JPS6129308Y2 - - Google Patents

Description

[Detailed explanation of the invention] When brushing your teeth, moving the brush in an up-and-down rotational direction is good for your teeth and gums, but current regular toothbrushes rely entirely on the muscles of your wrist and arm. The rotating motion is not always easy.

By the way, the twisting force between the thumb and the lubricant is quite strong, and this force is used to twist springs and tops, but when it comes to brushing teeth, current regular toothbrushes do not have a protruding finger rest. However, the twisting force of the thumb and index finger cannot be used.

Also, even with toothbrushes that have a finger rest, if you try to twist the handle with your thumb and forefinger, your other fingers will naturally grip the handle, so in the case of a regular toothbrush, your thumb, index finger, and other fingers will have to twist the handle. This results in a movement, and the movement becomes unnatural.

This idea adds finger movement to the rotational motion of the wrist and arm, moves the brush in the rotational direction more easily and naturally than the current method, and also utilizes the torsional elasticity of the handle to make it easier to brush teeth and gums in a good manner. The purpose is

Therefore, it is necessary to devise a structure that makes it easy to twist the handle in the direction of rotation with finger force, and at the same time does not weaken the pressure on the brush teeth.

Next, this invention will be specifically explained based on an embodiment shown in the drawings.

The handle of a normal toothbrush is rod-shaped, but the handle of the present invention has three plate-shaped reinforcing handles 2 protruding radially at the same angle from the thin central shaft handle 1. The tip of the reinforcing handle 2 forms a finger rest 3 where the thumb and index finger come into contact.

When brushing your teeth, when you twist the finger rest 3 between your thumb and forefinger, the central axis 1 of the toothbrush of the present invention is much thinner than a normal toothbrush, so it easily twists, and the untwistable head 4 at the tip of the toothbrush twists easily. Move the brush 5 attached to it in the rotation direction. This twisting action naturally involves squeezing the handle with the other three fingers and the palm of the hand, but in the case of the toothbrush of this invention, the reinforcing handle 2 protrudes in the radiation direction.
This prevents the central shaft 1 of the handle from deforming due to pressure on the teeth, and does not prevent the brush from being moved in the rotational direction by twisting it between the thumb and forefinger. That is, since the reinforcing handle 2 is plate-shaped, it is weak against twisting force and deforms easily, but it has strong resistance against pressure applied on the same plane of the plate-like shape.

In addition, the elasticity of the handle allows the twisted brush to restore its natural shape, allowing you to use it to rhythmically brush your teeth.

The toothbrush of the present invention has a durable structure that requires slightly less raw material than a regular toothbrush, and can be molded in one piece from synthetic resin, so the cost is the same as a current regular toothbrush.

In order to get the benefit of rotating the toothbrush with the power of your fingers, you need to learn the habit of moving your thumb and index finger, but the movement that spreads to your arms, wrists, and fingers is a natural human body function. It is not unreasonable to say that the current tooth-brushing motion is actually a more unnatural motion.
Although the toothbrush of this invention has such advantages,
There is no inferiority to current toothbrushes, and if proper instruction on tooth brushing becomes widespread, it is thought to have a great effect.

[Brief explanation of the drawing]

Figure 1 is a rear view of this invention, Figure 2 is a side view of this invention, Figure 3 is a sectional view taken along line A-A in Figure 2,
FIG. 4 is a sectional view taken along line B--B in FIG. 2. 1: Central axis of the handle, 2: Reinforced handle, 3: Finger rest,
4: Head, 5: Brush.

Claims (1)

[Scope of utility model registration request] The thumb and index finger of the handle twist in the direction of rotation, which is made by integrally combining a handle 1 with a central shaft that is significantly thinner than usual, and three or more reinforcing handles 2 that protrude radially from the handle 1 as the central axis. This toothbrush has a finger rest 3 molded on the contacting part and a brush 5 attached to an untwisted head 4 at the tip.