JP2009207861A - Toothbrush for polishing teeth over tooth row - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toothbrush which has the almost same width with a conventional one-face bristle toothbrush and has the same polishing effect with a two- or three-face bristle toothbrush by inclining outside bristle bundles inward at about 10° solving the problem of a conventional one-face bristle toothbrush for polishing all three faces of teeth, the face for biting, lip side and tongue side, simultaneously that the conventional one-face bristle toothbrush having all the bristle bundles planted vertically, the center row trimmed short and outside rows trimmed long is inferior in polishing ability to a toothbrush having outside rows inclined inward at 10-20° and two or three faces. <P>SOLUTION: Pins for outside bristle-planting holes are inclined at a predetermined angle and removed toward the backside of a bristle-planting base. After bristles are planted, the backside is filled and covered by a secondary molding. Alternatively, vertical planting holes with bottoms for the central rows on bristle-planting base face are molded simultaneously with the molding of the toothbrush body. Inclined holes are bored with a computer-controlled small drilling machine as a post processing. Bristles are planted short for central rows and long for outside rows. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a so-called full periodontal toothbrush that can simultaneously polish the meshing surface of the dentition, the lip side, and the lingual side of the toothbrushes used by the majority of people every day.

Conventionally, there are a large number of patents and utility model applications relating to all periodontal toothbrushes, most of which are flocked on the inner surface of a V-shape or U-shape formed by two or three surfaces. (For example, Utility Model Registration No. 3126032, Japanese Utility Model Publication No. 57-46832, Japanese Patent Laid-Open No. 2001-346633, Japanese Translation of PCT International Publication No. 63-503276)
In either case, oblique flocking is not possible with a single flocking surface, so two or three flocked base materials are arranged on a single plane, and after molding and flocking, the outer row bristles are tilted inward by some method. The method of assembling the flocked base material with an angle is adopted.

  In addition, the flocking substrate is single-sided, all flocked holes are bottomed, drilled perpendicularly to the flocked surface, the bristles in the middle row are trimmed as short as 5-6 mm, and the bristles in the outer rows are Some hairs are implanted to a length of about 10-13 cm, which is about twice as long. (For example, JP-A-7-143915, published utility Showa 53-61265, patent application publication 48-28150, etc.)

  The toothbrush of the paragraph [0003] has a lower brushing effect than the toothbrush shown in the paragraph [0002] because the entire bristle bundle is flocked perpendicularly to the flocked surface of the flocked base material, and the tooth row during the brushing It is easy to come off.

  There is a single-sided full-period toothbrush in which the width of the flocked base material is about 13 mm and the bristles of the bristles in both outer rows are curled inward to improve the brushing effect. (Reference: Toothbrush Encyclopedia 5th Edition, Gakken Shoin, page 24, lines 8 to 12)

  Even with a toothbrush with a single surface of the flocked base, if the bristles in both outer rows can be planted by tilting in the direction of the longitudinal center line of the flocked base, the same brushing effect as in the group of paragraph [0002] can be expected. In the current level of toothbrush manufacturing technology, it is possible to plant at an angle of up to 4 ° by forcibly tilting the planting hole that is perpendicular to the planting base, but planting at a further angle. It is impossible. In addition, even if the work is forcibly carried out, the flocking machine parts are severely worn and cannot be continued for a long time.

  In the present invention, in a single-sided flocking base toothbrush, it is an object to perforate the flock holes of both outer rows toward the outside as they move away from the flocked surface, and to incline the hair by inclining inward by a normal method. To do.

  In order to plant the hair by tilting the bristle bundle, it is necessary to incline the flock holes of the flocking base material, but the conventional thermoplastic synthetic resin is implanted in the flocking base material by injection molding. The pores are designed so as to pierce the bottomed flock holes vertically from the flocked surface, and no other method is adopted.

  To plant hair by tilting the bristles in the outer row inward with a single-sided toothbrush, both outer row flock holes will face outward as they move away from the flocked surface, so the flocking pins for forming diagonal flocks should be placed on the flocked side. It was impossible to pull out. In order to solve this point, the flocked base material is a single surface with a brushing effect equivalent to or close to that of a full periodontal toothbrush with two or three surfaces on one side, and the outer row bristle bundle is 10 ° on the center line side of the toothbrush. We want to obtain a full periodontal toothbrush that is tilted back and forth.

Means to solve the problem

  When molding a toothbrush housing by injection molding of thermoplastic synthetic resin, the center row flocking pin is perpendicular to the flocking surface and the outer row slanting pin is inclined to the required angle to penetrate the flocking substrate. Pull out the back of the flocked base material, and at the time of flocking, provide a bottom plate to plant the hair, then fill and form the back of the flocked base material by secondary molding with another mold, and the entire periodontal of the oblique flocking of a single base material Complete the toothbrush.

  By the conventional injection molding method of thermoplastic synthetic resin, the center row flocking holes are formed vertically and bottomed at the time of molding, the outer row flocking holes are post-processed, tilted to a desired angle by a computer controlled drilling machine, Drilling into the bottom and flocking to complete a full periodontal toothbrush with both outer rows of a single substrate inclined about 10 ° inward.

The invention's effect

  Conventionally, all the periodontal toothbrushes on the entire surface of the flocked base material have all bristles bundles implanted perpendicular to the flocked base material, but in the present invention, the bristles on both outer sides are inclined toward the center line of the toothbrush. As a result, the bristles on both outer sides of the dentition are brushed while holding the dentition at an appropriate pressure, so that the brushing effect is improved and the toothbrush is not easily removed from the dentition. Naturally, the effect compared with a normal toothbrush and a full periodontal toothbrush, for example, a full periodontal toothbrush can be brushed in a short time, and there is little unpolished.

BEST MODE FOR CARRYING OUT THE INVENTION

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  1 and 2, a toothbrush housing 1 includes a gripping part 2, a flocked base part 3 having a flocked hole, and a neck part 4, and is generally obtained by forming a thermoplastic synthetic resin by an injection molding method.

FIG. 3 is a flocked base material 3 viewed from the head side of the toothbrush according to the first aspect of the present invention, and the thickness between the flocked surface 5 and the flocked substrate back surface 6 is about 3 mm, and is provided perpendicular to the flocked surface 5. The flock holes 8 are provided at an angle of about 10 ° with the center flock holes 7 respectively.
The flocking hole constituting pins for forming the flocking holes 7 and 8 are pulled out to the flocking substrate back surface 6 side on the side where the angle is widened during molding.

  The toothbrush housing 1 obtained as described above is then hung on a flocking machine, and in order to stably hold the flocked base material portion 3, it is fixed by a jig 9 that is in close contact with the back surface 6 of the flocked base material. Next, the outer row is preferably cut on both outer rows, and one end is vertically cut and the other end is an ultra-tapered bristle bundle. Push into the supine position with a flat line and plant the hair.

  Next, if the back surface 6 of the flocked base material 3 is filled with the same material as the primary molding or an elastic rubber-like thermoplastic synthetic resin that is compatible with this, it is filled into a desired shape by injection molding, A complete periodontal toothbrush with a surface inclined bristle is completed.

  According to the above-described manufacturing method, the primary molding die for forming the toothbrush housing and the secondary molding die for filling the back surface of the flocked substrate 3 are required.

Best Mode for Carrying Out the Invention 2

  Hereinafter, an embodiment of the means 2 of the present invention will be described with reference to FIGS.

  FIG. 6 is a side view of the flocked base material 3 of the primary molded product obtained by the means 2 as seen from the head side, and the central flocked hole row 8 is obtained at the time of molding, and the outer flocked hole row 9 in FIG. Obtained by computer controlled automatic drilling machine.

  In general, if thermoplastic synthetic resin is drilled at a high speed with a drilling machine or the like, burrs can be easily formed near the mouth of the hole, but if ABS resin is used, there is no possibility of this, and there is no problem in the subsequent manufacture and use of the toothbrush.

  Front view of a general single-sided toothbrush housing   Plan view of a general single-sided toothbrush housing   Side view of flocked substrate 3 after primary injection molding of means 1 for manufacturing toothbrush of the present invention   Fig. 3 Side view after flocking   Completed side view of the head portion 3 of the means 1 for manufacturing the toothbrush of the present invention   Side view of head portion 3 'after injection molding of means 2 for manufacturing toothbrush of the present invention   6 is a side view of the head portion 3 'which has been mechanically drilled after FIG.   Side view of the head portion 3 'after flocking after FIG.

Explanation of symbols

3, 3 'flocking base material 5 flocking base material flocking surface 6 flocking base material back surface 7 center row flocking hole 7' central row flocking hole of means 2 for solving the problem 8 'outer row flocking hole after machining

Claims (1)

  Among the plurality of rows of bristles on one side of the flocked base material, the bristles in the middle row are planted to a height of 5 to 6 cm perpendicular to the flocked surface, and the bristles in both outer rows are inclined toward the center line around 10 °, A toothbrush flocked to double the length of the center row.

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