JP2010259743A - Toothbrush for brushing while holding dentition between - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toothbrush capable of brushing the clenched surface, the lip side and the tongue side of a dentition at the same time. <P>SOLUTION: The toothbrush for brushing while holding the dentition between is constituted by providing, between a parallel surface of a parting line and both bristled surfaces, an angle allowing die production and bristling even if bristle holes 5 are inclined with respect to the bristled surfaces, out of angles to incline bristle bundles of laterally connected bristle base materials 1, 1' inward, subtracting an angle after primary molding of providing all the bristle holes 5 perpendicularly to the parting line PL, from the parting line PL, carrying out secondary molding of slits 4 between the bristle base material 1, 1', a neck part and a grip part, and then bristling a center array to be short and outside arrays to be long. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a toothbrush (hereinafter referred to as “whole periodontal toothbrush”) that can simultaneously polish the meshing surface of the dentition and the three surfaces of the lips (front) side and the tongue (back) side among the toothbrushes used by the majority of people every day. The toothbrush in which the outer bristles are inclined toward the center line side of the toothbrush housing.

  All periodontal toothbrushes can be broadly divided into a state where the center row of the flocked bundle of a normal toothbrush is short, the flocked outer row is long, and the flocked bundle is divided into two or three, and each flocked surface is arranged in a planar shape A toothbrush housing in which the flock holes are provided vertically is molded, and after flocking, each flocked base material is bonded or fixed at a desired angle inward. Hereafter, the latter literature is mentioned.

  A toothbrush characterized in that side brushes are provided on both sides of a central toothbrush base material, and are combined with an elastic band so that the angle can be varied, and is short on the central toothbrush base material, and is planted on the side toothbrush base material the same or longer. (Patent Document 1) JP 2001-346633 A

  Use ABS resin, etc., which is easy to dissolve in a solvent, to separate the V-shaped groove with extremely thin bottom on both sides of the tip of the toothbrush gripping part, provide two flocking base materials, and weld both sides of the V-shaped groove together after flocking Toothbrush characterized by. (Patent Document 2) Japanese Patent Publication No. 63-503276

  In the two examples, the two-sided flocking base material having two rows of flocking holes is thin-walled so as to improve the drawbacks such as requiring manual assembly and the width of the flocking base material being 25 mm or more. Primary molding with rigid thermoplastic plastic so that it is connected with a continuous band, fixed to a mold so that the two flocked surfaces are about 150 ° to 160 °, and the gap between the flocked base materials and the neck portion There is a “toothbrush that brushes across the dentition” of the applicant of the present application, in which the part is filled and fixed by an injection molding method with a soft synthetic resin material that is the same as or compatible with the primary molding material. (Patent Literature 3) Patent 4143882

In Patent Documents 1 and 2, there is a portion where the two flocked base materials are joined after brushing, and there is a portion where the polishing wrinkles stay behind the assembled parts, or portions that do not dry for a long time, which is unsanitary. In addition, since we were particular about polishing with the end face of the filament, the width of the flocked base material was as wide as 25 mm or more.
As a result of using the toothbrush according to Patent Document 3 as a monitor, the width of the flocked base material was finished to 15 mm. However, like the conventional toothbrush, the width is preferably about 10 to 12 mm. It is desirable to plant the hair by tilting the bundle toward the center line, create a gap row that sandwiches the tooth row within the row, and make sure that the joints of both flocked bases are as flat as possible so that unpolished wrinkles do not stay Revealed.

The toothbrush manufacturing method currently in use is that the entire gripping part, neck part, and flocking base part, including all periodontal toothbrushes, are made into one body by the injection molding method of hard thermoplastic plastic. All the flocking holes are formed by removing flocking pins provided substantially perpendicular to the parting line (hereinafter referred to as “PL”) of the mold.
In the current technology, when the hair bundle is to be provided at an angle of 5 ° or more with respect to the vertical line of the PL, as shown in Patent Documents 1, 2, and 3, the flocked base materials divided into two are arranged in a single plane and vertically A flocking hole is provided in the hair transplantation base, and the flocked substrate is fixed at an angle after flocking.

  In the present invention, without reducing the function of Patent Document 3 for the above reasons, the total width of the flocked substrate is 10 to 12 mm, and the flocked surface is flat or connected at an angle close to this. In addition, toothbrushes in which the outer flock bundles are inclined inward by about 10 ° are required.

Means for Solving the Invention

  In the current manufacturing process of toothbrushes, the gripping part, neck part and flocked base part are integrally molded by injection molding with thermoplastics, but flocked holes are also formed at the same time, generally vertical or inclined. Even if a flock hole is required, the mold can be manufactured up to about 5 °. However, in the present invention, the inclination of the flock of the outer row is required to be 10 °, which is solved by the method described in the next section.

  First, a flocked substrate as shown in FIG. 1 and FIG. 2 is manufactured by primary molding, and then attached to a mold for expanding the slit 4 as shown in FIG. Slit and neck part, gripping part is the same material as the flocked base or secondarily molded by a thermoplastic injection molding method, and then transplanted to obtain the desired toothbrush, or flocked after the first molding, Secondary molding is performed using a mold that can be housed in the flocked portion.

The invention's effect

  The “toothbrush brushed across the dentition” of the present invention is much easier to operate than ordinary toothbrushes, and the entire tooth surface can be polished in a short time without being left unpolished. Effectively, it is effective in controlling bad breath, preventing and treating caries and periodontal diseases.

  The usage is so simple that it is easy to understand without receiving instructions from the polishing staff, and since it is difficult to come off the dentition during use, it can be used by infants and those who require mild care.

BEST MODE FOR CARRYING OUT THE INVENTION

  The shape of an ordinary toothbrush is fixed at a width of 10 to 12 mm, a length of 20 to 25 mm, and a thickness of 5 mm through a thin neck at the tip of the grip. A detailed description will be given of the best mode of manufacture of a toothbrush in which only a flocked row is inclined about 10 ° toward the center side of the toothbrush housing and a gap row is provided to sandwich the tooth row without greatly changing the size and shape.

  FIG. 1 shows a plan view of a flocked base material of a toothbrush obtained by primary molding by a hard thermoplastic injection molding method, and FIG. 2 shows a cross-sectional view taken along line AA ′ of FIG. 1 and 1 ′ are divided into two by a slit 4 provided on the center line, and are flexibly connected by a connecting band 3. θ ′ indicates an angle that is normally 5 ° or less that can be drilled by tilting with respect to a flat surface by a conventional technique in manufacturing a mold, and θ ′ indicates two flocked surfaces 2 and 2 ′, respectively, from a parallel plane of PL. Expand all the flock holes 5, 6 perpendicular to the PL.

  Next, as shown in FIG. 3, the angle between both flocked surfaces 2, 2 ′ is approximately 170 obtained by subtracting the angle θ ″ obtained by subtracting the angle θ ′ gained by the primary molding from the angle θ desired to be tilted from the parallel plane of PL. In the mold that is at a degree, the slit 4, the neck part, the gripping part, etc. are secondarily molded with the same material as the primary molding or with a hard plastic having compatibility.

  Next, using a hair transplanter, a fine filament of about 3 mil in the center row was implanted to a length of 5 to 6 mm in the exposed portion, a thickness of about 5 to 7.5 mil in the outer row, and one end was finely processed at the tip. If the hair is planted so that the length of the exposed part of the filament is 12 mm and the other end is 8 mm, the total flock is 10 ° around the center of the toothbrush case. A toothbrush having a gap row sandwiching the row of teeth can be mass-produced.

  It is also possible to perform secondary molding using a mold that can store the flocking in the secondary mold after the process sequence is performed immediately after the primary molding and all rows are implanted as described above.

  Although the four-row flocking toothbrush has been described up to the previous stage, as shown in FIG. 5 and subsequent drawings, a main flocking base material is provided at the center, a sub-flocking base material is provided on both sides, and the same method as two flocking base materials is used. A toothbrush that brushes across the row of flocks is obtained. The effect, usage, etc. are equivalent to 4 rows flocking.

The top view of the 4-row flocking toothbrush flocking base material obtained by the primary molding which shows this invention embodiment AA 'sectional view of FIG. Sectional view after secondary molding of the same part as FIG. The side view of the head part at the time of completion of this invention 4 row flocking toothbrush The top view of the 3 row flocking toothbrush flocking base material obtained by the primary shaping | molding which shows this invention embodiment BB 'sectional view of FIG. Sectional view after secondary molding of the same part as FIG. Side view of the head when the present invention three-row flocking toothbrush is completed

1, 1 'Flocked base material 2, 2' Flocked surface 3 Flocked surface connecting band 4 Flocked substrate slit θ The angle θ ′ formed by the vertical line of the whole image of the flocked substrate desired by the present invention and the flocked hair bundle After primary molding The angle between the parallel plane of PL and the flocked surface θ ″ The angle between the parallel plane of PL after secondary molding and the flocked surface PL Parting line at the time of primary molding

Claims (3)

  In a hand-brushed toothbrush and electric toothbrush, the flocked substrate portion is divided into two in parallel and flexibly with respect to the axis of the toothbrush, and the angle formed by the flocked surfaces is the vertical line of the whole flocked surface required at the time of completion. Of the angle θ formed by the flocked hair bundle, even if the flocked hole is inclined with respect to the flocked surface, the angle θ ′ at which the mold can be manufactured and mechanical flocking can be made is parallel to the parallel surface of the mold parting line It is applied between both flocked surfaces, and all flocked holes are first molded with a hard thermoplastic by an injection molding method so as to be perpendicular to the parting line, and then within the angle θ required at the time of completion, The same or compatible with the primary molding material by injection molding with the mold of the flocked surface having the angle obtained by subtracting the angle θ ′ gained in the primary molding from the parallel surface of the parting line The material with the slit, A toothbrush that forms a toothed portion and a gripping portion, and then polishes with a tooth row of four rows of flocking in which the center row is short and the outer row is long.   3. A three-row flocking toothbrush of the same manufacturing method as in claim 1, wherein the flocking substrate portion is divided into three in parallel and flexibly with respect to the axis of the toothbrush.   The toothbrush according to claim 1 or 2, wherein a mold that can be used for flocking after the primary molding and that can store the entire bristles during the secondary molding is used.

Images