JPWO2018193947A1 - toothbrush - Google Patents

Abstract

Provided is a toothbrush that can more effectively clean the spaces between teeth and between teeth and gums and the surfaces of teeth and gums by brushing with a short time and light force. In the toothbrush, the flocked portion is formed in an elliptical shape in which the bristle surface is viewed from the tip end side of the bristle with the longitudinal direction of the handle as the long axis direction, and the brush portion is located at the center of the ellipse in the short axis direction. A plurality of central bristle bundles arranged along the long axis direction, and a plurality of side bristle bundles arranged on both outer sides in the short axis direction of the plurality of central bristle bundles, at least the central bristle The bundle is formed to be inclined in a mountain shape such that the bundle gradually increases from both sides in the major axis direction of the ellipse toward the center.

Description

  TECHNICAL FIELD The present invention relates to a toothbrush for removing dirt such as plaque attached to teeth by a brush portion planted at the tip of a handle.

  In general, a toothbrush is composed of a handle formed in a longitudinal direction so as to be easily gripped, and a brush portion implanted in a hair implantation portion at a tip of the handle. By moving the handle while gripping the handle, the tip of the brush formed at the tip of the handle hits the tooth, thereby removing dirt such as plaque attached to the tooth.

  Recently, it has become a problem how to efficiently remove not only dirt present on the surface of teeth, but also between teeth (between teeth), the boundary between teeth and gums, and the groove of teeth. ing. Therefore, there is a toothbrush in which the configuration of the brush unit is devised so that the brush unit can be efficiently inserted between the teeth. For example, the toothbrush described in Patent Literature 1 is formed such that when viewed from the side, the brush portion is entirely mountain-shaped. That is, the brush portion is cut such that the height of the brush portion gradually increases toward the center of the brush portion. As a result, compared to the case where the surface of the brush portion is cut in a planar shape, the peak portion of the chevron shape of the brush portion enters between teeth, a gap between teeth and gums (so-called periodontal pocket), a tooth groove, and the like. It will be easier.

  However, like the toothbrush described in Patent Literature 1, even if the tip of the brush portion is formed in a mountain shape as a whole, the plaque on the surface of the teeth and the grooves between the teeth and the grooves in the gap between the teeth and the gums is effective. Sometimes cleaning is not possible.

JP 2012-075725 A

  The present invention has been made in view of the above-mentioned points, and an object of the present invention is to brush the teeth and the gap between the teeth and the gums and the surface of the teeth and the gums more effectively by brushing with a short and light force. It is to provide a toothbrush that can be cleaned.

  Means for Solving the Problems According to one aspect of the present invention, there is provided a long handle (11), a flocking portion (12) having a flocking surface (12a) formed at a tip of the handle (11), and a flocking. And a brush portion (20) including a plurality of hair bundles (22, 23a, 23b) formed of a large number of bristles implanted on the surface (12a), and the brush portion (20) includes teeth. In the toothbrush (1) for cleaning the hair, the flocked portion (12) has a shape in which the flocked surface (12a) is viewed from the tip (22T, 23aT, 23bT) side of the bristle bundle (22, 23a, 23b) in the long axis direction. (P) and a short axis direction (Q). The brush part (20) is formed as a hair bundle (22, 23a, 23b) at the center of the ellipse in the short axis direction (Q). A plurality of central hair bundles (22) arranged along the long axis direction (P); Q), a plurality of side bristle bundles (23a, 23b) arranged on both outer sides of the plurality of central bristle bundles (22), at least the central bristle bundle (22) is in the major axis direction of the ellipse. (P) is characterized in that it is formed to be inclined in a mountain shape so as to gradually increase as it approaches the center from both sides. In this case, the flocked portion (12) may have an elliptical shape in which the longitudinal direction of the handle (11) is the major axis direction (P).

  According to another aspect of the present invention, there is provided a long handle (11), a flocking portion (12) having a flocking surface (12a) formed at the tip of the handle (11), and a flocking surface (12a). And a brush unit (20) including a plurality of hair bundles (21, 22, 23a, 23b) each formed of a large number of hairs implanted in the brush, and cleaning the teeth with the brush unit (20). In the toothbrush (1-2), the flocked portion (12) has a flocked surface (12a) viewed from the tip (21T, 22T, 23aT, 23bT) side of the bristle bundle (21, 22, 23a, 23b). Are formed in an elliptical shape having a major axis direction (P) and a minor axis direction (Q), and the brush part (20) is a hair bundle (21, 22, 23a, 23b), (P) and a plurality of hair bundles (21, 22, 23a) located at the center in the short-axis direction (Q). 23b), the highest bristle bundle (21), a plurality of central bristle bundles (22) arranged on both sides of the top bristle bundle (21) along the long axis direction (P), and the short bristle direction ( Q), a plurality of side bristle bundles (23a, 23b) arranged on both sides of the central bristle bundle (22), and at least the plurality of central bristle bundles (22) are in the long axis direction (P). Of the top hair bundle (21), the tip (21T) of the top hair bundle (21) has a plurality of central hair bundles (22). ) Is located at a position higher than the intersection (X) of the ridgeline (R) formed by connecting the tip portions (22T). Also in this case, the flocked portion (12) may have an elliptical shape in which the longitudinal direction of the handle (11) is the major axis direction (P).

  In the toothbrush having the above-described configuration according to the present invention, the flocked portion is formed in an elliptical shape having a long-axis direction and a short-axis direction when the flocked surface is viewed from the tip side of the hair bundle. The bristles (bristles) of the brush portion are arranged in a curved line along the outer circumference. As a result, compared to the case where the flocked portion is formed in a rectangular shape, for example, when brushing the teeth with the brush portion, the corners of the flocked portion (the tip of the handle) and the bristle bundle on the outer peripheral side of the brush portion, etc. Can be prevented from unnecessarily interfering with various parts in the oral cavity (such as teeth, gums, and the inner surface of the cheek). Therefore, smooth and efficient brushing can be performed only by moving the brush portion with a light force. In addition, the bristles (hair bundles) of the brush portion are arranged in a curved line along the outer periphery of the ellipse, so that the brush can be brushed by the stroke of the toothbrush with respect to the upper surface, the side surface, or the gap between the teeth having a complicated uneven shape. Since the tips of the hairs (hair bundles) of the portions can be effectively brought into contact (sliding), dirt in tooth grooves and gaps can be more efficiently removed. Further, it is possible to secure a longer distance (length dimension) of the brush portion along the longitudinal direction of the handle, that is, the stroke direction of the toothbrush, as compared with the case where the flocking portion is formed in a circular shape (true circular shape). Therefore, the contact area (contact area) of the brush portion with the teeth can be increased accordingly. Therefore, the removal of the stain on the teeth can be performed more efficiently. The toothbrush according to the present invention has the above-described elliptical shape of the flocked portion, so that the plurality of effects can be obtained in combination, and a toothbrush that can efficiently remove dirt from tooth grooves and gaps is realized. it can.

  Further, in the toothbrush according to the present invention, at least a part of the bristle bundle of the brush portion is formed in a mountain shape so as to gradually increase as approaching the center in the major axis direction of the ellipse, so that the brush portion has The tip of the central hair bundle at the highest position can penetrate deep into the gap or groove between the teeth and gums without being interfered by the surrounding hair bundle, and the central hair that has entered the deep position Since the plurality of side hair bundles arranged around the bundle support the bundle, it is possible to reliably remove dirt at a deep position.

  In addition, the flocked portion has an elliptical shape, and the side hair bundles are disposed on both sides (both sides in the short axis direction) of the central hair bundle, so that the surface of the teeth and gums around the portion where the central hair bundle enters. The plurality of side hair bundles abut uniformly. In addition, if the side bristle bundle is also formed in a mountain shape so as to become higher as it approaches the center, when the lower side bristle bundle on the outer peripheral side comes into contact with the teeth, the higher side portion on the center side The bristle bundle can abut the deeper teeth so that there is no interference between the bristle bundles. Thereby, the surfaces of the teeth and gums around the gaps and grooves can be effectively cleaned by the side hair bundles.

  Further, in the toothbrush (1, 1-2) having the above configuration according to the present invention, the side hair bundle (23) is disposed on the side closer to the center hair bundle (22) in the short axis direction (Q). It may include a first side bristle bundle (23a) and a second side bristle bundle (23b) located farther from the central bristle bundle (22). Further, in this case, it is desirable that the height of the first side hair bundle (23a) is higher than the height of the adjacent second side hair bundle (23b). By adopting such a configuration, the shape of the brush portion is formed such that the height of the bristles (bristles) gradually decreases from the center of the flocked portion to both sides in the short axis direction of the ellipse. Therefore, the tip of the first side hair bundle (23a) located at a higher position in the side hair bundle does not interfere with the surrounding hair bundle, and the gap (MG) between the tooth (T) and the gum (M). It is possible to penetrate to a deep position such as a groove or a groove (TU), so that dirt at a deep position can be scraped off.

  Further, in the toothbrush according to the present invention, when the above-described top hair bundle (21) is provided, the top hair bundle (21) is more easily placed than the surrounding center hair bundle (22) and side hair bundle (23). It is good to configure high. Accordingly, the central hair bundle (22) and the side hair bundle (23) inclined in a mountain shape (pyramid shape) clean the surface of the tooth (T) adjacent to the space between the teeth or the gap between the tooth and the gum. In the state, the tip (21T) of the top hair bundle (21) has a groove (TU) on the surface of the tooth (T), a space between teeth (TG), and a gap (MG) between the tooth (T) and the gum (M). ). This makes it possible to more effectively clean tooth grooves, interdental spaces, and gaps between teeth and gums by brushing with a short and light force.

Further, in the toothbrush according to the present invention, the central hair bundle (22) and the side hair bundle (23) excluding the top hair bundle (21) are formed in a shape inclined in a mountain shape (pyramid shape). By means of these central hair bundles (22) and side hair bundles (23), compared to a normal (conventional) tip-shaped toothbrush, the surface of teeth and gaps and grooves between teeth can be effectively removed. It can be washed. Also, a position higher than the intersection (X) of the ridgeline (R) formed by connecting the tips (21T) of the top hair bundle (21) to the tips (22T) of the plurality of central hair bundles (22). Then, the tip (21T) of the top hair bundle (21) can scrape off dirt at deep positions such as tooth grooves, interdental space, and gaps between teeth and gums. Therefore, with these effects, the toothbrush can effectively remove the dirt of the whole oral cavity including the space between the teeth and the gap between the teeth and the gums by brushing with a short time and light force.
In addition, the code | symbol in a parenthesis mentioned above shows the code | symbol of the corresponding component of embodiment mentioned later as an example of this invention.

  According to the toothbrush according to the present invention, the flocked portion is formed in an elliptical shape having a major axis direction and a minor axis direction when the flocking surface is viewed from the tip side of the bristle bundle. Therefore, a toothbrush that can more effectively clean the spaces between teeth, gaps and grooves between the teeth and the gums, and the surfaces of the teeth and the gums by brushing with a short time and light force can be obtained.

1 is an overall view of a toothbrush according to a first embodiment of the present invention. It is an enlarged view of the brush part of the toothbrush of 1st embodiment, FIG. 2A is a top view, FIG. 2B is a side view, and FIG. 2C is a front view. It is a figure which shows the state which is cleaning the clearance of a tooth, and is the figure which looked at the tooth from the upper part. It is a figure which shows the state which is cleaning the clearance gap between a tooth and a gum, and is the figure which looked at the tooth and the gum from the side. It is an enlarged view of the brush part of the toothbrush concerning 2nd embodiment, FIG. 5A is a top view, FIG. 5B is a side view, and FIG. 5C is a front view.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is an overall view of a toothbrush 1 according to a first embodiment of the present invention. The toothbrush 1 shown in FIG. 1 includes a toothbrush body 10 including a long handle 11 (11A, 11B) and a flocked portion 12 having a flocked surface 12a formed at the tip of the handle 11, and a flocked surface on the flocked surface 12a. And a brush unit 20 including a hair bundle (central hair bundle 22 and side hair bundles 23a and 23b) described later, which is configured by a large number of hairs.

  The handle 11 has a grip portion 11A to be gripped by the user, and a neck portion 11B having a smaller width than the grip portion 11A and having elasticity. With this configuration, the user cleans the teeth T (see FIGS. 3 and 4) by gripping the grip 11 </ b> A and moving the brush 20 at the tip of the handle 11. Note that the handle 11 of the toothbrush 1 is made of a relatively hard synthetic resin material such as polypropylene, and has a hair bundle (a central hair bundle 22, a first side hair bundle 23a, a second side hair bundle 23a, The hair constituting the hair bundle 23b) is made of a relatively soft synthetic resin material such as nylon.

  The flocked portion 12 of the toothbrush 1 has a pattern in which the flocked surface 12a (upper surface) is viewed from the tip (upper end) 22T, 23aT, 23bT side of the bristle bundles 22, 23a, 23b (on the front side of the sheet of FIG. 1). 11 is formed in an elliptical shape whose longitudinal direction is the major axis direction P. In addition, the length of the ellipse in the major axis direction is set to be about 2 cm, for example, in order to easily enter the oral cavity and make a small turn. Is preferred.

  The brush section 20 of the toothbrush 1 will be specifically described. FIG. 2 is an enlarged view of the brush unit 20, FIG. 2A is a plan view, FIG. 2B is a side view, and FIG. 2C is a front view. As shown in FIG. 2, the bristle bundle forming the brush unit 20 may be divided into a central bristle bundle 22 and side bristle bundles 23 a and 23 b (first side portions) depending on the location of the bristle plant 12 (the flocking surface 12 a). The hair bundle 23a and the second side hair bundle 23b) are classified. That is, the brush portion 20 includes a plurality of central hair bundles 22 arranged (arranged) along the major axis direction P in the central region AC in the minor axis direction Q of the flocking portion 12, and the minor axis of the central hair bundle 22. And a plurality of side hair bundles 23a and 23b arranged in regions AS1 and AS2 adjacent to both sides in the direction Q. Next, the configuration of the central hair bundle 22 and the side hair bundles 23a and 23b will be specifically described.

  As shown in FIG. 2A, the central hair bundle 22 is composed of a plurality of hair bundles, and is arranged (in a straight line) along the long axis direction P in the area AC. In the present embodiment, an example is shown in which eight central hair bundles 22 are arranged. The plurality of central hair bundles 22 are formed to be inclined in a mountain shape (pyramid shape) so as to gradually increase as approaching the center in the long axis direction P. Specifically, as shown in FIG. 2B, the four bundles on the handle 11 side of the central hair bundle 22 rise linearly as they approach the distal end, and the four bundles on the distal end side move toward the distal end. It is formed to be inclined so as to linearly decrease as it approaches. Further, as shown in FIGS. 2B and 2C, the height of the central hair bundle 22 is configured to be higher than the adjacent side hair bundles 23a and 23b.

  As shown in FIG. 2A, the plurality of side hair bundles 23 a and 23 b are arranged adjacent to the center hair bundle 22 in both outer regions AS1 and AS2 of the center hair bundle 22. Further, the plurality of side hair bundles 23a and 23b are, in the short-axis direction Q, a first side hair bundle 23a arranged in an area AS1 closer to the center hair bundle 22 (inside the flocked surface 12a), And a second side hair bundle 23b disposed in a region AS2 farther from the center hair bundle 22 (outside the flocked surface 12a).

  In the present embodiment, the first side hair bundles 23a are arranged in seven bundles on each side of the central hair bundle 22, and the second side hair bundles 23b are arranged on the outside of the first side hair bundles 23a. An example in which bundles are arranged is shown. Specifically, as shown in FIG. 2B, the first side hair bundle 23a has the highest bundle at the center in the long axis direction P, and the three bundles on the handle 11 side are the tip of the handle 11. The three bundles on the tip end side of the handle 11 are formed to be inclined so as to linearly decrease as approaching the tip end of the handle 11. In addition, the second side hair bundle 23b linearly rises as the two bundles on the handle 11 approach the distal end, and the two bundles on the distal end of the handle 11 approach the distal end of the handle 11. And is formed to be inclined so as to linearly decrease with the distance.

  As shown in FIG. 2B, the inclination angle θ1 of the line connecting the tip 22T of the central hair bundle 22 inclined in a mountain shape and the inclination angle θ2 of the line connecting the tip 23aT of the first side hair bundle 23a. And the inclination angle θ3 of the line connecting the tip 23bT of the second side hair bundle 23b is the same. The central hair bundle 22 is configured to be harder than the side hair bundles 23a and 23b. In this connection, the hair volume of the central hair bundle 22 may be larger than the hair volume of the side hair bundles 23a and 23b. Thereby, the rigidity of the brush part 20 can be kept high. In the present embodiment, the central hair bundles 22 are arranged in one row along the long axis direction P, but are not necessarily limited to one row, and may be a plurality of rows. Further, the number of bundles of the side hair bundles 23a and 23b (first side hair bundle 23a and second side hair bundle 23b) is not limited to the number shown in the present embodiment.

  FIG. 3 and FIG. 4 are diagrams showing a use state of the toothbrush 1 and showing a state in which a gap TG between the teeth T (interdental) and a gap MG between the teeth T and the gum M are being cleaned. FIG. 3 is a diagram of the plurality of teeth T viewed from above, and FIG. 4 is a diagram of the teeth T and gums M viewed from the side. As shown in FIGS. 3 and 4, the toothbrush 1 of the present embodiment moves the brush unit 20 in small increments by applying the brush unit 20 to the surface TS of the tooth T or the space between the tooth T and the gum M, so that the tooth T and the tooth T Clean the gap MG of the gum M.

  At this time, by arranging the central hair bundle 22 and the side hair bundles 23a and 23b on the elliptical flocked surface 12a, the upper surface and the side surface of the tooth T having a complicated uneven shape or the gap TG between the teeth T are formed. On the other hand, the tip end portions 22T, 23aT, 23bT of the bristles (bristles 22, 23a, 23b) of the brush portion 20 can be effectively brought into contact (sliding) by the stroke of the toothbrush 1, so that the grooves TU of the teeth T, Dirt in the gap TG can be more efficiently removed. In addition, since the central hair bundle 22 and the side hair bundles 23a and 23b are formed in the shape of a mountain (pyramid), the tip of the mountain is not only the surface TS of the tooth T but also the groove of the tooth T. It is easy to enter the TU, the gap TG between the teeth T, the gap MG between the teeth T and the gums M, and it is possible to scrape dirt at deep positions such as the groove TU of the teeth T, the gap TG between the teeth T, and the gap MG between the teeth T and the gums M. It becomes possible. In addition, by forming the flocked surface 12a in an elliptical shape and forming the central hair bundle 22 and the side hair bundles 23a and 23b in a mountain shape, the central hair bundle 22 located at the tip of the mountain shape can be used. Not only the side hair bundles 23a and 23b, but also the center hair bundle 22 and the side hair bundles 23a and 23b adjacent to the tip sequentially have a groove TU of the tooth T, a space TG between the teeth, and a gap between the tooth T and the gum M. It becomes easy to enter MG and the like. Therefore, by these synergistic effects, it is possible to effectively remove the dirt of the entire oral cavity including the interdental TG and the gap MG between the tooth T and the gum M by brushing with a short time and light force.

  In addition, since the flocked surface 12a of the toothbrush 1 is made elliptical and the central hair bundle 22 is configured higher than the side hair bundles 23a and 23b on both sides, the center inclined in a mountain shape (pyramid shape). The distal end portion 21T of the partial hair bundle 22 and the distal end portions 22aT and 22bT of the side hair bundles 23a and 23b penetrate deep into the groove TU of the tooth T, the inter-tooth TG, and the gap MG between the tooth T and the gum M. Thus, it is possible to scrape off dirt that has entered the groove TU of the tooth T, the inter-tooth TG, and the gap MG between the tooth T and the gum M by brushing with a short and light force.

  Further, as described above, since the inclination angle θ1 of the central hair bundle 22 inclined in a mountain shape and the inclination angles θ2, θ3 of the side hair bundles 23a, 23b are configured to be the same, the central hair bundle 22 is When the tip portion 21T enters the gap MG between the tooth T and the gum M or the deep portion of the groove TU, the side hair bundles 23a and 23b adjacent to the central hair bundle 22 in the short-axis direction Q become the central hair bundle 22. At an angle similar to the above, it penetrates into and contacts the teeth T and gums M of the part adjacent to the deep part. In this way, the central hair bundle 22 and the side hair bundles 23a and 23b effectively clean the gap MG and the groove TU between the tooth T and the gum M, and the portion of the tooth T and the gum M adjacent thereto, and A toothbrush that can effectively remove dirt from the entire oral cavity, including between teeth and gaps between teeth and gums, by brushing with short and light force.

  Further, as shown in FIG. 3, in the toothbrush 1 of the present embodiment, the length dimension L1 of the flocked portion 12 in the major axis direction P is set to be substantially the same as the width dimension L2 of two teeth T. I have. This makes it possible to easily brush two teeth T in order, so that the teeth TG and the gap MG between the teeth T and the gums M can be cleaned one by one without leakage, and in a shorter time. Can be effectively cleaned.

  As described above, in the toothbrush 1 of the present embodiment, the long handle 11, the flocking portion 12 having the flocking surface 12 a formed at the tip of the handle 11, and a large number of flocks planted on the flocking surface 12 a And a brush unit 20 including a plurality of hair bundles 22, 23a, and 23b made of hair. In the toothbrush 1 for cleaning the teeth with the brush 20, the flocked portion 12 has a flocked surface 12a in the longitudinal direction of the handle 11 as viewed from the tips 22T, 23aT, 23bT of the hair bundles 22, 23a, 23b. Is formed in an elliptical shape having a major axis direction P. The brush portion 20 includes a plurality of central hair bundles 22 arranged along the major axis direction P in the central region AC in the minor axis direction Q of the ellipse, and a plurality of central portions as the hair bundles 22, 23a, and 23b. And a plurality of side hair bundles 23a and 23b arranged in regions AS1 and AS2 on both outer sides of the hair bundle 22. The central hair bundle 22 and the side hair bundles 23a and 23b are formed to be inclined in a mountain shape so as to gradually increase from both sides in the major axis direction P of the ellipse toward the center.

  In the toothbrush 1 of the present embodiment, the flocked portion 12 has a shape in which the flocked surface 12a is viewed from the tip portions 22T, 23aT, 23bT of the bristle bundles 22, 23a, 23b. By being formed in an elliptical shape, the bristles (hair bundles) of the brush portion 20 are arranged in a curved line along the outer periphery 12b of the ellipse. As a result, as compared with the case where the flocked portion 12 is formed in a rectangular shape, for example, when brushing the teeth with the brush portion 20, the corners of the flocked portion 12 (the tip of the handle 11) and the outer periphery of the brush portion 20 It is possible to prevent the hair bundles on the side from unnecessarily interfering with each part in the oral cavity (teeth, gums, the inner surface of the cheeks, etc.). Brushing will be possible.

  Further, the bristles (hair bundles) of the brush portion 20 are arranged in a curved line along the outer circumference of the ellipse, so that the stroke of the toothbrush 1 with respect to the upper surface and the side surface of the tooth having a complicated uneven shape or the gap between the teeth. As a result, the tips of the bristles (bristle bundles) of the brush portion 20 can be effectively brought into contact (sliding), so that dirt in tooth grooves and gaps can be efficiently removed.

  Furthermore, the distance (length dimension) of the brush portion 20 along the longitudinal direction of the handle 11, that is, the stroke direction of the toothbrush 1 is compared with the case where the outer periphery 12b of the flocking portion 12 is formed in a circular shape (a perfect circular shape). Since it is possible to secure a long length, the contact area (contact area) of the brush portion 20 with the teeth can be increased accordingly. Therefore, the removal of the stain on the teeth can be performed more efficiently. As described above, the toothbrush 1 of the present embodiment can realize a toothbrush that can exhibit the above-described plurality of effects by forming the outer periphery 12b of the flocked portion 12 in the above-described elliptical shape.

  In addition, since the distal ends (upper ends) of the center hair bundle 22 and the side hair bundles 23a and 23b are formed in a mountain shape (pyramid shape), the plurality of center hair bundles 22 and the plurality of side hair bundles 23a are formed. , 23b can penetrate deep into the gap MG or groove TU between the teeth T and the gums M without being interfered by the surrounding hair bundles. It is also possible to scrape off dirt at deep positions. Further, since the plurality of central hair bundles 22 are formed so as to have a mountain shape, the center hair bundle 22 at the second highest position adjacent to the central hair bundle 22 at the highest position is also the most. It becomes easy to enter the gap MG or the groove TU following the central hair bundle 22 at a high position. The same applies to the plurality of side hair bundles 23a and 23b which are also formed in a mountain shape.

  In addition, the central bristle bundle 22 of the toothbrush 1 is configured to be higher than the surrounding side bristle bundles 23a and 23b, so that the central bristle bundle 22 has the gap MG and the groove TU between the teeth T and the gums M. When penetrating into the deepest part, following the central hair bundle 22, the side hair bundles 23a and 23b having a height lower than that of the central hair bundle 22 are easily applied to the teeth T and gums M adjacent to the deepest part. Get in.

  Furthermore, since the inclination angle θ1 of the central hair bundle 22 inclined in a mountain shape and the inclination angles θ2 and θ3 of the side hair bundles 23a and 23b are the same, the central hair bundle 22 becomes the tooth T and the gum M. Of the central hair bundle 22 in the minor axis direction Q, the side hair bundles 23a and 23b adjacent to the central hair bundle 22 at the same angle as the central hair bundle 22 when entering the deep part of the gap MG or the groove TU. It penetrates into and contacts the teeth T and gums M of the adjacent part. In this way, the central hair bundle 22 and the side hair bundles 23a and 23b effectively clean the gap MG and the groove TU between the tooth T and the gum M, and the portion of the tooth T and the gum M adjacent thereto, and A toothbrush that can effectively remove dirt from the entire oral cavity, including between teeth and gaps between teeth and gums, by brushing with short and light force.

  Further, in the toothbrush 1 having the above configuration, the hardness of the central bristle bundle 22 may be configured to be harder than the side bristle bundles 23a and 23b. As described above, the hardness of the brush bundles 21 and 22, which gradually increases as approaching the center of the flocking portion 12, is gradually increased as approaching the center of the flocking portion 12. Can be kept high. For this reason, the cleaning performance of the central hair bundle 22 at the time of entering the space between the teeth TG, the gap MG between the teeth T and the gums M, and the deep portion of the groove TU can be maintained at a high level.

  Further, in the toothbrush 1 having the above-described configuration, the bristle amount of the central bristle bundle 22 may be larger than the bristle amount of the side bristle bundles 23a and 23b. By increasing the amount of hair of the central hair bundle 22, the rigidity of the central hair bundle 22 longer than the side hair bundles 23a and 23b can be improved. For this reason, the cleaning performance of the central hair bundle 22 at the time of entering the space between the teeth TG, the gap MG between the teeth T and the gums M, and the deep portion of the groove TU can be maintained at a high level.

(Second embodiment)
Next, a second embodiment of the present invention will be described. In the description of the second embodiment and the corresponding drawings, the same or corresponding components as those of the first embodiment are denoted by the same reference numerals, and a detailed description of the portions will be omitted below. 5: is an enlarged view of the brush part 20 of the toothbrush 1-2 of 2nd embodiment, FIG. 5A is a top view, FIG. 5B is a front view, FIG. 5C is a side view.

  The shape of the flocking portion 12 (the flocking surface 12a) of the toothbrush 1-2 of the present embodiment is the same elliptical shape as the flocking portion 12 of the toothbrush 1 of the first embodiment. Then, as shown in FIG. 5, the bristle bundles forming the brush portion 20 of the toothbrush 1-2 may have a top bristle bundle 21, a central bristle bundle 22, It is classified into side hair bundles 23a and 23b (first side hair bundle 23a and second side hair bundle 23b). That is, the brush portion 20 includes a top hair bundle 21 located at the center of the flocking portion 12, a plurality of central hair bundles 22 arranged alongside the top hair bundle 21 in the long axis direction P, and a A plurality of side hair bundles 23a and 23b are arranged adjacent to the central hair bundle 22. Hereinafter, each of these hair bundles 21, 22, and 23 will be specifically described.

  First, the configuration of the top hair bundle 21 will be described. The top hair bundle 21 is located at the center of the flocking portion 12 (the flocking surface 12a). Here, the center of the flocked portion 12 refers to the center and the short side in the major axis direction P which is the center of the elliptical shape of the flocked portion 12 when the flocked portion 12 (flocked surface 12a) is viewed in a plan view illustrated in FIG. 5A. It is the center in the axial direction Q. The top hair bundle 21 is formed such that the tip 21T of the hair bundles 21, 22, and 23 has the highest height. Specifically, the height is such that the tip 21T of the top hair bundle 21 is higher than the intersection X of the ridge line R formed by connecting the tip 22T of the center hair bundle 22 (see FIG. 5B). For this reason, the tip portion 21T of the top hair bundle 21 projects from the center hair bundle 22 and the side hair bundles 23a and 23b.

  Further, as shown in FIGS. 5B and 5C, the tip end portion 21T of the top hair bundle 21 is formed to be sharp in a conical shape. The hardness of the top hair bundle 21 is preferably higher than that of the center hair bundle 22 and the side hair bundles 23a and 23b because the rigidity increases. Specifically, the material of the top bristle bundle 21 is made harder than the center bristle bundle 22 and the side bristle bundles 23a and 23b, or the thickness of the brush bristle constituting the top bristle bundle 21 is reduced by the center bristle bundle 22 and It is preferable to make the side hair bundles 23a, 23b thicker than the thickness. If the amount of hair (the thickness of the hair bundle) of the top hair bundle 21 is larger than the hair amount of the central hair bundle 22 or the side hair bundles 23a and 23b (the thickness of the hair bundle is increased), the hair bundle is increased. Is preferred because the rigidity of the film is increased.

  Next, the center hair bundle 22 and the side hair bundles 23a and 23b will be described. As shown in FIG. 5A, the central hair bundle 22 is composed of a plurality of hair bundles, and is located in the central area AC of the flocking portion 12 in the short axis direction Q. The side hair bundles 23a and 23b are composed of a plurality of hair bundles and are located in the side regions AS1 and AS2 adjacent to both sides of the central region AC of the flocking portion 12 in the short axis direction Q. Further, in the short-axis direction Q, the side hair bundles 23a and 23b include a first side hair bundle 23a arranged in the area AS1 on the side (inside) near the center hair bundle 22 and a center hair bundle 22. And the second side hair bundle 23b arranged in the area AS2 on the side (outside) far from the outside.

  The central hair bundles 22 are arranged side by side on both sides in the long axis direction P so as to sandwich the top hair bundles 21. Further, the first side hair bundles 23a are arranged side by side in the long axis direction P in the first side region AS1 outside the central region AC, and the second side hair bundles 23b are arranged in the first side region. In the second side region AS2 outside of AS1, they are arranged side by side in the long axis direction P. In the present embodiment, the central hair bundle 22, the first side hair bundle 23a, and the second side hair bundle 23b are all arranged in one row along the long axis direction P, but these are not necessarily required. The number of rows is not limited to one, but may be two or more.

  As shown in FIG. 5B, the central hair bundle 22, the first side hair bundle 23 a, and the second side hair bundle 23 b are each viewed from the side of the brush unit 20 at the center (the long axis direction) It is formed in a mountain shape (pyramid shape) so as to gradually increase as it approaches (the center of P). Furthermore, as shown in FIG. 5C, the height of the central hair bundle 22 is formed higher than the first side hair bundle 23 a adjacent to the flocked portion 12 in the short axis direction Q, and The height of the bundle 23a is formed higher than the second side hair bundle 23b which is also adjacent in the short axis direction Q.

  In the toothbrush 1-2 of the present embodiment, the top bristle bundle 21 is configured to be higher than the surrounding central bristle bundle 22 and the side bristle bundles 23a and 23b, so that the tip portion has a mountain shape (pyramid shape). The tip of the top hair bundle 21 in a state where the inclined central hair bundle 22 and the side hair bundles 23a and 23b are cleaning the inter-tooth TG or the surface TS of the tooth T adjacent to the gap MG between the tooth T and the gum M. The portion 21T enters deep into the groove TU of the tooth T, the interdental TG, and the gap MG between the tooth T and the gum M. Thus, it is possible to scrape off dirt that has entered the groove TU of the tooth T, the inter-tooth TG, and the gap MG between the tooth T and the gum M by brushing with a short and light force.

  As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above embodiments, and various modifications may be made within the scope of the claims and the technical idea described in the specification and the drawings. Deformation is possible. For example, in the toothbrush 1 (1-2) of the above-described embodiment, the flocked portion 12 has an elliptical shape in which the longitudinal direction of the handle 11 is the long axis direction P. However, the elliptical shape of the flocked portion of the toothbrush of the present invention is as follows. The major axis direction is not limited to the one that matches the longitudinal direction of the handle, and the major axis direction and the longitudinal direction of the handle may be different directions.

Claims (7)

With a long handle,
A flocking portion having a flocking surface formed at the tip of the handle,
A brush portion comprising a plurality of bristle bundles composed of a large number of bristles planted on the flocking surface, a toothbrush for cleaning teeth by the brush portion,
The flocked portion is formed in an elliptical shape having a long-axis direction and a short-axis direction, the shape of the flocked surface viewed from the tip end side of the hair bundle,
The brush portion, as the hair bundle,
A plurality of central hair bundles arranged along the long axis direction at the center of the ellipse in the short axis direction,
A plurality of side hair bundles arranged on both outer sides of the plurality of central hair bundles in the short axis direction,
A toothbrush wherein at least the central bristle bundle is formed to be inclined in a mountain shape so as to gradually increase from both sides of the ellipse in the long axis direction toward the center. With a long handle,
A flocking portion having a flocking surface formed at the tip of the handle,
A brush portion including a plurality of bristles configured with a large number of bristles planted on the flocked surface, and a toothbrush that cleans teeth with the brush portion,
The flocked portion is formed in an elliptical shape having a long-axis direction and a short-axis direction, the shape of the flocked surface viewed from the tip end side of the hair bundle,
The brush portion, as the hair bundle,
The highest top hair bundle of the plurality of hair bundles located at the center of the major axis direction and the minor axis direction of the ellipse,
A plurality of central hair bundles arranged on both sides of the top hair bundle along the long axis direction;
A plurality of side hair bundles disposed on both sides of the central hair bundle in the short axis direction,
At least the plurality of central hair bundles are formed to be inclined in a mountain shape so as to gradually increase from both ends in the long axis direction as approaching the top hair bundle,
A toothbrush wherein the tip of the top hair bundle is at a position higher than the intersection of ridges formed by connecting the tips of the plurality of central hair bundles. The toothbrush according to claim 2, wherein the number of hairs constituting the top hair bundle is larger than the number of hairs constituting one of the central hair bundle and the side hair bundle. The toothbrush according to any one of claims 1 to 3, wherein the flocked portion has an elliptical shape with a longitudinal direction of the handle as the long axis direction. The side hair bundles are, in the short axis direction, a first side hair bundle arranged on a side closer to the center hair bundle, and a second side hair arranged on a side far from the center hair bundle. The toothbrush according to any one of claims 1 to 4, comprising a bundle.   The toothbrush according to claim 5, wherein the height of the first side hair bundle is higher than the height of the adjacent second side hair bundle.   The toothbrush according to any one of claims 1 to 6, wherein the height of the central hair bundle is higher than the height of the adjacent side hair bundle.

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