JPH0141305Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to various brushes such as toothbrushes, hairbrushes, clothes brushes, etc., and particularly relates to brushes whose bristle tufts are variable in density, hardness, and softness.

Conventionally, in brushes such as toothbrushes, the shape of the bristles has been devised in consideration of ease of use in order to effectively brush the teeth, or bristles or soft bristles have been used in consideration of the relationship with the gums. It has been proposed to change the density of blitzles. However, devising the shape of the brittle or making the brittle coarser and denser, or harder and softer, is a fixed function of each brush, and the user can arbitrarily change the function as necessary. It was not possible.

This invention was made in order to eliminate such drawbacks seen in conventional brushes, and it consists of at least one continuous groove from one end to the other on the back surface of the substrate 2, which has bristles 3 implanted on the top surface. 4 so that the flocked substrate 2 can be bent freely along the groove 4, and the width of the groove 4 is narrowed in a part, and the length of the flocked substrate 2 is narrowed along the groove 4 in another part. The operating frame 8 is curved outward perpendicular to the direction and slides along the groove 4 on the substrate 2.
By inserting the bristle into the bristle and expanding the width of the groove 4 which has been narrowed by the operating frame 8, or by freely pushing the outwardly curved bristle-planted substrate 2 inward, the density, hardness and softness of the bristle can be arbitrarily changed. , is characterized by providing diversity in the functions of the brush.

Preferred embodiments of this invention will be described in detail below with reference to the drawings. Although the drawing shows a toothbrush to which this invention is applied, it is needless to say that the invention is not limited to this, and can be applied to various brushes such as hair brushes, clothes brushes, shoe brushes, etc.

In the figure, reference numeral 1 denotes the handle of the brush, which is in the shape of a rod having a desired length suitable for gripping, and a bristle-planted substrate 2 on which bristles 3 are implanted is integrally and continuously formed at the tip. Two grooves 5 are formed on the back surfaces of the handle 1 and the flocked substrate 2, leaving a thin continuous section 4 on the surface.
are formed continuously and parallel from one end to the other.
The continuous portion 5 has bendable flexibility, and the groove 5
By bending the continuous portion 5 in the direction of expanding or contracting, the upper surfaces of the handle 1 and the flocked substrate 2 are curved into a convex or concave state.

Reference numeral 6 denotes an expansion actuating part formed at a suitable position in the middle of the handle 1, and as shown in Fig. 3, the left and right handle parts left uncut by the groove 4 are curved to narrow the width of the groove 4 toward the center. formed into a shape. Reference numeral 7 denotes a contraction operation part formed at an appropriate distance from the expansion operation part 6, and as shown in FIG. It is formed into a curved shape that protrudes from both sides of 1. 8 is pattern 1
The operating frame is slidably inserted in the longitudinal direction of the handle and has a short cylindrical shape with a substantially rectangular cross section.
inserted around the outer periphery of the Both sides of the operating frame 8 are shaped slightly wider than the central part, allowing the handle 1 to curve convexly or concavely. The inner surface of the operating frame 8 has a protrusion 9 that fits into the groove 4 .

As shown in FIG. 3, when the operating frame 8 is positioned between the expanding operating section 6 and the contracting operating section 7, the handle 1 is neither expanded nor contracted, but only as shown in FIG. Eventually, the flocked surface of the flocked substrate 2 is in a horizontal state, and the brittle 3 has an average density and stiffness. When the operating frame 8 is slid to the left in FIG. 3 and positioned at the expansion operating portion 6, the left and right handles that narrow the width of the groove 4 are pushed outward by the protrusion 9, so that the groove 4 expands, and the handle 1 curves upward into a concave state as shown in FIG. For this reason, the brittle 3 that has been flocked on the flocked substrate 2 is inclined toward the center, and the tips thereof are brought into contact with each other, resulting in a dense state and increased stiffness. In addition, when the operating frame 8 is slid to the right in FIG. 3 and positioned at the reduction operating section 7, the left and right handle parts protruding from the outer surface of the handle 1 are pushed inward by the operating frame 8. As shown in FIG. 8, the handle 1 reduces the width of the groove 4 and
The upper surface is curved upward in a convex manner. For this reason, the brittle 3 that has been flocked to the flocked substrate 2 is inclined outward, and the tip thereof is expanded, so that when the brittle becomes rough, the stiffness is also reduced. In the above embodiment, the flocked substrate 2 and the handle 1 are integrally and continuously formed, and both can be expanded or contracted at the same time, but it is also possible to expand or contract only the flocked substrate 2, or the groove
Of course, it is fine if there is only one.

As described above, according to the brush of this invention, at least one groove 4 is formed continuously from one end to the other end on the back surface of the substrate 2 on which bristles 3 are implanted on the upper surface, and the bristle implanted substrate 2 is connected to the groove. 4, the width of the groove 4 is narrowed in a part, and in another part, the flocked substrate 2 is curved outward perpendicularly to the longitudinal direction of the groove 4. , a flocked substrate 2 in which an operating frame 8 that slides along the groove 4 is fitted into the substrate 2, and the narrowed width of the groove 4 is widened or curved outward by the operating frame 8.
Since the brittle can be pushed inward to make the brittle denser or spread out, the density of the brittle can be easily varied, and the stiffness of the brittle can be changed by changing the density. It is possible to substantially change the brush to either hard or soft, and its function can be changed arbitrarily depending on how the brush is used.

[Brief explanation of the drawing]

Fig. 1 is a plan view, Fig. 2 is a side view, Fig. 3 is a bottom view, Fig. 4 is a cross-sectional view taken along line -, Fig. 5 is a cross-sectional view taken along line - Fig. 3, and Fig. 6 is a sectional view taken along line -. The figure is an end view showing the handle in a non-expanded state, FIG. 7 is a view similar to FIG. 6 showing the handle in an expanded state, and FIG. 8 is a view similar to FIG. 6 showing the handle in a reduced state. . DESCRIPTION OF SYMBOLS 1... Handle, 2... Flocking board, 3... Blitzle, 4... Groove, 5... Continuous section, 6... Expansion operating section, 7... Reduction operating section, 8... Operating frame, 9 ……
protrusion.

Claims (1)

[Scope of utility model registration request] At least one groove 4 is formed continuously from one end to the other end on the back surface of the substrate 2 which has brittle 3 flocked on the upper surface.
is formed so that the flocked substrate 2 can be bent freely along the groove 4, and the width of the groove 4 is narrowed in some parts, and the flocked substrate 2 is bent along the groove 4 in the other part. An operating frame 8 which is curved outward perpendicular to the groove 4 and slides along the groove 4 is fitted into the substrate 2, and the width of the groove 4 which has been narrowed by the operating frame 8 is widened or extended. A brush characterized in that a flocked substrate 2 curved in the direction can be freely pushed inward.