JPH038257Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a brush for cleaning the interdental area (hereinafter referred to as "interdental brush") for removing food residue, plaque, etc. that accumulates between the teeth. Regarding the improvement of

(Conventional technology and problems) Conventional interdental brushes are made by twisting relatively soft stainless steel copper wires (hereinafter referred to as "stranded wires") with nylon bristles wrapped around one end. The purpose of this device is to grasp the other end of the brush, insert the nylon bristles between the teeth, and rotate or reciprocate to remove foreign matter between the teeth. In order to ensure that the strands are narrow and to twist the strands tightly so that the nylon bristles do not fall out from between the strands, a relatively thin and soft metal wire must be used as the strand material. Figure 1). Therefore, under the above usage conditions,
Since the strands are easily bent, it is difficult to apply force to push the brush between the teeth, making it impossible to completely clean between the teeth.

In addition, when the strands are subjected to large repeated bending stress, they lose their restoring force in a relatively short period of time and remain bent or break, which not only shortens the lifespan of the brush, but also causes the sharp edges of the strands to become sharp. There was a risk of damage to the oral cavity.

In addition, in other interdental brushes in which the root part of the twisted wire is embedded in a hard plastic handle (Fig. 2) and used by gripping the handle, the handle is made of a hard material. Similarly, the problem of breakage of the strands remains because stress is locally concentrated at the joint between the strands and the handle. In addition, a method has been devised in which the stranded wire is fixed to a rod-shaped body and the brush part at the tip is bent at an appropriate angle (Figure 3), but this also causes stress to concentrate on the bent part, causing premature failure. This was a disadvantage of this type of brush, which was relatively expensive and prone to breakage.

The present invention improves the disadvantages of conventional interdental brushes, such as early breakage of the strands or bending due to loss of restoring force, and creates an interdental brush that has a long life and is less likely to cause damage to the oral cavity. This is what we provide.

(Means for Solving the Problems) The present invention provides a brush for cleaning the interdental area in which hairs made of nylon or the like are twisted at the tips of metal strands, in which the hairs of the metal strands are not twisted. A long non-twisted portion is formed, and a sinterable tubular body having an inner diameter approximately equal to the outer diameter of the twisted metal wire and having elastic restoring force is inserted into this portion. It is something.

(Example) To explain the configuration of the present invention with reference to an example, nylon bristles 2 are wound around one end brush 1a of a plurality of stainless steel wires 1, and twisted between the wires. Tightly fix. The proximal end 1b of the stranded wire is inserted into a resin pipe having a strong elastic restoring force, such as a hard vinyl chloride pipe 3. The end 1a of the vinyl chloride pipe 3 on the side opposite to the nylon hair side is heat-pressed to fix the inserted stranded wire. The inner diameter of the vinyl chloride pipe shall be as small as possible within a range that allows the stranded wire to be easily inserted. The stranded wire 1 and the vinyl chloride pipe 3 may be fixed by using an adhesive, or by cold caulking, or by changing the method in the longitudinal direction so that the side closer to the brush side is softer or thinner. Further, the base end side of the vinyl chloride pipe may be covered with another vinyl chloride pipe 6, or the ends 3a and 3b of the vinyl chloride piece 3 may be sealed.

(Effects of the invention) This invention improves the operability of interdental brushes,
Moreover, it can be used for a long time. In other words, the conventional one with a handle formed right next to the bristles
(Figure 2), when cleaning molars, you must put your finger into your mouth up to the base of the handle. However, with long twisted wires,
If you put the bristles between your molars and move them, the strands will bend after a few uses, making it impossible to apply the force you want.

In contrast, the present invention eliminates the need to insert the handle into the mouth when cleaning the back teeth.
It has great resilience against burns, so it can be inserted between the teeth as desired for cleaning, and has excellent effects such as not damaging the gums and reducing the discomfort caused by metal.

[Brief explanation of the drawing]

1, 2 and 3 show examples of conventional interdental brushes. FIG. 4 shows an interdental brush according to the present invention. FIG. 5 shows another embodiment of the present invention. 1... Material of stranded wire, 1a... One tip of stranded wire, 1b... Root part of stranded wire, 2... Nylon hair, 3... Vinyl chloride pipe, 3a... Nylon hair of vinyl chloride pipe side, 3b...the other side of the PVC pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] In a brush for cleaning interdental areas in which bristles made of nylon or the like are twisted at the tips of stranded metal wires, the non-twisted portions of the strands of metal wires in which the bristles are not twisted are made longer. A brush for cleaning interdental areas, characterized in that a flexible tubular body having an inner diameter approximately equal to the outer diameter of the stranded metal wire and having an elastic restoring force is inserted into this part. .