Title:
DEVICE FOR MEASURING THE DISTANCE BETWEEN A HEAD AND A HEADREST, HEADREST POSITION-ADJUSTMENT DEVICE USING SAID DEVICE, METHOD FOR MEASURING THE DISTANCE BETWEEN A HEAD AND A HEADREST, AND HEADREST POSITION-ADJUSTMENT METHOD USING SAID METHOD
Document Type and Number:
WIPO Patent Application WO/2011/162075
Kind Code:
A1
Abstract:
The disclosed headrest position-adjustment device accurately measures the distance between a head and a headrest without being affected by external noise, prevents unnecessary movements of the headrest, and automatically adjusts the position thereof. Said headrest position-adjustment device (100) is provided with a distance-measurement device (10) and drive motor units (30A and 30B). The distance-measurement device (10) is provided with a plurality of detection electrodes (11 to 15) and a detection circuit (20). The detection circuit (20) is provided with a plurality of capacitance detection circuits (21 to 25) and a computation circuit (28). The computation circuit (28) uses capacitance values, position information from the detection electrodes (11 to 15), and a high-degree function with a degree of at least 3 to compute a high-degree curve in a two-dimensional coordinate system with capacitance on the y-axis and detection-electrode position on the x-axis. The computation circuit computes the highest-degree coefficient of the aforementioned high-degree curve and determines the distance (L) between a head (49) and a front part (43c) of a headrest on the basis of the computed highest-degree coefficient. On the basis of the measurement result, the headrest position-adjustment device (100) moves the front part (43c) of the headrest towards the front or back of a vehicle.
Inventors:
YAMAGUCHI, Yuichiro (1440 Mutsuzaki, Sakura-sh, Chiba 50, 〒2858550, JP)
山口 佑一郎 (〒50 千葉県佐倉市六崎１４４０番地 株式会社フジクラ佐倉事業所内 Chiba, 〒2858550, JP)
SAKURAI, Ryouhei (1-5-1 Kiba, Koto-k, Tokyo 12, 〒1358512, JP)
桜井 良平 (〒12 東京都江東区木場１－５－１ 株式会社フジクラ内 Tokyo, 〒1358512, JP)
山口 佑一郎 (〒50 千葉県佐倉市六崎１４４０番地 株式会社フジクラ佐倉事業所内 Chiba, 〒2858550, JP)
SAKURAI, Ryouhei (1-5-1 Kiba, Koto-k, Tokyo 12, 〒1358512, JP)
桜井 良平 (〒12 東京都江東区木場１－５－１ 株式会社フジクラ内 Tokyo, 〒1358512, JP)
Application Number:
JP2011/062474
Publication Date:
December 29, 2011
Filing Date:
May 31, 2011
Export Citation:
Assignee:
FUJIKURA LTD. (1-5-1, Kiba Koto-k, Tokyo 12, 〒1358512, JP)
株式会社フジクラ (〒12 東京都江東区木場１－５－１ Tokyo, 〒1358512, JP)
YAMAGUCHI, Yuichiro (1440 Mutsuzaki, Sakura-sh, Chiba 50, 〒2858550, JP)
山口 佑一郎 (〒50 千葉県佐倉市六崎１４４０番地 株式会社フジクラ佐倉事業所内 Chiba, 〒2858550, JP)
SAKURAI, Ryouhei (1-5-1 Kiba, Koto-k, Tokyo 12, 〒1358512, JP)
株式会社フジクラ (〒12 東京都江東区木場１－５－１ Tokyo, 〒1358512, JP)
YAMAGUCHI, Yuichiro (1440 Mutsuzaki, Sakura-sh, Chiba 50, 〒2858550, JP)
山口 佑一郎 (〒50 千葉県佐倉市六崎１４４０番地 株式会社フジクラ佐倉事業所内 Chiba, 〒2858550, JP)
SAKURAI, Ryouhei (1-5-1 Kiba, Koto-k, Tokyo 12, 〒1358512, JP)
International Classes:
B60N2/48; A47C7/38
Attorney, Agent or Firm:
ITAMI, Masaru et al. (Murata Bldg, Suite 4A 2-5, Kanda-Surugadai, Chiyoda-k, Tokyo 62, 〒1010062, JP)
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Claims: