JP2002253344A - Interdental brush - Google Patents

Abstract

(57) [Problem] To prevent a wire holding a filament from being exposed, thereby preventing breakage of the wire. SOLUTION: Since an elastic tube body is interposed between the filament and the grip by inserting the wire, the wire is protected by the tube body, so that breakage of the wire can be avoided and pain due to galvanic current does not occur.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Currently used interdental brushes hold a bundle of filaments between two folded wires, and in this state, twist the wires spirally to form a brush portion.
In most cases, this is embedded in the grip.

[0003] When such an interdental brush is used, the angle of the brush portion may be changed as necessary. At this time, the wire of the brush portion is easily bent at the boundary with the grip, and once bent. The wire has a bending habit and is difficult to restore to its original shape. For this reason, conventionally, a flexible neck portion is formed by forming the tip side of the grip to be thin, and when changing the angle of the brush portion, the neck portion is operated with a finger so that the wire is not directly bent. Was.

[0004]

However, even with the above-mentioned conventional interdental brush, it is not possible to completely avoid breakage of the wire. This is because current molding methods do not allow the wire to be embedded in the grip without any exposure. That is, even with the interdental brush constituting the neck portion, there is a wire exposed portion of several millimeters at the tip of the neck portion, and as a result, the wire may be bent around the tip of the neck portion.

[0005] The current molding method referred to here means two methods of embedding a wire: an injection molding method and a method of heating the wire to melt the grip and embed the wire. And in the case of the former,
A part of the wire of the brush part is put into a mold, and a molten resin is poured into the mold to complete the interdental brush. At least the thickness of the mold is an exposed portion of the wire. In the latter case, since the filament is not melted when the wire is heated, the whole wire cannot be heated as a result, and the unheated portion becomes an exposed portion.

[0006] There is another problem as follows regarding the exposure of the wire. Conventionally, in the fields of chemistry and physiology, the existence of a so-called galvanic current has been known. This is a phenomenon in which a battery system is formed when an electrolyte solution or the like is interposed between different kinds of conductor metals, and a current flows by a chemical action according to the principle of a voltaic battery.
That is, due to the difference in the magnitude of the ionization tendency, electrons move from one metal to the other metal to generate current. Further, when different kinds of conductor metals are pressed against each other, a contact potential difference occurs in the portions, and there is a phenomenon that current flows.

[0007] Even when an interdental brush is used, galvanic current may flow between the wire and the oral cavity using saliva or the like as an electrolyte solution, which may cause pain or discomfort.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an interdental brush which can prevent breakage of a wire by having a structure in which a wire holding a filament is not exposed is provided. It is intended to provide.

[0009]

In order to achieve the above-mentioned object, the present invention provides an interdental brush in which a brush holding a filament with a stranded wire is fixed to a grip and inserted into the stranded wire. Then, a means was used in which a tube having elasticity was interposed between the filament and the grip.

According to a second aspect of the present invention, a means for forming the tip of the grip into a narrow shape to form a neck and inserting a tube into the tip of the neck is selected, and a third aspect is a means for employing an insulating tube. Was used.

[0011]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an embodiment of an interdental brush according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a brush portion, and 2 denotes a grip to which the brush portion 1 is fixed. The brush part 1 holds the filament 1b while spirally twisting a metal wire 1a such as stainless steel or aluminum. On the other hand, the grip 2 is formed of a synthetic resin, and the tip of the grip 2 is formed slightly narrower to form a neck portion 2a. And the brush part 1 is a wire 1a
The lower end is fixed by being embedded in the grip 2 through the neck 2a. The configuration so far is conventionally known, and the material and diameter of the brush portion 1 and the grip 2 are appropriately selected.

In FIG. 1, reference numeral 3 denotes a tube inserted into the neck 2a so as to cover an exposed portion of the wire 1a. The tube body 3 is made of an insulating material, and is preferably made of an elastic material such as vinyl, nylon, or rubber. More preferably, silicone rubber is applicable.

The tube body 3 has a neck portion 2a.
In this state, the wire 1a covers the entire exposed portion of the wire 1a. In other words, the tip of the wire 1a has a length in contact with or close to the filament 1b in the brush portion 1. In addition, the tube body 3 can be inserted from the tip (the upper side in the drawing) of the brush portion 1. Since the filament 1b falls down until it becomes thin enough to fit between the teeth, as a result, it can be seen that the diameter is substantially the same as the diameter of the wire 1a, and if the thickness is such, the tube 3 can be passed through without any problem. It is.

Further, the tube body 3 does not need to have a cylindrical shape having the same overall length. It may be a truncated conical cylinder whose front end is adjusted to the diameter of the wire 1a and whose diameter increases toward the rear end. Further, the inner diameter of the tube body 3 is maintained as it is or in a state where the diameter of the filament 1b is expanded.
Can be set to a thickness that can pass through.

According to the interdental brush of this embodiment, since the portion where the wire 1a has been exposed in the past is covered with the tube body 3, the wire 1a does not bend directly, and the tube body 3 also has the neck portion 2a. Can function the same as Further, since the tube body 3 functions as an insulator, no pain or discomfort due to the galvanic current is felt.

[0016]

As described above, according to the present invention,
Since the wire is inserted and the elastic tube is interposed between the filament and the grip, the wire is protected by the tube, so that breakage of the wire can be avoided and pain due to galvanic current does not occur.

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of an interdental brush according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brush part 1a Wire 1b Filament 2 Grip 2a Neck part 3 Tube body

Claims (3)

[Claims] An interdental brush in which a brush portion holding a filament with a stranded wire is fixed to a grip, wherein an elastic tube is inserted between the lower end of the filament and the grip. Brush between. 2. The interdental brush according to claim 1, wherein the tip of the grip is formed narrower to form a neck, and a tube is inserted into the tip of the neck. 3. The interdental brush according to claim 1, wherein the tube body is made of an insulating material.