CN219516388U - Conical ring-shrinking horn mouth hair follicle ring-taking drill bit - Google Patents

Abstract

The utility model discloses a conical ring-shrinking bell mouth hair follicle taking ring bit which comprises a cutter body, a ring bit, a blood-preventing baffle and a ring bit chuck, wherein the inside of the cutter body is in a conical hollow shape with a big upper part and a small lower part, the ring bit is fixedly connected to the bottom of the cutter body, the blood-preventing baffle is fixedly connected to the surface of the cutter body, the ring bit chuck is fixedly connected to the top of the surface of the cutter body, and the outer wall and the inner wall of the ring bit intersect at the foremost end of the cutter body to form a bell mouth cutting edge. The improved cone-shaped extraction head has enlarged inner cavity, and can reduce friction between the inner wall surface of the inner cavity and the upper tissue of hair follicle to reduce torsion of hair follicle and reduce the risk of hair follicle twisting.

Description

Conical ring-shrinking horn mouth hair follicle ring-taking drill bit

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a conical ring shrinking bell mouth hair follicle ring-taking drill bit.

Background

The operation of transplanting hair follicle of autologous belongs to the microscopic plastic surgery technique, this operation is to take out the healthy hair follicle tissue of occipital part after the doctor adopts the hair follicle to draw the drill bit, after the special separation hair follicle tissue, use the hair follicle to plant the apparatus to transplant hair follicle to the alopecia position, improve the appearance of alopecia and achieve the cosmetic effect. Healthy complete hair follicle extraction is the most critical surgical link for autologous hair follicle transplantation surgery, as each follicular unit may contain 1-4 hair follicles, and a smaller number of boreholes to obtain more healthy hair follicles is the pursuit goal of each surgeon. When a surgeon extracts hair follicles, a hair taking drill bit is arranged on a handle, a motor in the handle is connected with a power supply to start a drilling machine to enable the drill bit to rotate, then the drill bit is sleeved on the hair follicles to be pressed into scalp tissues, the drill bit is used for cutting the hair follicles and surrounding tissues, and then free hair follicles are clamped by using hair-plucking forceps and placed into a low-temperature preservation solution at 0-4 ℃, so that extraction of the hair follicles is achieved.

Also, since the surgeon only sees the portion of the hair shaft exposed outside the scalp during the operation of extracting the hair follicle, there are several shapes of the hair follicle tissue located under the scalp: (1) multiple hair follicles are concentrated in one follicular unit, (2) loose hair follicles are arranged, (3) hair follicles bent by congenital hair curls, and (4) hair follicles with excessive angulation of hair follicles. The body part of the hair taking drill bit adopted at present is of a cylindrical tubular structure, and the front end of the hair taking drill bit is provided with an annular sharp cutting edge. Therefore, when the trephine is used for extracting hair follicles, particularly when the trephine is used for extracting hair follicles, the trephine is particularly small-caliber trephine (with the diameter of 0.6-0.8 mm), various types of hair follicles are easily damaged, and the success rate of hair follicle extraction is low. The average hair follicle transection rate is 6.14% in general, and can reach 15-20% seriously. And the broken hair follicle remains in the scalp tissue, which can lead to complications of inflammatory subcutaneous cysts after surgery.

Since the hair resources of the patient are inherently very limited, surgeons often use a ring drill with a larger caliber (more than 1.0mm in diameter) when extracting hair follicles in order to reduce the hair follicle damage rate, but the large caliber drill has the disadvantage of increasing the wounds of donor areas, resulting in large skin loss, more bleeding, strong pain, slow healing, obvious post-operation scars and paresthesia (numbness, itching, burning pain). How to manufacture a hair ring taking drill bit with small caliber and low hair follicle damage rate is a problem which needs to be solved urgently at present.

Disclosure of Invention

The utility model aims to provide a conical ring-shrinking horn mouth hair follicle ring-taking drill bit, which can protect hair follicles, reduce the damage rate of hair follicles and reduce scalp wounds and postoperative scalp inflammation complications.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a tapered annular horn mouth hair follicle ring harvesting drill bit, comprising:

the cutter body is internally provided with a conical hollow shape with a large upper part and a small lower part;

the trephine tool bit is fixedly connected to the bottom of the tool body;

the surface of the cutter body is fixedly connected with a blood-proof baffle;

the surface top of the cutter body is fixedly connected with a trephine chuck.

Further, the outer wall and the inner wall of the trephine bit intersect at the forefront end of the cutter body to form a horn mouth cutting edge.

Further, the front end of the inner cavity of the trephine bit is in a horn mouth shape.

Further, the cutter wall thickness of the rest cutter bodies except the trephine cutter head part is consistent with 0.05mm.

Further, the outer diameter of the cutter wall is 0.7-1.0mm, the inner diameter of the cutter wall is 0.6-0.9mm, and the model corresponding to the thickness is convenient to select aiming at the hair with different thicknesses.

Further, the bottom of the trephine bit is provided with a trephine cutting edge.

Further, the surface of the ring-mounted cutter head is provided with a ring shrinkage.

Compared with the prior art, the utility model has the following beneficial effects:

1. the improved cone-shaped extraction head has enlarged inner cavity, and can reduce friction between the inner wall surface of the inner cavity and the upper tissue of hair follicle to reduce torsion of hair follicle and reduce the risk of hair follicle twisting.

2. The traditional trephine is very easy to be transversely cut off when the hair follicle and the skin are relatively large in angulation, and the hair follicle can be adsorbed by the suction effect of the horn trephine, so that the angulation part is kept in the enlarged conical drill cavity, and the hair follicle can not be cut off.

3. The conical ring shrinking bell mouth ensures the volume increase of the inner cavity and simultaneously the retraction of the outer wall of the sharp cutting edge at the front end, and compared with a straight cylinder outer bell mouth trephine with the same inner diameter, the outer diameter is reduced. During hair follicle extraction, the lost skin quantity can be obviously reduced by 15% -20%.

4. Because the small outer diameter blade structure of the conical ring-contracted horn mouth reduces the skin tissue which is cut sharply, the large enough inner cavity is ensured to protect the sucked hair follicle, the blocking of the trephine body cavity by the hair follicle tissue is reduced, the outer wall of the conical cutter body which is gradually thick upwards has blunt stretching effect on the skin, and a doctor can easily and easily pull the hair follicle by using hair-pulling forceps, so that the unhairing damage caused by forceful hair follicle pulling is reduced.

5. The frictional resistance between the inner wall of the straight trephine body and the hair follicle tissue impedes the ascent of the hair follicle, causing the bulb of the hair follicle to be crushed as the drill bit descends. Due to the adsorption effect of the horn mouth trephine, the transplanted hair follicle can be actively pulled into the drill bit cavity, so that the risk of hair bulb damage at the bottom of the extruded hair follicle is reduced.

6. Because the conical trephine cutter body has a blunt opening stretching effect on skin by a gradually upward thick structure, when the extraction trephine is removed, skin wounds can retract inwards elastically, scalp tissue loss is reduced, wound surfaces are small, bleeding is less, pain is light, wound healing is rapid, and complications of postoperative infection are reduced.

Drawings

FIG. 1 is a cross-sectional view of an elevation structure of the present utility model;

fig. 2 is a schematic elevational view of the present utility model.

In the figure: 1. a cutter body; 2. trephine bit; 3. a blood-preventing baffle; 4. a trephine chuck; 5. trephine cutting edge; 6. and (5) annular necking.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-2, a conical ring-shrinking bell mouth hair follicle ring drill bit comprises a cutter body 1, a ring drill bit 2, a blood-proof baffle 3 and a ring drill chuck 4, wherein the inside of the cutter body 1 is in a conical hollow shape with a large upper part and a small lower part, the ring drill bit 2 is fixedly connected to the bottom of the cutter body 1, the blood-proof baffle 3 is fixedly connected to the surface of the cutter body 1, and the ring drill chuck 4 is fixedly connected to the top of the surface of the cutter body 1.

In the concrete implementation, the outer wall and the inner wall of the trephine bit 2 are intersected at the forefront end of the bit body 1 to form a bell mouth cutting edge.

In the concrete implementation, the front end of the inner cavity of the trephine bit 2 is in a horn mouth shape.

In the specific implementation, the cutter wall thickness of the rest cutter bodies 1 except for the part of the trephine cutter head 2 is consistent with 0.05mm.

In the concrete implementation, the outer diameter of the cutter wall is 0.7-1.0mm, the inner diameter of the cutter wall is 0.6-0.9mm, and the model corresponding to the thickness is convenient to select aiming at the hair with different thickness.

In particular embodiments, the bottom of the trephine bit 2 is provided with trephine blades 5.

In particular embodiments, the surface of the ring cutter head 2 is provided with a ring constriction 6.

All parts in the utility model are universal standard parts or parts known by a person skilled in the art, the structure and principle of the parts are known by the person skilled in the art through technical manuals or known by conventional experimental methods, and standard parts used in the utility model file can be purchased from the market, all parts in the utility model file can be customized according to the description of the specification and the drawings, the specific connection modes of all parts adopt conventional means such as mature bolts, rivets and welding in the prior art, the machines, parts and equipment adopt conventional models in the prior art, the control modes are automatically controlled by a controller, a control circuit of the controller can be realized through simple programming by the person skilled in the art, the common sense in the art, and the utility model file is mainly used for protecting mechanical devices, so the utility model file does not explain the control modes and circuit connection in detail and does not make specific description here.

Working principle: in the operation process of extracting hair follicles by using the straight barrel type trephine cutter body, when the rotary trephine bit is pressed down into scalp tissues, friction resistance between hair follicle tissues and the inner wall of the straight barrel type trephine causes the hair follicles in the cavity to rotate together, a distal hair follicle part which is not cut off by skin tissues around the lower hair follicle is still in a relative fixed state, the upper hair follicle is twisted and damaged, the upper hair follicle is broken, the inner cavity of the improved cone-shaped extraction head is enlarged, friction between the surface of the inner wall of the cavity and the upper tissue of the hair follicle is reduced to the greatest extent, thereby reducing torsion of the twisted hair follicle, reducing the risk of hair follicle torsion. In the hair follicle extraction process, the lost skin quantity can obviously drop by 15% -20%, because the small outer diameter blade structure of the conical ring shrinkage horn reduces the skin tissue of sharp excision, the suction hair follicle is protected by the inner cavity which is large enough, the blocking of the trephine body cavity by the hair follicle tissue is reduced, the outer wall of the conical blade body which is gradually thick upwards has a blunt expansion stretching effect on the skin, a doctor pulls out the hair follicle by using a hair pulling forceps more easily, thereby the unhairing damage caused by pulling the hair follicle forcefully is reduced, the friction resistance between the inner wall of the straight cylinder trephine body and the hair follicle tissue hinders the rise of the hair follicle, and the bulb of the hair follicle is crushed when the drill bit descends. Because the adsorption of horn mouth trephine can initiatively draw into the drill bit chamber with the hair follicle that transplants to reduced the risk of squeezing the hair bulb damage of hair follicle bottom, because the upward thick structure of taper trephine cutter body gradually has blunt the stretching effect that struts to skin, when extracting the trephine and shifting out the back, skin wound can inwards elasticity retract, reduces scalp tissue and loses, and the surface of a wound is little, and the bleeding is little, painful light, wound healing is fast, reduce the complication of postoperative infection.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. A conical ring-shrinking horn mouth hair follicle ring harvesting drill bit, comprising:

the cutter body (1), wherein the inside of the cutter body (1) is in a conical hollow shape with big top and small bottom;

the trephine tool bit (2), the said trephine tool bit (2) is fixedly connected to the bottom of the cutter body (1);

the blood-proof baffle (3) is fixedly connected with the surface of the cutter body (1);

and the surface top of the cutter body (1) is fixedly connected with the trephine chuck (4).

2. The conical ring-shrinking horn mouth hair follicle ring-harvesting drill bit according to claim 1, wherein: the outer wall and the inner wall of the trephine tool bit (2) are intersected at the forefront end of the tool body (1) to form a bell mouth cutting edge.

3. The conical ring-shrinking horn mouth hair follicle ring-harvesting drill bit according to claim 1, wherein: the front end of the inner cavity of the trephine tool bit (2) is in a horn mouth shape.

4. The conical ring-shrinking horn mouth hair follicle ring-harvesting drill bit according to claim 1, wherein: the cutter wall thickness of the rest cutter bodies (1) except for the part of the trephine cutter head (2) is consistent with 0.05mm.

5. The conical ring-reduced horn mouth hair follicle ring-harvesting drill bit as in claim 4, wherein: the outer diameter of the cutter wall is 0.7-1.0mm, the inner diameter of the cutter wall is 0.6-0.9mm, and the cutter wall is convenient for selecting the types of corresponding thickness aiming at the hair with different thickness.

6. The conical ring-shrinking horn mouth hair follicle ring-harvesting drill bit according to claim 1, wherein: the bottom of the trephine tool bit (2) is provided with a trephine cutting edge (5).

7. The conical ring-shrinking horn mouth hair follicle ring-harvesting drill bit according to claim 1, wherein: the surface of the ring-mounted cutter head (2) is provided with a ring shrinkage opening (6).