Dàn ý Thuyết minh về mũ bảo hiểm(nón bảo hiểm) lớp 9 chi tiết đầy đủ

Ngy nay, phng tin di chuyn ca con ngi cng tr nn tin tin, c nng cp v pht trin ln khng ngng theo thi gian. Bi nhu cu ca con ngi thay i lin tc. Cc t nc pht trin u s dng t nhng mt s nc ang pht trin, c bit l Vit Nam th t l ngi dn s dng xe my rt nhiu. Bi xe my tuy khng i nhanh bng t nhng li nh gn, d i trong cc li hm nho nh. V ngi bn ng hnh khng th thiu vi mi ngi iu khin xe my chnh l chic m bo him – ngi bn bo v u ca chng ta. Vi cng dng v kiu dng a dng, y cng l loi m m Nh nc yu cu ngi tham gia giao thng phi s dng. Khng ch vy, trong mt s lnh vc hot ng cng cn ti m bo him na. V vic lm bi vn thuyt minh v chic m bo him khng ch n gin l lm mt bi vn m cn l hc sinh, ngi c bi hiu hn v cng dng v tm quan trng ca n. Bi vy nu khng tm hiu k th bi vn s khng c , nn ti a ra mt dn chi tit thuyt minh v chic m bo him. T dn , cc em s t vit bi theo ging vn ring ca mnh, to ra c s phong ph cho bi vit.

Dn chi tit thuyt minh v mbo him lp 9

I, M BI

– Dn dt gii thiu vn m bi cp n: Thuyt minh v chic mbo him.

V d

M bi s 1: Xin cho tt c cc bn. Hm nay ti s gii thiu cho cc bn v h hng nh mnh nh. Trc cc bn hy th on xem chng ti l ai no. Ti l mt loi m, bn trong mm, bn ngoi li cng, bo v phn u ca con ngi. ng ri y, ti chnh l m bo him – ngi bn ng hnh trn mi chng ng giao thng hay mt s hot ng c bit ca con ngi.

M bi s 2: Trong mi lnh vc i sng, con ngi u phi cn n nhng cng c, dng c khng th no thiu c. Nu trong hi ha l nhng hp mu, cy ch, bt v, t giy; nu trong thu tha l kim ch, vi vc… th trong khi tham gia giao thng hay tham gia mt s hot ng c bit chnh l chic m bo him.

II, THN BI

* Ngun gc ca mbo him

  • Thc ra chic nn bo him xut hin t rt lu ri, c th thy t trong nhng nm thng chin tranh chng xut hin. l tin thn ca chic m bo him hin i ngy nay.

  • Ngi ta tm thy nhng chic m c su di lng t, trong cc ngi m. Nu nh ai tng xem nhng b phim v Hy Lp c i, v cc v thn trn nh Olympus th t hn s bit n chic m c chp nhn trn nh rt c trng ca ngi La M, Hy Lp c i.

  • Ban u th chic m bo v u ca qun lnh c lm bng da, sau l lm bng kim loi. Sau th m c thay i bo v c khun mt, ch l ra phn mt v mi th. Thi gian dn tri i, nhng triu i phong kin phng ng cng a m bng kim loi vo s dng trong qun i. n chin tranh th gii th nht th Php coi m bo him chnh l trang b tiu chun cho ngi lnh cc mnh kim loi khng bn lm b thng phn u trng yu. Sau th cc nc nh Anh, c v nhiu nc chu u lm theo.

* Hnh dng v cc b phn ca m

  • Chic m bo him c hnh trn hay hnh cu m ly phn u ca ngi s dng m. M c 3 lp gm lp v ngoi, lp v th hai v lp v trong cng; ngoi ra cn c dy quai, mt s m c knh chn gi, ming lt c

  • Lp v ngoi c lm t nha cng siu bn vi nhiu mu sc khc nhau. C nhng chic m cn c in ln hoa vn hay hnh nh ng nghnh ng yu dnh cho cc b na. Khin chic m tr nn p hn rt nhiu.

  • Lp v th hai ngay sau lp nha l mt lp xp gim lc va chm tc ng. Cn lp v trong cng l lp vi mm nhm lp da u khng b tn thng v i ln cng m i, d chu hn.

  • Quai eo thng kh di v c th c ko di hay rt ngn tu . Chic quai m cng nh chic kho cp sch ca tr em vy. Phn kho ci c lm t nha cn phn dy c an t nhng si tng hp.

  • Knh chn gi (nu c) c lm t nha trong sut ngi dng c th nhn thy ng i d dng.

* Phn loi mbo him

  • M bo him na u: Nh tn gi ca n, chic m ny ch bo v na phn u trn v ngi dng c th lng nghe c m thanh m phn x trnh i kp thi. Khng ch vy, trng lng nh cng kiu dng thi trang, gi c r nn c nhiu ngi a chung.

  • M bo him c knh chn gi: Chic m ny c phn knh chn gi c th y ln hoc xung. Lc lng cnh st giao thng ca nc ta hay s dng chic m ny. Bi khi c thm knh th knh s cn li gi, trnh gi tt vo mt khin chng ta kh m mt quan st ng.

  • M bo him c l thng gi: L thng gi ny c thit k thm phn sau u, c bit dnh cho phi n dng khi buc tc. L thng gi s gip phn u khng b dnh m hi v kh thong hn.

  • M bo him m ht phn mt: Loi m ny thng c dng cho cc xe c phn khi ln hay dn pht l ch yu. Loi m ny kh dy v bo v phn u v c phn mt ca ngi dng rt tt. ng thi chn gi, gi m c khi tri lnh.

* Cng dng ca nn

  • M bo him gip bo v phn u ca chng ta. Nh tt c u bit th phn u l phn c quan trng yu rt d b tn thng. Vi lp v cng, m gip gim s va p mnh ca cc vt hay do ng xung ng, t l lm gim nguy c b tai nn vng u, chn thng s no.

  • T ngy s dng m bo him th t l t vong do b tn thng vng u cng gim i ng k. ng thi, m bo him vi kiu dng v mu sc a dng cng kh l hp thi trang.

* Cch s dng v bo qun mbo him

  • Cch s dng m cng v cng n gin. Ch cn i m ln v ci quai l c. Nu quai di th c th chnh cho ngn li v nu quai ngn cng c th chnh cho di ra sao cho va.

  • M bo him cht lng c gi thnh cao hn mt cht nhng li bn v tt hn. Chic m a s lm t nha, v vy khng nn p qu mnh m hay nm m i.

III, KT BI

– Khi qut li mt vi suy ngh ca bn thn v chic nn bo him, cng dng ca mbo him.

V d: Chic m bo him rt quan trng. Bi vy la chn mt chic m cn thn v gi gn n cng chnh l bo v cho tnh mng ca mi chng ta.

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