JP5468832B2 - toothbrush - Google Patents

Description

  The present invention relates to a toothbrush.

As a technique for preventing slippage between a toothbrush and a finger, it is known to provide a non-slip unevenness on the toothbrush.
For example, in Patent Document 1, a finger pad made of a rubber material is raised from the surface of the handle portion on the front side and the back side of the handle portion of the toothbrush body having a head portion with a flocked portion, a neck portion, and a handle portion. A toothbrush provided in the state is described.
Patent Document 2 describes a toothbrush in which a non-slip rib formed of an elastomer or the like is provided on a curved surface of a handle of the toothbrush.
On the other hand, Patent Document 3 discloses a toothbrush in which a hole is provided in the middle between a place held in the hand of a toothbrush and a flocked portion.

JP 2003-275027 A JP 2001-275751 A Japanese Utility Model Publication No. 47-14368

In the toothbrush described in Patent Document 1, since the finger contact part is formed in a dome shape that rises from the surface of the handle part into a convex curved surface, the finger is difficult to be placed on the convex curved surface, Fingers are easy to place. For this reason, the raised portion of the convex curved surface is often used as a stopper against axial displacement.
Moreover, although the toothbrush described in Patent Document 2 is provided with narrow ribs formed of an elastomer or the like and the height of the ribs adjusted, the finger contact becomes worse when the ribs are made higher. Conversely, as in the ribs specifically shown in Patent Document 2, if the height is lowered, a sufficient anti-slip effect cannot be obtained, and adjustment is difficult.

  The hole formed in the toothbrush described in Patent Document 3 accommodates bubbles generated during brushing and prevents bubbles from being held in the hand, so one large hole that is long in the axial direction is formed. ing. If you have a hole in your hand, your fingers will be bad and it will be difficult to brush your teeth.

  Accordingly, an object of the present invention is to provide a toothbrush having a high anti-slip effect, good finger contact and easy brushing operation.

  The present invention is a toothbrush having a brush portion, a handle portion, and a neck portion that connects the brush portion and the handle portion, in which the hair bundle is implanted on the front side of the flocking table, the handle portion in the axial direction of the handle portion At least on the front side of the part where the thumb hits, the shape of the cross section perpendicular to the axial direction of the handle part has a convex curved surface part that protrudes outward, and a depression consisting of a through hole or a concave part that opens to the convex curved surface A toothbrush is provided in which a plurality of portions are formed at intervals in the axial direction of the handle portion.

  The toothbrush of the present invention has a high anti-slip effect, good finger contact, and easy brushing operation.

It is a figure (front view) which shows the surface of the front side of the toothbrush which is one Embodiment of this invention. It is an AA line expanded sectional view of the toothbrush shown in FIG. It is a BB line expanded sectional view of the toothbrush shown in FIG. It is a perspective view which shows the state which gripped the toothbrush shown in FIG. 1 by the palm grip method. It is a figure (figure 2 equivalent figure) which shows other embodiment of this invention. It is a figure (FIG. 2 equivalent figure) which shows other embodiment of this invention. It is a figure (FIG. 2 equivalent figure) which shows other embodiment of this invention. It is a figure (FIG. 2 equivalent figure) which shows other embodiment of this invention. It is a figure (FIG. 2 equivalent figure) which shows other embodiment of this invention.

The present invention will be described below based on preferred embodiments with reference to the drawings.
FIG. 1 is a view showing a toothbrush 1 according to an embodiment of the present invention.
The toothbrush 1 has a brush part 2 in which a hair bundle 22 is implanted on the front side of the flocking table 21, a handle part 3, and a neck part 4 that connects the brush part 2 and the handle part 3. In the toothbrush 1 of the present embodiment, a plurality of tuft holes (not shown) are provided on one surface of the flocking table 21, and tufts that are bundles of bristle made of synthetic resin such as polyethylene and nylon are provided in each tuft hole. (Hair bundle) is implanted and fixed.
In the present invention, the side of the toothbrush 1 having the bristle bundle 22 (surface side shown in FIG. 1) is the front side, and the opposite side (see FIG. 2) is the back side.

The handle portion 3 is a portion that the user has when using the toothbrush 1, and is wider in front view than the neck portion 4 continuous with the brush portion 2, and the sectional area (see FIG. 2) is also increased. Yes. This cross-sectional area is the area of a cross section by a plane orthogonal to the axial direction (X direction) of the toothbrush or handle, and when the cross section has a depressed portion or a hollow portion, the sectional area of the depressed portion or the hollow portion is also Including cross-sectional area.
The neck part 4 has a narrower width in front view than the brush part 2 and the handle part 3, and the cross section perpendicular to the axial direction is also smaller.

As shown in FIG. 1, the handle 3 of the toothbrush 1 has a portion 31 (hereinafter also referred to as a thumb grip portion 31) where the thumb hits a portion near the neck 4 in the axial direction (X direction) of the handle 3. doing.
The thumb grip part 31 is a part where the thumb 5 hits when the toothbrush 1 is gripped by the palm grip method as shown in FIG. As shown in FIG. 4, the palm grip method is a method of holding the handle 3 so as to wrap the handle 3 with a palm. In the present invention, the portion 31 on which the thumb hits includes not only the front surface 31a of the handle 3 with which the thumb directly contacts, but also the corresponding back surface 31b. The width W31 of the thumb grip 31 is preferably 1.5 to 5 times the minimum width W4 of the neck 4 in front view.

  Moreover, the thumb grip part 31 is a range from the position from which the distance L31 from the rear end 37 of the handle | pattern part 3 is 30 to 70% with respect to the full length (maximum length) L1 of the toothbrush 1 to a neck part, for example. The distance L31 is more preferably in a range of 40 to 60% with respect to the total length (maximum length) L1 of the toothbrush 1. The thumb grip portion 31 is a portion that is 1.5 times or more the minimum width W4 of the neck portion 4 in the portion that continues from the neck portion 4 to the handle portion 3, and is used as a boundary between the neck portion 4 and the handle portion 3. What is the area | region (2-4 cm) length of the 1st joint of the thumb 5 toward the rear end 37 of the handle | pattern part 3 from a boundary is preferable.

As shown in FIGS. 1 to 3, the toothbrush 1 of the present embodiment has a cross-sectional shape (see FIG. 2) perpendicular to the axial direction (X direction) of the handle portion 3 on the front side of the thumb grip portion 31. It has a convex curved surface portion P that forms a convex arcuate shape (upward in FIG. 2). In the present embodiment, the convex curved surface portion P has a cross-sectional shape (see FIG. 3) along the axial direction (X direction) of the handle portion 3 and also has a convex arc shape outward (upward in FIG. 3). ing.
The convex curved surface portion P has a radius of curvature r in a cross section perpendicular to the axial direction (X direction) of the handle portion 3 of 2 to 20 mm, particularly 5 to 15 mm. It is preferable from the point.

1 to 3, the thumb grip portion 31 has a recessed portion 32 formed of a through-hole that opens in the convex curved surface portion P with an interval in the axial direction (X direction) of the handle portion 3. A plurality are formed.
As shown in FIG. 4, when the toothbrush 1 is gripped by placing the belly of the thumb 5 against the convex curved surface part P of the thumb grip part 31, a part of the belly of the thumb 5 enters the recessed part 32 at a plurality of locations. An arcuate upper surface 33 a (see FIG. 2) of the partition wall (partition portion) 33 existing between the depressions 32 bites into the belly of the thumb 5. Thereby, a high frictional force is generated between the thumb grip portion 31 and the thumb 5, and an excellent anti-slip effect is obtained between the thumb grip portion 31 and the thumb 5.

  In addition, since the plurality of depressed portions 32 are provided in the state separated by the partition portion 33 on the convex curved surface portion P, a wide range of the tip of the thumb 5 or the belly of the thumb 5 may enter one depressed portion 32. It is also easy to brush the toothbrush 1 while the finger 5 is in contact with the convex curved surface portion P with the belly of the thumb 5 on it.

  In the depressed portion 32, an interval a between adjacent depressed portions 32 in the axial direction (X direction) of the handle portion 3 (same as the thickness of the partition wall 33 in the present embodiment, see FIG. 3) is 1 to 3 mm. Preferably, it is 1.5 to 2.5 mm. By setting the distance a to 1 mm or more, the arcuate upper surface 33a of the partition wall (partition part) 33 does not bite into the belly of the thumb 5, and the contact with the fingers is further improved. On the other hand, when the distance a is 3 mm or less, the arc-shaped upper surface 33a of the partition wall (partition portion) 33 bites into the belly of the thumb 5 appropriately, and the friction between the thumb grip portion 31 and the thumb 5 is high. A force is generated, and a more excellent anti-slip effect is obtained between the thumb grip portion 31 and the thumb 5. By setting the distance a to 1 to 3 mm, it is possible to achieve both an excellent anti-slip effect and good finger contact at a high level.

Moreover, it is preferable that the dimension b (refer FIG. 3) of the axial direction of the handle | pattern part 3 is 2-6 mm, and, as for the depression part 32, it is 3-5 mm more preferably. By setting the dimension b to 2 mm or more, the tip of the thumb 5 and the belly of the thumb 5 enter the recessed portion 32 moderately, and a high frictional force is generated between the thumb grip portion 31 and the thumb 5. An even better anti-slip effect can be reliably obtained between 31 and the thumb 5. On the other hand, when the dimension b is set to 6 mm or less, the belly of the thumb 5 comes into contact with the partition walls (partition portions) 33 on both sides of the depressed portion 32, and the tip of the thumb 5 and the thumb are brought into one depressed portion 32. It is possible to prevent the wide range of the belly of 5 from entering, and to further improve the operability of finger contact and brushing.
In addition, it is preferable that ratio (a / b) of the space | interval a and the dimension b is 0.2-1.0, especially 0.3-0.7.

Further, in the toothbrush 1 of the present embodiment, the depressed portion 32 formed of a through hole has a handle portion 3 as compared with the dimension b of the longest portion in the axial direction (X direction) of the handle portion 3 with respect to one depressed portion 32. The dimension c (see FIG. 2) of the longest portion in the direction orthogonal to the axial direction is large. Specifically, the shape of the opening is a long hole when viewed from the front. The thumb 5 is brought into contact with the arcuate upper surface 33a of the depressed portion 32 or the partition wall (partition portion) 33 in a wide range to increase the frictional force between the thumb grip portion 31 and the thumb 5, and the thumb grip portion 31. In view of obtaining a more excellent anti-slip effect between the thumb 5 and the thumb 5, it is preferable that the shape of the depressed portion 32 is long in the lateral direction of the handle portion 3 (direction orthogonal to the X direction in front view). .
From the viewpoint of obtaining an excellent anti-slip effect, the ratio (b / c) of the dimension b in the axial direction (X direction) of the depression 32 and the dimension c in the orthogonal direction is preferably 0.1 to 1.3. Further, from the viewpoint of securing as many depressed portions 32 as possible in the axial direction (X direction), the flat depressed portion having the ratio (b / c) of 0.2 to 1.0, particularly 0.2 to 0.9. 32 is preferable.

  Moreover, the recessed part 32 which consists of a through-hole is the back side from the surface of the convex-curved-surface part P of the front side in the center part in the width direction of the handle | pattern part 3 (thum grip part 31) from a viewpoint of obtaining the outstanding anti-slipping effect. It is preferable that the depth d to 31b (refer FIG. 2) is 2 mm or more, and it is more preferable that it is 3-15 mm. The depth d in this case is a depth from a virtual surface that extends smoothly from the adjacent depressed portion 32 of the convex curved surface portion P to the back side of the thumb grip portion.

The toothbrush 1 according to the present embodiment will be further described. The toothbrush 1 has a convex curved surface when the toothbrush 1 is gripped by the palm grip method as shown in FIG. A second convex curved surface portion P2 having the same configuration as the portion P is formed. That is, the second convex curved surface portion P2 also has a cross-sectional shape orthogonal to the axial direction (X direction) having a convex arc shape outward, and the axial direction (X direction) of the handle portion 3 The shape of the cross section along it has a circular arc shape that protrudes outward.
A plurality of depressed portions 35 similar to the depressed portions 32 are also formed on the second convex curved surface portion P2 at intervals in the axial direction (X direction) of the handle portion 3. This further prevents slippage between the toothbrush 1 and the hand.

  When the toothbrush 1 is gripped by the palm grip method, the portion 34 against which the middle finger 6, the ring finger 7 or the little finger 8 touches is located on the rear end 37 side of the thumb grip portion 31 in the axial direction of the handle portion 3. The portion 34 is preferably designed to be an intermediate region between the thumb grip portion 31 and the rear end 37. Further, as shown in FIG. 1, the handle portion 3 has a small width in front view between the thumb grip portion 31 and the portion 34 against which the middle finger 6, the ring finger 7, or the little finger 8 hits, and the axial direction of the handle portion 3. It is preferable to have a constricted portion 36 having a small cross-sectional area orthogonal to the cross section.

As mentioned above, although one Embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, in the toothbrush 1 described above, the thumb grip portion 31 is provided with the depressed portion 32 formed of a through hole, but instead of the hole penetrating from the front side to the back side, for example, as shown in FIG. It is also possible to provide a depressed portion 32 ′ composed of a concave portion with a bottom portion. From the viewpoint of obtaining an excellent anti-slip effect, the recessed portion 32 ′ formed of a concave portion has a depth d1 (see FIG. 5) at the center portion in the width direction of the handle portion 3 that is closer to both ends in the width direction of the handle portion. It is preferable that it is deeper than d2 and d2.

The recessed portion 32 ′ shown in FIG. 5 formed of a concave portion has a substantially U-shaped cross section orthogonal to the axial direction of the handle portion 3, with the front side open, and the width direction of the handle portion 3 (FIGS. 2 and 5). (The left-right direction of each figure of FIG. 9) and the horizontal bottom face part, but the shape of the recessed part 32 'which consists of a recessed part can be changed suitably.
For example, as shown in FIG. 6, you may have a bottom face part of the shape which descends from the both ends of the width direction of the handle | pattern part 3 toward the center part of the width direction. 6 (a) has a bottom surface having a substantially V-shaped cross section perpendicular to the axial direction of the handle 3, and FIG. 6 (b) has a bottom having an arc shape in the cross section. Has a part. In the embodiment shown in FIG. 6B, the depressed portion is formed on the back side with the same width as the depressed portion 32 ′ on the front side.

From the viewpoint of obtaining an excellent anti-slip effect, the depth d1 of the central portion in the width direction of the handle 3 is preferably 2 mm or more, and more preferably 3 to 10 mm. When the thumb 5 is applied to the thumb grip 31, it is preferable that the depressed portion 32 ′, which is formed of a concave portion of the thumb 5, does not come into contact with the bottom of the central portion of the depressed portion 32 ′. Moreover, the number of the recessed parts 32 and 32 'provided so that it may open to the convex curve part P should just be two or more, It is preferable to provide about 3-10 pieces, More preferably, it is 3-7 pieces.
Further, the depressed portion 32 made of a through hole and the depressed portion 32 ′ made of a concave portion can be provided in combination. In this case, the sum of both may be plural.

Moreover, the convex curved surface part P in the thumb grip part 31 can also be provided in the back side of the thumb grip part 31, as shown in FIG. Further, as shown in FIG. 8, the thumb grip portion 31 may be on both the front side and the back side.
Further, as shown in FIG. 9A, the depressed portion 32 formed of the through hole is provided so that the area of the opening is different between the front side and the rear side, or as shown in FIG. A constricted portion in which the cross-sectional area perpendicular to the axial direction of the through hole is small in 32 can also be provided.

  In the toothbrush of the present invention, even if the anti-slip material is not provided by the elastomer material, an excellent anti-slip effect can be obtained by the depressed portion 32 (32 ′) provided in the thumb grip portion 31, so that the brush portion The flocking table 21, the neck 4 and the handle 3 can be integrally formed of synthetic resin, and a toothbrush having a non-slip effect can be manufactured with a small number of steps. Furthermore, the anti-slip effect can be further improved, the feel can be improved, or an anti-slip portion made of an elastomer material can be provided at a desired site from the viewpoint of design.

  According to the present invention, it is possible to provide a toothbrush having a high anti-slip effect and easy brushing operation.

1 toothbrush 2 brush part 3 handle part 31 thumb grip part (part where thumb hits)
32 Depressed part consisting of through-hole 32 'Depressed part consisting of concave part 33 Partition wall 34 Part where middle finger, ring finger or little finger hits 4 Neck part 5 Thumb 6 Middle finger 7 Ring finger 8 Little finger P Convex surface part P2 Second convex surface part

Claims (5)

A toothbrush having a brush part in which a hair bundle is implanted on the front side of the flocking table, a handle part, and a neck part that connects the brush part and the handle part,
The handle portion has a convex curved surface portion having a cross-sectional shape perpendicular to the axial direction of the handle portion convex outwardly at least on the front side of a portion where the thumb hits in the axial direction of the handle portion. In addition, a plurality of depressions formed by through holes or recesses opening in the convex curved surface portion on the front side are formed at intervals in the axial direction of the handle portion,
The depressed part has an axial dimension of 2 to 6 mm of the handle part,
The depressed portion has a depth at a central portion in the width direction of the handle portion that is deeper than a depth at a portion near the both ends in the width direction of the handle portion,
The depth of the depressed portion is a distance from an opening opening to the convex curved surface portion to a bottom portion of the concave portion when the depressed portion is formed of the concave portion, and the depressed portion is formed of the through hole. In this case, the toothbrush is a distance from one end opening that opens to the convex curved surface portion to the other end opening that opens to the back side of the handle. Said recess being formed with a plurality of said handle portion, the spacing of the recess adjacent in the axial direction of the該柄portion (a), the axial dimension of the handle portion in the depressed portion (b) The toothbrush according to claim 1, wherein the ratio (a / b) is 0.2 to 1.0.   The toothbrush according to claim 1 or 2, wherein the depressed portion has an interval between adjacent depressed portions in the axial direction of the handle portion of 1 to 3 mm. The said depression part has a dimension (c) of the direction orthogonal to this axial direction in the said depression part larger than the dimension (b) in the axial direction of the said handle | pattern part in the said depression part. The toothbrush according to claim 1.   The convex surface portion of the front side has a cross-sectional shape along the axial direction of the handle portion, and has a circular arc shape protruding outward. Toothbrush.

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