JPH0749006B2 - Spiral brush and manufacturing method thereof - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mascara brush for dyeing and applying eyelashes, a hair dyeing brush for locally applying and applying makeup to hair such as white hair,
Or, in a brush such as a cylinder brush, bend the middle part of one wire into two, insert the fiber and twist it into a thread, and align the two cut ends of the twisted wire. The present invention relates to a spiral brush of a type in which the screw is inserted into a shaft hole formed at the tip of the brush shaft and implanted, and a method for manufacturing the brush.

[Prior Art] A conventional brush of this type is described with reference to FIG. 2. It is utilized that a rope 4 made of a wire 1 extending from a brush 3 of a brush base material and twisted has a screw shape. Then, the shaft 4 is screwed into the shaft hole 5 provided at the tip of the brush shaft 6 by hand or by using a drilling machine. Further, as in the technique disclosed in Japanese Utility Model Laid-Open No. 56-37907, the cable shaft 4 is fitted into the shaft hole 5 by fitting the cable shaft 4 into the shaft hole 5 using ultrasonic vibration. It is also practiced that the swelled surface portion 4 is fused with the inner wall of the shaft hole 5 to improve the slip-out strength by the rotation of the ear part 3.

Incidentally, the brush base material in which fibers or the like are inserted into the wire member to form a spiral shape is disclosed in JP-B-57-7488, JP-B-55-95524, JP-B-56-25608 and JP-B-27-7558. It is disclosed in the official gazette. However, among these publications, except for slightly suggesting in Japanese Utility Model Publication No. 57-7488 that a cord shaft is screwed into the shaft hole, a brush base material for implanting a brush shaft is used. No specific method is described.

[Problems to be Solved by the Invention] In this type of brush, fibers that form the ears 3 are planted in a direction perpendicular to the brush shaft 6, and the usage mode is also a direction in which the ears 3 rotate with respect to the brush shaft 6. Since the cable shaft 4 inserted into the shaft hole 5 of the brush shaft 6 while holding the spike 3 on the shaft 3 has a screw shape, the rotational load in the direction to unscrew the spike 3 Is applied to the brush shaft 6, or even if it is not dropped, a strong rotational load is applied to the ear 3, so that the ear 3 rotates together and is used under severe conditions. It has a problem of being intolerable.

The smaller the inner diameter of the shaft hole 5 with respect to the effective diameter of the shaft shaft 4 inserted into the shaft hole 5, the stronger the planting strength of the shaft shaft 4 fixed to the brush shaft 6. If the inner diameter of the shaft hole 5 is made too small with respect to the effective diameter, it becomes difficult to insert the rope 4 into the shaft hole 5, and the thread of the ear 3 is bent or screwed in the case of screwing. Since a rotational load is applied in the direction of unraveling, the rope 3 is loosened, and the ears 3 are likely to come off.

Therefore, when the cable shaft 4 is screwed into the shaft hole 5 by hand or the like, the bulging surface portion of the cable shaft 4 is merely pressed strongly against the inner wall of the shaft hole 5, so that the planting strength is also weak and the ear is short. If the three parts are picked by hand and lightly rotated, the cord shaft 4 easily comes off from the brush shaft 6.

If the cable shaft 4 is screwed into the shaft hole 5 by ultrasonic waves, the cable shaft 4
The swelled surface part of is fused with the inner wall surface of the shaft hole 5,
The planting strength is also improved considerably, and the cord 4 does not easily fall off the brush shaft 6 simply by picking the ear 3 part by hand and rotating it lightly. However, if the shaft is strongly rotated after a shock is applied, the fused portion is separated and the cord shaft 4 rotates with respect to the brush shaft 6, resulting in a problem of falling off.

It might be good not to pick the 3rd part of the ear by hand and rotate it strongly, but there is also a direction to put the cloth on the 3rd part of the ear and pick it, and rotate it for cleaning. The fact that there is a handling prohibition for a person who does not know anything to use the product affects the functional value of the product.

The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a brush of this kind having a stronger planting strength than that in which the cable shaft 4 is ultrasonically fitted. Is.

[Means for Solving the Problems] In order to achieve the above object, in the spiral brush of the present invention, fibers are inserted between twisted wires, and the inserted fibers are pruned to have a predetermined contour. The brush shaft portion of the brush substrate is formed with a shaft portion formed of a thread formed by twisting the wire and extending from the spike portion. In a spiral brush which is planted in the shaft hole of a provided thermoplastic resin brush shaft, the inner peripheral surface of the shaft hole is melted by heat in the gap portion between the cable shaft portion and the shaft hole. The resin that has flowed in is densely filled.

In such a spiral brush, for example, when the threaded portion is planted in the shaft hole, at least the tip portion of the threaded portion is at a temperature at which the portion of the resin in contact with the tip portion is melted by heat or more. It can be manufactured by inserting it into the shaft hole and implanting it while being heated.

The structure of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a longitudinal cross section of a spiral brush according to the present invention, FIG. 2 is an enlarged front view of a vertical cross section of a tip end of the spiral brush according to the present invention, and FIG. FIG. 4 is an enlarged vertical cross-sectional view of a local portion in which the cable shaft 4 according to the conventional example is planted in the shaft hole 5, and FIG. 4 shows the cable shaft 4 according to the conventional example when the cable shaft 4 is fitted by ultrasonic waves. FIG. 5 is an enlarged vertical sectional view of a local portion planted in the shaft hole 5, and FIG. 5 is an enlarged vertical sectional view of a local portion where the cable shaft 4 of the spiral brush according to the present invention is set in the shaft hole 5.

In the so-called spiral brush according to the present invention, the wire 1 is bent in the middle thereof and overlapped with a margin, a large number of fibers 2 are inserted in parallel at the overlapped intervals, and the inserted state is maintained. Grasp the bent tip portion and the rear of the rope 4 with a chuck or the like, rotate one of them to twist the fiber 2, and prun the twisted fiber 2 into a predetermined contour shape to form the ear 3, 2 is inserted and extended and twisted into a shaft hole 5 of a brush shaft 6 as a rope 4.

The brush shaft 6 is made of a thermoplastic synthetic resin such as polypropylene by an injection molding method, the fiber 2 is animal hair or a fiber having the same thickness as animal hair, and the wire 1 is a wire such as a stainless steel wire. Is.

Reference numeral 7 is a gap between the chord shaft 4 extending from the ear 3 and the shaft hole 5 of the brush shaft 6, which is present as long as the shaft hole 5 maintains its shape. It is a recessed portion of the cable shaft 4 formed by being a twisted thread. That is, the swollen portion of the cable shaft 4 is the surface portion of the wire 1 on the outer circumference of the cable shaft 4, and the recessed portion of the cable shaft 4 is the twisted wire 1
It is a hollow space from the infinitely narrow contact portion that strongly intersects to the effective diameter of the cable shaft 4.

The spiral brush according to the present invention is characterized in that the inner peripheral surface of the shaft hole 5 extends and densely fills the gap 7 and is fixed to the surface of the cable shaft 4.

The fact that the inner peripheral surface of the shaft hole 5 extends and densely fills the gap 7 means that the shaft hole 5 is substantially deformed and the deformed resin component 9 is filled in the gap 7. It is that you are.

Further, the fact that the inner peripheral surface of the shaft hole 5 is fixed to the surface of the rope 4 does not only mean that the shaft hole 5 is in surface contact, but the surface of the wire 1 is slightly oxidized at the interface. And
That is, the surface of the resin which is in contact with the resin slightly changes due to heat to be cured, and the resin is adhesively bonded even at the interface.

In order to make such a mode in which the shaft 4 is implanted in the shaft hole 5 of the brush shaft 6, the tip of the shaft 4 is locally heated in a short time and quickly inserted into the shaft hole 5. It ’s good to do,
Since the cable shaft 4 is heated, the shaft hole 5 made of thermoplastic synthetic resin is inserted while melting and deforming. For this reason, the resin component 9 which is melted and has a semi-fluidity is filled in the hot gap 7.

Particularly, the inner peripheral surface of the shaft hole 5 filled so as to penetrate into the strongly infinitely narrow contact portion of the twisted wire 1 of the rope 4 whose temperature is kept high has a shape like that inserted into the rope 4. The cord 4 is oxidized when burned in air, and the resin component 9 in contact with the burned cord 4 is thermally changed and hardened to increase the adhesiveness.

[Operation] In the spiral brush according to the present invention, the inner peripheral surface of the shaft hole 5 extends and fills the gap 7 which is the recessed portion of the planted shaft 4, and the cord 1 is twisted with the wire 1. Since it is formed by the above method, it does not have a perfect screw shape. Therefore, even if the rotation torque in the direction of coming out of the brush shaft 6 is applied to the cable shaft 4 and the cable shaft 4 slightly moves, the contour of the shaft hole 5 formed by the resin component 9 filling the gap 7 is formed. Since the contour shape of the shape rope 4 does not become the contour shape in relation to the bolt and the nut, the extended inner peripheral surface of the shaft hole 5 acts so as to hinder further rotation.

The inner peripheral surface of the shaft hole 5 extends and the wire 1 in the gap 7 of the cable shaft 4
The resin component 9 densely packed in the infinitely narrow contact portion that strongly intersects with each other makes it seem that a part of the inner peripheral surface of the shaft hole 5 is inserted by the cable shaft 4 and inhibits the rotation of the brush shaft 6 with respect to the cable shaft 4. It works like it does.

The effect of the ultrasonic vibration according to the conventional example is that when there is a sharp protrusion on either the surface of the cable shaft 4 or the inner peripheral surface of the shaft hole 5, the friction heat concentrates on the sharp tip of the protrusion. Then, the inner peripheral surface of the shaft hole 5 is effectively melted, but in the case of the conventional example in which there is no such protrusion on both sides, the cable shaft 4 is locally fused by being fitted into the shaft hole 5. Only to do. On the other hand, when the cable shaft 4 is burned and inserted like the spiral brush according to the present invention, the surface of the cable shaft 4 is slightly oxidized, and the interface of the shaft hole 5 with the thread is also. Although it is slightly changed by heat, the adhesiveness is increased, and the state is fixed more than the conventional fusion by ultrasonic waves.

The action of the spiral brush according to the present invention relates to the effect of improving the slipping rotational torque of the shaft 4 with respect to the brush shaft 6, and at the present time, the function is remarkably improved as compared with the conventional spiral brush fitted by using ultrasonic waves. Has not yet determined whether or not it is necessary to further improve the slipping rotational torque, but if the number of working steps, that is, the production cost is ignored, the shaft hole 5 in which the rope shaft 4 is planted Intervening hot melt adhesives in the
It has been proved that the slipping rotational torque can be further improved by locally crushing the above and combining it with the structure of the spiral brush according to the present invention.

Example The spiral brush having the structure shown in FIGS. 1 and 2 was first embodied as a mascara brush for applying eyelashes. Referring to FIGS. 1 and 2, the wire 1 is made of SUS304 and has a diameter of 0.
75mm stainless steel wire, fiber 2 has a diameter of 0.076mm
6,12-nylon fiber. Brush base material (spike 3 and cord 4)
Three parts of the panicles were pruned to a length of 19 mm and a diameter of 4.8 mm. The ears 3 and the cords 4 are twisted to have a diameter of 1.22 to 1.42 mm and a length of 9 mm. The polypropylene brush and shaft 6 have an inner diameter at the tip.
A shaft hole 5 of 1.1 mm and a depth of 10 mm is provided. The shaft hole 5 is provided with a taper at the mouth for facilitating the insertion of the cable shaft portion, and the inner diameter at the mouth of the shaft hole 5 is 1.4 mm.

In this mascara brush, the tip of the rope shaft 4 of the brush base that has been pruned as described above is instantly red-heated (800 ° C or higher) by the thin and sharp flame of the gas burner, and is pushed into the shaft hole 5 without burning. Created.

The slipping torque of the shaft 4 of the spiral brush thus prepared was measured by gripping the wire 1 at the tip of the spike 3 with a torque driver, and the average value was 400 g-cm.

Also, when the brush shaft of the spiral brush thus created was cut and the cross section was observed, the resin portion in which the inner peripheral surface of the shaft hole 5 was melted was found in the portion which was conventionally the gap between the cable shaft and the shaft hole 5. Close packing,
The resin portion of the brush shaft was also half-burned and filled in the gap between the twisted wires of the shaft, and the resin portion was cured and the wires and the wire and the brush shaft were fixed.

Next, in FIGS. 1 and 2, the material of the wire 1 is SUS3.
04 is a stainless steel wire with a diameter of 0.8 mm, fiber 2 is a 6,12-nylon fiber with a diameter of 0.102 mm, and 3 ears have a length of 3
Pruned to 0mm and 8mm in diameter, with cable shaft 4 1.34mm to 1.54m in diameter
A brush base with a length of 10 mm and a length of 10 mm is provided at the tip of the brush shaft 6 made of polypropylene. The inner diameter of the mouth is 1.51 mm, the actual inner diameter is 1.26 mm, and the depth is 12 mm. By planting in, a threaded brush embodied as a hair dyeing brush was created. The slipping rotational torque of the cord 4 of this spiral brush was measured by grasping the wire 1 at the tip of the ear 3 with a torque driver, and the average value was 450 g-cm.

[Advantages of the Invention] The effects of the spiral brush according to the present invention become clear when compared with those of the prior art in the spiral brush having the same size and appearance, and in the case of the mascara brush in the embodiment, Although the inner diameter of the shaft that escapes from the mouth of the shaft hole 5 is different, the average value of the slipping torque of the conventional screw that is simply screwed is as low as 100 g-cm, and it was fused and bonded by ultrasonic waves. In the case of the present invention, the average value was improved to 150 g-cm, but in the case of the present invention, the average value was greatly improved to 400 g-cm.

In the case of the hair dyeing brush in the embodiment, the inner diameter of the conventional brush that escapes from the mouth of the shaft hole 5 is different, but the average slipping torque of the conventional one simply screwed is 120 g-
The value is as low as cm, and the average value is improved to 200 g-cm in the case of fusion bonding with ultrasonic waves, but the average value is greatly improved to 450 g-cm in the case of the present invention.

As described above, the spiral brush according to the present invention exerts a particularly remarkable effect as compared with the spiral brush according to the conventional example in the gap 7 formed between the cable shaft 4 extending from the ear 3 and the shaft hole 5 of the brush shaft 6. This is because the inner peripheral surface of the shaft hole 5 is extended and densely filled, and the various functions derived from the structure fixed to the surface of the rope 4 are combined and synergized.

It has already been explained that the rotational torque of the shaft 4 coming off from the brush shaft 6 is important in such a spiral brush such as a mascara brush or a hair dye brush. In this case, the rubbing between the eyelashes or the hair and the ears 3 acts on the cord shaft 4 so as to give a rotational torque to the brush shaft 6, and the rotational torque may be clockwise rotation or counterclockwise rotation. For this reason, once the cable shaft 4 can rotate, it will easily rotate even if a very small rotational torque is applied from the next, and it will not be usable.

[Brief description of drawings]

1 is a front view of a local longitudinal cross section of a spiral brush according to the present invention, FIG. 2 is an enlarged front view of a local vertical cross section of a tip end portion of a spiral brush according to the present invention, and FIG. 4 according to the conventional example
FIG. 4 is an enlarged vertical cross-sectional view of a local portion where the cord shaft 4 is implanted in the shaft hole 5, and FIG. 4 shows a conventional portion where the cord shaft 4 according to the conventional example is fitted in the shaft hole 5 when the cord shaft 4 is ultrasonically fitted. FIG. 5 is an enlarged vertical sectional view of a local portion in which the cable shaft 4 of the spiral brush according to the present invention is embedded in the shaft hole 5. 1 ... Wire, 2 ... Fiber, 3 ... Spike, 4 ... Cable shaft (thread), 5 ... Shaft hole, 6 ... Brush shaft, 7 ... Gap, 8 ... Joining surface, 9 ... ... resin content.

Continuation of the front page (56) References Microfilm (JP, U), which is a photograph of the contents and drawings attached to the application for Japanese Patent Application No. 54-120488 (No. 56-37907) Microfilm (JP, U) Micro Application (JP, U) No. 51-96124 (No. 53-15945, No. 53-15945) taken from the specification and drawings attached to the application for No. 49-99186 (No. ) A microfilm (JP, U) of the contents and drawings attached to the application

Claims (6)

[Claims] 1. A fiber is inserted between twisted wires,
A brush base material in which the inserted fiber is pruned to a predetermined contour to form a spike portion, and a cord shaft portion formed of a thread in which the wire is twisted is formed extending from the spike portion is formed. A spiral brush formed by implanting the cable shaft portion in the shaft hole of a thermoplastic resin brush shaft having a shaft hole at the tip, wherein a gap is formed between the cable shaft portion and the shaft hole. A spiral brush characterized in that the inner peripheral surface of the shaft hole is densely filled with the resin melted by heat and flowing in. 2. A surface of the resin, which is densely filled in a gap between the cable shaft portion and the shaft hole, in contact with the cable shaft portion is slightly changed by heat so that the surface of the cable shaft portion is cured. The spiral brush according to claim 1, which is fixed. 3. The spiral brush according to claim 1, wherein the rope shaft portion is locally crushed. 4. A fiber is inserted between twisted wires,
A brush base material in which the inserted fiber is pruned to a predetermined contour to form a spike portion, and a cord shaft portion formed of a thread in which the wire is twisted is formed extending from the spike portion is formed. A method for manufacturing a spiral brush in which the cord shaft portion is planted in the shaft hole of a thermoplastic resin brush shaft having a shaft hole at the tip, wherein at least the tip portion of the cord shaft portion is A method of manufacturing a spiral brush, wherein the resin is inserted into the shaft hole and implanted in a state in which a portion of the resin in contact with the tip portion is heated to a temperature at which the resin is melted by heat or higher. 5. The method according to claim 4, wherein the rope shaft portion is locally crushed before the planting. 6. The manufacturing method according to claim 4, wherein the tip portion of the rope shaft portion is planted in a state of being red-heated.