lower portion of the receiving cavity (30) of the engagement mount (3). The needle (6) is provided inside the needle holder (2) and extends downward into the safety sleeve (5). The safety sleeve (5) can move up and down inside the receiving cavity (30) of the engagement mount (3) in cooperation with an injecting operation of the needle (6). The engagement mount (3) is provided with a guide slot (31) extending upward and downward. The guide slot (31) is internally provided with an elastic guide plate (33) dividing a lower portion of the guide slot (31) into a left guide slot (311) and a right guide slot (312). A bottom surface (314) of the right guide slot (312) is higher than a bottom surface (313) of the left guide slot (311). The safety sleeve (5) is provided with a fixing pin (52).

Description

Medical syringe

Technical field

The present invention relates to a syringe, in particular a medical injector, which can be used for the injection of insulin, but is not limited thereto.

Background technique

It is known that a common medical syringe is generally composed of a tube portion and a needle tube which is provided at the front portion of the tube portion for piercing an injection portion for storing a liquid medicine to be injected. After the injection is completed, the needle tube is removed from the front portion of the tube portion, and after being sterilized, it is reused.

In some medical syringes, the needle tube is directly placed on the tube portion, and after use, it will be destroyed to avoid subsequent repeated use and medical hazards. For example, conventional insulin syringes and pen insulin syringes are currently in common use.

However, for the insulin syringe currently used in the industry, after its use, due to its structural design, the tip of the needle end of the needle tube is always exposed to the outside, and there is a clear safety hazard, and the safety problem is undoubtedly exposed.

Further, the design flaw of the insulin syringe itself is not only manifested in the appearance of the needle tip of the needle after the use is completed, but also has a greater safety hazard. That is to say, after it is used, it can be recycled and reused without destroying its own structure, thus laying a more serious safety hazard.

Therefore, it is indeed necessary to develop a new type of medical injector to overcome the drawbacks of the prior art.

Summary of the invention

It is an object of the present invention to provide a medical syringe which can effectively shield the end of the needle tube after the injection is completed, thereby avoiding the safety problem caused by the end of the needle tube after the injection is completed.

In order to achieve the above object, the technical solution adopted by the present invention is as follows:

A medical injector includes a needle holder, a card holder, a safety cover and a needle tube. Wherein the card holder is provided with a receiving cavity, the needle seat and the safety protective sleeve are respectively disposed at an upper portion and a lower portion of the card holder receiving cavity, and the needle tube is disposed in the needle seat and extends downwardly The safety cover. The safety cover can be moved up and down within the cartridge receiving cavity to cooperate with the injection operation of the needle. The card holder is provided with a guiding groove extending upwardly and downwardly, and the guiding groove is provided with a guiding elastic piece, and the lower part of the guiding groove is divided into two parts of a left guiding groove and a right guiding groove. The bottom surface of the right guide groove is higher than the bottom surface of the left guide groove, and the safety cover is provided with a fixing pin. Wherein when the fixing pin is disposed in the right guiding groove and is limited by the bottom surface thereof, the safety protection sleeve is located at an initial position with respect to the card seat; and the safety protection sleeve is at the card seat The upward movement in the receiving cavity enables the fixing pin to enter the upper portion of the guiding groove from the right guiding groove upward through the blocking of the guiding elastic piece, and the safety protective cover is located relative to the card seat work location.

Further, in different embodiments, the downward movement of the safety protective cover in the receiving cavity causes the fixing pin located at the upper portion of the guiding groove to enter under the guidance of the guiding elastic piece The left guide groove.

Further, in different embodiments, the guiding elastic piece extends obliquely upward in the guiding groove to at least partially block the upper opening of the right guiding groove.

Further, in different embodiments, the left guiding channel is further provided with an elastic barb which extends downward in the left guiding channel.

Further, in various embodiments, the elastic barb extends obliquely downward in the left channel and at least partially shields the upper and lower communication of the left channel. Alternatively, the end of the elastic barb is provided with a downwardly inclined guiding bevel to at least partially shield the upper and lower communication of the left guiding channel.

Further, in different embodiments, wherein the bottom surface of the left guiding channel is disposed such that the fixing pin is in this position, the safety protective cover can completely shield the end needle tip of the needle tube.

Further, in different embodiments, an elastic member is disposed between the hub and the safety cover. For example, springs, but are not limited to.

Further, in various embodiments, the device further includes a needle guard sleeve that is sleeved outside the card holder.

Compared with the prior art, the present invention has the beneficial effects that the present invention relates to a medical syringe which adopts a newly designed safety protective cover structure and a card seat structure matched thereto, so that the syringe is finished after the injection. The safety cover can extend out of the card seat and completely shield the end of the needle tube, thereby avoiding the safety problem that may be caused by the tip end of the needle tube being exposed after use.

Further, the manner of matching between the safety cover and the card seat also enables the safety protection cover to retract to the chassis without protruding its structure after extending the card holder. In the card holder, the medical injector can only be destroyed after being used, and can not be simply recycled and reused, thereby effectively avoiding medical accidents that may be caused by repeated recycling by incorrect recycling. .

DRAWINGS

1 is a schematic structural view of a medical injector according to an embodiment of the present invention;

2 is a schematic view of the medical syringe of FIG. 1 with a mating structure between the safety cover and the card holder, wherein the safety cover is in an unused initial position;

3 is a schematic view showing the mating structure of the medical syringe of FIG. 1 between the safety cover and the card holder, wherein the safety cover is in a working position in a state of being used;

Figure 4 is a schematic view showing the mating structure of the medical syringe and the card holder of the medical injector shown in Figure 1, wherein the safety protective sleeve is in a working position after completion of use;

Figure 5 is a schematic view showing the matching structure between the safety protective cover and the card holder of the medical injector shown in Figure 1, wherein the safety protective cover is in another working position after completion of use;

Figure 6 is a schematic view showing the mating structure between the safety protective cover and the card holder of the medical injector shown in Figure 1, wherein the safety protective cover is in a final position after completion of use;

FIG. 7 is a schematic view showing the mating structure between the safety protective cover and the card holder of the medical injector shown in FIG. 1. FIG.

The reference numerals in Figures 1 to 7 are as follows:

Needle seat cover 1 needle seat 2

Card holder 3 spring 4

Safety cover 5 needle tube 6

Containment cavity 30 guide groove 31

Left channel 311 right channel 312

Bottom of the left guide groove 313 Bottom of the right guide groove 314

Guide shrapnel 33 elastic barb 35

Guide bevel 351 fixing pin 52

detailed description

The technical solution of a medical injector according to the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1 , an embodiment of the present invention provides a medical injector including a needle guard cover 1 , a needle holder 2 , a card holder 3 , a spring 4 , a safety cover 5 , and a needle tube 6 .

The card holder 3 is provided with a receiving cavity 30. The needle holder 2 is disposed at an upper portion of the receiving cavity 30 of the card holder 3. The safety protective cover 5 is disposed at a lower portion of the receiving cavity 30 of the card holder 3. And partially exposed outside the card holder 3. The spring 4 is disposed between the hub 2 and the safety guard 5. The needle tube 6 is disposed in the needle hub 2 and extends downwardly through the safety protective sleeve 5 with its end needle tip exposed outside the safety protective sleeve 5. The needle guard cover 1 is sleeved on the outside of the card holder 3, and at the same time, the needle tube 2 is also completely shielded therein.

Further, please refer to FIG. 2 , wherein the card holder 3 is provided with a vertically extending guiding slot 31 , and the guiding slot 31 is provided with a guiding elastic piece 33 , and a part of the guiding slot 31 is bounded by the guiding slot 31 . The lower portion is divided into two parts, a left guide groove 311 and a right guide groove 312, wherein the bottom surface 314 of the right guide groove 312 is higher than the bottom surface 313 of the left guide groove 311. Moreover, the guide elastic piece 33 is disposed obliquely upward in the guide groove 31 to partially cover the upper opening of the right guide groove 312. Of course, since the guiding elastic piece 33 has a certain elasticity, in different embodiments, it may also be an upper opening that completely covers the right guiding groove 312, but is not limited thereto.

An elastic barb 35 is further disposed in the left guide groove 311, and extends downward in the left guide groove 311, and the left guide groove 311 is substantially divided into two portions. The elastic barbs 35 may also be arranged obliquely downward or, as shown in the figure, a tilting downward guiding inclined surface 351 is provided, but is not limited thereto.

The safety cover 5 is provided with a fixing pin 52, which is initially received in the right guiding groove 312 and is limited by the bottom surface 314 thereof, thereby realizing the safety cover 5 relative to the card holder 3. Limit. At this time, the safety protective cover 5 of the medical injector is in an initial position in an unused state, and the needle tip of the end of the needle tube 6 is shielded by the needle guard cover 1 to prevent its exposure.

In use, the needle guard 1 is removed such that the needle tip of the needle 6 penetrates into the skin at a predetermined location. When the needle tip of the needle tube 6 is pressed down to perform the injection, the safety protective sleeve 5 will move upward under the reverse force of the skin, and will also compress the spring 4 to compress. At this time, the fixing pin 52 of the safety cover 5 is upward along the right guiding groove 312, and when the guiding elastic piece 33 is passed, an upward force is applied thereto, so that the guiding elastic piece 33 bounces to the outside. Thereby, the space is made to pass the fixing pin 52 into the upper portion of the guide groove 31, and when the fixing pin 52 passes, the guide elastic piece 33 returns to the original position. At this time, the safety protective cover 5 of the medical injector is in the working position in the use state, as shown in FIG. 3 for specific illustration.

After the injection is completed, the needle tube 6 is pulled out from the skin, at which time the external force received by the safety protective sleeve 5 is removed, and the movement of the spring 4 is under the action of the compressive restoring force of the spring 4, at which time the safety protective sleeve The fixing pin 52 of 5 moves downward along the guide groove 31. During the movement, the guiding elastic piece 33 is encountered, due to the inclined setting of the guiding elastic piece 33 and the shielding of the opening on the right guiding groove 312, so that it guides the fixing pin 52 to the left side. The guide groove 311 instead of entering the right guide groove 312 downward, as shown in FIG. 4 for specific illustration.

After the fixing pin 52 enters the left guiding slot 311, as shown in FIG. 5, the fixing pin 52 encounters the elastic barb 35 during the downward sliding process, in the spring Under the effect of the downward elastic restoring force, the fixing pin 52 pushes the elastic barb 35 downward to open outward. Since the contact surface of the elastic barb 35 and the fixing pin is the guiding slope 352, the elastic barb 35 is subjected to an oblique force, as shown by the arrow in the figure, so that it is opened downwards outward. Conveniently, the space leading to the bottom surface 313 of the left guide groove 311 is also opened. The fixing pin 52 continues to move until it is stopped by the bottom surface 313 of the left guiding groove 311. At this time, the safety protective cover 5 of the medical injector is in the final position after use, and the safety protective cover 5 also completely shields the end of the needle tube 6, as shown in FIG.

Further, if the safety cover 5 is to be pushed back to the working position, please refer to FIG. 7 , when the safety cover 5 is pressed upward, and the fixing pin 52 is upwardly subjected to the elastic barb. The blocking of 35, the two will interfere with each other, because the elastic barb 35 is subjected to an upward force, as indicated by the arrow in the figure, and therefore only causes it to expand upward, thereby closing the left guiding groove 311. Up channel. Thus, the fixing pin 52 cannot continue to move upward, and even if the external force is increased, it can only destroy its own structure. Therefore, it can be effectively prevented from being improperly recycled and used twice.

Further, in the embodiment, the unidirectional passage and the reverse abutment conflict between the guiding elastic piece 33, the elastic barb 35 and the fixing pin 52 may have various changing structures in different embodiments. In the spirit of the invention, it should be considered as equivalent variations of the structures disclosed herein.

Further, for the arrangement of the spring 4, it is not necessarily necessary, and the fixing pin 52 of the safety protective cover 5 can be blocked by the elastic barb 35 by an external force, and the spring 4 is disposed. Just to make the operation easier.

The invention relates to a medical injector which adopts a newly designed safety protective cover structure and a card seat structure matched thereto, so that after the injection is completed, the safety protective cover can protrude from the card seat, and The end of the needle tube is completely shielded, so that safety problems that may be caused by the tip end of the needle tube being exposed after use are prevented.

The technical scope of the present invention is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present invention. Within the scope of the invention.

Claims

A medical syringe includes a needle holder, a card holder, a safety protective sleeve and a needle tube; wherein the card holder is provided with a receiving cavity, and the needle seat and the safety protective sleeve are respectively disposed on the card holder An upper portion and a lower portion of the cavity, the needle tube is disposed in the needle holder and extends downwardly into the safety protection sleeve; the safety protection sleeve is movable up and down within the card holder receiving cavity to cooperate with the needle tube The injection operation; wherein the card holder is provided with a guide groove extending upwardly and downwardly, and the guide groove is provided with a guide elastic piece, and the lower part of the guide groove is divided into a left guide groove and a right guide a two parts of the groove, wherein a bottom surface of the right guide groove is higher than a bottom surface of the left guide groove, and the safety protection sleeve is provided with a fixing pin;

Wherein when the fixing pin is disposed in the right guiding groove and is limited by the bottom surface thereof, the safety protection sleeve is located at an initial position with respect to the card seat; and the safety protection sleeve is at the card seat The upward movement in the receiving cavity enables the fixing pin to enter the upper portion of the guiding groove from the right guiding groove upward through the blocking of the guiding elastic piece, and the safety protective cover is located relative to the card seat work location.
A medical injector according to claim 1 wherein said downward movement of said safety guard within said receiving cavity causes said securing pin located in said upper portion of said channel to be Guided by the guiding elastic piece, the left guiding channel is accessed.
A medical injector according to claim 1 wherein said guide tabs extend obliquely upwardly within said channel to at least partially obscure an upper opening of said right channel.
A medical injector according to claim 1 or 2, wherein said left guide groove is further provided with an elastic barb which extends downwardly in said left guide groove.
A medical injector according to claim 4, wherein said resilient barb extends obliquely downwardly within said left channel and at least partially shields upper and lower communication of said left channel.
A medical injector according to claim 4; wherein the end of said elastic barb is provided with a downwardly inclined guide bevel.
A medical injector according to claim 1, wherein said safety guard sleeve completely shields the end of said needle tube when said bottom surface of said left channel is positioned such that said fixing pin is in this position Needle tip.
A medical injector according to claim 1 or 2, wherein an elastic member is disposed between the hub and the safety cover.
A medical injector according to claim 1 wherein said resilient member comprises a spring.
A medical injector according to claim 1; further comprising a needle guard sleeve disposed outside the card holder.