JPS6211453Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to brushes such as toothbrushes and hairbrushes.

As shown in FIG. 1, conventionally, the tip of the brush body 2 has a bristle flock 3 which is connected at a desired inclination angle with respect to the axial horizontal line of the brush body 2. A resin brush 1 is known in which a tufting hole 4 is formed perpendicularly to the horizontal line in the axial direction of the bristle brush 1, and a group of 5 tufts of bristle are planted in the tufting hole 4 with their tips aligned horizontally. In order to plant 5 groups of flocked hair on such a brush 1, as shown in FIG.
An auxiliary device 6, which has a hollow cylindrical shape with a diameter slightly larger than the diameter of the hole, and is supported by a support member (not shown) is installed with its lower end in contact with the hole edge on the tip side of the tufting hole 4 in the tufting section 3. Then, fold the lower end of the 5 groups of flocked hairs, which were folded in half and inserted into the auxiliary machine 6 from above, into the auxiliary machine 6.
The stopper 8 is engaged with the vertical guide groove 7 provided on the opposing inner peripheral wall of the auxiliary machine 6, and then the stopper 8
is moved downward by the pressure of the pressing tool 10 and press-fitted into the inner circumferential wall of the tuft hole 4, thereby implanting the 5 groups of tufts. However, if the inclination angle θ' exceeds the thickness of the tan ^-1 brush/the hole diameter of the flocking hole during the planting, when the auxiliary device 6 is installed, the flocking part 3
Since the gap S formed between the hole edge on the opposite side to the tip of the flocking hole 4 and the lower end of the auxiliary device 6 becomes larger, when the stopper 8 passes through the hole edge, part of the flocking group 5 may escape from the gap S, or the stopper 8 may be inserted into the tufting hole 4 at an angle, resulting in defective bristle (bristle that is slanted or stuck to the edge of the hole). It is becoming. Therefore, if the angle θ' was normally equal to or greater than the thickness of tan ^-1 brush/diameter of the tuft hole, it was impossible to implant the 5 groups of tufts.

This invention eliminates the drawbacks of the above-mentioned conventional ones and makes simple improvements to the bristle part of the brush having the angle θ' as described above. The purpose is to provide a brush that can be planted effectively.

In order to achieve the above object, the brush of this invention is provided with a concave part on the edge of the tip of the bristle-planting hole in the bristle-planting part, and the angle formed by the bottom surface of this concave part and the surface of the bristle-planting part is the angle θ' It is configured so that it is no larger than

This invention will be explained in more detail with reference to the embodiments shown in FIGS.

In this embodiment, the same parts as in the conventional one are given the same reference numerals, and the explanation thereof will be omitted, and only the different parts will be explained.

Reference numeral 13 denotes a rectangular concave portion, and this concave portion 13 is provided at the hole edge on the tip side of the tufting hole 4 in the tufting portion 3. The angle θ formed by the bottom surface of the concave portion 13 and the surface of the flocked portion 3 is configured not to be larger than the angle θ′. Although the concave portion 13 has a rectangular shape in the drawing, it goes without saying that it may have a shape other than this, such as an ellipse.

Since it is configured as described above, when the auxiliary device 6 is installed, the gap formed between the edge of the hole opposite to the tip of the tufting hole 4 in the tufting section 3 and the lower end of the auxiliary device 6 is extremely small. Either it will disappear or it will almost disappear. Therefore, when the stopper 8 passes through the edge of the hole, the flocked 5
Part of the group no longer escapes from the gap and no stray hairs occur, and the defective implantation of the 5 groups of hair transplants is wiped out. To explain this in more detail, the angle θ' of the flocked portion 3 at which part of the flocked 5 groups escapes and the uneven hairs occur is determined by the thickness d of the brushes of the 5 flocked groups as shown in FIG. , is influenced by the hole diameter D of the tufting holes 4, and if the size of the gap S becomes larger than the thickness d of the brushes of the tufting 5 groups, frizzy bristles are likely to occur. Therefore, to prevent this, the angle θ' should be set to an angle at which the gap S is smaller than the thickness d of the brushes in the 5 groups of flocking, and an angle smaller than tan ^-1 brush thickness/hole diameter of the flocking holes. This prevents the occurrence of frizzy hair, and that is why the recessed portion 13 is provided as described above to prevent the angle θ from becoming larger than the angle θ'.

Since this device is constructed as described above, it is possible to plant flocks at an angle greater than tan ^-1 brush thickness/flock hole diameter with respect to the horizontal line in the axial direction of the brush body, which was conventionally considered impossible. This has excellent effects such as being able to effectively implant a group of flocked hairs without causing clumps or the like in the consecutively arranged flocked areas.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of a conventional brush, Fig. 2 is an enlarged cross-sectional view of the main part of the same bristle-planting part, and is used to explain the action of planting bristle groups in the bristle-planting holes, and Fig. 3 is a diagram of this invention. FIG. 2 and corresponding drawings of the embodiment, No. 4
The figure is a plan view of the same as above, and FIG. 5 is an enlarged cross-sectional view of a main part showing the relationship between the diameter D of the tufting holes and the thickness d of the brush. 1... Brush, 2... Brush main body, 3... Flocking section, 4... Flocking hole, 5... Flocking, 6... Auxiliary device,
7... Vertical guide groove, 8... Stopper, 10... Pressing tool, 13... Recessed portion.

Claims (1)

[Claim for Utility Model Registration] The angle formed by the axial horizontal line of the brush body and its surface is tan ^-1 at the tip of the brush body.
In a brush which has a continuous bristle part having a thickness equal to or larger than the diameter of the bristle planting hole, and in which a bristle hole is formed in the bristle part in a direction perpendicular to the horizontal line in the axial direction of the brush body, A brush characterized in that a recess is provided at the edge of the tip of the bristle-planting hole, and the angle formed by the bottom of the recess and the surface of the bristle-plant is not larger than the angle.