JPH0219319U - - Google Patents

Description

[Brief explanation of drawings]

Figure 1A is a side view of a spherical body formed at the tip of a filament in a toothbrush of the present invention, Figure 1B is a plan view of the same spherical body, and Figure 2 is a side view of a spherical body formed at the tip of a filament in another embodiment of the present invention. FIG. 3 is a front explanatory view of the tip of one bristle bundle in an embodiment of the toothbrush according to the present invention;
FIG. 4 is a perspective view of one bristle bundle, FIGS. 5 and 6 are front explanatory views showing one bristle bundle in another embodiment of the toothbrush according to the present invention, and FIG. 7 A and B are spherical. An explanatory diagram showing the state of contact between the body and the area to be cleaned; FIG. 8 is a front explanatory diagram showing one bristle bundle in a conventional toothbrush; FIG. 9 is a plan explanatory diagram showing the occlusal surface of molar teeth;
FIG. 10A is an explanatory diagram showing a state in which one bristle bundle of the toothbrush according to the present invention is pressed against the occlusal surface of the molar teeth;
Figure 10 (b) is an explanatory diagram showing a state in which one bristle bundle of a conventional toothbrush is pressed against the same area, and Figure 11 (a) is a diagram showing a state in which one bristle bundle of the toothbrush according to the present invention is pressed against the cervical region of the tooth. FIG. 11B is an explanatory diagram showing a conventional toothbrush with one bristle bundle pressed against the same area, and FIG. Fig. 12 (b) is an explanatory drawing showing the state in which one bristle of a conventional toothbrush is pressed against the same area, and Fig. 13 shows the major axis and short axis of an ellipsoidal spherical body. It is a graph showing changes in plaque removal rate and gingival irritation index when the diameter ratio is changed. 1: filament, 2: spherical body, 3: envelope surface,
4: pit and fissure, 5: tooth neck, 6: tooth surface, 7: gingiva, 8: interdental area.

Claims (1)

[Claims for Utility Model Registration] (1) A toothbrush having spherical bodies formed at the bristles, characterized in that the spherical bodies have an ellipsoidal shape when viewed from the side. (2) The toothbrush according to claim 1, wherein the spherical bodies having an ellipsoidal shape when viewed from the side are distributed in one hair bundle and have different major axes. (3) The toothbrush according to claim 2, wherein among the spherical bodies having an ellipsoidal shape in side view distributed in one hair bundle, the spherical body located at the outermost periphery has the largest length. (4) The above-mentioned practical use in which the major axis of the spherical bodies located in the center is set smaller than the major axis of the spherical bodies located in the outer periphery among the spherical bodies having an ellipsoidal shape in side view distributed in one hair bundle. The toothbrush according to claim 3 of the patent registration claim. (5) Claims 1, 2, and 3 of the above-mentioned utility model registration claims in which the envelope surface connecting the vertices of the spherical body having an ellipsoidal shape in side view distributed in one hair bundle is a flat surface or a smooth curved surface. The toothbrush according to item 1 or 4. (6) The toothbrush according to claim 5, wherein the envelope surface connecting the vertices of the spherical body having an ellipsoidal shape when viewed from the side has a convex shape toward the tip of the bristles.