JP2554785Y2 - toothbrush - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothbrush for brushing teeth with an appropriate force.

[0002]

2. Description of the Related Art When brushing teeth, plaque can be removed and the gums can be massaged by pressing the toothbrush against the dentition with an appropriate force. On the other hand, if the toothbrush is pressed with an excessive force exceeding a certain force, the gums may be damaged, and in severe cases, the teeth may be worn so as to form a wedge. In particular, infants who have just started brushing exercises may brush with excessive power because they do not know the power.
On the contrary, brushing the teeth may damage the milk teeth and gums. In addition, even in the case of an adult who brushes excessively with a strong force, a problem still occurs.

[0003]

By the way, in order to prevent the above-mentioned problems, it is necessary to stop the force of pressing the toothbrush against the dentition from about 500 g to about 1 kg. Therefore, there is a demand for a toothbrush capable of brushing the teeth within a range not exceeding this. In such a configuration, a pressure gauge may be attached to the toothbrush to display the force applied to the toothbrush during brushing, or to alert the user with sound or light when a certain amount of force is exceeded, but this may be costly. It is not suitable for toothbrushes that have a heavy burden and are disposable. In addition, it is preferable that the handle of the toothbrush is as smooth as possible from a hygiene point of view,
Incorporating complex mechanisms should be avoided as much as possible.

Therefore, the inventor has achieved the object by adopting a structure in which the handle of the toothbrush is bent when an excessive force exceeding a certain force is applied, without impairing the basic structure of the conventional toothbrush. It was done.

[0005]

In order to achieve the above-mentioned object, according to the present invention, a handle of a toothbrush is formed of a heat-recoverable type shape memory resin, and at least an arbitrary portion between a brush stand and a grip is fixed. In this case, a means for forming a throttle portion which is plastically deformed and bent when a force is applied is used.

[0006]

[Function] The purpose of using a shape memory resin as a material of a handle is to repeatedly use a toothbrush, and even if an excessive force is applied to bend from a drawn portion, it is easily heated. This has the effect of restoring.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.
Is a brush, and the handle 1 is composed of three parts, a grip 3, a throat 4, and a brush stand 5. These basic structures are the same as those of a known toothbrush. In the present invention, the throat 4 has a shape characteristic in that a further throttle portion 6 is provided in a part thereof. The material of the handle 1 is a shape memory resin that restores its original shape when heated, and is processed by a known molding method such as injection molding.

Here, the throttle section 6 is perpendicular to the axial direction.
The structure is bent when a force exceeding 0 g to more than 1 kg is applied. For that purpose, it is necessary to adjust the diameter of the throttle section 6,
It is determined according to the composition and physical properties of the shape memory resin used. Further, since the way of gripping the toothbrush differs depending on the polishing position, it is preferable that the narrowed portion 6 has a circular cross-section so that it can bend under equal conditions regardless of the direction in which the force is applied.

The throttle portion 6 can be provided at an arbitrary position on the throat 4, and if an excessive force is applied, it will bend at this portion. However, when using the toothbrush, one of the first finger and the second finger becomes a power point or a fulcrum regardless of how to hold the toothbrush. It can be bent within a range without error. 2 and 3 show another structure of the toothbrush of the present invention. In FIG. 2, a finger rest 7 is provided at the boundary between the grip 3 and the throat 4, or in FIG. It is easier to polish. In each embodiment, the throat 4
Is formed in a part thereof so that it can be easily bent when a certain force or more is applied.

As the composition of the shape memory resin, known ones are employed. The material in the range of room temperature is memorized, and a material which can be restored to the room temperature shape by heating with hot water or the like is selected. Here, the reason why the shape memory resin is adopted is that the shape memory resin is repeatedly used even when it is bent by an excessive force in the drawn portion 6. The toothbrush is disposable if the life of the brush is extended, but if it is bent by the throttle unit 6 before that, it is very wasteful. Therefore, this waste can be avoided by restoring the shape. It should be noted that a toothbrush having a structure in which the handle 1 can be divided into the grip 3 and the brush base 5 can be a toothbrush exhibiting the same function by providing a throttle portion at a portion corresponding to the throat. . In this case, the grip or the brush stand, or only the portion on the side where the throttle portion is formed, may be made of a shape memory resin.

In this embodiment, the handle 1 in which the throat 4 is formed between the grip 3 and the brush stand 5 has been described. However, there is also a toothbrush in which the throat is not clearly formed due to its structure. Even in this case, it is a matter of course that the same operation can be performed by providing the throttle portion at an arbitrary position between the grip and the brush stand.

[0012]

[Effects of the Invention] In the present invention, a heat-recoverable shape memory resin is used for the handle, and a drawn portion is further formed.
When brushing with excessive force, it will bend easily from the squeezed part, preventing teeth and gums from being damaged, and exhibiting the optimal learning function if used in infant brushing practice it can. Further, even if the battery is once bent, it can be restored to its original shape by heating with hot water or the like, so that the brush can be used repeatedly until its life, and waste can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention;

FIG. 2 is a side view showing another embodiment;

FIG. 3 is a side view showing still another embodiment.

[Explanation of symbols]

 1 handle 2 brush 3 grip 4 throat 5 brush stand 6 squeezing section 7 finger rest

Claims (1)

(57) [Scope of request for utility model registration] 1. A with molding a toothbrush handle in heating restoration type of shape memory resin, and a diaphragm portion that is bent by plastic deformation when any part above a certain force between the stems and the grip is applied, bending The above-mentioned constriction section is applied to a preset temperature.
It is characterized by being restored to its original shape by heating
Toothbrush.