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TW202130301A - Toothbrush - Google Patents

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Publication number
TW202130301A
TW202130301A TW110115027A TW110115027A TW202130301A TW 202130301 A TW202130301 A TW 202130301A TW 110115027 A TW110115027 A TW 110115027A TW 110115027 A TW110115027 A TW 110115027A TW 202130301 A TW202130301 A TW 202130301A
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TW
Taiwan
Prior art keywords
head
neck
bending amount
height
amount
Prior art date
Application number
TW110115027A
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Chinese (zh)
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TWI770960B (en
Inventor
金丸直史
Original Assignee
日商獅子股份有限公司
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    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/002—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions
    • A46B5/0054—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions designed to allow relative positioning of the head to body
    • A46B5/0062—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions designed to allow relative positioning of the head to body being flexible or resilient during use
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/02—Brush bodies; Handles integral with brushware specially shaped for holding by the hand
    • A46B5/021—Grips or handles specially adapted to conform to the hand
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

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  • Brushes (AREA)

Abstract

Provided is a toothbrush having more excellent cleaning power and a more excellent feeling of use. The toothbrush (1) is characterized by comprising a grip body (10) provided with a head (2), a neck (4) provided so as to extend to the head (2), and a grip part (6) provided so as to extend to the neck (4), wherein hair bundles are implanted on a hair implantation surface of the head (2), and the product of the amount of deflection A of the head (2) and the amount of deflection B of the neck (4) measured by a specific measurement method is 0.8-10.

Description

牙刷toothbrush

本發明是有關於一種牙刷。 本申請案基於2016年3月9日在日本申請的日本專利特願2016-045368號並主張優先權，且將其內容引用於本申請案中。The present invention relates to a toothbrush. This application is based on Japanese Patent Application No. 2016-045368 filed in Japan on March 9, 2016 and claims priority, and the content is cited in this application.

於預防齲齒、牙周病時，重要的是藉由使用牙刷的刷牙來去除口腔內的牙菌斑（plaque）。先前，為了提高牙菌斑去除效果，提出有各種牙刷。例如，藉由使牙刷的頭部變薄，並使頸部變細，而可使牙刷毛到達通常的牙刷難以到達的臼齒的深處（臼齒的咽喉側）。於專利文獻1中記載有一種頭部經薄型化、且於口腔內的操作性優異的牙刷。 另一方面，對於有牙周疾病的生活者等而言，藉由使用牙刷的刷牙來去除牙周袋（periodontal pocket）的污垢、或牙齦的按摩變得重要。於去除牙周袋的污垢、或牙齦的按摩時，需要牙刷毛的適度的彎曲，迄今為止提出有使直徑細的牙刷毛密集的牙刷、或使用前端極細毛等的牙刷。 [現有技術文獻] [專利文獻]When preventing tooth decay and periodontal disease, it is important to remove plaque in the oral cavity by brushing with a toothbrush. Previously, various toothbrushes have been proposed in order to improve the effect of removing plaque. For example, by thinning the head of the toothbrush and thinning the neck, the toothbrush bristles can reach the depths of the molars (the throat side of the molars), which is difficult to reach with normal toothbrushes. Patent Document 1 describes a toothbrush with a thin head and excellent operability in the oral cavity. On the other hand, for people with periodontal disease, etc., it is important to remove the dirt of the periodontal pocket by brushing with a toothbrush, or to massage the gums. To remove dirt from the periodontal pocket or massage the gums, appropriate bending of the toothbrush bristles is required. To date, toothbrushes with dense bristles of fine diameter or toothbrushes using extremely fine bristles have been proposed. [Prior Art Literature] [Patent Literature]

[專利文獻1]日本專利特開平7-143914號公報[Patent Document 1] Japanese Patent Laid-Open No. 7-143914

[發明所欲解決之課題] 但是，若為了提高對於通常的牙刷難以到達的臼齒的深處等的清掃力而僅使牙刷的頭部變薄，則頭部的耐折強度或毛束的脫落強度下降，且牙刷的品質下降。另外，因使頭部變薄，於使用時頭部容易彎曲且毛束擴展等而損害使用者的使用感。因此，使頭部變薄存在極限。 另外，藉由加大牙刷毛的彎曲，使對於牙齦的接觸感變得良好，而可提高使用感。但是，若牙刷毛的彎曲過大，則產生如下等問題：牙刷毛朝牙周袋中的進入性下降且清掃力下降，或毛分叉變大，牙刷的耐久性下降。[The problem to be solved by the invention] However, if only the head of the toothbrush is made thin in order to improve the cleaning power against the deep parts of the molars, etc., which are difficult to reach with a normal toothbrush, the bending strength of the head or the strength of the hair bundle falling off will decrease, and the quality of the toothbrush will decrease. . In addition, due to the thinning of the head, the head tends to bend and the hair bundles expand during use, which impairs the user's feeling of use. Therefore, there is a limit to making the head thinner. In addition, by increasing the curvature of the toothbrush bristles, the contact feeling to the gums becomes better, and the feeling of use can be improved. However, if the curvature of the toothbrush bristles is too large, problems such as a decrease in the penetration of the toothbrush bristles into the periodontal pocket and a decrease in the cleaning power, or the increase in the branching of the bristles, the durability of the toothbrush decreases.

本發明是鑒於所述情況而成者，其目的在於提供一種清掃力更優異、且使用感更優異的牙刷。 [解決課題之手段]The present invention was made in view of the above circumstances, and its object is to provide a toothbrush that is more excellent in cleaning power and more comfortable in use. [Means to solve the problem]

本發明具有以下的構成。 [1] 一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上植設有毛束，並且藉由下述的方法（α）所測定的所述頭部的彎曲量A與藉由下述的方法（β）所測定的所述頸部的彎曲量B的積為0.8～10。所述彎曲量A為0.5～3.0，所述彎曲量B為2.1～5.0。所述頭部的厚度為2.0 mm～4.0 mm、且所述頸部的最小的寬度與最小的厚度中的小的一方為3.0 mm～4.5 mm。所述柄體的材質為聚丙烯樹脂。 方法（α）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頭部與所述頸部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A。 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。 [2] 如[1]所述的牙刷，其中所述頭部的彎曲量A與所述頸部的彎曲量B的積為2～10。 [3] 如[1]或[2]所述的牙刷，其中藉由下述的方法（α'）所測定的所述頭部的彎曲量A'與所述頸部的彎曲量B的積為2.5～12。 方法（α'）：使所述頭部的植毛面朝向鉛垂方向的上方，以將自所述頭部與所述頸部的邊界的位置朝所述柄部側移動10 mm的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A'。 [4] 一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上植設有毛束，並且藉由下述的方法（α'）所測定的所述頭部的彎曲量A'與藉由下述的方法（β）所測定的所述頸部的彎曲量B的積為2.5～12。所述彎曲量A'為1～5，所述彎曲量B為2.1～5.0。所述頭部的厚度為2.0 mm～4.0 mm、且所述頸部的最小的寬度與最小的厚度中的小的一方為3.0 mm～4.5 mm。所述柄體的材質為聚丙烯樹脂。 方法（α'）：使所述頭部的植毛面朝向鉛垂方向的上方，以將自所述頭部與所述頸部的邊界的位置朝所述柄部側移動10 mm的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A'。 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。 [5] 如[1]、[2]或[4]所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.5 mm。 [6] 如[1]、[2]或[4]所述的牙刷，其中構成所述毛束的牙刷毛的毛尖強度為1.7 N～3.0 N。 [7] 如[3]所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.5 mm。 [8] 一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上植設有毛束，並且於所述頭部的所述植毛面上植設有所述毛束的形態為平線式植毛。所述頭部的厚度為2.0 mm～4.0 mm。所述頸部的最小的寬度為3.0 mm～4.5 mm，最小的厚度為3.0 mm～4.5 mm。藉由下述的方法（α'）所測定的所述頭部的彎曲量A'與藉由下述的方法（β）所測定的所述頸部的彎曲量B的積為2.5～12。所述彎曲量A'為1～5 mm。所述彎曲量B與所述彎曲量A'的比（B/A'）為0.8～2.5。 方法（α'）：使所述頭部的植毛面朝向鉛垂方向的上方，以將自所述頭部與所述頸部的邊界的位置朝所述柄部側移動10 mm的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A'。 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。 [9] 如[8]所述的牙刷，其中所述頭部的彎曲量A'與所述頸部的彎曲量B的積為2.5～10。 [10] 如[8]或[9]所述的牙刷，其中所述彎曲量B與所述彎曲量A'的比（B/A'）為0.8～2.0。 [11] 如[8]或[9]所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.2 mm。 [12] 如[8]或[9]所述的牙刷，其中所述彎曲量B為2.1～5.0 mm。 [13] 如[8]或[9]所述的牙刷，其中藉由下述的方法（α）所測定的所述頭部的彎曲量A與所述頸部的彎曲量B的積為2～10。 方法（α）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頭部與所述頸部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A。 [14] 如[13]所述的牙刷，其中所述彎曲量B與所述彎曲量A的比（B/A）為1.5～5.0。 [15] 如[13]所述的牙刷，其中所述彎曲量A為0.4～3.0 mm。 [16] 如[8]或[9]所述的牙刷，其中構成所述毛束的牙刷毛的毛尖強度為1.7 N～3.0 N。 [17] 一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上植設有毛束，並且於所述頭部的所述植毛面上植設有所述毛束的形態為平線式植毛。所述頭部的厚度為2.0 mm～4.0 mm，所述頸部的最小的寬度為3.0 mm～4.5 mm。所述柄體的材質為聚丙烯樹脂。當將藉由下述的方法（α）所測定的所述頭部的彎曲量設為A，並將藉由下述的方法（β）所測定的所述頸部的彎曲量設為B時，相對於頭部的長度（L2）的頭部的彎曲量（A/L2）的值X為0.015～0.045。相對於所述頭部的長度（L2）與頸部的長度（L3）的和（L2＋L3）的所述頸部的彎曲量（B/（L2＋L3））的值Y與所述X的比，即Y/X為0.8～2.0。 方法（α）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頭部與所述頸部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A。 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。 [18] 一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上植設有毛束，並且於所述頭部的所述植毛面上植設有所述毛束的形態為平線式植毛。所述頭部的厚度為2.0 mm～4.0 mm，所述頸部的最小的寬度為3.0 mm～4.5 mm。所述柄體的材質為聚縮醛樹脂。當將藉由下述的方法（α）所測定的所述頭部的彎曲量設為A，並將藉由下述的方法（β）所測定的所述頸部的彎曲量設為B時，相對於頭部的長度（L2）的頭部的彎曲量（A/L2）的值X為0.027～0.035。相對於所述頭部的長度（L2）與頸部的長度（L3）的和（L2＋L3）的所述頸部的彎曲量（B/（L2＋L3））的值Y與所述X的比，即Y/X為1.0～1.4。 方法（α）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頭部與所述頸部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A。 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。 [19] 如[17]或[18]所述的牙刷，其中所述彎曲量A為0.4～3.0 mm，所述彎曲量B為2.1～5.0 mm。 [20] 如[17]或[18]所述的牙刷，其中所述頸部的最小的厚度為3.0 mm～4.5 mm。 [21] 如[17]或[18]所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.2 mm。 [22] 如[20]所述的牙刷，其中所述頸部的最小的厚度為3.0 mm～4.2 mm。 [23] 一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上藉由平線式植毛植設有多個毛束。所述頭部的厚度為2.0 mm～4.0 mm。所述頸部的最小的寬度與最小的厚度中的小的一方為3.0 mm～4.5 mm，並且在藉由下述的方法（α）所測定的所述頭部的彎曲量A與藉由下述的方法（β）所測定的所述頸部的彎曲量B中，所述彎曲量A為0.4～3.0 mm，所述彎曲量B為2.1～5.0 mm。所述彎曲量A與所述彎曲量B的差（B－A）為1 mm≦（B－A）≦4 mm。所述彎曲量A的以mm所表示的數值與所述彎曲量B的以mm所表示的數值的積為0.84～10。 方法（α）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頭部與所述頸部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A。 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。 [24] 如[23]所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.5 mm，最小的厚度為3.0 mm～4.5 mm。 [25] 如[23]或[24]所述的牙刷，其中所述彎曲量A的以mm所表示的數值與所述彎曲量B的以mm所表示的數值的積為2～10。 [26] 如[23]或[24]所述的牙刷，其中所述彎曲量A為0.5～2.0 mm，所述彎曲量B為2.1～4.0 mm。 [27] 如[23]或[24]所述的牙刷，其中構成所述毛束的牙刷毛的毛尖強度為1.7 N～3.0 N。 [28] 如[23]或[24]所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.2 mm。 [29] 如[23]或[24]所述的牙刷，其中所述柄體的材質為聚丙烯樹脂。 [發明的效果]The present invention has the following constitution. [1] A toothbrush, characterized in that it includes a handle with a head, a neck extending on the head, and a handle extending on the neck, and on the hair-implanting surface of the head The top is implanted with hair bundles, and the amount of curvature A of the head measured by the following method (α) and the amount of curvature B of the neck measured by the following method (β) are The product is 0.8-10. The bending amount A is 0.5 to 3.0, and the bending amount B is 2.1 to 5.0. The thickness of the head is 2.0 mm to 4.0 mm, and the smaller of the smallest width and the smallest thickness of the neck is 3.0 mm to 4.5 mm. The material of the handle body is polypropylene resin. Method (α): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the head and the neck is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a 200 g weight is hung from the front end of the hair transplanting part at a position of 10±3%, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount A of the head. Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. [2] The toothbrush according to [1], wherein the product of the amount of curvature A of the head and the amount of curvature B of the neck is 2-10. [3] The toothbrush according to [1] or [2], wherein the product of the amount of curvature A'of the head and the amount of curvature B of the neck measured by the following method (α') For 2.5～12. Method (α'): Make the tufted surface of the head face upward in the vertical direction, and fix the position by moving 10 mm from the position of the border between the head and the neck toward the shank side The height of the front end of the handle body in the state is the reference height, and in the fixed state, the length relative to the long axis direction of the hair transplantation part in the head is 10 from the front end of the hair transplantation part. Hang a weight of 200 g at the position of ±3%, and set the height displacement (in mm) of the front end of the handle body after 10 seconds from the reference height as the bending of the head量A'. [4] A toothbrush, characterized in that it includes a handle with a head, a neck extending on the head, and a handle extending on the neck, and on the hair transplant surface of the head There are hair bundles on the implant, and the amount of curvature A'of the head measured by the following method (α') and the amount of curvature of the neck measured by the following method (β) The product of B is 2.5-12. The bending amount A'is 1 to 5, and the bending amount B is 2.1 to 5.0. The thickness of the head is 2.0 mm to 4.0 mm, and the smaller of the smallest width and the smallest thickness of the neck is 3.0 mm to 4.5 mm. The material of the handle body is polypropylene resin. Method (α'): Make the tufted surface of the head face upward in the vertical direction, and fix the position by moving 10 mm from the position of the border between the head and the neck toward the shank side The height of the front end of the handle body in the state is the reference height, and in the fixed state, the length relative to the long axis direction of the hair transplantation part in the head is 10 from the front end of the hair transplantation part. Hang a weight of 200 g at the position of ±3%, and set the height displacement (in mm) of the front end of the handle body after 10 seconds from the reference height as the bending of the head量A'. Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. [5] The toothbrush according to [1], [2] or [4], wherein the smallest width of the neck is 3.0 mm to 4.5 mm. [6] The toothbrush according to [1], [2] or [4], wherein the tip strength of the toothbrush bristles constituting the tuft is 1.7 N to 3.0 N. [7] The toothbrush according to [3], wherein the smallest width of the neck is 3.0 mm to 4.5 mm. [8] A toothbrush, characterized in that it includes a handle with a head, a neck extending on the head, and a handle extending on the neck, and on the hair transplant surface of the head The hair tufts are planted on the top, and the hair tufts are planted on the tufting surface of the head in a form of flat-line type tufts. The thickness of the head is 2.0 mm to 4.0 mm. The minimum width of the neck is 3.0 mm to 4.5 mm, and the minimum thickness is 3.0 mm to 4.5 mm. The product of the bending amount A'of the head measured by the following method (α') and the bending amount B of the neck measured by the following method (β) is 2.5-12. The bending amount A'is 1 to 5 mm. The ratio of the bending amount B to the bending amount A'(B/A') is 0.8 to 2.5. Method (α'): Make the tufted surface of the head face upward in the vertical direction, and fix the position by moving 10 mm from the position of the border between the head and the neck toward the shank side The height of the front end of the handle body in the state is the reference height, and in the fixed state, the length relative to the long axis direction of the hair transplantation part in the head is 10 from the front end of the hair transplantation part. Hang a weight of 200 g at the position of ±3%, and set the height displacement (in mm) of the front end of the handle body after 10 seconds from the reference height as the bending of the head量A'. Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. [9] The toothbrush according to [8], wherein the product of the bending amount A'of the head and the bending amount B of the neck is 2.5-10. [10] The toothbrush according to [8] or [9], wherein the ratio (B/A') of the bending amount B to the bending amount A'is 0.8 to 2.0. [11] The toothbrush according to [8] or [9], wherein the smallest width of the neck is 3.0 mm to 4.2 mm. [12] The toothbrush according to [8] or [9], wherein the bending amount B is 2.1 to 5.0 mm. [13] The toothbrush according to [8] or [9], wherein the product of the amount of curvature A of the head and the amount of curvature B of the neck measured by the following method (α) is 2 ~10. Method (α): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the head and the neck is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a 200 g weight is hung from the front end of the hair transplanting part at a position of 10±3%, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount A of the head. [14] The toothbrush according to [13], wherein the ratio (B/A) of the bending amount B to the bending amount A is 1.5 to 5.0. [15] The toothbrush according to [13], wherein the bending amount A is 0.4 to 3.0 mm. [16] The toothbrush according to [8] or [9], wherein the tip strength of the toothbrush bristles constituting the tuft is 1.7 N to 3.0 N. [17] A toothbrush, characterized in that it includes a handle with a head, a neck extending on the head, and a handle extending on the neck, and on the hair transplant surface of the head The hair tufts are planted on the top, and the hair tufts are planted on the tufting surface of the head in a form of flat-line type tufts. The thickness of the head is 2.0 mm to 4.0 mm, and the minimum width of the neck is 3.0 mm to 4.5 mm. The material of the handle body is polypropylene resin. When the amount of curvature of the head measured by the following method (α) is set to A, and the amount of curvature of the neck measured by the following method (β) is set to B , The value X of the bending amount (A/L2) of the head relative to the length (L2) of the head is 0.015 to 0.045. The ratio of the value Y of the neck bending amount (B/(L2+L3)) to the X relative to the sum (L2+L3) of the length of the head (L2) and the length of the neck (L3), namely Y/X is 0.8 to 2.0. Method (α): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the head and the neck is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a 200 g weight is hung from the front end of the hair transplanting part at a position of 10±3%, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount A of the head. Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. [18] A toothbrush, characterized in that it comprises a handle body with a head, a neck extending on the head, and a handle extending on the neck, and on the hair grafting surface of the head The hair tufts are planted on the top, and the hair tufts are planted on the tufting surface of the head in a form of flat-line type tufts. The thickness of the head is 2.0 mm to 4.0 mm, and the minimum width of the neck is 3.0 mm to 4.5 mm. The material of the handle body is polyacetal resin. When the amount of curvature of the head measured by the following method (α) is set to A, and the amount of curvature of the neck measured by the following method (β) is set to B , The value X of the bending amount (A/L2) of the head relative to the length (L2) of the head is 0.027 to 0.035. The ratio of the value Y of the neck bending amount (B/(L2+L3)) to the X relative to the sum (L2+L3) of the length of the head (L2) and the length of the neck (L3), namely Y/X is 1.0 to 1.4. Method (α): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the head and the neck is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a 200 g weight is hung from the front end of the hair transplanting part at a position of 10±3%, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount A of the head. Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. [19] The toothbrush according to [17] or [18], wherein the bending amount A is 0.4 to 3.0 mm, and the bending amount B is 2.1 to 5.0 mm. [20] The toothbrush according to [17] or [18], wherein the minimum thickness of the neck is 3.0 mm to 4.5 mm. [21] The toothbrush according to [17] or [18], wherein the smallest width of the neck is 3.0 mm to 4.2 mm. [22] The toothbrush according to [20], wherein the minimum thickness of the neck is 3.0 mm to 4.2 mm. [23] A toothbrush, characterized in that it includes a handle body with a head, a neck extending on the head, and a handle extending on the neck, and on the hair grafting surface of the head There are multiple hair bundles on the top by flat-line hair transplanting. The thickness of the head is 2.0 mm to 4.0 mm. The smaller of the smallest width and the smallest thickness of the neck is 3.0 mm to 4.5 mm, and the bending amount A of the head measured by the following method (α) is determined by In the bending amount B of the neck portion measured by the method (β), the bending amount A is 0.4 to 3.0 mm, and the bending amount B is 2.1 to 5.0 mm. The difference (B-A) between the bending amount A and the bending amount B is 1 mm≦(B-A)≦4 mm. The product of the numerical value expressed in mm of the bending amount A and the numerical value expressed in mm of the bending amount B is 0.84-10. Method (α): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the head and the neck is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a 200 g weight is hung from the front end of the hair transplanting part at a position of 10±3%, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount A of the head. Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. [24] The toothbrush according to [23], wherein the smallest width of the neck is 3.0 mm to 4.5 mm, and the smallest thickness is 3.0 mm to 4.5 mm. [25] The toothbrush according to [23] or [24], wherein the product of the numerical value expressed in mm of the bending amount A and the numerical value expressed in mm of the bending amount B is 2-10. [26] The toothbrush according to [23] or [24], wherein the bending amount A is 0.5 to 2.0 mm, and the bending amount B is 2.1 to 4.0 mm. [27] The toothbrush according to [23] or [24], wherein the tip strength of the toothbrush bristles constituting the tuft is 1.7 N to 3.0 N. [28] The toothbrush according to [23] or [24], wherein the smallest width of the neck is 3.0 mm to 4.2 mm. [29] The toothbrush according to [23] or [24], wherein the material of the handle body is polypropylene resin. [Effects of the invention]

本發明的牙刷的清掃力更優異、且使用感更優異。The toothbrush of the present invention has more excellent cleaning power and more excellent feeling in use.

[第1發明] 以下，參照圖1A及圖1B來說明第1發明的牙刷的實施形態。 圖1A及圖1B的牙刷1包括：於俯視下為大致四邊形的頭部2、延伸設置於該頭部2的頸部4、及延伸設置於該頸部4的柄部6（以下，亦將頭部2與頸部4及柄部6合起來稱為柄體10）。於所述頭部2中設置有植毛部（未圖示）。[First Invention] Hereinafter, an embodiment of the toothbrush of the first invention will be described with reference to FIGS. 1A and 1B. The toothbrush 1 of FIGS. 1A and 1B includes: a substantially quadrangular head 2 in a plan view, a neck 4 extending from the head 2, and a handle 6 extending from the neck 4 (hereinafter, also will The head 2 together with the neck 4 and the handle 6 are called the handle body 10). A hair transplanting part (not shown) is provided in the head 2.

柄體10是作為整體一體成形為長條狀者，例如為將樹脂作為材料並藉由射出成形所獲得者。 作為柄體的材質，可列舉：聚丙烯樹脂（Polypropylene，PP）、聚縮醛樹脂（聚甲醛（Polyoxymethylene，POM））、聚苯乙烯樹脂（Polystyrene，PS）、聚對苯二甲酸乙二酯樹脂（Polyethylene terephthalate，PET）、聚對苯二甲酸丁二酯樹脂（Polybutylene terephthalate，PBT）、丙烯腈-丁二烯-苯乙烯樹脂（Acrylonitrile Butadiene Styrene，ABS）、聚芳酯樹脂、聚碳酸酯樹脂、丙烯腈-苯乙烯樹脂（Acrylonitrile Styrene，AS）、聚酯樹脂（聚(1,4-伸環己基二亞甲基對苯二甲酸)（Poly(l,4-cyclohexylene dimethylene terephthalic acid)，PCTA））等。該些之中，就強度高、成形性優異的方面等而言，較佳為PP、POM、PBT，更佳為PP、POM。另外，就能夠以更低的成本進一步獲得本發明的效果的方面而言，柄體的材質特佳為PP。 所述樹脂可單獨使用一種，亦可將兩種以上組合使用。 柄體的材質的彎曲彈性係數較佳為1200 MPa～3000 MPa，更佳為1500 MPa～3000 MPa。若柄體的材質的彎曲彈性係數為所述範圍，則可將頭部的彎曲量設定成適當的值，並關係到口腔內的清掃力或操作性的提昇、使用者的使用感的提昇。再者，柄體的材質的彎曲彈性係數是依據日本工業標準（Japanese Industrial Standards，JIS）K7171來測定。 另外，柄體10的柄部6的一部分或全部可由軟質樹脂包覆。藉由柄部6的一部分或全部由軟質樹脂包覆，可進一步提高使用者握住柄部6時的握持性。作為所述軟質樹脂，例如可列舉：聚烯烴系彈性體、苯乙烯系彈性體、聚酯系彈性體、聚胺基甲酸酯系熱塑性彈性體等彈性體樹脂，矽樹脂等。The handle body 10 is one integrally molded into a long strip as a whole, for example, one obtained by injection molding using resin as a material. As the material of the handle body, there can be listed: polypropylene resin (Polypropylene, PP), polyacetal resin (Polyoxymethylene (POM)), polystyrene resin (Polystyrene, PS), polyethylene terephthalate Resin (Polyethylene terephthalate, PET), Polybutylene terephthalate (PBT), Acrylonitrile Butadiene Styrene (ABS), polyarylate resin, polycarbonate Resin, acrylonitrile-styrene resin (Acrylonitrile Styrene, AS), polyester resin (Poly(l,4-cyclohexylene dimethylene terephthalic acid), PCTA)) etc. Among these, in terms of high strength and excellent formability, PP, POM, and PBT are preferred, and PP and POM are more preferred. In addition, in terms of further obtaining the effects of the present invention at a lower cost, the material of the handle body is particularly preferably PP. The resin can be used alone or in combination of two or more. The bending elastic coefficient of the material of the handle body is preferably 1200 MPa to 3000 MPa, more preferably 1500 MPa to 3000 MPa. If the bending elastic modulus of the material of the handle body is in the above range, the bending amount of the head can be set to an appropriate value, and it is related to the improvement of cleaning power and operability in the oral cavity and the improvement of the user's feeling of use. Furthermore, the bending elastic modulus of the material of the handle body is measured in accordance with Japanese Industrial Standards (JIS) K7171. In addition, part or all of the shank 6 of the shank body 10 may be covered with a soft resin. By covering part or all of the handle 6 with soft resin, it is possible to further improve the grip of the handle 6 by the user. Examples of the soft resin include elastomer resins such as polyolefin-based elastomers, styrene-based elastomers, polyester-based elastomers, polyurethane-based thermoplastic elastomers, and silicone resins.

柄體10的長度L1可考慮操作性等來決定，例如設為150 mm～200 mm。The length L1 of the handle body 10 can be determined in consideration of operability and the like, and is set to, for example, 150 mm to 200 mm.

頭部2是將柄體10的長度方向作為長邊，於俯視下呈4個頂部由曲線來形成切角的大致四邊形的平板狀。於頭部2的一個面（植毛面20）上形成有多個植毛孔22。於該植毛孔22中植設將牙刷毛捆紮而成的毛束，形成包含多個毛束的植毛部。 再者，於本說明書中，所謂俯視，是指自頭部的植毛面側觀察牙刷。將與植毛面20平行且與柄體10的長度方向正交的方向設為寬度，將與植毛面20正交的方向設為厚度。此外，將面對植毛面20之側設為表面，將面對植毛面20之側的相反側設為背面。 於俯視下，頭部2隨著自前端9朝向頸部4，於寬度方向上擴大，其次以同等的寬度延伸，繼而於寬度方向上縮小，最後到達與頸部4的邊界P1。The head 2 has a substantially quadrilateral flat plate shape with four tops formed by curved corners in a plan view with the longitudinal direction of the shank 10 as the long side. A plurality of hair transplanting holes 22 are formed on one surface (flocking surface 20) of the head 2. The tufts formed by bundling toothbrush bristles are implanted in this tufting hole 22, and the tufting part containing a plurality of tufts is formed. In addition, in the present specification, the term "planar view" means that the toothbrush is viewed from the hair-implanted surface side of the head. The direction parallel to the flocking surface 20 and orthogonal to the longitudinal direction of the shank body 10 is defined as the width, and the direction orthogonal to the flocking surface 20 is defined as the thickness. In addition, the side facing the tufted surface 20 is referred to as the front surface, and the side opposite to the side facing the tufted surface 20 is referred to as the back surface. In a plan view, the head 2 expands in the width direction from the front end 9 toward the neck 4, then extends with the same width, then shrinks in the width direction, and finally reaches the boundary P1 with the neck 4.

於本實施形態中，邊界P1是頭部2的俯視形狀中的形成自頸部4起的切角的曲線的終點，即形成切角的曲線的彎曲方向變化的位置。即，頭部與頸部的邊界P1是自俯視下的頭部中的形成自頸部起的切角部分的寬度變小的兩邊緣的曲線或直線R1變化成寬度擴大的曲線或直線、或者寬度相同的直線的位置。另外，於在俯視下寬度隨著頸部朝向柄部而變大的牙刷的情況下，邊界P1與在俯視下頭部與頸部中的寬度最小的位置一致。 再者，例如存在如頭部與頸部以相同的寬度形成的牙刷般，難以特別規定所述邊界P1的位置的情況。於此情況下，相對於長度L1，將自柄體10的前端9起17.5%的位置（例如，當長度L1為180 mm時，自柄體10的前端9起31.5 mm的位置）設為邊界P1。In the present embodiment, the boundary P1 is the end point of the curve forming the chamfered corner from the neck 4 in the top view shape of the head 2, that is, the position where the curve direction of the chamfered curve changes. In other words, the boundary P1 between the head and the neck is a curve or straight line R1 with both edges of the head that forms a corner cut from the neck and changes into a curve or straight line with an enlarged width, or The position of lines of the same width. In addition, in the case of a toothbrush whose width increases as the neck portion goes toward the handle in a plan view, the boundary P1 coincides with the position where the width of the head and the neck is the smallest in a plan view. Furthermore, for example, like a toothbrush in which the head and neck are formed with the same width, it may be difficult to specify the position of the boundary P1. In this case, with respect to the length L1, a position of 17.5% from the front end 9 of the handle body 10 (for example, when the length L1 is 180 mm, a position of 31.5 mm from the front end 9 of the handle body 10) is set as the boundary P1.

頭部2的大小可考慮於口腔內的操作性等來決定。 頭部2的最大寬度W1若過大，則於口腔內的操作性下降，若過小，則進行植毛的毛束的數量變得過少，清掃力容易受損。因此，寬度W1例如設為5 mm～13 mm。 頭部2的厚度T1較佳為2.0 mm～4.0 mm，更佳為2.0 mm～3.5 mm，進而更佳為2.5 mm～3.2 mm。若厚度T1為所述下限值以上，則於頭部2中容易確保充分的強度。進而，容易於厚度方向上形成植毛孔22，容易將毛束牢固地植設於植毛孔22中且容易抑制毛束脫落。另外，若厚度T1為所述上限值以下，則可進一步提高牙刷1於口腔內的操作性。進而，可使牙刷毛到達臼齒的深處等口腔內的各個角落，可進一步提高口腔內的污垢去除效果。 再者，當頭部2的厚度不固定時，T1表示頭部2的最小的厚度。 頭部2的長度L2若過長，則於口腔內的操作性容易受損，若過短，則進行植毛的毛束的數量變得過少，清掃效果容易受損。因此，長度L2例如於10 mm～40 mm的範圍內適宜決定。The size of the head 2 can be determined in consideration of operability in the oral cavity and the like. If the maximum width W1 of the head 2 is too large, the operability in the oral cavity will be reduced, and if it is too small, the number of tufts for hair transplantation will be too small, and the cleaning power will be easily impaired. Therefore, the width W1 is set to, for example, 5 mm to 13 mm. The thickness T1 of the head 2 is preferably 2.0 mm to 4.0 mm, more preferably 2.0 mm to 3.5 mm, and still more preferably 2.5 mm to 3.2 mm. If the thickness T1 is greater than or equal to the lower limit, it is easy to ensure sufficient strength in the head 2. Furthermore, it is easy to form the tufting holes 22 in the thickness direction, it is easy to firmly implant the tufts in the tufting holes 22, and it is easy to suppress the hair tufts from falling out. In addition, if the thickness T1 is equal to or less than the upper limit, the handleability of the toothbrush 1 in the oral cavity can be further improved. Furthermore, the toothbrush bristles can reach every corner of the oral cavity such as the depths of the molars, and the effect of removing dirt in the oral cavity can be further improved. Furthermore, when the thickness of the head 2 is not fixed, T1 represents the minimum thickness of the head 2. If the length L2 of the head 2 is too long, the operability in the oral cavity is likely to be impaired, and if it is too short, the number of tufts to be transplanted becomes too small, and the cleaning effect is likely to be impaired. Therefore, the length L2 is appropriately determined, for example, in the range of 10 mm to 40 mm.

植毛孔22的形狀並無特別限定，可列舉：正圓或橢圓等圓形、三角形或四邊形等多邊形等。 植毛孔22的數量並無特別限定，例如設為10～60。 植毛孔22的直徑對應於所要求的毛束的粗度來決定，例如設為1 mm～3 mm。 植毛孔22的排列圖案並無特別限定，可為所謂的網格狀或鋸齒狀等任何排列圖案。The shape of the tuft hole 22 is not particularly limited, and examples thereof include a circle such as a perfect circle or an ellipse, and a polygon such as a triangle or a quadrilateral. The number of tuft holes 22 is not particularly limited, and is set to 10-60, for example. The diameter of the tuft hole 22 is determined in accordance with the required thickness of the hair bundle, and is set to, for example, 1 mm to 3 mm. The arrangement pattern of the tuft holes 22 is not particularly limited, and may be any arrangement pattern such as a so-called grid shape or a zigzag shape.

作為構成毛束的牙刷毛，可列舉：其直徑朝向毛尖逐漸變小的牙刷毛（錐形毛），除毛尖的圓形部分以外外徑大致相同的牙刷毛（直毛），毛尖變成篦狀、球狀、前端分裂狀等形狀的牙刷毛。 作為牙刷毛，較佳為錐形毛。藉由將牙刷毛設為錐形毛，可提高牙周袋等的污垢去除效果。進而，可提高牙齦的按摩效果，且使用感進一步提昇。Examples of toothbrush bristles constituting the tufts include: toothbrush bristles (tapered bristles) whose diameter gradually becomes smaller toward the tip of the bristles, toothbrush bristles (straight bristles) with approximately the same outer diameter except for the round part of the tip, and the tip of the bristles becomes a grate , Spherical, split-end toothbrush bristles. The toothbrush bristles are preferably tapered bristles. By setting the toothbrush bristles into tapered bristles, the effect of removing dirt from periodontal pockets can be improved. Furthermore, the massage effect of the gums can be improved, and the feeling of use can be further improved.

作為牙刷毛的材質，例如可列舉：6-12尼龍、6-10尼龍等聚醯胺，PET、PBT、聚對苯二甲酸丙二酯（Polytrimethylene terephthalate，PTT）、聚萘二甲酸乙二酯（Polyethylene naphthalate，PEN）、聚萘二甲酸丁二酯（Polybutylene naphthalate，PBN）等聚酯，聚丙烯等聚烯烴，烯烴系彈性體、苯乙烯系彈性體等合成樹脂材料。該些樹脂材料可單獨使用一種，亦可將兩種以上組合使用。 另外，牙刷毛亦可為具有芯部與設置於該芯部的外側的至少1層以上的鞘部的多重芯結構。Examples of the material of the toothbrush bristles include polyamides such as 6-12 nylon and 6-10 nylon, PET, PBT, polytrimethylene terephthalate (PTT), and polyethylene naphthalate. (Polyethylene naphthalate, PEN), Polybutylene naphthalate (PBN) and other polyesters, polypropylene and other polyolefins, olefin-based elastomers, styrene-based elastomers and other synthetic resin materials. One kind of these resin materials may be used alone, or two or more kinds may be used in combination. In addition, the toothbrush bristles may have a multiple core structure having a core and at least one or more sheaths provided on the outside of the core.

牙刷毛的橫剖面形狀較佳為正圓形，但未必限定於正圓形，可對應於牙刷1的目的用途而設為任意的形狀。例如可設為橢圓形、多邊形（例如三角形、四邊形、五邊形、六邊形等）、異形（例如星形、三葉的三葉草形、四葉的三葉草形等）等。The cross-sectional shape of the toothbrush bristles is preferably a perfect circle, but it is not necessarily limited to a perfect circle, and can be set to any shape corresponding to the intended use of the toothbrush 1. For example, it can be an ellipse, a polygon (for example, a triangle, a quadrilateral, a pentagon, a hexagon, etc.), a special shape (for example, a star shape, a three-leaf clover shape, a four-leaf clover shape, etc.).

各牙刷毛的粗度並無特別限定，例如於橫剖面為正圓形的情況下，較佳為4 mil～8 mil（1 mil＝1/1000 inch＝0.025 mm）。若為所述下限值以上，則自立性提昇且清掃性進一步變高，若為所述上限值以下，則毛束11的毛硬變得適度，接觸感變得更良好。 構成毛束11的牙刷毛可全部為相同的粗度，亦可將兩種以上的粗度不同的牙刷毛加以組合。The thickness of each toothbrush bristles is not particularly limited. For example, when the cross section is a perfect circle, it is preferably 4 mil to 8 mil (1 mil=1/1000 inch=0.025 mm). If it is more than the said lower limit value, the self-standing property will improve and cleaning property will become higher, and if it is less than the said upper limit value, the hairiness of the hair|bristle bundle 11 will become moderate, and the touch feeling will become more favorable. The toothbrush bristles constituting the bristle bundle 11 may all have the same thickness, or two or more kinds of toothbrush bristles with different thicknesses may be combined.

牙刷毛的毛長例如大人用的牙刷毛較佳為設為8 mm～15 mm，兒童用的牙刷毛較佳為設為6 mm～12 mm。另外，就口腔內的使用性或使用感的方面而言，較佳為所選擇的牙刷毛的直徑越小，越縮短牙刷毛的毛長。另外，亦可對應於使用感或刷掃感、清掃效果、耐久性等目的，將粗度不同的多根牙刷毛組合使用。The hair length of the toothbrush bristles, for example, the toothbrush bristles for adults is preferably set to 8 mm to 15 mm, and the toothbrush bristles for children are preferably set to 6 mm to 12 mm. In addition, in terms of usability and usability in the oral cavity, it is preferable that the smaller the diameter of the selected toothbrush bristles, the shorter the hair length of the toothbrush bristles. In addition, it is also possible to combine a plurality of toothbrush bristles with different thicknesses in accordance with the purpose of the usability, the brushing feeling, the cleaning effect, the durability, and the like.

頸部4是將頭部2與柄部6連接者。 於本實施形態中，頸部4自邊界P1朝向柄部6以大致相同的直徑延伸，繼而進行擴徑，最後到達與柄部6的邊界P2。所述邊界P2是頸部4的擴徑的終點，即，於俯視下，形成加寬的部分的兩邊緣的直線的終點或形成加寬的部分的兩邊緣的曲線的彎曲方向變化的位置。若為圖1A，則頸部與柄部的邊界P2是於俯視下，自頸部中的形成寬度變大的部分的兩邊緣的直線或曲線R2變化成寬度逐漸地變小的曲線的位置。 再者，存在如頸部與柄部以相同的寬度形成的牙刷般，難以特別規定所述邊界P2的位置的情況。於此情況下，相對於長度L1，將自柄體10的前端9起42.2%的位置（例如，當長度L1為180 mm時，自柄體10的前端9起76.0 mm的位置）設為邊界P2。The neck 4 connects the head 2 and the handle 6. In the present embodiment, the neck 4 extends from the boundary P1 toward the shank 6 with approximately the same diameter, and then expands the diameter, and finally reaches the boundary P2 with the shank 6. The boundary P2 is the end point of the enlarged diameter of the neck 4, that is, the end point of the straight line forming the two edges of the widened part or the position where the bending direction of the curve forming the two edges of the widened part changes. In FIG. 1A, the boundary P2 between the neck and the shank is a position where the straight line or curve R2 that forms the two edges of the portion with a larger width in the neck changes to a curve with a gradually smaller width when viewed from above. In addition, like a toothbrush in which the neck and the handle are formed with the same width, it may be difficult to specify the position of the boundary P2. In this case, with respect to the length L1, the position 42.2% from the front end 9 of the shank body 10 (for example, when the length L1 is 180 mm, the position 76.0 mm from the front end 9 of the shank body 10) is set as the boundary P2.

頸部4的寬度W2較佳為3.0 mm～4.5 mm，更佳為3.0 mm～4.2 mm。若寬度W2為所述下限值以上，則就耐折等的方面而言，於頸部4中容易確保充分的強度。進而，牙刷1不會變得過於鬆軟，容易獲得由適度的彎曲所產生的良好的使用感。另外，若寬度W2為所述上限值以下，則可提高牙刷1於口腔內的操作性。進而，可使牙刷毛到達口腔內的各個角落，可進一步提高口腔內的污垢去除效果。 再者，當頸部4的寬度不固定時，寬度W2表示頸部4的最小的寬度。The width W2 of the neck 4 is preferably 3.0 mm to 4.5 mm, more preferably 3.0 mm to 4.2 mm. If the width W2 is greater than or equal to the lower limit, it is easy to ensure sufficient strength in the neck 4 in terms of folding resistance and the like. Furthermore, the toothbrush 1 does not become too soft, and it is easy to obtain a good usability due to moderate bending. In addition, if the width W2 is equal to or less than the upper limit, the operability of the toothbrush 1 in the oral cavity can be improved. Furthermore, the toothbrush bristles can reach every corner of the oral cavity, and the dirt removal effect in the oral cavity can be further improved. Furthermore, when the width of the neck 4 is not fixed, the width W2 represents the smallest width of the neck 4.

頸部4的厚度T2較佳為3.0 mm～4.5 mm，更佳為3.0 mm～4.2 mm。若厚度T2為所述下限值以上，則就耐折等的方面而言，於頸部4中容易確保充分的強度。進而，牙刷1不會變得過於鬆軟，容易獲得由適度的彎曲所產生的良好的使用感。另外，若厚度T2為所述上限值以下，則可提高牙刷1於口腔內的操作性。進而，可使牙刷毛到達口腔內的各個角落，可進一步提高口腔內的污垢去除效果。 再者，當頸部4的厚度不固定時，厚度T2表示頸部4的最小的厚度。The thickness T2 of the neck 4 is preferably 3.0 mm to 4.5 mm, more preferably 3.0 mm to 4.2 mm. If the thickness T2 is greater than or equal to the lower limit, it is easy to ensure sufficient strength in the neck 4 in terms of folding resistance and the like. Furthermore, the toothbrush 1 does not become too soft, and it is easy to obtain a good usability due to moderate bending. In addition, if the thickness T2 is equal to or less than the upper limit, the handleability of the toothbrush 1 in the oral cavity can be improved. Furthermore, the toothbrush bristles can reach every corner of the oral cavity, and the dirt removal effect in the oral cavity can be further improved. Furthermore, when the thickness of the neck 4 is not fixed, the thickness T2 represents the minimum thickness of the neck 4.

頸部4的最小直徑較佳為3.0 mm～4.5 mm，更佳為3.0 mm～4.2 mm。若頸部4的最小直徑為所述下限值以上，則就耐折等的方面而言，於頸部4中容易確保充分的強度。進而，牙刷1不會變得過於鬆軟，容易獲得由適度的彎曲所產生的良好的使用感。另外，若頸部4的最小直徑為所述上限值以下，則可提高牙刷1於口腔內的操作性。進而，可使牙刷毛到達口腔內的各個角落，可進一步提高口腔內的污垢去除效果。 再者，頸部4的最小直徑表示所述寬度W2與厚度T2中的小的一方的值，即頸部4的最小的寬度與最小的厚度中的小的一方。於頸部中，更佳為最小的厚度與最小的寬度相同，或最小的寬度比最小的厚度小、且最小的寬度為3.0 mm～4.5 mm。The minimum diameter of the neck 4 is preferably 3.0 mm to 4.5 mm, more preferably 3.0 mm to 4.2 mm. If the minimum diameter of the neck part 4 is more than the said lower limit, it will become easy to ensure sufficient strength in the neck part 4 in terms of folding resistance and the like. Furthermore, the toothbrush 1 does not become too soft, and it is easy to obtain a good usability due to moderate bending. Moreover, if the minimum diameter of the neck part 4 is below the said upper limit, the handleability of the toothbrush 1 in the oral cavity can be improved. Furthermore, the toothbrush bristles can reach every corner of the oral cavity, and the dirt removal effect in the oral cavity can be further improved. In addition, the minimum diameter of the neck 4 indicates the smaller of the width W2 and the thickness T2, that is, the smaller of the smallest width and the smallest thickness of the neck 4. In the neck, it is more preferable that the smallest thickness is the same as the smallest width, or the smallest width is smaller than the smallest thickness, and the smallest width is 3.0 mm to 4.5 mm.

頸部4的長度L3可考慮頭部的長度L2等來決定，例如為達到30 mm～90 mm的長度，更佳為30 mm～60 mm。若長度L3為所述下限值以上，則容易使牙刷毛到達口腔內的各個角落，可進一步提高口腔內的污垢去除效果。若長度L3為所述上限值以下，則可進一步提高牙刷1於口腔內的操作性。The length L3 of the neck 4 can be determined in consideration of the length L2 of the head, etc., for example, a length of 30 mm to 90 mm, and more preferably 30 mm to 60 mm. If the length L3 is greater than or equal to the lower limit, the toothbrush bristles can easily reach every corner of the oral cavity, and the effect of removing dirt in the oral cavity can be further improved. If the length L3 is less than or equal to the upper limit, the operability of the toothbrush 1 in the oral cavity can be further improved.

（頭部2的彎曲量A） 頭部的彎曲量A藉由以下的方法（α）來測定。 方法（α）： 使頭部的植毛面朝向鉛垂方向的上方，以將牙刷的頭部與頸部的邊界P1的位置固定的狀態下的柄體的前端的高度為基準高度。進而，於將所述邊界P1的位置固定的狀態下，相對於頭部中的植毛部的長軸方向的長度，於自植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的柄體的前端的自基準高度起的高度的位移量（單位為mm）設為頭部的彎曲量A。 再者，所謂「植毛部的長軸方向的長度」，是指俯視頭部時的位於最前端側的植毛孔的前端與位於最後端側的植毛孔的後端的距離。 例如，當於俯視下頸部的自頭部起的部分的寬度相同時，於所述頸部的自頭部起的部分中，一面朝向頭部緩慢地改變位置一面測定寬度，並將寬度相同的部分與寬度開始變大的部分的轉折點的位置設為邊界P1。另外，當於俯視下頸部的自頭部起的部分的寬度隨著接近頭部而變小時，於頸部的自頭部起的部分中，一面朝向頭部緩慢地改變位置一面測定寬度，並將寬度變成最小的位置設為邊界P1。(Bending amount A of head 2) The bending amount A of the head is measured by the following method (α). Method (α): The tufted surface of the head is directed upward in the vertical direction, and the height of the tip of the handle in a state where the position of the boundary P1 between the head and the neck of the toothbrush is fixed is the reference height. Furthermore, in a state where the position of the boundary P1 is fixed, a weight of 200 g is suspended at a position of 10±3% from the tip of the hair transplanting part relative to the length of the hair transplanting part in the head in the long axis direction , And the amount of displacement (in mm) of the height of the tip of the handle body from the reference height after 10 seconds is set as the bending amount A of the head. In addition, the term "length in the longitudinal direction of the tuft portion" refers to the distance between the front end of the tuft hole located on the most distal end side and the rear end of the tuft hole located on the rearmost end side when the head is viewed from above. For example, when the width of the part from the head of the neck is the same when viewed from above, in the part of the neck from the head, the width is measured while slowly changing the position toward the head, and the width is the same The position of the turning point between the part of and the part where the width starts to increase is set as the boundary P1. In addition, when the width of the portion of the neck from the head in a plan view becomes smaller as it approaches the head, in the portion of the neck from the head, the width is measured while slowly changing the position toward the head. And the position where the width becomes the smallest is set as the boundary P1.

於本發明中，頭部2的彎曲量A如以下般進行測定。 如圖2A所示，使牙刷1變成植毛面20朝上並於頸部最細部的位置（邊界P1）上使用夾具100進行固定。此時，將柄體10的前端9的高度設為基準高度H0 。 繼而，如圖2B所示，將200 g的秤錘102懸掛於S的位置上，測定10秒後的柄體10的前端9的高度，並將其高度設為H1 。所述S是相對於植毛部長軸方向，自植毛部前端起10±3%的位置。例如當植毛部為19 mm時，S為自該前端起2.0 mm的位置。 繼而，將H1 與H0 的差的絕對值作為a（單位為mm）來求出。所述a例如藉由高度規（height gauge）等來測定。測定是於室溫25±3℃下進行。 進行5次所述測定，並將所述a的平均值設為頭部2的彎曲量A。In the present invention, the bending amount A of the head 2 is measured as follows. As shown in FIG. 2A, the toothbrush 1 is turned into a hair-implanted surface 20 facing upwards and is fixed at the position (boundary P1) of the thinnest part of the neck using a jig 100. At this time, the height of the front end 9 of the handle body 10 is set as the reference height H 0 . Next, as shown in FIG. 2B, a weight 102 of 200 g is hung at the position of S, and the height of the front end 9 of the handle body 10 after 10 seconds is measured, and the height is set to H 1 . The S is a position of 10±3% from the front end of the hair transplant part with respect to the long axis direction of the hair transplant. For example, when the tufting portion is 19 mm, S is a position of 2.0 mm from the tip. Then, the absolute value of the difference between H 1 and H 0 is determined as a (unit: mm). The a is measured by a height gauge or the like, for example. The measurement is carried out at room temperature 25±3°C. The measurement is performed 5 times, and the average value of the a is set as the bending amount A of the head 2.

彎曲量A較佳為0.4～3.0，更佳為0.4～2.5，進而更佳為0.4～2.0。另外，彎曲量A較佳為0.5～3.0，更佳為0.5～2.5，進而更佳為0.5～2.0。若彎曲量A為所述範圍，則頭部2本身適度地彎曲，植設於頭部2中的植毛部的柔韌性顯現且對於牙齦的接觸感，即使用感變得更良好。另外，若彎曲量A為所述下限值以上，則使用感變得良好。若彎曲量A為所述上限值以下，則於頭部2中容易確保充分的強度。進而，牙刷1不會變得過於鬆軟，容易獲得良好的口腔內操作性、清掃力。 再者，彎曲量A是藉由調整頭部2的材質（即柄體10的材質）的彎曲彈性係數或頭部2的厚度、寬度等來調整。The bending amount A is preferably 0.4 to 3.0, more preferably 0.4 to 2.5, and still more preferably 0.4 to 2.0. In addition, the bending amount A is preferably 0.5 to 3.0, more preferably 0.5 to 2.5, and still more preferably 0.5 to 2.0. If the bending amount A is in the above-mentioned range, the head 2 itself is appropriately bent, the flexibility of the hair graft part implanted in the head 2 appears, and the touch feeling to the gums, that is, the feeling of use becomes better. In addition, when the bending amount A is equal to or more than the lower limit, the feeling in use becomes good. If the bending amount A is equal to or less than the upper limit, it is easy to ensure sufficient strength in the head 2. Furthermore, the toothbrush 1 does not become too soft, and it is easy to obtain good oral operability and cleaning power. Furthermore, the bending amount A is adjusted by adjusting the bending elastic coefficient of the material of the head 2 (that is, the material of the handle body 10), or the thickness, width, etc. of the head 2.

（頸部4的彎曲量B） 頸部的彎曲量B藉由以下的方法（β）來測定。 方法（β）： 使頭部的植毛面朝向鉛垂方向的上方，以將牙刷的頸部與柄部的邊界的位置固定的狀態下的柄體的前端的高度為基準高度。於所述固定狀態下，進而相對於頭部中的植毛部的長軸方向的長度，於自植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為頸部的彎曲量B。(Bending amount of neck 4) The bending amount B of the neck is measured by the following method (β). Method (β): The tufted surface of the head is directed upward in the vertical direction, and the height of the front end of the handle body in a state where the position of the boundary between the neck of the toothbrush and the handle is fixed is the reference height. In the fixed state, with respect to the length of the hair transplanting part in the long axis direction of the head, a 200 g weight is suspended at a position 50±3% from the tip of the hair transplanting part, and the weight after 10 seconds The amount of displacement (in mm) of the height of the front end of the handle body from the reference height is defined as the amount of bending B of the neck.

於本發明中，除利用夾具100固定牙刷1的位置（邊界P1）、及懸掛秤錘102的位置S與頭部2的彎曲量A的測定方法不同以外，與頭部2的彎曲量A同樣地測定頸部4的彎曲量B。 於頸部4的彎曲量B的測定中，利用夾具100固定牙刷1的位置為邊界P2。另外，S是相對於植毛部的長軸方向的長度，自植毛部前端起50±3%的位置。例如當植毛部為19 mm時，S為自前端起9.5 mm的位置。 而且，與頭部2的彎曲量A的測定方法同樣地求出懸掛秤錘102前的基準高度H0 與懸掛秤錘102並經過10秒後的高度H1 的差的絕對值（單位為mm）。測定是於室溫25±3℃下進行。進行5次該測定，並將其平均值設為頸部4的彎曲量B。In the present invention, it is the same as the bending amount A of the head 2 except that the position (boundary P1) of the toothbrush 1 is fixed by the jig 100 and the measurement method of the position S of the hanging weight 102 and the bending amount A of the head 2 is different. The bending amount B of the neck 4 is measured accordingly. In the measurement of the bending amount B of the neck 4, the position where the toothbrush 1 is fixed by the jig 100 is the boundary P2. In addition, S is the position of 50±3% from the tip of the hair transplant part with respect to the length of the hair transplant part in the long axis direction. For example, when the tufting part is 19 mm, S is the position of 9.5 mm from the front end. In addition, the absolute value of the difference between the reference height H 0 before hanging the weight 102 and the height H 1 after 10 seconds has elapsed (unit: mm ). The measurement is carried out at room temperature 25±3°C. This measurement is performed 5 times, and the average value thereof is defined as the bending amount B of the neck 4.

彎曲量B較佳為2.1～5.0，更佳為2.3～4.5，進而更佳為2.5～4.0。若彎曲量B為所述範圍，則頸部4適度地彎曲，適度的緩衝性顯現，植毛部對於牙齦的接觸感變得更良好。另外，若彎曲量B為所述下限值以上，則可使牙刷毛到達臼齒的深處等口腔內的各個角落，可進一步提高口腔內的清掃力。進而，牙刷毛朝牙周袋中的進入性提昇，可進一步提高牙周袋的清掃力。若彎曲量B為所述上限值以下，則於頸部4中容易確保充分的強度。進而，牙刷1不會變得過於鬆軟，容易獲得良好的使用感。 再者，彎曲量B是藉由調整頸部4的材質（即柄體10的材質）的彎曲彈性係數或頸部的最小直徑、邊界P2的剖面形狀等來調整。The bending amount B is preferably 2.1 to 5.0, more preferably 2.3 to 4.5, and still more preferably 2.5 to 4.0. When the bending amount B is in the above-mentioned range, the neck 4 is appropriately bent, a moderate cushioning property appears, and the touch feeling of the hair transplantation part with respect to the gums becomes better. In addition, if the bending amount B is more than the above-mentioned lower limit value, the toothbrush bristles can reach every corner of the oral cavity such as the depths of the molar teeth, and the cleaning force in the oral cavity can be further improved. Furthermore, the penetration of the toothbrush bristles into the periodontal pocket is improved, and the cleaning power of the periodontal pocket can be further improved. If the bending amount B is equal to or less than the upper limit, it is easy to ensure sufficient strength in the neck 4. Furthermore, the toothbrush 1 does not become too soft, and it is easy to obtain a good feeling in use. Furthermore, the bending amount B is adjusted by adjusting the bending elastic coefficient of the material of the neck 4 (that is, the material of the handle body 10), the minimum diameter of the neck, the cross-sectional shape of the boundary P2, and the like.

頭部的彎曲量A與頸部的彎曲量B的積（A×B）為0.8～10，更佳為1～10，進而佳為1～6，進而更佳為1～3.5。另外，（A×B）較佳為2～10。若（A×B）為所述範圍，則可獲得頭部2與頸部4協調的適度的彎曲。藉此，當使植毛部相對於清掃對象部位（牙齒、牙齦等）滑動時，植毛部的柔韌性與緩衝性顯現，植毛部的接觸感變得良好。另外，（A×B）的下限值為0.8以上，較佳為1以上。另外，較佳為2以上。藉由（A×B）為所述下限值以上，可獲得適度的彎曲，藉此對於牙齦的接觸感良好，且對於牙齦可獲得高按摩效果，使用感提昇。（A×B）的上限值為10以下，較佳為6以下，更佳為3.5以下。藉由（A×B）為所述上限值以下，可抑制由頭部2與頸部4所形成的區域過度彎曲，而導致操作性下降且清掃力下降的情況。另外，可抑制由所述過度彎曲所引起的對於牙齦的按摩效果下降、或使用者使用牙刷1時感覺到鬆軟的情況。進而，可提高牙刷1的強度且耐久性提昇。The product (A×B) of the bending amount A of the head and the bending amount B of the neck is 0.8 to 10, more preferably 1 to 10, still more preferably 1 to 6, and still more preferably 1 to 3.5. In addition, (A×B) is preferably 2-10. If (A×B) is in the above-mentioned range, a moderate bending of the head 2 and the neck 4 can be obtained. Thereby, when the hair transplantation part is slid relative to the cleaning target site (teeth, gums, etc.), the flexibility and cushioning properties of the hair transplantation part appear, and the contact feeling of the hair transplantation part becomes good. In addition, the lower limit of (A×B) is 0.8 or more, preferably 1 or more. In addition, it is preferably 2 or more. When (A×B) is more than the lower limit value, a moderate bending can be obtained, whereby a good contact feeling to the gums can be obtained, and a high massage effect can be obtained for the gums, and the feeling of use can be improved. The upper limit of (A×B) is 10 or less, preferably 6 or less, and more preferably 3.5 or less. When (A×B) is equal to or less than the upper limit value, it is possible to prevent the area formed by the head 2 and the neck 4 from being excessively bent, resulting in a decrease in operability and a decrease in cleaning power. In addition, it is possible to suppress the decrease in the massage effect on the gums caused by the excessive bending, or the user's feeling of softness when using the toothbrush 1. Furthermore, the strength of the toothbrush 1 can be improved, and durability can be improved.

彎曲量A與彎曲量B較佳為A＜B。若為A＜B，則可進一步提高牙刷1的操作性。 另外，彎曲量A與彎曲量B的差（B－A）較佳為1以上，更佳為1.5以上，進而更佳為2以上。若（B－A）為所述下限值以上，則相對於頭部2，將頸部4的彎曲量保持得大，可提高緩衝性且對於牙齦的接觸感變得良好，使用者容易確實感覺到對於牙齦的按摩效果。 另外，（B－A）較佳為4以下，更佳為3以下。若（B－A）為所述上限值以下，則相對於頭部2，頸部4的彎曲量不會變得過大，容易提高於口腔內的操作性。進而，容易抑制使用者使用牙刷1時感覺到鬆軟的情況。 （B－A）較佳為1～4，更佳為1～3。 另外，彎曲量B與彎曲量A的比（B/A）較佳為1.5～5.0，更佳為1.8～4.8。The bending amount A and the bending amount B are preferably A<B. If A<B, the operability of the toothbrush 1 can be further improved. In addition, the difference (B-A) between the bending amount A and the bending amount B is preferably 1 or more, more preferably 1.5 or more, and still more preferably 2 or more. If (B-A) is more than the above lower limit value, the bending amount of the neck 4 is kept large relative to the head 2, the cushioning property can be improved, and the contact feeling to the gums becomes good, and the user is easy to be sure Feel the massage effect on the gums. In addition, (B-A) is preferably 4 or less, more preferably 3 or less. If (B-A) is less than or equal to the above upper limit, the amount of curvature of the neck 4 with respect to the head 2 does not become too large, and it is easy to improve the operability in the oral cavity. Furthermore, it is easy to prevent the user from feeling soft when using the toothbrush 1. (B-A) Preferably it is 1-4, More preferably, it is 1-3. In addition, the ratio (B/A) of the bending amount B to the bending amount A is preferably from 1.5 to 5.0, more preferably from 1.8 to 4.8.

（頭部2的彎曲量A'） 頭部的彎曲量A'藉由以下的方法（α'）來測定。 方法（α'）： 使頭部的植毛面朝向鉛垂方向的上方，以將自牙刷中的頭部與頸部的邊界的位置朝柄部側移動10 mm的位置固定的狀態下的柄體的前端的高度為基準高度。於所述固定狀態下，進而相對於頭部中的植毛部的長軸方向的長度，於自植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A'。(Bending amount A'of head 2) The bending amount A'of the head is measured by the following method (α'). Method (α'): The head's grafting surface is directed upward in the vertical direction, and the height of the front end of the handle body in a fixed state with the position of the border between the head and the neck of the toothbrush moved 10 mm to the handle side is used as the reference high. In the fixed state, with respect to the length of the hair transplanting part in the head in the long axis direction, hang a 200 g weight at a position 10±3% from the tip of the hair transplanting part, and set the weight after 10 seconds The amount of displacement (in mm) of the height of the front end of the handle body from the reference height is set as the bending amount A′ of the head.

於本發明中，除利用夾具100固定牙刷1的位置（邊界P1）與頭部2的彎曲量A的測定方法不同以外，與頭部2的彎曲量A同樣地測定頭部2的彎曲量A'。 於頭部2的彎曲量A'的測定中，利用夾具100固定牙刷1的位置為於長軸方向上自邊界P1的位置朝柄部側移動10 mm的位置P3。 而且，與頭部2的彎曲量A的測定方法同樣地測定懸掛秤錘102前的基準高度H0 與懸掛秤錘102並經過10秒後的高度H1 的差的絕對值（單位為mm）。測定是於室溫25±3℃下進行。進行5次該測定，並將其平均值設為頭部2的彎曲量A'。In the present invention, except that the position (boundary P1) of the toothbrush 1 is fixed by the jig 100 and the method of measuring the bending amount A of the head 2 is different, the bending amount A of the head 2 is measured in the same manner as the bending amount A of the head 2 '. In the measurement of the bending amount A′ of the head 2, the position where the toothbrush 1 is fixed by the jig 100 is the position P3 moved 10 mm from the position of the boundary P1 to the handle side in the long axis direction. In addition, the absolute value of the difference between the reference height H 0 before hanging the weight 102 and the height H 1 after 10 seconds has elapsed (unit: mm) is measured in the same manner as the method for measuring the bending amount A of the head 2 . The measurement is carried out at room temperature 25±3°C. This measurement is performed 5 times, and the average value thereof is defined as the bending amount A′ of the head 2.

彎曲量A'較佳為1～5，更佳為1～4，進而更佳為1～3。若彎曲量A'為所述範圍，則頭部2本身適度地彎曲，植設於頭部2中的植毛部的柔韌性顯現且對於牙齦的接觸感，即使用感變得更良好。另外，若彎曲量A'為所述下限值以上，則使用感變得良好。若彎曲量A'為所述上限值以下，則於頭部2中容易確保充分的強度。進而，牙刷1不會變得過於鬆軟，容易獲得良好的口腔內操作性、清掃力。 再者，彎曲量A'是藉由調整頭部2的材質（即柄體10的材質）的彎曲彈性係數或頭部2的厚度、寬度等來調整。The bending amount A'is preferably 1-5, more preferably 1-4, and still more preferably 1-3. If the bending amount A'is in the above range, the head 2 itself is appropriately bent, the flexibility of the hair transplantation part implanted in the head 2 appears, and the touch feeling to the gums, that is, the feeling of use becomes better. In addition, when the bending amount A'is equal to or more than the lower limit, the feeling in use becomes good. If the bending amount A'is equal to or less than the upper limit, it is easy to ensure sufficient strength in the head 2. Furthermore, the toothbrush 1 does not become too soft, and it is easy to obtain good oral operability and cleaning power. Furthermore, the bending amount A′ is adjusted by adjusting the bending elastic coefficient of the material of the head 2 (that is, the material of the handle body 10) or the thickness, width, etc. of the head 2.

頭部的彎曲量A'與頸部的彎曲量B的積（A'×B）較佳為2.5～12，更佳為3～12，進而佳為3～10，進而更佳為3～7。若（A'×B）為所述範圍，則容易獲得頭部2與頸部4協調的適度的彎曲。藉此，當使植毛部相對於清掃對象部位（牙齒、牙齦等）滑動時，植毛部的柔韌性與緩衝性顯現，植毛部的接觸感變得更良好。另外，（A'×B）為2.5以上，較佳為3以上。藉由（A'×B）為所述下限值以上，可獲得適度的彎曲，藉此對於牙齦的接觸感更良好，且對於牙齦可獲得更高的按摩效果，使用感進一步提昇。（A'×B）為12以下，較佳為10以下，更佳為7以下。藉由（A'×B）為所述上限值以下，容易抑制由頭部2與頸部4所形成的區域過度彎曲，而導致操作性下降且清掃力下降的情況。另外，可抑制由所述過度彎曲所引起的對於牙齦的按摩效果下降、或使用者使用牙刷1時感覺到鬆軟的情況。進而，可提高牙刷1的強度且耐久性進一步提昇。The product (A'×B) of the bending amount A'of the head and the bending amount B of the neck is preferably 2.5-12, more preferably 3-12, still more preferably 3-10, and still more preferably 3-7 . If (A′×B) is in the above-mentioned range, it is easy to obtain a moderate bending of the head 2 and the neck 4 in harmony. Thereby, when the hair transplantation part is slid relative to the cleaning target part (teeth, gums, etc.), the flexibility and cushioning properties of the hair transplantation part appear, and the contact feeling of the hair transplantation part becomes better. In addition, (A'×B) is 2.5 or more, preferably 3 or more. When (A'×B) is more than the lower limit value, a moderate bending can be obtained, whereby the contact feeling to the gums is better, and a higher massage effect can be obtained for the gums, and the feeling of use is further improved. (A'×B) is 12 or less, preferably 10 or less, more preferably 7 or less. When (A'×B) is equal to or less than the upper limit, it is easy to suppress the excessive bending of the area formed by the head 2 and the neck 4, which may result in a decrease in operability and a decrease in cleaning power. In addition, it is possible to suppress the decrease in the massage effect on the gums caused by the excessive bending, or the user's feeling of softness when using the toothbrush 1. Furthermore, the strength of the toothbrush 1 can be improved and the durability can be further improved.

另外，彎曲量B與彎曲量A'的比（B/A'）較佳為0.8～2.5，更佳為0.9～2.0。In addition, the ratio (B/A') of the bending amount B to the bending amount A'is preferably 0.8 to 2.5, more preferably 0.9 to 2.0.

（牙刷毛的毛尖強度） 構成毛束的牙刷毛的毛尖強度如以下般進行測定。 作為測定裝置，使用ISO毛硬強度試驗機。圖3中所示的ISO毛硬強度試驗機200具備基準面202與配置於基準面上的梯狀物（ladder）204。所述梯狀物204具備多根圓柱狀的棒狀體（不鏽鋼製，直徑：3 mm）。所述棒狀體相互平行地以固定間隔（棒狀體的中心彼此為10 mm間隔）進行排列。 首先，將牙刷1設置於所述試驗機200上。此時，使植設於牙刷1的頭部2中的牙刷毛的前端接觸所述試驗機200的基準面202。而且，求出使頭部2相對於所述基準面202水平地滑動時的最大阻力值，並將其設為牙刷毛的毛尖強度。頭部2的滑動方向是牙刷1的長邊方向與所述棒狀體的長邊方向變得相互垂直的方向。將頭部2的滑動速度設為10 mm/min。(The strength of the tip of the toothbrush bristles) The tip strength of the toothbrush bristles constituting the bristle bundle is measured as follows. As a measuring device, an ISO roughness tester was used. The ISO roughness tester 200 shown in FIG. 3 includes a reference surface 202 and a ladder 204 arranged on the reference surface. The ladder 204 includes a plurality of cylindrical rod-shaped bodies (made of stainless steel, diameter: 3 mm). The rod-shaped bodies are arranged in parallel with each other at a fixed interval (the centers of the rod-shaped bodies are 10 mm apart from each other). First, the toothbrush 1 is set on the testing machine 200. At this time, the tip of the toothbrush bristles implanted in the head 2 of the toothbrush 1 is brought into contact with the reference surface 202 of the testing machine 200. Then, the maximum resistance value when the head 2 is horizontally slid with respect to the reference surface 202 is obtained, and this is used as the tip strength of the toothbrush bristles. The sliding direction of the head 2 is a direction in which the longitudinal direction of the toothbrush 1 and the longitudinal direction of the rod-shaped body become perpendicular to each other. Set the sliding speed of the head 2 to 10 mm/min.

牙刷毛的毛尖強度較佳為1.7 N～3.0 N，更佳為1.9 N～2.8 N。若牙刷毛的毛尖強度為所述較佳的範圍，則可進一步提高齒斑的去除力，且牙刷毛對於牙齦的接觸感變得更良好，可進一步提高使用性。The tip strength of the toothbrush bristles is preferably 1.7 N to 3.0 N, more preferably 1.9 N to 2.8 N. If the tip strength of the toothbrush bristles is in the above-mentioned preferred range, the removal power of dental plaque can be further improved, and the contact feeling of the toothbrush bristles with the gums becomes better, and the usability can be further improved.

本實施形態的牙刷1是依據先前公知的牙刷的製造方法來製造。例如，將硬質樹脂射出至模具中，而使柄體10成形。繼而，於所獲得的柄體10的植毛面20上植設毛束，藉此可獲得牙刷1。作為植設毛束的方法，例如可列舉：將毛束對折並將夾在中間的平線打入植毛孔22中，藉此植設毛束的平線式植毛；朝成為植毛部的熔融樹脂中壓入毛束的下端並加以固定的熱熔接法；對毛束的下端進行加熱而形成熔融塊後，將熔融樹脂注入至模具中來使植毛部成形的模內（in-mold）法等。 第1發明的牙刷於設為藉由平線式植毛來對毛束進行植毛的牙刷時特別有效果。當採用平線式植毛時，由平線打入所產生的負荷施加至頭部。因此，頭部變得越薄，對於施加力時的變形的強度變得越低。於本實施形態的牙刷1中，藉由使頸部具有適度的彎曲性，於刷牙時等可將施加至頭部的力自頭部分散至整個頸部。因此，於平線式植毛的情況下，可特別顯著地獲得本發明的效果。 尤其於利用將強度低的聚丙烯樹脂用作柄體的材質的平線式植毛的牙刷的情況下，當將相對於頭部的長度（L2）的頭部的彎曲量（A/L2）的值X設為0.015～0.045時，較佳為將相對於頭部與頸部的長度的和（L2＋L3）的頸部的彎曲量（B/（L2＋L3））的值Y與所述X的比，即Y/X設為0.8～2.0。所述X較佳為設為0.018～0.45，更佳為設為0.018～0.040，此時，較佳為將Y/X設為0.9～2.0，更佳為設為0.9～1.9。 另外，於利用將強度高的聚縮醛樹脂用作柄體材質的平線式植毛的牙刷的情況下，當將所述X設為0.027～0.035，較佳為設為0.029～0.032時，較佳為將所述Y/X設為1.0～1.4，更佳為設為1.0～1.3。The toothbrush 1 of this embodiment is manufactured according to the manufacturing method of a conventionally well-known toothbrush. For example, a hard resin is injected into a mold to shape the handle body 10. Then, tufts of hair are planted on the flocking surface 20 of the obtained handle body 10, whereby the toothbrush 1 can be obtained. As a method of planting hair bundles, for example, it is possible to cite: folding the hair bundles in half and punching the flat threads sandwiched between them into the pores 22, thereby planting the hair bundles in the flat line type hair transplantation; in the molten resin that becomes the hair transplantation part The thermal welding method that presses the lower end of the tuft into and fixes it; the in-mold method that heats the lower end of the tuft to form a molten mass, and then injects the molten resin into the mold to shape the tuft part. The toothbrush of the first invention is particularly effective when it is used as a toothbrush in which tufts of hair are transplanted by flat-line-type hair transplantation. When the flat thread is used for flocking, the load generated by the flat thread is applied to the head. Therefore, the thinner the head becomes, the lower the strength against deformation when a force is applied becomes. In the toothbrush 1 of this embodiment, the force applied to the head can be distributed from the head to the entire neck when brushing teeth, etc., by providing the neck with moderate flexibility. Therefore, in the case of flat-line hair transplantation, the effect of the present invention can be obtained particularly remarkably. Especially in the case of a toothbrush using a flat-line type hair transplantation using a low-strength polypropylene resin as the material of the handle body, the value of the bending amount (A/L2) of the head relative to the length (L2) of the head When X is set to 0.015 to 0.045, it is preferable to use the ratio of the value Y of the bending amount (B/(L2+L3)) of the neck relative to the sum (L2+L3) of the length of the head and the neck to the above X, that is Y/X is set to 0.8 to 2.0. The X is preferably 0.018 to 0.45, more preferably 0.018 to 0.040, and in this case, Y/X is preferably 0.9 to 2.0, and more preferably 0.9 to 1.9. In addition, in the case of using a high-strength polyacetal resin as the material of the handle body of the flat-line type hair transplanted toothbrush, when the X is set to 0.027 to 0.035, preferably 0.029 to 0.032, it is preferable In order to set said Y/X to 1.0-1.4, it is more preferable to set it as 1.0-1.3.

對本實施形態的牙刷1的使用方法進行說明。 首先，握持柄部6。握持柄部6的形態並無特別限定，可為掌握（palm grip）式，亦可為筆握（pen grip）式。通常，一面向對象部位施加壓力一面進行清掃，因此於任一種握持形態中，均將拇指等放在頸部後端的邊界P2附近來握持柄部6。 繼而，將頭部2插入口腔內，一面按壓柄部6，一面使植毛部於清掃對象部位上滑動。施加至柄部6上的力經由頸部4而傳遞至頭部2，進而自頭部2傳遞至植毛部，藉此植毛部一面向清掃對象部位施加壓力一面進行清掃。此時，因頭部的彎曲量A與頸部的彎曲量B的積（A×B）為0.8～10，故可獲得頭部與頸部協調的適度的彎曲。其結果，容易使植設於牙刷1的頭部2中的牙刷毛到達臼齒的深處等口腔內的各個角落，可提高口腔內的清掃力。進而，容易使牙刷毛進入至牙周袋中，可提高牙周袋的清掃力。此外，藉由獲得適度的彎曲，植毛部的柔韌性與緩衝性提昇，植毛部對於牙齦的接觸感變得良好，可獲得對於牙齦的良好的按摩效果，並可提高使用感。 另外，若頭部的彎曲量A'與頸部的彎曲量B的積（A'×B）為2.5～12，則更容易獲得頭部與頸部協調的適度的彎曲。藉此，可進一步提高口腔內的臼齒的深處或牙周袋等的清掃力，另外，容易獲得對於牙齦的良好的按摩效果，可進一步提高使用感。The usage method of the toothbrush 1 of this embodiment is demonstrated. First, hold the handle 6. The shape of the grip 6 is not particularly limited, and it may be a palm grip type or a pen grip type. Normally, cleaning is performed while applying pressure to the target part. Therefore, in any gripping mode, the thumb or the like is placed near the boundary P2 of the rear end of the neck to grip the handle 6. Then, the head 2 is inserted into the oral cavity, while pressing the handle 6, while sliding the hair transplantation part on the cleaning target site. The force applied to the handle 6 is transmitted to the head 2 through the neck 4, and then transmitted from the head 2 to the hair transplanting part, whereby the hair transplanting part performs cleaning while applying pressure to the cleaning target part. At this time, since the product (A×B) of the bending amount A of the head and the bending amount B of the neck is 0.8 to 10, a moderate bending of the head and the neck can be obtained. As a result, the toothbrush bristles implanted in the head 2 of the toothbrush 1 can easily reach every corner in the oral cavity such as the depth of the molars, and the cleaning force in the oral cavity can be improved. Furthermore, it is easy for the toothbrush bristles to enter the periodontal pocket, and the cleaning power of the periodontal pocket can be improved. In addition, by obtaining a moderate curvature, the flexibility and cushioning properties of the hair transplantation part are improved, the contact feeling of the hair transplantation part to the gums becomes better, a good massage effect on the gums can be obtained, and the feeling of use can be improved. In addition, if the product (A'×B) of the bending amount A'of the head and the bending amount B of the neck is 2.5 to 12, it is easier to obtain a moderate bending of the head and the neck in harmony. Thereby, the cleaning power of the deep part of the molars in the oral cavity, periodontal pockets, etc. can be further improved, and a good massage effect on the gums can be easily obtained, and the feeling of use can be further improved.

另外，若頭部2的厚度T1為2.0 mm～4.0 mm、且頸部4的最小直徑為3.0 mm～4.5 mm，則更容易使植設於頭部2中的牙刷毛到達臼齒的深處等口腔內的各個角落，可進一步提高口腔內的清掃力。進而，可進一步提高牙刷1的操作性。 進而，若毛尖強度為1.7 N～3.0 N，則更容易使牙刷毛進入至牙周袋中，可進一步提高牙周袋的清掃力。進而，對於牙齦的接觸感變得更良好，可進一步提高使用感。In addition, if the thickness T1 of the head 2 is 2.0 mm to 4.0 mm, and the minimum diameter of the neck 4 is 3.0 mm to 4.5 mm, it is easier for the toothbrush bristles implanted in the head 2 to reach the depths of the molars, etc. Every corner of the oral cavity can further improve the cleaning power in the oral cavity. Furthermore, the operability of the toothbrush 1 can be further improved. Furthermore, if the hair tip strength is 1.7 N to 3.0 N, it is easier for the toothbrush bristles to enter the periodontal pocket, and the cleaning power of the periodontal pocket can be further improved. Furthermore, the feeling of contact with the gums becomes better, and the feeling of use can be further improved.

[第2發明] 第2發明的牙刷的特徵在於：包括植設有毛束的頭部、延伸設置於頭部的頸部、及延伸設置於頸部的柄部，且頭部的彎曲量A'與頸部的彎曲量B的積（A'×B）為2.5～12。第2發明的牙刷除需要頭部的彎曲量A'與頸部的彎曲量B的積（A'×B）為2.5～12以外，可採用與第1發明的牙刷相同的形態，較佳的形態亦相同。 關於A'×B，如第1發明中所說明般。[Second Invention] The toothbrush of the second invention is characterized in that it includes a head implanted with tufts of hair, a neck extending on the head, and a handle extending on the neck, and the amount of curvature A'of the head and the amount of curvature of the neck The product of the bending amount B (A'×B) is 2.5-12. The toothbrush of the second invention can take the same form as the toothbrush of the first invention, except that the product (A'×B) of the amount of curvature A'of the head and the amount of curvature B of the neck is 2.5-12. The shape is also the same. Regarding A'×B, it is as described in the first invention.

於第2發明的牙刷中，因頭部的彎曲量A'與頸部的彎曲量B的積（A'×B）為2.5～12，故可獲得頭部與頸部協調的適度的彎曲。其結果，容易使植設於牙刷的頭部中的牙刷毛到達臼齒的深處等口腔內的各個角落，可提高口腔內的清掃力。進而，容易使牙刷毛進入至牙周袋中，可提高牙周袋的清掃力。此外，藉由獲得適度的彎曲，植毛部的柔韌性與緩衝性提昇，植毛部對於牙齦的接觸感變得良好，可獲得對於牙齦的良好的按摩效果，並可提高使用感。In the toothbrush of the second invention, since the product (A'×B) of the bending amount A'of the head and the bending amount B of the neck is 2.5 to 12, a moderate bending of the head and the neck can be obtained. As a result, the toothbrush bristles implanted in the head of the toothbrush can easily reach every corner in the oral cavity such as the depth of the molars, and the cleaning power in the oral cavity can be improved. Furthermore, it is easy for the toothbrush bristles to enter the periodontal pocket, and the cleaning power of the periodontal pocket can be improved. In addition, by obtaining a moderate curvature, the flexibility and cushioning properties of the hair transplantation part are improved, the contact feeling of the hair transplantation part to the gums becomes better, a good massage effect on the gums can be obtained, and the feeling of use can be improved.

以下利用實施例來更詳細地說明本發明，但本發明並不限定於該些實施例。 本實施例中所使用的材料如下述般。 ＜柄體＞ ・POM-1（彎曲彈性係數：2600 MPa） ・PP-1（彎曲彈性係數：1900 MPa） ・PP-2（彎曲彈性係數：1400 MPa） ＜牙刷毛＞ ・PBTThe following examples illustrate the present invention in more detail, but the present invention is not limited to these examples. The materials used in this example are as follows. ＜Handle body＞ ・POM-1 (flexural coefficient of elasticity: 2600 MPa) ・PP-1 (flexural elastic modulus: 1900 MPa) ・PP-2 (flexural coefficient of elasticity: 1400 MPa) ＜Toothbrush bristles＞ ・PBT

（實施例1～實施例3、比較例1～比較例2） 製作與圖1A及圖1B相同的牙刷。各例的牙刷的柄體的長度L1為180 mm，將頭部的厚度T1、頭部的長度L2、頭部的寬度W1、頸部的最小直徑T2、頸部的長度L3、邊界P2的寬度、邊界P2的厚度設為表1中所示的尺寸。於頭部中，捆紮23根牙刷毛（PBT製）來作為毛束，以圖1A中所示的植毛圖案植設該毛束，而設置植毛部。再者，將各例的牙刷毛的長度及粗度設為表1中所示的尺寸。 各例的牙刷的材質如表1中所示般。 另外，利用所述方法測定各例的牙刷的頭部的彎曲量A與頸部的彎曲量B、毛尖強度（邊界P1的位置：自柄體10的前端9起31.5 mm，邊界P2的位置：自柄體10的前端9起76.0 mm）。 將各例的牙刷的彎曲量A、彎曲量B、A×B及毛尖強度示於表1中。(Example 1 to Example 3, Comparative Example 1 to Comparative Example 2) The same toothbrush as in Fig. 1A and Fig. 1B was produced. The length L1 of the handle body of the toothbrush of each example is 180 mm, and the thickness of the head T1, the length L2 of the head, the width of the head W1, the minimum diameter of the neck T2, the length L3 of the neck, and the width of the boundary P2 , The thickness of the boundary P2 is set to the size shown in Table 1. In the head, 23 toothbrush bristles (manufactured by PBT) were bundled as a tuft, and the tuft was planted in the tufting pattern shown in FIG. 1A to provide a tufting part. In addition, the length and thickness of the toothbrush bristles of each example were made into the size shown in Table 1. The material of the toothbrush of each example is as shown in Table 1. In addition, the amount of curvature A of the head and the amount of curvature B of the neck of the toothbrush of each example were measured by the method described above, and the tip strength (position of the boundary P1: 31.5 mm from the front end 9 of the handle body 10, position of the boundary P2: 76.0 mm from the front end 9 of the handle body 10). Table 1 shows the bending amount A, bending amount B, A×B, and hair tip strength of the toothbrush of each example.

（實施例4～實施例9、比較例3～比較例7） 製作與圖1A及圖1B相同的牙刷。各例的牙刷的柄體的長度L1為180 mm（實施例4～實施例9、比較例3～比較例7），將頭部的厚度T1、頭部的長度L2、頭部的寬度W1、頸部的最小直徑T2、頸部的長度L3、邊界P2的寬度、邊界P2的厚度設為表2及表3中所示的尺寸。於頭部中，捆紮23根牙刷毛（PBT製）來作為毛束，以圖1A中所示的植毛圖案植設該毛束，而設置植毛部。再者，將各例的牙刷毛的長度及粗度設為表2及表3中所示的尺寸。 各例的牙刷的材質如表2及表3中所示般。 另外，利用所述方法測定各例的牙刷的頭部的彎曲量A、頭部的彎曲量A'、頸部的彎曲量B、及毛尖強度。於各例的牙刷中，固定牙刷的邊界P1的位置及邊界P2的位置如所述般決定。 將各例的牙刷的彎曲量A、彎曲量A'、彎曲量B、A×B、A'×B、及毛尖強度示於表2及表3中。(Example 4 to Example 9, Comparative Example 3 to Comparative Example 7) The same toothbrush as in Fig. 1A and Fig. 1B was produced. The length L1 of the handle body of the toothbrush of each example is 180 mm (Example 4 to Example 9, Comparative Example 3 to Comparative Example 7), and the thickness T1 of the head, the length L2, and the width W1 of the head The minimum diameter T2 of the neck portion, the length L3 of the neck portion, the width of the boundary P2, and the thickness of the boundary P2 were set to the dimensions shown in Table 2 and Table 3. In the head, 23 toothbrush bristles (manufactured by PBT) were bundled as a tuft, and the tuft was planted in the tufting pattern shown in FIG. 1A to provide a tufting part. In addition, the length and thickness of the toothbrush bristles of each example were made into the size shown in Table 2 and Table 3. The material of the toothbrush of each example is as shown in Table 2 and Table 3. In addition, the amount of curvature A of the head of the toothbrush of each example, the amount of curvature A'of the head, the amount of curvature B of the neck, and the tip strength were measured by the method described above. In the toothbrush of each example, the position of the boundary P1 of the fixed toothbrush and the position of the boundary P2 are determined as described above. Table 2 and Table 3 show the bending amount A, bending amount A', bending amount B, A×B, A'×B, and the tip strength of the toothbrush of each example.

另外，關於各例的牙刷，如下述般評價清掃力、使用感、操作性。 將各自的評價結果示於表1～表3中。In addition, regarding the toothbrush of each example, the cleaning power, the feeling of use, and the operability were evaluated as follows. The respective evaluation results are shown in Tables 1 to 3.

[臼齒的深處（臼齒的咽喉側）的清掃力] 10名監控人員利用各例的牙刷對口腔內進行清掃，並以下述的評價基準評價此時的臼齒的深處的清掃效果。將10名監控人員的平均分為4分以上設為「○」，將平均分為2分以上、未滿4分設為「△」，將平均分未滿2分設為「×」。 ＜評價基準＞ 5分：非常感覺到臼齒的深處的污垢掉落的觸感。 4分：強烈感覺到臼齒的深處的污垢掉落的觸感。 3分：感覺到臼齒的深處的污垢掉落的觸感。 2分：不怎麼感覺到臼齒的深處的污垢掉落的觸感。 1分：感覺不到臼齒的深處的污垢掉落的觸感。[Cleaning power in the depths of the molars (the throat side of the molars)] Ten monitoring personnel cleaned the oral cavity with the toothbrush of each example, and evaluated the cleaning effect of the deep part of the molar tooth at this time based on the following evaluation criteria. The average score of 10 monitoring personnel is 4 or more as "○", the average score is 2 or more, and less than 4 points as "△", and the average score is less than 2 points as "×". <Evaluation criteria> 5 points: The tactile sensation of the dirt falling from the depths of the molars is very felt. 4 points: The tactile sensation of the dirt falling from the depths of the molar teeth is strongly felt. 3 points: Feel the tactile sensation of dirt falling from the depths of the molars. 2 points: The tactile sensation of the dirt falling from the depths of the molar teeth is not much felt. 1 point: The tactile sensation of dirt falling from the depths of the molar teeth is not felt.

[使用感的評價] 10名監控人員利用各例的牙刷對口腔內進行清掃，以下述的評價基準評價此時的對於牙齦的接觸感，並評價牙刷的使用感。將10名監控人員的平均分為4分以上設為「○」，將平均分為2分以上、未滿4分設為「△」，將平均分未滿2分設為「×」。 ＜評價基準＞ 5分：無牙齦的疼痛，接觸感非常優異。 4分：無牙齦的疼痛，接觸感很優異。 3分：無牙齦的疼痛，接觸感優異。 2分：牙齦感覺到輕微的疼痛。 1分：牙齦感覺到強烈的疼痛。[Evaluation of usability] Ten monitoring personnel cleaned the oral cavity using the toothbrush of each example, evaluated the contact sensation to the gums at this time based on the following evaluation criteria, and evaluated the use sensation of the toothbrush. The average score of 10 monitoring personnel is 4 or more as "○", the average score is 2 or more, and less than 4 points as "△", and the average score is less than 2 points as "×". <Evaluation criteria> 5 points: There is no gum pain, and the touch feeling is very excellent. 4 points: There is no gum pain, and the touch feeling is excellent. 3 points: There is no gum pain, and the touch feeling is excellent. 2 points: A slight pain is felt in the gums. 1 point: A strong pain is felt in the gums.

[於口腔內的操作性] 10名監控人員對口腔內進行清掃，並對各例的牙刷的操作性進行評價。操作性的評價設為1分～7分的7個階段，越感覺到操作性良好者，分數變得越高。將10名監控人員的平均分分類成下述判定基準，而判定於口腔內的操作性。 ＜判定基準＞ ○：平均分為5分以上。 △：平均分為3分以上、未滿5分。 ×：平均分未滿3分。[Operability in the oral cavity] Ten monitoring personnel cleaned the oral cavity and evaluated the operability of the toothbrush in each case. The evaluation of operability was set to 7 levels from 1 to 7 points, and the more the operability was felt, the higher the score became. The average scores of 10 monitoring personnel were classified into the following judgment criteria, and the operability in the oral cavity was judged. <Judgment Criteria> ○: The average score is 5 points or more. △: The average score is 3 or more and less than 5 points. ×: The average score is less than 3 points.

[表1]   實施例1 實施例2 實施例3 比較例1 比較例2 頭部的彎曲量A 0.87 0.89 1.77 0.18 3.11 頸部的彎曲量B 2.90 2.60 3.90 2.00 6.30 A×B 2.50 2.30 6.90 0.40 19.6 頭部的厚度T1（mm） 2.6 3.0 2.6 4.5 2.6 頭部的長度L2（mm） 31.5 31.5 31.5 31.5 31.5 頭部的寬度W1（mm） 10.5 10.5 10.5 10.5 10.5 頸部的最小直徑T2（mm） 3.5 4.0 3.5 5.0 3.5 頸部的長度L3（mm） 44.5 44.5 44.5 44.5 44.5 P2的寬度（mm） 7.5 7.5 7.5 7.5 7.5 P2的厚度（mm） 9.2 9.2 9.2 9.2 9.2 毛尖強度（N） 2.5 2.15 2.57 2.51 2.1 柄體的材質 POM-1 PP-1 PP-1 PP-2 PP-2 牙刷毛的材質 PBT PBT PBT PBT PBT 牙刷毛的長度（mm） 29 29 29 31 29 牙刷毛的粗度（mil） 7.5 7.5 7.5 7.5 7.5 植毛深度（mm） 2.2 2.5 2.2 3.8 2.2 臼齒的深處的清掃力 平均分 4.8 4.4 4.6 1.2 1.9 評價 ○ ○ ○ × × 使用感 平均分 4.2 4.3 4.2 3.2 4.2 評價 ○ ○ ○ △ ○ 口腔內操作性 平均分 6.6 6.2 4.9 2.7 2.1 評價 ○ ○ △ × × [Table 1] Example 1 Example 2 Example 3 Comparative example 1 Comparative example 2 The bending amount of the head A 0.87 0.89 1.77 0.18 3.11 Bending amount of neck 2.90 2.60 3.90 2.00 6.30 A×B 2.50 2.30 6.90 0.40 19.6 The thickness of the head T1 (mm) 2.6 3.0 2.6 4.5 2.6 The length of the head L2 (mm) 31.5 31.5 31.5 31.5 31.5 The width of the head W1 (mm) 10.5 10.5 10.5 10.5 10.5 The minimum diameter of the neck T2 (mm) 3.5 4.0 3.5 5.0 3.5 The length of the neck L3 (mm) 44.5 44.5 44.5 44.5 44.5 Width of P2 (mm) 7.5 7.5 7.5 7.5 7.5 Thickness of P2 (mm) 9.2 9.2 9.2 9.2 9.2 Hair tip strength (N) 2.5 2.15 2.57 2.51 2.1 Handle body material POM-1 PP-1 PP-1 PP-2 PP-2 The material of the toothbrush bristles PBT PBT PBT PBT PBT Length of toothbrush bristles (mm) 29 29 29 31 29 Thickness of toothbrush bristles (mil) 7.5 7.5 7.5 7.5 7.5 Planting depth (mm) 2.2 2.5 2.2 3.8 2.2 Deep cleaning power of molars The average score 4.8 4.4 4.6 1.2 1.9 Evaluation ○ ○ ○ X X Sense of use The average score 4.2 4.3 4.2 3.2 4.2 Evaluation ○ ○ ○ △ ○ Intraoral operability The average score 6.6 6.2 4.9 2.7 2.1 Evaluation ○ ○ △ X X

[表2]   實施例4 實施例5 實施例6 實施例7 實施例8 實施例9 頭部的彎曲量A 0.72 0.51 1.26 0.70 0.78 0.93 頸部的彎曲量B 2.58 2.43 2.45 2.44 2.33 2.52 頭部的彎曲量A' 1.68 1.22 2.70 1.73 1.86 2.12 A×B 1.86 1.24 3.09 1.71 1.82 2.34 A'×B 4.33 2.96 6.62 4.22 4.33 5.34 頭部的厚度T1（mm） 3.0 3.0 3.0 3.0 3.0 2.6 頭部的長度L2（mm） 28.9 25.3 33.7 28.7 30.0 28.7 頭部的寬度W1（mm） 9.1 10.6 10.3 10.3 10.5 10.3 頸部的最小直徑T2（mm） 4.0 4.0 4.0 4.0 4.0 3.0 頸部的長度L3（mm） 42.0 45.4 37.3 42.2 40.3 42.2 P2的寬度（mm） 7.8 7.8 7.8 7.8 7.8 7.8 P2的厚度（mm） 9.4 9.4 9.4 9.4 9.4 9.4 毛尖強度（N） 1.41 1.87 2.37 1.89 3.58 1.89 柄體的材質 PP-1 PP-1 PP-1 PP-1 PP-1 POM-1 牙刷毛的材質 PBT PBT PBT PBT PBT PBT 牙刷毛的長度（mm） 29 27 29 29 25 29 牙刷毛的粗度（mil） 5.5 7.0 7.5 7.5 9 7.5 植毛深度（mm） 2.5 2.5 2.5 2.5 2.5 2.5 臼齒的深處的清掃力 平均分 4.5 4.8 4.2 4.4 4.4 4.9 評價 ○ ○ ○ ○ ○ ○ 使用感 平均分 4.8 4.6 4.4 4.5 4.1 4.5 評價 ○ ○ ○ ○ ○ ○ 口腔內操作性 平均分 5.7 6.6 5.9 6.2 6.2 6.7 評價 ○ ○ ○ ○ ○ ○ [Table 2] Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 The bending amount of the head A 0.72 0.51 1.26 0.70 0.78 0.93 Bending amount of neck 2.58 2.43 2.45 2.44 2.33 2.52 The bending amount of the head A' 1.68 1.22 2.70 1.73 1.86 2.12 A×B 1.86 1.24 3.09 1.71 1.82 2.34 A'×B 4.33 2.96 6.62 4.22 4.33 5.34 The thickness of the head T1 (mm) 3.0 3.0 3.0 3.0 3.0 2.6 The length of the head L2 (mm) 28.9 25.3 33.7 28.7 30.0 28.7 The width of the head W1 (mm) 9.1 10.6 10.3 10.3 10.5 10.3 The minimum diameter of the neck T2 (mm) 4.0 4.0 4.0 4.0 4.0 3.0 The length of the neck L3 (mm) 42.0 45.4 37.3 42.2 40.3 42.2 Width of P2 (mm) 7.8 7.8 7.8 7.8 7.8 7.8 Thickness of P2 (mm) 9.4 9.4 9.4 9.4 9.4 9.4 Hair tip strength (N) 1.41 1.87 2.37 1.89 3.58 1.89 Handle body material PP-1 PP-1 PP-1 PP-1 PP-1 POM-1 The material of the toothbrush bristles PBT PBT PBT PBT PBT PBT Length of toothbrush bristles (mm) 29 27 29 29 25 29 Thickness of toothbrush bristles (mil) 5.5 7.0 7.5 7.5 9 7.5 Planting depth (mm) 2.5 2.5 2.5 2.5 2.5 2.5 Deep cleaning power of molars The average score 4.5 4.8 4.2 4.4 4.4 4.9 Evaluation ○ ○ ○ ○ ○ ○ Sense of use The average score 4.8 4.6 4.4 4.5 4.1 4.5 Evaluation ○ ○ ○ ○ ○ ○ Intraoral operability The average score 5.7 6.6 5.9 6.2 6.2 6.7 Evaluation ○ ○ ○ ○ ○ ○

[表3]   比較例3 比較例4 比較例5 比較例6 比較例7 頭部的彎曲量A 0.29 0.38 0.19 0.33 0.35 頸部的彎曲量B 1.70 1.79 2.20 1.97 1.79 頭部的彎曲量A' 0.77 1.17 0.52 0.76 0.61 A×B 0.49 0.68 0.42 0.65 0.63 A'×B 1.31 2.09 1.14 1.50 1.09 頭部的厚度T1（mm） 4.5 4.5 4.5 4.5 4.5 頭部的長度L2（mm） 28.0 34.0 24.8 28.0 32.2 頭部的寬度W1（mm） 8.8 10.3 10.6 10.3 10.5 頸部的最小直徑T2（mm） 5.0 5.0 5.0 5.0 5.0 頸部的長度L3（mm） 42.7 37.0 45.9 42.7 39.8 P2的寬度（mm） 7.8 7.8 7.8 7.8 7.5 P2的厚度（mm） 9.4 9.4 9.4 9.4 9.0 柄體的材質 PP-2 PP-2 PP-2 PP-2 PP-1 牙刷毛的材質 PBT PBT PBT PBT PBT 牙刷毛的長度（mm） 31 31 31 31 27 牙刷毛的粗度（mil） 7.5 7.5 7.5 7.5 7.5 植毛深度（mm） 3.8 3.8 3.8 3.8 3.8 臼齒的深處的清掃力 平均分 1.6 1.0 1.9 1.2 1.2 評價 × × × × × 使用感 平均分 3.8 3.5 3.1 3.2 2.9 評價 △ △ △ △ △ 口腔內操作性 平均分 2.9 2.1 3.5 2.7 2.7 評價 × × △ × × [table 3] Comparative example 3 Comparative example 4 Comparative example 5 Comparative example 6 Comparative example 7 The bending amount of the head A 0.29 0.38 0.19 0.33 0.35 Bending amount of neck 1.70 1.79 2.20 1.97 1.79 The bending amount of the head A' 0.77 1.17 0.52 0.76 0.61 A×B 0.49 0.68 0.42 0.65 0.63 A'×B 1.31 2.09 1.14 1.50 1.09 The thickness of the head T1 (mm) 4.5 4.5 4.5 4.5 4.5 The length of the head L2 (mm) 28.0 34.0 24.8 28.0 32.2 The width of the head W1 (mm) 8.8 10.3 10.6 10.3 10.5 The minimum diameter of the neck T2 (mm) 5.0 5.0 5.0 5.0 5.0 The length of the neck L3 (mm) 42.7 37.0 45.9 42.7 39.8 Width of P2 (mm) 7.8 7.8 7.8 7.8 7.5 Thickness of P2 (mm) 9.4 9.4 9.4 9.4 9.0 Handle body material PP-2 PP-2 PP-2 PP-2 PP-1 The material of the toothbrush bristles PBT PBT PBT PBT PBT Length of toothbrush bristles (mm) 31 31 31 31 27 Thickness of toothbrush bristles (mil) 7.5 7.5 7.5 7.5 7.5 Planting depth (mm) 3.8 3.8 3.8 3.8 3.8 Deep cleaning power of molars The average score 1.6 1.0 1.9 1.2 1.2 Evaluation X X X X X Sense of use The average score 3.8 3.5 3.1 3.2 2.9 Evaluation △ △ △ △ △ Intraoral operability The average score 2.9 2.1 3.5 2.7 2.7 Evaluation X X △ X X

如表1所示，應用本發明的實施例1、實施例2、實施例3的牙刷的口腔內的清掃力優異、且使用感良好。進而，於口腔內的操作性優異。 相對於此，A×B未滿0.8的牙刷（比較例1）、A×B超過10的牙刷（比較例2）的對於臼齒的深處的清掃力並不充分，亦無法獲得於口腔內的良好的操作性。As shown in Table 1, the toothbrushes to which Example 1, Example 2, and Example 3 of the present invention are applied have excellent cleaning power in the oral cavity and a good feeling of use. Furthermore, the operability in the oral cavity is excellent. In contrast, toothbrushes with A×B less than 0.8 (Comparative Example 1) and toothbrushes with A×B greater than 10 (Comparative Example 2) have insufficient cleaning power against the depths of the molars, and cannot be obtained in the oral cavity. Good operability.

另外，如表2所示，應用本發明的牙刷（實施例4～實施例9）的口腔內的清掃力優異、且使用感良好。進而，於口腔內的操作性優異。 相對於此，如表3所示，A×B未滿0.8、且A'×B未滿3的牙刷（比較例3～比較例7）的對於臼齒的深處的清掃力、對於牙周袋的清掃力、使用感、及於口腔內的操作性的至少一者並不充分。 根據以上的結果，可確認應用本發明的牙刷的口腔內的清掃力更優異、且使用感更優異。In addition, as shown in Table 2, the toothbrush of the present invention (Example 4 to Example 9) has excellent cleaning power in the oral cavity and has a good feeling of use. Furthermore, the operability in the oral cavity is excellent. On the other hand, as shown in Table 3, toothbrushes with A×B less than 0.8 and A'×B less than 3 (Comparative Examples 3 to 7) have a cleaning force against the depth of the molar tooth and the periodontal pocket At least one of the cleaning power, the feeling of use, and the operability in the oral cavity is not sufficient. From the above results, it can be confirmed that the toothbrush of the present invention has more excellent cleaning power in the oral cavity and more excellent usability.

1:牙刷 2:頭部 4:頸部 6:柄部 9:柄體的前端 10:柄體 20:植毛面 22:植毛孔 100:夾具 102:秤錘 200:ISO毛硬強度試驗機 202:基準面 204:梯狀物 a:H1 與H0 的差的絕對值 H0 :基準高度 H1 :高度 L1、L2、L3、L4:長度 P1、P2:邊界 R1、R2:曲線或直線 S:相對於植毛部長軸方向，自植毛部前端起10±3%的位置 T2:頸部的厚度（頸部的最小直徑） W1:頭部的寬度 W2:頸部的寬度1: Toothbrush 2: Head 4: Neck 6: Handle 9: The front end of the handle body 10: Handle body 20: The tufting surface 22: The tufting hole 100: Fixture 102: Weight 200: ISO bristles strength testing machine 202: Reference surface 204: ladder a: absolute value of the difference between H 1 and H 0 H 0 : reference height H 1 : height L1, L2, L3, L4: length P1, P2: boundary R1, R2: curve or straight line S : The position 10±3% from the tip of the transplanted hair relative to the long axis of the transplanted hair. T2: The thickness of the neck (the smallest diameter of the neck) W1: The width of the head W2: The width of the neck

圖1A是本發明的一實施形態的牙刷的平面圖。 圖1B是本發明的一實施形態的牙刷的側面圖。 圖2A是說明頭部的彎曲量的測定方法的圖。 圖2B是說明頭部的彎曲量的測定方法的圖。 圖3是說明毛尖強度的測定方法的圖。Fig. 1A is a plan view of a toothbrush according to an embodiment of the present invention. Fig. 1B is a side view of the toothbrush according to the embodiment of the present invention. Fig. 2A is a diagram illustrating a method of measuring the bending amount of the head. Fig. 2B is a diagram illustrating a method of measuring the bending amount of the head. Fig. 3 is a diagram illustrating a method of measuring the strength of the hair tip.

1:牙刷 1: Toothbrush

2:頭部 2: head

4:頸部 4: neck

6:柄部 6: handle

9:柄體的前端 9: The front end of the handle body

10:柄體 10: Handle body

20:植毛面 20: Tufted surface

22:植毛孔 22: Planting pores

L1、L2、L3、L4:長度 L1, L2, L3, L4: length

P1、P2:邊界 P1, P2: boundary

R1、R2:曲線或直線 R1, R2: curve or straight line

W1:頭部的寬度 W1: the width of the head

W2:頸部的寬度 W2: the width of the neck

Claims (29)

一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上植設有毛束，並且 藉由下述的方法（α）所測定的所述頭部的彎曲量A與藉由下述的方法（β）所測定的所述頸部的彎曲量B的積為0.8～10， 所述彎曲量A為0.5～3.0，所述彎曲量B為2.1～5.0， 所述頭部的厚度為2.0 mm～4.0 mm、且所述頸部的最小的寬度與最小的厚度中的小的一方為3.0 mm～4.5 mm， 所述柄體的材質為聚丙烯樹脂， 方法（α）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頭部與所述頸部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A； 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。A toothbrush, characterized in that it comprises a handle body with a head, a neck extending on the head, and a handle extending on the neck, and is planted on the tufted surface of the head Has hair bundles, and The product of the amount of curvature A of the head measured by the following method (α) and the amount of curvature B of the neck measured by the following method (β) is 0.8-10, The bending amount A is 0.5 to 3.0, and the bending amount B is 2.1 to 5.0, The thickness of the head is 2.0 mm to 4.0 mm, and the smaller of the smallest width and the smallest thickness of the neck is 3.0 mm to 4.5 mm, The material of the handle body is polypropylene resin, Method (α): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the head and the neck is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a 200 g weight is hung from the front end of the hair transplanting part at a position of 10±3%, And the amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount A of the head; Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. 如請求項1所述的牙刷，其中所述頭部的彎曲量A與所述頸部的彎曲量B的積為2～10。The toothbrush according to claim 1, wherein the product of the bending amount A of the head and the bending amount B of the neck is 2-10. 如請求項1或2所述的牙刷，其中藉由下述的方法（α'）所測定的所述頭部的彎曲量A'與所述頸部的彎曲量B的積為2.5～12， 方法（α'）：使所述頭部的植毛面朝向鉛垂方向的上方，以將自所述頭部與所述頸部的邊界的位置朝所述柄部側移動10 mm的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A'。The toothbrush according to claim 1 or 2, wherein the product of the bending amount A'of the head and the bending amount B of the neck measured by the following method (α') is 2.5-12, Method (α'): Make the tufted surface of the head face upward in the vertical direction, and fix the position by moving 10 mm from the position of the border between the head and the neck toward the shank side The height of the front end of the handle body in the state is the reference height, and in the fixed state, the length relative to the long axis direction of the hair transplantation part in the head is 10 from the front end of the hair transplantation part. Hang a weight of 200 g at the position of ±3%, and set the height displacement (in mm) of the front end of the handle body after 10 seconds from the reference height as the bending of the head量A'. 一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上植設有毛束，並且 藉由下述的方法（α'）所測定的所述頭部的彎曲量A'與藉由下述的方法（β）所測定的所述頸部的彎曲量B的積為2.5～12， 所述彎曲量A'為1～5，所述彎曲量B為2.1～5.0， 所述頭部的厚度為2.0 mm～4.0 mm、且所述頸部的最小的寬度與最小的厚度中的小的一方為3.0 mm～4.5 mm， 所述柄體的材質為聚丙烯樹脂， 方法（α'）：使所述頭部的植毛面朝向鉛垂方向的上方，以將自所述頭部與所述頸部的邊界的位置朝所述柄部側移動10 mm的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A'； 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。A toothbrush, characterized in that it comprises a handle body with a head, a neck extending on the head, and a handle extending on the neck, and is planted on the tufted surface of the head Has hair bundles, and The product of the bending amount A'of the head measured by the following method (α') and the bending amount B of the neck measured by the following method (β) is 2.5-12, The bending amount A'is 1 to 5, and the bending amount B is 2.1 to 5.0, The thickness of the head is 2.0 mm to 4.0 mm, and the smaller of the smallest width and the smallest thickness of the neck is 3.0 mm to 4.5 mm, The material of the handle body is polypropylene resin, Method (α'): Make the tufted surface of the head face upward in the vertical direction, and fix the position by moving 10 mm from the position of the border between the head and the neck toward the shank side The height of the front end of the handle body in the state is the reference height, and in the fixed state, the length relative to the long axis direction of the hair transplantation part in the head is 10 from the front end of the hair transplantation part. Hang a weight of 200 g at the position of ±3%, and set the height displacement (in mm) of the front end of the handle body after 10 seconds from the reference height as the bending of the head Quantity A'; Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. 2或4所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.5 mm。The toothbrush according to 2 or 4, wherein the smallest width of the neck is 3.0 mm to 4.5 mm. 2或4所述的牙刷，其中構成所述毛束的牙刷毛的毛尖強度為1.7 N～3.0 N。The toothbrush according to 2 or 4, wherein the tip strength of the toothbrush bristles constituting the bristle bundle is 1.7 N to 3.0 N. 如請求項3所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.5 mm。The toothbrush according to claim 3, wherein the smallest width of the neck is 3.0 mm to 4.5 mm. 一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上植設有毛束，並且 於所述頭部的所述植毛面上植設有所述毛束的形態為平線式植毛， 所述頭部的厚度為2.0 mm～4.0 mm， 所述頸部的最小的寬度為3.0 mm～4.5 mm，最小的厚度為3.0 mm～4.5 mm， 藉由下述的方法（α'）所測定的所述頭部的彎曲量A'與藉由下述的方法（β）所測定的所述頸部的彎曲量B的積為2.5～12， 所述彎曲量A'為1～5 mm， 所述彎曲量B與所述彎曲量A'的比（B/A'）為0.8～2.5， 方法（α'）：使所述頭部的植毛面朝向鉛垂方向的上方，以將自所述頭部與所述頸部的邊界的位置朝所述柄部側移動10 mm的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A'； 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。A toothbrush, characterized in that it comprises a handle body with a head, a neck extending on the head, and a handle extending on the neck, and is planted on the tufted surface of the head Has hair bundles, and The hair tufts are planted on the tufted surface of the head in a form of flat-line tufts, The thickness of the head is 2.0 mm～4.0 mm, The minimum width of the neck is 3.0 mm～4.5 mm, the minimum thickness is 3.0 mm～4.5 mm, The product of the bending amount A'of the head measured by the following method (α') and the bending amount B of the neck measured by the following method (β) is 2.5-12, The bending amount A'is 1～5 mm, The ratio of the bending amount B to the bending amount A'(B/A') is 0.8 to 2.5, Method (α'): Make the tufted surface of the head face upward in the vertical direction, and fix the position by moving 10 mm from the position of the border between the head and the neck toward the shank side The height of the front end of the handle body in the state is the reference height, and in the fixed state, the length relative to the long axis direction of the hair transplantation part in the head is 10 from the front end of the hair transplantation part. Hang a weight of 200 g at the position of ±3%, and set the height displacement (in mm) of the front end of the handle body after 10 seconds from the reference height as the bending of the head Quantity A'; Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. 如請求項8所述的牙刷，其中所述頭部的彎曲量A'與所述頸部的彎曲量B的積為2.5～10。The toothbrush according to claim 8, wherein the product of the bending amount A'of the head and the bending amount B of the neck is 2.5-10. 如請求項8或9所述的牙刷，其中所述彎曲量B與所述彎曲量A'的比（B/A'）為0.8～2.0。The toothbrush according to claim 8 or 9, wherein the ratio (B/A') of the bending amount B to the bending amount A'is 0.8 to 2.0. 如請求項8或9所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.2 mm。The toothbrush according to claim 8 or 9, wherein the smallest width of the neck is 3.0 mm to 4.2 mm. 如請求項8或9所述的牙刷，其中所述彎曲量B為2.1～5.0 mm。The toothbrush according to claim 8 or 9, wherein the bending amount B is 2.1 to 5.0 mm. 如請求項8或9所述的牙刷，其中藉由下述的方法（α）所測定的所述頭部的彎曲量A與所述頸部的彎曲量B的積為2～10， 方法（α）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頭部與所述頸部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A。The toothbrush according to claim 8 or 9, wherein the product of the amount of curvature A of the head and the amount of curvature B of the neck measured by the following method (α) is 2-10, Method (α): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the head and the neck is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a 200 g weight is hung from the front end of the hair transplanting part at a position of 10±3%, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount A of the head. 如請求項13所述的牙刷，其中所述彎曲量B與所述彎曲量A的比（B/A）為1.5～5.0。The toothbrush according to claim 13, wherein the ratio (B/A) of the bending amount B to the bending amount A is 1.5 to 5.0. 如請求項13所述的牙刷，其中所述彎曲量A為0.4～3.0 mm。The toothbrush according to claim 13, wherein the bending amount A is 0.4 to 3.0 mm. 如請求項8或9所述的牙刷，其中構成所述毛束的牙刷毛的毛尖強度為1.7 N～3.0 N。The toothbrush according to claim 8 or 9, wherein the tip strength of the toothbrush bristles constituting the tuft is 1.7 N to 3.0 N. 一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上植設有毛束，並且 於所述頭部的所述植毛面上植設有所述毛束的形態為平線式植毛， 所述頭部的厚度為2.0 mm～4.0 mm，所述頸部的最小的寬度為3.0 mm～4.5 mm， 所述柄體的材質為聚丙烯樹脂， 當將藉由下述的方法（α）所測定的所述頭部的彎曲量設為A，並將藉由下述的方法（β）所測定的所述頸部的彎曲量設為B時，相對於頭部的長度（L2）的頭部的彎曲量（A/L2）的值X為0.015～0.045， 相對於所述頭部的長度（L2）與頸部的長度（L3）的和（L2＋L3）的所述頸部的彎曲量（B/（L2＋L3））的值Y與所述X的比，即Y/X為0.8～2.0， 方法（α）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頭部與所述頸部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A； 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。A toothbrush, characterized in that it comprises a handle body with a head, a neck extending on the head, and a handle extending on the neck, and is planted on the tufted surface of the head Has hair bundles, and The hair tufts are planted on the tufted surface of the head in a form of flat-line tufts, The thickness of the head is 2.0 mm～4.0 mm, the minimum width of the neck is 3.0 mm～4.5 mm, The material of the handle body is polypropylene resin, When the amount of curvature of the head measured by the following method (α) is set to A, and the amount of curvature of the neck measured by the following method (β) is set to B , The value X of the bending amount (A/L2) of the head relative to the length (L2) of the head is 0.015～0.045, The ratio of the value Y of the neck bending amount (B/(L2+L3)) to the X relative to the sum (L2+L3) of the length of the head (L2) and the length of the neck (L3), namely Y/X is 0.8～2.0, Method (α): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the head and the neck is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a 200 g weight is hung from the front end of the hair transplanting part at a position of 10±3%, And the amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount A of the head; Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. 一種牙刷，其特徵在於：包括具備頭部、延伸設置於所述頭部的頸部、及延伸設置於所述頸部的柄部的柄體，並於所述頭部的植毛面上植設有毛束，並且 於所述頭部的所述植毛面上植設有所述毛束的形態為平線式植毛， 所述頭部的厚度為2.0 mm～4.0 mm，所述頸部的最小的寬度為3.0 mm～4.5 mm， 所述柄體的材質為聚縮醛樹脂， 當將藉由下述的方法（α）所測定的所述頭部的彎曲量設為A，並將藉由下述的方法（β）所測定的所述頸部的彎曲量設為B時，相對於頭部的長度（L2）的頭部的彎曲量（A/L2）的值X為0.027～0.035， 相對於所述頭部的長度（L2）與頸部的長度（L3）的和（L2＋L3）的所述頸部的彎曲量（B/（L2＋L3））的值Y與所述X的比，即Y/X為1.0～1.4， 方法（α）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頭部與所述頸部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A； 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。A toothbrush, characterized in that it comprises a handle body with a head, a neck extending on the head, and a handle extending on the neck, and is planted on the tufted surface of the head Has hair bundles, and The hair tufts are planted on the tufted surface of the head in a form of flat-line tufts, The thickness of the head is 2.0 mm～4.0 mm, the minimum width of the neck is 3.0 mm～4.5 mm, The material of the handle body is polyacetal resin, When the amount of curvature of the head measured by the following method (α) is set to A, and the amount of curvature of the neck measured by the following method (β) is set to B , The value X of the bending amount (A/L2) of the head relative to the length (L2) of the head is 0.027～0.035, The ratio of the value Y of the neck bending amount (B/(L2+L3)) to the X relative to the sum (L2+L3) of the length of the head (L2) and the length of the neck (L3), namely Y/X is 1.0～1.4, Method (α): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the head and the neck is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a 200 g weight is hung from the front end of the hair transplanting part at a position of 10±3%, And the amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount A of the head; Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. 如請求項17或18所述的牙刷，其中所述彎曲量A為0.4～3.0 mm，所述彎曲量B為2.1～5.0 mm。The toothbrush according to claim 17 or 18, wherein the bending amount A is 0.4 to 3.0 mm, and the bending amount B is 2.1 to 5.0 mm. 如請求項17或18所述的牙刷，其中所述頸部的最小的厚度為3.0 mm～4.5 mm。The toothbrush according to claim 17 or 18, wherein the minimum thickness of the neck is 3.0 mm to 4.5 mm. 如請求項17或18所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.2 mm。The toothbrush according to claim 17 or 18, wherein the smallest width of the neck is 3.0 mm to 4.2 mm. 如請求項20所述的牙刷，其中所述頸部的最小的厚度為3.0 mm～4.2 mm。The toothbrush according to claim 20, wherein the minimum thickness of the neck is 3.0 mm to 4.2 mm. 一種牙刷，其特徵在於：包括具備 頭部、延伸設置於所述頭部的頸部、及 延伸設置於所述頸部的柄部的柄體，並 於所述頭部的植毛面上藉由平線式植毛植設有多個毛束， 所述頭部的厚度為2.0 mm～4.0 mm， 所述頸部的最小的寬度與最小的厚度中的小的一方為3.0 mm～4.5 mm，並且在藉由下述的方法（α）所測定的所述頭部的彎曲量A與藉由下述的方法（β）所測定的所述頸部的彎曲量B中， 所述彎曲量A為0.4～3.0 mm， 所述彎曲量B為2.1～5.0 mm， 所述彎曲量A與所述彎曲量B的差（B－A）為1 mm≦（B－A）≦4 mm， 所述彎曲量A的以mm所表示的數值與所述彎曲量B的以mm所表示的數值的積為0.84～10， 方法（α）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頭部與所述頸部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起10±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頭部的彎曲量A； 方法（β）：使所述頭部的植毛面朝向鉛垂方向的上方，以將所述頸部與所述柄部的邊界的位置固定的狀態下的所述柄體的前端的高度為基準高度，於所述固定狀態下，進而相對於所述頭部中的植毛部的長軸方向的長度，於自所述植毛部的前端起50±3%的位置上懸掛200 g的秤錘，並將10秒後的所述柄體的前端的自所述基準高度起的高度的位移量（單位為mm）設為所述頸部的彎曲量B。A toothbrush, characterized in that it includes: The head, the neck extending from the head, and Extend the handle body of the handle portion of the neck, and A plurality of hair bundles are arranged on the hair-flocking surface of the head by flat-line hair-flocking, The thickness of the head is 2.0 mm～4.0 mm, The smaller of the smallest width and the smallest thickness of the neck is 3.0 mm to 4.5 mm, and the bending amount A of the head measured by the following method (α) is determined by the following method (α) In the bending amount B of the neck measured by the method (β), The bending amount A is 0.4～3.0 mm, The bending amount B is 2.1～5.0 mm, The difference between the bending amount A and the bending amount B (B-A) is 1 mm≦(B-A)≦4 mm, The product of the value expressed in mm of the bending amount A and the value expressed in mm of the bending amount B is 0.84-10, Method (α): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the head and the neck is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a 200 g weight is hung from the front end of the hair transplanting part at a position of 10±3%, And the amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount A of the head; Method (β): Make the tufted surface of the head face upward in the vertical direction, and use the height of the tip of the shank in a state where the position of the border between the neck and the shank is fixed as a reference Height, in the fixed state, relative to the length of the hair transplanting part in the head in the long axis direction, a weight of 200 g is suspended at a position 50±3% from the front end of the hair transplanting part, The amount of displacement (in mm) of the height of the front end of the handle body from the reference height after 10 seconds is set as the bending amount B of the neck. 如請求項23所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.5 mm，最小的厚度為3.0 mm～4.5 mm。The toothbrush according to claim 23, wherein the minimum width of the neck is 3.0 mm to 4.5 mm, and the minimum thickness is 3.0 mm to 4.5 mm. 如請求項23或24所述的牙刷，其中所述彎曲量A的以mm所表示的數值與所述彎曲量B的以mm所表示的數值的積為2～10。The toothbrush according to claim 23 or 24, wherein the product of the numerical value expressed in mm of the bending amount A and the numerical value expressed in mm of the bending amount B is 2-10. 如請求項23或24所述的牙刷，其中所述彎曲量A為0.5～2.0 mm，所述彎曲量B為2.1～4.0 mm。The toothbrush according to claim 23 or 24, wherein the bending amount A is 0.5 to 2.0 mm, and the bending amount B is 2.1 to 4.0 mm. 如請求項23或24所述的牙刷，其中構成所述毛束的牙刷毛的毛尖強度為1.7 N～3.0 N。The toothbrush according to claim 23 or 24, wherein the tip strength of the toothbrush bristles constituting the tuft is 1.7 N to 3.0 N. 如請求項23或24所述的牙刷，其中所述頸部的最小的寬度為3.0 mm～4.2 mm。The toothbrush according to claim 23 or 24, wherein the smallest width of the neck is 3.0 mm to 4.2 mm. 如請求項23或24所述的牙刷，其中所述柄體的材質為聚丙烯樹脂。The toothbrush according to claim 23 or 24, wherein the material of the handle body is polypropylene resin.
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