CN219539122U - Injection needle assembly - Google Patents

Abstract

The utility model discloses an injection needle assembly for solving the problem of insufficient installation precision of injection needles in the field of medical products, which comprises a needle seat, a needle seat and a needle seat, wherein the needle seat is provided with a through channel, and an upper stop block is arranged on the inner side wall in the middle of the through channel; the positioning block is provided with a lower stop block, the upper stop block can be abutted against the lower stop block at the upper part, the upper part of the positioning block is arranged in the positioning groove, and a positioning concave position is formed between the outer side wall of the positioning block and the inner side wall of the positioning groove; the upper end of the needle tube extends out of the needle seat, the lower end of the needle tube is positioned in the positioning concave position, the lower end of the needle tube is communicated with the injection channel, and the lower end of the needle tube is in glue connection with the inner side wall of the positioning concave position; the needle seat is provided with a glue injection hole at the position corresponding to the positioning concave position, and the glue injection hole is communicated with the positioning concave position. According to the injection needle assembly, the upper stop block and the lower stop block are matched, so that the injection needle assembly can be quickly installed, the needle tube can be firmly and fixedly connected with the needle seat, and the installation accuracy and the installation efficiency of the injection needle assembly are improved.

Description

Injection needle assembly

Technical Field

The present utility model relates to the field of medical products, and in particular to injection needle assemblies.

Background

The injection needle is generally used for injecting medicine below the epidermis of the skin, and because the density of the skin is high and the skin is thin, the injection position is shallow when the intradermal or subcutaneous injection operation is carried out, especially when the intradermal injection is carried out, so that the injection resistance is large when the injection operation is carried out by adopting a single injection needle.

Disclosure of Invention

The injection needle assembly and the needle loading method aim to at least solve one of the technical problems in the prior art and effectively improve the installation accuracy of the injection needle assembly.

A first aspect of the present utility model provides an injection needle assembly comprising:

the needle seat is provided with a through channel extending up and down, the inner side wall in the middle of the through channel is provided with an upper stop block, and the through channel comprises a positioning groove positioned above the upper stop block and an injection channel positioned below the upper stop block;

the positioning block is provided with a lower stop block, the upper stop block can be abutted against the lower stop block at the upper part, the upper part of the positioning block is arranged in the positioning groove, and a positioning concave position is formed between the outer side wall of the positioning block and the inner side wall of the positioning groove;

the upper end of the needle tube extends out of the needle seat, the lower end of the needle tube is positioned in the positioning concave position, the lower end of the needle tube is communicated with the injection channel, and the lower end of the needle tube is in glue connection with the inner side wall of the positioning concave position;

the needle seat is provided with a glue injection hole which is communicated with the positioning concave position.

Further, the upper stop block and the lower stop block are provided with matched limiting structures.

Further, the limit structure includes:

an upper inclined plane arranged on the upper stop block;

a lower inclined surface arranged on the lower stop block;

the upper inclined plane and the lower inclined plane can be mutually abutted.

Further, the outer side walls at two sides of the positioning block are respectively provided with a lower stop block, and the inner side walls at two sides of the through channel are respectively provided with an upper stop block correspondingly;

the lower stop block is positioned on the outer side wall of the lower end of the positioning block.

Further, the positioning concave is arranged on the outer side wall of the positioning block, and the positioning concave extends along the vertical direction in a straight line.

Further, the positioning block comprises at least four outer side walls, and the positioning concave position and the lower stop block are arranged on different outer side walls of the positioning block.

Further, the positioning concave is arranged on the inner side wall of the positioning groove, and the positioning concave linearly extends along the up-down direction.

Further, the included angle range between the edge surface at the upper end of the needle tube and the up-down direction is [10 degrees, 20 degrees ];

the length of the upper end of the needle tube extending out of the needle seat is 0.1mm and 5 mm.

Further, the lower end of the needle tube is provided with a non-planar positioning structure.

Further, four positioning concave positions are arranged on the positioning block side by side, four needle tubes are arranged in the corresponding positioning concave positions, the upper ends of the four needle tubes are edge surfaces, and the shapes and the orientations of the four edge surfaces are the same.

The beneficial effects of the utility model are as follows:

according to the injection needle assembly, the space for placing the needle tube is provided by the positioning concave position formed by the positioning block matched with the positioning groove, the glue injection hole is arranged to provide a channel for injecting glue from outside to inside, the positioning block is convenient to install by matching the upper stop block and the lower stop block, the installation efficiency of a product is remarkably improved, the needle tube can be fixedly connected with the needle seat more firmly, and the installation precision and the installation efficiency of the injection needle assembly are improved.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of an injection needle assembly;

FIG. 2 is a schematic diagram of a side perspective structure of an embodiment of an injection needle assembly;

FIG. 3 is a schematic diagram of a side perspective structure of an embodiment of a needle mount clip;

FIG. 4 is a schematic view of the structure of an embodiment of the needle loading method;

fig. 5 is a schematic structural view of an embodiment of the hub;

FIG. 6 is a schematic view of an embodiment of a positioning block;

FIG. 7 is a schematic view of the construction of embodiment A of the needle cannula;

fig. 8 is a schematic view of the structure of the needle tube of embodiment B.

Reference numerals:

needle holder 100, through passage 110, positioning groove 120, injection passage 130, upper stopper 140, upper inclined surface 141,

A positioning block 200, a lower stop block 210, a lower inclined surface 211,

300 parts of positioning concave position,

Needle cannula 400, facet 410,

500 parts of glue injection hole,

Needle mounting fixture 600, base 610, mounting groove 620, mounting base 630, mounting post 640, mounting hole 650, bearing surface 660,

Positioning structure 700.

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, meaning one or more, meaning at least two, greater than, less than, exceeding, etc. are understood to exclude this number, and the 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.

The basic embodiment of the present utility model provides an injection needle assembly, with reference to fig. 1-8, comprising:

the needle stand 100 is provided with a through passage 110 extending up and down, an upper stop block 140 is arranged on the inner side wall in the middle of the through passage 110, and the through passage 110 comprises a positioning groove 120 positioned above the upper stop block 140 and an injection passage 130 positioned below the upper stop block 140;

the positioning block 200 is provided with a lower stop block 210, the upper stop block 140 can be abutted against the lower stop block 210 at the upper part, the upper part of the positioning block 200 is arranged in the positioning groove 120, and a positioning concave position 300 is formed between the outer side wall of the positioning block 200 and the inner side wall of the positioning groove 120;

the upper end of the needle tube 400 extends out of the needle seat 100 and the lower part is positioned in the positioning concave 300, the lower end of the needle tube 400 is communicated with the injection channel 130, and the lower part of the needle tube 400 is in glue connection with the inner side wall of the positioning concave 300;

the needle stand 100 is provided with a glue injection hole 500, and the glue injection hole 500 is communicated with the positioning concave 300.

The injection needle assembly of the utility model provides a space for placing the needle tube 400 through the positioning concave 300 formed by the positioning block 200 matched with the positioning groove 120, provides a channel for injecting glue from outside to inside through the arrangement of the glue injection hole 500, facilitates the installation of the positioning block 200 through the matching of the upper stop block 140 and the lower stop block 210, remarkably improves the installation efficiency of products, and the needle tube 400 can be fixedly connected with the needle seat 100 more firmly, thereby improving the installation precision and the installation efficiency of the injection needle assembly.

It can be appreciated that, referring to fig. 1 and 2, the injecting glue hole can be arranged at the upper end of the needle seat, namely, the upper end opening of the needle seat is arranged as the injecting glue hole, the lower part of the needle tube is arranged into the positioning concave position through the injecting glue hole, the injecting glue hole at the upper end of the needle seat is used for injecting glue to complete the glue connection of the needle tube and the positioning concave position, the injecting glue process is more convenient, and the automatic injecting glue equipment is arranged above the injecting glue hole.

It will be appreciated that the lateral direction may be set relative to the up-down direction and may be oriented vertically in the up-down direction.

It will be appreciated that the upper and lower ends correspond to the end positions of the member in that direction and the upper and lower portions correspond to the partial configuration of the member in the direction.

It can be understood that the injection channel is used for communicating the handle, and the handle communicates the host computer, through host computer and handle control input injection to this injection needle subassembly, rethread this injection needle subassembly puncture skin is the injection liquid injection human body, and this injection needle subassembly can be applied to medical injection field.

It can be understood that the positioning concave position can be a groove position extending up and down, the groove position can form a hole position through the outer side wall of the positioning block and the inner side wall of the positioning groove, and the cross section of the positioning concave position which is normal to the up and down direction can be in a regular shape or an irregular shape.

It will be appreciated that the lower end of the needle cannula may be located at the lower end of the locating slot and that the injection passage directs the injectate into the lower end of the needle cannula by tapering from bottom to top.

It will be appreciated that the lower portion of the needle cannula may be disposed within the locating recess and the lower portion may comprise between 30% and 80% of the overall length of the needle cannula.

It is understood that the glue connection mode may be a connection mode formed by curing the adhesive injected into the positioning concave position through the glue injection hole.

It is understood that the adhesive may be a general purpose adhesive.

In an extension of the basic embodiment, referring to fig. 5 and 6, the upper stopper 140 and the lower stopper 210 may be provided with cooperating limit structures, which may be used to fix the relative position between the upper stopper 140 and the lower stopper 210.

Further development of the basic embodiment, the limiting structure may include:

an upper inclined surface 141 provided at the upper stopper 140;

a lower inclined surface 211 provided at the lower stopper 210;

the upper inclined surface 141 and the lower inclined surface 211 can abut against each other. This embodiment of the stop mechanism facilitates the processing of the hub 100 and also the processing of the positioning block 200. The upper stop 140 and the lower stop 210 may be configured as blocks of triangular cross-section.

It can be understood that the limit structure can also be an elastic buckle mode, for example, one of the upper stop block and the lower stop block can be provided with a buckling position, the other one of the upper stop block and the lower stop block can be provided with an elastic bulge, and the elastic bulge can be buckled into and separated from the buckling position under the driving of external force through the self elastic deformation capacity, so that the fixing and the separating of the upper stop block and the lower stop block are completed, and the installation of the positioning block in the positioning groove is further completed.

Further development of the basic embodiment, referring to fig. 5 and 6, the outer side walls of the two sides of the positioning block 200 are respectively provided with a lower stop block 210, and the inner side walls of the two sides of the through channel 110 are respectively correspondingly provided with an upper stop block 140;

the lower stopper 210 is located at the outer sidewall of the lower end of the positioning block 200. The positioning effect of the positioning block 200 can be better through the embodiment, the setting positions of the two sides of the positioning block 200 are relatively flush, and the subsequent needle loading operation is facilitated.

In an extension of the basic embodiment, referring to fig. 2, the positioning concave 300 is disposed on the outer sidewall of the positioning block 200, where the positioning concave 300 extends linearly along the up-down direction, and the outer sidewall of the positioning block 200 and the inner sidewall of the positioning slot 120 can form a hole site. This arrangement facilitates the machining of locating recesses 300 in locating block 200.

In addition to the basic embodiment, referring to fig. 2, the positioning block 200 includes at least four outer sidewalls, and the positioning recess 300 and the lower stopper 210 are disposed on different outer sidewalls of the positioning block 200. This arrangement prevents the lower stop 210 from interfering with the needle loading process.

In an expansion of the basic embodiment, the positioning concave position can be arranged on the inner side wall of the positioning groove, the positioning concave position linearly extends along the up-down direction, and the outer side wall of the positioning block can also form a hole position with the inner side wall envelope of the positioning groove. The arrangement is convenient for controlling the clearance of the positioning block in the positioning groove, so that the positioning block is more tightly matched with the positioning groove.

1, 2, 4, 5, the injection channel 130 includes a tapered portion, the radial area of which gradually decreases from bottom to top, the tapered portion being configured to facilitate introduction of an injection fluid into the syringe 400; the lower end of hub 100 is provided with a male or female luer fitting that facilitates connection of the needle assembly to other components.

Development of the basic embodiment referring to fig. 1 and 2, the lower end of the needle holder 100 is provided with a male or female luer fitting. This arrangement facilitates the needle assembly to connect to the handle.

In an extension of the basic embodiment and referring to fig. 7 and 8, the upper end of the needle cannula 400 is provided with a blade surface 410, and the blade surface 410 at the upper end of the needle cannula 400 is used for puncturing the skin for infusion.

It will be appreciated that the facets may be formed by at least one bevel, i.e. two bevels in series, each bevel may be at a different angle, or some bevels may be at different angles.

The expansion of the basic embodiment ensures that the included angle between the edge surface at the upper end of the needle tube and the up-down direction is 10 degrees and 20 degrees, and the puncture effect of the needle tube is good in the range.

Extension of the basic embodiment, referring to fig. 7 and 8, the lower end of the needle cannula 400 is provided with a non-planar positioning structure 700. The positioning structure 700 is convenient for the needle tube 400 to rotate around its axis by shaking when the needle tube 400 is mounted, and is attached to the bottom of the mounting hole 650, and the angle of the needle tube 400 is stable, referring to the state of fig. 4.

It will be appreciated that the positioning structure 700 may take the form of the facet 410 of fig. 7, or may take the form of the recess of fig. 8, or any other concave-convex structure that enables the bottom of the needle cannula 400 to be attached to the bottom of the mounting hole 650 and to be positioned in a relatively fixed position after shaking is also included in embodiments that may be included in the positioning structure 700.

The extension of basic embodiment, the length that the needle tubing upper end stretches out of the needle file is [0.1mm,5mm ], and the puncture effect of needle tubing is good in this scope, and the degree of depth of injection needle subassembly puncture skin is convenient for control.

In an expansion of the basic embodiment, four positioning concave positions are preferably arranged on the positioning block side by side, four needle tubes are arranged in the corresponding positioning concave positions, the upper ends of the four needle tubes are edge surfaces, and the shapes and the orientations of the four edge surfaces are the same. This arrangement results in a four needle injection needle assembly, which is more versatile.

The injection needle assembly of the basic embodiment of the present utility model may correspond to a needle loading method, referring to fig. 3 and 4, applied to the above-described injection needle assembly embodiment, and the needle loading method is applied to the needle loading jig 600;

the needle mount jig 600 includes:

a base 610;

a mounting groove 620 provided at an upper end of the base 610;

the mounting base 630 is convexly arranged at the lower end of the mounting groove 620, and the mounting base 630 corresponds to the inner contour of the injection channel 130;

the mounting column 640 is convexly arranged at the upper end of the mounting base 630, a mounting hole 650 is arranged at the upper end of the mounting column 640, and the lower end of the mounting hole 650 corresponds to the outer contour of the lower end of the needle tube 400;

as can be appreciated, referring to fig. 3, the installation groove 620 is provided for placing the lower part of the needle holder 100, the installation base 630 is provided for being placed in the lower part of the needle holder 100, the installation groove 620 and the installation base 630 are matched with each other to fix the lower part of the needle holder 100, the installation base is inserted into the positioning concave 300 from bottom to top for being placed in the lower part of the needle tube 400, the lower part of the needle tube 400 is attached to the lower part of the installation hole 650 in a shaking manner, and the angle of the needle tube 400 is adjusted and positioned, so that the subsequent glue injection and solidification are facilitated;

it can be appreciated that when the mounting post is inserted into the positioning concave portion, the top position of the mounting post can be lower than the position of the glue injection hole, and the arrangement is convenient for enabling part of the needle tube above the mounting post to be fully connected with the inner side wall of the positioning concave portion, so that the needle tube is more firmly installed after the glue injection is solidified, and referring to fig. 4, the position of the glue injection hole can be higher than the top of the mounting post;

the needle loading method comprises the following steps:

inserting the positioning block 200 into the needle seat 100 from the lower side of the needle seat 100 from the bottom to the top, wherein the positioning block 200 passes through the injection channel 130 until the upper stop block 140 abuts against the lower stop block 210, so that the upper part of the positioning block 200 is positioned in the positioning groove 120;

inserting the upper portion of the mounting base 630 into the needle holder 100 from below the needle holder 100 from the bottom to the top, causing the upper portion of the mounting base 630 to be positioned in the injection channel 130, and causing the mounting post 640 to be inserted into the positioning recess 300;

inserting the lower portion of the needle tube 400 into the mounting hole 650;

shaking the needle mounting clamp 600 to enable the lower end of the mounting hole 650 to be correspondingly attached to the outer contour of the lower end of the needle tube 400 stably;

injecting glue into the positioning concave 300 through the glue injection hole 500; curing;

the needle mount clamp 600 is removed.

The needle mounting method completes the positioning of the needle tube 400 and the needle seat 100 through the application of the needle mounting clamp 600, completes the fixation of the needle tube 400 and the needle seat 100 through glue injection and solidification, enables the positioning block 200 and the needle mounting clamp 600 to be matched with the needle seat 100 in the same direction through the upper stop block 140 and the lower stop block 210, can rapidly realize the installation and solidification of various parts of a product, and particularly can rapidly complete the consistent adjustment of the orientation of the edge face 410 of the needle tube 400.

It will be appreciated that, by the arrangement of the upper stopper 140 and the lower stopper 210, the positioning block 200 and the mounting base 630 can be arranged in the needle holder 100 in the same direction, and the method is faster and more convenient to install than the method of presetting the positioning block 200 and the method of arranging the positioning block 100 in the needle holder 100, so that the presetting step of the positioning block 200 is omitted, and the transportation and the movement of the needle tube 400 before the installation are also convenient, because the transportation of the needle tube 400 needs to keep an angle that the positioning block 200 cannot fall under the condition of preassembling the positioning block 200, and the relative requirement is higher.

Referring to fig. 3 and 4, the top of the mounting base 630 is provided with a bearing surface 660, and the bearing surface 660 is located at the side of the mounting post 640;

the needle loading method further comprises the following steps:

the positioning block 200 is placed on the supporting surface 660, and the upper portion of the mounting base 630 is inserted into the hub 100 together with the positioning block 200.

The injection needle assembly comprises four needle tubes 400, the first mounting holes 650 and the second mounting holes 650 are in one-to-one correspondence with the needle tubes 400, when the positions of the needle tubes 400 are stable, the edge surfaces 410 of the four needle tubes 400 face the same direction, and the edge surfaces 410 of each needle tube 400 can be located in the same direction under the arrangement, so that the mounting precision is further improved.

Under this setting, can place locating piece 200 on bearing face 660 earlier in the dress needle in-process, then make locating piece 200 and installation base 630 insert in needle file 100 lower part from bottom to top simultaneously, installation effectiveness is higher, and it is easier to realize automatic assembly, the transportation of locating piece 200 and place can accomplish through conveyor cooperation manipulator on bearing face 660, the transportation and the place of needle tubing 400 also can accomplish through the same mode, the required process is also less after realizing automaticly, assembly efficiency and assembly precision are all very high.

It will be appreciated that the present method may be applied to the mounting of injection needle assemblies with other pluralities of needle tubes.

Curing is completed by irradiation of an ultraviolet lamp. The setting can accomplish the solidification of adhesive fast, and ultraviolet lamp installation requirement is low and be convenient for remove the required position after the completion of preceding step.

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 (10)

1. An injection needle assembly, comprising:

the needle seat (100) is provided with a through passage (110) extending up and down, an upper stop block (140) is arranged on the inner side wall in the middle of the through passage (110), and the through passage (110) comprises a positioning groove (120) positioned above the upper stop block (140) and an injection passage (130) positioned below the upper stop block (140);

the positioning block (200) is provided with a lower stop block (210), the upper stop block (140) can be abutted against the lower stop block (210) at the upper part, the upper part of the positioning block (200) is arranged in the positioning groove (120), and a positioning concave position (300) is formed between the outer side wall of the positioning block (200) and the inner side wall of the positioning groove (120);

the upper end of the needle tube (400) extends out of the needle seat (100) and the lower part of the needle tube is positioned in the positioning concave position (300), the lower end of the needle tube (400) is communicated with the injection channel (130), and the lower part of the needle tube (400) is in glue connection with the inner side wall of the positioning concave position (300);

the needle seat (100) is provided with a glue injection hole (500), and the glue injection hole (500) is communicated with the positioning concave position (300).

2. The needle assembly of claim 1, wherein the upper stop (140) and the lower stop (210) are provided with cooperating limit features.

3. The needle assembly of claim 2, wherein the limit structure comprises:

an upper inclined surface (141) provided on the upper stopper (140);

a lower inclined surface (211) provided on the lower stopper (210);

the upper inclined surface (141) and the lower inclined surface (211) can be abutted against each other.

4. The injection needle assembly according to claim 1, wherein the outer side walls of both sides of the positioning block (200) are provided with the lower stopper (210), and the inner side walls of both sides of the through passage (110) are correspondingly provided with the upper stopper (140);

the lower stop block (210) is positioned on the outer side wall of the lower end of the positioning block (200).

5. The needle assembly according to claim 1, wherein the positioning recess (300) is provided on an outer sidewall of the positioning block (200), and the positioning recess (300) extends straight in an up-down direction.

6. The needle assembly of claim 5, wherein the positioning block (200) comprises at least four outer side walls, the positioning recess (300) and the lower stop (210) being provided on different outer side walls of the positioning block (200).

7. The needle assembly of claim 1, wherein the positioning recess (300) is provided on an inner sidewall of the positioning groove (120), and the positioning recess (300) extends straight in an up-down direction.

8. The injection needle assembly according to claim 1, wherein the angle between the upper edge surface (410) of the needle tube (400) and the up-down direction is in the range of [10 °,20 ° ];

the length of the upper end of the needle tube (400) extending out of the needle seat (100) is 0.1mm and 5 mm.

9. The injection needle assembly according to claim 1, wherein the needle cannula (400) is provided with a non-planar positioning structure (700) at its lower end.

10. The injection needle assembly according to claim 1, wherein four positioning recesses (300) are arranged on the positioning block (200) side by side, four needle tubes (400) are arranged in the corresponding positioning recesses (300), the upper ends of the four needle tubes (400) are provided with cutting faces (410), and the shapes and the orientations of the four cutting faces (410) are the same.