Published on Aug 20, 2018
This slide was presented at SIGGRAPH 2018.
https://s2018.siggraph.org/ <
1. Design Method of Digitally Fabricated Spring Glass Pen KengoTanaka* Kohei Ogawa* Tatsuya Minagawa Yoichi Ochiai *First joint authors
2. Agenda 1. Introduction 2. Related Work 3. Implementation (Spring Glass Pen) 4. Implementation (Spring Touch Pen) 5. Analysis 6. Discussion and Limitations 7. Contributions 1
3. Agenda 1. Introduction 2. Related Work 3. Implementation (Spring Glass Pen) 4. Implementation (Spring Touch Pen) 5. Analysis 6. Discussion and Limitations 7. Contributions 2
4. Introduction Various writing materials ● Pencil ● Marker pen ● Ballpoint pen ● Writing brush etc... 3
5. Introduction ● There are various factors that affect the feeling of writing ex.) Fountain pen The pen tip can be made of various kinds of metals, that differently affect the writing sensation (e.g., smoothness, thickness, etc) Reproduce soft writing comfort 4
6. Introduction ● Chinese Calligraphy ○ Writing sensation changes depending on hair material ■ weasel hair ■ Pig hair ■ Horse tail hair There is no practical implementation of a pen that writes similarly to a brush 5
7. Agenda 1. Introduction 2. Related Work 3. Implementation (Spring Glass Pen) 4. Implementation (Spring Touch Pen) 5. Analysis 6. Discussion and Limitations 7. Contributions 6
8. “EV-Pen” Wang et al. 2016“Haptic Pen” Lee et al. 2004 Related Work 7
9. “EV-Pen” Wang et al. 2016“Haptic Pen” Lee et al. 2004 Related Work 8
10. “EV-Pen” Wang et al. 2016“Haptic Pen” Lee et al. 2004 Related Work 9
11. Related Work However, these pens can not reproduce the feeling of softness. 10
12. Related Work “FlexStroke: a flexible, deformable brush-tip with dynamic stiffness for digital input” Xin et al. 2014 11
13. Agenda 1. Introduction 2. Related Work 3. Implementation (Spring Glass Pen) 4. Implementation (Spring Touch Pen) 5. Analysis 6. Discussion and Limitations 7. Contributions 12
14. Spring Glass Pen Spring Touch Pen We made a glass pen and a stylus which structure reproduces the feeling of softness when used for writing Implementation 13
15. Implementation(Spring Glass Pen) 14
16. Implementation(Spring Glass Pen) Pen axis Structure for sucking up ink by capillary action Prevent liquid from moving up to pen axis Ink stopper Thin groove 15
17. Implementation(Spring Glass Pen) Structure for sucking up ink by capillary action Thin groove 16
18. Implementation(Spring Glass Pen) Write with the brush laying down You can write a lot with just one attachment 17
19. Implementation(Spring Glass Pen) 18
20. Implementation(Spring Glass Pen) 19
21. We decided to make a pen that can reproduce various levels of softness. Implementation(Spring Glass Pen) 20
22. Implementation(Spring Glass Pen) When thinking about a structure that can change softness, we have come up with a spring. We thought that spring is a suitable structure because it can change softness with a simple structure. 21
23. Implementation(Spring Glass Pen) We used a 3D printer to make various springs of elasticity. 22
24. “Spring-Pen” Tanaka et al. 2017 Implementation(Spring Glass Pen) 23
25. Implementation(Spring Glass Pen) 24
26. Height Implementation(Spring Glass Pen) 25
27. Height Revolution Implementation(Spring Glass Pen) 26
28. Height section size Revolution Implementation(Spring Glass Pen) 27
29. Output spring Spring can be made using polyjet 3D printer. Implementation(Spring Glass Pen) 28
30. Implementation(Spring Glass Pen) ● 3DCAD Software ○ Fusion 360 29
31. Implementation(Spring Glass Pen) 30
32. Implementation(Spring Glass Pen) ● 3D Printer ○ Objet260 Connex3 ■ PolyJet 31
33. Implementation(Spring Glass Pen) 32
34. Implementation(Spring Glass Pen) A capillary phenomenon occurs in the groove of the pen tip, and it can actually be used for writing. We control writing comfort by controlling the parameters of spring (revolutions, height, section size) 33
35. Implementation(Spring Glass Pen) Joint type various springs in our booth Merit of joint type ● The material of the 3D printer is low cost, because it can be reworked for each part. ● By changing only the part of the spring, you can easily change the writing comfort 34
36. Agenda 1. Introduction 2. Related Work 3. Implementation (Spring Glass Pen) 4. Implementation (Spring Touch Pen) 5. Analysis 6. Discussion and Limitations 7. Contributions 35
37. Spring Touch Pen Implementation(Spring Touch Pen) 36
38. Implementation(Spring Touch Pen) Recently, smartphones and tablet terminals are widely used. And many users are using stylus pens to operate tablet screens. When drawing digital pictures and letters, a stylus pen is necessary. 37
39. However, with a normal stylus pen, the actual feeling of writing is hard. We think that expression will be enriched by reproducing the soft touch of the brush. Implementation(Spring Touch Pen) 38
40. Implementation(Spring Touch Pen) By adding softness to the stylus pen, it feels like a brush. 39
41. Implementation(Spring Touch Pen) Like a glass pen, by adapting the structure of the spring to the pen, it creates softness 40
42. Implementation(Spring Touch Pen) Fusion360 objet260 connex 41
43. Implementation(Spring Touch Pen) UBS-0010LAg We used a conductive powder (UBS-0010 LAg) to use the pen with a tablet. By applying this conductive powder around the pen, it was possible to perform touch recognition with a terminal device such as a smartphone or a pen tablet 42
44. Implementation(Spring Touch Pen) 43
45. Agenda 1. Introduction 2. Related Work 3. Implementation (Spring Glass Pen) 4. Implementation (Spring Touch Pen) 5. Analysis 6. Discussion and Limitations 7. Contributions 44
46. Analysis We analyzed the elasticity of the spring. Analysis software is Fusion 360. 45
47. Analysis Fixed 46
48. Analysis １N 47
49. Analysis 48
50. Analysis Max Displacement 0.3644 (mm) 49
51. Analysis It is the result of analyzing the displacement of the spring by changing the parameters of the coil. 50
52. Analysis 51
53. Analysis 52
54. Analysis R3H20S4 = Revolutions= 3 Height= 20mm, Section size= 4mm 53
55. Analysis R3H20S4 = Revolutions= 3 Height= 20mm, Section size= 4mm Max Displacement = 0.3644mm 54
56. Analysis R3H20S4 = Revolutions= 3 Height= 20mm, Section size= 4mm Max Displacement = 0.3644mm 55
57. Analysis R3H20S4 = Revolutions= 3 Height= 20mm, Section size= 4mm R5H27.5S3.5 = Revolutions= 5 Height= 27.5mm, Section size= 3.5mm Max Displacement = 0.3644mm 56
58. Analysis R3H20S4 = Revolutions= 3 Height= 20mm, Section size= 4mm R5H27.5S3.5 = Revolutions= 5 Height= 27.5mm, Section size= 3.5mm Max Displacement = 1.645mm Max Displacement = 0.3644mm 57
59. Analysis R3H20S4 = Revolutions= 3 Height= 20mm, Section size= 4mm R5H27.5S3.5 = Revolutions= 5 Height= 27.5mm, Section size= 3.5mm By changing the parameters of the coil, we can change elasticity. Max Displacement = 1.645mm Max Displacement = 0.3644mm 58
60. Agenda 1. Introduction 2. Related Work 3. Implementation (Spring Glass Pen) 4. Implementation (Spring Touch Pen) 5. Analysis 6. Discussion and Limitations 7. Contributions 59
61. 1. It is difficult to make a spring glass pen with FDM. 2. Our pen can not reproduce various softness with a single pen. 3. Currently, it can not be made automatically according to personal taste. You just choose from among the pens we made. Discussion and Limitations 60
62. 4. The part holding the pen is limited to the part above the spring. People who hold a pen tip may be hard to use. Discussion and Limitations 61
63. 4. The part holding the pen is limited to the part above the spring. People who hold a pen tip may be hard to use. Discussion and Limitations above 62
64. 4. The part holding the pen is limited to the part above the spring. People who hold a pen tip may be hard to use. Discussion and Limitations above pen tip 63
65. 5. Sometimes the pen is broken when you apply strong force. Discussion and Limitations Please do not apply strong force! 64
66. 1. Introduction 2. Related Work 3. Implementation (Spring Glass Pen) 4. Implementation (Spring Touch Pen) 5. Analysis 6. Discussion and Limitations 7. Contributions Agenda 65
67. 1. We proposed a method to make a practical pen by using 3D printer. 2. We propose a method that allows us to freely change pen softness by using the spring structure. Contributions 66
68. Please feel comfortable writing due to the difference in softness of spring, please visit and experience at our booth. S-259 Design Method of Digitally Fabricated Spring Glass Pen Kengo Tanaka Kohei Ogawa Tatsuya Minagawa Yoichi Ochiai 67
69. Thank you for listening! 68
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