JPH06304020A - Tooth brush - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a toothbrush that can be repeatedly used by exchanging a part of it when the brush is worn out, and the part that is discarded at the time of replacement can be reduced, resulting in high economical efficiency and resource saving. To achieve. A flocking shell 3 is formed by forming a core part 24 at the tip of a handle 21 and flocking a brush 41 to a shell member 31 having a hollow part 32 into which the core part 24 can fit.
0, and the core body portion 24 of the handle 21 and the shell member 3
The hollow portion 32 of No. 1 is fitted to brush the teeth, and when the brush 41 is worn out, the entire bristle implant shell 30 can be replaced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a toothbrush, more specifically,
The present invention relates to a toothbrush that can be repeatedly used by exchanging only a brush-implanted portion on which a brush is implanted.

[0002]

2. Description of the Related Art In a toothbrush, when the brush is worn out, the tips of the brush expand and it is difficult to brush the tooth properly. For this reason, the toothbrush is judged to have reached the end of its useful life when the brush becomes worn, and replacement is recommended. However, when replacing the toothbrush, not only the brush but also the entire handle must be replaced, and there are many discarded parts such as resin when replacing, improving from an economical point of view and resource saving point of view. Was requested.

Therefore, in order to improve economy and the like, a toothbrush has been proposed in which the head portion on which the brush is planted can be replaced. In this toothbrush, the head part on which the brush is planted is detachably separated from the handle part by the neck part, etc., and when the brush is worn out, only the head part can be replaced and used again. is there.

[0004]

However, in the above-mentioned conventional toothbrush, since the head part and the handle part are separated by the neck part, the entire head part must be replaced at the time of replacement and is discarded. There are still many resin parts, and improvements in economic efficiency have not yet been satisfactory. Further, it is indispensable for the toothbrush to apply not only an axial force but also a rotational force to the neck portion and the like when brushing teeth, so that the separated portion of the toothbrush can bear the above force while maintaining the flexibility of the neck portion. For this reason, there is a problem that the structure of the neck portion becomes complicated, the attaching / detaching operability is deteriorated, and the manufacturing cost is increased. The present invention has been made in view of the above problems, and an object of the present invention is to provide a toothbrush that can be further improved in economical efficiency and the like, has excellent detachability, and can be manufactured at low cost.

[0005]

To achieve the above object, in a toothbrush according to the present invention, a brush is planted on the lower surface side of the brush shell main body, and a front fitting recess is formed from the upper surface side of the brush shell main body. A brush shell in which a concave fitting portion is formed and a groove is formed on a side wall in the longitudinal direction of the concave fitting portion, and the concave groove is formed on both sides of a handle tip portion having a shape that fits into the concave fitting portion of the brush shell. And a handle provided with a protruding ridge portion that engages.

[0006]

With the toothbrush according to the present invention, when the brush is worn out, it is sufficient to replace the brush shell formed by planting the brush on the thin brush shell body, and the portion to be discarded can be extremely reduced. It can achieve high economic efficiency and resource saving. Further, since the brush shell is held in the concave fitting portion such that the handle front end portion engages the convex strip portion with the concave groove of the concave fitting portion so that the brush shell can be attached and detached and replaced, good detachability can be obtained with a simple structure.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a toothbrush according to an embodiment of the present invention, in which FIG. 1 is a front view of the toothbrush, FIG. 2 is a rear view around a head portion of the toothbrush, and FIG. 3 is a front view of a part of a handle. FIG. 4 is a rear view of a part of the handle, FIG. 5 is a side cross-sectional view of the flocked portion, and FIG. 6 is an explanatory view of a detached state.

1 and 2, reference numeral 10 denotes a toothbrush. The toothbrush 10 has a handle 21 and a brush shell 30 in which a brush 41 is planted, and the brush shell 30 is detachably attached to the handle 21. Composed. The handle 21 has a grip portion 22, a neck portion 23, and a core body portion (tip portion) 24, and the grip portion 22, the neck portion 23, and the core body portion 24 are integrally formed in a rod shape with a resin such as polypropylene. The grip portion 22 has a uniform thickness dimension (in FIG. 1,
Vertical dimension. Hereinafter, they are referred to as the top and bottom or the front and back direction. ), The neck portion 23 has a smaller thickness dimension and a smaller bending rigidity than the grip portion 22.

As shown in detail in FIGS. 3 and 4, the core portion 24 has a surface side (the lower surface side in FIG. 3) cut into a flat shape so that the thickness dimension is smaller than that of the neck portion 23, and a step 24a is formed. Neck 2
It is divided into three. The core body portion 24 has a first narrow portion 25 on the side of the neck portion 23, which has substantially the same width dimension as the neck portion 23 (vertical dimension in FIG. 4, hereinafter referred to as left or right or side).
Adjacent to the tip side of the first narrow portion 25, the first wide portion 26 having a large width dimension, and the first wide portion 26.
A second narrow portion 27 adjacent to the tip side of the second narrow portion 27, and a second wide portion 28 having a width dimension substantially equal to that of the first wide portion 26 adjacent to the tip side of the second narrow portion 27. Further, it has a diving portion 29 at the tip.

The first narrow portion 25 has the same width dimension as the neck portion 23 and is continuous with the neck portion 23 in a straight line. The first wide portion 26 has a widened portion 26b that widens in a tapered shape on the side of the first narrow portion 25, and is partitioned from the first narrow portion 25 by the widened portion 26b. The second narrow portion 27 has the first
And the second wide portion 28 and the second wide portion 26 are divided into steps. The diving portion 29 has a semi-arcuate shape whose thickness dimension is smaller than that of the second wide portion 28.
An inclined surface 29d that is inclined toward the front surface side of the tip is formed on the upper surface on the 8th side, and is partitioned from the second wide portion 28 by the inclined surface 29d.

The first wide portion 26, the second narrow portion 27 and the second wide portion 28 each have a ridge (projection portion) 26 extending in the longitudinal direction of the handle 21 on both side surfaces.
a, 27a, 28a are formed in a straight line. The core portion 24 as a whole has a shape that can be fitted into a recessed fitting portion of the brush shell 30 described later, and the protrusions 26a, 27a, 28a can be locked in correspondence with the groove of the brush shell 30 described later. Has been formed.

The brush shell 30 is shown in FIGS. 2, 5 and 6.
As shown in FIG. 3, a thin shell-like shell member (brush shell body) 31 having a substantially rectangular shape in plan view, in which a recessed fitting portion 32 is formed,
The bristles 41 are bundled into a plurality of bristles 40 on the flocked surface of the surface of the shell member 31 to be flocked. That is, the shell member 31 includes the front wall 31a on the front surface side and the front wall 31a
The thin wall 31 includes a side wall 31b standing upright from the peripheral portion and a back wall 31c that partially covers the back end side.
The concave fitting portion 32 is defined by a, 31b, and 31c, and the brush 41 is planted on the surface of the front wall 31a. The core member 24 of the handle 21 is detachably fitted into the recessed fitting portion 32 of the shell member 31, and the shell member 31 is replaceably assembled to the handle 21.

The concave fitting portion 32 has a partial arc shape in which the back surface side and the right side in FIG. 2 (hereinafter referred to as the base end side) are open, and the left and right inner wall surfaces are curved so as to approach each other on the back surface opening side. , The protrusions 26a, 27 of the core body 24 on the inner wall surface.
A groove 32a corresponding to a and 28a is formed. The recessed fitting portion 32 has a first narrow portion 35 (for the sake of convenience, hatched in the drawing) 35 on the opening side, and the first narrow portion 35.
Adjacent to the tip side of the first wide portion 36, and adjacent to the tip side of the first wide portion 36 of the second narrow portion 37.
The second wide portion 38 is provided adjacent to the tip side of the second narrow portion 37, and the overhang portion (front fitting recess) 39 is provided on the tip side.

The concave fitting portion 32 is formed by the respective portions 35, 36, 3
7, 38, 39 are respectively formed so as to be able to be fitted to the portions 25, 26, 27, 28, 29 corresponding to the shapes complementary to the respective portions 25, 26, 27, 28, 29 of the core portion 24 described above, It is molded so that it can be fitted with the core portion 24 as a whole. That is, the first narrow portion 35 is formed so that the first narrow portion 25 can be fitted in a complementary shape with the first narrow portion 25 of the core body portion 24. Similarly, the first wide portion 36
Has a tapered portion 36b and is formed so as to be able to be fitted in a complementary shape with the first wide portion 26 of the core body portion 24.

Further, the second narrow portion 37 is formed so that it can be fitted into the second narrow portion 27 of the core portion 24 in a complementary shape.
The second wide portion 38 is the second narrow portion 38 of the core body portion 24.
It is formed so that it can be fitted to the complementary shape. The back side (upper side in FIG. 1) of the overhang portion 39 is covered with a back wall 31c and is formed so as to be able to be fitted in a complementary shape with the submerged portion 29 of the core body portion 24. An inclined surface 39d corresponding to the inclined surface 29d of the submerged portion 29 is formed at the edge of the back wall 31c.

The brush shell 30 has a structure as shown in FIGS.
It can be manufactured as shown in FIG. First, in the method shown in FIG. 11, the brush 41 is bundled in a bunch of hair 40, and the root portion of this bunch of hair 40 is heated and fused so that a thin plate-shaped fused portion 40a is formed. Then, the hair bundle 41 having the melting portion 41a at the root is placed in the molding die of the shell member 31, and molten resin is injected into the molding die to fix the shell member 31 at the same time,
That is, the brush shell 30 is formed by insert molding.

Further, in the method shown in FIG. 12, the root portion of the hair bundle 40 is fused in advance so that a hemispherical fused portion 40b is formed, and a concave portion is formed on the surface of the shell member 31 at a position where hair should be planted. 51c is formed. Then, the melted portion 40b of the hair bundle 40 is put into the recess 51c of the shell member 31, and in this state, the heater 52 is heated from the back surface side of the shell member 31 to melt the melted portion 40b of the hair bundle 40 and the shell member 31. To glue.

Further, in the hair-implanting method shown in FIG. 13, hair-implanting holes 51d are formed on the shell member 31 at the position where the hair bundle 40 should be hair-implanted.
Is formed, and the root portion of the hair bundle 40 is passed through the flocked holes 51d until it penetrates to the back surface side, and the root portion of the hair bundle 40 is heated and melted by the heater 52. At this time, if the root portions of the adjacent hair bundles 40 are melted to the extent that they are fused to each other,
It is possible to reliably prevent the tufts 40 from coming off.

Further, in the method shown in FIG. 14, the shell member 31 is formed in a laminated structure in which the surface layer 92a and the back layer 92b are laminated, and first, the surface layer 92a is formed in advance, and the surface layer 92a is formed as shown in FIG. Similarly, the flock hole 51d is formed. Then, after passing the tufts 40 through the tufting holes 51d to the back side, a molten resin is poured onto the back side of the surface layer 92a to form a back layer 92b, and the resin poured at the same time when the back layer 92b is formed. The root portion of the hair bundle 40 is fixed by.

In this embodiment, the core body portion 24 of the handle 21 is fitted to the concave fitting portion 32 of the brush shell 30 so that the brush shell 30 is detachably replaceable.
In the case where the brush 41 that has been planted on the side of the brush 41 has settled, the brush shell 30 can be replaced and used again. Further, since the brush shell 30 is thinly formed by resin injection molding or the like, even when the used brush shell 30 is discarded, the amount of resin to be discarded is extremely small, the economical efficiency can be improved, and resource saving can be achieved. Can be achieved.

When the brush shell 30 is replaced, as shown in FIG. 6, the overhanging portion 3 of the brush shell 30 is indicated by the submerged portion 29 of the core portion 24 as shown by the arrow.
A new brush shell 30 can be attached by fitting the entire core body portion 24 into the recessed fitting portion 32 as shown by the arrow after submerging it in 9. Conversely, the old brush shell 30 can be removed by moving it in the direction of the arrow and then moving it in the direction of the arrow. Therefore, the brush shell 30 can be easily attached and detached and replaced.

When the brush shell 30 is attached to the core portion 24 of the handle 21, the first narrow portion 25 of the core portion 24 is the first narrow portion of the concave fitting portion 32 of the brush shell 30. Similarly, the first wide portion 26 is attached to the first wide portion 36, the second narrow portion 27 is attached to the second narrow portion 37, and the second wide portion 28 is attached to the second wide portion 28. Wide part 38
Further, the submerged portion 29 is fitted into the back wall 31c so as to be submerged in the overhang portion 39, and the protrusions 26a, 27a, 28a are further fitted into the groove 32a. That is, the core portion 24 of the handle 21 and the concave fitting portion 32 of the brush shell 30 are three-dimensionally fitted to each other, and the relative displacement in the vertical and horizontal directions is restricted. Therefore, the brush shell 30 can be firmly fixed to the handle 21, and the brush shell 30 can be reliably prevented from coming off when brushing teeth.

Further, the concave fitting portion 32 of the brush shell 30 described above can be formed by injection molding or the like, and similarly, the core portion 24 of the handle 21 can be integrally formed at the time of molding the handle.
No special processing is required. Therefore, the molding is easy, and the manufacturing cost is low.

7 and 8 show a toothbrush according to another embodiment of the present invention. FIG. 7 is a rear view around the head portion, and FIG. 8 is a rear view of the handle tip. In this embodiment and the embodiments to be described later, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and a part of the description and the drawing are omitted.

In this embodiment, the core portion 24 of the handle 21 is
The concave fitting portion 32 of the brush shell 30 and the concave fitting portion 32 of the brush shell 30 are formed in a "gourd" shape in plan view so that they can be fitted to each other. That is, the core portion 24 has a rectangular first shape in plan view.
Narrow portion 81a, circular first and second wide portion 8
1b and 81d, and a second narrow portion 81c and a submerged portion 81e formed as a constricted portion between the wide portions 81b and 81d. Similarly, the recessed fitting portion 32 also includes the respective portions 81a, 81b, 81c, 81d, 8 of the core body portion 24.
Corresponding to 1e, the first narrow portion 82a, the first wide portion 82b, the second narrow portion 82c, and the second wide portion 82.
d and an overhang portion 82e.

Also in this embodiment, the core body portion 24 is fitted into the concave fitting portion 32 of the brush shell 30, that is, the respective portions 81a to 81e of the core body portion 24 are respectively corresponding to the concave fitting portion 32. The brush shell 30 is removably attached to the handle 21 by being fitted to the portions 82a to 82e. Further, since the brush shell 30 is configured by implanting the brushes 41 on the thin shell-shaped shell member 31, the discarded portion is small even when it is discarded, so that it is possible to improve the economical efficiency and save resources.

Further, FIGS. 9 and 10 show another embodiment of the present invention. FIG. 9 is a rear view around the head portion, and FIG.
0 is a rear view of the tip of the handle. Also in this embodiment, the core body portion 24 has a first narrow portion 83a, a substantially trapezoidal first wide portion 83b, a substantially trapezoidal second wide portion 83d, and a second width formed as a constricted portion. It has a narrow portion 83c and a dive portion 83e, and ridges 26a and 28a are formed on both sides of each of the wide portions 83b and 83d.

Further, each portion 83a to 83e of the core body portion 24
Corresponding to, the concave fitting portion 32 has a first narrow portion 84a, a substantially trapezoidal first wide portion 84b, a substantially trapezoidal second wide portion 84d, a second narrow portion 84c and an overhang portion. 84e. And each wide part 84b, 84d
A groove 32g is formed on both side walls of the.

Also in this embodiment, since the brush shell 30 is formed by implanting the brush 41 on the thin shell member 31, the amount of the discarded portion when discarding can be reduced, which improves the economy and saves money. Resources can be planned.

In each of the above-described embodiments, the brush shell 30 is removably attached to the handle 21 by fitting a plurality of portions of the core body portion 24 into a plurality of portions of the recess fitting portion 32, respectively. However, the core portion 24 and the concave fitting portion 32 are not always required.
It is not necessary to fit and in multiple parts. That is, according to the present invention, it is sufficient that the displacement of the brush shell 30 with respect to the handle 21 can be three-dimensionally regulated during use. Therefore, for example, one portion of the core body portion 24 is provided with the concave fitting portion 3
By fitting one part of 2 so as to prohibit two-dimensional relative displacement, and by fitting one submerged part to the overhang part and prohibiting relative displacement in the orthogonal direction,
The present invention is achieved.

[0031]

As described above, according to the toothbrush according to the present invention, a concave fitting portion is formed on a thin-walled brush shell on which a brush is planted, and the handle distal end is removed from the concave fitting portion of the brush shell. Fit as much as possible. Therefore, the brush shell can be detachably attached to the handle with a simple structure and can be used repeatedly by replacing the brush shell even if the brush is worn out and has reached the end of its life. At that time, the portion to be discarded can be extremely reduced, and the economical efficiency and resource saving can be achieved.

[Brief description of drawings]

FIG. 1 is a front view of a toothbrush according to an embodiment of the present invention.

FIG. 2 is a plan view of the head portion of the toothbrush as seen from the back surface side.

FIG. 3 is a front view of a tip portion of a handle of the toothbrush.

FIG. 4 is a plan view of a front end portion of the handle as viewed from the back surface side.

FIG. 5 is a side sectional view of a brush shell of the toothbrush.

FIG. 6 is a front view for explaining a mounting state of the toothbrush.

FIG. 7 is a plan view of a main part of a toothbrush according to another embodiment of the present invention viewed from the back surface side.

FIG. 8 is a plan view of the handle tip of the toothbrush as seen from the back surface side.

FIG. 9 is a plan view of a main part of a toothbrush according to still another embodiment of the present invention, as viewed from the back surface side.

FIG. 10 is a plan view of the handle tip of the toothbrush as seen from the back surface side.

FIG. 11 is a schematic diagram illustrating one embodiment of a method for implanting a brush of a brush shell of a toothbrush according to the present invention.

FIG. 12 is a schematic diagram illustrating another aspect of the hair transplanting method.

FIG. 13 is a schematic diagram illustrating still another aspect of the hair transplanting method.

FIG. 14 is a schematic diagram illustrating still another aspect of the hair transplanting method.

[Explanation of symbols]

 10 Toothbrush 21 Handle 22 Grasping part 24 Core part (tip part) 30 Brush shell 31 Shell member (brush shell body) 32 Recessed fitting part 41 Brush

Claims (1)

[Claims] 1. A brush is planted on the lower surface side of the brush shell main body, and a concave fitting portion having a front fitting concave portion is formed from the upper surface side of the brush shell main body. It is characterized by comprising a brush shell having a groove formed therein, and a handle provided with ridges for engaging with the groove on both sides of a handle tip end portion having a shape that fits into a concave fitting portion of the brush shell. toothbrush.