JP2022000290A5 - - Google Patents

Description

TECHNICAL FIELD The present invention relates to toothbrushes, and in particular to toothbrushes configured to improve the ease of brushing back teeth.

As the above toothbrush, for example, a toothbrush equipped with a thin and small head (toothbrush head portion) as disclosed in Patent Document 1 is known.

According to such a toothbrush, since the toothbrush head is small, when the toothbrush tip is inserted into the mouth, the toothbrush head does not easily interfere with the front teeth of the back teeth. It becomes easier to reach the bristles, and the hair bundles are easier to hit the back teeth.

In this way, the toothbrush having the above configuration can improve the ease of brushing the back teeth by increasing the ease of applying the bristle bundles to the back teeth.

JP 2013-34718 A

By the way, in the above-mentioned conventional toothbrush, the rigidity of the toothbrush head is reduced due to its thin thickness. It may bend when

In this case, the force applied by the user to the toothbrush is reduced by the bending of the toothbrush head portion before it is transmitted to the tufts of bristles.

Therefore, in view of such circumstances, it is an object of the present invention to provide a toothbrush capable of firmly brushing the back teeth.

The toothbrush of the present invention is
a bar-shaped handle,
a neck extending from the longitudinal front end of the handle;
a plate-shaped head portion connected to the front end in the longitudinal direction of the neck portion;
a cleaning unit configured by a plurality of bristle bundles standing on the bristle-implanted surface on the inner side in the thickness direction of the head unit so as to be aligned in the front-rear direction ;
a reinforcing portion extending from the front end of the neck portion so as to overlap with the base end side of the back surface on the outer side in the thickness direction of the head portion;
The head portion is formed to have a thickness of 2 to 4 mm and a width smaller than the width of the handle portion,
the neck portion has a thickness and a width smaller than those of the handle portion and is curved ;
The reinforcing portion is a wide portion that spreads outward from the front end of the neck portion in the width direction, and overlaps a region on the front-rear direction side of the rear end of the cleaning portion on the back surface of the head portion. having a formed wide portion;
The wide portion is formed so as to overlap a region on the back surface of the head portion that includes a region that overlaps at least the hair bundle positioned at the rear end in the front-rear direction among the plurality of hair bundles arranged in the front-rear direction.

As described above, the toothbrush of the present invention can exhibit the excellent effect of being able to thoroughly brush the back teeth.

FIG. 1 is a perspective view of a toothbrush according to one embodiment of the present invention. FIG. 2 is a side view of the toothbrush according to the same embodiment. FIG. 3 is a rear view of the toothbrush according to the same embodiment. FIG. 4 is an enlarged view of the head portion of the toothbrush according to the same embodiment as viewed from the rear side. FIG. 5 is an enlarged view of the head portion of the toothbrush according to the same embodiment as viewed from the flocked surface side. FIG. 6 is an enlarged front view of the head portion of the toothbrush according to the same embodiment. FIG. 7 is an enlarged side view of the toothbrush according to the same embodiment. FIG. 8 is an explanatory diagram of teeth.

Hereinafter, a toothbrush according to one embodiment of the present invention will be described with reference to the accompanying drawings. The toothbrush according to the present embodiment is particularly configured to improve the ease of brushing back teeth. This improves the easiness of polishing the back side T2 located at .

As shown in FIG. 1, a toothbrush 1 according to this embodiment includes a handle portion 2 to be gripped by a user, a neck portion 3 extending from the front end in the longitudinal direction of the handle portion 2, and a neck portion 3 extending in the longitudinal direction of the neck portion 3. a plate-shaped head portion 4 connected to the front end; a cleaning portion 5 composed of a plurality of bristles erected on a bristles-implanted surface 40 located inside the head portion 4 in the thickness direction; , and a reinforcing portion 6 extending so as to overlap with the base end side of the back surface 41 of the head portion 4 .

The handle portion 2 is rod-shaped. In this embodiment, as shown in FIG. 2, the axis of the handle portion 2 is called a handle axis A (see FIG. 7).

The neck portion 3 is convexly curved outward in the thickness direction. In the neck portion 3, both the inner surface and the back surface in the thickness direction are curved outward in the thickness direction.

The top portion of the neck portion 3 (the portion located on the outermost side in the thickness direction) is located within the central region side in the longitudinal direction of the neck portion 3. In the present embodiment, the central region is and located on the front end side of the central position of the neck portion 3 . Furthermore, the top of the neck portion 3 is located outside the reinforcing portion 6 in the thickness direction (see FIG. 6).

The front end of the neck portion 3 is located inside the base end of the neck portion 3 in the thickness direction. Therefore, while the base end of the neck portion 3 is positioned on the handle axis A, the tip of the neck portion 3 is positioned inside the handle axis A in the thickness direction.

The width of the neck portion 3 is widest at the proximal end and gradually decreases from the proximal end toward the distal end (see FIG. 3).

As shown in FIG. 4 , the head portion 4 includes a head base portion 42 extending from the neck portion 3 , a head middle portion 43 continuing to the front end of the head base portion 42 , and a head tip portion 44 further continuing to the front end of the head middle portion 43 . and have

Since the head portion 4 of the present embodiment has an oval shape when viewed in the thickness direction, the width of the head base portion 42 gradually widens from the base end (one end connected to the neck portion 3) toward the front end side. ing. The width of the head middle portion 43 is constant from the base end to the front end, and the width of the head tip portion 44 gradually narrows from the base end toward the tip side.

Along with this, the outer peripheral side surface 420 of the head base portion 42 is curved outward in the width direction as it goes from the base end to the front end side, and the outer peripheral side surface 430 of the head middle portion 43 is curved forward and backward from the base end to the front end side. It extends straight along the direction. Further, the outer peripheral side surface 440 of the head tip portion 44 is formed such that the lateral width gradually decreases from the proximal end to the distal end, and is curved so as to protrude forward in the front-rear direction. As shown in FIG. 4, the outer peripheral side surface 420 of the head base portion 42 and the outer peripheral side surface 440 of the head tip portion 44 are curved so as to protrude outward in the width direction.

The thickness of the head portion 4 is constant from the proximal end to the distal end.

As shown in FIG. 5, the cleaning unit 5 is composed of a plurality of bristle bundles 50 each made by bundling a plurality of bristles. In addition, in the cleaning section 5 of the present embodiment, five rows of the bristle bundles 50 are arranged in the width direction, in which the plurality of bristle bundles 50 are arranged in the front-rear direction. That is, the toothbrush 1 of this embodiment is a five-row type toothbrush 1 .

The brushing unit 5 includes a toe portion 51 composed of a plurality of tufts 50 positioned at the tip in the front-rear direction, a heel portion 52 composed of a plurality of tufts 50 positioned at the rear end, and a toe portion 51. and the heel portion 52, a middle portion 53 composed of a plurality of hair bundles 50 arranged in a row along the front-rear direction, and both sides in the width direction, that is, one side and the other side in the width direction with the middle portion 53 as a boundary. and a pair of armpits 54 made up of a plurality of hair tresses 50 positioned at the sides.

The toe portion 51 is configured such that its lateral width is larger than its longitudinal width. That is, the toe portion 51 extends from the outer end of one hair bundle 50 positioned farthest in the lateral width direction to the rear end of the hair bundle 50 furthest forward than the front-rear width from the front end of the hair bundle 50 furthest to the rear to the rear end of the hair bundle 50 furthest back. The width to the outer end of the hair bundle 50 is larger. Further, the toe portion 51 has a rhombic shape when viewed in the thickness direction.

As with the toe portion 51, the heel portion 52 is also configured such that its width is larger than its front-to-rear width, and has a rhomboid shape when viewed in the thickness direction.

The armpit 54 includes a plurality of rows of hair bundles 50, and the row of hair bundles 50 on the outer side in the width direction is shifted rearward in the front-rear direction with respect to the row of hair bundles 50 on the inside in the width direction. placed in position. Therefore, the front end and the rear end of the side portion 54 are inclined toward the rear side in the front-rear direction as they go outward in the width direction. The front end of the heel portion 52 and the rear end of the side portion 54 are formed parallel or substantially parallel to each other.

The plurality of hair bundles 50 include two types of hair bundles 50A and 50B having different types (materials and shapes) of constituting hair, and the hair constituting the toe portion 51, the heel portion 52, and the middle portion 53. The hairs of the bundle 50A and the hairs of the hair bundle 50B forming the armpit 54 are of different types.

The hair bundles 50 forming the toe portion 51, the heel portion 52, and the middle portion 53 are made of, for example, polybutylene terephthalate and have a round tapered shape. It may be made of polybutylene terephthalate.

As shown in FIG. 4, the reinforcing portion 6 has a width (dimension in the width direction) wider than the tip of the neck portion 3 (the width of the tip of the neck portion 3) and a width wider than the tip of the neck portion 3. and a narrow narrow portion.

In the reinforcing portion 6, if the front-rear direction is taken as a reference, a front-rear region 61 positioned forward in the front-rear direction from the maximum width portion 60 having the widest width, and a front-rear region rearward from the maximum width portion 60 and a reinforced rear region 62 located at the .

In the reinforcing front region 61, the width gradually narrows toward the front in the front-rear direction, and the thickness also gradually narrows toward the front in the front-rear direction.

In the reinforcement rear region 62 , the width gradually narrows toward the rear in the front-rear direction, and the width at the base end is the same as the width at the tip of the neck portion 3 .

In addition, if the width direction is taken as a reference, the reinforcement part 6 is continuous with the middle reinforcement part 63 positioned at the center in the width direction and on both sides of the middle reinforcement part 63 in the width direction, and has a steeper slope than the middle reinforcement part 63. and a reinforced edge 64 formed to (see FIG. 6).

The reinforcing middle portion 63 and the back surface 30 of the neck portion 3 form one curved surface by being continuous without a step at the boundary between them.

The reinforcing middle portion 63 is formed so that the portion included in the maximum width portion 60 has the widest width, and the width of the reinforcing middle portion 63 on the front-rear direction front side of the maximum width portion 60 extends toward the front end side. gradually becomes narrower. On the other hand, the width of the reinforcing middle portion 63 on the rear side in the front-rear direction from the maximum width portion 60 gradually widens from the base end toward the front.

Further, the reinforcing edge portion 64 is curved such that a portion included in the maximum width portion 60 (central portion in the front-rear direction) is located outside the front and rear ends in the front-rear direction in the width direction. That is, it is curved so as to protrude outward in the width direction.

The reinforcing portion 6 is formed at a position where the wide portion overlaps the heel portion 52 when the head portion 4 is viewed straight in the thickness direction. Further, in the reinforcing portion 6 of the present embodiment, the maximum width portion 60 is located further forward in the front-rear direction than the rear end of the cleaning portion 5 (the rear end of the hair bundle 50 positioned at the rearmost portion of the heel portion 52). is positioned between the rear end of the cleaning portion 5 and the rear end of the side portion 54 . In addition, the maximum width portion 60 of the present embodiment is formed so as to pass through a position overlapping the hair bundle 50 located on the rearmost side of the heel portion 52 when the head portion 4 is viewed from the thickness direction.

Further, both ends of the maximum width portion 60 in the width direction are located inside the both ends of the head base portion 42 in the width direction. Both ends of the reinforcing rear region 62 (rear end of the reinforcing edge portion 64) in the lateral width direction are also located inside the lateral ends of the head base portion 42, and the width of the head base portion 42 increases toward the front in the front-rear direction. It is formed so that the distance between both ends is widened. In the width direction, the outer ends of the cleaning portion 5 (the outer ends of the side portions 54) are positioned outside both ends of the maximum width portion 60 and inside the outer peripheral end of the head portion 4. is set to

Here, the dimensional relationship and positional relationship between the components of the toothbrush 1 will be described.

As shown in FIG. 7, the head portion 4 is formed such that the flocked surface 40 is inclined at an angle of 8° with respect to the handle axis A, and the flocked surface 40 has a front end located inside the rear end in the thickness direction. inclined to The inclination of the head portion 4 with respect to the handle axis A may be set to 8° to 14° (8° in this embodiment).

The dimension from the back surface 41 of the head section 4 to the tip of the brush section 5 (dimension in the thickness direction) may be, for example, 11.0 mm to 17.0 mm. The thickness of the head portion 4 should be 3.0 mm to 3.5 mm, and the thickness of the cleaning portion 5 (hair length from the flocked surface 40 to the tip of the hair) should be 9.0 mm to 13.0 mm. The thickness of the head portion 4 and the thickness of the cleaning portion 5 are preferably 1:3.

Furthermore, the base end portion of the neck portion 3 is also located on the distal end surface of the cleaning portion 5 .

As shown in FIG. 3, the maximum width of the head portion 4 is smaller than the width of the handle portion 2. For example, the width of the head portion 4 is 10.0 mm to 12.0 mm. The width should be set to 11.0 mm to 15.0 mm.

Also, the maximum width of the head portion 4 is wider than the width of the tip of the neck portion 3 . The width of the neck portion 3 may be, for example, 11.0 mm at the proximal end and 4.5 mm at the distal end.

The configuration of the toothbrush 1 according to this embodiment is as described above. According to the toothbrush 1 of the present embodiment, the head portion 4 is 2 to 4 mm thick, and the width is smaller than the width of the handle portion 2. The toothbrush 1 is small in size and width. Therefore, when the toothbrush 1 is inserted into the mouth, the head portion 4 can easily enter between the teeth and the cheek.

Further, the head portion 4 is continuous with the front end of the curved neck portion 3 and positioned inside the thickness direction of the axis of the handle portion 2, and the tip of the flocking surface 40 is positioned inside the base end of the flocking surface 40 in the thickness direction. Since the head part 4 is inclined by 8 degrees so as to be positioned at , it is easy for the head part 4 to enter deep into the mouth along the teeth.

In this manner, the toothbrush 1 configured as described above facilitates the insertion of the head portion 4 deep into the mouth, thereby making it easier for the bristles of the cleaning portion 5 to wrap around the rear side of the molars. In addition, since the neck portion 3 is curved outward in the thickness direction in accordance with the arrangement of the teeth, when the user rotates the handle portion 2 to brush the teeth (so-called rolling method), the neck against the teeth is By greatly rotating the head portion 4 while suppressing the interference of the portion 3, the teeth can be polished with sufficient force.

In addition, since the length of the bristles of the brushing portion 5 is set to 9.0 mm to 13.0 mm, the bristles are neither too hard nor too soft when the bristles of the brushing portion hit teeth or gums. Appropriate brushing pressure can be obtained.

Furthermore, since the reinforcing portion 6 extending from the front end of the neck portion 3 overlaps widely with the base end portion of the back surface 41 of the head portion 4, the base end portion of the head portion 4 is increased in rigidity due to its increased thickness. It is Therefore, it is possible to prevent the head portion 4 from bending against the neck portion 3 when the bristle bundles 50 are pressed against the teeth. A force can be transmitted to the cleaning station 5 . Therefore, according to the toothbrush 1 configured as described above, the bristles of the cleaning unit 5 can reach the back side of the back teeth, and the entire back teeth can be brushed by the cleaning unit 5 with sufficient force.

As described above, with the toothbrush 1 of the present embodiment, the bristles of the cleaning unit 5 are applied to the back side of the molars to make it easier to remove stains, thereby reducing the amount of unpolished molars. It is possible to achieve an excellent effect of being able to polish firmly.

Moreover, the neck portion 3 is curved such that the front end of the neck portion 3 is located inside the base end of the neck portion 3 in the thickness direction and the top portion is located outside the reinforcing portion 6 in the thickness direction. Therefore, the bending of the neck portion 3 itself to the outside in the thickness direction is suppressed.

In addition, since the reinforcing middle portion 63 and the back surface 30 of the neck portion 3 form a single curved surface by being continuous without a step at the boundary between them, the head portion 4 is more difficult to bend outward in the thickness direction. It's becoming

Furthermore, when the heel portion 52 is used to brush the teeth (so-called heel brushing), the force pushed back from the teeth in the thickness direction concentrates on the base end portion of the head portion 4. The reinforcing portion 6 is formed so that the wide portion overlaps the heel portion 52 when the head portion 4 is viewed straight in the thickness direction. can be prevented from bending outward in the thickness direction.

In addition, in the reinforcing portion 6 of the present embodiment, portions of the maximum width portion 60 , the front reinforcing region 61 , and the rear reinforcing region 62 that overlap the back surface 41 of the head portion 4 are each wider than the outer end of the head portion 4 . Further, the reinforcing front region 61 and the reinforcing rear region 62 have a rounded shape so that the width becomes narrower as the distance from the maximum width portion 60 increases.

Therefore, when the toothbrush 1 inserted in the mouth is moved along the longitudinal direction (for example, when it is inserted into the back of the mouth, pulled out from the back of the mouth, or reciprocated), the reinforcing portion 6 is not in contact with the cheeks and teeth. interference with the toothbrush 1 can be suppressed, and the toothbrush 1 can be moved smoothly.

In addition, in the toothbrush 1 of the present embodiment, since the lengthwise dimension of the neck portion 3 is set to 60.0 mm to 70.0 mm, the bristles of the cleaning portion are applied to the back side of the back teeth and the back side of the oral cavity. It becomes easier to guess.

Furthermore, since the dimension from the back surface 41 of the head unit 4 to the cleaning surface of the cleaning unit 5 is set to 11.0 mm to 17.0 mm, the back side of the back teeth, the row of teeth and the lips, the back side of the cheeks, etc. , the bristles of the brushing part can be easily brought into contact with the teeth and gums in narrow places in the oral cavity.

It should be noted that the toothbrush according to the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

In the above embodiment, the cleaning unit 5 is configured to have five rows of the tufts 50, but the number of rows of the tufts 50 may not be five.

In addition, the toothbrush of the above embodiment is
a rod-shaped handle,
a neck extending from the longitudinal front end of the handle;
a plate-shaped head portion connected to the front end in the longitudinal direction of the neck portion;
a cleaning portion composed of a plurality of bristles erected on a bristled surface on the inner side in the thickness direction of the head portion;
a reinforcing portion extending from the front end of the neck portion so as to overlap with the base end side of the back surface on the outer side in the thickness direction of the head portion;
The head portion has a thickness of 2 to 4 mm, a lateral width smaller than that of the handle portion, and a tip of the flocked surface that is more inward than a base end of the flocked surface in the thickness direction. formed at an angle of 8° to 14° with respect to the axis of the handle so as to be positioned at
the neck portion has a thickness and a width smaller than those of the handle portion and is curved such that the front end is located inside the axis in the thickness direction;
The reinforcing portion is a wide portion that spreads outward from the front end of the neck portion in the width direction, and overlaps a region on the front-rear direction side of the rear end of the cleaning portion on the back surface of the head portion. It may have a formed wide portion.

In the toothbrush with the above configuration, the head portion is 2 to 4 mm in thickness, and the width is smaller than the width of the handle portion. The head part can be easily inserted between the teeth and cheeks when inserted into the mouth.

Further, the head portion is continuous with the front end of the curved neck portion, is located inside the axis of the handle portion in the thickness direction, and is arranged such that the tip is located inside the base end of the flocked surface in the thickness direction. Since it is inclined 8° to 14°, it is easy to insert the head into the back of the mouth along the teeth.

In this manner, the toothbrush with the above configuration makes it easy to allow the head portion to enter deep into the mouth, thereby making it easier for the bristles of the brushing portion to wrap around behind the back teeth.

Furthermore, since the reinforcing portion extending from the front end of the neck portion is widely overlapped on the rear surface of the base end portion of the head portion, the rigidity of the base end portion of the head portion is increased by increasing the thickness. Therefore, it is possible to prevent the head portion from bending against the neck portion when the tuft of bristles is pressed against the teeth. can tell Therefore, according to the toothbrush having the above configuration, the bristles of the cleaning part can reach the rear side of the molars, and the cleaning part can brush the entire molars with a sufficient force.

As described above, the toothbrush configured as described above can reduce unbrushed back teeth by applying the bristles of the brushing part to the back side of the back teeth to make it easier to remove stains.

Further, in the toothbrush of the above embodiment,
The longitudinal dimension of the neck portion may be set to 60.0 mm to 70.0 mm.

According to the toothbrush configured as described above, it is easy to bring the bristles of the cleaning part into contact with the back side of the back teeth and the row of teeth on the back side of the oral cavity.

Further, in the toothbrush of the above embodiment,
A bristle length of the brushing portion may be set to 9.0 mm to 13.0 mm.

According to the toothbrush having the above structure, when the bristles of the brushing part hit the teeth or gums, a moderate brushing pressure is obtained, the bristles being neither too hard nor too soft.

Further, in the toothbrush of the above embodiment,
A dimension from the back surface of the head section to the cleaning surface of the cleaning section may be set to 11.0 mm to 17.0 mm.

According to the toothbrush with the above configuration, the bristles of the brushing part can be easily applied to the teeth and gums in narrow places in the oral cavity, such as the back side of the back teeth, the row of teeth and the lips, and the back side of the cheeks.

Further, in the toothbrush of the present invention of the above embodiment,
A dimension from the back surface of the head section to the cleaning surface of the cleaning section may be set to be equal to or less than the distance from the proximal end position to the distal end position of the neck section in the thickness direction.

According to the toothbrush configured as described above, the head portion and the neck portion are less likely to separate from the teeth, so the head portion can be easily inserted into the back of the mouth.

DESCRIPTION OF SYMBOLS 1... Toothbrush 2... Handle part 3... Neck part 4... Head part 5... Cleaning part 6... Reinforcing part 30... Back surface 40... Flocking surface 41... Back surface 42... Head base 43... Head Middle part 44... Head tip part 50... Hair bundle 50A, 50B... Hair bundle 51... Toe part 52... Heel part 53... Middle part 54... Side part 60... Maximum width part 61... Reinforced front region , 62... Reinforcement rear region 63... Middle reinforcement part 64... Reinforcement edge part 420... Outer peripheral side surface of head base 430... Outer peripheral side surface of central head part 440... Outer peripheral side surface of head tip part A... Handle axis

Claims (1)

a bar-shaped handle,
a neck extending from the longitudinal front end of the handle;
a plate-shaped head portion connected to the front end in the longitudinal direction of the neck portion;
a cleaning unit configured by a plurality of bristle bundles standing on the bristle-implanted surface on the inner side in the thickness direction of the head unit so as to be aligned in the front-rear direction ;
a reinforcing portion extending from the front end of the neck portion so as to overlap with the base end side of the back surface on the outer side in the thickness direction of the head portion;
The head portion is formed to have a thickness of 2 to 4 mm and a width smaller than the width of the handle portion,
the neck portion has a thickness and a width smaller than those of the handle portion and is curved ;
The reinforcing portion is a wide portion that spreads outward from the front end of the neck portion in the width direction, and overlaps a region on the front-rear direction side of the rear end of the cleaning portion on the back surface of the head portion. having a formed wide portion;
The wide portion is formed so as to overlap a region on the back surface of the head portion that includes a region that overlaps at least the hair bundle positioned at the rear end in the front-rear direction among the plurality of hair bundles arranged in the front-rear direction.
toothbrush.