201143675 六、發明說明： 【發明所屬之技術續域】 發明領域 本發明關於牙刷的改良。 本申請案主張基於2010年3月24日於曰本提申之特願 2010-068132號的優先權，將其之内容引用於此。 t 4标 3 發明背景 一般’牙刷係在預先被設置在握柄件之頭部的植毛 穴，藉由以平線將耐綸及聚對笨二甲酸丁二酯（PBT)之刷毛 .的毛束固定而製造。因為被植毛之毛束係使用平線被對 折’變得不容易從植毛穴脫落。作為頭部之材質，從成本 以及成形性之面來看，聚丙烯(PP)被廣泛使用。 順帶一提，為使以牙刷容易地進行口腔内之每一角 落，特別是後齒的刷掃，毛束被植毛之頭部的厚度以薄者 為佳。例如，於專利文件1，將提升口腔内的操作性作為目 的’提議有以聚縮醛樹脂所構成之握柄件’且同時使頭部 薄化為3〜4mm之牙刷。 【先前技術文件】 【專利文件】 【專利文件1】特開平7_143914號公報。 【發^明内容】 發明概要 發明欲解決的課題 201143675 然而，即使是記載於專利文件1之牙刷，其在於口腔内 的操作性還是有不足，會有產生漏刷的狀況。又，將頭部 薄化的話，會有頭部之耐折強度降低的狀況。又，伴隨強 度降低，有產生因為在頭部之邊緣部份的裂痕或是白化的 產生而造成之外觀不良的狀況。 本發明係有鑑於上述事態者，以提供毛束不容易從植 毛穴脫落，在口腔内操作性優異，且具有充分強度之牙刷 作為目。 用以解決課題之手段 本申請案發明之第1態樣係，具備略呈板狀的頭部，該 頭部在植毛面設置有複數之植毛穴，將刷毛的毛束對折， 把被塞入在其間之平線打入前述植毛穴，藉此將前述毛束 植入設置在前述植毛穴:而成之牙刷，前述頭部之厚度為 2.0〜4.0mm，前述頭部寬度方向最外側的植毛穴與邊緣的最 短距離為0.4〜0.9mm之牙刷。 本申請案發明之第2態樣係，前述第1態樣之牙刷的前 述頭部係以聚對苯二甲酸丁二酯樹脂所構成之牙刷。 發明效果 本發明的牙刷，毛束不容易從植毛穴脫落，口腔内操 作性優異，此外因為具有充分的強度，可防止頭部耐折強 度降低及外觀不良。 圖式簡單說明 第1圖為顯示本發明之牙刷的一實施形態之側面圖。 第2圖為將顯示於第1圖之牙刷的頭部擴大顯示之平面 4 201143675 圖。 【^βΓ" ^ 較佳實施例之詳細說明 用以實施發明之形態 針對本發明之牙刷的一實施形態進行説明。 於第1圖及第2圖，顯示本實施形態的牙刷。本實施形 態之牙刷1 ’係具有握柄件la及毛束lb;其中握柄件ia具備 有頭部10，而將毛束lb植入設置在頭部1〇之植毛穴u。 握柄件la具有，頭部10、於使用時被握持的握持部2〇， 及配置於頭部1〇與握持部2〇之間的頸部3〇。 本貫施形態之握柄件la，係頭部10、握持部2〇與頸部 30係由同一樹脂所構成。 作為構成握柄件la之樹脂，例如，可使用聚對苯二曱 酸丁二酯樹脂(PBT)、聚丙烯樹脂(PP)、聚縮醛樹脂(p〇M)、 及將聚環己烷二亞甲基對苯二甲酸酯 (polycyclohexanedimethyleneterephthalate)之一部份以異 g大 酸取代之樹脂(PCTA)等。 又’作為構成握柄件la之樹脂，以兼備適度之剛性與 靭性之樹酯為佳’以彎曲模量為1900MPA以上且拉伸破損 率為80%以上之樹脂為佳。於此處，「彎曲模量」一詞係指 按照ISO 178所測定之値；「拉伸破損率」一詞係指按照ISO 527-1、2所測定之値。 只要前述彎曲模量為1900MPA以上且前述拉伸破損率 為80°/。以上的話，握柄件1 a的靭性會變得充分地高，即使將 201143675 頭部10薄化，對衝擊也會變得不容易破裂，而可防止破損 斷裂面變為鋭角一事。 前述彎曲模量及前述拉伸破損率之上限雖無特別限 制，只要是通常有被使用之樹脂，彎曲模量為5000MPA以 下且拉伸破損率為500%以下者。 從可容易地滿足上述之彎曲模量及拉伸破損率之點來 看，以聚對苯二甲酸丁二酯樹脂為佳。又，聚對苯二甲酸 丁二酯樹脂在化學抗性及耐熱性為優異的。因此，於握柄 件la使用聚對苯二曱酸丁二酯樹脂之牙刷1，即使長期間使 用劣化也少，而因為即使藉由平線而將毛束lb牢牢地固定 也不容易破裂，而可成為更高品質的。 聚對苯二曱酸丁二酯樹脂，係將對苯二甲酸或是對苯 二曱酸二曱酯與1 ’ 4丁二醇作為原料藉由聚縮合反應所製 造之熱塑性聚酯，例如，可舉寶理塑料有限公司 (Polyplastics co_，ltd.)製的DURANEX、三菱工程塑料公司 (Mitsubishi Engineering-Plastics Corporation)製的 NOVADURAN、東麗公司（TORAYInc.)製的 TORCON 等。 頭部10為略呈平板狀之部分，毛束lb被植入設置在複 數的植毛穴11 ’該等植毛六被設置於植毛面10a。在本實施 形態’頭部10之植毛面10a為略呈矩形狀，寬度方向之兩邊 緣12為相互平行且沿著握柄件la之縱向，最前端側之邊緣 13被作成曲線狀。 頭部10之厚度T為2.0〜4.0mm，而以2.5〜3.5mm為佳。 頭°卩之厚度T未滿2mm的話，因為頭部耐折強度會變低， 6 201143675 在正在刷牙時，頭部10有折損之虞’此外會變得無法確保 用來以平線維持毛束lb之充分的植毛穴丨〖深度。另一方 面，頭部10之厚度T超過4mm的話，口腔内操作性會變得不 充分。 頭部10 ’頭部10之寬度方向（相對於縱向為垂直之方向） 之最外側的植毛穴lla與邊緣12的最短距離w(以下，將此 距離W稱為「緣寬度W」。）為0.4〜〇_9mm，以〇.6〜〇8mm為 佳。頭部10之緣寬度W未滿〇.4mm的話，頭部耐折強产不 足，又，由於植毛而產生之應力，頭部1〇之邊緣部份有變 形的狀況。緣寬度W超過0.9mm的話，相對於頭部之厚 度T，緣寬度W會變廣，最後在刷臼齒等時，頭部1〇接觸齒 肉及頰黏膜而操作性降低，又，成為刷的觸感不良者。 又，在頭部10中，頭部10之縱向最前端側的植毛穴ub 與前端側之邊緣13的最短距離以0.4〜0.9mm為佳。植毛穴 lib與前端側的邊緣13的最短距離未滿0.4mm的話，有頭部 耐折強度不足之虞，而超過0.9mm的話，有口腔内操作性 降低之虞。 握持部20，為具有使用者可握持之長度的棒狀部分。 在握持部20中，為了提升握持性，也可使軟質樹脂部 分地或是整體地被覆。 作為前述軟質樹脂，以硬度(JISK6253硬度測試、測試 條件JISA)為5〜100之軟質樹脂為佳，以20〜60之軟質樹脂為 更佳。只要前述軟質樹脂之硬度為5以上，具有充分的軟質 性並且握持性更加提升。 201143675 為引述軟質樹脂之具體例，可列舉聚稀烴系熱塑性 彈性體、聚笼 1本乙烯糸熱塑性彈性體、聚胺曱酸酯系熱塑性 弓〒j生jr^ t賴系熱塑性彈性體、1，2-聚丁二烯系熱塑性彈 !·生體乙稀-醋酸乙烯酯系熱塑性彈性體、聚氯乙烯系熱塑 十生弓單ij1 生 、天然橡膠系熱塑性彈性體、氟系熱塑性彈性體、 反-聚異戊二烯系熱塑性彈性體等。 作為構成握柄件la之樹脂使用聚對苯二曱酸丁二酯樹 月曰的狀况時’從相容性之點來看，作為軟質樹脂以使用聚 酉曰系熱塑性彈性體為佳。作為聚酯系熱塑性彈性體，例如， 可舉杜邦·東麗有限公司（DU PONT-TORAY CO.，LTD.)製 之Hytrel及三菱化學有限公司製之pRIMALL〇Y等。 頸部30 ’為連結頭部1〇與握持部2〇之間的部分。頸部 30的宽度小於頭部1〇的寬度。由於頸部3〇之寬度小於頭部 10之宽度’變得容易將頭部10插入口腔内。 毛束lb係由被對折之刷毛所構成，將被塞入該被對折 之刷毛間的平線打入植毛穴11，藉此而被固定在頭部10。 作為前述刷毛的材質，例如，可舉聚醯胺(例如，耐綸 6-12、耐綸6-10、12耐綸等）、聚酯（例如，聚對苯二曱酸乙 二酯、聚對苯二曱酸丙二酯、聚對苯二曱酸丁二酯等）、聚 丙烯、彈性體、天然材質等。又，該等材質被組合亦可。 前述刷毛的横斷面形狀沒有特別限定，例如，可舉圓 形狀、三角形狀、四角形狀、六角形狀、花瓣狀、圓弧狀 等。又，將該等形狀組合亦可。 又，亦可預先將刷毛加工為波浪狀、扭曲狀、曲折狀 8 201143675 等。 前述刷毛的外徑以3〜15mil(即，ο』％〜〇 38lmm)為佳、 以5〜lOmil(即，0.127〜0.254mm)為更佳。 又，各刷毛，除通㊉形成在則述刷毛前端的圓形毛尖 部外，可為略呈同一徑之普通毛，亦可為隨著朝向災端外 徑逐漸變細之錐化毛。亦可將該等普通毛與錐化毛混毛， 亦可每個植毛六11改變。錐化毛係，毛尖往狹窄缝隙之進 入性佳，可實現柔軟的觸感，對齒頸部的刷掃和按摩更為 適合。 作為前述錐化毛，例如，可舉如同記載於特開平 6-141923號公報之兩端被錐化加工的錐化毛、如同記載於 特開昭57-50220號公報之僅一端被錐化加工的錐化毛、如 同記載於特開2002-58838號公報之在丨根的毛上形成有多 數尖銳部的錐化毛、如同記載於特開平9_322821號公報之 具有島狀組織的錐化毛、如同記載於特開2〇〇1 178542號公 報之芯鞘構造的錐化毛等。 前述刷毛的長度以7〜ISmm為佳、以8〜13mm為更佳。 又’前述刷毛的長度全部為相同的也可，不為相同的也可。 由全毛束lb之前端所形成之刷掃面，例如，相對於植 毛面U)a為平行的平面；亦可作成相對於植毛面⑽傾斜的 平面；沿著縱向相對於植毛面1Ga為逐漸分離或是逐漸接近 1曲面、凸面、凹面、或是波狀的凹凸面。從前述容易刷 掃之點來看，以從前端隨著朝向後端逐漸接近植毛面心之 方式傾斜的平面或曲面為佳。 201143675 前述平線的長度，以能確實地固定刷毛且不會使在頭 部10產生破裂及白化的長度為佳。具體的說，較植毛穴11 長0.3〜0.5mm長的平線為佳。 前述平線的高度雖未被特別限定，為了能確保充分的 打入強度且同時確保植毛適性，以0.9〜2.0mm的範圍為佳。 又，從同樣的理由，平線的厚度以0.20〜0.25mm為佳。 又，前述平線的打入角度被適宜選擇，為避免破裂及 白化的產生，以相對於握柄件la之縱向5〜80。的範圍為佳， 以15〜30。的範圍為更佳。前述平線的打入角度係全部的平 線為相同的也可，不一樣的也可。 作為前述平線的材質，雖可使用金屬、塑膠等，從強 度、生産性、以及成本之點來看，以金屬為佳，以黃銅或 是鋁為更佳。 而於前述平線的表面，為作成使從植毛穴1丨不容易脫 落’也可形成有溝及細微的凹凸。 在本實施形態的話，植毛穴11係圓形狀並被格子狀地 配置在頭部10的植毛面l〇a。 針對植毛穴11之深度方向的形狀，可為相對深度方向 形狀沒有變化的圆柱形狀，亦可為如同隨著朝向下方穴徑 變小之錐化狀，在穴之中途形成有高低差之形狀亦可。又， 咼低差與錐化為各自形成之形狀亦可◦又，亦可於植毛穴 11之底部施有〇_3mm程度的倒角加工。 植毛穴11之開口部的穴徑以1 〇〜2.〇mm(即，面積 〇·75〜3.lmm2)為佳。藉由在這樣的穴徑植毛毛束讣，對齒 10 201143675 酿部的觸感變佳，可做出往齒間部等細的縫隙毛尖的插入 實感高的牙刷。 以上説明之牙刷1的話，因為頭部10之厚度T為2.0mm 以上且緣寬度W為0.4mm以上，可確保充分的強度，其結 果，可防止頭部耐折強度降低及外觀不良。又，牙刷1的話， 因為頭部10之厚度T為4.0mm以下且緣寬度W為0.9mm以 下，可防止頭部10對口腔内的接觸，其結果為口腔内操作 性優異。 又，牙刷1的話，因為毛束lb藉由平線固定在植毛穴 11，變得不容易脫落。 且，本發明並未被限定於上述實施形態。 將頭部10、握持部20與頸部30三者不以相同的樹脂來 構成亦可。 又，頭部10，如同上述實施形態，雖以整體的相同厚 度在前述範圍内為佳，頸部30側的一部，較佳是頭部10之 長度的1/3以下變厚的話亦可。藉由將頭部10之頸部30側做 厚，可使與頸部30平滑連接。 又，在本發明的牙刷中，頸部30亦可被省略。即，握 柄件係由頭部10與握持部20所構成亦可。 又，頭部10，植毛面10a也可不是略呈矩形狀，例如， 即使是圓形狀、楕圓形狀等亦可。 植毛穴11之開口部的形狀，在圓形狀以外，例如，即 使是圓形、三角形、四角形等的多角形及其他之形狀亦可。 又，可將全部的植毛穴11作成同樣的開口部形狀，亦可組 201143675 合2個以上之開口部形狀。 植毛穴11的配置模式可為千鳥狀(staggered in-line)，亦 可為在頭部10之宽度方向兩端側的端部’於頭部10之中央 側形成彎曲的圓弧狀的植毛穴群的模式亦可。 具有如同上述之圓弧狀的植毛穴群的情況時，毛束lb 容易密接於齒頸部。就提高齒面的刷掃實感之點，以被植 毛於圓弧狀之植毛穴群的毛束lb，較被植毛於前述植毛穴 群以外之植毛穴的毛束lb還長為佳。該情況時，平均刷毛 長的差以0.3~2.0mm為佳’以0.5〜1.5mm為更佳。 本發明的話’雖也可將毛束lb本身作成圓弧狀，在該 情況也是’以將設置在頭部10之寬度方向兩端側的端部之 圓弧狀的毛束1 b作成長於該等以外的毛束1 b為佳。 實施例 在以下的例中，使用下述的樹脂。 聚對苯二甲酸丁二醋（PBT):三菱工程塑料公司製 NOVADURAN5010 將聚環己烧二亞甲基對笨二甲酸醋之-部份以異酜酸 取代之樹脂(PCTA):伊士曼化卫公司（East_ Company)BR203201143675 VI. Description of the Invention: [Technical Field to which the Invention pertains] Field of the Invention The present invention relates to an improvement of a toothbrush. The priority of the present application is based on the priority of Japanese Patent Application No. 2010-068132, the entire disclosure of which is hereby incorporated by reference. t 4 mark 3 BACKGROUND OF THE INVENTION Generally, a toothbrush is attached to a planting hole previously provided at the head of the grip member, and the bristles of nylon and polybutylene dicarboxylate (PBT) are spliced by a flat wire. Fixed and manufactured. Because the hair bundles that are implanted are folded in a flat line, it becomes difficult to fall off from the planting hole. As a material of the head, polypropylene (PP) is widely used in terms of cost and formability. Incidentally, in order to easily carry out each corner of the oral cavity with a toothbrush, particularly the brushing of the posterior teeth, the thickness of the head of the hair bundle is preferably thin. For example, in Patent Document 1, the operability in the oral cavity is promoted as a toothbrush which proposes a handle member composed of a polyacetal resin and which simultaneously thins the head to 3 to 4 mm. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei 7-143914. [Brief Description of the Invention] Summary of the Invention Problems to be Solved by the Invention 201143675 However, even in the toothbrush described in Patent Document 1, the operability in the oral cavity is insufficient, and a brush may be generated. Further, if the head is thinned, the folding strength of the head may be lowered. Further, as the strength is lowered, there is a situation in which the appearance is poor due to cracks or whitening at the edge portion of the head. The present invention has been made in view of the above-mentioned circumstances, and it is intended to provide a toothbrush which is excellent in operability in the oral cavity and which has sufficient strength in the case where the hair bundle is not easily detached from the planting hole. Means for Solving the Problem A first aspect of the invention of the present application includes a slightly plate-shaped head having a plurality of planting holes on a hair-planting surface, and folding the hair bundles of the bristles into a head. In the flat line therebetween, the aforementioned hair-planting hole is inserted, thereby implanting the hair bundle into the toothbrush which is disposed in the aforementioned planting hole, the thickness of the head is 2.0 to 4.0 mm, and the outermost planting of the head width direction The toothbrush with the shortest distance between the hair and the edge is 0.4~0.9mm. According to a second aspect of the invention, in the toothbrush of the first aspect, the head of the toothbrush is a toothbrush composed of a polybutylene terephthalate resin. EFFECTS OF THE INVENTION In the toothbrush of the present invention, the hair bundle is less likely to fall off from the planting hole, and is excellent in handleability in the oral cavity. Further, since it has sufficient strength, it is possible to prevent the head from being reduced in folding strength and appearance. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view showing an embodiment of a toothbrush of the present invention. Fig. 2 is a plan view showing the enlarged surface of the head of the toothbrush shown in Fig. 1 201143675. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments for Carrying Out the Invention An embodiment of a toothbrush according to the present invention will be described. The toothbrush of this embodiment is shown in Fig. 1 and Fig. 2 . The toothbrush 1' of the present embodiment has a grip member 1a and a tuft lb; wherein the grip member ia is provided with a head portion 10, and the tufts lb are implanted in the planting pockets u provided at the head portion 1b. The grip member 1a has a head portion 10, a grip portion 2b that is gripped during use, and a neck portion 3配置 disposed between the head portion 1〇 and the grip portion 2〇. In the present embodiment, the grip member la, the head portion 10, the grip portion 2, and the neck portion 30 are made of the same resin. As the resin constituting the grip member la, for example, polybutylene terephthalate resin (PBT), polypropylene resin (PP), polyacetal resin (p〇M), and polycyclohexane can be used. A part of polycyclohexane dimethylene terephthalate (PCA) substituted with an iso-g-acid. Further, as the resin constituting the grip member la, a resin having an appropriate rigidity and toughness is preferable, and a resin having a flexural modulus of 1900 MPA or more and a tensile breakage ratio of 80% or more is preferable. Here, the term "bending modulus" means the enthalpy measured in accordance with ISO 178; the term "tensile breakage rate" means enthalpy measured in accordance with ISO 527-1, 2. As long as the aforementioned flexural modulus is 1900 MPA or more and the aforementioned tensile breakage ratio is 80 °/. In the above case, the toughness of the grip member 1a becomes sufficiently high, and even if the head portion 10 of 201143675 is thinned, the impact is less likely to be broken, and the broken surface is prevented from becoming a corner. The upper limit of the flexural modulus and the tensile breakage rate is not particularly limited, and may be any resin which is usually used, and has a flexural modulus of 5,000 MPA or less and a tensile breakage ratio of 500% or less. From the viewpoint that the above-mentioned flexural modulus and tensile breakage rate can be easily satisfied, a polybutylene terephthalate resin is preferred. Further, the polybutylene terephthalate resin is excellent in chemical resistance and heat resistance. Therefore, the toothbrush 1 using the polybutylene terephthalate resin in the grip member la is less deteriorated even in a long period of use, and since the hair bundle 1b is firmly fixed even by a flat wire, it is not easily broken. And can become higher quality. Polybutylene terephthalate resin is a thermoplastic polyester produced by polycondensation reaction using terephthalic acid or dinonyl phthalate and 1 '4 butanediol as a raw material, for example, For example, DURANEX manufactured by Polyplastics Co., Ltd., NOVADURAN manufactured by Mitsubishi Engineering-Plastics Corporation, TORCON manufactured by Toray Inc., and the like can be used. The head portion 10 is a slightly flat portion, and the hair bundles 1b are implanted in a plurality of planting hairs 11' which are disposed on the hair-growing surface 10a. In the present embodiment, the hair-growing surface 10a of the head portion 10 has a substantially rectangular shape, and the two edges 12 in the width direction are parallel to each other and along the longitudinal direction of the grip member la, and the edge 13 on the foremost end side is formed in a curved shape. The thickness T of the head 10 is 2.0 to 4.0 mm, and preferably 2.5 to 3.5 mm. If the thickness T of the head 卩 is less than 2 mm, the head folding strength will be low. 6 201143675 When the tooth is being brushed, the head 10 is damaged. In addition, it becomes impossible to ensure that the hair bundle is maintained in a flat line. The full planting hole of lb is 〖depth. On the other hand, if the thickness T of the head portion 10 exceeds 4 mm, the operability in the oral cavity may become insufficient. The shortest distance w between the outermost planting hole 11a and the edge 12 in the width direction of the head portion 10 (the direction perpendicular to the longitudinal direction) (hereinafter, this distance W is referred to as "edge width W"). 0.4~〇_9mm, preferably 〇.6~〇8mm. When the width W of the edge of the head 10 is less than 〇4 mm, the head is not strong enough to withstand the folding, and the stress generated by the planting of the hair is deformed at the edge portion of the head. When the edge width W exceeds 0.9 mm, the edge width W becomes wider with respect to the thickness T of the head, and finally, when brushing the teeth or the like, the head 1 contacts the tooth and the buccal mucosa, and the operability is lowered, and the brush becomes Poor touch. Further, in the head portion 10, the shortest distance between the planting pocket ub on the longitudinal most distal end side of the head portion 10 and the edge 13 on the distal end side is preferably 0.4 to 0.9 mm. When the shortest distance between the plucking hole lib and the edge 13 on the distal end side is less than 0.4 mm, the head has a defect strength of less than 0.9 mm, and if it is more than 0.9 mm, the operability in the oral cavity is lowered. The grip portion 20 is a rod-shaped portion having a length that the user can grip. In the grip portion 20, the soft resin may be partially or entirely covered in order to improve the grip. As the soft resin, a soft resin having a hardness (JIS K6253 hardness test, test condition JISA) of 5 to 100 is preferable, and a soft resin of 20 to 60 is more preferable. As long as the hardness of the soft resin is 5 or more, it has sufficient softness and the grip property is further improved. 201143675 Specific examples of the soft resin include a polyolefin-based thermoplastic elastomer, a poly-cage 1, a vinyl-ruthenium thermoplastic elastomer, a polyamine phthalate-based thermoplastic elastomer, and a thermoplastic elastomer. , 2-polybutadiene-based thermoplastic elastomers! · Bio-ethylene-vinyl acetate-based thermoplastic elastomers, polyvinyl chloride-based thermoplastics, ij1 raw, natural rubber-based thermoplastic elastomers, fluorine-based thermoplastic elastomers A trans-polyisoprene-based thermoplastic elastomer or the like. When the polybutylene terephthalate tree ruthenium is used as the resin constituting the grip member la, it is preferable to use a polyfluorene-based thermoplastic elastomer as the soft resin from the viewpoint of compatibility. Examples of the polyester-based thermoplastic elastomer include Hytrel manufactured by DU PONT-TORAY CO., LTD., and pRIMALL® Y manufactured by Mitsubishi Chemical Corporation. The neck portion 30' is a portion that connects the head portion 1'' to the grip portion 2''. The width of the neck 30 is less than the width of the head 1 。. Since the width of the neck 3〇 is smaller than the width of the head 10, it becomes easy to insert the head 10 into the oral cavity. The tuft lb is composed of the bristles which are folded in half, and the flat line which is inserted between the bristles which are folded in is inserted into the planting hole 11, thereby being fixed to the head 10. Examples of the material of the bristles include polydecylamine (for example, nylon 6-12, nylon 6-10, 12 nylon, etc.), polyester (for example, polyethylene terephthalate, poly Polypropylene terephthalate, polybutylene terephthalate, etc., polypropylene, elastomer, natural materials, and the like. Moreover, these materials can be combined. The cross-sectional shape of the bristles is not particularly limited, and examples thereof include a circular shape, a triangular shape, a square shape, a hexagonal shape, a petal shape, and an arc shape. Moreover, these shapes may be combined. Further, the bristles may be processed into a wave shape, a twist shape, or a meander shape in advance 8 201143675 and the like. The outer diameter of the bristles is preferably 3 to 15 mils (i.e., ο"% to 〇 38 lmm), more preferably 5 to 10 mils (i.e., 0.127 to 0.254 mm). Further, each of the bristles may be a normal hair having a similar diameter except for the rounded hair tip at the tip end of the bristles, or may be a tapered hair which is tapered toward the outer diameter of the catastrophic end. It is also possible to mix the ordinary hair with the tapered hair, or to change each of the hairs. The tapered hair system has a good penetration into the narrow gap and can achieve a soft touch. It is more suitable for brushing and massaging the tooth neck. For example, the taper hair which is tapered at both ends of the Japanese Patent Publication No. Hei 6-141923, and the one end of which is described in JP-A-57-50220, is tapered. The tapered bristles of the stalks of the stalks of the stalks of the stalks of the stalks of the stalks of the stalks of The tapered hairs of the core-sheath structure described in Japanese Laid-Open Patent Publication No. H1 178542. The length of the bristles is preferably 7 to ISmm, more preferably 8 to 13 mm. Further, the lengths of the bristles may be the same or not, and may not be the same. The brushing surface formed by the front end of the whole hair bundle lb, for example, a plane parallel to the hair-planting surface U)a; or a plane inclined with respect to the hair-planting surface (10); gradually along the longitudinal direction relative to the hair-planting surface 1Ga Separate or gradually approach a curved surface, convex surface, concave surface, or wavy concave and convex surface. From the point of view of the above-mentioned easy-to-sweep, it is preferable to use a plane or a curved surface which is inclined from the front end toward the rear end toward the center of the hair-planting face. 201143675 The length of the aforementioned flat wire is preferably such that the bristles can be surely fixed without causing cracks and whitening at the head portion 10. Specifically, it is better to have a flat line with a length of 0.3 to 0.5 mm longer than the hairy hole. The height of the flat wire is not particularly limited, and it is preferably in the range of 0.9 to 2.0 mm in order to ensure sufficient penetration strength and at the same time ensure hairiness. Further, for the same reason, the thickness of the flat wire is preferably 0.20 to 0.25 mm. Further, the angle of penetration of the aforementioned flat wire is suitably selected to avoid cracking and whitening, and is 5 to 80 with respect to the longitudinal direction of the grip member la. The range is good, to 15~30. The range is better. The angle of the above-mentioned flat line is the same for all the flat lines, and it may be different. As the material of the flat wire, metal, plastic, or the like can be used. From the viewpoint of strength, productivity, and cost, it is preferable that metal is preferable, and brass or aluminum is more preferable. On the other hand, the surface of the flat wire is formed such that it is not easily detached from the planting hole 1 and grooves and fine irregularities are formed. In the present embodiment, the planting hole 11 is formed in a circular shape and arranged in a lattice shape on the hair-growing surface 10a of the head portion 10. The shape of the depth direction of the hair-planting hole 11 may be a cylindrical shape having no change in the shape in the depth direction, or may be a tapered shape which becomes smaller toward the lower hole diameter, and a shape having a height difference in the middle of the hole is also formed. can. Further, the shape of the depression and the taper may be different, and a chamfering process of about 3 mm may be applied to the bottom of the planting hole 11. The hole diameter of the opening portion of the planting hole 11 is preferably 1 〇 to 2. mm (i.e., the area 〇·75 to 3.l mm 2 ). By arranging the hair bundles at such a hole diameter, the touch of the tooth portion 10 201143675 is improved, and a toothbrush having a high insertion force into the thin gap of the interdental portion can be made. In the case of the toothbrush 1 described above, since the thickness T of the head portion 10 is 2.0 mm or more and the edge width W is 0.4 mm or more, sufficient strength can be secured, and as a result, the head endurance strength can be prevented from being lowered and the appearance is poor. Further, in the case of the toothbrush 1, since the thickness T of the head portion 10 is 4.0 mm or less and the edge width W is 0.9 mm or less, contact between the head portion 10 in the oral cavity can be prevented, and as a result, the oral operability is excellent. Further, in the case of the toothbrush 1, since the tufts 1b are fixed to the planting pockets 11 by the flat wires, they are less likely to fall off. Furthermore, the present invention is not limited to the above embodiment. The head 10, the grip portion 20, and the neck portion 30 may be formed of the same resin. Further, the head portion 10 is preferably in the above-described range with the same thickness as the whole, and a portion of the neck portion 30, preferably 1/3 or less of the length of the head portion 10, may be thickened as in the above embodiment. . By making the neck portion 30 of the head 10 thick, it is possible to smoothly connect with the neck portion 30. Further, in the toothbrush of the present invention, the neck portion 30 may also be omitted. That is, the grip member may be constituted by the head portion 10 and the grip portion 20. Further, the head portion 10 and the hair-planting surface 10a may not be slightly rectangular, and may be, for example, a circular shape or a rounded shape. The shape of the opening portion of the planting hole 11 may be a polygonal shape such as a circle, a triangle, a square or the like, and other shapes, other than the circular shape. Further, all of the hair-planting holes 11 can be formed into the same opening shape, and the shape of the opening of the 201143675 can be combined with two or more. The configuration pattern of the hair-planting hole 11 may be a staggered in-line, or may be a curved arc-shaped planting hole on the central side of the head portion 10 at the end portions on both end sides in the width direction of the head portion 10. The group mode is also available. In the case of the group of the planting hairs having the arc shape as described above, the hair bundle lb is easily adhered to the tooth neck portion. In order to improve the real feeling of the tooth surface, it is preferable that the hair bundle lb which is planted in the arc-shaped planting hair group is longer than the hair bundle lb which is planted in the hair-planting hole other than the aforementioned hair-planting group. In this case, the difference in the average bristle length is preferably 0.3 to 2.0 mm, and more preferably 0.5 to 1.5 mm. In the case of the present invention, the hair bundles 1b themselves may be formed in an arc shape, and in this case, the arc-shaped hair bundles 1 b provided at the end portions on both end sides in the width direction of the head portion 10 are grown. Hair bundles 1 b other than the others are preferred. Examples In the following examples, the following resins were used. Polybutylene terephthalate (PBT): NOVADURAN 5010 manufactured by Mitsubishi Engineering Plastics Co., Ltd. Polyetherate dimethylene to benzoic acid vinegar - Partially substituted with isodecanoic acid (PCTA): Eastman East_ Company BR203
聚丙浠（PP):普瑞曼聚合物公司（pHme p〇lymer c〇 . Ltd.)製 J700GP 聚縮醛（POM).旭化成化學公司（Ashahi Kasei Chemicals Co. Ltd.)製HC490 又，將使用之樹脂的f曲模量按照IS〇 178測定。將拉 12 201143675 伸破損率按照IS〇 527_卜2測定。將其等之結果顯示於表【。 (實施例1〜8、比較例1〜3) 使用於表1所示的樹脂射出成形，來製作植毛穴之穴徑 為1.55mm及植毛穴間之距離為0.725mm ’且具備於表！所示 之厚度W、寬度L、以及緣寬度w之頭部與握持部與頸部 的握柄件。 接著’將從耐綸而成之刷毛（用毛：8mi卜長度：9.〇mm、 平切）的毛束對折，於其折返部分夾入平線（寬度：13mm、 長度：2.1mm、厚度：0.25mm)並插入形成於頭部之植毛穴， 而將毛束植入設置。藉此，獲得牙刷。 將所獲得之各牙刷的口腔内操作性、頭部耐折強度、 也束保持強度以及外觀如以下進行評價。將評價結果顯示 於表1。 (1)口腔内操作性 將各實施例及各比較例的牙刷給10人的受試者實際地 使用，針對在口腔内之牙刷的操作性，以以下的基準給點 數。接著’依10人的平均値評價口腔内操作性。點數較高 在口腔内操作性優異。 〔點數基準〕 7點：非常好。 6點：不錯。 5點：稍好。 4點：兩邊都說不上。 3點：稍差。 13 201143675 2點：頗差。 1點：非常差。 〔評價基準〕 ◎:平均値5.5點以上 〇 :平均値5.0點以上未滿5.5點 △:平均値4.0點以上未滿5.0點 X :平均値未滿4.0點 (2) 頭部耐折強度 切斷牙刷之刷毛從植毛穴出露的部分，將頭部的植毛 面側弄平滑。其後，固定於東洋精機製作所有限公司製伊 佐德衝擊測試機，從植毛面側藉錘給予衝擊，測定頭部破 損斷裂時之衝擊能量（測定數10)，求取平均値。接著，以以 下的基準評價。 〔評價基準〕Polypropylene (PP): J700GP polyacetal (POM) manufactured by pHme p〇lymer c〇. Ltd.. HC490 manufactured by Ashahi Kasei Chemicals Co. Ltd. The f-modulus of the resin was measured in accordance with IS 178. The tensile damage rate of the pull 12 201143675 is measured according to IS〇 527_卜2. The results of these are shown in the table [. (Examples 1 to 8 and Comparative Examples 1 to 3) The resin injection molding shown in Table 1 was used to produce a planting hole having a hole diameter of 1.55 mm and a distance between the planting holes of 0.725 mm' and having the table! The thickness W, the width L, and the handle of the grip portion and the neck are shown in the thickness W, the width L, and the edge width w. Then, 'the bristles made of nylon (with hair: 8mi length: 9. 〇mm, flat cut) are folded in half, and the flat line is sandwiched in the folded portion (width: 13mm, length: 2.1mm, thickness) : 0.25 mm) and insert the hair fossa formed on the head, and the hair bundle is implanted. Thereby, a toothbrush is obtained. The in-oral operability, the head endurance strength, the bundle holding strength, and the appearance of each of the obtained toothbrushes were evaluated as follows. The evaluation results are shown in Table 1. (1) Intra-oral operability The toothbrushes of the respective examples and the comparative examples were actually used by a subject of 10 persons, and the operability of the toothbrush in the oral cavity was given to the following points on the basis of the following criteria. Then, the oral operability was evaluated based on the average 10 of 10 people. Higher points The operability is excellent in the oral cavity. [Point benchmark] 7: Very good. 6: Yes. 5: A little better. 4: Nothing can be said on either side. 3 points: A little worse. 13 201143675 2 points: quite poor. 1 point: Very bad. [Evaluation Criteria] ◎: Average 値 5.5 points or more 〇: Average 値 5.0 points or more and less than 5.5 points △: Average 値 4.0 points or more and less than 5.0 points X: Average 値 less than 4.0 points (2) Head folding strength cut The part of the bristles of the broken toothbrush is exposed from the hair-planting hole, and the side of the hair-planting surface of the head is smoothed. Thereafter, it was fixed to an Izod impact tester manufactured by Toyo Seiki Co., Ltd., and the impact was applied from the side of the hair-gathering side to measure the impact energy at the time of head breakage (measurement number 10), and the average enthalpy was obtained. Next, the evaluation was based on the following criteria. [evaluation benchmark]
〇 :平均値0.3J以上 △:平均値0.15J以上未滿0.3J X :平均値未滿0.15J (3) 毛束保持強度 將1穴中之全刷毛藉由專用器具握持，使用島津製作所 製Autograph測定毛束從植毛穴脫落為止的最大拉伸應力 (N)(拉伸速度20mm/分間）(N=20)，以以下的基準評價。毛 束保持強度較高，毛束不容易脫落。 〔評價基準〕 〇 :平均値20N以上 14 201143675 △:平均値10N以上未滿20N X :平均値未滿10N (4)外觀 各實施例及各比較例的牙刷各製作10支，藉由目視頭 部之邊緣部份的變形、裂痕、白化及翹曲的產生，據下述 評價基準來評價。 〔評價基準〕 〇 :變形•破裂.白化•翹曲的產生率：0°/。 △:變形•破裂•白化•翹曲的產生率：未滿20% X :變形.破裂.白化•翹曲的產生率：20%以上 15 201143675 比較例 PBT 2400 120 Ο ΓΛ od o X 〇 〇 〇 PBT 2400 120 Ο 产Η o X 〇 〇 〇 i—Η PBT 2400 120 ο m in m O ◎ X 〇 X 實施例 00 POM 3100 m ο ίΠ o ◎ 〇 〇 < 卜 1900 〇 ο m 卜 o ◎ 〇 < < PCTA 1900 310 ο m l> o ◎ 〇 〇 <] un PBT 2400 120 ο m O) d 〇 〇 〇 〇 寸 PBT 2400 120 ο m in c*^ 寸 o ◎ < 〇 〇 m PBT 2400 120 ο iT) c*^ 卜 o 〇 〇 〇 〇 (N PBT 2400 120 ο m m r^ d ◎ 〇 〇 〇 PBT 2400 120 ο (Ν o d ◎ < 〇 〇 握柄件的樹脂 彎曲模量(MPa) 拉伸破損率（％) 頭部厚度T(mm) 頭部寬度L(mm) 緣寬度W(mm) 口腔内操作性 頭部耐折強度 毛束保持強度 外觀 16 201143675 — >頭部的厚度τ為2·0〜4_〇mm且緣寬度w為〇 4〜〇 9mm之 κ施例1〜8的牙刷的話，在口腔内操作性優異。其中，以聚 對笨二甲酸丁二酯樹脂作為握柄件之樹脂之實施例i〜5的 牙席】的法，在外觀優異並具有充分的頭部耐折強度。又， 以聚丙烯樹脂作為握柄件之樹脂之實施例7以外的實施例 1〜6以及8的牙刷的話，具有高的毛束保持強度。 相對於此，頭部的緣寬度W未滿〇.4mm之比較例1的牙 刷’碩部耐折強度低，看來也外觀不良。 頌部的厚度T超過4.0mm之比較例2的牙刷，以及頭部 的緣寬度W超過0_9之比較例3的牙刷，口腔内操作性係低 的。 產業上之可利用性 本發明，因為可提供毛束不容易從植毛穴脫落，在口 腔内操作性優異，而且具有充分之強度的牙刷，在産業上 極為有用。 【圖式簡單説明】 第1圖為顯示本發明之牙刷的一實施形態之側面圖。 第2圖為將顯示於第1圖之牙刷的頭部擴大顯示之平面 圖。 【主要元件符號說明】 1···牙刷 10a…植毛面 la···握柄件 11、11a、lib…植毛穴 lb...毛束 12、13…邊緣 10…頭部 20…握持部 17 201143675 •頸部 30. 18〇: average 値0.3J or more △: average 値0.15J or more and less than 0.3JX: average 値 less than 0.15J (3) Hair bundle retention strength The full bristles in one hole are held by special equipment, using Shimadzu Corporation Autograph measured the maximum tensile stress (N) (stretching speed: 20 mm/min) (N=20) of the hair bundle from the hairy hole, and evaluated it on the following basis. The hair bundle maintains a high strength and the hair bundle does not easily fall off. [Evaluation Criteria] 〇: average 値20N or more 14 201143675 △: average 値10N or more and less than 20N X: average 値 less than 10N (4) Appearance Each of the examples and the comparative examples of the toothbrushes are made of 10 pieces, with the visual head The deformation, crack, whitening, and warpage of the edge portion of the portion were evaluated according to the following evaluation criteria. [Evaluation Criteria] 〇 : Deformation • Cracking. Whitening • Warpage generation rate: 0°/. △: deformation, cracking, whitening, warpage, generation rate: less than 20% X: deformation, cracking, whitening, warpage generation rate: 20% or more 15 201143675 Comparative example PBT 2400 120 Ο od od o X 〇〇〇 PBT 2400 120 Ο Η o X 〇〇〇i-Η PBT 2400 120 ο m in m O ◎ X 〇X Example 00 POM 3100 m ο Π Π o ◎ 〇〇 < 1900 〇 ο m 卜 o ◎ 〇 < ; < PCTA 1900 310 ο m l> o ◎ 〇〇<] un PBT 2400 120 ο m O) d P inch PBT 2400 120 ο m in c*^ inch o ◎ < 〇〇m PBT 2400 120 ο iT) c*^ 卜o 〇〇〇〇 (N PBT 2400 120 ο mmr^ d ◎ 〇〇〇PBT 2400 120 ο (Ν od ◎ < resin bending modulus (MPa) of the grip handle Tensile damage rate (%) Head thickness T (mm) Head width L (mm) Edge width W (mm) Oral working head head folding strength Hair bundle retention strength appearance 16 201143675 — > Head thickness τ In the case of a toothbrush having a width of w of 4·0 to 4 mm and a width w of 〇4 to 〇9 mm, the toothbrushes of Examples 1 to 8 are excellent in handleability in the oral cavity. The method of the butyl succinate resin as the resin of the handle member of the examples i to 5 is excellent in appearance and has sufficient head folding strength. Further, the resin of the polypropylene resin is used as the handle member. In the case of the toothbrushes of Examples 1 to 6 and 8 other than Example 7, the hair bundle holding strength was high. On the other hand, the toothbrush of the comparative example 1 of the head having a width W of less than 4 mm was resistant to folding. The toothbrush of Comparative Example 2 in which the thickness T of the crotch portion exceeds 4.0 mm and the toothbrush of Comparative Example 3 in which the edge width W of the head exceeds 0-9 is low in the oral cavity. UTILITY OF THE INVENTION The present invention is extremely useful in the industry because it can provide a toothbrush which is not easily detached from the planting hole, has excellent handleability in the oral cavity, and has sufficient strength. [Simplified illustration] Fig. 1 Fig. 2 is a plan view showing an enlarged view of a head of the toothbrush shown in Fig. 1. [Description of main components] 1···Toothbrush 10a...planting surface la· ··Handle parts 11, 11a, lib ...planting hair lb...hair bundle 12,13...edge 10...head 20...grip 17 201143675 •neck 30. 18