CN215875805U - Injection needle and injection hand tool - Google Patents

Abstract

The utility model discloses an injection needle, comprising: the upper cover is provided with an annular block, a plurality of accommodating groove groups are annularly distributed on the bottom surface of the annular block, each accommodating groove group comprises a plurality of accommodating grooves with sequentially increasing depths, and a sub-groove part with a first inclined surface is arranged between every two adjacent accommodating grooves; the lower cover is connected with the upper cover, a partition plate is arranged in the lower cover, and the partition plate is provided with a pin outlet hole; the needle outlet module comprises a pressing part, a main body part and a needle outlet part which are connected from top to bottom, the main body part is elastically connected between the partition plate and the annular block from top to bottom, and the needle outlet part is provided with a needle head corresponding to the needle outlet hole; the limiting ring is rotatably connected between the main body part and the annular block, a plurality of clamping blocks with second inclined planes are annularly arranged on the outer side of the limiting ring, and the second inclined planes are matched with the first inclined planes. The utility model can control the needle outlet length of the needle head in a segmented manner, thereby establishing a uniform needle inserting depth standard. Meanwhile, the utility model also provides an injection hand tool applying the injection needle.

Description

Injection needle and injection hand tool

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an injection needle and an injection hand tool.

Background

In the medical industry, particularly for the beauty medical industry, injection is one of the conventional treatment means, and the liquid medicine is injected under the skin (generally, the subcutaneous depth is 1cm-2cm) through an injection needle to obtain the corresponding beauty effect. For different individuals, the depth of the epidermis layer is different, some people are thin, some people are thick, and the therapist usually performs acupuncture according to personal experience, so that the unified acupuncture depth standard is lacked.

SUMMERY OF THE UTILITY MODEL

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

The utility model also provides an injection hand tool with the injection needle.

An injection needle according to an embodiment of a first aspect of the present invention comprises:

the inner top surface of the upper cover is provided with a downwardly extending annular block, the bottom surface of the annular block is annularly provided with a plurality of accommodating groove groups, each accommodating groove group comprises at least two accommodating grooves with sequentially increasing depths, and the accommodating grooves in each accommodating groove group are uniformly configured; a groove dividing part is arranged between every two adjacent accommodating grooves, a first inclined plane is arranged at the lower end of each groove dividing part, and all the first inclined planes are arranged towards the same direction;

the lower cover is connected with the upper cover, a horizontally arranged partition plate is arranged in the lower cover, and the partition plate is provided with a plurality of pin holes;

the needle outlet module comprises a pressing part, a main body part and a needle outlet part which are connected from top to bottom, the pressing part, the main body part and the needle outlet part are respectively provided with accommodating cavities which can be mutually communicated, the main body part is elastically connected between the partition plate and the annular block from top to bottom, the resilience direction of the main body part is upward, the pressing part penetrates through the annular block and extends upwards to the outside of the upper cover, a communicating pipe is hermetically connected between the main body part and the pressing part, the needle outlet part comprises a plurality of needle heads, and the needle heads and the needle outlet holes are arranged in a one-to-one correspondence manner;

the limiting ring is positioned between the main body part and the annular blocks and positioned on a moving path of the pressing part, at least two clamping blocks are annularly distributed on the outer peripheral surface of the limiting ring and used for clamping with the accommodating groove, and the number of the accommodating groove groups is integral multiple of the number of the clamping blocks; the upper end of each clamping block is provided with a second inclined plane, the upper limit of each second inclined plane is positioned on the same horizontal plane, and the second inclined planes are matched with the first inclined planes.

The injection needle provided by the embodiment of the utility model has at least the following beneficial effects: when the pressing part is pressed downwards, the pressing part drives the whole needle outlet module and the limiting ring to move downwards, so that all the clamping blocks of the limiting ring are separated from the accommodating grooves of the annular blocks; when the external force on the pressing part is removed, the pressing part does not limit the position of the clamping block any more, the second inclined surface of the clamping block slides to the next accommodating groove along the same direction under the action of resilience force, and the upper and lower positions of the main body part are limited by the upper and lower positions of the limiting ring, so that different needle withdrawing lengths can be controlled by changing the upper and lower positions of the limiting ring. Compared with the prior art, the utility model can control the needle outlet length of the needle head in a segmented manner, thereby establishing a uniform needle inserting depth standard, effectively improving the beauty effect and reducing the risk of medical accidents.

According to some embodiments of the utility model, the inner side wall of the annular block is provided with a plurality of rotation stopping grooves, the outer side wall of the pressing part is provided with a plurality of rotation stopping blocks, and the rotation stopping blocks are movably connected with the rotation stopping grooves up and down. Because the annular block and the upper cover do not rotate relatively and the upper cover and the lower cover do not rotate relatively, the pressing part can be in rotation stop and is movably connected with the annular block up and down.

According to some embodiments of the utility model, the pressing portion is a solid of revolution, the lower end of the pressing portion is provided with an annular sawtooth, the moving path of the annular sawtooth intersects with the second inclined surface of the limiting ring, the annular sawtooth is provided with a third inclined surface corresponding to the first inclined surface, and the second inclined surface and the third inclined surface are matched with each other. Because the annular sawtooth can with the second inclined plane butt of spacing ring, consequently when pressing the splenium to move down, it can drive the spacing ring moves down, and because the third inclined plane is located the inboard of first inclined plane, consequently the third inclined plane can promote the self-rotation of spacing ring.

According to some embodiments of the utility model, the lower limit of all the first inclined planes is on the same horizontal plane, so as to avoid interference between the first inclined planes and the second inclined planes.

According to some embodiments of the utility model, the shape of the receiving groove matches with the second inclined surface to stabilize the clamping connection between the two.

According to some embodiments of the utility model, each needle outlet hole is provided with a protective sleeve extending downwards, the needle outlet portion further comprises a plurality of needle sleeves, all the needle sleeves are connected to the lower bottom surface of the main body portion, each needle sleeve is connected with one needle, and the needle sleeves and the protective sleeves are arranged in a one-to-one correspondence manner. The needle sleeve and the protective sleeve are arranged, so that the positioning of the needle head can be improved; when the needle head is not out of the needle, the needle head is wrapped by the protective sleeve at the moment, so that the safety factor of the injection needle head is improved.

According to some embodiments of the present invention, the number of the needle outlets and the number of the needles are nine, and all the needle outlets and all the needles are distributed in a matrix. The setting of nine needles can show the injection efficiency that promotes.

According to some embodiments of the utility model, a plurality of springs are arranged up and down between the partition plate and the main body part, and the rebound directions of the springs are upward, so that the whole needle discharging module has elasticity.

According to some embodiments of the utility model, the partition divides an inner cavity of the lower cover into an upper cavity and a lower cavity, the lower cover is connected with a negative pressure pipe, and the negative pressure pipe is communicated with the lower cavity. When in injection, the skin of an individual can be adsorbed to the lower cover under the action of the negative pressure tube so as to solve the technical problem of inconvenient injection due to the elasticity of the skin.

The injection hand tool comprises a syringe, a pushing device and the injection needle, wherein the syringe is connected with the injection needle, and the pushing device is used for pushing a piston of the syringe.

The injection hand tool provided by the embodiment of the utility model has at least the following beneficial effects: the injection hand tool adopting the injection needle head can control the needle outlet length of the needle head in a segmented manner, so that a uniform needle inserting depth standard is established, the beauty effect is effectively improved, and the risk of medical accidents is reduced.

Additional aspects and advantages of the utility model 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 utility model.

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 an injection needle according to an embodiment of the present invention;

FIG. 2 is a perspective view of the injection needle of FIG. 1;

FIG. 3 is a front elevational view of the injection needle of FIG. 2;

FIG. 4 is an exploded view of the injection needle shown in FIG. 2;

FIG. 5 is a bottom view of the upper cover of the embodiment of the present invention;

FIG. 6 is a perspective view of the injection needle of FIG. 2 in a depressed state;

FIG. 7 is a front elevational view of the injection needle of FIG. 6;

FIG. 8 is a top plan view of the injection needle of FIG. 6;

FIG. 9 is a cross-sectional view of the injection needle of FIG. 8 taken along line A-A;

fig. 10 is a schematic perspective view of an injection handpiece according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present 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 the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, 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 present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If any description to first, second and third is only for the purpose of distinguishing technical features, it is 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 limited, terms such as arrangement, 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 above terms in the present invention in combination with the specific contents of the technical solutions.

The injection needle 10 according to the embodiment of the first aspect of the present invention includes an upper cover 100, a lower cover 200 and a needle discharging module 300, the upper cover 100 is structured as shown in fig. 1, 4 and 5, a lower bottom surface of the upper cover 100 is open, an upper top surface of the upper cover 100 is provided with a mounting hole 110, an inner top surface of the upper cover 100 is provided with a downwardly extending ring block 400, and a central axis of the ring block 400 coincides with a central axis of the mounting hole 110. A plurality of accommodating groove groups 410 are annularly arranged on the bottom surface of the annular block 400, each accommodating groove group 410 comprises four accommodating grooves 411 with sequentially increasing depths, and the accommodating grooves 411 in each accommodating groove group 410 are uniformly arranged, i.e. the number, spacing distance and depth arrangement of the accommodating grooves 411 in each accommodating groove group 410 are uniform; at this time, each adjacent two receiving grooves 411 are provided with a sub-groove portion 420 therebetween, the lower end of each sub-groove portion 420 is provided with a first inclined surface 421, and all the first inclined surfaces 421 are arranged toward the same direction. The four accommodating slots 411 in the accommodating slot group 410 respectively correspond to a narrowing gear, a short needle outlet gear, a middle needle outlet gear and a long needle outlet gear from deep to shallow, and it can be understood that the number of the accommodating slots 411 in the accommodating slot group 410 can also be three, five, six, etc., and the larger the number of the accommodating slots 411 is, the larger the number of the accommodating slots 411 in the accommodating slot group 410 is, but the number of the accommodating slots is necessarily two or more.

The structure of the lower cover 200 is as shown in fig. 1 and 4, the upper top surface and the lower bottom surface of the lower cover 200 are both open, the lower end of the upper cover 100 is provided with a first mounting edge strip 120, the upper end of the lower cover 200 is provided with a second mounting edge strip 230, the first mounting edge strip 120 is in snap-fit connection with the second mounting edge strip 230, so that the lower cover 200 is detachably connected to the upper cover 100; the inside of lower cover 200 is equipped with the baffle 210 that the level set up, baffle 210 divide into epicoele 201 and cavity 202 with the inner chamber of lower cover 200, baffle 210 is equipped with nine pinhole 220, nine go out pinhole 220 matrix distribution, every go out pinhole 220 all is equipped with downwardly extending's protective sheath 221, every protective sheath 221 all does not exceed out lower cover 200.

As shown in fig. 2 to 4, the needle discharging module 300 includes a pressing portion 310, a main body portion 320, and a needle discharging portion 330 connected from top to bottom, the pressing portion 310, the main body portion 320, and the needle discharging portion 330 are all provided with accommodating cavities 301 capable of communicating with each other, the main body portion 320 is located between the partition plate 210 and the annular block 400, the pressing portion 310 penetrates through the annular block 400 and extends upwards to the outside of the upper cover 100 through the mounting hole 110, and a communicating pipe 321 is connected between the main body portion 320 and the pressing portion 310 in a sealing manner. Go out needle portion 330 and include nine needle cover 331, nine needle cover 331 all establishes the lower bottom surface at main part 320, every needle cover 331 all is connected with one the syringe needle 332, the equal downwardly extending of the end of all syringe needles 332, the syringe needle 332 with go out the setting of pinhole 220 one-to-one, just needle cover 331 also with protective sheath 221 one-to-one sets up, makes every syringe needle 332 all can pass the play pinhole 220 that corresponds and extend to in the protective sheath 221 that corresponds, when syringe needle 332 does not go out the needle, this moment syringe needle 332 quilt protective sheath 221 parcel to promote injection needle 10's factor of safety. In order to enhance the positioning of the needle 332, both the needle sheath 331 and the protective sheath 221 may be selected to be reverse tapered, so that even if the needle 332 slightly deviates from the corresponding needle outlet 220, the needle sheath 331 can smoothly extend into the protective sheath 221, so that the needle 332 can extend out of the protective sheath 221. Although the nine needles are provided to significantly improve the injection efficiency, in other embodiments, the number of the needles 332 and the needle outlets 220 may be one, two, four, six, etc., without being limited thereto.

In order to make the needle discharging module 300 have elasticity, a plurality of springs 500 are arranged between the partition plate 210 and the main body part 320, the rebound direction of the springs 500 is upward, so that when the pressing part 310 is pressed downward, the needle discharging module 300 can move downward as a whole, and the springs 500 are in a force accumulation state, and when the external force on the pressing part 310 is removed, the needle discharging module 300 can reset upward as a whole under the effect of the rebound force of the springs 500. Specifically, the spring 500 is disposed between the protective sleeve 221 and the needle sleeve 331, at this time, one end of the spring 500 is sleeved outside the needle sleeve 331, and the other end of the spring 500 is sleeved by the protective sleeve 221. Since the number of the protective sleeve 221 and the needle sleeve 331 is nine, and both are distributed in a matrix, in order to enable the resilience force of the spring 500 to be distributed more smoothly, the number of the springs 500 may be four, and four springs 500 are distributed in a matrix.

As shown in fig. 6 to 9 and 4, in order to finally realize the adjustment of the needle extending length of the needle 332, the injection needle 10 further includes a limiting ring 600, the limiting ring 600 is rotatably sleeved outside the communication pipe 321, that is, the limiting ring 600 can freely rotate around the communication pipe 321, the limiting ring 600 is located between the main body portion 320 and the annular block 400, under the effect of the resilience of the spring 500, the limiting ring 600 can respectively keep abutting against the main body portion 320 and the annular block 400, and the limiting ring 600 is located on the moving path of the pressing portion 310, so that the pressing portion 310 can drive the limiting ring 600 to move downward. At least two clamping blocks 610 are annularly arranged on the outer peripheral surface of the limiting ring 600, the clamping blocks 610 are used for clamping with the accommodating groove 411, the number of the accommodating groove groups 410 is an integral multiple of the number of the clamping blocks 610, in this embodiment, the number of the accommodating groove groups 410 is one time of the number of the clamping blocks 610, and the number of the accommodating groove groups 410 can be eight; the upper end of each clamping block 610 is provided with a second inclined surface 611, the upper limits of all the second inclined surfaces 611 are located on the same horizontal plane, the second inclined surfaces 611 are matched with the first inclined surfaces 421 of the annular block 400, that is, the second inclined surfaces 611 can slide on the first inclined surfaces 421 adaptively under the effect of the resilience force of the spring 500. In addition, in order to avoid the interference between the first inclined surfaces 421 and the second inclined surfaces 611, the lower limit of all the first inclined surfaces 421 is located on the same horizontal plane.

As shown in fig. 2 and 3, the retainer ring 600 is pushed upwards by the resilience of the spring 500 to abut against the annular block 400, and all the clamping blocks 610 of the retainer ring 600 are clamped in the deepest accommodating groove 411 of the annular block 400, so that the retainer ring 600 is at the narrowing gear height at this time, and the upper and lower positions of the main body 320 are limited by the upper and lower positions of the retainer ring 600, so that the needle withdrawing module 300 is also at the narrowing gear height, and all the needles 332 do not extend out of the corresponding protective sleeves 221 at this time, that is, the injection needle 10 is in the non-needle withdrawing state. As shown in fig. 6, 7 and 9, when the pressing portion 310 is pressed downward, the pressing portion 310 drives the entire needle discharging module 300 and the limiting ring 600 to move downward, so that all the clamping blocks 610 of the limiting ring 600 are separated from the receiving slots 411 of the annular block 400, at this time, under the resilient force of the spring 500, the second inclined surfaces 611 of the clamping blocks 610 can slide on the first inclined surfaces 421 of the annular block 400, so that the second inclined surfaces 611 of the clamping blocks 610 have a tendency to slide to the next receiving slot 411, and at this time, the injection needle 10 is in a pressed state; when the external force on the pressing portion 310 is removed, the pressing portion 310 no longer limits the position of the clamping block 610, the second inclined surface 611 of the clamping block 610 slides to the next accommodating groove 411 in a smooth manner under the action of the resilient force, and the self-rotation of the limiting ring 600 is realized, when all the clamping blocks 610 are clamped in the second deep accommodating groove 411 of the ring block 400, the limiting ring 600 is at the short needle outlet gear height, and the upper and lower positions of the main body portion 320 are limited by the upper and lower positions of the limiting ring 600, so the needle outlet module 300 is also at the short needle outlet gear height, at this time, all the needle heads 332 extend out of the corresponding protective sleeves 221, that is, the injection needle head 10 is in the needle outlet state; based on this, the above actions are repeated three times, and finally the needle withdrawing module 300 can be sequentially located at the middle needle withdrawing gear height, the long needle withdrawing gear height and the needle retracting gear height. It should be noted that, after the needle 332 is withdrawn, since the main body 320 and the annular block 400 are in limit abutment by the limit ring 600, and the main body 320 and the needle withdrawing part 330 can move together, the upward pressure applied to the needle 332 during the injection is finally transmitted to the upper cover 100, and thus it can be seen that the spring 500 is not affected by the injection pressure of the needle 332.

As shown in fig. 5 to 7, in some embodiments of the present invention, in order to prevent the pressing portion 310 from rotating when pressed downward, a plurality of rotation stopping grooves 430 are formed on an inner side wall of the ring block 400, each rotation stopping groove 430 is located between every two adjacent sub-groove portions 420, a plurality of rotation stopping blocks 311 are formed on an outer side wall of the pressing portion 310, and the rotation stopping blocks 311 are movably connected to the rotation stopping grooves 430 up and down. Since the ring block 400 and the upper cover 100 do not rotate relatively and the upper cover 100 and the lower cover 200 do not rotate relatively, the pressing portion 310 can be connected to the ring block 400 in a vertically movable manner while being prevented from rotating relatively. Meanwhile, in order to facilitate the self-rotation of the stop collar 600, the pressing portion 310 may be a solid of revolution, the lower end of the pressing portion 310 is provided with an annular saw tooth 312, the annular saw tooth 312 is located inside the receiving groove 411, the moving path of the annular saw tooth 312 intersects with the second inclined surface 611 of the stop collar 600, so that the annular saw tooth 312 can abut against the second inclined surface 611 of the stop collar 600, the annular saw tooth 312 is provided with a third inclined surface 3121 corresponding to the first inclined surface 421, that is, all the third inclined surfaces 3121 are directly opposite to all the second inclined surfaces 611 in and out, and the second inclined surfaces 611 and the third inclined surfaces 3121 are matched with each other, that is, the second inclined surfaces 611 can slide on the third inclined surfaces 3121 adaptively under the effect of the resilient force of the spring 500. Since the annular saw teeth 312 can abut against the second inclined surface 611 of the stop collar 600, when the pressing portion 310 moves downward, it can drive the stop collar 600 to move downward, and since the third inclined surface 3121 is located inside the first inclined surface 421, the third inclined surface 3121 can facilitate the self-rotation of the stop collar 600.

As shown in fig. 2 and 3, in some embodiments of the present invention, the shape of the receiving groove 411 matches with the second slope 611 to stabilize the clamping.

As shown in fig. 4 and 9, in some embodiments of the present invention, a negative pressure pipe 700 is connected to the lower cover 200, the negative pressure pipe 700 is used to connect a vacuum pump, and the negative pressure pipe 700 is communicated with the lower cavity 202 of the lower cover 200. When injecting, the individual's skin can be absorbed on the lower cover 200 under the action of the negative pressure tube 700 to solve the technical problem of inconvenient injection due to the elasticity of the skin.

As shown in fig. 10, the injection hand tool according to the second aspect embodiment of the present invention includes the injection needle 10 according to the first aspect embodiment of the present invention, and further includes a syringe 20 and a pushing device 30, wherein the syringe 20 is connected to the pressing portion 310 of the injection needle 10, so that the interior of the syringe 20 can communicate with the accommodating cavity 301 of the needle discharging module 300, and the pushing device 30 is specifically a screw rod slider mechanism, and is configured to push the piston 21 of the syringe 20, so that the medical fluid in the syringe 20 can be pushed to the needle discharging module 300 and finally flow out from the needle 332. Since the injection handpiece adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and detailed description is omitted.

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 (10)

1. An injection needle, comprising:

the inner top surface of the upper cover is provided with a downwardly extending annular block, the bottom surface of the annular block is annularly provided with a plurality of accommodating groove groups, each accommodating groove group comprises at least two accommodating grooves with sequentially increasing depths, and the accommodating grooves in each accommodating groove group are uniformly configured; a groove dividing part is arranged between every two adjacent accommodating grooves, a first inclined plane is arranged at the lower end of each groove dividing part, and all the first inclined planes are arranged towards the same direction;

the lower cover is connected with the upper cover, a horizontally arranged partition plate is arranged in the lower cover, and the partition plate is provided with a plurality of pin holes;

the needle outlet module comprises a pressing part, a main body part and a needle outlet part which are connected from top to bottom, the pressing part, the main body part and the needle outlet part are respectively provided with accommodating cavities which can be mutually communicated, the main body part is elastically connected between the partition plate and the annular block from top to bottom, the resilience direction of the main body part is upward, the pressing part penetrates through the annular block and extends upwards to the outside of the upper cover, a communicating pipe is hermetically connected between the main body part and the pressing part, the needle outlet part comprises a plurality of needle heads, and the needle heads and the needle outlet holes are arranged in a one-to-one correspondence manner;

the limiting ring is positioned between the main body part and the annular blocks and positioned on a moving path of the pressing part, at least two clamping blocks are annularly distributed on the outer peripheral surface of the limiting ring and used for clamping with the accommodating groove, and the number of the accommodating groove groups is integral multiple of the number of the clamping blocks; the upper end of each clamping block is provided with a second inclined plane, the upper limit of each second inclined plane is positioned on the same horizontal plane, and the second inclined planes are matched with the first inclined planes.

2. The needle of claim 1, wherein: a plurality of anti-rotation grooves are formed in the inner side wall of the annular block, a plurality of anti-rotation blocks are arranged on the outer side wall of the pressing portion, and the anti-rotation blocks are movably connected to the anti-rotation grooves from top to bottom.

3. The needle of claim 2, wherein: the pressing part is a rotating body, the lower end of the pressing part is provided with an annular sawtooth, the moving path of the annular sawtooth is intersected with the second inclined plane of the limiting ring, the annular sawtooth is provided with a third inclined plane corresponding to the first inclined plane, and the second inclined plane is matched with the third inclined plane.

4. The needle of claim 1, wherein: the lower limit positions of all the first inclined planes are on the same horizontal plane.

5. The needle of claim 1, wherein: the shape of the accommodating groove is matched with that of the second inclined plane.

6. The needle of claim 1, wherein: every go out the pinhole all to be equipped with downwardly extending's protective sheath, go out needle portion still includes a plurality of needle cover, and all needle covers all connect in the lower bottom surface of main part, every the needle cover all is connected with one the syringe needle, needle cover with the protective sheath one-to-one sets up.

7. Injection needle according to claim 1 or 6, characterized in that: the number of the needle outlets and the number of the needles are nine, and all the needle outlets and all the needles are distributed in a matrix manner.

8. The needle of claim 1, wherein: the spring that the baffle with be equipped with a plurality of from top to bottom sets up between the main part, the resilience direction of spring is up.

9. The needle of claim 1, wherein: the inner cavity of the lower cover is divided into an upper cavity and a lower cavity by the partition plate, the lower cover is connected with a negative pressure pipe, and the negative pressure pipe is communicated with the lower cavity.

10. Injection handpiece, characterized in that it comprises an injection needle according to any one of claims 1 to 9, and further comprises: the syringe is connected with the injection needle, and the pushing device is used for pushing the piston of the syringe.

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