阅读说明：本技术 一种用于微整形具有自动避让血管功能的美容钝针 (A dull needle of cosmetic for declining plastic has automatic blood vessel function of dodging ) 是由 赵晓培 张娟丽 李伟甲 孟兵涛 杨会 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种用于微整形具有自动避让血管功能的美容钝针,包括密封套装在注射筒排液头上的针座,还包括偏心针头,偏心针头的尾端匹配安装在针座内,并通过针座与排液头的排液口密封连通；所述针座包括连接座和转动回缩装置,所述连接座尾端匹配套装在排液头上,且连接座前端中部沿轴向开有与排液头连通的过渡通道；所述转动回缩装置包括外套壳和回缩控制机构；本发明结构独特,使用方便,不仅能够在进针过程中自动避让血管,有效的解决了现有钝针在使用时容易刺破组织内血管的问题；而且本发明所提供的美容钝针采用分体式组装设计,便于各部件的加工生产。(The invention discloses a cosmetic blunt needle with an automatic blood vessel avoiding function for micro-plastic, which comprises a needle seat and an eccentric needle head, wherein the needle seat is installed on a liquid discharge head of an injection tube in a sealing manner; the needle seat comprises a connecting seat and a rotary retraction device, the tail end of the connecting seat is sleeved on the liquid discharge head in a matching manner, and the middle part of the front end of the connecting seat is provided with a transition channel communicated with the liquid discharge head along the axial direction; the rotary retraction device comprises an outer casing and a retraction control mechanism; the invention has unique structure and convenient use, can automatically avoid blood vessels in the process of needle insertion, and effectively solves the problem that the conventional blunt needle is easy to puncture blood vessels in tissues when in use; moreover, the cosmetic blunt needle provided by the invention adopts a split type assembly design, and is convenient for processing and producing each part.)

1. A cosmetic blunt needle with automatic blood vessel avoiding function for micro-plastic comprises a needle seat which is mounted on a liquid discharge head of an injection tube in a sealing manner, and is characterized by also comprising an eccentric needle head, wherein the tail end of the eccentric needle head is mounted in the needle seat in a matching manner and is communicated with a liquid discharge port of the liquid discharge head in a sealing manner through the needle seat; the needle seat comprises a connecting seat and a rotary retraction device, the tail end of the connecting seat is sleeved on the liquid discharge head in a matching manner, and the middle part of the front end of the connecting seat is provided with a transition channel communicated with the liquid discharge head along the axial direction; the rotary retraction device comprises an outer casing and a retraction control mechanism, the tail end of the outer casing is matched and installed at the front end of the connecting seat, a cylindrical installation cavity is transversely arranged in the outer casing, and the installation cavity and the transition channel are coaxially arranged and are communicated with each other; the middle part of the front cavity wall of the mounting cavity is axially provided with a needle penetrating hole communicated with the outside, the tail end of the eccentric needle head is sleeved in the needle penetrating hole in a matching manner, and the tail end of the eccentric needle head penetrates through the mounting cavity to be hermetically inserted into the transition channel of the connecting seat and can rotate and slide along the inner wall of the transition channel; the retraction control mechanism is arranged in the mounting cavity and comprises a front toothed column, a rear toothed column and a top bracing torsion spring, and the front toothed column is rotatably sleeved on the eccentric needle head and can drive the eccentric needle head to axially slide along the mounting cavity; a plurality of arc right-angle driving teeth are arranged on the rear end face of the front tooth column along the circumference, acute-angle tooth tips of the driving teeth are arranged outwards along the axial direction, and the rear tooth column is sleeved on an eccentric needle head on the rear side of the front tooth column in a sliding mode at intervals and can drive the eccentric needle head to rotate synchronously; the terminal surface of back reference point orientation front reference point is equipped with a plurality ofly along the circumference and drives reference point assorted arc right angle form and rotate tooth, rotates tooth quantity and drive tooth quantity the same, prop the torsional spring cover and establish on the eccentric syringe needle of back reference point, two around the back of propping the torsional spring respectively with adjacent front reference point and connecting seat fixed connection, and prop the torsional spring under free state and can push up the sharp cusp that the front reference point ordered about rotation tooth and the cusp meshing that corresponds drive tooth.

2. The blunt beauty needle with automatic blood vessel avoiding function for micro-plastic as claimed in claim 1, wherein the middle of the front tooth post is axially opened with a mounting hole, a shaft sleeve is arranged in the mounting hole and is rotatably sleeved on the eccentric needle head in the mounting cavity through the shaft sleeve, the outer ring surface of the front tooth post is in sliding contact with the annular inner cavity wall of the mounting cavity 411, the outer ring surface of one side of the acute-angle tooth tip of the driving tooth is axially opened with a limit chute extending to the front tooth post, a limit guide rail is fittingly mounted in the limit chute, and the limit guide rail radially protrudes out of the limit chute and is fixedly connected with the inner ring wall of the mounting cavity on the adjacent side.

3. The cosmetic blunt needle with the function of automatically avoiding blood vessels for micro-plastic surgery as claimed in claim 2, wherein the eccentric needles on the front and back sides of the front tooth column are provided with snap springs in a matching way for further limiting the axial position of the front tooth column on the eccentric needle in the installation cavity.

4. The cosmetic blunt needle with the function of automatically avoiding blood vessels for micro-plastic according to claim 1, wherein a threaded connection hole is axially formed in the middle of the front end face of the connection seat, the threaded connection hole and the transition channel are coaxially arranged, the front port of the transition channel is positioned at the hole bottom of the threaded connection hole, and the tail end of the outer casing is fittingly installed in the threaded connection hole.

5. The cosmetic blunt needle with the function of automatically avoiding blood vessels for micro-plastic according to claim 4, wherein the outer casing comprises a tubular casing body with two central control ends being ports and a casing cover, a cylindrical cavity inside the tubular casing body is an installation cavity, the circumferential side wall of the tubular casing body is provided with external threads matched with the internal threads of the threaded connection hole, the casing cover is in threaded connection with the front end of the tubular casing body and seals the front port of the tubular casing body, and the middle part of the casing cover on the front side of the installation cavity is provided with a needle through hole axially communicated with the outside.

6. The blunt beauty needle with automatic blood vessel avoiding function for micro-plastic according to claim 1, wherein the eccentric needle comprises a needle stem, the tail end of the needle stem is fittingly sleeved in the needle hole, the tail end of the needle stem passes through the mounting cavity and is hermetically inserted into the transition channel of the connecting seat, the top end of the needle stem is provided with a spherical needle point in a sealing manner, the circumferential side wall of the needle stem at the rear side of the spherical needle point is radially provided with a liquid outlet communicated with the inside, and the spherical needle point and the needle stem are eccentrically arranged.

7. The blunt beauty needle with automatic blood vessel avoiding function for micro-plastic surgery as claimed in claim 6, wherein three liquid outlets are provided on the circumferential side wall of the needle stem at the rear side of the spherical needle tip at intervals along the circumference, and the three liquid outlets are arranged at intervals along the axial direction.

8. The cosmetic blunt needle with the function of automatically avoiding blood vessels for micro-plastic according to claim 1, wherein the tail end of the connecting seat is provided with a fixing groove matched with the liquid discharge head along the axial direction, and the fixing groove is matched, sealed and nested on the liquid discharge head.

9. The cosmetic blunt needle with the function of automatically avoiding blood vessels for micro-plastic according to claim 8, wherein the inner ring arm of the fixing groove is circumferentially provided with an annular groove and is fittingly provided with a sealing ring, and when the connecting seat is fittingly nested on the liquid discharge head, the sealing ring in the fixing groove is deformed by the extrusion of the connecting seat and the liquid discharge head.

10. The cosmetic blunt needle with an automatic blood vessel avoiding function for micro-plastic according to claim 1, wherein a sealing member is fittingly provided in the front end of the transition passage of the connecting seat, the tail end of the eccentric needle is fittingly inserted into the fixed passage through the sealing member, and the sealing member can enhance the sealing strength between the outer circumferential surface of the eccentric needle and the inner circumferential arm of the transition passage without affecting the rotation and sliding of the tail end of the eccentric needle in the transition passage.

Technical Field

The invention belongs to the technical field of medical cosmetology, and particularly relates to a cosmetic blunt needle with an automatic blood vessel avoiding function for micro-plastic surgery.

Background

Common items such as puncture, injection and the like cannot be separated in the medical cosmetic and cosmetology, such as clinical venipuncture, shaped fat autograft, hyaluronic acid injection, wrinkle removal and the like; the needles and devices for extraction and injection are different, and the damage to cells and medicines is also different; the traditional sharp needle is easy to damage cells, blood vessels, nerves and fibrous structures by extraction and injection, and is easy to cause blood stasis and swelling after operation. In addition, the sharp needle has short length and limited injection range, and can not inject deeper parts, thereby bringing technical limitation; the blunt needle is longer than the sharp needle, can reach 5-10cm, can reach a deeper position for injection or extraction, has relatively simple hierarchical control, has less strict operation requirements on medical care personnel, and has been widely accepted in the medical and cosmetic industries in recent years.

Along with the requirement that the human being constantly pursues and is higher and higher to the beauty, the accurate high efficiency of scar wound and cosmetic plastic of clinical postoperative becomes the problem that awaits the solution urgently, current blunt needle is in the use, although fat is softer in the tissue, and because blunt needle top is blunt circular, can smoothly move ahead in the tissue, nevertheless because the blood vessel is like netted in the human body, everywhere is not in, and the blood vessel has certain rigidity, thereby if when blunt needle syringe needle top bumps the blood vessel, if still force to send the needle inwards, the needle top then can pierce through the blood vessel, cause the inside hemorrhage of tissue to cause puncture area bruise and swelling, some filler can get into the intravascular embolism that leads to the fact even, influence health.

Disclosure of Invention

Aiming at the defects and problems of the existing blunt needle, the invention provides a cosmetic blunt needle with the function of automatically avoiding blood vessels for micro-plastic, which has unique structure and convenient use, not only can automatically avoid the blood vessels in the process of needle insertion, but also effectively solves the problem that the existing blunt needle is easy to puncture the blood vessels in tissues when in use; moreover, the cosmetic blunt needle provided by the invention adopts a split type assembly design, and is convenient for processing and producing each part.

The technical scheme adopted by the invention for solving the technical problems is as follows: a cosmetic blunt needle with automatic blood vessel avoiding function for micro-plastic comprises a needle seat which is mounted on a liquid discharge head of an injection tube in a sealing way, and also comprises an eccentric needle head, wherein the tail end of the eccentric needle head is mounted in the needle seat in a matching way and is communicated with a liquid discharge port of the liquid discharge head in a sealing way through the needle seat; the needle seat comprises a connecting seat and a rotary retraction device, the tail end of the connecting seat is sleeved on the liquid discharge head in a matching manner, and the middle part of the front end of the connecting seat is provided with a transition channel communicated with the liquid discharge head along the axial direction; the rotary retraction device comprises an outer casing and a retraction control mechanism, the tail end of the outer casing is matched and installed at the front end of the connecting seat, a cylindrical installation cavity is transversely arranged in the outer casing, and the installation cavity and the transition channel are coaxially arranged and are communicated with each other; the middle part of the front cavity wall of the mounting cavity is axially provided with a needle penetrating hole communicated with the outside, the tail end of the eccentric needle head is sleeved in the needle penetrating hole in a matching manner, and the tail end of the eccentric needle head penetrates through the mounting cavity to be hermetically inserted into the transition channel of the connecting seat and can rotate and slide along the inner wall of the transition channel; the retraction control mechanism is arranged in the mounting cavity and comprises a front toothed column, a rear toothed column and a top bracing torsion spring, and the front toothed column is rotatably sleeved on the eccentric needle head and can drive the eccentric needle head to axially slide along the mounting cavity; a plurality of arc right-angle driving teeth are arranged on the rear end face of the front tooth column along the circumference, acute-angle tooth tips of the driving teeth are arranged outwards along the axial direction, and the rear tooth column is sleeved on an eccentric needle head on the rear side of the front tooth column in a sliding mode at intervals and can drive the eccentric needle head to rotate synchronously; the terminal surface of back reference point orientation front reference point is equipped with a plurality ofly along the circumference and drives reference point assorted arc right angle form and rotate tooth, rotates tooth quantity and drive tooth quantity the same, prop the torsional spring cover and establish on the eccentric syringe needle of back reference point, two around the back of propping the torsional spring respectively with adjacent front reference point and connecting seat fixed connection, and prop the torsional spring under free state and can push up the sharp cusp that the front reference point ordered about rotation tooth and the cusp meshing that corresponds drive tooth.

The middle part of the front tooth column is provided with a mounting hole along the axial direction, a shaft sleeve is arranged in the mounting hole, the front tooth column is rotatably sleeved on an eccentric needle head in the mounting cavity through the shaft sleeve, the outer ring surface of the front tooth column is in sliding contact with the annular inner cavity wall of the mounting cavity 411, the outer ring surface of one side of the acute-angle tooth tip of the driving tooth is provided with a limiting sliding groove extending to the front tooth column along the axial direction, a limiting guide rail is installed in the limiting sliding groove in a matched mode, and the limiting guide rail protrudes out of the limiting sliding groove along the radial direction and is fixedly connected with the inner ring wall of the mounting cavity on the adjacent side.

The eccentric pinheads on the front side and the rear side of the front tooth column are provided with snap springs in a matching manner so as to further limit the axial position of the front tooth column on the eccentric pinhead in the mounting cavity.

The middle part of the front end face of the connecting seat is provided with a threaded connecting hole along the axial direction, the threaded connecting hole and the transition channel are coaxially arranged, one port of the transition channel is positioned at the bottom of the threaded connecting hole, and the tail end of the outer casing is installed in the threaded connecting hole in a matching mode.

The outer cover shell comprises a tubular shell body and a shell cover, the two ends of the outer cover shell are provided with openings, a cylindrical cavity inside the tubular shell body is an installation cavity, external threads matched with the internal threads of the threaded connection holes are arranged on the circumferential side wall of the tubular shell body, the shell cover is in threaded connection with the front end of the tubular shell body and used for plugging the front end opening of the tubular shell body, and a needle penetrating hole communicated with the outside is formed in the middle of the shell cover on the front side of the installation cavity in the axial direction.

The eccentric needle comprises a needle stem, the tail end of the needle stem is sleeved in the needle penetrating hole in a matching mode, the tail end of the needle stem penetrates through the mounting cavity and is inserted into the transition channel of the connecting seat in a sealing mode, the top end of the needle stem is provided with a spherical needle point in a sealing mode, a liquid outlet communicated with the inside of the needle stem is formed in the circumferential side wall of the needle stem on the rear side of the spherical needle point in the radial direction, and the spherical needle point and the needle stem are arranged eccentrically.

Three liquid outlets are formed in the circumferential side wall of the rear needle stem of the spherical needle point at intervals along the circumference, and the three liquid outlets are axially arranged at intervals.

The tail end of the connecting seat is axially provided with a fixing groove matched with the liquid discharge head, and the fixing groove is matched, sealed and nested on the liquid discharge head.

The inner ring arm of the fixing groove is provided with an annular groove along the circumference, and is provided with a sealing ring in a matching way, when the connecting seat is nested on the liquid discharge head in a matching way, the sealing ring in the fixing groove can be deformed by the extrusion of the connecting seat and the liquid discharge head.

The sealing piece is arranged in the front end of the connecting seat transition channel in a matched mode, the tail end of the eccentric needle head penetrates through the sealing piece to be inserted into the fixed channel in a matched mode, and the sealing piece can enhance the sealing strength between the outer ring surface of the eccentric needle head and the inner ring arm of the transition channel on the premise that the tail end of the eccentric needle head rotates and slides in the transition channel is not affected.

The invention has the beneficial effects that: the beauty blunt needle for micro-plastic with the function of automatically avoiding blood vessels, which is provided by the invention, has a unique structure and comprises a needle seat and an eccentric needle head, wherein the needle seat adopts a split type assembly design, and is convenient for processing, production and assembly; the needle stand includes connecting seat and rotation and contracts the device, the rotation contracts the device and is connected with the leakage fluid head of injection tube through the connecting seat, the rotation contracts the device and includes outer cover shell and contracts control mechanism, outer cover shell is connected with the connecting seat, be equipped with the column installation cavity in the outer cover shell, eccentric syringe needle includes the needle stalk, needle stalk tail end matching goes deep into the installation cavity, and pass the installation cavity and seal and insert in the transition passageway of connecting seat, needle stalk top shutoff is equipped with the ball needle point, radially open on the circumference lateral wall of ball needle point rear side needle stalk has the liquid outlet with inside intercommunication, and ball needle point and needle stalk eccentric settings, it sets up in the installation cavity to contract control mechanism.

When the eccentric needle head is held by a hand in the using process, the eccentric needle head can be controlled to penetrate into tissues to perform suction operation, in the penetrating process, the needle point at the top end of the eccentric needle head is spherical, so that the eccentric needle head can smoothly shuttle in the tissues, when the spherical needle point at the top end of the eccentric needle head is contacted with blood vessels in the tissues in the penetrating process, the resistance force of the eccentric needle head penetrating into the tissues can be increased, the eccentric needle head is continuously pushed into the tissues through the injection tube to drive the front toothed column to slide backwards along the limiting track and drive the rear toothed column to drive the needle stem to rotate, when the needle stem rotates, the spherical needle point contacted with the blood vessels in the tissues can rotate around the needle stem central shaft along with the needle stem, so that the spherical needle head is separated from the contacted blood vessels, the purpose of automatically avoiding the blood vessels in the tissues is realized, after the eccentric needle head avoids the blood vessels, the resistance force can be reduced, so that the jacking torsion spring can reversely twist and reset, the rear tooth post is driven to drive the rotating tooth to reversely rotate and reset, in the process, the rotating tooth which reversely rotates can drive the driving tooth to slide along the bevel edge end face of the rotating tooth, the front tooth post is driven to drive the retracted needle stalk to outwardly extend and reset, when the eccentric needle head continuously penetrates into the tissue to meet the blood vessel again, the retraction control mechanism can repeat the process to continuously drive the needle stalk to rotate at a fixed angle and in a fixed direction, so that the eccentric needle head can automatically avoid the blood vessel in the tissue when penetrating into the tissue, the blood vessel in the tissue cannot be punctured, the use is convenient, and the problem that the blood vessel in the tissue is easily punctured by the conventional blunt needle when in use is effectively solved.

The invention provides a cosmetic blunt needle for micro-plastic, which has unique structure and convenient use, can automatically avoid blood vessels in the needle insertion process, and effectively solves the problem that the existing blunt needle is easy to puncture blood vessels in tissues when in use; moreover, the cosmetic blunt needle provided by the invention adopts a split type assembly design, and is convenient for processing and producing each part.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

Fig. 3 is a schematic view of the connecting seat structure of the present invention.

FIG. 4 is a schematic view of the rotary retractor of the present invention.

Fig. 5 is a solid view of the internal structure of the tubular housing of the present invention.

FIG. 6 is a schematic diagram of the relationship between the positions of the front and rear tooth posts.

Fig. 7 is a schematic perspective view of the rear tooth post of the present invention.

FIG. 8 is a schematic view showing the connection relationship between the rear tooth post and the needle stem.

FIG. 9 is a schematic diagram of the position of the limiting key according to the present invention.

Fig. 10 is a perspective view of the front tooth post of the present invention.

FIG. 11 is a schematic view showing the connection between the front tooth post and the needle stem.

FIG. 12 is a schematic view of the needle stem retraction process of the present invention.

Fig. 13 is a schematic view of the structure of the limit track of the present invention.

Fig. 14 is a schematic view of the mounting position of the spring seat of the present invention.

FIG. 15 is an expanded view of the position relationship between the driving teeth and the limit track according to the present invention.

FIG. 16 is a second schematic view of the needle stem retraction process of the present invention.

FIG. 17 is a schematic view of the position of the outlet of the eccentric needle of the present invention.

FIG. 18 is a schematic view of the friction adjusting member of the present invention

Fig. 19 is an enlarged schematic view of the structure at B in fig. 19.

Reference numbers in the figures: the device comprises a syringe 1, a liquid discharge head 11, a needle base 2, a connecting base 3, a fixing groove 31, a transition passage 32, a threaded connecting hole 33, a rotary retraction device 4, a tubular shell 401, a shell cover 402, a mounting cavity 411, a needle penetrating hole 412, a front tooth column 42, a driving tooth 421, a limiting sliding groove 422, a rear tooth column 43, a sliding sleeve 431, a limiting key 432, a rotating tooth 433, a top support torsion spring 44, a return spring 45, a limiting track 47, a spring seat 48, an eccentric needle 5, a needle stem 51, a spherical needle tip 52, a liquid outlet 53, a friction adjusting part 6, a sliding sleeve 61, an extrusion seam 611, a locking sleeve 62, a threaded sleeve 63, a guide block 64 and a compression ring 65.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

Example 1

In the use process of the existing blunt needle, although fat in the tissue is soft, and the top end of the blunt needle is blunt round and can smoothly move forward in the tissue, the blood vessel is like a net in the human body, everywhere is not located, and the blood vessel has certain rigidity, so that if the top end of the needle head of the blunt needle touches the blood vessel, if the needle head still forcibly sends the needle inwards, the top end of the needle head can pierce the blood vessel, so that bleeding in the tissue causes bruise and swelling in a puncture area, even some fillers can enter the blood vessel to cause embolism, and health is influenced; and the top end of the existing blunt needle is provided with a liquid outlet, when extraction or injection is carried out, the single extraction amount or the injection amount is less, and large-area extraction or injection can be completed only by inserting the needle for many times, thereby further aggravating postoperative wound of a patient.

To above-mentioned problem, this embodiment provides a cosmetic blunt needle that is used for little plastic to have an automatic blood vessel function of dodging, and the needle point of this cosmetic blunt needle syringe needle is eccentric settings, and when the eccentric syringe needle gos deep into the tissue, runs into the blood vessel when smooth antedisplacement in fat and deepens the resistance increase, cosmetic blunt needle syringe needle can automatic directional rotation retract to dodge for adjusting the needle point position and hinder the blood vessel, and dodge and hinder automatic extension reset behind the blood vessel, concrete structure as follows:

as shown in fig. 1-12, a cosmetic blunt needle for micro-plastic comprises a needle base 2 hermetically mounted on a liquid discharge head 11 of an injection tube 1, and further comprises an eccentric needle 5, wherein the eccentric needle 5 comprises a needle stem 51, the top end of the needle stem 51 is provided with a spherical needle point 52 in a sealing manner, a liquid outlet 53 communicated with the inside is radially arranged on the circumferential side wall of the needle stem 51 at the rear side of the spherical needle point 52, and the spherical needle point and the needle stem are eccentrically arranged; the tail end of the needle stem 51 is arranged in the needle seat in a matching way and is communicated with the liquid outlet of the liquid discharging head in a sealing way through the needle seat, so that when a piston in the injection tube 1 is pushed, an injection in the injection tube can enter the needle stem through the needle head seat 2 and is discharged from the liquid outlet; the needle point at the top end of the eccentric needle is spherical, so that the eccentric needle can smoothly shuttle in tissues.

The needle base 2 comprises a connecting base 3 and a rotation driving device 4, the connecting base 3 is in a horizontal columnar shape, a fixing groove 31 matched with the liquid discharge head 5 is formed in the tail end of the connecting base 3 along the axial direction and is embedded on the liquid discharge head in a matching and sealing mode, and a columnar transition passage 32 communicated with the liquid discharge head is formed in the middle of the front end of the connecting base 3 along the axial direction; furthermore, the inner ring arm of fixed slot is gone up to open along the circumference has the ring channel to the matching installs the sealing washer, after the connecting seat matches nestification on the flowing back head, the sealing washer in the fixed slot can receive the extrusion of connecting seat and flowing back head to produce deformation, thereby further strengthens the leakproofness between connecting seat 3 and the flowing back head.

Rotation drive arrangement 4 includes that outer shell 41 and retraction control mechanism, and the front end at the connecting seat is installed in the matching of outer shell 41 tail end, and is equipped with the column installation cavity along transversely in the outer shell, and the installation cavity sets up with the axle center with the transition passageway to communicate each other, and the diameter size of installation cavity is greater than the diameter size of excessive passageway, and outer shell 41 has the multiple with the connected mode of connecting seat, for example: threaded connection hole is opened along the axial in the middle part of the preceding terminal surface of connecting seat 3, threaded connection hole and transition passageway 32 set up with the axle center, and a port of transition passageway 32 is located threaded connection hole's hole bottom, and outer jacket 41 tail end matching is installed in threaded connection hole, and outer jacket 41 is split type structure, including well accuse both ends for mouthful tubulose casing 401 and cap 402, the inside column cavity of tubulose casing 401 is installation cavity 411, be equipped with on the circumference lateral wall of tubulose casing 401 with threaded connection hole internal thread assorted external screw thread, cap and tubulose casing front end threaded connection to port shutoff before the tubulose casing, the cap middle part of installation cavity front side is opened along the axial has the needle hole 412 of wearing with outside intercommunication.

The tail end of the needle stem of the eccentric needle is sleeved in the needle penetration hole 412 in a matching manner, the tail end of the needle stem 51 penetrates through the mounting cavity and is inserted into the transition channel of the connecting seat in a sealing manner and can rotate and slide along the inner wall of the transition channel, and when the piston in the injection tube 1 is pushed, an injection in the injection tube can enter the needle stem through the needle head seat 2 and is discharged from a liquid outlet; furthermore, a sealing element is arranged in the front end of the transition channel 32 of the connecting seat 3 in a matching mode, the tail end of the eccentric needle head penetrates through the sealing element to be inserted into the fixed channel in a matching mode, and the sealing element can enhance the sealing strength between the outer annular surface of the eccentric needle head and the inner annular arm of the transition channel on the premise that the tail end of the eccentric needle head rotates and slides in the transition channel.

The retraction control mechanism is arranged in the installation cavity, when the resistance applied to the eccentric needle when the eccentric needle penetrates into tissues is increased, the retraction control mechanism can automatically drive the eccentric needle to retract towards the inner direction of the outer casing, a barrier is avoided, and after the barrier is avoided, the retraction control mechanism can control the eccentric needle to automatically extend and reversely rotate to reset.

As shown in fig. 4-11, the retraction control mechanism comprises a front toothed column 42, a rear toothed column 43 and a top bracing torsion spring 44, the front toothed column 42 is rotatably sleeved on the needle stem of the eccentric needle in the installation cavity 411 and can drive the eccentric needle to slide along the axial direction of the installation cavity, specifically: the middle part of the front tooth column is provided with a mounting hole along the axial direction, a shaft sleeve is arranged in the mounting hole and is rotatably sleeved on the needle stem 51 through the shaft sleeve, the outer ring surface of the front tooth column is in sliding contact with the annular inner cavity wall of the mounting cavity 411, and when the needle stem 51 slides in the mounting cavity along the axial direction, the front tooth column can be synchronously driven to synchronously slide in the mounting cavity 411; furthermore, snap springs are arranged on the needle stems on the front side and the rear side of the front tooth column 411 in a matching mode, and are used for further limiting the axial position of the front tooth column 411 on the needle stem 51.

3 arc right-angle-shaped driving teeth 421 are arranged on the rear end face of the front tooth column along the circumference, acute-angle tooth tips of the driving teeth 421 are arranged outwards along the axial direction, and the outer arc wall of the driving teeth 421 is in sliding contact with the inner cavity wall of the installation cavity; the outer arc wall of one side of the tooth tip of each driving tooth 421 is provided with a limiting sliding groove 422 extending to the front tooth column along the axial direction, a limiting guide rail 47 is installed in the limiting sliding groove 422 in a matched mode, the limiting guide rail 47 protrudes out of the limiting sliding groove along the radial direction and is fixedly connected with the inner annular wall of the installation cavity of the adjacent side, and when the needle stem 51 of the eccentric needle head is pushed and pulled outside, the needle stem 51 can drive the front tooth column to slide along the axial direction of the limiting guide rail 47 in the installation cavity.

The rear toothed column 43 is sleeved on the needle stem of the eccentric needle head at the rear side of the front toothed column 42 in a sliding manner at intervals and can drive the eccentric needle head to rotate synchronously; specifically, the method comprises the following steps:

a sliding sleeve 431 is fixedly sleeved on a true stem in the installation cavity at the rear side of the front toothed column, snap springs are arranged on the true stems at the front end and the rear end of the sliding sleeve 431 in a matching manner, the snap springs are used for limiting the axial position of the sliding sleeve 431, the snap springs protrude out of the sliding sleeve 431, an installation hole is formed in the middle of the rear toothed column along the axial direction, the middle of the rear toothed column is sleeved on the sliding sleeve 431 between the two snap springs in a sliding manner through a shaft sleeve, and the outer annular surface of the front toothed column is in sliding contact with the annular inner cavity wall of the installation cavity 411; a bar-shaped limiting key 432 is arranged between the shaft sleeve and the sliding sleeve 431 and is in key connection with the shaft sleeve, the rear tooth column 43 can slide back and forth on the sliding sleeve 431 along the limiting key 432 through the shaft sleeve, and when the rear tooth column rotates, the needle stem can be driven to rotate synchronously through the limiting key 432.

A plurality of arc right-angle rotating teeth 433 matched with the driving teeth are arranged on one end face, facing the front tooth column, of the rear tooth column 43 along the circumference, the outer arc faces of the rotating teeth 433 are in sliding contact with the wall of an inner ring cavity of the installation cavity, and the number of the rotating teeth is 3, which is the same as that of the driving teeth; the back supporting torsion spring is sleeved on the eccentric needle head of the back tooth column, the front and back of the back supporting torsion spring are respectively and fixedly connected with the adjacent front tooth column and the connecting seat, and the back supporting torsion spring can push the front tooth column to drive the acute-angle tooth point of the rotating tooth to be meshed with the acute-angle tooth point of the corresponding driving tooth in a free state, namely the bevel edge end surface at the tooth point of the rotating tooth is in abutting contact with the bevel edge end surface at the tooth point of the corresponding driving tooth; when the eccentric pinhead with the front tooth column slides backwards along the guide track and the inner cavity wall of the installation cavity, the driving teeth can move backwards to drive the rotating teeth engaged with the driving teeth to slide along the bevel edge end surfaces of the driving teeth, so that the engaging area between the driving teeth and the rotating teeth is increased, thereby driving the rear tooth column to drive the needle stem to rotate, in the process, because the rear end of the back supporting torsion spring is respectively and fixedly connected with the rear tooth column at the adjacent side and the hole bottom of the threaded connecting hole of the connecting seat, when the front tooth post pushes the rear tooth post to rotate, the back-supporting torsion spring is driven by the rotation torsion of the rear tooth post to generate torsion, and when the rear tooth post loses the pushing force, the back-supporting torsion spring reversely twists and resets, thereby order to order about back tooth post to drive and rotate tooth antiport and reset, this in-process, antiport's rotation tooth can order about drive tooth along rotating tooth hypotenuse terminal surface and to slide to order about preceding tooth post to drive the needle stalk that contracts and outwards extend and reset.

The cosmetic blunt needle for micro-plastic provided by the embodiment has a unique structure, adopts a split type assembly design, and is convenient to process, produce and use and assemble as the limiting track and the tubular shell of the outer sleeve shell are of an integrated structure; when in use, the assembled cosmetic blunt needle is matched and arranged on the liquid discharge head of the injection tube 1, and then the cosmetic blunt needle can be directly used.

When the eccentric needle head is held by a hand to control the eccentric needle head to penetrate into tissues to perform suction operation, and in the penetrating process, as the needle point at the top end of the eccentric needle head is spherical, the eccentric needle head can smoothly shuttle in the tissues, and when the spherical needle point at the top end of the eccentric needle head is contacted with blood vessels in the tissues in the penetrating process of the eccentric needle head, the resistance force applied to the penetration of the eccentric needle head is increased, the eccentric needle head is continuously pushed into the tissues through the injection tube to drive the front toothed column 42 to slide backwards along the limiting track and drive the rear toothed column to drive the needle stem to rotate, when the needle stem rotates, the spherical needle point contacted with the blood vessels in the tissues can rotate around the central shaft of the needle stem 51 to be separated from the contacted blood vessels, so that the purpose of automatically avoiding the blood vessels in the tissues is realized, and when the eccentric needle head avoids the blood vessels, the resistance force applied to the eccentric needle head can be reduced, so that the jacking torsion spring can reversely twist and reset, the rear tooth post is driven to drive the rotating tooth to reversely rotate and reset, in the process, the rotating tooth which reversely rotates can drive the driving tooth to slide along the bevel edge end face of the rotating tooth, the front tooth post is driven to drive the retracted needle stalk to outwardly extend and reset, when the eccentric needle head continuously penetrates into the tissue to meet the blood vessel again, the retraction control mechanism can repeat the process to continuously drive the needle stalk to rotate at a fixed angle and in a fixed direction, so that the eccentric needle head can automatically avoid the blood vessel in the tissue when penetrating into the tissue, the blood vessel in the tissue cannot be punctured, the use is convenient, and the problem that the blood vessel in the tissue is easily punctured by the conventional blunt needle when in use is effectively solved.

Example 2

Embodiment 2 differs from embodiment 3 in that, as shown in fig. 12 to 16, a spring seat 48 is coaxially and rotatably fixed to the rear ring end surface of the rear tooth post, and is used for fixing the top bracing torsion spring 44, and the spring seat 48 is provided in various ways, for example: the spring seat 48 is coaxially and rotatably embedded in the rear end face of the rear tooth post, one end of the top support torsion spring 48 is matched and fixed in the spring seat 48, the other end of the top support torsion spring 48 faces the rear side and is in top contact with the hole bottom of the threaded connecting hole 33, and the needle stem is positioned in the top support torsion spring 48; the tail ends of the limiting slide rails 47 in the limiting slide grooves 422 extend forwards along the axial direction to form the limiting slide grooves 422 and are in abutting contact with the bevel edge end faces of the adjacent rotating teeth, and the tail ends of the limiting rails 47 are provided with bevel chamfers matched with the bevel edge end faces of the driving teeth; the jacking spring 44 can push the inclined end face of the rotating tooth on the rear tooth column to rotationally slide along the top end of the strip-shaped track in a free state, so that the limiting track is in contact with the end face of the right-angled edge of the rotating tooth on the other side; still match on the preceding tooth post and be equipped with reset assembly, reset assembly can order about preceding tooth post under free state and contradict along spacing slide rail lapse and the installation cavity front chamber wall, makes the separation of the drive tooth on the preceding tooth post and the rotation tooth on the back tooth post, specifically:

reset assembly is including installing reset spring 45 in corresponding spacing spout respectively, reset spring's front and back both ends respectively with behind the spacing spout cell wall with deepen the guide rail tail end top in the spacing spout and touch together, reset spring 45 can push against preceding tooth post 42 and slide along installation cavity 411 inner wall and spacing track 47 forward under natural state, make preceding tooth post 42 and cap 402 top touch together, when the resistance increase that the eccentric syringe needle bore deep tissue received, the needle stalk of eccentric syringe needle can drive preceding tooth post 42 and slide along spacing track backward, make the needle stalk retract to the needle file internal, and when the eccentric syringe needle ordered about preceding tooth post 42 and slided along guide rail backward, reset spring 45 can receive the extrusion and produce compression deformation, thereby for preceding tooth post 42 slides along spacing track forward and provides the power that resets.

When the eccentric needle head is provided with the front tooth column and slides backwards along the guide rail and the inner cavity wall of the installation cavity, the tooth tops of the driving teeth on the front tooth column can be meshed with the tooth tops of the adjacent rotating teeth, the rotating teeth are pushed to slide backwards along the guide rail and are separated from the guide rail, in the process, the jacking torsion springs 44 and the reset springs 45 are extruded to generate compression deformation, after the guide rails of the rotating teeth are separated, the jacking springs in a compression state can push the rear tooth column forwards, the rotating teeth 433 are driven to slide along the bevel edge end faces of the tooth tops of the meshed driving teeth, the driving teeth and the rotating teeth are arc-shaped teeth arranged along the circumference, and therefore when the jacking springs push the rear tooth column to drive the rotating teeth 433 to slide along the bevel edge end faces of the tooth tops of the meshed driving teeth, the peduncle needle can be driven to rotate in a fixed angle and direction.

The cosmetic blunt needle for micro-plastic provided by the embodiment has a unique structure, adopts a split type assembly design, and is convenient to process, produce and use and assemble as the limiting track and the tubular shell of the outer sleeve shell are of an integrated structure; when in use, the assembled cosmetic blunt needle is matched and arranged on the liquid discharge head of the injection tube 1, and then the cosmetic blunt needle can be directly used.

In the using process, the eccentric needle head can be controlled to penetrate into tissues to perform suction operation by holding the injection tube by hands, in the penetrating process, as the needle point at the top end of the eccentric needle head is spherical, the eccentric needle head can smoothly shuttle in the tissues, in the penetrating process of the eccentric needle head, when the spherical needle point at the top end of the eccentric needle head is contacted with blood vessels in the tissues, the resistance force applied to the penetration of the eccentric needle head is increased, the eccentric needle head is continuously pushed into the tissues through the injection tube to cause a reset spring provided with an internal retraction control mechanism to generate compression deformation, so that the needle stalk of the eccentric needle head can drive the front tooth column 42 to slide backwards along the limiting track, the tooth point of the driving tooth on the front tooth column can be meshed with the tooth point of the adjacent rotating tooth, and the rotating tooth is pushed to slide backwards along the guiding track to be separated from the guiding track, so that the needle stalk retracts towards the needle base, when the rotating tooth guiding track is separated, the compressed jacking spring pushes the rear tooth post forwards to drive the rotating tooth 433 to slide along the bevel end face of the tooth top of the meshed driving tooth, and the driving tooth and the rotating tooth are both arc-shaped teeth arranged along the circumference, so that when the jacking spring pushes the rear tooth post to drive the rotating tooth 433 to slide along the bevel end face of the tooth top of the meshed driving tooth, the needle stem can be driven to rotate at a fixed angle and in a fixed direction, when the needle stem rotates, the spherical needle point contacted with the blood vessel in the tissue can rotate around the central shaft of the needle stem 51 along with the needle stem 51, so that the needle stem is separated from the contacted blood vessel, the purpose of automatically avoiding the blood vessel in the tissue is realized, when the eccentric needle head meets the blood vessel again in the process of continuously entering the tissue, the retraction control mechanism can repeat the process to continuously drive the needle stem to rotate at a fixed angle and in a fixed direction, so that the eccentric needle head can automatically avoid the blood vessel in the tissue when entering the tissue, the blunt needle has the advantages that the blood vessel in the tissue can not be punctured, the use is convenient, and the problem that the blood vessel in the tissue is easy to puncture when the blunt needle is used in the prior art is effectively solved; and when the needle stem is blocked by a blood vessel in the tissue in the deep process, the angle of the liquid outlet of the needle stem can be adjusted once, so that multidirectional injection or extraction can be realized, and the injection or extraction effect is improved.

Example 3

Embodiment 3 differs from embodiment 2 in that the front end of the rotary retraction device is provided with a friction adjustment member in a matching manner.

As shown in fig. 18-19, the front end of the rotary retraction device is provided with a friction adjustment component in a matching manner, the friction adjustment component comprises a sliding sleeve 61, a locking sleeve 62 and a threaded sleeve 63, the sliding sleeve is sleeved on the needle stem at the front side of the outer casing 41 in a matching manner, the tail end of the sliding sleeve is in contact with the casing cover at the front end of the outer casing, the inner annular surface of the sliding sleeve 61 is provided with a friction surface, the sliding sleeve 61 is provided with extrusion slits 611, the extrusion slits 611 are arranged along the radial direction and penetrate through the sliding sleeve, a trapezoidal guide block 64 is fixed on the sliding sleeve between every two extrusion slits, the trapezoidal guide blocks are arranged along the circumference, the inclined surfaces of the trapezoidal guide blocks are arranged forwards, the locking sleeve 62 is sleeved on the sliding sleeve in a coaxial manner, the guide block 64 is positioned in the locking sleeve 62, a conical pressing ring 65 is fixed in the locking sleeve at the front side of the guide block, the inclined surface of the pressing ring 65 is arranged towards the extrusion block and is in contact with the inclined surface of the extrusion block, the outer annular surface of the casing cover 402 of the outer casing is provided with external threads in a matching manner, the threaded sleeve 63 is sleeved on the external thread at the front end of the shell cover 402 in a matching way and can be screwed up in a forward and backward rotating and sliding way along the thread, the front end of the threaded sleeve extends forwards out of the shell cover 22 and is connected with the tail end of the locking sleeve, when the locking sleeve is driven to approach the rotary retraction device along the outer ring surface of the sliding sleeve by rotating the threaded sleeve, the inner pressing ring of the locking sleeve extrudes the guide block which is contacted with the inner pressing ring of the locking sleeve and extrudes the sliding sleeve inwards along the inclined surface of the guide ring, thereby adjusting the friction force between the sliding sleeve and the needle stem, compared with the embodiment 3, when the blunt needle provided by the embodiment is used, the friction force between the sliding sleeve and the needle stem can be adjusted through the needle stem sliding adjusting part according to the requirement, thereby adjust when eccentric syringe needle when deep into the tissue and can contract extrusion reset assembly to in the overcoat, thereby under the prerequisite of not changing reset assembly, realize adjusting eccentric syringe needle and can contract under what kind of pressure, increased blunt needle's suitability.

Furthermore, the sliding sleeve 61 behind the extrusion seam 611 is fixedly sleeved with a fastening sleeve, the inner annular surface of the fastening sleeve is attached to the outer annular surface of the sliding sleeve 61, the fastening sleeve is made of iron, the shape of the sliding sleeve 61 can be effectively limited, and the middle of the sliding sleeve 61 can be effectively prevented from being bent and deformed due to large stress when the pressing ring 65 applies pressure to the guide block 64, so that normal use is affected.

Example 4

Embodiment 4 differs from embodiment 3 in that three liquid outlets are provided in the needle stem behind the spherical needle tip.

As shown in fig. 17, three liquid outlets are formed in the circumferential side wall of the needle stem at the rear side of the spherical needle point at intervals along the circumference, the liquid outlets are shaped like semicircular arc openings, and the three liquid outlets are axially arranged at intervals, that is, are uniformly arranged along a spiral; the three liquid outlets 53 have different distances from the spherical needle point and are spirally and uniformly arranged, the arrangement mode can convey the injection to the injection part in a 360-degree all-around uniform manner, the three liquid outlets have uniform distances, large-area injection filling such as face and chest can be met, large-area injection can be completed under the condition of less needle insertion, and the operation efficiency is improved; and because the liquid outlet is in the shape of a semicircular arc opening, liquid outlet is slow and uniform, the damage to tissue cells can be reduced, the survival rate can be improved, and fat cell particles can be slowly sucked in, and can not be scratched to puncture fat cells and improve the survival rate of the fat particles when in micro-plastic autologous fat transplantation.

The foregoing has described the general principles, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, for example: the spring seat 48 is arranged at the hole bottom of the threaded connecting hole, so that the fixed connection between the back brace torsion spring and the hole bottom of the threaded connecting hole is converted into the rotary connection, and the back brace torsion spring cannot be twisted in the rotating process of the back tooth column; such changes and modifications are intended to be within the scope of the claimed invention.