toothbrush

Abstract

The present invention provides a toothbrush that can be inserted into and reach the buccal side of the maxillary molars, the lingual side of the mandibular molars, and the deep areas of the dorsal surface of the tongue, ensuring thorough cleaning. [Solution] The length of the bristles at the tip of the toothbrush is made shorter compared to the length of the bristles at the rear end, making the brushing surface flat and parallel to the handle. This makes it possible to significantly improve the effectiveness of mechanical cleaning.

Description

Technical Field

[0001] The present invention relates to a toothbrush having a brushing surface parallel to the handle portion.

Background Art

[0002] It is well known that mechanical cleaning with a toothbrush is effective in preventing dental caries and periodontal diseases.

[0003] For the cervical region, adjacent surfaces, and interdental papillae where polishing residues are likely to occur, cleaning can be performed with dental floss or an interdental brush, which are auxiliary cleaning tools.

[0004] On the other hand, it is difficult to insert and reach the buccal side of the maxillary molars narrowed by the muscle protrusion that comes out forward due to the opening, and the lingual side of the mandibular molars or the deep part of the dorsal surface of the tongue that is likely to cause a gag reflex, and reliable cleaning cannot be performed.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a toothbrush that can be inserted and reached to the buccal side of the maxillary molars, the lingual side of the mandibular molars, or the deep part of the dorsal surface of the tongue, and can perform brushing reliably.

Means for Solving the Problems

[0006] The toothbrush according to the present invention includes the following inventions.

[0007] (i) A toothbrush comprising a head (2), a neck (3), and a handle (4) having a tuft base (7) on which tufts (11) are implanted, wherein the head (2) is bent at the neck (3) such that the brushing surface (8) of the tufts (11) implanted on the tuft base (7) is flat and parallel to the handle (4).

[0008] (ii) The toothbrush according to (i), in which the tufts (11) are implanted perpendicular to the tuft base (7).

[0009] (iii) The toothbrush according to (i), wherein the bristle bundles (11) are planted perpendicular to the center line of the handle.

[0010] (iv) A toothbrush according to (ii) or (iii), wherein the length (h1) of the bristle bundle (9) at the tip is set to approximately 60% of the length (h2) of the bristle bundle (10) at the rear end, and the length is gradually shortened from the rear end to the tip to create a flat brushing surface. [Effects of the Invention]

[0011] By shaping the toothbrush as described in this invention, insertion and access to the buccal side of the maxillary molars, the lingual side of the mandibular molars, and the deep areas of the dorsum of the tongue become easier, and the gag reflex is also reduced. As a result, the mechanical cleaning effect of the toothbrush is significantly improved, making it possible to reduce bacteria in the oral cavity.

[0012] Furthermore, by aligning the handle and the brush surface parallel to each other, the movement of the hand during brushing and the movement of the brush surface become synchronized.

[0013] This is an extremely important feature because it improves toothbrush operation, ensures more thorough mechanical cleaning, and enhances effectiveness. [Brief explanation of the drawing]

[0014] [Figure 1] A side view of a typical toothbrush body. [Figure 2] A typical rear view of a toothbrush body. [Figure 3] A plan view of a typical toothbrush body, seen from the ventral side. [Figure 4] A side view of a toothbrush (Type I) incorporating the present invention. [Figure 5] A magnified view of the area circled in Figure 4. [Figure 6] A side view of a toothbrush (Type II) incorporating the present invention. [Figure 7] A magnified view of the area circled in Figure 6. [Modes for carrying out the invention]

[0015] As an embodiment, the type I toothbrush shown in FIG. 4 will be described.

[0016] A toothbrush of a basic size that is widely and commonly used, that is, a toothbrush in which a tuft of bristles with a length of 10 mm is implanted in three rows and ten columns on a bristle base with a width of 8 mm and a vertical length of 20 mm was used.

[0017] Regarding the tuft of bristles of the above-mentioned toothbrush, after trimming the length of the tuft of bristles at the tip so that it becomes 6 mm and the brushing surface becomes flat, the neck is gently heated and bent by about 10 degrees so that the brushing surface is parallel to the handle, and a toothbrush implementing the requirements of the present invention was produced.

Industrial Applicability

[0018] In order to produce the type II of the toothbrush implementing the present toothbrush, the implantation direction of the tuft of bristles must be inclined forward. Therefore, since the manufacturing method of the existing toothbrush is different, it is considered difficult to introduce.

[0019] On the other hand, the type I of the toothbrush implementing the present invention can be implemented by processing an existing toothbrush.

[0020] Set the length h1 of the tuft of bristles at the tip of the toothbrush with the length h2 of the tuft of bristles so that h2>h1.

[0021] Considering the elasticity of the tuft of bristles, it is considered that the length h1 of the tuft of bristles at the tip is preferably about 60% of the length h2 of the tuft of bristles at the rear end, but it is arbitrary.

[0022] After trimming so that the brushing surface becomes flat, bend the head at the neck.

[0023] Considering the bending angle, θ = θ’, and since tanθ = (h2 - h1) / D, the angle for making the handle and the brushing surface parallel can be easily obtained.

[0024] Furthermore, in the Type I toothbrush incorporating the present invention, the apparent length of the bristle bundle is sinθ times the actual length, making it slimmer compared to Type II. This is advantageous in enabling insertion and reaching the deep areas of the buccal side of the maxillary molars, the lingual side of the mandibular molars, and the dorsum of the tongue.

[0025] Although embodiments of the present invention have been described above, the present invention is not limited in any way to these examples, and can be implemented in various forms without departing from the scope of the present invention. [Explanation of symbols]

[0026] 1 Main unit 2 heads 3 Cervical region 4 handle 5 rows of hair strands 6 rows of hair strands 7. Hair implantation stand W Width of the hair implantation area D. Vertical length of the hair implantation area 8 Brushing surface 9 Tip 10 Rear end 11 strands of hair P The point at the foremost edge of the leg implanted on the bristle base (7) of the bristle bundle (11) at the tip (9) TIFF2026131536000002.tif2158h1 Length of the hair bundle (11) at the tip (9) TIFF2026131536000003.tif15126

Claims

1. A toothbrush in which the head (2) is bent towards the brushing surface (8) at the neck (3), and the brushing surface (8) of the bristle bundle (11) planted on the head (2) is parallel to the handle (4).

2. A toothbrush in which the brushing surface (8) is made flat by planting bristles (10) in progressively shorter lengths from the rear end to the front end, and the head (2) is bent at the neck (3) toward the brushing surface (8) so that the brushing surface (8) and the handle (4) are parallel.

3. This toothbrush has a head (2) that is bent towards the brushing surface (8) at the neck (3), and the bristle bundles (11) are planted in the head (2) so that the length of the bristle bundles (10) at the rear end is gradually shortened to the bristle bundles (9) at the front end, so that the brushing surface (8) is parallel to the handle (4).

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