JP6478384B2 - Toothbrush handle body and toothbrush - Google Patents

Description

  The present invention relates to a toothbrush handle body and a toothbrush.

Generally, a toothbrush includes a rod-shaped handle portion, a neck portion extending from the tip of the handle portion, and a head portion provided at the tip of the neck portion and having a flocked surface formed thereon.
In recent years, various functional toothbrushes with improved cleanability and usability have been developed.
For example, Patent Document 1 includes a rod-shaped handle portion, a head portion that is provided at the tip of the handle portion via a neck portion and has a brush, and elastically connects a connection portion between the handle portion and the neck portion. In the brushing pressure control toothbrush that can be deformed, a connecting portion that connects the handle portion and the neck portion in the toothbrush width direction is formed, and the neck portion can be bent with respect to the handle portion by torsional deformation of the connecting portion. A toothbrush capable of controlling the brushing pressure is disclosed.

By the way, it is known that the back teeth are the site most likely to develop periodontal disease.
The main cause is that the head thickness and neck diameter employed in conventional toothbrushes do not reach the back of the back teeth (the back of the back teeth), so that the back of the back teeth is insufficiently cleaned.

So far, toothbrushes having an ultrathin head portion and an ultrafine neck portion have been developed for the purpose of toothbrushes that can be cleaned to the back of the back teeth.
However, even a toothbrush having such an ultra-thin head portion and an ultra-fine neck portion requires an operation of greatly tilting the handle portion in order to polish the back teeth deeply. In that operation, it is necessary to open the mouth wide. In addition, excessive stress is applied to the lips due to contact of the neck portion and the handle portion.

  For such a problem, Patent Document 2 includes a curved holding portion made of an elastic member integrated at both ends and separated from each other at an intermediate portion, and a pressing portion shorter than the holding portion, and the integrated both ends. A handle for a tooth cleaning member is disclosed that supports the tooth cleaning member by one end of the tooth cleaning member. When the pressing portion is pressed toward the holding portion, the handle for the tooth cleaning member is deformed so as to increase the curvature of the holding portion, and the back of the back teeth is easily brushed.

Japanese Patent Laid-Open No. 10-215950 Japanese Patent Laid-Open No. 2001-21936

However, in the invention described in Patent Document 2, the shape of the toothbrush in a state where the pressing portion is not pressed must be greatly curved in order to easily polish the back of the back teeth. If it does so, when brushing teeth other than the back of a back tooth, for example, an anterior tooth, it will become difficult to polish.
On the other hand, in the invention described in the same document, when the shape of the toothbrush in the state where the pressing portion is not pressed is not greatly curved, the toothbrush is not bent enough even if the pressing portion is pressed, and the back of the back tooth is polished. Needs to open its mouth wide and excessive stress is applied to the lips where the toothbrush contacts.
Therefore, an object of the present invention is to provide a toothbrush handle body and a toothbrush that are easy to clean the back of the back teeth and that can clean all the teeth well and that are excellent in tooth cleaning.

As a result of extensive studies, the present inventor can easily clean the back of the back teeth by providing a fulcrum at a specific position and providing a pressing portion, and improve the cleanability. The present inventors have found that a handle body and a toothbrush can be obtained and completed the present invention.
That is, this invention has the following aspects.

[1] A handle portion, a neck portion that extends from the tip of the handle portion, and a head portion that is provided at the tip of the neck portion and has a flocking surface formed thereon, extend to the rear end of the neck portion. The extended portion provided is inserted into the handle portion and is pivotally supported in the handle portion so as to be swingable in a direction facing the flocked surface, and the extended portion is pivotally supported in the handle portion. A fulcrum is formed at the handle portion, a pressing portion is provided on the rear end side of the extending portion from the fulcrum and on the side of the flocked surface, and the pressing portion is held when the handle portion is gripped. Is pressed, the handle portion is not deformed, and the extension portion, the neck portion, and the head portion are integrated, and the tip side of the fulcrum is the tip of the flocked surface with the fulcrum as an axis. It is rotated in a direction facing, and the extended portion and the handle portion The buffer member made of elastomer resin is provided, wherein the extended portion is surrounded by the cushioning material at least in the width direction, the rotation by the elasticity of said buffer member be stopped the pressing is returned to the original position Toothbrush handle body.
[2] A back surface rotation preventing portion that prevents the front end side of the fulcrum from rotating in the back direction of the flocked surface with the fulcrum as an axis is provided , and the back surface rotation preventing portion includes the extension portion. A rear end, a protruding piece provided on the handle part side of the pressing part, and a notch part formed in a part of a support member constituting the handle part in the rotating direction. The toothbrush handle body according to [1], which is formed by being positioned relative to the toothbrush.
[3] The buffer member covers at least the head part side from the fulcrum of the surface of the extended part on the side of the flocked surface, and the wall of the handle part located on both sides in the width direction of the extended part. The toothbrush handle body according to [1] or [2], which is fixed to each portion.
[4] A toothbrush comprising the toothbrush handle body according to any one of [1] to [3], and a bristle bundled on the flocked surface.

  According to the present invention, it is possible to provide a toothbrush handle body and a toothbrush that are capable of cleaning the back of the back teeth more easily and that can clean all the teeth satisfactorily and that are excellent in tooth cleaning.

It is a perspective view of one embodiment of the toothbrush of the present invention. It is a front view of the handle body for toothbrushes in embodiment of FIG. It is a rear view of the handle body for toothbrushes in embodiment of FIG. It is a left view of the handle body for toothbrushes in embodiment of FIG. It is D-D 'sectional drawing in FIG. (A) It is A-A 'sectional drawing in FIG. (B) It is B-B 'sectional drawing in FIG. (C) It is C-C 'sectional drawing in FIG. It is a partial front view of the handle body for toothbrushes in other embodiment of the toothbrush of this invention. It is a partial left view of the handle body for toothbrushes in embodiment of FIG. It is a partial rear view of the handle body for toothbrushes in embodiment of FIG. (A) It is E-E 'sectional drawing in FIG. (B) It is F-F 'sectional drawing in FIG. (C) It is G-G 'sectional drawing in FIG. It is a partial left view of the handle body for toothbrushes in other embodiment of the toothbrush of this invention. It is a partial left view of the handle body for toothbrushes in other embodiment of the toothbrush of this invention.

≪Toothbrush≫
The toothbrush of the present invention includes a toothbrush handle body and a hair bundle.
The handle body for a toothbrush of the present invention includes a handle portion, a neck portion extending from the tip of the handle portion, and a head portion provided at the tip of the neck portion and having a flocked surface formed thereon.
Moreover, the extended part extended in the rear end of the said neck part is inserted in the said handle part, and is pivotally supported in the said handle part so that it can rock | fluctuate in the direction which the said flocking surface faces. A fulcrum is formed by the extension portion being pivotally supported in the handle portion.
Moreover, the said handle | steering-wheel part is provided with the press part in the rear end side from the said fulcrum of the said extension part, and the said flocked surface side. When the pressing portion is pressed, the extension portion, the neck portion, and the head portion are integrated, and the tip side from the fulcrum is rotated in the direction in which the flocked surface faces, with the fulcrum as an axis. The

<First embodiment>
Hereinafter, with reference to FIGS. 1-6, the toothbrush 1 of 1st embodiment of this invention is demonstrated. The toothbrush 1 shown in FIG. 1 is provided with a bristle bundle 41 on a long toothbrush handle body 2.

[Toothbrush handle]
As shown in FIG. 1, the toothbrush handle body 2 of the present embodiment is provided with a handle portion 13, a neck portion 12 extending from the tip of the handle portion 13, and a tip of the neck portion 12, And a head portion 11 having a surface 43 formed thereon. The toothbrush handle body 2 has an elongated shape as a whole.
The length of the toothbrush handle body 2 of the present embodiment is not particularly limited, and is, for example, 120 to 200 mm.

(Element)
As shown in FIGS. 2 to 6, the toothbrush handle body 2 of this embodiment includes a swing member 4, a support member 5, and a buffer member 31. Hereinafter, each member will be described.

Swing member:
As shown in FIGS. 2 to 5, the swing member 4 includes a head portion 11, a neck portion 12, and an extending portion 21 that extends at the rear end of the neck portion 12.

As shown in FIG. 2, the head part 11 is flat form and the flocked surface 43 is formed in the single side | surface. A flocked hole 42 is formed in the flocked surface 43.
The width | variety of the head part 11 is not specifically limited, For example, 7-13 mm is preferable and 8-12 mm is more preferable. If it is more than the said lower limit, the area which flocks the hair | bristle bundle 41 can fully be ensured, and if it is below the said upper limit, the operativity in an intraoral area will be improved.
The length of the head part 11 is not specifically limited, For example, 10-30 mm is preferable and 12-28 mm is more preferable. If it is more than the said lower limit, the area which flocks the hair | bristle bundle 41 can fully be ensured, and if it is below the said upper limit, the operativity in an intraoral area will be improved.
The thickness of the head portion 11 can be determined in consideration of the material and the like, and is preferably 2 to 6 mm, and more preferably 2.5 to 4 mm, for example. If it is more than the said lower limit, the intensity | strength of the head part 11 can be raised, and if it is below the said upper limit, the operativity in an intraoral area will be improved.

As shown in FIGS. 2 to 5, the neck portion 12 has a rod shape and extends at the rear end of the head portion 11. The cross-sectional shape of the neck portion 12 may be a polygonal shape such as a square or a circular shape.
The thickness of the neck portion 12 can be determined in consideration of the material and the like, and is preferably 3 to 6 mm, and more preferably 3.5 to 4.5 mm. If it is more than the said lower limit, the intensity | strength of the neck part 12 can be raised, and if it is below the said upper limit, the operativity in an oral cavity will be improved.

As shown in FIGS. 2 to 6, the extending portion 21 is extended to the rear end of the neck portion 12.
The shaft portion 6 projects from the extending portion 21 in a direction orthogonal to the extending direction (FIGS. 2 to 5, 6 (a)).
As shown in FIG. 2, the rear end side of the extending portion 21 from the shaft portion 6 has an elliptical shape in a front view in which the length direction of the toothbrush handle body 2 is the long diameter. A convex portion is formed on the flocked surface 43 side in the oval portion of the front view.
As shown in FIGS. 2 to 4, a projecting piece 25 is provided at the rear end of the extending portion 21.
Note that the boundary between the extended portion 21 and the neck portion 12 is the boundary between the handle portion 13 and the neck portion 12 in the toothbrush handle body 2 and is referred to as a boundary portion 3 in this embodiment.

The material of the oscillating member 4 is usually selected from resin in consideration of required rigidity, mechanical characteristics, and the like.
Examples of the resin used for the swing member 4 include polyesters such as polybutylene terephthalate (PBT), polyethylene terephthalate (PET), and polycyclohexylene dimethylene terephthalate (PCT); polyacetal resin (POM); polypropylene (PP), Polyolefins such as polyethylene (PE); polystyrene (PS); acrylonitrile / butadiene / styrene resin (ABS), cellulose propionate (CP), polyarylate, polycarbonate, acrylonitrile / styrene copolymer resin (AS), and the like. Among these, PBT, PET, PCT, and POM are preferable, and PBT and POM are more preferable. If PBT, PET, PCT, and POM are included, the rigidity is higher, so that sufficient strength can be obtained even if the head portion 11 is thinned.
These resins may be used alone or in combination of two or more.

Support member:
As shown in FIGS. 2 to 5, the support member 5 has two wall portions 24 formed by branching the distal end side in the width direction. A receiving portion 29 into which the extending portion 21 is inserted is formed in an area surrounded by the wall portions 24 and 24. In the present embodiment, the branched portion of the support member 5 is referred to as a branch point 27.
As shown in FIGS. 2 to 4, a notch 26 is formed on the back surface of the support member 5 at the branch point 27.
As shown in FIGS. 2 to 5 and 6 (a), a bearing portion 28 is formed on the inner surface of each wall portion 24. The bearing portion 28 has a shape in which the shaft portion 6 is fitted when the extended portion 21 is inserted into the handle portion 13.
The cross-sectional shape of the support member 5 on the rear end side from the branch point 27 may be a polygonal shape such as a square or a circular shape.

  The material of the support member 5 can be selected from the same material as the swing member 4. The kind of the material of the support member 5 may be one kind alone, or two or more kinds may be combined. The material of the support member 5 used may be the same as or different from the material of the swing member 4.

Buffer member:
As shown in FIGS. 1 to 5, 6 (a) and (b), the receiving portion 29 is filled with an elastomer resin. That is, a buffer member 31 made of an elastomer resin is formed between the extending portion 21 and the handle portion 13.
Examples of the elastomer resin include olefin-based elastomers, styrene-based elastomers, polyester-based elastomers, polyurethane-based thermoplastic elastomers, and the like. Of these, styrene-based elastomers are preferable. Since the styrene elastomer is particularly excellent in elasticity, the operability of bending is further improved.
These resins may be used alone or in combination of two or more.

(Relationship between members)
As shown in FIGS. 1 to 5, 6 (a) and (b), the extending portion 21 of the swing member 4 is inserted into the support member 5, that is, the handle portion 13. Thereby, the wall part 24 will be located in the width direction both sides of the extension part 21. FIG.
The shaft portion 6 of the extending portion 21 is fitted to the bearing portion 28 of the support member 5. Thereby, the extending part 21 is pivotally supported in the handle part 13 so as to be able to swing in the direction in which the flocked surface faces. The extending portion 21 is pivotally supported in the handle portion 13 to form a fulcrum 22.
As shown in FIGS. 4, 6 (a) and (b), the protruding end of the convex portion formed on the flocked surface 43 side of the extending portion 21 protrudes from the surface of the handle portion 13 on the flocked surface 43 side, and the pressing portion 23. (FIG. 4).
As shown in FIGS. 4 and 6 (c), the protruding piece 25 and the notch 26 are positioned relative to each other. Since the protruding piece 25 and the notch portion 26 are positioned to face each other, a back surface rotation preventing portion is formed. The back surface rotation preventing portion prevents the front end side of the fulcrum 22 from rotating in the back direction of the flocked surface 43 with the fulcrum 22 as an axis.

[Hair bundle]
As shown in FIG. 1, the toothbrush 1 of the present embodiment includes the above-described toothbrush handle body 2 and a plurality of hair bundles 41 planted in the head portion 11. Specifically, the hair bundle 41 is implanted in the flock hole 42 shown in FIG.
The hair bundle 41 is a bundle of a plurality of hairs.
The length (hair length) from the flocked surface of the head portion 11 to the tip of the hair bundle 41 can be determined in consideration of the hair and the like required for the hair bundle 41, and is, for example, 6 to 13 mm.
All the hair bundles 41 may have the same hair length or may be different from each other.

  The thickness (hair bundle diameter) of the hair bundle 41 can be determined in consideration of the hair and the like required for the hair bundle 41, and is, for example, 1 to 3 mm. All the hair bundles 41 may have the same hair bundle diameter or may be different from each other.

  As the hair constituting the hair bundle 41, for example, the diameter of the hair gradually decreases toward the hair tip, the hair having a sharp hair tip (tapered hair), the diameter of the hair from the flocked surface toward the hair tip is almost the same. The hair for the same (straight hair) etc. are mentioned. Examples of the straight hair include those in which the hair tip is a flat surface substantially parallel to the flocked surface and those in which the hair tip is rounded into a hemisphere.

The material of the hair is, for example, polyamide such as 6-12 nylon (6-12NY), 6-10 nylon (6-10NY), PET, PBT, polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), Examples thereof include polyesters such as polybutylene naphthalate (PBN), polyolefins such as PP, elastomer resins such as polyolefin elastomers and styrene elastomers.
These resin materials can be used singly or in combination of two or more.
Examples of the bristle include polyester bristle having a multi-core structure having a core and at least one or more sheaths provided outside the core.

  The cross-sectional shape of the hair is not particularly limited, and may be a circle such as a perfect circle or an ellipse, a polygon, a star, a three-leaf clover, a four-leaf clover, or the like. The cross-sectional shapes of all the hairs may be the same or different.

  The thickness of the hair can be determined in consideration of the material and the like. When the cross section is circular, for example, the thickness is 6 to 9 mil (1 mil = 1/1000 inch = 0.025 mm). Moreover, in consideration of a feeling of use, a feeling of cleaning, a cleaning effect, durability, and the like, a plurality of hairs having different thicknesses may be used in any combination.

[Production method]
As a manufacturing method of the toothbrush 1, for example, the cushioning member 31 is formed by insert molding or the like by combining the swing member 4 and the support member 5 obtained by a known molding method such as injection molding, and the handle for the toothbrush. Obtain body 2. Next, the hairbrush 41 is implanted in the flocked hole 42 formed in the flocked surface 43 of the head portion 11, and the toothbrush 1 is obtained.

Hereinafter, a specific procedure of the above-described insert molding will be described.
First, the extending portion 21 of the swing member 4 is inserted into the receiving portion 29 of the support member 5, the shaft portion 6 is fitted to the bearing portion 28, and the swing member 4 and the support member 5 are combined. The combined swing member 4 and support member 5 are placed in the mold and the mold is closed. Inside the mold, a cavity having a shape corresponding to the buffer member 31 is formed in a state where the swing member 4 and the support member 5 are arranged.
Next, the elastomer resin is injected into the mold in a state where the swing member 4 and the support member 5 are disposed inside the mold. The elastomer resin injected into the mold is filled in the cavity. And the buffer member 31 is formed.

  As a method for flocking the hair bundle 41, the hair bundle 41 is folded in half and a flat wire sandwiched between the two is driven into the flock hole 42 to plant the hair bundle 41, and the lower end of the hair bundle 41 is the flock hole. In-mold in which a fusing hole 42 is formed by injecting the molten resin into a mold after the lower end of the hair bundle 41 is heated to form a molten lump. Law.

[how to use]
When the toothbrush 1 is used, the teeth are usually cleaned while grasping the handle portion 13.
What is necessary is just to use without pressing the press part 23, when polishing a front tooth etc. FIG. The toothbrush 1 includes a back surface rotation prevention unit. Even if the distal end side of the fulcrum 22 of the swinging member 4 tries to rotate in the back direction of the flocked surface 43 (Y direction in FIG. 4) about the fulcrum 22, the projecting piece 25 and the notch 26 are used. Cannot rotate. For this reason, the brushing pressure is not easily absorbed by the rotation of the head portion 11 in the back direction, and the brushing pressure can be sufficiently applied to the teeth.
When brushing the back of the back teeth, the pressing portion 23 is pressed with a thumb or the like. When the pressing portion 23 is pressed, the swing member 4 rotates in the direction of X in FIG. 4 around the fulcrum 22 to become the swing member 4a. That is, by pressing the pressing portion 23, the extending portion 21, the neck portion 12, and the head portion 11 are integrated, and the distal end side of the fulcrum 22 rotates in the desired direction of the flocked surface 43, so that the toothbrush handle The body 2 bends. At this time, the degree of bending of the toothbrush handle body 2 is adjusted by the magnitude of the force applied to the pressing portion 23. By brushing the back of the back teeth while the toothbrush handle body 2 is bent, the tip of the hair bundle 41 can reach the back of the back teeth without applying excessive stress to the lips without opening the mouth wide. This makes it easier to polish the back of the back teeth.
If the pressing of the pressing portion 23 is stopped, the distal end side from the fulcrum 22 of the swinging member 4 rotates in the direction of the back surface of the flocked surface 43 (direction Y in FIG. 4), returns to the original position, and the front teeth and the like are moved. Can be polished.

[Function and effect]
According to the present embodiment, by pressing the pressing portion 23, the extending portion 21, the neck portion 12, and the head portion 11 are integrated with the fulcrum 22 as an axis, and the tip side from the fulcrum 22 faces the flocked surface 43. By rotating in the direction, the toothbrush handle body 2 can be largely bent. For this reason, even if it does not open a mouth large, without applying excessive stress to lips, the cleaning property of teeth can be improved.
According to this embodiment, since the buffer member 31 made of an elastomer resin is formed between the extending portion 21 and the handle portion 13, if the pressing of the pressing portion 23 is stopped, the extending portion 21 and the neck portion are stopped. 12 and the head part 11 can be returned to their original positions. Further, since the buffer member 31 is provided, moderate elasticity is imparted when the pressing portion 23 is pressed, flexibility is imparted to the operability of the rotation, and the brushing pressure does not become so strong that the gums are hardly damaged.
Since this embodiment is provided with a back surface rotation preventing portion, the front end side of the fulcrum 22 is prevented from rotating in the back direction of the flocked surface 43 with the fulcrum 22 as an axis. For this reason, the brushing pressure is not easily absorbed by the rotation of the head portion 11 in the back direction, the brushing pressure can be sufficiently applied to the teeth, and even when the pressing portion 23 is not pressed, the cleaning performance of the teeth is lowered. There is nothing.

<Second Embodiment>
Hereinafter, with reference to FIGS. 7-10, the toothbrush 7 of 2nd embodiment of this invention is demonstrated.
In addition, the hair | bristle bundle to be flocked to the handle | steering-wheel body 8 for toothbrushes, and its flocking method are the same as that of the above-mentioned 1st embodiment. Moreover, the manufacturing method of the toothbrush 7 is the same as the manufacturing method of the toothbrush 1 of the above-mentioned 1st embodiment.

[Toothbrush handle]
The toothbrush handle body 8 of this embodiment includes a handle portion 62, a neck portion 67 extending from the tip of the handle portion 62, and a head portion provided at the tip of the neck portion 67 and having a flocked surface formed thereon. And. 7 to 9, the head portion, the front end side of the neck portion 67, the rear end side of the handle portion 62, and the hair bundle are the same as those in the first embodiment described above, and thus illustration thereof is omitted. .
The length of the toothbrush handle body 8 of this embodiment is the same as that of the first embodiment described above.

(Element)
As shown in FIGS. 7 to 10, the toothbrush handle body 8 of this embodiment includes a swing member 51, a support member 61, and a buffer member 71. Hereinafter, each member will be described.

Swing member:
The swing member 51 includes a head portion, a neck portion 67, and an extending portion 52 extending at the rear end of the neck portion 67. The head portion and neck portion 67 are the same as those in the first embodiment described above.

As shown in FIGS. 7 to 10, the extending portion 52 extends at the rear end of the neck portion 67.
A bearing portion 53 that is a concave line extending in the width direction is formed on the back surface of the extended portion 52.
As shown in FIG. 7, the rear end side of the extended portion 52 from the bearing portion 53 has an elliptical shape in a front view in which the length direction of the toothbrush handle body 8 is a long diameter. Convex portions are formed on the flocked surface side of the oval portion in front view (FIGS. 8, 10 (a) and (b)).
As shown in FIGS. 7 to 9, in the extended portion 52, a flat plate-like protruding piece 54 protrudes in the direction toward the handle portion 62.
The material of the extension part 52 is the same as the material of the extension part 21 described above.

Support member:
As shown in FIGS. 8, 10 (a) and 10 (b), the support member 61 has two wall portions 66 formed by branching the distal end side in the width direction. A receiving portion 63 into which the extending portion 52 is inserted is formed in a region surrounded by the wall portions 66 and 66. In the present embodiment, the branched portion of the support member 61 is referred to as a branch point 68.
As shown in FIGS. 7 to 9 and 10 (c), a notch 65 is formed at the branch point 68 on the back surface of the support member 61.
As shown in FIGS. 8 and 10 (a), a shaft portion 64 extending from one wall portion 66 to the other wall portion 66 is provided on the back surface side at the distal end side of the support member 61. The shaft portion 64 is shaped to be fitted to the bearing portion 53 when the extending portion 52 is inserted into the handle portion.
The material of the support member 61 is the same as that of the support member 5 described above.

Buffer member:
As shown in FIGS. 7 to 10, a buffer member 71 made of an elastomer resin is formed between the swing member 51 and the support member 61, that is, between the extending portion 52 and the handle portion 62. By providing the buffer member 71, the swing member 51 and the support member 61 are connected to form the toothbrush handle body 8.
The elastomer resin is the same as that used for the buffer member 31 described above.

(Relationship between members)
As shown in FIGS. 7 to 9, 10 (a) and (b), the extending portion 52 is disposed in the receiving portion 63.
In the present embodiment, the shaft portion 64 is fitted into the bearing portion 53 formed on the back surface of the extension portion 52, and the extension portion 52 is pivotally supported in the handle portion 62. Is formed.
As shown in FIGS. 8, 10 (a) and 10 (b), the pressing portion 55 is formed by a convex protrusion protruding from the buffer member 71 toward the flocked surface.

  As shown in FIGS. 8 and 10 (c), the projecting piece 54 and the notch 65 are positioned relative to each other. Since the projecting piece 54 and the notch 65 are positioned relative to each other, a back surface rotation preventing portion is formed. The back surface rotation preventing portion prevents the distal end side of the fulcrum 70 from rotating in the back direction of the flocked surface with the fulcrum 70 as an axis.

[how to use]
When the toothbrush 7 is used, the teeth are usually cleaned while grasping the handle portion 62.
When the front teeth and the like are polished, the pressing portion 55 may be used without pressing. The toothbrush 7 includes a back surface rotation prevention unit. Even if the tip end side of the fulcrum 70 of the oscillating member 51 tries to rotate in the back direction of the flocked surface with the fulcrum 70 as an axis, it cannot be rotated by the protruding piece 54 and the notch 65. For this reason, the brushing pressure is not easily absorbed by the rotation of the head portion in the back direction, and the brushing pressure can be sufficiently applied to the teeth.
When brushing the back of the back teeth, the pressing portion 55 is pressed with a thumb or the like. When the pressing portion 55 is pressed, the swinging member 51 is rotated about the fulcrum 70 and the distal end side of the fulcrum 70 is bent, and the toothbrush handle body 8 is bent. That is, by pressing the pressing portion 55, the extending portion 52, the neck portion 67, and the head portion are integrated, and the tip side rotates from the fulcrum 70 in the desired direction of the flocked surface, and the toothbrush handle body 8. Bends. At this time, the degree of bending of the toothbrush handle body 8 is adjusted by the magnitude of the force applied to the pressing portion 55. By brushing the back of the back teeth while the toothbrush handle body 8 is bent, the tip of the hair bundle can reach the back of the back teeth without applying excessive stress to the lips without opening the mouth wide. This makes it easier to polish the back of the back teeth.
If the pressing of the pressing portion 55 is stopped, the distal end side from the fulcrum 70 of the swinging member 51 rotates in the direction of the back surface of the flocked surface, returns to the original position, and the front teeth and the like can be polished.

[Function and effect]
According to the present embodiment, by pressing the pressing portion 55, the extending portion 52, the neck portion 67, and the head portion are integrated with the fulcrum 70 as an axis, and the tip side from the fulcrum 70 faces the flocked surface. The toothbrush handle body 8 can be greatly bent by turning. For this reason, even if it does not open a mouth large, without applying excessive stress to lips, the cleaning property of teeth can be improved.
According to this embodiment, since the buffer member 71 made of an elastomer resin is formed between the extended portion 52 and the handle portion, the extended portion 52 and the neck portion 67 are stopped if the pressing of the pressing portion 55 is stopped. And the head portion can be returned to their original positions. In addition, since the buffer member 71 is provided, when the pressing portion 55 is pressed, an appropriate elasticity is given to give flexibility to the operability of the rotation, and the brushing pressure does not become so strong that the gums are hardly damaged.
Since this embodiment is provided with a back surface rotation preventing portion, the front end side of the fulcrum 70 is prevented from rotating in the back direction of the flocked surface with the fulcrum 70 as an axis. For this reason, the brushing pressure is not easily absorbed by the rotation of the head portion in the back direction, the brushing pressure can be sufficiently applied to the teeth, and even when the pressing portion 55 is not pressed, the cleaning performance of the teeth is lowered. There is no.

<Other embodiments>
In any of the above-described embodiments (particularly, see FIGS. 4, 6 (b) and FIGS. 8, 10 (b)), the convex portion of the swinging member protrudes from the buffer member toward the flocked surface to form a pressing portion. Has been. However, if the pressing portion is pressed and the extension portion, the neck portion, and the head portion can be integrally rotated about the fulcrum as a shaft, the tip side of the fulcrum can be rotated in the direction in which the flocked surface faces. The protruding end may not protrude from the buffer member toward the flocked surface. For example, the convex protrusion may be covered with the elastomer resin of the buffer member. Even if it is covered with the buffer member, the convex protrusion can be pressed through the elastomer resin because the elastomer resin has elasticity. In this case, the portion of the elastomer resin to be pressed becomes the pressing portion.
Further, the protruding portion may not be formed on the flocked surface side on the rear end side of the swinging member, but may be covered with the elastomer resin of the buffer member (see FIG. 11). The elastomer resin that covers the rear end side of the swing member is the pressing portion 56. Furthermore, the portion of the elastomer resin that covers the rear end side of the swinging member may be convex to form the pressing portion 57 (see FIG. 12). In either case, the rear end side of the extending portion can be pressed via the elastomer resin.

In this invention, the back surface rotation prevention part may be provided and does not need to be provided. It is preferable that a back surface rotation preventing portion is provided from the viewpoint that the distal end side of the fulcrum can be prevented from rotating in the direction of the back surface of the flocked surface and brushing pressure can be sufficiently applied to the teeth.
When the back surface rotation preventing unit is provided, the back surface rotation preventing unit may be any member that can prevent the distal end side of the fulcrum from rotating in the direction of the back surface of the flocked surface. For example, the protruding pieces may be provided not on the rear end of the extending portion but on both sides in the width direction, and the notches may be formed at positions corresponding to the protruding portions. Further, the protruding piece 25 and the notch portion 26 employed in the first embodiment described above may be employed in the second embodiment, and the protruding piece 54 and the notch portion employed in the second embodiment. 65 may be adopted in the first embodiment.
In addition, the back surface rotation prevention portion is provided with a structure that bridges the wall portion between the wall portion on the flocking surface side of the support member, so that the rear end side of the fulcrum does not rotate in the direction of the flocking surface, As long as the tip side can be prevented from rotating in the direction of the back surface of the flocked surface, it does not have to be formed by the protruding piece or the notch.

In the first embodiment described above, the buffer member may or may not be provided. If the pressing of the pressing part 23 is stopped, the extending part 21, the neck part 12 and the head part 11 can be returned to their original positions, the flexibility of the rotation operability is given, and the gums are not easily damaged. From the point, it is preferable that the buffer member is provided.
In the first embodiment described above, the swing member 4 and the support member 5 may be integrally formed. In this case, the extending portion 21 is pivotally supported in the handle portion 13 so as to be swingable in the direction in which the flocked surface faces by making the shaft portion 6 a material having elasticity or allowing the twisted shape. The Further, since the shaft portion 6 is integrated with the bearing portion 28, the swing member 4 and the support member 5 become one member.

1,7,80,84 toothbrush;
2,8,81,85 toothbrush handle body;
3 borders;
4, 51 swing member;
5,61 support member;
6,64 shafts;
11 head part;
12,67 neck part;
13, 62, 83, 87 handle portion;
21, 52, 82, 86 extension part;
22,70 fulcrum;
23, 55, 56, 57 pressing part;
24,66 walls;
25, 54 protruding pieces;
26, 65 notch;
27, 68 branch point;
28,53 bearing part;
29,63 receiving part;
31, 71 cushioning member;
41 hair bundles;
42 flocking holes;
43 Flocking surface

Claims (4)

A handle portion; a neck portion extending from the tip of the handle portion; and a head portion provided at the tip of the neck portion and having a flocked surface formed thereon,
An extending portion extending at the rear end of the neck portion is inserted into the handle portion, and is pivotally supported in the handle portion so as to be swingable in a direction facing the flocking surface. A fulcrum is formed by being pivotally supported in the handle,
The handle portion is provided with a pressing portion on the rear end side from the fulcrum of the extending portion and on the flocked surface side,
When the pressing portion is pressed when gripping the handle portion , the handle portion is not deformed, and the extension portion, the neck portion, and the head portion are integrated, and the fulcrum is pivoted. Then, the tip side from the fulcrum is rotated in the direction in which the flocked surface faces,
Between the extension portion and the handle portion, a buffer member made of an elastomer resin is provided,
The extending portion is surrounded by the buffer member at least in the width direction,
If the pressing is stopped, the rotation returns to the original position due to the elasticity of the buffer member,
Handle body for toothbrush. A back rotation preventing portion that prevents the tip side from the fulcrum from rotating in the back direction of the flocked surface with the fulcrum as an axis ,
The back rotation prevention part is
A projecting piece provided at the rear end of the extending portion and closer to the handle portion than the pressing portion;
A notch portion formed in a part of the support member constituting the handle portion is formed by being positioned relative to the rotating direction,
The toothbrush handle body according to claim 1. The buffer member covers at least the head part side of the surface of the extended part on the flocked surface side with respect to the fulcrum and is provided on the wall part of the handle part located on both sides in the width direction of the extended part. The toothbrush handle body according to claim 1 or 2, wherein the handle body is fixed . Toothbrush handle body according to any one of claims 1 to 3,
A toothbrush having a hair bundle planted in the head portion.

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