TW200742805A - Screw, punch and screw driver bit - Google Patents

Screw, punch and screw driver bit

Info

Publication number
TW200742805A
TW200742805A TW095116664A TW95116664A TW200742805A TW 200742805 A TW200742805 A TW 200742805A TW 095116664 A TW095116664 A TW 095116664A TW 95116664 A TW95116664 A TW 95116664A TW 200742805 A TW200742805 A TW 200742805A
Authority
TW
Taiwan
Prior art keywords
fan
screw
head
punch
curved
Prior art date
Application number
TW095116664A
Other languages
Chinese (zh)
Other versions
TWI300110B (en
Inventor
Chao-Wei Lin
Original Assignee
Kwantex Res Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kwantex Res Inc filed Critical Kwantex Res Inc
Priority to TW95116664A priority Critical patent/TWI300110B/en
Publication of TW200742805A publication Critical patent/TW200742805A/en
Application granted granted Critical
Publication of TWI300110B publication Critical patent/TWI300110B/en

Links

Landscapes

  • Forging (AREA)

Abstract

A screw includes a shank and a head. The head is provided with a thread. The head is connected to the shank and includes a drive recess, which includes a plurality of fan-shaped grooves and a square groove. The fan-shaped grooves are equidistantly disposed on and around the drive recess. The square groove is formed at the center of the fan-shaped grooves. The fan of each fan-shaped groove includes at least one first curved line, two second curved lines and two straight lines. Two ends of the second curved line are respectively connected to the first curved line and the straight line, whereby pointed tips of the fan-shaped groove of the drive recess is curved so as to avoid forming the pointed tips of the fan-shaped groove. In addition, a punch is used for forging the screw head of the present invention, and a screw driver bit is used for driving the screw head of the present invention.
TW95116664A 2006-05-11 2006-05-11 Screw, punch and screw driver bit TWI300110B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW95116664A TWI300110B (en) 2006-05-11 2006-05-11 Screw, punch and screw driver bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW95116664A TWI300110B (en) 2006-05-11 2006-05-11 Screw, punch and screw driver bit

Publications (2)

Publication Number Publication Date
TW200742805A true TW200742805A (en) 2007-11-16
TWI300110B TWI300110B (en) 2008-08-21

Family

ID=45069880

Family Applications (1)

Application Number Title Priority Date Filing Date
TW95116664A TWI300110B (en) 2006-05-11 2006-05-11 Screw, punch and screw driver bit

Country Status (1)

Country Link
TW (1) TWI300110B (en)

Also Published As

Publication number Publication date
TWI300110B (en) 2008-08-21

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