Difference between revisions of "Double-Knock mechanism"

From Stationery Wiki
Jump to navigation Jump to search
 
(15 intermediate revisions by 5 users not shown)
Line 1: Line 1:
 
[[File:Double-Knock pencils.JPG|thumb|right|Some double-knock pencils. Left to right: three Niji Grip 350DX (the black one is a vintage model), two Niji Grip 0.9mm, a Pilot Delful The Shaker, and a Serve Swell]]
 
[[File:Double-Knock pencils.JPG|thumb|right|Some double-knock pencils. Left to right: three Niji Grip 350DX (the black one is a vintage model), two Niji Grip 0.9mm, a Pilot Delful The Shaker, and a Serve Swell]]
−
'''Double-knock''' or '''vanishing point''' (also '''dual action'''), is a particular type of mechanism that allow the tip of a mechanical pencil to fully retract inside the body of the pencil.
+
'''Double-knock''' or '''vanishing point''' (also '''dual action'''), is a particular type of mechanism that allow the tip of a [[mechanical pencil]] to fully retract inside the body of the pencil.
 
In a double-knock pencil, a deep click of the push button extends the whole tip section, while further short clicks allow the lead to come out (like a regular mechanical pencil).
 
In a double-knock pencil, a deep click of the push button extends the whole tip section, while further short clicks allow the lead to come out (like a regular mechanical pencil).
 
In order to retract back the tip (when it's in the extended position), usually another deep push of the button is needed.
 
In order to retract back the tip (when it's in the extended position), usually another deep push of the button is needed.
Line 9: Line 9:
 
! Brand !! Model name !! Additional Features
 
! Brand !! Model name !! Additional Features
 
|-
 
|-
−
| Pilot || Vanishing Point || Lead hardness indicator
+
| Alvin ||Draft-Tec Retrac || 4mm drafting tip
 +
|-
 +
| Aristo || DK2 || Twist-extendable eraser
 +
|-
 +
| Baile || Double Nib 538 ||
 +
|-
 +
| Colleen ||Jib WK-816 ||
 +
|-
 +
| Colleen ||Jib WK-1051||
 +
|-
 +
| Cult Pens || Cult Pencil || Side button to retract the tip; metal body
 +
|-
 +
| Fuji Corona ||No. 205-03 Mecha-Pen || 4mm drafting tip
 +
|-
 +
| Linex || DP 1000|| Side button to retract the tip
 +
|-
 +
| Linex || DP 2000|| Twist-extendable eraser; 4mm drafting tip
 +
|-
 +
| Manufactum || Druckbleisift Messing|| Side button to retract the tip
 +
|-
 +
| Niji || Grip 350DX || Twist-extendable eraser
 +
|-
 +
| Ohto || Horizon || Auto advance mechanism; side button to retract the tip; metal body
 +
|-
 +
| Ohto || OP-500<ref>https://unsharpen.com/what-is-a-double-knock-pencil/</ref> || Spring loaded clip to retract the tip
 +
|-
 +
| Olympia || Double Knock ||
 +
|-
 +
| Pacific Arc || RDP-405 ||
 +
|-
 +
| Pacific Arc || RDP-605 || Twist-extendable eraser
 
|-
 
|-
−
| Pilot || Automac || Auto advance mechanism; metal body
+
| Paper Mate || Apex || Twist-extendable eraser
 
|-
 
|-
−
| Pilot || Delful The Shaker || Shaker mechanism with lead lock when the tip is retracted
+
| Penac || Double Knock ||
 
|-
 
|-
 
| Pentel || Graph Gear 1000 || Spring loaded clip to retract the tip; metal body; lead hardness indicator
 
| Pentel || Graph Gear 1000 || Spring loaded clip to retract the tip; metal body; lead hardness indicator
Line 21: Line 51:
 
| Pentel || Flex Fit || Spring loaded clip to retract the tip; ergonomic rubber grip (also customisable in the Flex Fit II)
 
| Pentel || Flex Fit || Spring loaded clip to retract the tip; ergonomic rubber grip (also customisable in the Flex Fit II)
 
|-
 
|-
−
| Rotring || Rapid || Twist-extendable eraser
+
| Pentel || TranXition || Spring loaded clip to retract the tip
 +
|-
 +
| Pensan || IQ - My-IQ - IQ Duo || Twist-extendable eraser. Ergonomic double injection grip section made by Kotobuki Co. Ltd Japan.
 +
|-
 +
| Pilot || Vanishing Point || Lead hardness indicator
 +
|-
 +
| Pilot || Automac || Auto advance mechanism; metal body
 +
|-
 +
| Pilot || Delful The Shaker || [[Shaker mechanism]] with lead lock when the tip is retracted
 
|-
 
|-
−
| Niji || Grip 350DX || Twist-extendable eraser
+
| Platinum || W-Knock MH-120 ||
 +
|-
 +
| Pyramid || SP-60 Double Knock ||
 +
|-
 +
| [[Rotring]] || Esprit double push R5033312 || Side button to retract the tip
 
|-
 
|-
−
| Ohto || Horizon || Auto advance mechanism; side button to retract the tip; metal body
+
| [[Rotring]] || Initial R504340 ||
 
|-
 
|-
−
| Papermate || Apex || Twist-extendable eraser
+
| [[Rotring]] || Rapid || Twist-extendable eraser
 
|-
 
|-
 
| Serve || Swell || Twist-extendable eraser
 
| Serve || Swell || Twist-extendable eraser
 +
|-
 +
| Senator || Avantic ||
 +
|-
 +
| Spaper || Technic Retro ||
 +
|-
 +
| Stabilo || Microtom 3365 ||
 +
|-
 +
| Staedtler || Retro 778 ||
 +
|-
 +
| Staedtler || Retro de Luxe 778 25 || Premium chromed steel body
 +
|-
 +
| Sun-Star || W Knock Sharp ||
 +
|-
 +
| Tomato || Hidden Nib HN-50 ||
 +
|-
 +
| Tombow || Protect SH-WPS ||
 +
|-
 +
| You & Me || DBL-KNOCK ||
 
|}
 
|}
  
−
[[Category:Pencils]]
+
[[Category:Pencil]]
−
[[Category:Mechanical Pencils]]
+
[[Category:Mechanical Pencil]]

Latest revision as of 09:54, 12 June 2023

Some double-knock pencils. Left to right: three Niji Grip 350DX (the black one is a vintage model), two Niji Grip 0.9mm, a Pilot Delful The Shaker, and a Serve Swell

Double-knock or vanishing point (also dual action), is a particular type of mechanism that allow the tip of a mechanical pencil to fully retract inside the body of the pencil. In a double-knock pencil, a deep click of the push button extends the whole tip section, while further short clicks allow the lead to come out (like a regular mechanical pencil). In order to retract back the tip (when it's in the extended position), usually another deep push of the button is needed.

Double-knock pencil models[edit]

Brand Model name Additional Features
Alvin Draft-Tec Retrac 4mm drafting tip
Aristo DK2 Twist-extendable eraser
Baile Double Nib 538
Colleen Jib WK-816
Colleen Jib WK-1051
Cult Pens Cult Pencil Side button to retract the tip; metal body
Fuji Corona No. 205-03 Mecha-Pen 4mm drafting tip
Linex DP 1000 Side button to retract the tip
Linex DP 2000 Twist-extendable eraser; 4mm drafting tip
Manufactum Druckbleisift Messing Side button to retract the tip
Niji Grip 350DX Twist-extendable eraser
Ohto Horizon Auto advance mechanism; side button to retract the tip; metal body
Ohto OP-500[1] Spring loaded clip to retract the tip
Olympia Double Knock
Pacific Arc RDP-405
Pacific Arc RDP-605 Twist-extendable eraser
Paper Mate Apex Twist-extendable eraser
Penac Double Knock
Pentel Graph Gear 1000 Spring loaded clip to retract the tip; metal body; lead hardness indicator
Pentel Technica-X
Pentel Flex Fit Spring loaded clip to retract the tip; ergonomic rubber grip (also customisable in the Flex Fit II)
Pentel TranXition Spring loaded clip to retract the tip
Pensan IQ - My-IQ - IQ Duo Twist-extendable eraser. Ergonomic double injection grip section made by Kotobuki Co. Ltd Japan.
Pilot Vanishing Point Lead hardness indicator
Pilot Automac Auto advance mechanism; metal body
Pilot Delful The Shaker Shaker mechanism with lead lock when the tip is retracted
Platinum W-Knock MH-120
Pyramid SP-60 Double Knock
Rotring Esprit double push R5033312 Side button to retract the tip
Rotring Initial R504340
Rotring Rapid Twist-extendable eraser
Serve Swell Twist-extendable eraser
Senator Avantic
Spaper Technic Retro
Stabilo Microtom 3365
Staedtler Retro 778
Staedtler Retro de Luxe 778 25 Premium chromed steel body
Sun-Star W Knock Sharp
Tomato Hidden Nib HN-50
Tombow Protect SH-WPS
You & Me DBL-KNOCK
  1. ↑ https://unsharpen.com/what-is-a-double-knock-pencil/
Retrieved from ‘https://stationery.wiki/index.php?title=Double-Knock_mechanism&oldid=10727’