KR-20260062420-A - Rotating type toothbrush

Abstract

The technical objective of the present invention is to provide a rotary toothbrush capable of preventing cervical abrasion by maintaining an inclined state on the surface of the teeth or gingiva without rotation of the user's wrist while brushing from top to bottom and from bottom to top. To this end, the rotary toothbrush of the present invention comprises: a handle portion having an elongated shape; a head portion having bristles on one surface; a connecting neck portion having a relatively slender shape that rotatably connects the head portion and the handle portion; and an elastic support portion in which a portion is fixed to the head portion and the other portion is elastically supported by the handle portion, and which applies a restoring force to the head portion while the head portion rotates relative to the connecting neck portion.

Inventors

• 김지혜

Assignees

• 김지혜

Dates

Publication Date

20260507

Application Date

20241029

Claims (3)

1. With a rotating toothbrush, A long handle part; A head portion having bristles on one surface; A connecting neck portion having a relatively slender shape that rotatably connects the head portion and the handle portion; and An elastic support member that is partially fixed to the head portion, has another portion elastically supported by the handle portion, and applies a restoring force to the head portion while the head portion rotates relative to the connecting neck portion; including Rotating toothbrush.
2. In Paragraph 1, The above handle portion is, A first handle adjacent to the above-mentioned connecting neck; and A second handle formed on the same axis as the first handle and detachably provided to the first handle; including Rotating toothbrush.
3. In paragraph 2, The above elastic support is, A long axis of rotation; A head-side shaft fixing part that fixes a first part of the rotation shaft to the head part; A first rotational support groove formed in the first handle and rotatably supporting a second portion of the rotation axis; and One or more elastic members connecting the rotation axis and the first handle and generating a restoring force to return the rotation axis to its original position while the rotation axis is rotated; including Rotating toothbrush.

Description

Rotating type toothbrush The present invention relates to a toothbrush. Generally, a toothbrush is an oral hygiene tool used to clean the surface of teeth or gingiva (gums) along with toothpaste. Figure 1 is a schematic diagram showing a conventional toothbrush. A conventional toothbrush, as illustrated in FIG. 1, includes a handle (11) that a user can hold with their hand, a head (12) that forms the end of the handle and moves in and out of the user's oral cavity during brushing, and bristles (13) that are equipped on the head and actually clean the teeth. Accordingly, while holding the handle (11), the user can squeeze a certain amount of toothpaste onto the bristles (13) and then bring the bristles (13) into contact with the teeth or gums. In addition, by applying appropriate force to the handle (11) and moving the bristles (13), food debris or plaque stuck in the surface or crevices of the teeth or gums can be removed through this brushing. Meanwhile, gingival recession (a condition in which the root surface is exposed as the gingiva moves to the apical region) progresses in middle-aged adults, with prevalence rates ranging from 8% in children to 100% in those over 50 years of age. Although gingival recession occurs in patients with healthy gingiva, it is more common in patients with periodontal disease and can progress to cervical abrasion due to improper brushing. Cervical abrasion occurs in multiple teeth and is more frequently observed in people who brush their teeth diligently. In cases of gingival recession, the dentin is exposed to some extent, making it prone to abrasion on the sides of the teeth. This is because while the enamel, the outermost layer of the tooth, is resistant to wear, dentin is vulnerable. In particular, since toothpaste contains abrasives (such as calcium carbonate, hydrated silicon dioxide, and dental-type silica), brushing in a direction perpendicular to the tooth's long axis (i.e., side-to-side) leads to cervical abrasion, where the gum line wears down. When cervical abrasion occurs, it causes sensitivity, and as the worn dentin becomes more susceptible to further abrasion, failure to treat it promptly can result in a situation requiring root canal treatment followed by crown restoration. Due to cervical abrasion, some people report sensitivity when drinking or holding cold water, or even when exposed to a cold wind. While these symptoms primarily appeared in those over 40, they are now being observed in people in their 20s and 30s, indicating a diversification of the age range. When the cervical area erodes and the inner tooth tissue (dentin) becomes exposed, sensitivity to external stimuli such as cold water or brushing can occur easily, and brushing further accelerates the erosion. In severe cases, the tooth nerve may even be exposed. If left untreated and continued to erode in this exposed state, it can ultimately lead to tooth fracture. As a dentist working for over 20 years, the applicant has seen many patients suffering from cervical abrasion, a condition in which the surface of the boundary between the teeth and gums wears down due to improper brushing. The applicant also developed cervical abrasion and, despite brushing carefully, experienced a vicious cycle where the more diligently the applicant brushed, the more severe the cervical abrasion became. Therefore, to prevent such cervical abrasion, brushing must be done along the long axis of the teeth, moving from top to bottom and bottom to top, while maintaining the toothbrush head at an angle of approximately 45 degrees relative to the tooth surface. Specifically, since the toothbrush head must rotate up and down along the long axis of the teeth, it can be estimated that the user's wrist must rotate approximately 90 degrees, combining the 45 degrees from top to bottom and the 45 degrees from bottom to top. Additionally, as 5 to 7 brushing strokes per area are recommended, it can be estimated that 90 to 126 wrist rotations are required to complete the brushing process. However, conventional toothbrushes have a technical configuration in which the toothbrush head must be maintained at an angle of about 45 degrees relative to the surface of the teeth when brushing to prevent cervical abrasion. Since the user's wrist must rotate about 90 degrees for one rotation by combining the 45 degrees from top to bottom and the 45 degrees from bottom to top, there is a problem in that it is difficult for people of all ages, including middle-aged and elderly people, to rotate their wrists more than 90 times at 3 to 4 times a day, and ultimately, because their wrists hurt, they end up brushing sideways (left and right directions), which further exacerbates cervical abrasion. Figure 1 is a schematic diagram showing a conventional toothbrush. FIG. 2 is a schematic diagram showing a rotary toothbrush according to one embodiment of the present invention. FIG. 3 is a longitudinal section view of the main part of the rotary toothbrush o