JP5178529B2 - toothbrush - Google Patents

Description

The present invention relates to an improvement of a toothbrush in which a bristle bundle of brushes is folded in half and a flat wire is sandwiched between them to be implanted in a flock hole.
This application claims priority on December 28, 2006 based on Japanese Patent Application No. 2006-356539 filed in Japan, the contents of which are incorporated herein by reference.

  The basic functions of the toothbrush include an oral cleaning effect and a massage effect. In order to improve the basic functions of toothbrushes, interdental penetration, cleaning feeling, massage and the like have been added. In order to increase the added value of such a toothbrush, a specification in which the arrangement and shape of the flock holes, the type and shape of the brush, the hair cutting shape of the hair bundle, and the like are generally effective.

However, in the case of a flat wire flocking method in which the bristles of a brush are folded in half and a retaining tool called a flat wire is sandwiched between them and fixed to the flocked hole, in order to ensure the strength of the head part, It is necessary to secure a certain distance or more from the edge of the head portion to the outermost flocked hole, and there is a limit in realizing a complicated pattern arrangement of the flocked holes. In addition, even when combining multiple flocking holes with different shapes, types and shapes of brushes, and hair-cutting shapes of hair bundles, the flocking process is performed in multiple steps, so that production efficiency and cost are reduced. There are many challenges.
JP 2001-29137 A

  Therefore, the present invention has been proposed in view of such conventional circumstances, and its purpose is to provide a variety of toothbrushes such as oral cleaning effects and massage effects, interdental penetration, brushing feeling, and massage properties. An object of the present invention is to provide a toothbrush that conforms to the appeal of various functions, can understand the appeal effect even in appearance, and has a high degree of design freedom.

  In order to achieve this object, the invention according to the first aspect of the present invention includes a head portion in which a plurality of flocking holes are provided on a flocked surface, and the bristles of a brush are folded in two and sandwiched therebetween. A toothbrush in which the bristle bundle is planted in the tuft hole by driving a flat wire into the tuft hole, and a bristle constituted by at least three bristle bundles on the tuft surface of the head portion. A bundle group is provided, and the direction of the flat line of each of the hair bundles constituting the hair bundle group is sandwiched between the direction in which one enclosed region is defined by the extension line of each flat line or the extension line of each flat line. It is a toothbrush characterized by being set in the direction which divides the defined area.

  Moreover, the invention which concerns on a 2nd aspect WHEREIN: The 1st half hair | bristle bundle planted in one area | region of the flock hole in which the hair | bristle bundle which comprises the said hair | bristle bundle group is divided | segmented on both sides of the said flat line, It is comprised from the 2nd half hair bundle planted in the other area | region, and either one of the said 1st or 2nd half hair bundle is located inside the said surrounding area | region. It is a toothbrush of the 1st mode.

  Moreover, the invention which concerns on a 1st aspect WHEREIN: The said 1st half-hair bundle and the said 2nd half-hair bundle are the length of a brush, the thickness of a brush, and the tip shape of a brush on both sides of the said flat line. It is a toothbrush of the 1st or 2nd aspect characterized by either form differing.

  Moreover, the invention which concerns on a 4th aspect is a toothbrush in any one of the 1st-3rd aspect characterized by the said hair bundle group being provided with two or more by the flocked surface of the said head part.

  The invention according to a fifth aspect is the toothbrush according to the fourth aspect, wherein among the plurality of hair bundle groups, adjacent hair bundle groups share at least one hair bundle. is there.

  Further, in the invention according to the sixth aspect, at least one hair bundle is implanted inside the hair bundle group, and the direction of the flat line of the hair bundle is on the extension of the flat line. The toothbrush according to any one of the first to fifth aspects, characterized in that it is set in a direction in which the flock holes of the hair bundles constituting the hair bundle group are not located.

  Moreover, the invention which concerns on a 7th aspect WHEREIN: Any of the 1st-6th aspect characterized by the flocking hole of at least one part hair bundle being continuous among the hair bundles which comprise the said hair bundle group. This is a toothbrush.

  As described above, in the toothbrush according to the present invention, by providing the above-described hair bundle group on the flocked surface of the head portion, a toothbrush such as an intraoral cleaning effect and massage effect, interdental penetration, brushing feeling, and massage properties are provided. It can be adapted to the various functions of the device, the appeal effect can be understood from the appearance, and a flocking form with a high degree of design freedom can be obtained. Furthermore, since the form of the hair bundle constituting the above-mentioned hair bundle group is made different for each half-hair bundle, it is more changed than the case where the form of the hair bundle is made different for each hair bundle (planted hole) as in the prior art. It can be made into a flocking form rich in the surface. Therefore, according to the present invention, it is possible to achieve high functionality and high added value as a toothbrush according to the intended use. Moreover, since the flocking process does not become complicated, it is advantageous in terms of production efficiency and cost.

  Further, in the toothbrush according to the present invention, the orientation of the flat line of each hair bundle constituting the hair bundle group and the orientation of the flat line of the hair bundle located inside the hair bundle group are set in the above-described direction. It is possible to prevent cracking when a flat wire is driven into the pores. Furthermore, since the space | interval between adjacent flock holes can also be narrowed, a more dense hair bundle group can be comprised. On the other hand, even if it is a relatively simple flocking hole pattern arrangement in which the distance between adjacent flocking holes and the distance from the edge of the head portion to the outermost flocking hole is secured to a certain level or more, the above-described change in flocking form A rich toothbrush can be realized.

FIG. 1 is a side view showing an example of a toothbrush to which the present invention is applied. FIG. 2 is a side view showing a head portion of the toothbrush shown in FIG. FIG. 3 is a plan view showing a head portion of the toothbrush shown in FIG. FIG. 4 is a plan view for explaining the hair bundle group of the present invention. FIG. 4 is a plan view for explaining the hair bundle group of the present invention. FIG. 4 is a plan view for explaining the hair bundle group of the present invention. FIG. 4 is a plan view for explaining the hair bundle group of the present invention. FIG. 5 is a plan view illustrating the hair bundle group of the present invention. FIG. 5 is a plan view illustrating the hair bundle group of the present invention. FIG. 5 is a plan view illustrating the hair bundle group of the present invention. FIG. 5 is a plan view illustrating the hair bundle group of the present invention. FIG. 5 is a plan view illustrating the hair bundle group of the present invention. FIG. 5 is a plan view illustrating the hair bundle group of the present invention. FIG. 5 is a plan view illustrating the hair bundle group of the present invention. FIG. 6A is a plan view showing a modified example of the flocked hole of the present invention and before flocking. FIG. 6B shows a modified example of the flocked hole of the present invention, and is a plan view after the flocking. FIG. 6C is a longitudinal sectional view showing a modification of the flock hole of the present invention. FIG. 7 is a plan view showing a head portion of another toothbrush to which the present invention is applied. FIG. 8A is a plan view illustrating the tip shape of a brush. FIG. 8B is a plan view illustrating the tip shape of the brush. FIG. 8C is a plan view illustrating the tip shape of the brush. FIG. 8D is a plan view illustrating the tip shape of the brush.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toothbrush 11 Handle part 12 Head part 12a Flocked surface 13 Hair bundle 13a First half-hair bundle 13b Second half-hair bundle 14 Brush 15 Flat line 16 Flocked holes 20, 21, 30, 40, 50, 60, 80, 90,100 Hair bundle group 70 Head portion 71,72 Hair bundle group

Hereinafter, a toothbrush to which the present invention is applied will be described in detail with reference to the drawings.
In the drawings used in the following description, in order to make the features easy to understand, there are cases in which the portions that become the features are schematically shown for convenience, and the dimensional ratios of the respective components are not always the same as the actual ones. Absent. Moreover, illustration of a brush is abbreviate | omitted depending on the case, and only the flock hole in which the bristles of a brush are flocked is shown.

FIG. 1 is a side view showing an example of a toothbrush 1 to which the present invention is applied, and FIG. 2 is a side view showing an enlarged main part of the toothbrush 1 shown in FIG.
As shown in FIG. 1, the toothbrush 1 includes a long handle portion 11 and a head portion 12 formed integrally with the handle portion 11 at the distal end of the handle portion 11. The handle portion 11 is a portion that is gripped by the user, and a plurality of hair bundles 13 are implanted in the head portion 12.

  Although it does not specifically limit as a material which comprises the handle | steering-wheel part 11 and the head part 12, For example, a polypropylene, polyethylene, a polyethylene terephthalate, a polycyclohexylene dimethylene terephthalate, a saturated polyester resin, polymethyl methacrylate, a cellulose propionate, a polyurethane, Examples thereof include synthetic resin materials such as polyamide and ABS (acrylonitrile, butadiene, styrene). Further, a flexible resin such as an elastomer may be partially or wholly formed on the handle portion 11 to improve gripping properties. The shape, size, design, and the like of the handle portion 11 and the head portion 12 are not particularly limited, and can be arbitrarily changed according to the intended use of the toothbrush 1. Further, the toothbrush 1 may be formed by separately forming the handle portion 11 and the head portion 12.

As shown in an enlarged view in FIG. 2, the hair bundle 13 bundles a plurality of brushes (filaments) 14 and folds them in half, and sandwiches a retaining tool called a flat wire 15 between them to sandwich one surface (flocked hair). Surface) by being driven into a flock hole 16 provided in 12a. Further, a plurality of flocking holes 14 are provided on the flocking surface 12 a of the head portion 12, and a hair bundle 13 of the brush 14 is planted in each of the flocking holes 16.
The bristles 13 are usually formed by bundling a plurality of brushes 14 in a substantially circular shape. However, the bristles 13 are not limited to bundling in a substantially circular shape, but are bundled in a substantially polygonal shape such as a substantially triangular shape or a substantially rectangular shape. In addition, a bundle of different shapes having a major axis and a minor axis such as a substantially elliptical shape, a substantially elliptical shape, a substantially rectangular shape, or a substantially polygonal shape may be used.

  The material of the brush 14 is not particularly limited. For example, polyamide (eg, 6-12 nylon, 6-10 nylon), polyester (eg, polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate), polyolefin (eg: Examples thereof include synthetic resin materials such as polypropylene) and elastomers (eg, olefin-based and styrene-based). A plurality of these resin materials may be used in combination. For example, different resin materials may be used for the core and the sheath, such as a core-sheath structure.

  The cross-sectional shape of the brush 14 is usually circular, but is not limited to such a shape. For example, an elliptical shape, a triangular shape, a rectangular shape, a hexagonal shape, a star shape, a three-leaf clover shape, Depending on the intended use of the toothbrush 1 such as a clover-shaped clover, any shape can be used.

  Moreover, about the shape of the brush 14, you may use the thing with an outer diameter substantially the same except the round part of a hair tip, and use the taper-shaped thing which an outer diameter becomes thin gradually as it goes to a hair tip. Also good. Furthermore, the tip shape of the brush 14 may be any shape such as a spatula shape, FIG. 8B taper shape, FIG. 8C spherical shape, or FIG. 8D tip shape as shown in FIG.

  The hair length of the brush 14 is preferably 8 mm to 13 mm for adults and 6 mm to 9 mm for children from the flocked surface 12 a of the head portion 12. The thickness (maximum diameter) of the brush 14 is preferably 0.12 mm to 0.26 mm from the viewpoint of usability in the oral cavity and usability. Further, considering a feeling of use, a feeling of brushing, a cleaning effect, durability, and the like, a plurality of brushes having different thicknesses may be used in any combination.

  The flat line 15 is placed in the flock hole 16 so as to pass through the center of the flock hole 16 and straddle the flock hole 16. Examples of the material of the flat wire 15 include metals such as brass and stainless steel, and other examples include hard plastic and biodegradable plastic. The flat wire 15 has a length larger than the diameter of the flocked hole 16 and a width smaller than the depth of the flocked hole 16. Further, the length, width, and thickness of the flat wire 15 may be arbitrarily adjusted according to the hair bundle 13 and the flock hole 16. In particular, by adjusting the thickness of the flat wire 15, the hair bundle 13 can be securely fixed in the flock hole 16 and the gap can be reduced. Further, in order to prevent the flat wire 15 from coming out of the flocked hole 16, the total length of the portions protruding from both sides of the flocked hole 16 is preferably 0.3 to 0.6 mm.

On the flocked surface 12a of the head part 12, a plurality of circular flocked holes 16 are usually arranged in a lattice or staggered pattern at predetermined intervals in the length direction or the width direction of the head part 12. There are no particular limitations on the arrangement and spacing of 16, combinations thereof, and the like, and any change can be made according to the intended use of the toothbrush 1.
The depth of the flocking hole 16 is preferably 2.8 to 4.0 mm. Further, the cross-sectional shape of the flock hole 16 is usually circular in accordance with the shape of the hair bundle 13 in which the above-described brush 14 is bundled, but is not limited to such a shape. It can be made into arbitrary shapes according to the shape of the bundled hair bundle 13.

By the way, in the toothbrush 1 to which the present invention is applied, as shown in FIG. 3, a bristle bundle group 20 composed of three bristle bundles 13 is provided on the flocked surface 12 a of the head portion 12.
Specifically, the direction of the flat line 15 of each hair bundle 13 constituting the hair bundle group 20 is defined by dividing each triangular enclosed region by an extension line of each flat line 15 as shown in an enlarged view in FIG. 4A. The direction is set.

  Moreover, the hair bundle 13 which comprises the hair bundle group 20 is planted in the 1st half hair bundle 13a planted in one area | region of the flock hole 16 divided | segmented on both sides of the flat line 15, and the other area | region. The second half hair bundle 13b. And the 1st half hair | bristle bundle 13a of each hair | bristle bundle 13 is located inside the surrounding area divided by the flat line 15 of the three hair | bristle bundles 13. FIG.

  Furthermore, a step is formed at the tip of each hair bundle 13 between the first half hair bundle 13a and the second half hair bundle 13b. That is, the length of the brush 14 is longer in the first half-hair bundle 13a than in the second half-hair bundle 13b. When making the length of the brush 14 different between the first half-hair bundle 13a and the second half-hair bundle 13b, the folding position of the brush 14 folded in half with the above-described flat line 15 is changed. do it.

  Moreover, it is preferable that the height difference of the brush 14 of the 1st half-hair bundle 13a and the 2nd half-hair bundle 13b shall be 0.5-2.0 mm. If the height difference is less than 0.5 mm, the functional and visual effects due to the different lengths of the brush 14 are insufficient. On the other hand, when the height difference exceeds 2.0 mm, the operability of the toothbrush 1 in the oral cavity is deteriorated.

  In the hair bundle group 20 constituted by the three hair bundles 13 as described above, the first half hair bundles 13a of the hair bundles 13 are adjacent to each other toward the center thereof. That is, while the first half-hair bundle 13a having a hair length longer than that of the second half-hair bundle 13b supports each other, the center portion of the hair bundle group 20 is located above the surrounding second half-hair bundle 13b. The shape protrudes in a substantially triangular prism shape.

  Further, as shown in FIG. 3, circular flock holes 16 having a diameter of 1.6 mm, for example, are arranged in a staggered pattern on the flocked surface 12a of the head portion 12, and the bunch bundle group 20 is configured as one configuration. As a unit, a plurality of hair bundle groups 20 are provided over the entire surface of the flocked surface 12a.

  In the toothbrush 1 to which the present invention is applied, the bristles 20 are provided on the flocked surface 12 of the head portion 12 so that the circular flock holes 16 described above are arranged in a staggered manner, and the strength of the head portion 12 is ensured. Therefore, the distance between the adjacent flock holes 16 and a relatively simple pattern arrangement of the flock holes 16 in which the distance from the edge of the head portion 12 to the outermost flock hole 16 is more than a certain value are complicated. It can be set as a characteristic flocking form. In particular, it is possible to enhance the functionality of the toothbrush 1 having both interdental penetration and a feeling of brushing.

  Moreover, in the toothbrush 1 to which the present invention is applied, the orientation of the flat line 15 of each bristle bundle 13 constituting the bristle bundle group 20 is set to a direction in which one enclosed region is defined by an extension line of each flat line 15. Thus, it is possible to prevent cracking when the flat wire 15 is driven into the flock hole 16. Furthermore, since the space | interval between the adjacent flock holes 16 can also be narrowed, the denser hair | bristle bundle group 20 can be comprised.

  Specifically, among the hair bundles 13 constituting the hair bundle group 20, the distance between the flock holes 16 in which the adjacent hair bundles 13 are planted (the innermost distance between the flock holes) is If it is a range in which the strength can be secured, it is preferable to narrow it further. Specifically, it is preferably in the range of 0.6 to 1.0 mm. If the distance is less than 0.6 mm, it is difficult to ensure the strength of the head portion 12, while the distance is 1. When it exceeds 0 mm, the space | interval between each hair | bristle bundle 13 which comprises the hair | bristle bundle group 20 will become large too much, and the function as a complicated characteristic hair transplantation form mentioned above will fall. In particular, in the case of the hair bundle group 20 shown in FIG. 4A, it becomes difficult for the pointed portion formed by the first half hair bundle 13a of each hair bundle 13 described above to enter between one narrow tooth. The interpenetration and the feeling of brushing are reduced.

  Moreover, it is preferable that the diameter of the flock hole 16 is 1.6 mm or more. If the diameter of the flocked hole 16 is less than 1.6 mm, the area occupied by the enclosed region of the one hair bundle group 20 with respect to the flocked surface 12a of the head portion 12 becomes too small, and the above-described complicated characteristic flocked form As a result, the function will deteriorate.

  On the other hand, as in the hair bundle group 22 shown in FIG. 4C, the direction of the flat line 15 of each hair bundle 13 constituting this hair bundle group 22 intersects with the extension line of each flat line 15 inside the hair bundle group 22. When the flat wire 15 is driven into the flock hole 16, the flat wires 15 are too close to each other inside the hair bundle group 22, so that the inner portion may be cracked. The sex becomes very high.

  Moreover, when the form of the hair bundle 13 which comprises this hair bundle group 23 is varied for every hair bundle (planting hole) like the hair bundle group 23 shown to FIG. 4D, the arrangement | sequence of the hair transplanting hole 16 is complicated. As a result, the number of flock holes 16 also increases, which makes it difficult not only to form a denser bundle of hair bundles, but also to reduce the strength of the head portion 12. Moreover, since it is very difficult to make the hair-fusing form equivalent to the hair | bristle bundle group 20 shown to FIG. 4A in one hair cutting process, production efficiency and cost will also deteriorate.

  In addition, this invention is not necessarily limited to the thing of the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention. In addition, in the following description, about the site | part equivalent to the said toothbrush 1, while omitting description, the same code | symbol shall be attached | subjected in drawing.

  For example, in the toothbrush 1, the second half hairs of the respective hair bundles 13 are arranged on the inner side of the surrounding area defined by the flat lines 15 of the three hair bundles 13 as in the hair bundle group 21 shown in FIG. 4B. It is good also as a structure in which the bundle 13b is located. In other words, any one of the first half-hair bundle 13a and the second half-hair bundle 13b may be arranged inside the enclosed region.

  Further, the first half-hair bundle 13a and the second half-hair bundle 13b are different in the thickness of the brush 14, the tip shape of the brush 14 and the like in addition to the above-described form in which the length of the brush 14 is different. It is good also as a form. For example, in the hair bundle group 20, when the tip of the first half hair bundle 13a having a hair length longer than that of the second half hair bundle 13b is tapered, further interdental penetration and brushing are performed. It is possible to achieve high functionality as the toothbrush 1 having both real feeling.

Moreover, in this invention, about the number of the hair | bristle bundles which comprise a hair | bristle bundle group, what is necessary is just at least 3 or more, and can be arbitrarily changed according to the objective use of a toothbrush.
For example, as shown in FIG. 5A, the hair bundle group 30 can be constituted by four hair bundles 13, and as shown in FIG. 5B, the hair bundle group 40 can also be constituted by four hair bundles 13. . In either case, the direction of the flat line 15 of each of the hair bundles 13 constituting the hair bundle group 30 and 40 is set to one enclosed region (in the case of FIG. 5A, a quadrangle in FIG. 5B, as shown in FIG. 5B). In the case of pentagon).

  In addition, when manufacturing the toothbrush of this invention, the direction (driving angle) of the flat line 15 with respect to the flock hole 16 can be freely set by using a flocking device as described in Patent Document 1, for example. .

Moreover, in this invention, the structure which the adjacent hair bundle groups 20 and 21 share at least 1 or more hair bundle 13c may be sufficient like the hair bundle group 50 shown, for example in FIG. 5C.
In this case, the hair bundle 13c located at the boundary between the adjacent hair bundle groups 20 and 21 constitutes both of these adjacent hair bundle groups 20 and 21.
As described above, in the hair bundle group 50, the adjacent hair bundle groups 20 and 21 partially overlap each other, so that it is possible to obtain a more varied hair transplantation form.

When adjacent hair bundle groups share at least one or more hair bundles 13c, the hair bundle 13c is composed of the first half hair bundle 13a and the second half hair bundle 13b across the flat wire 15. It is not necessarily limited to having different forms.
For example, when the adjacent hair bundle groups 20 and 20 partially overlap each other like the hair bundle group 60 shown in FIG. 5D, the hair bundle 13d positioned at the boundary between the adjacent hair bundle groups 20 and 20 is a flat line 15. In some cases, the first half-hair bundle 13a and the second half-hair bundle (shown as the second half-hair bundle 13a in FIG. 5D) have the same shape.

The hair bundle group 60 shown in FIG. 5D can also be viewed as a case where one hair bundle 13 d is implanted inside the hair bundle group 30 constituted by the four hair bundles 13.
In this case, in the hair bundle 13d inside the hair bundle group 30, the first half-hair bundle 13a and the second half-hair bundle 13a have the same form across the flat wire 15. The direction of the flat line 15 of the hair bundle 13d is set in a direction in which the flock holes 16 of the hair bundles 13 constituting the hair bundle groups 20 and 20 are not located on the extended line of the flat line 15.
Thereby, the crack at the time of driving the flat wire 15 of the hair | bristle bundle 13d in the flock hole 16 can be prevented. Furthermore, since the space | interval between the adjacent flock holes 16 can also be narrowed, the more dense hair | bristle bundle group 20 and 20 can be comprised.
As described above, in the hair bundle group 60, the hair bundle 13 d can be implanted inside the hair bundle group 30, so that it is possible to obtain a more varied form of hair transplantation.
When at least one hair bundle 13d is implanted inside the hair bundle group, the hair bundle 13d includes the first half hair bundle 13a and the second half hair bundle 13b across the flat wire 15. Are not limited to having the same form, but may have different forms.

Further, in the present invention, for example, a hair bundle group 20 constituted by three adjacent hair bundles and at least one hair bundle group 31 constituted by four hair bundles, such as a hair bundle group 80 shown in FIG. 5E. The structure which shares the above-mentioned hair | bristle bundle 13e may be sufficient.
In this case, the hair bundle 13e located at the boundary between the adjacent hair bundle groups 20 and 31 constitutes both the adjacent hair bundle groups 20 and 31.
As described above, in the hair bundle group 80, the adjacent hair bundle groups 20 and 31 partially overlap each other, so that it is possible to obtain a more varied hair transplantation form.

  Further, the hair bundle group as a feature does not necessarily have to be a region closed by an extension of a flat line, and may be a region sandwiched by the extension of a flat line. There is no need for a flat line along the short axis direction and the long axis direction of the flocked surface. For example, as shown in FIG. 5F, the flat line 15 of the hair bundle group 90 that is characteristic is formed at the same oblique angle. The half-hair bundle 13a and the second half-hair bundle 13b may be driven at 180 degrees from each other.

  Furthermore, in the present invention, for example, as shown in FIG. 5G, the flat line 15 of the hair bundle group 100 which is a feature is not only along the short axis direction or the long axis direction of the flocked surface, but also the flat line 15 is inclined in the oblique direction. The structure which makes it continuous and forms a series of shapes may be sufficient.

Moreover, in this invention, as shown, for example in FIG. 6, the structure where the flock hole 16 of at least one part of the hair | bristle bundle 13 which comprises the hair | bristle bundle group 22 is continuing may be sufficient. Specifically, the four flocking holes 16 shown in FIG. 6A are configured to be continuous with each other via a connecting hole 16a provided inside the four flocking holes 16.
In the case of this configuration, as shown in FIG. 6B, since the flat wire 15 is not driven into the inner region of the four flock holes 16, the flock holes 16 of the bristles 13 constituting the flock group 22 are continuously connected. Can be configured.
Moreover, since the space | interval between the adjacent flock holes 16 can further be narrowed when the flock holes 16 continue, the hair bundle groups 20 and 20 that are more dense can be configured.
Further, as shown in FIG. 6C, the connection hole 16 a may be formed shallower than the flock hole 16 of the hair bundle 13 constituting the hair bundle group 22. In this case, the depth of the connecting hole 16a is preferably 1.0 to 3.0 mm. As a result, the appearance of flocking and the fluffing in the connecting hole 16a can be kept good. The connecting hole 16a may be formed at the same depth as the flocking hole 16.

FIG. 7 is a plan view showing another toothbrush 70 to which the present invention is applied.
As shown in FIG. 7, the toothbrush 70 has a plurality of bristle bundle groups 71 and 72 constituted by six bristle bundles 13 on the flocked surface 12 a of the head portion 12.
Specifically, the direction of the flat line 15 of each hair bundle 13 constituting the hair bundle groups 71 and 72 is set to a direction in which one rectangular enclosing region is defined by an extension line of each flat line 15. Moreover, since the adjacent hair bundle groups 71 and 72 share the two hair bundles 13c, the adjacent hair bundle groups 71 and 72 are provided so as to partially overlap. Moreover, the 1st half hair | bristle bundle 13a of each hair | bristle bundle 13 is located inside the surrounding area divided by the flat line 15 of the six hair | bristle bundles 13 of the hair | bristle bundle group 71. FIG. On the other hand, the second half hair bundle 13b of each hair bundle 13 is located inside the enclosed area defined by the flat lines 15 of the six hair bundles 13 of the hair bundle group 72. Further, a step is formed at the tip of each hair bundle 13 between the first half hair bundle 13a and the second half hair bundle 13b. That is, the length of the brush 14 is longer in the first half-hair bundle 13a than in the second half-hair bundle 13b.
In the toothbrush 70 configured as described above, the adjacent hair bundle groups 71 and 72 are partially overlapped, so that it is possible to obtain a more varied flocking form, interdental penetration and a feeling of brushing. It is possible to achieve high functionality as a toothbrush 70 having both.

  As described above, in the toothbrush of the present invention, the hair bundle group is provided on the flocked surface 12a of the head portion 12 so that the oral brush has a cleaning effect and a massage effect, interdental penetration, brushing feeling, massage, and the like. It can be adapted to the various functions of the device, the appeal effect can be understood from the appearance, and a flocking form with a high degree of design freedom can be obtained. Furthermore, since the form of the hair bundle 13 constituting the hair bundle group is made different for each half-hair bundle, it is more than the case where the form of the hair bundle is made different for each hair bundle (planted hole) as in the prior art. A variety of flocking forms can be obtained. Therefore, according to the present invention, it is possible to achieve high functionality and high added value as a toothbrush according to the intended use. Moreover, since the flocking process does not become complicated, it is advantageous in terms of production efficiency and cost.

  Moreover, in the toothbrush of this invention, the direction of the flat line 15 of each bristle bundle 13 which comprises the said bristle bundle group, and the direction of the flat line 15 of the bristle bundle 13 located inside the said bristle bundle group are set to the said direction. By doing so, the crack at the time of driving the flat wire 15 in the flock hole 16 can be prevented. Furthermore, since the space | interval between the adjacent flock holes 16 can also be narrowed, the denser hair | bristle bundle group can be comprised. On the other hand, even if it is the pattern arrangement of the comparatively simple flocking hole 16 which ensured the space | interval between the adjacent flocking holes 16, and the distance from the edge of the head part 12 to the outermost flocking hole 16 more than fixed value, it was mentioned above. It is possible to realize a toothbrush rich in changes in flocking form.

  In the toothbrush of the present invention, among the hair bundles planted on the flocked surface of the head portion, for the hair bundles other than the hair bundles constituting the hair bundle group, the above-described brush hair bundle is folded in half, In addition to the flat wire flocking method in which a flat wire is sandwiched and fixed to the flocking hole, the lower end of the hair bundle is press-fitted into the molten resin that becomes the head part and fixed, or the lower end of the hair bundle is heated. After the molten lump is formed, it may be implanted using an in-mold method or the like in which the molten resin is filled into the mold cavity and molded integrally with the head portion.

  The present invention is not limited to the oral brushes such as the above-described toothbrushes, and is widely applied to brushes in which the bristles of a brush are folded in half and a flat wire is sandwiched between them to be implanted in a flock hole. Is possible.

Claims (5)

A head portion having a plurality of flock holes provided on the flocked surface; the bristles of the brush are folded in half; and a flat wire sandwiched therebetween is driven into the flock holes so that the follicles are planted in the flock holes. A toothbrush provided,
A hair bundle group composed of at least three hair bundles is provided on the flocked surface of the head portion, and the direction of the flat line of each hair bundle constituting the hair bundle group is an extension of the respective flat line. It is set in a direction to divide one enclosed area by a line, or a direction to divide an area sandwiched between extension lines of a flat line ,
The hair bundles constituting the group of hair bundles are a first half hair bundle planted in one region of a flock hole divided across the flat line, and a second hair bundle planted in the other region. It consists of a half hair bundle,
Either one of the first or second half hair bundles is located inside the enclosed region,
The first half-hair bundle is different from the second half-hair bundle in any one of the length of the brush, the thickness of the brush, and the shape of the tip of the brush across the flat line. The toothbrush described.  The toothbrush according to claim 1, wherein a plurality of the hair bundle groups are provided on the flocked surface of the head portion. The toothbrush according to claim 2 , wherein among the plurality of hair bundle groups, adjacent hair bundle groups share at least one hair bundle.  At least one or more hair bundles are implanted inside the hair bundle group, and the direction of the flat line of the hair bundle is the extension of the flat line of the hair bundle group constituting the hair bundle group. The toothbrush according to claim 1, wherein the toothbrush is set in a direction in which the flocking hole is not located.  The toothbrush according to claim 1, wherein the flock holes of at least some of the hair bundles of the hair bundle group are continuous.

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