JPS6157018B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a hair transplantation device for directly transplanting artificial hair onto human skin.

BACKGROUND OF THE INVENTION Recently, technology for directly transplanting artificial hair onto human skin has significantly developed, and with this, various improvements have been made to artificial hair and instruments for hair transplantation, and various proposals have been made.

For example, the shape of the hair root is ampoule-shaped (U.S. Pat. No. 4,024,315), arrowhead-shaped (Japanese Patent Publication No.
11744), a loop shape, and a knot formed by simply tying the ends of the hair.

In addition, as a hair transplantation device, as previously proposed by the present inventor, a hollow needle (Japanese Patent Publication No. 54-5343),
Air gun type hair transplanter (Special Publication No. 54-11744), hair transplant needle with a concave portion at the needle tip (Public Publication No. 52-43192), tweezers-like hair transplant needle (Public Publication No. 52-43193), forked needle (Utility Model Publication No. 53-30874) and various others have been developed.

As described above, in order to increase the retention rate of transplanted artificial hair, emphasis has been placed on research into the shape of the hair root that increases the pulling resistance and the development of hair transplant needles suitable for such artificial hair.

However, when hair is actually transplanted, the shape of the hair root is important in increasing the retention rate of artificial hair, but even more important is the degree of destruction of the epidermis and subcutaneous tissue during hair transplantation. It has been found that this has a significant influence on the retention rate.

That is, if the epidermis and subcutaneous tissue are significantly destroyed during hair transplantation, it will take time for the wound to recover, and the hair roots will move due to external forces before they are fixed, resulting in a significantly poor hair retention rate immediately after hair transplantation. In addition, if the period of instability is long, inflammation and suppuration are likely to occur, which further reduces the hair fixation rate.

Therefore, it is necessary to make the thickness of the hair transplant needle as thin as possible, and to devise the shape of the hair root and the shape of the hair transplant needle used in combination so that the wound area during hair transplantation is as small as possible.

By the way, the outer diameter of the thinnest conventional hair transplant needles is 0.3 mm for hollow needles, and 0.35 to 0.5 mm for bifurcated needles or similar needles.

This is because if the needle is made thinner than this, it will be difficult to insert artificial hair into the hollow needle, and if the hair transplant needle is made thinner than this, it will become difficult to insert the artificial hair into the hollow needle, and if the needle is forked, the waist of the hair transplant needle will bend when piercing the skin. , it becomes impossible to achieve that purpose.

Furthermore, if the thickness of the hair transplant needle is made too thin,
In the case of a hair transplant needle that connects artificial hair to the needle tip, such as a bifurcated needle, the process of connecting the hair becomes extremely difficult, which causes a reduction in the efficiency of the hair transplant surgery.

The purpose of the present invention is that even if the thickness of the hair transplant needle is made thinner,
To provide a hair transplantation device that maintains the required strength during hair transplantation and can easily perform the work of anchoring artificial hair to the needle tip.

That is, the present invention comprises a hair transplant needle having a notch on the side wall of its distal end for anchoring the hair roots of artificial hair, and an outer tube having a hollow hole with an inner diameter that is approximately the same as the outer diameter of the hair transplant needle. is slidably attached within the outer cylinder, and is structured so that the tip of the hair transplant needle protrudes from the tip of the outer cylinder by a distance necessary for penetrating into the skin and transplanting hair, and the hair transplant needle is inserted into the outer cylinder. When retracted, at least a part of the opening surface of the outer cylinder tip that connects to the opening edge of the notch at the tip of the hair transplant needle,
The present invention relates to a hair transplantation device configured to form a guide surface for the hair roots to be anchored.

In the present invention, in the above-mentioned hair transplantation device, in order to enable a special locking operation of the artificial hair described later, the notch provided at the tip of the hair transplantation needle is replaced by the U-shaped notch provided on the side wall of the tip of the hair transplantation needle. The opening surface at the tip of the outer cylinder is required to have a structure in which only half the circumference of the outer cylinder is cut out by a plane that slopes inward and a plane that includes the center line of the outer cylinder. This is a requirement.

When using this outer cylinder, the remaining side wall of the outer cylinder protects the needle tip of the hair transplant needle, and at the same time,
To further facilitate the operation of hooking a loop-shaped hair root part to a needle tip.

The shape of the U-shaped notch of the hair transplant needle is most preferably configured so that the opening becomes wider and narrower toward the inside in order to make it easier to receive the hair roots to be attached. The shape can be freely modified as long as it does not interfere with receiving the hair root, such as making the width the same as the depth or making the bottom square or round.

In the hair transplantation instrument of the present invention, the hair transplantation needle is housed in an outer cylinder so as to be slidable. A pusher having an enlarged diameter is fixed to the base of the flocking needle, and a spring is interposed between the outer cylinder and the pusher, which acts to constantly retract the flocking needle into the outer cylinder. ing.

As mentioned above, when the hair transplant needle is pulled into the outer cylinder and is in a stationary position, the opening at the tip of the outer cylinder has a guide surface that guides the artificial hair to the notch provided at the tip of the hair transplant needle to lock the artificial hair. Therefore, it is necessary to configure the outer cylinder and the flocking needle so that their relative positions in the circumferential direction do not displace. The simplest method is to cut out a flat part in the length direction on the side wall of the flocking needle or the presser fixed to it, or to provide a keyway and a protrusion that protrudes into the hollow hole of the outer cylinder. It is sufficient to mount it so that it can slide but not rotate together with the piece.

In the hair transplantation device of the present invention configured in this manner, the outer cylinder reinforces the strength of the hair transplantation needle during hair transplantation, so the thickness of the hair transplantation needle can be reduced to 0.2 to 0.25 mm, which is less than 2/3 of the conventional hair transplantation device. I can do it.

Examples will be explained with reference to the drawings.

In FIGS. 1 to 4, a hair transplant needle 1 has a U-shaped notch 11 on the side wall of its distal end, and a presser 3 is fixed to the base thereof by a screw 7. The flocking needle 1 is slidably inserted into a hollow hole 13 provided through an outer tube 2 and a grip portion 9 integrally connected thereto. The keyway 5 provided in the presser 3 fixed to the hair transplant needle 1 and the tip of the screw 6 protruding from the outside of the grip part 9 into the through hole 13 engage with each other to prevent the hair transplant needle 1 from rotating. In addition, the final position when the hair transplant needle 1 is retracted and the maximum distance when the needle tip is protruded are defined.

A spring 4 is interposed between the head 10 of the presser 3 and the grip 9, and the flocking needle 1 is always held in the outer cylinder 2.
A force is acting in the direction of retraction. Therefore,
In the stationary state, as shown in FIGS. 4 and 7, the slope 16' formed on the cut half of the opening of the tip of the outer cylinder 2 and the U of the side wall of the tip of the hair transplant needle 1
The sloping surface 16 of the character-shaped cut 11 coincides with the slanted surface 16 and serves as a guide surface for hooking the hair root portion 31 of the artificial hair 30.

The base of the tied artificial hair 30 is lightly fixed on the grip part 9 by the leaf spring 8.

FIG. 5 shows an enlarged view of the hair transplant needle 1 having a U-shaped notch 11 on the side wall of its tip and the corresponding outer cylinder 2. If the lower edge 16 of the opening of the shaped cut 11 is on the same plane as the opening surface 17 of the cut outer tube 2, this opening surface 17 will lock the loop-shaped hair root 31 to the cut 11. It acts as an information surface for people. At this time, the remaining outer circumference 18
This serves to protect the tip of the hair transplant needle 1 and prevent danger.

FIG. 6 shows a modification of the embodiment shown in FIG. 5, in which the opening surface 17 is cut off horizontally. Furthermore, an example is shown in which the U-shaped cut has approximately the same width at the entrance and at the back. However, as shown in the front view of FIG. 7, the inclined surface 16' of the outer cylinder 2
is flush with the lower inclined surface 16 of the U-shaped cut 11, and forms a guide surface for locking the loop-shaped hair root portion 31.

The artificial hair used in the present invention is shown in FIG.
As shown in FIG. 9, it is most suitable to have a loop-shaped hair root portion 31 by winding the tip of the artificial hair 30. In the one shown in FIG. 8, the loop-shaped hair root 31 is fastened 3.
2 and FIG. 9 shows an example formed by welding or adhesion 33, respectively.

To attach such artificial hair to the hair transplant needle, hook the loop-shaped hair root 31 onto the hair transplant needle 1 with the hair transplant needle 1 slightly protruding from the outer tube 2, and then retract the hair transplant needle 1. The hair roots 31 are guided to the opening surface of the outer tube 2 and fall naturally into the U-shaped cut 11, so that locking can be easily achieved.

Next, how to use the hair transplantation device of the present invention will be explained.

As shown in Figure 10, the U-shaped notch 1 on the needle tip
The tip of the outer cylinder 2 is pressed against the epidermis 36 of the human skin while the loop-shaped hair root part 31 of the artificial hair 30 is hooked on the outer cylinder 1. When the pusher 3 connected to the hair transplant needle 1 is pushed down with a fingertip, the hair transplant needle 1 plunges into the subcutaneous tissue 37 while retaining the hair root 31, as shown in FIG. The hair root 31 is pushed in until it reaches the subcutaneous tissue 37, which is 4 to 7 mm deep from the epidermis 36. This distance is automatically defined by setting the length of the keyway 5 in advance. Although the thickness of the flocking needle 1 is extremely thin at 0.2 to 0.25 mm as mentioned above,
Since the outer cylinder 2 is reinforced, it will not bend.

When the hair root 31 reaches a predetermined position, the hair transplant needle 1 is gently pulled out as shown in FIG. 12, and the hair transplant surgery is completed.

According to the hair transplantation device of the present invention, it is not only possible to attach artificial hair very easily and improve the efficiency of hair transplantation surgery, but also because the thickness of the hair transplantation needle is extremely thin, the epidermis caused by hair transplantation can be Also, good results can be obtained with extremely little destruction of the subcutaneous tissue and a high fixation rate of the transplanted hair.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the hair transplantation device of the present invention, Fig. 2 is a longitudinal cross-sectional view of Fig. 1, Fig. 3 is a cross-sectional view taken along line A-A in Fig. 2, and Fig. 4 is a portion of the needle tip. FIG. 5 is an enlarged partial sectional view showing the tip of the hair transplant needle and the tip of the outer cylinder, FIG. 6 is a partial sectional view showing another embodiment, and FIG. Figure 6 is a front view of the embodiment;
Figures 8 and 9 are drawings illustrating various types of artificial hair that can be applied to the hair transplantation device of the present invention, and Figures 10 to 1.
FIG. 2 is an explanatory diagram showing how to use the hair transplantation instrument of the present invention. 1... Flocking needle, 2... Outer cylinder, 3... Presser, 4
...Spring, 11...U-shaped notch, 16...
... Inclined surface, 17 ... Opening surface, 18 ... Outer circumference, 30
...Artificial hair, 31...Loop-shaped hair root.

Claims (1)

[Claims] 1. A hair transplant needle that has a U-shaped notch on the side wall of the tip of the hair transplant needle to anchor the roots of the artificial hair, and a hollow hole with an inner diameter that is approximately the same as the outer diameter of the hair transplant needle, and an outer cylinder. It consists of an outer cylinder with a tip opening surface formed by cutting only half of its circumference by a plane that slopes inward and a plane that includes the center line of the outer cylinder, and the circumference of the flocking needle and the outer cylinder The flocking needle is slidably installed in the outer cylinder so that the relative position in the direction is not displaced;
Moreover, the tip of the hair transplant needle is configured to protrude from the tip of the outer cylinder by the distance necessary for entering the skin and transplanting hair, and when the hair transplant needle is retracted into the outer cylinder, the tip of the hair transplant needle is A hair transplantation device characterized in that at least a part of the opening surface of the outer cylinder tip connected to the opening edge of the incision forms a guide surface for the hair roots to be anchored.