JPH07308222A - Toothbrush - Google Patents

Abstract

PURPOSE:To efficiently brush the upper and lower rows of teeth evenly without involving any difficulty via the use of a single toothbrush, and provide a toothbrush having a head flexible back and forth and capable of inclination, with a brushing posture held firmly and the muscle fatigue of arms or fingers reduced during a brushing process. CONSTITUTION:A toothbrush has a handle 1 with a shaft 3 connected rotatably within the range of a constant flexible angle back and forth. Also, a head 2 is connected to the handle 1 via the shaft 3, and fixed to both turning ends of the shaft 3 or at the preset angle. Furthermore, the shaft 3 is connected to a lever shaft 8b and an operation lever 11 via a joint lever 8 connected to the shaft 3 and a floating lever 12 exposed to the spring force of a spring 14. For an operation to turn and fix the shaft 3, a thumb is used to operate the lever 11 laid on the external surface of the handle 1 and having such shape as suitable for being held with fingers or the contact of a finger. The lever shaft 8b is thereby guided slidably into a lever shaft slide groove 10 and locked in coupling holes 10a and 10b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dentifrice brush.

[0002] In a brush for tooth brushing, a brush neck portion is continuously provided on a gripping stem, and the body hair of an animal having a certain hardness and a certain bristle length or synthetic resin bristles is vertically hung down in a fixed direction. Conventionally, it is intended to optimize the brushing effect for maintaining the health of teeth, and various modifications have been devised in the connecting portion between the gripping stem and the brush neck. The present invention relates to a brush for toothpaste.

[0003]

2. Description of the Related Art As a conventional technique for optimizing the brushing effect for maintaining the health of teeth, the one in which the handle rod connecting the grip stem of the tooth brush and the brush neck is linear, that is, In addition to the so-called straight type, it is well known or well known that the handle rod is continuously provided with an angle of either forward or backward bending, or the grip stem and the brush neck portion are continuously provided by an arc-shaped handle rod.

As for the shape of the gripping stem, however, almost no technology has been found in consideration of ergonomic ease of use during brushing, reduction of muscle fatigue, brushing effect, etc., and it has a simple rod-like shape. Or, it is no exaggeration to say that they are all aesthetically pleasing.

[0005]

Among the above-mentioned conventional toothpaste brushes, the one in which the handle rod connecting the gripping stem of the toothbrush brush and the brush neck is linear, that is, the so-called straight type brush has upper and lower teeth. The surface of the row and the side surface of the molars are relatively easy to polish, but there are some difficulties in the back surface of the lower row of teeth and the brushing of the molars, and the brushing is neither good nor bad. If the brush neck is bent forward, that is, the so-called reach type, the lower dentition back surface, upper and lower dentition molars,
And the area around it is easy to polish, but the back of the upper dentition is relatively hard to polish.

Further, in the case where the brush neck portion is bent backward, that is, the so-called reverse reach type, the upper dentition back surface and the upper dentition molars are easy to brush, while the lower dentition back surface and the upper and lower molar back surfaces and side surfaces. There is a problem in brushing.

As described above, the conventional technique has a problem that even if a certain portion of the dentition is structured to be easily polished, a dentition portion which is hard to be brushed is inevitably generated on the other hand. It was

[0008] Also, during brushing, the gripping trunk becomes slippery due to saliva, toothpaste paste, water, etc., and unexpected fatigue occurs in the gripping fingers and arm muscles due to the dentition to be brushed, brushing time, etc. There are also many.

In view of the above problems, the present invention is capable of uniformly and efficiently brushing the upper and lower tooth rows without difficulty by using a single tooth brush.
An object of the present invention is to provide a toothbrush having a tilted brush neck, which maintains a firm brushing posture and lessens muscle fatigue of fingers and arms during brushing.

[0010]

According to the present invention, there is provided a toothbrush in which a brush neck is continuously provided on a gripping stem, and a handle rod is provided between the brush neck and the gripping part. The handle rod end is rotatably pivoted within a fixed angle of forward and backward flexion, brush neck fixing means is provided at both rotary ends or at a predetermined angle, and it is clamped at the center of the front surface of the brush, which is the brush bristling side. The formation of the protrusions conforming to the inter-finger shape or the finger surface shape is the means for solving the above problems.

Further, in the present invention, as a means for solving such a problem, the main part of the constant angle rotation operation means of the handle rod is internally provided in the grip trunk, and the handle rod constant angle rotation operation means is provided with the handle. A connecting rod pivotally attached to a pivot ring edge formed on the rod end;
A free-running rod connected to the connecting rod, a shaft core that slidably supports and guides the free-running rod, and a free-moving rod that is inserted in the shaft core and is interposed between the bottom of the grasping trunk lumen and the free-running rod. It is composed of
The operation lever projecting from the freeing rod is configured such that the gripping trunk exposed portion is a protrusion that conforms to the shape of the gripping fingers or the shape of the finger surface, and is guided in a sliding guide groove formed in the gripping trunk. In addition, the brush neck fixing means is provided on the stopper piece formed on the pivot ring of the handle rod end, and on the bottom of the handle rod pivot portion pivot connection groove of the gripping stem, with an appropriate thickness in the front-back direction of the brush. And a mooring hole provided at both ends of the sliding guide groove, and the brush neck is removable from the handle rod end.

[0012]

With the above construction, since the brush neck is rotated within a fixed angle of forward and backward flexion and the brush neck is freely fixed at both pivot ends or at a predetermined angle, for example, by bending the brush neck forward and fixing it. , The back of the lower dentition, the upper and lower dentition molars, and a brush form for brushing, which is suitable for brushing the periphery of the lower dentition. A dentifrice brush form suitable for brushing a molar appears from time to time with a single dentifrice brush.

Regarding the forward / backward bending operation of the brush neck, an operating lever protruding from the freeing rod is operated to slide a sliding guide groove formed in the grip trunk. As a result, the sliding movement of the floating rod, which is slidably supported and guided by the shaft center, is transmitted to the hinge edge portion of the handle rod end portion through the connecting rod, and the brush neck portion flexes back and forth.

At a constant angle of forward and backward bending of the brush neck,
In the brush neck, the stopper piece formed on the pivot ring at the end of the handle rod is brought into contact with the stopper piece rotation stopping member having an appropriate thickness formed on the bottom of the groove for pivot connection of the handle rod pivot portion of the gripping stem, and the stopper By properly adjusting and forming the distance between the pieces and the thickness of the stopper piece rotation stopping member, the forward and backward bending over a certain angle can be prevented.

At this time, if the operation lever is moored to the mooring holes provided at both ends of the slide guide groove formed in the gripping trunk, the brush neck is easily fixed without swinging and the lumen of the gripping trunk is fixed. Since the elastic force of the spring interposed between the bottom and the floating rod is constantly applied to the operation lever, if the operation lever is removed from the mooring hole, sliding is performed semi-automatically,
The forward and backward bending operation of the brush neck portion is simple and quick, and even during the fixing operation, the sliding of the freeing rod causes an appropriate allowance due to the elastic spring of the spring, which facilitates the mooring and increases the fixing degree.

The protrusion formed on the central portion of the surface of the gripping trunk on the front side of the brush, which is the brush-implanted side, or the exposed portion outside the gripping trunk of the operating lever, is the inter-finger shape between the index and middle fingers, which is the gripping finger, or the thumb end, If it is configured as a protrusion that conforms to the finger surface shape on the side of the index finger trunk, even if the grip trunk becomes slippery due to saliva, toothpaste, water, etc., the grip posture is always maintained easily and the forearm swings. Since the movement is efficiently transmitted to the brush neck, not only efficient brushing is performed, but also an excellent effect is obtained from an ergonomic point of view such as less muscle fatigue.

Since the brush neck is detachably attached to the handle rod end, the problem that the production cost is increased by providing the main part of the constant angle rotation operation means of the handle rod in the grip trunk is a problem that the disposable part is brushed. It is solved by limiting to the neck.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the toothbrush of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially perspective exploded perspective view of an embodiment of a brush for dentifrice of the present invention. In FIG. 1, 1 is a grip trunk, 2 is a brush neck, and 3 is a handle. The handle rod 3 is provided between the brush neck portion 2 and the grip portion 1. Since the main part of the constant angle rotation operating means of the handle rod is internally provided in the grip trunk, a certain portion is hollow like the grip trunk lumen 1a.

A brush neck portion is detachably screwed to one end of the handle rod 3, and a pivot ring 4 is pivotally connected to the grip trunk 1 at the other end. The shaft 3 is rotatably pivotally connected to a pivotal groove 1b of the grip trunk 1 by a pin 5 at a pivotal ring 4 formed at the end thereof.

The stopper piece rotation stopping member 1c mounted on the bottom of the pivot connecting portion pivot groove has a constant thickness in the front-back direction of the brush, and in this embodiment, is integrally formed with the grip trunk 1. The metal core 1d is embedded in the end surface layer for reinforcement and wear prevention.

As shown in FIGS. 2 (a) and 2 (b), which are enlarged front and side views, the handle rod 3 has all notches on the back side of the brush at an angle of 90 degrees inside and outside from the handle rod end 3a. 6a is
Half-face cutouts 6b are formed on the front side of the brush at angles of 90 degrees inside and outside of the handle rod end 3a, and both end faces of all cutouts are
There are a backward bending stopper 7a and a forward bending stopper 7b, which are stopper pieces when the angle is fixed.

The stopper piece rotation stopping member 1c has a thickness which is appropriately smaller than the distance between the stoppers 7a and 7b, and is interposed near the position shown by the dotted line in FIG. 2 (b). .

In the edge region of the half cutout 6b of the pivot ring 4 and in the vicinity of the handle rod pivot center corresponding point of the stopper 7a at the time of backward bending, as shown in FIG.
As shown in (b), a pivotal connecting hole 9 of the connecting rod 8 is bored, and the bent portion 8 a of the connecting rod 8 is fitted into the pivoting hole 9. The connecting rod 8 is exposed from the handle rod 3 starting from the bent portion 8a, and is connected to the handle rod 3 along the center line extending in the axial direction of the handle rod 3 while being close to the pivot ring 4. It The end portion of the connecting rod 8 is bent toward the front surface of the brush at a different angle from the bent portion 8a by approximately 90 degrees, and this bent portion serves as a lever shaft 8b.

The lever shaft 8b projects out of the grip trunk 1 through a lever shaft slide guide groove 10 formed in the grip trunk 1.

An operation lever 11 is attached to the end of the lever shaft 8b, and the lever shaft 8 in the lever shaft sliding guide groove 10 is mounted.
It is easy for the sliding of b and the mooring to the mooring holes 10a for backward bending and the mooring holes 10b for forward bending provided at both ends of the sliding guide groove.

FIG. 3 is an enlarged exploded view around the connecting rod 8.
As shown in FIG. 5, a cylindrical traveling rod 12 is continuously provided in the vicinity of the inflection point of the lever shaft 8b, and the traveling rod 12 is slidably supported and guided by a shaft core 13 having a half-moon shaped cross section. There is.
As shown in FIG. 4, which is an enlarged cross-sectional view of the vicinity of the floating rod 12, the inner diameter of the hollow space of the floating rod 12 is such that the portion in which the spring 14 is fitted is larger than the portion on the brush neck side.
It is formed in a very small size.

The shaft core 13 keeps a certain distance from the inner wall of the gripping trunk lumen 1a in the gripping trunk lumen 1a so that the migratory rod 12 can slide easily, and the gripping trunk bottom 1e holds the grip trunk. 1 is fixed along a center line extending in the axial direction. The spring 14 is fitted between the shaft core 13 and is interposed between the grip trunk inner lumen bottom 1 e and the freeing rod 12.

As shown in FIG. 5, which is an external perspective view of the present embodiment, a half portion of a connecting rod 8 which constitutes a main part of the constant-angle turning operation means of the handle rod 3, and a free run provided continuously to the connecting rod 8. The rod 12, the shaft core 13 and the spring 14 are housed inside the gripping stem inner cavity 1a, and therefore, in appearance, the lever shaft sliding guide groove 10 and the mooring at the time of backward bending are attached to the gripping stem of an ordinary tooth brush. The hole 10a and the mooring hole 10b at the time of forward bending are formed, and the operation lever 11 is mounted externally.

The operating lever 11 which is exposed and attached to the central portion of the front surface of the brush of the gripping stem 1 has the shape of a flat lump-shaped gourd in which the upper and lower parts are notched, and the periphery of the constricted part is pinched. It is formed in a shape that fits the inter-finger shape between the middle and middle fingers of the index finger, or the finger surface shape of the thumb end or the side of the index finger trunk.

With the above construction, when the brush neck 2 is bent forward, the grip stem 1 is grasped, and the thumb is used to apply a force to the operation lever 11 to move the lever shaft 8b to the rear bending mooring hole 1.
No. 0a, and the lever shaft sliding groove 10 guides it to anchor it in the anchoring hole 10b during forward bending.

At this time, the free-moving rod 12 is guided by the shaft core 13 to move toward the bottom of the inner lumen 1e of the grasping trunk, but the connecting rod 8 also moves in the same direction as the free-moving rod 12 moves, and the thumb moves as described above. The force is transmitted to the pivot ring 4 in the pivot hole 9 into which the hanging portion 8a of the joint rod 8 is fitted, by using the joint rod 8 as a medium, and the handle rod 3 is rotated forward about the pin 5.

Since the shaft core 13 has a half-moon shape in cross section, and therefore the contact surface on which the connecting rod 8 slides is a flat surface, there is no intermingling between the connecting rod 8 and the shaft core 13, and the connecting rod 8 and the free-running rod do not move. The rod 12 slides smoothly.

When the handle rod 3 is rotated, since the half-face cutout portion 6b is formed from the pivotal hole 9 to the handle rod end 3a, the movement or pivoting of the connecting rod 8 causes the handle rod 3 to rotate. Less likely to interfere.

When the handle rod 3 is bent forward, the stopper 7 for bending forward is used.
b is stopped by abutting against the stopper piece rotation stopper 1c from the front of the brush, and the stopper piece rotation stopper 1c is stopped.
Depending on the thickness of the
Since the elastic force of the spring 14 is applied to the mooring of the b to the mooring hole 10b during forward bending, the degree of fixation of the handle rod 3 is strong, and the lower back of the lower dentition, the upper and lower dentition molars, and the vicinity thereof. The brush form is suitable for brushing teeth.

Since the metal piece 1d is buried in the end surface layer of the stopper piece rotation stopping material 1c for reinforcement and abrasion resistance, it is less likely to be damaged and has sufficient durability for long-term use.

On the contrary, when the brush neck 2 is bent backward, similarly, the grasping stem 1 is grasped and a force is applied to the operation lever 11 using the thumb to disengage the lever shaft 8b from the mooring hole 10b during forward bending. The lever shaft sliding groove 10 guides the mooring hole 10 during backward bending.
moored to a.

At this time, the migration rod 12 is guided by the shaft core 13 and migrates in a direction opposite to the grip stem inner lumen bottom 1e.
The connecting rod 8 also moves in the same direction as the freeing rod 12 moves, and the force of the thumb is used as a medium to pivot the linking ring 9 in the pivoting hole 9 into which the bent portion 8a of the linking rod 8 is inserted. 4, and the handle rod 3 is rotated backward about the pin 5.

When the handle rod 3 is bent backward, the pivot hole 9
Since the half-face cutout 6b is formed from the handle rod end 3a to the handle rod end 3, the movement or pivoting of the connecting rod 8 does not hinder the rotation of the handle rod 3 in the same way as in the forward bending rotation. .

The rearward rotation of the handle rod 3 is performed by the stopper 7 at the time of rearward bending.
a is abutted against the stopper piece rotation stopping member 1c from the back side of the brush, so that the stopper piece rotation stopping member 1c is prevented.
Depending on its thickness, it bends back at an appropriate angle and stands still.

When the lever shaft 8b is moored to the mooring hole 10a when it is bent backward, since the elastic force of the spring 14 is weaker than when it is bent forward, the fixing degree of the handle rod 3 is slightly weakened, but the upper teeth When brushing the back surface of the row and the upper molars, the brush neck portion 2 is normally pressed in the backward bending direction, so there is no practical inconvenience.

As described above, if the operating lever 11 is dismounted, slid, and moored with the thumb while gripping the grip trunk 1 with four fingers other than the thumb, the brush neck forward bending mode and the brush neck rearward bending mode can be obtained. Switching is simple and quick. Further, by adding a mooring hole or the like, the inclination angle of the brush neck portion 2 can be adjusted and fixed at any time.

Further, since the operating lever 11 is formed in a shape that conforms to both the inter-finger shape of the gripping fingers and the thumb end and the finger surface shape on the side of the index finger trunk, it is easy to hold it between two fingers. , The thumb end and the side of the index finger are appropriately contacted, and the gripping posture is firmly maintained even when the arm swings or when the gripping trunk 1 becomes slippery due to saliva, toothpaste, water, etc.,
Therefore, the brushing becomes efficient, and the shape is based on the ergonomic viewpoint, so that the muscle fatigue during the brushing is considerably reduced as compared with the conventional example.

The gripping stem 1 and the handle rod 3 require a considerable manufacturing cost, but since the brush neck 2 is detachably screwed to one end of the handle rod 3, wear deformation due to long-term use is prevented. Even if it occurs on the neck portion 2, it is sufficient that the cost burden on general consumers who use this embodiment is small if only the brush neck portion 2 is replaced.

[0045]

As described above in detail, according to the dentifrice brush of the present invention, by using one dentifrice brush, optimum brushing effects can be obtained depending on the brushing of different dentition sites. A brush for dentifrice having an inclined angle of the brush neck portion and the handle rod is provided at any time by a simple operation.

The operation lever exposed on the front surface of the grip trunk,
Alternatively, a protrusion that fits between the inter-finger shape or the finger surface shape that is projected on the front surface of the grip trunk is clamped by two fingers, the index finger and the middle finger, or abutted on the thumb end or the side of the index finger trunk. As a result, the brushing posture is firmly maintained, and the dentition is brushed efficiently with less muscle fatigue.

Further, the replacement of the brush neck portion, which is significantly deformed by wear, can be performed at a minute cost.

[Brief description of drawings]

1 is a partial perspective exploded perspective view of the brush for toothpaste of the present invention. FIG. 2A is an enlarged front view of a handle rod which is a member of the brush for toothpaste of the present invention, and FIG. 2B is a side view thereof. 3 is an exploded enlarged view of the vicinity of the connecting rod is a member of the brush for toothpaste of the present invention. 4 is an enlarged cross-sectional view of the vicinity of the traveling rod which is a member of the brush for toothpaste of the present invention. 5 is an external perspective view of the brush for toothpaste of the present invention.

[Explanation of symbols]

 1 Grip Trunk 1a Grip Trunk Lumen 1b Pivot Groove 1c Stopper Rotation Stopper 1d Metal Core 1e Grip Trunk Lumen Bottom 2 Brush Neck 3 Handle Rod 3a Handle Rod End 4 Pivot Ring 5 Pin 6a Full Cutout 6b Half Face Notch portion 7a Stopper for backward bending 7b Stopper for forward bending 8 Connection rod 8a Connection rod hanging portion 8b Lever shaft 9 Connection rod pivot connection hole 10 Lever shaft sliding groove 10a Mooring hole for forward bending 10b Mooring hole for backward bending 11 Operation Lever 12 Free-running rod 13 Shaft core 14 Spring

Claims (5)

[Claims] 1. A toothbrush having a brush stem connected to a grip trunk, and a handle rod interposed between the brush neck and the grip trunk, wherein the handle rod end has a handle rod end bent forward and backward by a predetermined angle. A brush for dentifrice, which is rotatably pivoted inside and is provided with brush neck fixing means at both rotary ends or at a predetermined angle. 2. A toothbrush brush in which a brush neck is continuously provided on a gripping stem, and a handle rod is provided between the brush neck and the gripping stem, in the center of the surface of the gripping trunk on the front side of the brush, which is the brush-implanted side. A brush for toothpaste, characterized in that protrusions are formed which conform to the shape between the gripping fingers or the shape of the finger surface. 3. A pivoting ring edge portion in which a main part of a constant-angle rotation operating means of a handle rod is installed inside a grip trunk and the handle-angle constant angle rotating operation means is formed at an end portion of the handle rod. A connecting rod pivotally attached to
A free-running rod connected to the connecting rod, a shaft core that slidably supports and guides the free-running rod, and a free-moving rod that is inserted in the shaft core and is interposed between the bottom of the grasping trunk lumen and the free-running rod. It is composed of
An operation lever projecting from the floating rod is guided in a sliding guide groove formed in the grip trunk, and a brush neck fixing means is formed on a hinge at the end of the handle rod, and a stopper piece, The handle stem connecting part of the gripping stem is composed of a stopper piece rotation stopping member provided at the bottom of the connecting groove of the connecting shaft and having an appropriate thickness in the front-back direction of the brush, and mooring holes provided at both ends of the sliding guide groove. The brush for toothpaste according to claim 1, wherein the brush is a toothbrush. 4. The exposed portion outside the gripping trunk of the operating lever is formed by:
The brush for toothpaste according to claim 3, wherein the brush is configured as a protrusion that conforms to the shape between the grasping fingers or the surface shape of the fingers. 5. The dentifrice brush according to claim 1, wherein the brush neck is detachable from the handle rod end.