JP6315866B1 - toothbrush - Google Patents

Abstract

In a toothbrush in which a head part and a handle part are configured separately, a toothbrush that can be used stably without rotation of the head part during tooth brushing is provided. A head base 30 of a toothbrush 1 has a cross-shaped recess 31 on the front side, and has a through hole 32 penetrating in the thickness direction of the head base 30 at the center of the cross shape. The hair bundle 10 is planted on one main surface 21, and the other main surface 22 has a cross-shaped convex portion 23 that can be fitted into the concave portion 31, and protrudes from the cross-shaped center portion in the thickness direction to protrude from the head base. The bolt part 24 can be inserted into the through hole 32 of the bolt 30, the bolt part 24 is inserted into the through hole 32 from the front side of the head base 30, and the convex part 23 is fitted to the concave part 31. Is fixed by a cap-like member 60 inserted into the through hole 32 from the back side of the head base 30. [Selection] Figure 1

Description

  The present invention relates to a toothbrush, and more particularly to a toothbrush in which a head portion and a handle portion are configured separately.

  Conventional toothbrushes generally have a straight (one-letter shape) structure with a handle attached to the short side of the brush body in which bristles are implanted, and toothbrushing movements in the left-right direction are easy, but the vertical direction The movement of toothpaste tended to be biased in the left-right direction. However, such a toothbrushing that moves the toothbrush in the left-right direction has a problem in that it cannot sufficiently brush the teeth and easily induces tooth decay and periodontitis.

  In order to solve such a problem, Patent Document 1 discloses that a brush base is connected to the rotating shaft of the toothbrush so that the brush base can be rotated to the left and right, and is provided in the groove of the concave stopper. A rotating toothbrush is described in which the stopper is retracted.

Utility Model Registration No. 3012475

  However, in the toothbrush described in Patent Document 1, there is a possibility that the convex stopper may rotate in the groove of the concave stopper during brushing, and it is impossible to stably brush the teeth at a desired angle. There is a point.

  The present invention has been made to solve the above-described problems, and in a toothbrush in which a head part and a handle part are configured separately, a toothbrush that can be used stably without rotating the head part during toothbrushing. The purpose is to provide.

  In order to achieve at least one of the above objects, a toothbrush according to the present invention includes a head portion in which a hair bundle is implanted, a head base that supports the head portion, a handle portion that a user grips, and the head A toothbrush having a base and a neck connecting the handle, wherein the head base has a cross-shaped recess on the front side, and in the thickness direction of the head base at the center of the cross The head portion has a cross-shaped convex portion that can be fitted with the concave portion of the head base on the other main surface, and the head portion has a hair bundle on one main surface. It has a bolt part that protrudes from the center of the cross shape in the thickness direction and can be inserted into the through hole of the head base, the bolt part is inserted into the through hole from the front side of the head base, and the convex part In a state where the concave portion is fitted, the bolt portion is Serial, characterized in that the head base on the back side and is fixed by a cap-like member inserted into the through hole.

  According to the present invention, the bolt portion is inserted from the front side of the head base into the through hole, and the bolt portion is inserted from the back side of the head base in the state where the convex portion is engaged with the concave portion. Since it is fixed by the cap-shaped member inserted into the hole, the head portion does not rotate or move in the thickness direction during user's brushing, and can be used stably.

In the above invention, the handle portion is inclined to the back side with respect to the main surface of the head portion as the distance from the head portion increases.
According to the present invention, by providing such an inclination, the brush surface can be applied flat to the teeth.

In the above invention, the neck portion bulges to the back side and is formed in a substantially arc shape in a side view.
According to the present invention, it is possible to prevent the neck from hitting the lips during brushing and making it difficult to brush the teeth.

A hooking portion protruding outward is formed near the center of the back surface of the handle portion.
ADVANTAGE OF THE INVENTION According to this invention, when a user performs the operation | movement scraped out from an oral cavity, a hook part becomes a finger | toe catch and can prevent a hand slipping.

In the above invention, the surface of the tip of the hair constituting the hair bundle is provided with irregularities.
According to the present invention, dirt between the teeth and the surface of the teeth can be easily removed by the unevenness provided on the surface of the tip of the hair.

(A) is a front view of the T-shaped toothbrush which concerns on embodiment of this invention, (b) is the side view. (A) is the front view of a linear toothbrush at the time of rotating the head part of the toothbrush shown in FIG. 1 90 degrees, (b) is the side view. (A) is a rear view of a head base part, (b) is a side view of a head base part when the surface shown to (a) is made into an upper surface. (A) is a figure of the main surface of the side connected with a head stand among the main surfaces of a head part, (b) is a side view of the longitudinal direction of a head part when the surface shown to (a) is made into a lower surface. It is. (A) is a top view of a cap-shaped member, (b) is sectional drawing by the AA line shown to (a).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1A is a front view of a T-shaped toothbrush according to an embodiment of the present invention, FIG. 1B is a side view thereof, and FIG. 2A is a 90 ° rotation of the head portion of the toothbrush shown in FIG. The front view of the linear toothbrush at the time of letting it be, (b) is the side view.

  The toothbrush 1 which concerns on one embodiment of this invention is the head part 20 by which the hair | bristle bundle 10 was planted, the head base 30 which supports the head part 20, the handle | grip part 40 which a user hold | grips, and the head base 30 It has a neck portion 50 that connects the handle portion 40. The toothbrush 1 is mainly made of synthetic resin.

  In the following description, the surface (the surface shown in FIG. 1 (a)) where the end face of the bristle bundle 10 of the toothbrush 1 can be visually recognized is the front surface of the toothbrush 1, and the surface where the opposite bristle bundle 10 is not visible is the back surface.

  FIG. 3A is a rear view of the head base 30 provided at the tip portion of the toothbrush 1, and FIG. 3B is a side view of the head base 30 when the surface shown in FIG. .

  A cross-shaped recess 31 is provided on the front side of the head base 30. In addition, a through-hole 32 that penetrates in the thickness direction of the head base 30 is provided in the cross-shaped central portion of the recess 31. In the present embodiment, the thickness of the head base 30 is 4 mm, the front and back surfaces are formed in a square shape with a side of 8 mm, and the depth of each of the four radial grooves constituting the cross-shaped recess 31 is 1 mm. The length is 2.5 mm and the width is 1 mm. A stepped portion 33 is formed in the through hole 32 at a depth of 3 mm from the back side, and a diameter from the back side to the stepped portion 33 (up to a depth of 3 mm) is 5 mm. Moreover, the depth from the front side of the through-hole 32 to the step part 33 is formed to 1 mm, and the diameter from the front side to the step part 33 (to a depth of 1 mm) is formed to 3 mm.

  4A is a view of the main surface of the main surface of the head portion 20 on the side connected to the head base 30 (that is, the side opposite to the main surface on which the hair bundle 10 is implanted). FIG. 7B is a side view in the longitudinal direction of the head portion 20 when the surface shown in FIG.

  The head portion 20 is formed to be small and thin in order to easily reach the back of the oral cavity and easily brush the back teeth. In the present embodiment, the thickness of the head portion 20 is 3 mm, and the sizes of the main surfaces 21 and 22 are 8 mm × 23 mm.

  A plurality of tuft holes (not shown) are provided on one main surface of the head portion 20, and a hair bundle 10 which is a bundle of hair made of synthetic resin is implanted and fixed in each tuft hole. The hair bundle 10 is planted so that the surface connecting the front end surfaces thereof is parallel to the main surfaces 21 and 22 of the head portion 20. The plurality of hairs constituting the hair bundle 10 are preferably short and thin. Concavities and convexities (not shown) are provided on the surface of the tip of each hair (for example, about 2 mm from the tip). This unevenness is preferably the same as that provided on the surface of the dental floss. By providing irregularities on the hair surface, dirt and plaque between the tooth surface and the teeth can be efficiently removed.

  On the other main surface 22 of the head portion 20, a cross-shaped convex portion 23 that can be fitted into the concave portion 31 of the head base 30 is formed. From the cross-shaped center part of the convex part 23, the volt | bolt part 24 protrudes the thickness direction outer side. The bolt portion 24 can be inserted into the through hole 32 of the head base 30. An outer screw 25 that can be screwed with a cap-like member 60 described later is formed on the outer periphery of the bolt portion 24.

  Each size of the four radial projections constituting the cross-shaped convex portion 23 is formed to be approximately the same size as the four grooves of the concave portion 31 so as to be fitted to the concave portion 31 of the head base 30. The bolt portion 24 has a diameter of about 3 mm so that it can be inserted into the through hole 32 of the head base 30 from the front side.

  The bolt portion 24 of the head portion 20 is inserted into the through hole 32 from the front side of the head base 30 and the convex portion 23 of the head portion 20 is fitted in the concave portion 31 of the head base 30. Is fixed by a cap-like member 60 inserted into the through hole 32 from the back side of the head base 30.

  FIG. 5A is a plan view of the cap-shaped member 60, and FIG. 5B is a cross-sectional view taken along line AA shown in FIG. The cap-shaped member 60 is a cap having a cylindrical inner wall on which an inner screw 61 is formed.

  The cap-shaped member 60 has an outer diameter of 5 mm and an outer wall height of 3 mm. The inner wall on which the inner screw 61 is formed has a height of 2 mm and an inner diameter of 3 mm. The cap-like member 60 is inserted into the through-hole 32 while covering the bolt part 24 from the back side of the head base 30, and the inner screw 61 is screwed with the outer screw 25 of the bolt part 24 of the head part 20. In this state, the lower end portion of the cap-shaped member 60 contacts the stepped portion 33 of the through hole 32 and the convex portion 23 of the head portion 20, and the head of the cap-shaped member 60 is flush with the back surface of the head base 30.

  In this way, the inner screw 61 of the cap-like member 60 is screwed into the outer screw 25 of the bolt portion 24 of the head portion 20 inserted through the through hole 32 of the head base 30, so that the head portion 20 becomes the head. It can be stably fixed to the base 30 and can prevent the head portion 20 from moving in the thickness direction during tooth brushing. Further, by firmly screwing the outer screw 25 of the bolt portion 24 and the inner screw 61 of the cap-shaped member 60, the convex portion 23 of the head portion 20 and the concave portion 31 of the head base 30 are securely and securely fitted. Therefore, it is possible to prevent the head unit 20 from rotating during tooth brushing. In addition, the fixing means of the bolt part 24 and the cap-shaped member 60 can use arbitrary well-known means other than a screw.

  In order to rotate the head portion 20 by 90 ° with respect to the head base 30 and switch between the T shape and the linear shape of the toothbrush 1, the fixing by the cap-like member 60 is loosened, and the convex portion 23 of the head portion 20 and the head base 30 are The fitting with the concave portion 31 is once removed, the head portion 20 is rotated by 90 °, and the convex portion 23 of the head portion 20 is fitted with the concave portion 31 at a position 90 ° away from the concave portion 31 that has been fitted so far. After combining, the cap-shaped member 60 is tightened again.

  Returning to FIG. 1 and FIG. 2, the neck portion 50 that connects the head base 30 and the handle portion 40 has a shape that bulges to the back side, and is formed in a substantially arc shape in a side view. By making the neck part 50 curved in such a back direction, it is possible to prevent the neck part 50 from hitting the lips during brushing and making it difficult to brush the teeth.

  The handle 40 is a portion that the user grips when using the toothbrush 1. The handle portion 40 is inclined to the back side with respect to the main surfaces 21 and 22 of the head portion 20 as the distance from the head portion 20 increases. By this inclination, the hair bundle 10 implanted in the head part 20 can be applied flatly to the teeth. In the present embodiment, the angle between the main surface 21.22 of the head portion 20 and the axis of the handle portion 40 is 6 °. The angle is preferably 5 ° to 10 °.

  A hook 41 that protrudes outward is formed near the center of the back side of the handle 40. A step portion 42 is provided at the boundary between the end portion of the hook portion 41 on the neck portion 50 side and the handle portion 40, and the end portion of the hook portion 41 on the neck portion 50 side is an angle of approximately 90 ° from the handle portion 40. Protruding outward. The end of the hook 41 that is opposite to the neck 50 is connected to the handle 40 gently. When the user performs an operation of scooping out from the oral cavity, the hook portion 41 becomes a finger hook and the hand can be prevented from slipping from the handle portion 40.

  Moreover, the width | variety near the center of the handle | pattern part 40 is formed thicker than the width | variety of the other handle | pattern part 40, and the hook part which protrudes outside in the mountain shape is formed in the both sides | surfaces near the center of the handle | pattern part 40 43 is formed. The hook 43 can also prevent the hand from slipping from the handle 40.

  As shown in FIG. 1, the toothbrush 1 configured as described above is configured such that the concave portion 31 and the convex portion 23 are fitted so that the longitudinal direction of the head portion 20 and the longitudinal direction of the handle portion 40 are orthogonal to each other. When the head 20 and the head base 30 are fixed, the overall shape is T-shaped. In the case of this shape, it is easy to move the hair bundle 10 planted in the head portion 20 by gripping the handle portion 40 by hand and vertically in the interdental space. As a result, instead of brushing multiple teeth together in the left-right direction, each tooth and teeth can be brushed carefully along the vertical direction individually, and between teeth and between teeth and gums. Plaque can be easily removed.

  Further, when the concave portion 31 and the convex portion 23 are fitted so that the longitudinal direction of the head portion 20 and the longitudinal direction of the handle portion 40 are parallel to each other, the head portion 20 and the head base 30 are fixed. It becomes linear. In the case of this shape, it can be used with conventional ease of use, and is highly convenient when the toothbrush 1 needs to be linear when stored in a portable storage case.

  Moreover, since the strength of the head part 20 is increased by providing the convex part 23 on the head part 20, the thickness of the head part 20 can be reduced. By reducing the thickness of the head part 20, the head part 20 can be easily inserted to the back of the oral cavity, and the back teeth can be easily polished.

  As described above, in the toothbrush 1, the bolt portion 24 is inserted into the through hole 32 from the front side of the head base 30 and the convex portion 23 is engaged with the concave portion 31, and the bolt portion 24 is the back surface of the head base 30. Since it is fixed by the cap-shaped member 60 inserted into the through-hole 32 from the side, the head portion 20 is firmly fixed by the head base 30 and the cap-shaped member 60, and the head portion 20 rotates or rotates in the thickness direction during brushing. It can be used stably without moving.

It should be noted that when the user rotates the head unit 20 by 90 °, a depression is formed around the center of the head of the cap-shaped member 60 and so that the user can easily loosen the screw by pinching the cap-shaped member 60 with his / her finger. You may provide, and you may provide a protrusion in the center part of a head. When a recess is provided in the center of the head of the cap-shaped member 60, a slit-shaped member having a width of 2 mm and a depth of 0,3 mm is preferable so that a coin or the like can be inserted into the recess and rotated. Further, the height of the outer wall of the cap-shaped member 60 may be higher than 3 mm so that the head of the cap-shaped member 60 is exposed from the back surface of the head base 30 with the cap-shaped member 60 tightened.
Moreover, the size of each member in embodiment mentioned above is only an example, and can be arbitrarily designed within the range which can implement this invention.

DESCRIPTION OF SYMBOLS 1 ... Toothbrush 10 ... Hair bundle 20 ... Head part 21 ... One main surface 22 ... The other main surface 23 ... Convex part 24 ... Bolt part 25 ... External screw 30 ... head base 31 ... concave 32 ... through hole 33 ... step part 40 ... pattern part 41 ... hook part 42 ... step part 43 ... hook part 50 ... Neck part 60 ... Cap-shaped member 61 ... Inner screw

Claims (5)

A toothbrush having a head part in which a hair bundle is implanted, a head base that supports the head part, a handle part that a user grips, and a neck part that connects the head base and the handle part,
The head base has a cross-shaped concave portion on the front side, and has a through-hole penetrating in the thickness direction of the head base at the cross-shaped central portion,
The head portion has a hair bundle on one main surface, a cross-shaped convex portion that can be fitted to the concave portion of the head base on the other main surface, and a thickness from the center portion of the cross shape. A bolt that protrudes in the direction and can be inserted into the through hole of the head base,
The bolt portion is inserted into the through hole from the front side of the head base, and the bolt portion is inserted into the through hole from the back side of the head base in a state where the convex portion is engaged with the concave portion. It is fixed by screwing with the shaped member ,
A first diameter closer to the back side of the through hole is larger than a second diameter closer to the front side, and a step portion is formed at a portion where the diameter of the through hole changes from the first diameter to the second diameter. And a lower end portion of the cap-shaped member inserted into the through hole is in contact with the stepped portion of the through hole and the convex portion of the head portion . The head of the cap-shaped member is flush with the back surface of the head base, and a slit-like depression is provided in the head of the cap-shaped member. Toothbrush. The toothbrush according to claim 1 , wherein the handle portion is inclined to the back side with respect to the main surface of the head portion as the distance from the head portion increases . The toothbrush according to any one of claims 1 to 3, wherein the neck portion bulges to the back side and is formed in a substantially arc shape in a side view . A hook portion that protrudes outward is formed near the center of the back surface of the handle portion, and an end portion on the neck portion side of the hook portion protrudes outward at an angle of approximately 90 ° from the handle portion. The toothbrush according to any one of claims 1 to 4, wherein the toothbrush is provided.

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