JP2020069324A - Angle variable toothbrush - Google Patents

Abstract

To provide an angle variable toothbrush which has a simple structure and a mechanism for washing a depth part of an oral cavity which cannot be easily brushed, while changing or maintaining a bend angle of a brush part.SOLUTION: An angle variable toothbrush comprises: a rod-shaped connection rod member 5 which extends toward a base end in an axial direction from a brush part 2, and is integrated with the brush part; and a slide member 6 which can slide in an axial direction L along a handle part 3. The brush part rotatably pivots to one end part of the handle part, the handle part and the slide member comprise engagement means for engaging the slide member to the handle part at a position where the brush part forms a prescribed bend angle θ1, the connection rod member is configured so that a shaft center and an extension line thereof do not cross a rotation center line C1 of the brush part and a tip end part 5a is attached to the handle part side through the slide member at a position where the brush part forms the prescribed bend angle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a variable angle toothbrush, and more particularly to a variable angle toothbrush capable of adjusting a bending angle of a brush portion with respect to an axial direction of a handle portion.

  Conventionally, as shown in FIG. 15, a brush portion 51 is provided on the tip end side which is one end in the longitudinal direction, and a rod-shaped handle portion 53 is provided on the base end side which is the other end. There is an angle variable toothbrush capable of adjusting the bending angle of the portion 51 (Patent Document 1).

  In the conventional variable angle toothbrush, the brush portion 51 has a flat flocked surface on which a plurality of bristles 51a are flocked, and is bent toward the tip of the brush 51a in the direction perpendicular to the axial direction with respect to the axial direction. To do.

  Further, in the conventional angle variable toothbrush, the brush part 51 has the neck part 52, the base end side end of the neck part 52 is bifurcated, and the tip end side end of the handle part 53 is sandwiched. Then, the first pin 54 penetrates the proximal end of the neck portion 52 and the distal end of the handle portion 53 and is loosely fitted therein, so that the brush portion 51 is pivotally attached to the handle portion 53. ..

  Further, the conventional angle-variable toothbrush includes a slide member 55 that is slidable in the axial direction along the handle portion 53, and the first pin 54 has a sliding groove provided in the axial direction of the handle portion 53. The slide member 55 fitted inside is penetrated.

  At this time, the central axis of the first pin 54 intersects orthogonally with the axial direction and is orthogonal to the perpendicular direction when viewed in the axial direction. Further, since the first pin 54 is inserted into the first elliptical through hole which is opened in the slide member 55 and whose longitudinal direction coincides with the axial direction, the first elliptical through hole has the same shape. It can slide freely in any direction.

  On the other hand, in the conventional variable angle toothbrush, the second pin 56 penetrates the neck portion 52 and the tip end of the slide member 55 and is loosely fitted therein.

  At this time, the central axis of the second pin 56 is orthogonal to the axial direction when viewed in the normal direction and is orthogonal to the vertical direction when viewed in the axial direction. In addition, the second pin 56, which is opened in the neck portion 52, has an elliptical cross section that is inclined toward the tip of the brush 51a as the longitudinal direction is closer to the tip of the brush 51 with respect to the axial direction. It is inserted through the oval through hole.

  Therefore, in the conventional angle variable toothbrush, when the user performs the operation of sliding the slide member 55 in the axial direction, the second pin 56 that moves in the proximal direction along with the slide member 55 is the second pin 56. Since either the wall surface formed by the flat surface on the side close to the tip or the wall surface formed by the flat surface on the side close to the base end of the inner peripheral wall of the oval through hole is pushed, the brush portion 51 causes the brush to move in the axial direction. It is bent toward the tip of 51a or restored in the opposite direction.

  With these mechanisms, the user can bend the variable angle toothbrush by the operation of sliding the slide member 55.

Japanese Utility Model Publication No. 7-30748

  The conventional variable angle toothbrush includes the first pin 54 and the second pin 56 as described above, and these pins 54 and 56 penetrate the neck portion 52, the handle portion 53, etc., and partially. The through hole is formed to have an oval cross section.

  For these reasons, the structure and mechanism involved in manufacturing and assembling parts and adjusting the bending angle are complicated.

  The present invention has been made in view of such problems, and an object thereof is to provide a variable angle toothbrush having a simple structure and mechanism.

(1) In the present invention, a brush portion is provided on the tip end side that is one end in the longitudinal direction, and a rod-shaped handle portion is provided on the base end side that is the other end, and the bending angle of the brush portion with respect to the axial direction of the handle portion. In the variable angle toothbrush capable of adjusting, the brush portion is provided with a rod-shaped connecting rod member formed integrally with the brush portion while extending from the brush portion in the axial direction toward the base end. The shaft part is rotatably attached to one end part of the handle part, and the connecting rod member has neither a shaft center nor an extension line thereof intersecting with a rotation center line of the brush part, and a tip part thereof. The variable angle toothbrush is characterized in that the brush portion is engaged with the handle portion side at a position where the predetermined bending angle is formed.

  That is, since neither the shaft center of the connecting rod member nor the extension line of the shaft center intersects with the rotation center line, the brush portion may be pushed or pulled in the axial direction from the connecting rod member. , Receives a rotational force around the rotation center line for pivotally supporting the handle portion. As a result, in the variable angle toothbrush of the present invention, the brush portion rotates due to displacement of the axial position of the connecting rod member with respect to the handle portion.

  At this time, when the pressing force from the connecting rod member is applied to the brush portion, the brush portion rotates to the side opposite to the extending side of the connecting rod portion with respect to the rotation center line. .. Further, when a force pulling from the connecting rod member is applied to the brush portion, the brush portion rotates with respect to the rotation center line to a side where the connecting rod portion extends.

  By such displacement of the position of the connecting rod member, the brush portion can be rotated and bent around the rotation center line in both forward and reverse directions. Also, after rotating in one direction, it can be rotated in the other direction to restore the original position.

  The connecting rod member engages with the handle portion side after the brush portion rotates, so that the angle variable toothbrush of the present invention has a posture in which the brush portion forms the predetermined bending angle with respect to the axial direction. Can be held. When the variable angle toothbrush of the present invention is moved in the axial direction in a bent state, the user can clean a part of the oral cavity that is difficult to polish.

  Moreover, the connecting rod member is a member that extends from the brush portion and is formed integrally with the brush portion. Therefore, the bending angle of the brush portion can be easily changed or maintained by changing the position of the connecting rod member with respect to the handle portion and fixing it after the change. The structure of the variable angle toothbrush of the present invention is simple, and the mechanism for adjusting the bending angle is simple.

(2) Further, a slide member that is slidable in the axial direction along the handle portion is provided, and the handle portion and the slide member have the slide member at a position where the brush portion forms the predetermined bending angle. The connecting rod member may have locking means for locking the handle portion, and the connecting rod member may be attached to the handle portion side via the slide member.

  That is, by sliding the slide member in the axial direction and locking the slide member in a predetermined position after sliding, the angle variable toothbrush of the present invention forms the predetermined bending angle with respect to the brush portion in the axial direction. And the posture can be maintained. As described above, the variable angle toothbrush of the present invention can adjust the predetermined bending angle with a simple structure and mechanism.

(3) Further, the connecting rod member may have a hinge.

  That is, since the connecting rod member has a hinge, when a force in the axial direction is applied to the brush portion, the hinge is deformed by a required angle, and stress is less likely to be concentrated at other specific places. Therefore, the variable angle toothbrush of the present invention can reduce damage to the brush portion and the connecting rod member during operation even with a simple structure and mechanism.

(4) Further, the brush portion and the connecting rod member may be made of a flexible material.

  That is, since the brush portion and the connecting rod member have flexibility, when a force that pushes or pulls in the axial direction is exerted, the brush portion and the connecting rod member are flexibly deformed, and the stress is less likely to be concentrated in a specific place. Therefore, the variable angle toothbrush of the present invention can reduce damage to the brush portion and the connecting rod member during operation even with a simple structure and mechanism.

(5) Further, the handle portion may have a bearing recess formed integrally with the brush portion and capable of supporting a rotating shaft.

  That is, in the variable angle toothbrush of the present invention, it is not necessary to separately provide the rotating shaft and the bearing member for the handle portion to pivotally support the brush portion, and the brush portion is provided with a simple structure or mechanism. It can be pivotally attached to the handle part.

(6) Further, the brush portion may have a planar flocked surface on which a plurality of brushes are flocked, and may be bent in a direction perpendicular to the flocked surface with respect to the axial direction.

  That is, the variable angle toothbrush of the present invention is bent in the perpendicular direction, so that when the user moves in the axial direction, the plurality of brushes come into contact with the inside of the oral cavity of the user in the axial direction, The inside of the oral cavity can be rubbed and cleaned. For example, it is possible to clean a deep part that is difficult to polish, such as the back of the back teeth of the user.

  As described above, the variable angle toothbrush of the present invention can bend in the perpendicular direction and exhibit a high cleaning force in the oral cavity even with a simple structure and mechanism.

(7) Further, the slide member has an operation surface on a side facing the flocked surface with respect to an axial direction line of the handle portion intersecting the rotation center line, and the operation surface is pushed in the axial direction. The sliding may be possible by being carried.

  That is, the user grips the variable angle toothbrush of the present invention and pushes the operation surface toward the base end in the axial direction, whereby the slide member slides toward the base end. Further, the slide member slides toward the tip by pushing the operation surface toward the tip in the axial direction. By displacing the slide member in the axial direction in this manner, the brush portion can be rotated and bent in both forward and reverse directions.

  At this time, since the plurality of brushes are planted on the flocked surface, the operation surface is in the tip direction of the brush with respect to the axial line. Therefore, the user grips the variable angle toothbrush of the present invention in a way called a palm grip, and holds the variable angle toothbrush of the present invention in a way called with a pencil called a pen grip. The thumb can be applied to the operation surface with the tip of the brush facing forward.

  As a result, the user can press the operation surface with the thumb of one hand while holding the variable angle toothbrush of the present invention with one hand.

  As described above, the user does not need to change the angle-variable toothbrush of the present invention between the time of operating the operation surface with the thumb and the time of cleaning the oral cavity, and further, the operation for bending The operation for cleaning can be performed at the same time. Therefore, the variable angle toothbrush of the present invention can efficiently clean the inside of the oral cavity even with a simple structure and mechanism.

(8) Further, the brush portion may have a planar planting surface on which a plurality of protruding bristles are erected, and may be bent in a substantially perpendicular direction of the planting surface with respect to the axial direction. ..

  In addition to the purpose of rubbing and cleaning the inside of the oral cavity as described above, for example, a toothbrush for applying a liquid dentifrice to a child's tooth is known. In such a toothbrush for application, a plurality of protruding bristles made of, for example, a low impact resilience material are erected on both front and back surfaces.

  Even in such an application, the angle variable toothbrush of the present invention bends in the perpendicular direction, so that when the user moves in the axial direction, the plurality of protruding bristles come into contact with the inside of the oral cavity in the axial direction. The toothpaste can be efficiently applied to the inside of this oral cavity.

  As described above, the variable-angle toothbrush of the present invention can be bent in the perpendicular direction and efficiently apply the medicinal component to the oral cavity even if the toothbrush has a simple structure and mechanism.

  As described above, the variable angle toothbrush of the present invention has a simple structure and mechanism.

(A) It is a front view of the variable angle toothbrush showing the first embodiment of the present invention. (B) Similarly, it is an end view in the front cross section of the variable angle toothbrush. (A) It is a front view of the brush part of the variable angle toothbrush which shows the 1st Embodiment of this invention. (B) It is a plan view of the brush portion. (A) It is a top view of the handle part of the angle variable toothbrush which shows the 1st Embodiment of this invention. (B) Similarly, it is a front view of the handle part. Similarly, it is an enlarged plan view of a handle part. (A) It is a left side view of the slide member of the angle variable toothbrush which shows the 1st Embodiment of this invention. (B) It is a plan view of the slide member. (C) Similarly, it is a front view of the slide member. (D) Similarly, it is a bottom view of the slide member. It is a top view of the angle variable toothbrush which shows the 1st Embodiment of this invention. It is a bottom view of the variable angle toothbrush which shows the 1st Embodiment of this invention. (B) It is an end view in the AA cross section of FIG. 6 of the angle variable toothbrush which shows the 1st Embodiment of this invention. (B) Similarly, it is a front view of the variable angle toothbrush. It is a front view of the angle variable toothbrush which shows the 1st Embodiment of this invention. It is explanatory drawing of the angle variable toothbrush which shows the 1st Embodiment of this invention. It is explanatory drawing of the angle variable toothbrush which shows the 1st Embodiment of this invention. It is a front view of the angle variable toothbrush which shows the 2nd Embodiment of this invention. (A) It is a front view of the brush part of the angle variable toothbrush which shows the 3rd Embodiment of this invention. (B) It is a left side view of a brush part similarly. (A) It is a front view of the brush part of the angle variable toothbrush which shows the 4th Embodiment of this invention. (B) It is a left side view of a brush part similarly. It is explanatory drawing of the conventional angle variable toothbrush.

  1 to 11 illustrate a first embodiment of the present invention. In the figure, 1 is a variable angle toothbrush.

  As shown in the front view of FIG. 1A, the variable angle toothbrush 1 has one end in the longitudinal direction, has a brush portion 2 on the tip end T side which is the left end in the drawing, and has the other end in the longitudinal direction. The rod-shaped handle portion 3 is provided on the base end B side, which is the right end of the drawing. The arrow with the symbol L indicates the axial direction of the handle 3.

As shown in FIG. 1A, the variable angle toothbrush 1 has a plurality of brushes 4 ₁ to 4 _n to be brushed on the brush portion 2. The plurality of brushes 4 ₁ to 4 _n are collectively _denoted by reference numeral 4. The user of the variable angle toothbrush 1 holds the handle portion 3 with one hand and inserts the brush portion 2 into his or her oral cavity to bring the plurality of brushes 4 into contact with the teeth or tongue. In this state, the user reciprocates the handle portion 3 in the substantially axial direction L, or rotates the handle portion 3 around the substantially axial center to clean teeth and tongue.

  In the variable angle toothbrush 1, the handle portion 3 has a pair of brackets 3a, 3a on the tip T side, and the brush portion 2 is rotatably supported by the pair of brackets 3a, 3a. That is, the brush part 2 is rotatably attached to one end of the handle part 3. The rotation center line C1 of the brush portion 2 stands upright in FIGS. As a result, the variable angle toothbrush 1 can adjust the bending angle θ1 of the brush portion 2 with respect to the axial direction L of the handle portion 3.

  FIG. 1 (a) shows a state in which it is not bent. Further, FIG. 1B shows an end view in a front cross section in a state in which the brush portion 2 is bent by rotating 30 degrees in the clockwise direction CL around the rotation center line C1 with respect to the axial direction L and being bent. That is, the bending angle θ1 at this time is 30 degrees.

  At this time, the rotation for bending the brush portion 2 in the clockwise direction CL in the front view as in the state of FIG. 1B is called the forward rotation, and the rotation for bending the counterclockwise UC in the front view is the reverse rotation. Call it. The brush part 2 can rotate in both forward and reverse directions. Therefore, for example, it can be restored to the original position by being rotated clockwise until the bending angle θ1 forms 30 degrees, and then being rotated clockwise until the bending angle θ1 forms 0 degree.

  The variable angle toothbrush 1 includes a rod-shaped connecting rod member 5 that extends from the brush portion 2 in the axial direction L toward the base end B and that is integrally formed with the brush portion 2. Then, after the brush portion 2 is rotated in the forward direction, the tip portion 5a of the connecting rod member 5 is engaged with the handle portion 3 side at a position where the bending angle θ1 is 30 degrees as shown in FIG. The variable toothbrush 1 can maintain the posture in which the bending angle is 30 degrees.

  That is, when the predetermined bending angle θ1 is 30 degrees, the variable angle toothbrush 1 can hold the posture that forms the predetermined bending angle.

  The variable-angle toothbrush 1 also includes a slide member 6 that is slidable in the axial direction L along the handle 3. Accordingly, the connecting rod member 5 can be attached to the handle portion 3 side through the slide member 6 at the tip portion 5a. That is, in the connecting rod member 5, the front end portion 5a is pivotally attached to the end of the slide member 6 on the front end T side, and the slide member 6 is locked to the handle portion 3 by the means described below, so that the handle portion 3 side. Can be laid on.

  As described above, the variable angle toothbrush 1 has a simple structure and a mechanism for adjusting the bending angle θ1 is simple.

  As shown in the front view of FIG. 2A, the brush portion 2 and the connecting rod member 5 are integrally formed so as to be arranged on the left and right sides of the drawing.

  As shown in the plan view of FIG. 2B, a pair of cylindrical rotating shafts 2a and 2a are respectively arranged upward from the brush portion 2 in a vertical direction from a position near the base end B of the variable angle toothbrush 1. And project downward. The pair of rotary shafts 2a, 2a have their axes aligned with each other and are formed integrally with the brush portion 2. The axis of each of the rotating shafts 2a, 2a constitutes the rotation center line C1 of the brush portion 2.

  The brush part 2 has a flocked surface 2b on which a plurality of bristles 4 are flocked on a plane that is upward in a front view as shown in FIG. Then, the brush unit 2 rotates clockwise CL as shown in FIG. That is, the brush portion 2 bends upward with respect to the axial direction L in the direction perpendicular to the flocked surface 2b.

  By thus bending the brush portion 2, when the user moves the variable angle toothbrush 1 in the axial direction L, the plurality of brushes 4 contact the inside of the oral cavity in the axial direction L and rub the inside of the oral cavity for cleaning. can do. For example, it is possible to clean a deep part that is difficult to polish, such as the back of the back teeth of the user. Since the recessed portion such as the back of the back tooth is rubbed with the plurality of brushes 4, the bending angle θ1 is preferably 15 degrees or more and 30 degrees or less. When the angle is less than 15 degrees, it is difficult for the plurality of brushes 4 to reach the recessed portion, and when the angle exceeds 30 degrees, the plurality of brushes 4 are too bent and the variable angle toothbrush 1 is difficult to move.

  As shown in the plan view of FIG. 2 (b), the brush portion 2 has a central portion protruding in the up-down direction with respect to the left-right direction of the drawing in order to widen the space in which a plurality of brushes 4 are planted. It has a shape.

  The connecting rod member 5 has a hinge 7 at one end of the angle variable toothbrush 1 facing the tip T. The connecting rod member 5 has a shape that is opened downward with respect to the brush portion 2 and is sandwiched between the outer wall of the brush portion 2 facing the base end B and the obliquely downward outer wall of the connecting rod member 5. It has a notch in the shape of a triangular prism. The deepest part of this notch forms the valley line 7a. As a result, the connecting rod member 5 is formed with a neck portion whose vertical height becomes smaller toward the tip T, and this neck portion constitutes the hinge 7.

  The connecting rod member 5 has a substantially rectangular cross section, and a top surface 5b of the cube that faces upward in FIG. 2A is formed flush with the flocking surface 2b. The axis C2 formed by the axis of the connecting rod member 5 and its extension line substantially intersects with the valley line 7a of the hinge 7 as shown in the drawing.

  On the other hand, the rotation center line C1 is located below the axis C2 by the distance d1 in the vertical direction of FIG. That is, the rotation center line C1 in the upright direction in the drawing and the axis line C2 in the left-right direction in the drawing are vertically separated from each other and do not intersect with each other. Thus, the connecting rod member 5 is arranged eccentrically with respect to the rotation center line C1. Therefore, while the rotating shafts 2a, 2a are rotatable and are supported so as not to move to the left, right, up and down in the figure, the connecting rod member 5 is displaced in the direction of the axis C2, The brush part 2 can rotate around the rotation center line C1.

  The material of the brush portion 2 and the connecting rod member 5 is polypropylene resin. Since the polypropylene resin is a flexible material that can be easily bent, the brush portion 2 and the connecting rod member 5 are flexibly deformed while maintaining the integrated state, and the hinge 7 is centered on the valley line 7a. Can be bent.

  Moreover, since the hinge 7 is deformed by a required angle, stress is less likely to be concentrated on another specific place.

  The front end portion 5a located at the right end of the connecting rod member 5 in FIG. 2A is formed in a substantially C-shape when viewed from the front and opens upward. The C-shaped portion is rotatably attached to a part of the slide member 6 described later, and the tip portion 5a is axially attached to the slide member 6.

  With the above configuration, when the brush portion 2 rotates forward from the state of FIG. 1A to the state of FIG. 1B, and from the state of FIG. 1B to the state of FIG. Even when the brush portion 2 rotates in the reverse direction, the hinge 7 can be deformed following the relative positional relationship between the brush portion 2 and the connecting rod member 5. Therefore, even when the brush part 2 rotates like this, the brush part 2 and the connecting rod member 5 are not broken and separated. As described above, the variable angle toothbrush 1 can reduce damage to the brush portion 2 and the connecting rod member 5 even with a simple structure and mechanism.

  Further, the brush portion 2 and the rotating shafts 2a, 2a, and the brush portion 2 and the connecting rod member 5 are all integrally formed. For example, polypropylene resin may be molded by an injection molding machine. Therefore, it is not necessary to assemble the brush portion, the rotating shaft, and the connecting rod member separately after processing them separately, and the manufacturing process can be simplified.

  The material of the brush portion 2 and the connecting rod member 5 may be a material having higher flexibility than polypropylene resin such as elastomer. Other than these, the brush portion 2 and the connecting rod member 5 can be flexibly deformed while maintaining the integrated state and can be bent at the hinge 7 around the valley line 7a. A material having lower flexibility than polypropylene resin such as saturated polyester resin may be used as long as it has such a certain flexibility.

  Further, the hinge 7 may not be provided as long as the brush portion 2 and the connecting rod member 5 can be flexibly deformed while maintaining the integrated state and sufficiently deformed by following their relative positional relationship. .. That is, the connecting rod member 5 does not have to have the triangular prism-shaped notch between itself and the brush portion 2. At this time, a material having higher flexibility than polypropylene resin such as elastomer is used.

  As shown in the plan view of FIG. 3A, the handle portion 3 has a pair of upper and lower brackets 3a, 3a in plan view. The brackets 3a, 3a protrude toward the tip T of the variable angle toothbrush 1. Further, as shown in the front view of FIG. 3 (b), each bracket 3a, 3a has a bearing recess 3b, 3b which opens toward the bottom surface.

  The handle portion 3 has a central groove 3c that opens upward. One bracket 3a and its extension edge toward the base end B, and the other bracket 3a and its extension edge toward the base end B form a pair of inner walls facing each other of the central groove 3c.

  As a result, the rotary shaft 2a shown in FIGS. 2A and 2B can be fitted into the bearing recess 3b from below. Since the outer diameter of each rotary shaft 2a is slightly smaller than the inner diameter of each bearing recess 3b, each rotary shaft 2a can freely rotate inside each bearing recess 3b. Further, since the opening portion of each bearing recess 3b is slightly narrowed, each rotating shaft 2a is less likely to fall off the handle portion 3.

  On the other hand, the connecting rod member 5 shown in FIGS. 2A and 2B can be fitted into the central groove 3c from above. Since the width of the connecting rod member 5 in the vertical direction in FIG. 2B is slightly smaller than the width of the central groove 3c, the connecting rod member 5 can freely reciprocate in the vertical direction inside the central groove 3c. ..

  Further, the handle portion 3 has a rectangular parallelepiped shape that is long in the axial direction L on both the outer wall on the front side and the outer wall on the rear side opposite to that shown in FIG. 3B, and faces the front and the back, respectively. It has guide grooves 3d and 3d which are open to. The sliding portion of the slide member 6, which will be described in detail later, can be fitted into these guide grooves 3d, 3d.

  Further, each of the guide grooves 3d, 3d has two locking recesses 3e, 3e, 3e, 3e on the inner wall opposite to the opening side thereof. The locked projections of the slide member 6, which will be described in detail later, are locked by these locking recesses 3e, 3e, 3e, 3e.

  In each of the locking recesses 3e, 3e, 3e, 3e, as shown in the enlarged plan view of FIG. 4, a pair of locking holes 3f, 3f are arranged continuously in the axial direction L, respectively.

  The pair of locking holes 3f, 3f each have a partial arcuate cross section in a plan view, and are arranged such that the centers of the locking holes 3f, 3f form a constant hole pitch d2 in the axial direction L. .. In the illustrated embodiment, the hole pitch d2 is 1.5 mm.

  Further, the two locking recesses 3e, 3e of the one guide groove 3d and the two locking recesses 3e, 3e of the other guide groove 3d are arranged so as to have a constant recess interval d3. That is, the locking holes 3f, 3f on the tip end T side of the variable angle toothbrushes 1 are arranged so as to have a constant recess interval d3. Further, the locking holes 3f, 3f on the base end B side are also arranged with a constant recess interval d3.

  The material of the handle portion 3 is polypropylene resin. Further, a material other than a polypropylene resin such as a saturated polyester resin may be used as long as it has a strength enough to enable these structures and mechanisms.

  As shown in the left side view of FIG. 5A, the slide member 6 has a flat shape in the width direction W in a side view and has a flat operation surface 6a facing upward. The user can move the slide member 6 in the axial direction L with respect to the handle portion 3 by applying the fingers of the hand holding the variable angle toothbrush 1 to the operation surface 6a and pushing in the axial direction L.

  The slide member 6 has a pair of side surface portions 6b, 6b each having a shape that hangs downward from both ends in the width direction W, and a slide portion 6c protruding from the lower ends of the respective side surface portions 6b, 6b so as to face each other. , 6c.

  The slide member 6 is attached so as to cover from above the handle portion 3 shown in the front view of FIG. At this time, in the plan view of FIG. 5B, the front view of FIG. 5C, and the bottom view of FIG. 5D, the left direction is the tip T direction of the variable angle toothbrush 1, and the right direction is the variable angle toothbrush 1. It is attached so as to face the base end B. As a result, the slide member 6 is the side on which the flocked surface 2b faces the axial line C3 that is a straight line in the axial direction L that intersects the rotation center line C1 of the handle portion 3 illustrated in FIG. The operation surface 6a is provided on the upper side of the front view.

  When the slide member 6 is attached to the handle portion 3, the sliding portions 6c and 6c fit into the guide grooves 3d and 3d. At this time, the side surface portions 6b and 6b are elastically deformed and spread outward in the width direction W so that the sliding portions 6c and 6c can straddle the handle portion 3. Further, the handle portion 3 is provided with step portions 3g and 3g as shown in FIG. 4 so that the sliding portions 6c and 6c can easily straddle the handle portion 3. Then, since the side surface portions 6b, 6b are widened and the slide member 6 is attached, the sliding portions 6c, 6c are pressed against the respective side surface portions 6b, 6b toward the bottom of the corresponding guide grooves 3d, 3d. The force to try is urged.

  The height of the sliding portions 6c, 6c in front view is slightly smaller than the height of the guide grooves 3d, 3d in front view. Therefore, when the slide member 6 is attached to the handle portion 3, the sliding portions 6c and 6c can freely slide along the corresponding guide grooves 3d and 3d.

  The material of the slide member 6 is polypropylene resin. Further, a material other than a polypropylene resin such as a saturated polyester resin may be used as long as it has a strength enough to enable these structures and mechanisms.

  Each of the sliding portions 6c, 6c has four locked protrusions 6d, 6d, 6d, 6d that project in the direction in which the sliding portions 6c face each other as shown in FIG. 5 (d). The locked projections 6d, 6d of the one sliding portion 6c, 6c and the locked projections 6d, 6d of the other sliding portion 6c, 6c are spaced apart from each other by a recess interval d3 in plan view. Placed

  Each of the locked protrusions 6d, 6d, 6d, 6d has a partial arcuate cross section that bulges in a direction in which the sliding portions 6c face each other in a plan view. As described above, since the locking holes 3f, 3f are arranged with the recess space d3 therebetween, the locking recesses 3e, 3e, 3e, 3e in the state where the slide member 6 is attached to the handle portion 3 are provided. Can be simultaneously fitted in the respective locking holes 3f, 3f, 3f, 3f on the side of the tip T. Alternatively, the engaging recesses 3e, 3e, 3e, 3e can be simultaneously fitted into the engaging holes 3f, 3f, 3f, 3f on the base end B side.

  The state in which the locked projections 6d, 6d, 6d, 6d described above are fitted into the locking holes 3f, 3f, 3f, 3f on the tip T side is called the tip T side locked state, and the base end B The state of being fitted into each side locking hole 3f, 3f, 3f, 3f is referred to as the proximal end B side locking state. The locking recess 3e, the locking hole 3f, and the locked projection 6d are collectively referred to as locking means S.

  As a result, the slide member 6 is configured such that when the user pushes the operation surface 6a in the axial direction L, for example, the sliding portions 6c and 6c acting by the urging force and the guide grooves 3d and 3d corresponding to the sliding portions 6c and 6c, respectively. It is possible to move it against the frictional force between them, and it is possible to lock the handle member 3 by the locking means S so as to remain in the distal end T side locked state or the proximal end B side locked state. It is possible. Further, the user may not only press the operation surface 6a but also pinch the other portion of the slide member 6 to move it in the axial direction L.

  The slide member 6 has a connecting rod member support portion 6e that projects in the direction of the tip T of the variable angle toothbrush 1 and that has an inverted U-shape in plan view or bottom view.

  The connecting rod member support portion 6e has a support shaft 6f having a substantially columnar shape in the width direction W. The rotating shaft 2a of the brush portion 2 fits in the bearing recess 3b of the handle portion 3, the connecting rod member 5 fits in the central groove 3 of the handle portion 3, and the tip 5a of the connecting rod member 5 is The C-shaped portion is fitted so as to wind around the support shaft 6f, and is axially attached to the connecting rod member support portion 6e. At this time, since the center line of the C-shaped portion and the center line of the support shaft 6f coincide with each other, the tip portion 5a is rotatably supported by the connecting rod member support portion 6e.

  By these, the connecting rod member 5 is pivotally attached to the slide member 6. Further, the connecting rod member 5 is rotatably connected to the slide member 6. Therefore, the slide member 6 moves in the axial direction L with respect to the handle member 3, and the angle of the connecting rod member 5 that connects as shown in FIGS. 1A and 1B with respect to the slide member 6 changes. Also, the connecting rod member 5 can maintain the connected state with the slide member 6.

  The slide member 6 may have a plurality of grooves on the operation surface 6a in a direction orthogonal to the axial direction L so that the user can easily push in the axial direction L.

  With the above configuration, the connecting rod member 5 is attached to the handle portion 3 side via the slide member 6. That is, the slide member 6 is locked to the handle member 3 so as to remain in the front end T side locked state or the base end B side locked state, and the connecting rod member 5 maintains the connected state with the slide member 6, The connecting member 5 is attached to the handle portion 3 side via the slide member 6 so as to remain in the front end T side locked state or the base end B side locked state.

  If the connecting rod member 5 can remain in the respective locking states corresponding to the tip end T side locking state and the base end B side locking state with respect to the handle portion 3, without interposing the slide member 6, You may directly attach to the handle part 3.

  For example, a position where the tip of the connecting rod member 5 has a locked claw and the central groove 3c of the handle portion 3 has a locking claw so that the connecting rod member 5 can remain in the locked state. The locking claws and the locked claws may be arranged in the. Thus, when the locking claw is locked by the locked claw, the connecting rod member 5 can be directly attached to the handle portion 3.

  FIG. 6 is a plan view showing a state in which the brush portion 2, the connecting rod member 5, and the slide member 6 are attached to the handle portion 3. FIG. 7 also shows a bottom view. Further, FIG. 8A shows an end view in the front cross section of the cross section indicated by the symbol AA in FIG.

  6 to 8, the slide member 6 is locked by the handle portion 3 in the front end T side locked state. That is, the locked projections 6d, 6d, 6d, 6d of the slide member 6 are locked in a state of being fitted in the locking holes 3f, 3f, 3f, 3f on the tip T side.

  Then, in this state, the brush portion 2 is not bent in the axial direction L, and the angle formed by the flocked surface 2b with respect to the axial direction L is 0 degree. That is, the hinge 7 is not bent, and neither the brush portion 2 nor the connecting rod member 5 is deformed. Furthermore, the bristling surface 2b of the brush portion 2 and the top surface 5b of the connecting rod member 5 are still in a state of being formed flush with each other.

  In this way, the brush portion 2 axially determines the relative position between the locked projections 6d, 6d, 6d, 6d of the slide member 6 and the locking holes 3f, 3f, 3f, 3f on the tip T side. If the angle variable toothbrush 1 is set to a position where it is not bent with respect to L, the angle variable toothbrush 1 can maintain the unbent posture.

  The distance r between the rotation center line C1 and the valley line 7a in plan view shown in FIG. 8A is 3.77 mm. Further, in the locked state on the tip end T side, the distance between the rotation center line C1 and the tip end portion 5a is 37.1 mm, and the radius r connecting the rotation center line C1 and the valley line 7a with respect to the axial direction L is formed. The angle θ2 is 58 degrees.

  Next, FIG. 9 shows a state in which the slide member 6 has moved in the axial direction L toward the base end B from the state of FIG. 8A. For example, the user can move the slide member 6 by pressing the finger against the operation surface 6a and shifting the finger toward the base end B while the frictional force between the operation surface 6a and the finger is being generated. ..

  At this time, each of the locked projections 6d, 6d, 6d, 6d is released from the state of being fitted to the tip end T side against the biasing force and is moved toward the base end B in the axial direction L, The engaging recesses 3e, 3e, 3e, 3e are fitted into the engaging holes 3f, 3f, 3f, 3f on the base end B side. As a result, the slide member 6 moves toward the base end B in the axial direction L, and is then locked by the handle portion 3 in the base end B side locking state.

  FIG. 8B is a view showing the hole pitch d2 shown in FIG. 4 in a front view of the variable angle toothbrush 1.

  Therefore, when the base end B side locked state of FIG. 9 is reached, the slide member 6 moves 1.5 mm toward the base end B in the axial direction L as compared with the distal end T side locked state. Further, the connecting rod member 5 that is still connected to the slide member 6 also follows the slide member 6 and moves toward the base end B. However, since the connecting rod member 5 is slightly inclined with respect to the axial direction L as compared with the locking state on the tip end T side, the moving distance is smaller than 1.5 mm.

  At this time, the rotation center line C1 and the axial center line C2 formed by the axial center of the connecting rod member 5 and an extension thereof are vertically separated from each other and do not intersect each other, and the connecting rod member 5 is an axial line. Since it extends above C3 in the drawing, the brush portion 2 receives a pulling force from the connecting rod member 5 toward the proximal end B, and receives a rotational force of clockwise CL in the drawing around the rotation center line C1. In this way, the position of the connecting rod member 5 with respect to the handle portion 3 in the axial direction L changes, so that the brush portion 2 rotates in the forward direction.

  As a result, the hinge 7 is deformed so that the brush portion 2 can hold its head while keeping the distance r between the rotation center line C1 and the valley line 7a, which is 3.77 mm, and the radius r with respect to the axial direction L is The formed angle θ3 changes to 28 degrees. That is, the brush portion 2 rotates 30 degrees forward as compared with the locked state at the tip T side. Further, since the angle formed by the flocked surface 2b of the brush portion 2 with respect to the axial direction L in the front end T side locked state is 0 degree, the flocked surface 2b moves in the axial direction L in the base end B side locked state. With respect to clockwise, the CL is displaced to a position forming 30 degrees.

  Contrary to these, in order to restore the original state as shown in FIG. 8 (a) from the state in which the head of the brush portion 2 is slid as shown in FIG. 9, the user presses his / her finger on the operation surface 6a and The slide member 6 can be moved by shifting the fingers in the T direction. Alternatively, another portion of the slide member 6 may be grasped and moved.

  At this time, each of the locked projections 6d, 6d, 6d, 6d is released from the state of being fitted to the base end B side against the biasing force and moved toward the tip T in the axial direction L, and then each The engaging recesses 3e, 3e, 3e, 3e are fitted in the engaging holes 3f, 3f, 3f, 3f on the tip T side. As a result, after the slide member 6 moves toward the tip T in the axial direction L, it is locked by the handle portion 3 in the original locking state on the tip T side.

  Then, by returning to the locking state on the tip end T side in FIG. 8A, the slide member 6 moves a distance of 1.5 mm, which is the hole pitch d2, in the axial direction L as compared with the locking state on the base end B side. Move in the direction. Further, the connecting rod member 5 that is still connected to the slide member 6 also follows the slide member 6 and moves toward the tip T.

  At this time, the rotation center line C1 and the axial center line C2 are vertically separated from each other and do not intersect with each other, and the connecting rod member 5 extends above the axial direction line C3 in the figure. , A force pushing from the connecting rod member 5 toward the tip T, and a counterclockwise UC rotational force around the rotation center line C1 in the figure. In this way, the position of the connecting rod member 5 with respect to the handle portion 3 in the axial direction L is changed, whereby the brush portion 2 is rotated in the reverse direction.

  As a result, the hinge 7 is deformed so that the brush portion 2 lays its head while keeping the distance r between the rotation center line C1 and the valley line 7a, which is 3.77 mm, and the angle formed by the radius r with respect to the axial direction L. Changes to 58 degrees. That is, the brush portion 2 rotates 30 degrees in the reverse direction compared to the locked state at the base end B side. Then, the flocked surface 2b of the brush portion 2 and the top surface 5b of the connecting rod member 5 are restored to the original state of being flush with each other.

  In any of the distal end T side locked state and the proximal end B side locked state as described above, the urging force is applied to the user to move the slide member 6 in the axial direction L. Unless a force that resists is applied, the locked protrusions 6d, 6d, 6d, 6d will not be pulled out from the locking holes 3f, 3f, 3f, 3f. Therefore, when the sliding member 6 is not moved, the variable angle toothbrush 1 has a posture in which the brush portion 2 is not bent with respect to the axial direction L, or a posture in which the brush portion 2 is bent at a predetermined angle, for example, It is possible to hold any of the postures that make an angle of 30 degrees with the clockwise CL.

  As described above, the variable angle toothbrush 1 has a simple structure and a simple mechanism for adjusting the bending angle.

  FIG. 10 shows a state in which the user holds the variable angle toothbrush 1 in a manner called a palm grip. At this time, the user's thumb F1 contacts the operation surface 6a. The index finger F2 of the user comes into contact with the bottom surface of the handle portion 3. The bottom surface of the handle portion 3 is located on the opposite side of the operation surface 6a with respect to the axial line C3 of the handle portion 3.

  FIG. 11 shows a state in which the user holds the variable angle toothbrush 1 in the manner of holding a pencil called a pen grip. At this time, the user's thumb F1 contacts the operation surface 6a. The index finger F2 of the user comes into contact with the bottom surface of the handle portion 3.

  When the user grips the variable angle toothbrush 1 by either holding the palm grip or the pen grip, the brush portion 2 bends in the direction perpendicular to the flocked surface 2b as shown in these figures, so that the user can When the variable angle toothbrush 1 is moved in the axial direction L, the plurality of brushes 4 come into contact with the inside of the oral cavity of the user in the axial direction L, and the inside of the oral cavity can be rubbed for cleaning. For example, it is possible to clean a deep place that is difficult to polish, such as the back of the back teeth of the user.

Further, since the slide member 6 has the operation surface 6a on the side where the flocked surface 2b faces with respect to the axial line C3 of the handle portion 3, the user can hold the variable angle toothbrush 1 by either holding the palm grip or the pen grip. Even when gripping, the thumb F1 can be applied to the operation surface 6a with the tips of the brushes 4 ₁ to 4 _n facing toward the front in FIGS. 10 and 11.

  At this time, the user can push the operation surface 6a in the axial direction L with the thumb F1 of one hand while holding the variable angle toothbrush 1 with one hand.

  As a result, the user does not need to hold the variable angle toothbrush 1 between the time when the operation surface 6a is operated with the thumb F1 and the time when cleaning the inside of the oral cavity, and the operation for bending and the cleaning operation are not required. Can be performed at the same time. As described above, the variable angle toothbrush 1 can efficiently clean the inside of the oral cavity even with a simple structure and mechanism.

  FIG. 12 illustrates a second embodiment of the present invention. In the figure, 11 is a variable angle toothbrush. FIG. 12 shows an end view in a front cross section in a state opposite to that of FIG. 9 in a state where the slide member 16 moves in the axial direction L toward the tip T in the state of FIG. 8A. For example, the user can move the slide member 16 by pressing a finger against the operation surface 16a and shifting the finger toward the tip T while generating a frictional force between the operation surface 16a and the finger. When the slide member 16 moves toward the tip T in the axial direction L, the connecting rod member 15 connected to the slide member 16 also moves toward the tip T in the axial direction L.

  At this time, the rotation center line C1 and the axis C2 of the connecting rod member 15 formed by the axis and the extension of the connecting rod member 15 are vertically separated from each other and do not intersect with each other, and the connecting rod member 15 has an axis. Since the brush portion 12 extends above the direction line C3 in the drawing, the brush portion 12 receives a pushing force from the connecting rod member 15 in the direction of the tip T, and a rotational force of the counterclockwise direction UC around the rotation center line C1. .. Therefore, the hinge 17 is deformed with the valley line 17a inward, and the brush portion 12 rotates in the reverse direction to bend the neck downward in the drawing. In the example of this embodiment, the reverse bending angle θ4, which is the counterclockwise angle with respect to the axial direction L, reaches 30 degrees.

  As described above, the variable angle toothbrush 11 has a simple structure and a mechanism for adjusting the reverse bending angle is simple.

  When the user moves the variable angle toothbrush 11 in the axial direction L, the plurality of brushes 14 come into contact with the inside of the oral cavity in the axial direction L and rub the inside of the oral cavity when the user moves the variable angle toothbrush 11 in the axial direction L. Can be cleaned. For example, an occlusal surface of a user's molars, a deep recessed portion that is difficult to brush, or a side surface of some teeth where the brush portion 12 is warped is more likely to hit a plurality of brushes 14 is cleaned. be able to. Since these portions are rubbed by the plurality of brushes 14, the reverse bending angle θ4 is preferably 15 degrees or more and 30 degrees or less. When the angle is less than 15 degrees, it is difficult for the plurality of brushes 14 to reach the recessed portion, and when the angle is more than 30 degrees, the plurality of brushes 14 are excessively bent and it is difficult to move the variable angle toothbrush 11.

  Similar to the first embodiment, the state in which the locked projections 16d, 16d, 16d, 16d are fitted in the locking holes 13f, 13f, 13f, 13f on the tip T side is referred to as the tip T side locking state. The state of being fitted into the respective locking holes 13f, 13f, 13f, 13f on the base end B side is called the base end B side locking state. However, in the present embodiment, the brush portion 12 is reversely bent in the axial direction L in the distal end T side locked state, and the brush portion 12 is bent in the axial direction L in the proximal end B side locked state. Alternatively, the locking means S is arranged so as not to reverse bend. In the locked state on the base end B side, the flocked surface 12b of the brush portion 12 and the top surface 15b of the connecting rod member 15 are flush with each other.

  Other configurations are common to the first embodiment.

  13A and 13B illustrate the third embodiment of the present invention. In the drawing, 22 is a brush portion of the angle variable toothbrush 21. As shown in the front view of FIG. 13A, the brush portion 22 is integrally formed with the connecting rod member 25 so as to be arranged on the left and right sides of the drawing.

  As shown in FIGS. 13A and 13B, the brush portion 22 is formed in a cylindrical shape that is long in the axial direction L. Further, the brush portion 22 has a curved flocked curved surface 22c on the entire circumference of the columnar shape from the tip T in the axial direction L to the vicinity of the rotary shafts 22a, 22a. The plurality of brushes 24 are planted on the curved surface 22c. As a result, as shown in the left side surface of FIG. 13B, the plurality of brushes 24 are planted in a ring shape when viewed from the tip T.

  Then, as in the first embodiment, the brush portion 22 rotates in the clockwise direction CL and the counterclockwise direction UC about the rotation center line C1 that is the axial center line of each of the rotation shafts 22a, 22a, and in the axial direction L. Bend against.

  Other configurations are common to the first embodiment.

  As a result, the variable-angle toothbrush 21 has a simple structure and a simple mechanism for adjusting the bending angle, but a wide range of the oral cavity due to the plurality of brushes 24 planted around the entire circumference of the brush portion 22. Can be cleaned efficiently.

  14A and 14B illustrate the fourth embodiment of the present invention. In the figure, reference numeral 32 is a brush portion of the variable angle toothbrush 31. As shown in the front view of FIG. 14A, the brush portion 32 is integrally formed with the connecting rod member 35 so as to be arranged on the left and right sides of the drawing.

  As shown in FIGS. 14A and 14B, the brush portion 32 is formed in a rectangular parallelepiped shape that is long in the axial direction L. In addition, the brush portion 32 extends from the tip end T in the axial direction L to the vicinity of the rotary shafts 32a, 32a, and the upward planting surface 32d, which is a flat surface in the front view in which a plurality of projecting bristles 38 are erected, and the front view downward. Has a planting surface 32d facing downward.

  Each of the plurality of protruding hairs 38 is formed in a columnar shape with each tip rounded into a hemispherical shape. Since the plurality of protruding bristles 38 are mainly used in a toothbrush for applying a liquid dentifrice to a child's tooth, the plurality of protruding bristles 38 are used for rubbing and cleaning the inside of the oral cavity exemplified in the first to third embodiments. It does not have to be formed as long as the brushes 4, 14, 24.

  Further, the plurality of protruding hairs 38 are formed by using a low impact resilience material such as elastomer or silicone rubber so as not to damage the teeth and gums of the child. At this time, the skin portion of the brush portion 32 and the plurality of protruding bristles 38 may be integrally formed by using these low impact resilience materials, while the core portion of the brush portion 32 may be formed by a synthetic resin such as polypropylene. ..

  Then, as in the first embodiment, the brush portion 32 rotates in the clockwise direction CL and the counterstatistical direction UC about the rotation center line C1 that is the axis of the respective rotation shafts 32a, 32a, and in the axial direction L. On the other hand, each of the planting surfaces 32d, 32d is bent in the perpendicular direction. The brush portion 32 can be rotated in the clockwise direction CL and bent, and then can be rotated in the counterclockwise direction UC in the reverse direction to return to the original posture.

  Other configurations are common to the first embodiment.

  In this way, the variable angle toothbrush 31 of the present embodiment is bent in the perpendicular direction, so that when the user moves in the axial direction L, the plurality of projecting bristles 38 contact the inside of the oral cavity in the axial direction L, A dentifrice can be efficiently applied to the inside of this oral cavity. Further, even when cleaning the inside of the oral cavity with the plurality of protruding hairs 38, by bending in the perpendicular direction, the user can clean the part of the oral cavity that is difficult to polish.

  Therefore, the angle-variable toothbrush 31 has a simple structure and mechanism, bends in the perpendicular direction, can efficiently apply the medicinal component in the oral cavity, and can clean deep places that are difficult to polish. it can.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention.

  For example, when the brush parts 2, 12, 22, 32 are pivotally attached to the handle parts 3, 13, the handle part 3, 13 side has a rotating shaft, and the brush part 2, 12, 22, 32 side has a bearing part. May be.

  The connecting rod members 5, 15, 25, 35 do not have to be fitted in the central groove 3c from above, for example, outside the handle parts 3, 13 from the brush parts 2, 12, 22, 32 in the axial direction L. May be extended toward the base end B along.

  Further, the connecting rod members 5, 15, 25, 35 extend in the direction of the base end B from the brush portions 2, 12, 22, 32 above the rotary shafts 2a, 12a, 22a, 32a in FIG. 2 (a). Not only that, it may be extended in the direction of the base end B from the brush portions 2, 12, 22, 32 below the rotary shafts 2a, 12a, 22a, 32a. At this time, the connecting rod members 5, 15, 25, and 35 extend, for example, through slits provided in the handle portions 3 and 13 in the axial direction L, so that the distal end portion 5a connects the slide members 6 and 16. It suffices to reach the rod member supporting portion 6e.

  The notches of the hinges 7, 17, 27, 37 of the connecting rod members 5, 15, 25, 35 do not have to be triangular prisms, as long as they are deformed according to the rotation of the brush portions 2, 12, 22, 32. For example, it may have an inverted U shape. Alternatively, the notch may open not only downward in FIG. 2A but also upward. Further, the openings may be open in both upward and downward directions.

  Not only the tip 5a of the connecting rod members 5, 15, 25, 35 winds around the support shaft 6f of the slide members 6, 16, but also the connecting rod members 5, 15, 25, 35 with respect to the slide members 6, 16. As long as they are rotatably connected, for example, a structure in which a part of the connecting rod member supporting portion 6e is wound around the tip portion 5a may be reversed.

  The distance r between the rotation center line C1 and the valley lines 7a and 17a, the distance between the rotation center line C1 and the tip portion 5a, and the hole pitch 2 are not limited to the dimensions shown in the illustrated embodiment. The connecting rod members 5, 15, 25, 35 are attached to the handle parts 3, 13 so that the brush parts 2, 12, 22, 32 rotate to a predetermined bending angle and the predetermined bending angle is maintained. Other dimensions may be used if possible.

  The slide members 6 and 16 do not have to be rectangular in a plan view as shown in FIG. 5B, and may have a shape such as a circle, an ellipse, or an ellipse if the user can operate them with fingers. It may be.

  The locking means S is not limited to the locking recesses 3e, the locking holes 3f, and the locked projections 6d in the number and arrangement as in the illustrated embodiment, but may be in the front end T side locked state and the base end B side. Different numbers and arrangements may be used as long as the locked states can be maintained. Further, the relationship between the holes and the protrusions may be reversed between the handle portions 3 and 13 and the slide members 6 and 16.

  In addition, the locking means S has only two positions, that is, the state in which the brush portions 2, 12, 22, 32 are not bent or reverse-bent with respect to the axial direction L and the state in which the bending angle θ1 or the reverse bending angle θ4 is bent. In addition to these positions, for example, in the case where the bending angle θ1 or the reverse bending angle θ4 is 30 degrees, the position in the bending or reverse bending state having an intermediate value such as 22.5 degrees is also used. It may be configured to be locked. Since the variable angle toothbrushes 1, 11, 21, 31 of the present invention have a simple structure and mechanism, they can be locked at positions of intermediate bending or reverse bending simply by increasing the number of locking holes 3f. To do.

  In the first embodiment, the case where the brush portion 2 is bent in the clockwise direction CL in the drawing is shown, and in the second embodiment, the case where the brush portion 12 is bent backward in the counterclockwise direction UC is shown. The variable angle toothbrush may be configured such that one variable angle toothbrush can perform both the clockwise CL bending and the counterclockwise UC reverse bending. At this time, from the state before bending, the slide member moves toward the base end B as in the first embodiment during bending, and the slide member moves toward the tip T as in the second embodiment during reverse bending as in the second embodiment. It should have a structure that allows it to move.

  Since one angle variable toothbrush performs both bending and reverse bending, the user can easily use bending and reverse bending properly depending on the position and orientation of the tooth to be rubbed. As described above, the variable-angle toothbrush of the present invention can exert a high cleaning force in the oral cavity even with a simple structure and mechanism.

  INDUSTRIAL APPLICATION This invention can be utilized for the angle variable toothbrush which can adjust the bending angle of the brush part with respect to the axial direction of a handle part.

1, 11, 21, 31 Angle variable toothbrushes 2, 12, 22, 32 Brush parts 2a, 12a, 22a, 32a Rotating shafts 2b, 12b, 22b Flocking surface 22c Flocking curved surface 32d Planting surface 3,13 Handle part 3a Bracket 3b Bearing recess 3c Central groove 3d Guide groove 3e Locking recess 3f, 13f Locking hole 3g Steps 4, 14, 24 Plural brushes 5, 15, 25, 35 Connecting rod member 5a Tip 5b, 15b Top surface 6, 16 Sliding members 6a, 16a Operation surface 6b Side surface portion 6c Sliding portions 6d, 16d Locked protrusion 6e Connecting rod member supporting portion 6f Support shafts 7, 17, 27, 37 Hinge 7a, 17a Valley line 38 Plural protruding hairs

Claims (8)

It is possible to adjust the bending angle of the brush part with respect to the axial direction of the handle part by providing a brush part on the tip end side which is one end in the longitudinal direction and a rod-like handle part on the base end side which is the other end. In variable angle toothbrush,
While extending in the base end direction along the axial direction from the brush portion, a rod-shaped connecting rod member integrally formed with the brush portion,
The brush portion is rotatably attached to one end of the handle portion,
In the connecting rod member, neither the shaft center nor an extension line thereof intersects with the rotation center line of the brush portion, and the tip portion is the handle portion at a position where the brush portion makes the predetermined bending angle. A variable-angle toothbrush that is attached to the side. A slide member slidable in the axial direction along the handle portion,
The handle part and the slide member have locking means for locking the slide member to the handle part at a position where the brush part forms the predetermined bending angle,
The variable angle toothbrush according to claim 1, wherein the connecting rod member is attached to the handle portion side via the slide member. The variable angle toothbrush according to claim 2, wherein the connecting rod member has a hinge. The variable angle toothbrush according to claim 2 or 3, wherein the brush portion and the connecting rod member are made of a flexible material. The variable angle toothbrush according to any one of claims 2 to 4, wherein the handle portion has a bearing recess formed integrally with the brush portion and capable of supporting a rotating shaft. The brush part has a planar flocked surface on which a plurality of brushes are flocked, and is bent in a direction substantially perpendicular to the flocked surface with respect to the axial direction. A variable angle toothbrush according to Crab. The slide member has an operation surface on a side facing the flocked surface with respect to an axial line of the handle portion that intersects with the rotation center line, and the slide surface is pushed by the operation surface in the axial direction. The variable angle toothbrush according to claim 6, wherein the variable angle toothbrush is movable. The brush portion has a planar planting surface on which a plurality of protruding bristles are erected, and is bent in a direction substantially perpendicular to the planting surface with respect to the axial direction. 5. The variable angle toothbrush according to any one of 1 to 5.