CN219630337U

CN219630337U - Valve switching device of injection needle assembly

Info

Publication number: CN219630337U
Application number: CN202223536942.0U
Authority: CN
Inventors: 田俊涛; 林博飞; 王腾飞; 陈炜; 林伟林
Original assignee: Zhuhai Radisson Medical Technology Co ltd
Current assignee: Zhuhai Radisson Medical Technology Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-09-05
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses a valve switching device of an injection needle assembly, which aims to solve the problem that a needle tube cannot be reused in the field of medical equipment and comprises a connector, a valve switching device and a valve switching device, wherein the connector is used for connecting an injector; the steering valve is arranged on the joint, the steering valve is provided with a channel, the lower end of the channel deviates from the axis of the steering valve, and the upper end of the channel is communicated with the joint; the injection needle is internally provided with a detection needle, and the steering valve can rotate relative to the injection needle, so that the lower end of the channel is respectively communicated with the inner cavity of the injection needle and the inner cavity of the detection needle.

Description

Valve switching device of injection needle assembly

Technical Field

The utility model relates to the field of medical equipment, in particular to a valve switching device of an injection needle assembly.

Background

With the increasing use of dermal fillers, a number of complications have been reported; of these, the most serious is intravascular injection, which may lead to skin necrosis, blindness or stroke. During the process of collecting a blood sample from a vein, our needle tip penetrates the vessel wall and lumen. The veins and arteries of the human body have natural blood pressure. When the needle tip is in the lumen of the blood vessel, blood will flow into the lumen of the needle and fill the lumen due to the blood pressure differential between the lumen and the blood vessel. Thus, it is possible to observe the blood in the lumen and to know if the needle tip is in the lumen of the blood vessel.

The existing injection needle tube is generally provided with two channels which are not communicated completely, namely an injection needle head and a detection needle head, when blood flows into the inner cavity of the needle, the blood needs to be pulled out, and the blood is prevented from being injected into blood vessels, but the detection needle head is filled with blood samples, the needle tube is used for reinjection, the needle tube needs to be replaced, otherwise, the next detection is easily influenced, and the needle tube cannot be reused.

Disclosure of Invention

The utility model provides a valve switching device of an injection needle assembly, which aims at solving at least one of the technical problems existing in the prior art.

The technical scheme of the utility model is a valve switching device of an injection needle assembly, which comprises:

the joint is used for connecting the syringe;

the steering valve is rotatably arranged on the joint, the steering valve is provided with a channel, the lower end of the channel deviates from the axis of the steering valve, and the upper end of the channel is communicated with the joint;

the injection needle is internally provided with a detection needle, and the steering valve can rotate relative to the injection needle, so that the lower end of the channel is respectively communicated with the inner cavity of the injection needle and the inner cavity of the detection needle.

Further, one of the joint and the steering valve is provided with a first annular groove, and the other is provided with a first annular block, and the first annular groove is matched with the first annular block, so that the joint can rotate relative to the steering valve.

Further, one of the steering valve and the injection needle is provided with a second annular groove, and the other is provided with a second annular block, and the second annular groove is matched with the second annular block, so that the steering valve can rotate relative to the injection needle.

Further, one of the steering valve and the injection needle is provided with a locking groove, and the other is provided with a locking block, and the locking groove is matched with the locking block, so that the steering valve and the injection needle are relatively fixed.

Further, a sealing layer is arranged between the steering valve and the injection needle.

Further, the syringe further comprises an outer shell and an inner shell, wherein the inner shell is embedded into the outer shell, the syringe needle is arranged on the outer shell, and the detection needle is arranged on the inner shell.

Further, the inner shell is provided with an injection hole and a detection hole, the injection hole is communicated with the inner cavity of the detection needle, and the detection hole is communicated with the inner cavity of the detection needle.

Further, the outer housing is provided with a stepped groove, and the stepped groove is matched with the inner housing.

Further, the diameter of the channel gradually decreases from top to bottom.

Further, the injection needle is a sharp bottom opening or a side opening.

The beneficial effects of the utility model are as follows.

1. When in injection, the channel of the steering valve is communicated with the detection needle head, if the needle point is inserted into the blood vessel cavity, blood flows into the cavity of the needle and fills the cavity due to the blood pressure difference between the cavity and the blood vessel, the blood in the cavity can be observed through observing the cavity, whether the needle point is in the blood vessel cavity or not is judged, if the blood vessel is not pricked, the steering valve can be rotated, the channel of the steering valve is communicated with the injection needle head and is connected with the injector through the connector, and the injector can inject liquid medicine through the injection needle head; when the needle tip is inserted into a blood vessel, after the needle tube is taken out, the joint is connected with the injector, and normal saline can be introduced to clean blood in the injection needle, so that the injection needle can be reused.

Drawings

FIG. 1 is a schematic view showing the general structure of a valve switching device of an injection needle assembly and an enlarged schematic view of a portion A according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a valve switching device of an injection needle assembly according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a steering valve according to an embodiment of the present utility model;

FIG. 4 is a schematic view showing the structure of an injection needle and a detection needle according to an embodiment of the present utility model;

fig. 5 is a schematic view of an injection needle with a sharp bottom opening and a side opening.

Reference numerals:

a joint 100, a first annular block 110;

a diverter valve 200, a channel 210, a first annular groove 220, a second annular groove 230, a locking groove 240;

the injection needle 300, the second annular block 310, the locking block 320, the outer housing 330, the stepped groove 33;

a detection needle 400, a sealing layer 410, an inner housing 420.

Detailed Description

The following description will describe several embodiments of the present utility model, including the embodiments corresponding to the accompanying drawings, it being understood that the drawings are for aiding in the understanding of the technical features and technical solutions of the present utility model, and should not be construed as limiting the scope of the present utility model.

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, aspects, and effects of the present utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that, unless explicitly defined otherwise, when a certain feature is referred to as being "fixed," "connected," or "mounted" on another feature, it may be directly fixed or connected to the other feature or may be indirectly fixed or connected to the other feature, and the terms such as "fixed," "connected," or "mounted" should be interpreted broadly, so that those skilled in the art can reasonably determine the specific meaning of the terms in the present utility model in combination with the specific contents of the technical scheme.

It should be noted that, the description of the orientation or positional relationship indicated by the upper, lower, left, right, top, bottom, front, rear, inner, outer, etc. used in the present utility model is based on the orientation or positional relationship of the drawings or the embodiments, only for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in the specific orientation, and thus should not be construed as limiting the present utility model.

It is noted that the term "and/or" as used in the present utility model includes any combination of one or more of the listed items, a plurality of means one or more, a plurality of means two or more, greater than, less than, exceeding, etc. are understood to exclude this number, and above, below, within, etc. are understood to include this number.

It should be noted that, if the first and second descriptions are only used for distinguishing technical features in the present utility model, the description should not be construed as indicating or implying relative importance or implying the number of the indicated technical features or implying the precedence relationship of the indicated technical features.

It is to be understood that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless explicitly defined otherwise. The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1-5, a basic embodiment of a first aspect of the present utility model provides a valve switching device for an injection needle assembly, comprising:

a connector 100 for connecting to a syringe;

a steering valve 200 rotatably provided at the joint 100, the steering valve 200 being provided with a passage 210, a lower end of the passage 210 being offset from an axis of the steering valve 200, an upper end of the passage 210 being communicated with the joint 100;

the injection needle 300 is internally provided with a detection needle 400, and the steering valve 200 can rotate relative to the injection needle 300, so that the lower end of the channel 210 is respectively communicated with the inner cavity of the injection needle 300 and the inner cavity of the detection needle 400.

In the valve switching device of the injection needle assembly according to the basic embodiment of the first aspect of the present utility model, when injecting, the channel 210 of the steering valve 200 is communicated with the detecting needle 400, if the needle tip is inserted into the lumen of the blood vessel, blood will flow into the inner cavity of the needle and fill the cavity due to the blood pressure difference between the cavity and the blood vessel, the blood in the cavity can be observed through the observation cavity, whether the needle tip is in the lumen of the blood vessel is judged, if the blood vessel is not pricked, the steering valve 200 can be rotated, the channel 210 of the steering valve 200 is communicated with the injection needle 300 and is connected with the injector through the connector 100, and the injector can inject the liquid medicine through the injection needle 300; when the needle tip is inserted into a blood vessel, after the needle tube is taken out, the joint 100 is connected with the injector, and normal saline can be introduced to clean blood in the injection needle, so that the injection needle 300 can be reused; the passage 210 enables communication between different syringes by the off-axis arrangement of the diverter valve 200.

It will be appreciated that the detection needle 400 is disposed in the injection needle 300, and the diameter of the injection needle 300 is smaller than that of the detection needle 400, so that the detection needle 400 can be disposed in the injection needle 300, and the inner cavity of the injection needle 300 is a space between the inner wall of the detection needle 400 and the outer wall of the detection needle 400, and the inner cavity of the detection needle 400 is a space inside the detection needle 400.

In some embodiments, both the adapter 100 and the diverter valve 200 are transparent structures for ease of viewing by the user.

In some embodiments, the adapter 100 and the diverter valve 200 are provided with a first annular groove 220 on one side and a first annular block 110 on the other side, the first annular groove 220 and the first annular block 110 cooperating to enable rotation of the adapter 100 relative to the diverter valve 200. When the steering valve 200 is rotated, the joint 100 is prevented from rotating together therewith, so that the steering valve 200 is convenient to adjust the angle.

In some embodiments, the diverter valve 200 is coupled to the needle 300, one of which is provided with a second annular groove 230 and the other of which is provided with a second annular block 310, the second annular groove 230 and the second annular block 310 cooperating to enable the diverter valve 200 to rotate relative to the needle 300. When the steering valve 200 is rotated, the injection needle 300 is prevented from rotating together therewith, so that the steering valve 200 is conveniently adjusted in angle.

In some embodiments, one of the steering valve 200 and the injection needle 300 is provided with a locking groove 240, and the other is provided with a locking block 320, and the locking groove 240 cooperates with the locking block 320 to fix the steering valve 200 and the injection needle 300 relatively. By the cooperation of the locking groove 240 and the locking block 320, the relative positions of the channel 210 and the detecting needle 400 can be determined, the channel 210 can be aligned with the detecting needle 400 and the steering valve 200 and the injection needle 300 can be prevented from rotating relatively, so that the channel 210 can be kept in communication with the detecting needle 400; when the detection is completed, the steering valve 200 is rotated, the locking block 320 is slightly deformed, so that the locking block 320 passes through the locking groove 240 and is engaged with the other locking groove 240 after being rotated to a certain angle, and the passage 210 is communicated with the inner cavity of the injection needle 300 and is kept relatively fixed.

Further, the depth of the locking groove 240 is 0.5mm-1mm, and the main function of the locking groove 240 is to determine that the channel 210 and the detecting needle 400 can be communicated, so that the relative positions of the steering valve 200 and the detecting needle 400 are accurate under the condition of no external force, and therefore, the deeper locking groove 240 is not needed, and the rotation of the steering valve 200 is facilitated by adopting the smaller depth of the locking groove 240.

In some embodiments, a sealing layer 410 is provided between diverter valve 200 and injection needle 300. Communication between the injection needle 300 and the detection needle 400 is prevented by the sealing layer 410, so that blood of the detection needle tube permeates into the injection needle 300 or injection liquid of the injection needle 300 permeates into the detection needle 400.

In some embodiments, the device further comprises an outer housing 330 and an inner housing 420, wherein the inner housing 420 is embedded in the outer housing 330, the injection needle 300 is arranged on the outer housing 330, and the detection needle 400 is arranged on the inner housing 420. During installation, the injection needle 300 is firstly installed to the outer shell 330, the detection needle 400 is installed to the inner shell 420, then the inner shell 420 is installed to the outer shell 330, the injection needle 300 and the inner shell 420 are respectively installed, processing difficulty is reduced, and installation and use are facilitated.

In some embodiments, the inner housing 420 is provided with an injection hole in communication with the lumen of the detection needle 400 and a detection hole in communication with the lumen of the detection needle 400. The passage 210 is respectively communicated with the detection hole and the injection hole by the detection hole and the injection hole provided on the inner housing 420, and the flow direction of the passage 210 is regulated by the relative rotation between the inner housing 420 and the detection needle 400.

In some embodiments, the outer housing 330 is provided with stepped slots 331, the stepped slots 331 cooperating with the inner housing 420. The inner housing 420 is easily mounted to the outer housing 330 by the stepped groove 331 of the outer housing 330.

In some embodiments, one of the outer housing 330 and the inner housing 420 is provided with a limiting groove, and the other is provided with a limiting block, and the limiting groove cooperates with the limiting block to fix the inner housing 420 and the outer housing 330 relatively. Through the cooperation of the limit groove and the limit block, the inner housing 420 can be inserted into the inner housing 420 along the clearance of the limit block, so that the inner housing and the outer housing are prevented from rotating relatively, the positions of the detecting needle head 400 and the injection needle head 300 are uncertain, and the communication of the channel 210 of the steering valve 200 is inconvenient.

In some embodiments, the diameter of the channel 210 gradually decreases from top to bottom. The diameter of the channel 210 is adapted to the diameter of the needle cannula.

In some embodiments, the injection needle 300 is a bottom sharp opening or a side opening. The embodiment of the present utility model is applicable to the injection needle 300 of the two connectors 100 shown in fig. 5 to expand its applicable scope.

It is noted that terms like "one embodiment," "some embodiments," "base embodiments," "extended embodiments," and the like may be used throughout this specification to describe several embodiments of the utility model, as a particular feature, structure, material, or characteristic of the several embodiments may be combined without departing from the principles and spirit of the present utility model.

While there has been shown and described what is considered to be certain embodiments of the present utility model, it is to be understood that the utility model is not limited to the above-described embodiments, but is to be accorded the widest scope consistent with the principles and novel features of the present utility model.

Claims

1. A valve switching device for an injection needle assembly, comprising:

a connector (100) for connecting to a syringe;

the steering valve (200) is rotatably arranged on the joint (100), the steering valve (200) is provided with a channel (210), the lower end of the channel (210) deviates from the axis of the steering valve (200), and the upper end of the channel (210) is communicated with the joint (100);

the injection needle (300) is internally provided with a detection needle (400), and the steering valve (200) can rotate relative to the injection needle (300) so that the lower end of the channel (210) is respectively communicated with the inner cavity of the injection needle (300) and the inner cavity of the detection needle (400).

2. Valve switching device of an injection needle assembly according to claim 1, characterized in that the joint (100) and the diverter valve (200), one of which is provided with a first annular groove (220) and the other with a first annular block (110), the first annular groove (220) and the first annular block (110) cooperating such that the joint (100) can rotate with respect to the diverter valve (200).

3. Valve switching device of an injection needle assembly according to claim 1, characterized in that the diverter valve (200) is coupled to the injection needle (300), one of which is provided with a second annular groove (230) and the other with a second annular block (310), the second annular groove (230) and the second annular block (310) cooperating such that the diverter valve (200) can rotate relative to the injection needle (300).

4. The valve switching device of the injection needle assembly according to claim 1, wherein the steering valve (200) and the injection needle (300) are provided with a locking groove (240) on one side and a locking block (320) on the other side, and the locking groove (240) cooperates with the locking block (320) to fix the steering valve (200) and the injection needle (300) relatively.

5. The valve switching device of an injection needle assembly according to claim 1, wherein a sealing layer (410) is provided between the diverter valve (200) and the injection needle (300).

6. The valve switching device of the injection needle assembly according to claim 1, further comprising an outer housing (330) and an inner housing (420), wherein the inner housing (420) is embedded in the outer housing (330), wherein the injection needle (300) is provided in the outer housing (330), and wherein the detection needle (400) is provided in the inner housing (420).

7. The valve switching device of the injection needle assembly according to claim 6, wherein the inner housing (420) is provided with an injection hole and a detection hole, the injection hole being in communication with the inner cavity of the detection needle (400), the detection hole being in communication with the inner cavity of the detection needle (400).

8. The valve switching device of the needle assembly according to claim 6, wherein the outer housing (330) is provided with a stepped groove (331), the stepped groove (331) being mated with the inner housing (420).

9. The valve switching device of the needle assembly according to claim 1, wherein the diameter of the channel (210) gradually decreases from top to bottom.

10. The valve switching device of an injection needle assembly according to claim 1, wherein the injection needle (300) is a bottom sharp opening or a side opening.