JP2014000156A - Toothbrush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toothbrush having conical bristle bundle groups and bundle groups filling in the vertical direction, which has an excellent cleaning property of distal surfaces of innermost molars as well as a cleaning property of occlusal surfaces of teeth and interdental parts, a brushing property of tooth surfaces, and a massaging property of interdental papilla parts.SOLUTION: The toothbrush includes: a quadrangular-pyramid bristle group formed at a tip end of a bristle-filling face of a bristle-filling base by filling four bristle bundles inclinedly in a central direction, the four bristle bundles consisting of two bundles that are adjacent in the longitudinal direction and two bristle bundles are adjacent in the width direction; and a vertical bristle bundle area adjacent to a longitudinal base end side of the bristle-filling base of the quadrangular-pyramid bristle group, the vertical bristle bundle group consisting of a plurality of vertical bristle bundles that fill the bristle-filling face in the vertical direction and, the height of which is lower than the height of the quadrangular-pyramid bristle group.

Description

  The present invention relates to a toothbrush that improves the cleaning ability of the distal surface of a molar in the back of the oral cavity.

  This type of toothbrush has hitherto been difficult to apply the toothbrush head part to the narrow part of the oral cavity due to the volume of the flocking table and the hair bundle, and to approach the hair bundle to the distal surface of the innermost molar. Inevitably had to design long filaments constituting the hair bundle to be implanted at the tip of the flocking table (see Patent Document 1). However, if the filament is designed to be long, the stiffness of the hair bundle will decrease, and the brushing surface will not be applied well during brushing. As a result, the life of the toothbrush was shortened.

  On the other hand, a toothbrush having a group of conical hair bundles formed by inclining a plurality of adjacent hair bundles in the center direction and implanting the plurality of hair bundles so as to form a conical shape as a whole has also been proposed. (See Patent Document 2). By forming such a conical hair bundle group, it is possible to produce a toothbrush having a high cleaning surface, which is the tip portion of the conical hair bundle group, and a hair tip of the hair bundle that is difficult to spread. . If the toothbrush provided with this conical hair bundle group is used, the occlusal surface and the interdental part can be efficiently cleaned. On the other hand, the flocking holes for these conical hair bundles are formed around the flocking hole of the flocking table because the pins inserted in an oblique direction are pulled out vertically when the flocking table is molded and then punched out. The problem was that the damage risk of the flock holes at the time of molding was high. In addition, the conical hair bundle group is suitable for cleaning the interdental part, but since the contact area to the tooth surface is small, the cleaning surface of the hair bundle is difficult to fit the tooth surface, the lip side, the cheek side and It was not suitable for tooth brushing on the lingual side. Furthermore, since the conical hair bundle group is too rigid, it is not suitable for massage of interdental papilla and gums.

  Therefore, a plurality of conical hair bundle groups are provided along the longitudinal direction of the flocking table in the center of the width direction of the flocking table, and the vertical hair bundles are arranged in parallel along the longitudinal direction at the side edges on both sides in the width direction. Such a toothbrush is also proposed (refer patent document 3). In addition to being able to effectively brush the occlusal surface and interdental area with the conical hair bundle group, brushing of the tooth surface on the lip side, buccal side and lingual side is also possible by implanting the vertical hair bundle Can be done effectively. However, conical hair bundles have high cleaning ability such as gaps between teeth, but because of their high rigidity, it is difficult to approach a narrow space in the oral cavity with such a toothbrush, and the molars in the innermost part of the oral cavity. It was extremely difficult to brush the centrifugal surface. Therefore, in addition to the ability to clean the occlusal surface and interdental portion of the teeth, the ability to brush the tooth surface on the lip side, cheek side and lingual side, the ability to massage the interdental papilla, the distal surface of the innermost molar The toothbrush which had the cleaning ability of this was also calculated | required simultaneously.

JP 2002-325632 A JP 59-034209 A Japanese Utility Model Publication No. 02-009128

  In view of the circumstances as described above, the object of the present invention is the ability to clean the occlusal surface and interdental portion of the tooth, the ability to brush the tooth surface, and the ability to massage the interdental papilla, An object of the present invention is to provide a toothbrush that is excellent also in the ability to clean the distal surface of the back molar.

  As a result of intensive studies to solve such problems, the inventors have made a group of quadrangular pyramidal hair bundles planted by inclining four adjacent hair bundles at the tip of the flocking surface of the flocking table in the central direction. A plurality of vertical hair bundles that are adjacent to the base end side in the longitudinal direction of the flock base of the quadrangular pyramidal hair bundle group and have a height lower than that of the quadrangular pyramid hair bundle group and are perpendicular to the flocked surface. By providing a vertical hair bundle region consisting of the above-mentioned quadrangular pyramidal hair bundle group, the centrifugal surface of the innermost molar is efficiently cleaned, the occlusal surface and the interdental portion can be effectively cleaned, and It has been found that the tooth surface can be effectively cleaned by the vertical hair bundle region, and the present invention has been completed.

That is, the gist of the present invention is as follows.
[1] At the tip of the flocking surface of the flocking table, four bristles composed of two bunches adjacent in the longitudinal direction and two flocks adjacent in the width direction at the center in the width direction of the flocking table in the central direction. A quadrangular pyramidal hair bundle group planted in an inclined manner is provided, adjacent to the base end side in the longitudinal direction of the flocking base of the quadrangular pyramidal hair bundle group, and planted perpendicular to the flocked surface, and the quadrangular pyramidal hair bundle A toothbrush comprising a vertical bristle bundle region composed of a plurality of vertical bristle bundles lower than the height of the group,
[2] The toothbrush according to [1], wherein the flocking table has a flat plate tapered shape,
[3] The toothbrush according to [1] or (2), wherein the flocking table has a thickness of 3.6 to 4.6 mm.
[4] In the connecting portion between the toothbrush neck and the handle, the axis of the handle is warped to the back, the axis of the neck is warped to the abdomen, and the shape from the toothbrush neck to the handle is an S-shape. [1] to the toothbrush according to any one of (3),
[5] The toothbrush according to any one of [1] to (4), wherein a rubber resin molded portion is integrally formed on a thumb grip portion near the neck portion of the handle portion,
[6] The toothbrush according to any one of [1] to (5), wherein each hair bundle constituting the quadrangular pyramidal hair bundle group is made of a filament made of polytrimethylene terephthalate.
[7] Two hair bundles adjacent in the longitudinal direction of the flock base adjacent to the base end side of the flock base in the vertical hair bundle region, and planted on the side edge in the width direction of the flock base from these two hair bundles The first triangular pyramid shape in which the triangular pyramidal hair bundle group planted by inclining the three hair bundles made of one hair bundle in the central direction is positioned at least at the edge portions on both sides in the width direction of the flocking table. A second vertical hair comprising a plurality of vertical hair bundles provided perpendicularly to the flocked surface, provided with a hair bundle group region, adjacent to the base end of the first flocked hair bundle region of the first triangular pyramidal hair bundle region A bundle region is provided, adjacent to the base end side of the second vertical hair bundle region, two hair bundles adjacent to each other in the longitudinal direction of the flocking table, and the width direction edge side of the flocking table from these two hair bundles Triangular pyramidal hair bundles planted by tilting three hair bundles made of one hair bundle planted in the center direction at least on both sides in the width direction of the flock base Formed by providing the second triangular pyramid bristle bundle group region is respectively located parts, toothbrush according to any one of [1] to (6),
It is.

  According to the present invention, the pyramidal hair bundle group is provided at the distal end portion of the flocking table, and adjacent to the longitudinal base end side of the flocking table, the conical hair bundle having a lower hair length than the quadrangular pyramidal hair bundle group. By providing a group, the cleaning surface of the toothbrush can easily fit the distal surface of the molars, and the cleaning performance of the distal surface of the innermost teeth, which is generally difficult to clean, is greatly improved. be able to. The quadrangular pyramidal hair bundle group is constructed by inclining four hair bundles in the central direction, so that it has high rigidity and is effective for brushing the occlusal surface and interdental portion. Furthermore, this quadrangular pyramidal hair bundle group has a structure in which four hair bundles are inclined in the central direction, so that the hair bundles are difficult to spread and an effect of extending the life of the toothbrush can be expected. On the other hand, because the conical hair bundle group has a small contact area with the teeth during brushing, it is not suitable for brushing of the tooth surface on the lip side, cheek side, and lingual side. By providing the vertical hair bundle region on the base end side in the longitudinal direction, tooth surface brushing and interdental papilla massage on the lip side, cheek side, and lingual side can be effectively performed.

  Here, by making the flocking base into a flat taper shape, the volume of the toothbrush head portion is reduced, and it becomes easier to approach the toothbrush head portion to the teeth at the back of the oral cavity, and consequently the brushing of the centrifugal surface of the innermost molar. Is also possible.

  The biggest problem when molding a toothbrush flocking table with conical hair bundles is that the axial direction of the flock holes are not all the same, so when the mold is cut after molding, so-called It is “unreasonable” and is easy to damage the flocked hole. However, by forming the hair follicle table to a relatively thin thickness of 3.6 to 4.6 mm, the hair bundle is firmly planted using a flat wire, and the flock hole portion of the flock base is damaged. It is possible to perform die cutting. And by thinly molding the flocking table, not only can the risk of damage at the time of die-cutting after molding be reduced, but the volume of the toothbrush head part is reduced, so that the brushing of the molar teeth existing in the back of the oral cavity is also possible It becomes easy.

  Further, in the connecting portion between the toothbrush neck and the handle, the shaft of the handle is warped to the back, the shaft of the neck is warped to the abdomen, and the shape from the toothbrush neck to the handle becomes an S-shape. By doing so, it becomes easy to brush the distal surface of the molars without disturbing the molars in front.

  By integrally forming a rubber resin molding part at least on the thumb grip part near the neck part of the toothbrush handle part, it is possible to facilitate brushing with a small stroke that is considered to be highly cleanable.

  The quadrangular pyramidal hair bundle group is suitable not only for the brushing of the distal surface of the farthest molars but also for the occlusal surface and interdental brushing, as long as it has not only high rigidity but also high durability More preferred. Therefore, the material of the filaments of the hair bundles constituting the quadrangular pyramid hair bundle group is not easily deformable and poorly durable nylon, but highly durable polytrimethylene terephthalate (hereinafter abbreviated as PTT). More preferably.

  Further, adjacent to the base end side of the hair flock base in the vertical hair bundle region, two hair bundles adjacent to each other in the longitudinal direction of the flock base, and the width direction edge side of the flock base than these two hair bundles. The first triangular pyramidal hairs, each of which has a triangular pyramidal hair bundle group planted by inclining three hair bundles made of one hair bundle in the center direction, at least at the side edges on both sides in the width direction of the flocking table A second vertical hair bundle comprising a plurality of vertical hair bundles provided perpendicularly to the flocked surface, provided with a bundle group region, adjacent to the proximal end of the first flocked hair bundle region of the first triangular pyramidal hair bundle region An area is provided, adjacent to the proximal end side of the second vertical hair bundle area, two hair bundles adjacent to each other in the longitudinal direction of the flocking table, and closer to the side edge in the width direction of the flocking table than these two hair bundles Triangular pyramidal hair bundles planted by inclining three hair bundles made of one hair bundle planted in the center direction at least on both sides in the width direction of the flocking table By providing a second triangular pyramidal hair bundle group region located at each of the parts, the ability to clean the interdental part when brushing the tooth surface on the lip side, cheek side and lingual side, and the occlusal surface The cleaning ability can be improved.

(A) is the top view which looked at the toothbrush head part in this invention from the stomach side, (b) is the perspective view of the toothbrush head part in this invention. The side view which looked at the toothbrush from the side. The top view which looked at the handle | pattern part of a toothbrush from the ventral side. (A) is the top view which looked at the head part of the modification of the toothbrush in this invention from the ventral side, (b) is the perspective view of the head part of the modification of the toothbrush in this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIG. 1, the toothbrush 1 according to the present invention has two hair bundles adjacent to each other in the longitudinal direction and two hair bundles adjacent to each other in the width direction in the center portion of the flocking table width direction at the tip of the flocking surface 13 of the flocking table 12. Only one quadrangular pyramidal hair bundle group 14 is constructed by inclining four hair bundles composed of the hair bundles in the center direction, and the quadrangular pyramid hair bundle is perpendicular to the flocked surface 13 on the base end side. A vertical hair bundle region 15 in which a plurality of hair bundles having a hair length shorter than that of the group 14 is implanted is provided.

  When planting the four hair bundles constituting the quadrangular pyramid hair bundle group 14, it is desirable that the inclination angle of each hair bundle is inclined by 1 to 5 degrees from the state perpendicular to the flocked surface. More preferred. Here, the inclination angles of the four hair bundles may be set to be the same, but the present invention is not limited to this, and even if the inclination angles of the four hair bundles are different from each other, A quadrangular pyramid shape may be configured.

  The hair bundles constituting the quadrangular pyramid hair bundle group 14 may be formed so that all the filaments used in the hair bundle have the same length, but the shape of the tip portion of the quadrangular pyramid hair bundle group 14 As shown in FIG. 2, it is desirable to form such that it looks like a mountain when viewed from the side. By doing so, when brushing with the quadrangular pyramidal hair bundle group 14, the contact area between the hair tip of the filament and the tooth surface can be secured larger than in the case of flat cutting, and the cleaning effect is improved. be able to.

  In the quadrangular pyramidal hair bundle group 14, the interval between the centers of the flock holes for planting two hair bundles adjacent in the longitudinal direction at the center in the width direction of the flock base 12 is 2.8 to 4.8 mm. Preferably it is 3.4-4.2 mm, More preferably, 3.6-4.0 mm is good. Moreover, the space | interval of the center of the flock hole for planting two hair | bristle bundles adjacent to the width direction in the width direction center 12 width direction center part is 2.8-4.8 mm, More preferably, it is 3.4-4 .2 mm, more preferably 3.6 to 4.0 mm.

  The quadrangular pyramidal hair bundle group 14 is provided in order to effectively brush the distal surface of the molars and the occlusal surface of the teeth, especially considering the brushing of the distal surface of the molars. It is preferable to have a certain length, and the height from the flocked surface 13 is preferably 9 to 12 mm. The innermost molar in the present invention refers to the third molar when the third molar, the so-called wisdom tooth grows, and the second molar when the third molar does not grow. Point to.

  The thickness of the filament used in the hair bundles constituting the quadrangular pyramid hair bundle group 14 is preferably 5 to 10 mils, and more preferably 7 to 8 mils. The material may be a material such as nylon, which is generally used for a toothbrush filament, but the quadrangular pyramidal bundle 14 should brush the distal surface of the molar and the occlusal surface of the tooth. Therefore, it is more preferable that the PTT has excellent durability.

  A vertical hair bundle region 15 is provided adjacent to the base end in the longitudinal direction of the flock base of the quadrangular pyramidal hair bundle group 14 and perpendicular to the flock surface 13. If the hair bundle in this vertical hair bundle region 15 is long, When brushing the centrifugal surface of the innermost molar in the quadrangular pyramidal hair bundle group 14, it becomes difficult to insert the head portion 11 to the back of the oral cavity. That is, the hair bundle in the vertical hair bundle region 15 is desirably set lower than the height of the quadrangular pyramidal hair bundle group 14 from the flocked surface 13. The difference in height from the flocked surface 13 is preferably 0.8 to 2.0 mm, and more preferably 0.8 to 1.5 mm.

  The material of the filament used for the bristles constituting the vertical bristle bundle region 15 may be the same as the material generally used for toothbrushes, but in order to make it easier to fit the tooth surface. A material having low rigidity may be used. For example, a sponge material is preferably used. As long as the thickness of the filament has the same thickness as a general toothbrush, 5 to 10 mil is preferable.

  In order to facilitate the brushing of the centrifugal surface of the innermost molar, the shape of the flocking table 12 is preferably a shape suitable for inserting the head portion 11 to the back of the oral cavity, specifically, A flat plate taper is desirable. More specifically, the length in the flocking table width direction of the position where two follicles adjacent in the width direction constituting the quadrangular pyramidal hair bundle group 14 are 80% or less of the maximum width of the flocking table. It is desirable to do so.

  The thickness of the flocking table is preferably as thin as possible from the viewpoint that it is necessary to insert the head part 11 to the back of the oral cavity when brushing the distal surface of the molars. Further, from the viewpoint of planting hair bundles on the flocking table 12 using a flat wire, it is necessary to use a flat wire of a certain size in order to secure the hair pulling strength. A thickness of 12 is also required. On the other hand, when the flocking table 12 is formed, the four flocking holes for planting the quadrangular pyramidal hair bundle groups are oriented in different directions. The problem is that damage is likely to occur, and the risk is reduced as the depth of the flock hole is set shallower. In view of the above circumstances, the flock base 12 is preferably set slightly thinner than a general toothbrush, and is preferably 3.6 to 4.6 mm. Examples of the material for the flocking table include polyester, polypropylene, nylon, and polyacetal. However, the material is not limited to this as long as it is formed of a resin used for a flocking table of a general toothbrush.

  Further, as shown in FIG. 2, in the connecting portion 23 between the toothbrush neck portion 21 and the handle portion 22, the axis of the handle portion 22 warps to the back side 25, and the axis of the neck portion 21 warps to the abdomen side 24. By making the shape from the handle portion 22 to the S-shape, the hair bundle, particularly the quadrangular pyramid hair bundle group 14 can easily reach the part even when brushing the distal surface of the distal molar.

  In general, when brushing teeth, brushing in small increments is said to be more cleanable. Further, when brushing the distal surface of the molars, brushing is performed in a state where the head portion 11 is in a narrow space at the back of the oral cavity, which inevitably has to be brushed in small steps. When brushing in small increments, it is particularly preferable that the grip portion has a high grip property. Therefore, as shown in FIG. 3, a rubber resin molded portion 31 is integrated with a portion near the neck portion 21 of the handle portion 22. A molded structure is preferable. Here, the rubber resin may be provided not only on the thumb gripping portion but also on a portion assumed to be gripped by a finger other than the thumb during use, such as an index finger or a little finger.

  As shown in the modification of FIG. 4, in order to more efficiently perform the occlusal surface and interdental brushing of the teeth, the flocking table is adjacent to the proximal end of the vertical flocking region 15. Two hair bundles adjacent to each other in the longitudinal direction of the hair, and three hair bundles made of one hair bundle planted on the side edge in the width direction of the flocking table with respect to these two hair bundles are inclined to the center. The first triangular pyramidal hair bundle group region 41 is provided, in which the triangular pyramidal hair bundle group is located at least at the edges on both sides in the width direction of the flocking table, and the first triangular pyramidal hair bundle group region 41 is provided. Adjacent to the base end side of the flocking table, a second vertical hair bundle region 42 comprising a plurality of vertical hair bundles planted perpendicularly to the flocking surface is provided, and the base end side of the second vertical hair bundle region 42 Two hair bundles adjacent to each other in the longitudinal direction of the flocking table, and planted on the side in the width direction of the flocking table with respect to these two hair bundles. A second triangular pyramidal hair bundle in which triangular pyramidal hair bundles, which are planted by tilting three hair bundles made of one hair bundle in the central direction, are positioned at least at the edges on both sides in the width direction of the flocked base. A group region 43 may be provided.

  When three hair bundles arranged in the first and second triangular pyramidal hair bundle group regions 41 and 43 are implanted, the inclination angle of each hair bundle is 1 from the state perpendicular to the flocked surface. It is desirable to incline by 5 degrees, and 3 degrees is more preferable. The inclination angles of the three hair bundles constituting the triangular pyramid hair bundle group may be the same or different, but the shape of the triangular pyramid is constituted by at least three hair bundles. Just do it.

  In each of the first and second triangular pyramidal hair bundle group regions 41 and 43, between the two triangular pyramidal hair bundle groups provided at the edge portions on both sides in the flocking table width direction, the perpendicular to the flocked surface. The hair bundles that have been planted may be planted, or the hair bundles may not be planted at all, and two triangular pyramidal hair bundle groups that are provided on the edges of both sides in the width direction of the flocking table are adjacent to each other. It may be. In each of the first and second triangular pyramidal hair bundle group regions 41 and 43, between the two triangular pyramidal hair bundle groups provided at the edge portions on both sides in the flocking table width direction, the perpendicular to the flocked surface. When the planted hair bundle is planted, the material, length, and thickness of the vertically planted hair bundle are determined by the vertical hair bundle region 15 or the second vertical hair bundle region 42. Although it may be the same as the hair bundle to constitute, it is not limited to this.

  In the hair bundles constituting the triangular pyramid hair bundle groups respectively arranged in the first and second triangular pyramid hair bundle group regions 41 and 43, the filaments used for the hair bundles all have the same length. The tip of the first and second triangular pyramidal hair bundle group regions 41 and 43 may be cut into a mountain shape when viewed from the side. Is desirable. Thereby, when brushing the tooth surfaces on the lip side, cheek side, and lingual side, the triangular pyramidal hair bundle group can easily fit into the hourglass space, and the interdental portion can be more effectively cleaned. .

  The height of the first and second triangular pyramidal hair bundle groups 41 and 43 from the flocked surface 13 is that the flocking of the quadrangular pyramidal hair bundle group 14 is ensured from the viewpoint of ensuring the cleaning of the distal surface of the distal molars. In comparison with the height from the surface, it is preferable that the height is the same or lower. Further, the height of the first and second triangular pyramidal hair bundle groups 41 and 43 from the flocked surface 13 is such that the interdental portion fits into the hourglass space when brushing the lip side, cheek side and lingual side. From the viewpoint of improving the cleanability of the occlusal surface and improving the cleanability of the depression of the occlusal surface when brushing the occlusal surface, from the flocked surface 12 of the vertical hair bundle region 15 and the second vertical hair bundle region 42 It is desirable that the height is higher than the height. On the other hand, if the height is higher than the vertical hair bundle region 15 and the second vertical hair bundle region 42, the vertical hair bundle region 15 and the second vertical hair bundle are used during brushing on the lip side, cheek side, and lingual side. It becomes difficult for the region 42 to contact the tooth surface. From the above viewpoint, the height of the first and second triangular pyramidal hair bundle groups 41 and 43 from the flocked surface 13 is preferably 9 to 12 mm.

  The vertical hair bundle region 15 and the second vertical hair bundle region 42 may each be one closed region, but depending on the length in the longitudinal direction of the flocking table 12 and the size of the flocking hole, the flocking table width It may be divided into two at both ends in the direction.

  The material of the filament used for the hair bundles constituting the triangular pyramid hair bundle groups respectively arranged in the first and second triangular pyramid hair bundle groups 41 and 43 is, for example, nylon, but other than that However, it may be generally used for a toothbrush or may be PTT. The thickness of the filament should just have the same thickness as a general toothbrush, and 5-10 mil is preferable.

  The bristles constituting the second vertical hair bundle region 42 composed of a plurality of vertical hair bundles planted perpendicularly to the flocked surface, adjacent to the base end of the flock base of the first triangular pyramidal hair bundle group region 41. The material of the filament used for the bundle may be the same as that generally used for toothbrushes, but it may be a material having lower rigidity in order to easily fit the tooth surface. For example, it is also suitable to use a sponge material, for example. The thickness of the filament should just have the same thickness as a general toothbrush, and 5-10 mil is preferable. Moreover, the height from the flocked surface 13 is lower than the triangular pyramidal hair bundle group 14 and the triangular pyramidal hair bundle group arranged in the first and second triangular pyramidal hair bundle group regions 41 and 43. The second vertical hair bundle region 42 is preferably 0.8 to 2.0 mm lower than the first and second triangular pyramidal hair bundle groups, and 0.8 to 1.5 mm lower. More preferred. Here, the material, thickness and length of the hair bundle constituting the second vertical hair bundle area 42 may be the same as the hair bundle in the vertical hair bundle area 15.

  Hereinafter, based on an Example, Embodiment of this invention is described more concretely, This invention is not limited to these.

Example 1
A quadrangular pyramidal group of hair bundles is planted at the tip of the flocking table, a vertical bundling region is provided on the base end side of the flocking table, and the height of the quadrangular pyramidal group of hair bundles from the flocked surface is 10.5 mm. A head portion having a height from the flocked surface of the region of 9.5 mm was produced.

(Comparative Example 1)
All the hair bundles are planted perpendicularly to the flocking surface of the flocking table, and the height from the flocking surface of the hair bundle in the region of 4.4 mm in the longitudinal direction of the cleaning surface at the tip of the flocking table is changed from the base end side to the tip side. The length was gradually increased with the transition, and the height from the flocked surface on the proximal end side and the distal end side was set to 10 and 11 mm, respectively. And all the hair | bristle bundles distribute | arranged to the base end side from the area | region produced the head part from which the height from a flocked surface becomes 10 mm.

(Comparative Example 2)
A head portion constructed by implanting a quadrangular pyramid bundle at the tip of the flocking base, providing a vertical hair bundle region on the base end side of the flocking base, and setting the height of all the hair bundles to 10 mm from the flocked surface. Produced.

(Comparative Example 3)
A head part in which a vertical hair bundle having a height of 10 mm from the flocked surface was implanted on a flocking table was produced.

(Evaluation 1: Cleaning property evaluation test)
A brushing simulator designed to brush the teeth of a fixed jaw model (D15-500H, Nissin Co., Kyoto) while keeping the brushing pressure and moving speed of the electric toothbrush constant was used. As an alternative to plaque, occlusal check spray occluded (Pascal, USA) colored powder was applied to the jaw model. The brushing pressure was set to 300 g, and the brushing was performed with a stroke in the longitudinal direction with a stroke width of 20 mm and a vibration frequency of 180 cpm. Then, the target tooth of the jaw model was photographed and image analysis was performed. The cleaning property was evaluated by calculating the removal rate of the colored powder as follows.
Colored powder removal rate (%) = [{(partial area) − (colored powder remaining area)} / (partial area)] × 100

  As shown in Table 1, the colored powder removal rate of Example 1 at each part was higher than the values of Comparative Examples 1 to 3. That is, it was confirmed that the toothbrush of this invention has high cleaning property compared with the conventional product.

1, toothbrush 11, head portion 12, flocking table 13, flocked surface 14, quadrangular pyramidal hair bundle group 15, vertical hair bundle region 21, neck portion 22, handle portion 23, connecting portion 24, ventral side 25, dorsal side 31, Rubber molded resin portion 41, first triangular pyramidal hair bundle group region 42, vertical bristle bundle region 43, second triangular pyramidal hair bundle group region

Claims (7)

  At the tip of the flocking surface of the flocking table, four bundlings composed of two bundlings adjacent in the longitudinal direction and two flocks adjacent in the width direction at the center in the width direction of the flocking table are inclined in the center direction. Providing a planted square pyramidal hair bundle group, adjacent to the base end side in the longitudinal direction of the flocking base of the square pyramidal hair bundle group, and planted perpendicular to the flocked surface, and the height of the quadrangular pyramid hair bundle group The toothbrush characterized by providing the vertical hair | bristle bundle area | region which consists of a some vertical hair | bristle bundle lower than this.   The toothbrush according to claim 1, wherein the flocking table has a flat plate tapered shape.   The toothbrush according to claim 1 or 2, wherein the flocking table has a thickness of 3.6 to 4.6 mm.   In the connection part of a toothbrush neck part and a handle part, the axis | shaft of a handle part warps to the back side, the axis | shaft of the neck part warps to the abdomen side, and the shape from a toothbrush neck part to a handle part is S character shape. The toothbrush according to any one of the above.   The toothbrush according to any one of claims 1 to 4, wherein a rubber resin-molded part is integrally formed on a thumb grip part at least near the neck part of the handle part.   The toothbrush according to any one of claims 1 to 5, wherein each hair bundle constituting the quadrangular pyramid hair bundle group is made of a filament made of polytrimethylene terephthalate. Two hair bundles adjacent in the longitudinal direction of the flock base adjacent to the base end side of the vertical flock base in the vertical hair bundle region, and 1 planted on the side in the width direction of the flock base from these two hair bundles The first triangular pyramidal hair bundle group in which the triangular pyramidal hair bundle group planted by inclining three hair bundles made of two hair bundles in the center direction is positioned at least at the edge portions on both sides in the width direction of the flocking table. A second vertical hair bundle region composed of a plurality of vertical hair bundles arranged perpendicular to the flocked surface, adjacent to the base end side of the flock base of the first triangular pyramidal hair bundle group region. Provided, adjacent to the proximal end side of the second vertical hair bundle region, two hair bundles adjacent to each other in the longitudinal direction of the flocking table, and planted on the side edge in the width direction of the flocking table from these two hair bundles Triangular pyramidal hair bundles planted by inclining three hair bundles made of a single hair bundle in the center direction at least on the edges on both sides in the width direction of the flocking table Second formed by providing a triangular pyramid tufts group region of which is respectively positioned, toothbrush according to any one of claims 1-6.

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