CN87208812U - 粉笔夹 - Google Patents

粉笔夹 Download PDF

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Publication number
CN87208812U
CN87208812U CN 87208812 CN87208812U CN87208812U CN 87208812 U CN87208812 U CN 87208812U CN 87208812 CN87208812 CN 87208812 CN 87208812 U CN87208812 U CN 87208812U CN 87208812 U CN87208812 U CN 87208812U
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China
Prior art keywords
screw thread
chalk
overcoat
taper seat
clip head
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CN 87208812
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English (en)
Inventor
曾绍强
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Individual
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Individual
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Priority to CN 87208812 priority Critical patent/CN87208812U/zh
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Abstract

一种教具粉笔夹,由外套A和内套B两层构成。外套A上端头部内壁有圆锥面(2)。外套A下部有螺纹腔(11),腔内有螺纹(1),另附有笔挂(3)。内套B下端开槽口(5),中间有螺纹(6),自中点起至上端裂开为4片,裂片(7)末端为夹头(4)。拧动螺纹(1)可以使外套A上下移动,从而夹紧粉笔。本粉笔夹适应各种型号的粉笔,用塑料注塑成型。

Description

本实用新型涉及一种教具。
公知用粉笔书写时,手指拿住粉笔,粉笔易断;每枝粉笔用至余下的15毫米处即不能再用,粉笔消耗量大;手指直接接触粉笔,容易弄脏手和衣服,很不卫生。中国专利局的《实用新型专利公报》第3卷第17号(总第74号)所载,85201499“粉笔笔杆”所披露的技术虽能克服上述缺点,但用上了凸轮锁紧器,结构复杂,成本较高。
本实用新型向公众提供一种使用方便,结构简单,成本低廉的粉笔夹。
本实用新型的具体结构从附图和实施例中给出。
附图说明:粉笔夹的剖面图
本实用新型由外套(A)和内套(B)两层构成。外套(A)为圆筒形,下部内径较大的为螺纹腔(11),螺纹腔(11)内壁有螺纹(1),上端部内壁有圆锥面(2),附有笔挂(3)。内套(B)下端面开有槽口(5),中部处有螺纹(6),螺纹(6)与螺纹(1)相匹配。内套(B)从中部直到上端裂开为4个裂片,每个裂片(7)的端头为笔夹头(4),笔夹头(4)的内表面开有夹齿(8)。笔夹头(4)与裂片(7)之间有圆锥面(10),圆锥面(10)与圆锥面(2)相配合。
本实用新型使用方法是:拧松外套(A)的螺丝(1),外套(A)下移,粉笔(C)从上端笔夹头(4)间放入;再拧紧外套(A)的螺丝(1),外套(A)向上移动,圆锥面(2))压迫圆锥面(10),通过笔夹头(4)上的夹齿(8)来夹紧粉笔(C)。
本实用新型通用性强,可以适应各种型号的粉笔;用塑料注塑成型,宜于机械化生产,结构简单,成本低。

Claims (3)

1、一种教具粉笔夹,有笔挂(3)、笔夹头(4)和螺纹(1),其特征在于粉笔夹由外套A和内套B两层构成;
a、外套A下部有螺纹(11),腔内壁有螺纹(1),上端部内壁有圆锥面(2);
b、内套B下端面开有槽口(5),下部近中点处有螺纹(6),自中点直到上端裂开为4个裂片(7),每个裂片(7)的端头为笔夹头(4),裂片(7)与笔夹头(4)之间有圆锥面(10);
c、外套A上的螺纹(1)与内套B上的螺纹(6)相配合。
2、根据权利要求1所述的粉笔夹,其特征在于外套A上的圆锥面(2)与内套B上的圆锥面(10)相配合。
3、根据权利要求1所述的粉笔夹,其特征在于笔夹头(4)的内壁有夹齿(8)。
CN 87208812 1987-05-28 1987-05-28 粉笔夹 Withdrawn CN87208812U (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 87208812 CN87208812U (zh) 1987-05-28 1987-05-28 粉笔夹

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 87208812 CN87208812U (zh) 1987-05-28 1987-05-28 粉笔夹

Publications (1)

Publication Number Publication Date
CN87208812U true CN87208812U (zh) 1988-04-27

Family

ID=4824018

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 87208812 Withdrawn CN87208812U (zh) 1987-05-28 1987-05-28 粉笔夹

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CN (1) CN87208812U (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109195650A (zh) * 2016-05-31 2019-01-11 赛诺菲-安万特德国有限公司 用于药物输送装置的盖总成以及用于组装盖总成的方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109195650A (zh) * 2016-05-31 2019-01-11 赛诺菲-安万特德国有限公司 用于药物输送装置的盖总成以及用于组装盖总成的方法
US11291776B2 (en) 2016-05-31 2022-04-05 Sanofi-Aventis Deutschland Gmbh Cap assembly for a drug delivery device and method for assembling a cap assembly

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