JPS5835076Y2 - brush - Google Patents

Description

[Detailed explanation of the idea] This invention concerns a brush.

BACKGROUND ART Conventionally, as shown in FIG. 1, a brush has been known in which a brush handle a is fitted with a bristle part so as to be integrated.

The brush handle a is formed by integrally molding a grip C and a frame d of the bristle-planting surface with a hard resin.

Further, the flocked part is made of a resin having enough elasticity to form the flocked surface e and the bristles f that will stand up from it, and is integrally molded.

One of the brushes with this basic structure is the
It is described in Publication No.-50.

However, in addition to the above configuration, the brush described in this publication has a bristle-filled surface that is curved so as to bulge outward, and the edge of the bristle-filled surface is locked in a groove formed in the frame. Therefore, the flocked surface cannot bend freely.

Therefore, the bristles tend to act as something with strong rigidity, giving the brush a hard feel and giving a feeling of pain when scrubbing the head with the brush.

A brush with a softer feel is one that has a coil spring attached behind the flocking surface, which was developed in 1983-3447.
It is stated in No. 5.

However, since coil springs are made of metal, they are easily corroded by rust, and therefore not only do they not last long, but they also have the disadvantage of being time-consuming and difficult to manufacture.

Apart from this, a brush in which foamed resin or sponge is inserted behind the bristle surface is described in Japanese Utility Model Publication No. 42-6067.

However, since foamed resin or sponge has uniform elasticity throughout, it is not possible to give detailed consideration, such as giving the strongest elasticity to the central part where the most force is applied, and the comfort of use has not been completely satisfactory.

In addition, since the foamed resin or sponge cannot be integrally molded with the flocked surface, there is a drawback that it takes time and effort to manufacture.

The inventor set out to remedy the above-mentioned drawbacks.

By providing needle-like protrusions made of flexible resin behind the flocked surface e, it is possible to impart appropriate elasticity to the flocked surface, and the strength of elasticity can be changed by appropriately biasing the distribution of the projections. I learned that it is possible to have

They also realized that by making the protrusions from resin, they would last longer and be easier to manufacture.

This invention was made based on such knowledge.

This idea consists of (1) a hard resin brush handle consisting of a grip and a frame for the flocking surface, and (2) a flexible resin flocking part in which the flocking surface and the bristles that will stand up are integrally molded. Become,
For brushes in which the flocked surface is fitted into the frame of the brush handle, a gap is created between the flocked surface and the inner surface of the frame behind it, and the bristles protrude from the frame, it is possible to move the bristles from the flocked surface toward the inner surface of the frame. A needle-like protrusion made of flexible resin is erected, the tip of the needle-like protrusion contacts the inner surface, the needle-like protrusion is bent in the longitudinal direction, and the reaction force accompanying the deflection causes the flocked surface to be pulled away from the inner surface. This is a beautiful brush.

The brush according to the invention will be explained as follows with reference to the drawings.

FIG. 2 is a partially cutaway perspective view of the brush according to this invention.

FIG. 3 is a perspective view of the brush shown in FIG. 2, with only the flocked portion taken out and turned over.

In FIG. 2, 1 is the handle of the brush, 2 is the frame of the bristle-planting surface, and these together constitute the brush handle a.

Reference numeral 3 denotes a flocking surface, and numeral 4 bristles, which are integrally molded to constitute a flocking part.

5 is a lid formed separately from the brush handle a, and constitutes a part of the frame 2.

A gap is formed between the inner surface of the lid 5 and the flocked surface 3.

Reference numeral 6 denotes a needle-shaped protrusion that is integrally formed on the back surface of the flocked surface 3 so as to stand up from the flocked surface.

The brush shown in Figure 2 is made as follows.

The grip 1 and the frame 2 are made of hard resin, and a through hole is formed in the frame 2, into which the lid 5 just fits.

The lid 5 is made of the same hard resin as the resin forming the brush handle a.

As the hard resin, AS resin, ABS resin, polystyrene, acetic acid cellulose, polycarbonate, polypropylene, polyethylene, polyamide, etc. can be used.

The flocking part is composed of a flocking surface 3, bristles 4 standing upright on the flocking surface side, and protrusions 6 standing upright thereon on the back side.

The flocked surface 3, the bristles 4, and the protrusions 6 are integrally molded from a resin having a certain degree of flexibility.

As the resin, polyolefin resin or boamide resin is used.

The shape of the peripheral edge of the flocked surface 3 is similar to the peripheral shape of the through hole in the surrounding frame 2, but the peripheral length of the flocked surface 3 should be equal to or slightly larger than the peripheral length of the through hole. is desirable.

If it is made slightly larger, when the flocked surface 3 is forcefully inserted into the through hole, the flocked surface 3 will be curved to a mid-height position.

Even if the flocked surface 3 is curved, the bristles 4 are always maintained in an upright relationship with respect to the flocked surface 3.

As shown in FIG.
It is set up in the opposite direction.

The tip of the protrusion 6 is in contact with the inner surface of the lid 5.

Since the protrusions 6 are made of flexible resin, they bend in the longitudinal direction due to the pressure received from the flocked surface, and act to separate the flocked surface 3 from the lid 5 due to the reaction force accompanying the deflection.

To this end, it is desirable that the protrusions 6 be molded from an elastic resin so as to be slightly longer than the distance between the flocked surface 3 and the inner surface of the lid 5.

Further, it is desirable that a plurality of protrusions 6 be provided only in the center of the flocking surface.

The projections 6 may have the same shape as the hairs provided on the surface side of the hair-planting surface, but the length thereof is usually shorter than the hairs, and the number thereof is much smaller than the hairs. They are sparsely attached only to the center of the back side of the flocked surface.

To make the brush of this invention, a bristle-filled part is inserted into the hole in the frame 2 of the brush handle a, with the back facing out.

At this time, the bristles 4 are directed to the front, and the protrusions 6 are directed to the rear.

After inserting the flocked portion in this manner, the lid 5 is fitted behind the flocked surface 3, and the lid 5 is adhered and fixed to the frame 2.

In this state, the tips of the protrusions 6 come into contact with the lid 5, and the elasticity of the protrusions 6 pushes the flocking surface 3 away from the lid 5.

However, when a pressing force is applied to form bristles 4, the bristles 4 can still be depressed against the resistance due to the elasticity of the protrusions 6, so the bristles 4 can move over a large range, and are therefore considered to be sufficiently soft. It will work.

In addition, in FIG. 2, the lid 5 is made separate from the brush handle a and is fitted later, but the lid 5 may be made integrally with the brush handle a from the beginning.

In the brush of this invention, the flocked surface 3 and the bristles 4 are integrally molded from a flexible resin, and the bristles 4 stand up from the flocked surface 3, so the bristles 4 act as flexible bristles.

In addition, since there is a gap between the back side of the flocked surface 3 and the lid 5, the flocked surface 3 itself can be bent freely, and therefore the hairs 4 can be bent from the root, making them even more flexible. act.

In addition, since the needle-like projections 6 made of flexible resin stand up in the above-mentioned gap, the flocked surface 3 is supported by the projections 6, and since the projections 6 are bent in the longitudinal direction, the flocked surface 3 is properly hollowed out.

In addition, due to the reaction force caused by the bending of the protrusion 6, the flocked surface 3 is pushed against the lid 5.
Since the hair is pulled away from the hair, the flocked surface 3 easily returns to its original shape.

Therefore, the bristles 4 act as having a suitably soft feel within a suitable range.

Furthermore, by appropriately biasing the distribution of the protrusions 6, it is possible to provide desired strength of elasticity at a desired position on the flocked surface 3.

Moreover, since the bristles 4 can be made thick enough to give the bristles a soft feel, the bristles themselves are strong and less prone to breakage or damage.

In addition, since the protrusions 6 are made of resin, they do not rust or corrode and are long-lasting.

Furthermore, since it is made of resin, it can be easily fixed integrally to the flocking surface 3.

In this respect, this idea has great practical value.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a known brush. FIG. 2 is a partially cutaway perspective view of the brush according to this invention. Figure 3 shows the bristle part removed from the brush in Figure 2.
It is a perspective view when turned over. In the figure, 1 is the grip, 2 is the frame of the flocked surface, 3 is the flocked surface,
4 is bristles, 5 is a lid, 6 is a protrusion, a is a brush handle, and b is a flocked part.

Claims (1)

[Scope of utility model registration request] The brush handle consists of (1) a hard resin brush handle consisting of a grip and a frame for the flocking surface, and (2) a flexible resin flocking part that is integrally molded with the flocking surface and the bristles that will stand up. In a brush in which the flocked surface is fitted into the frame, a gap is created between the flocked surface and the inner surface of the frame behind it, and the bristles protrude from the frame, the brush is flexible from the flocked surface side to the inner surface of the frame. A needle-like projection made of resin is erected, the tip of the needle-like projection contacts the inner surface, the needle-like projection is bent in the longitudinal direction, and the reaction force accompanying the bending causes the flocked surface to be pulled away from the inner surface. brush.