JP2002046292A5 - - Google Patents
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- Publication number
- JP2002046292A5 JP2002046292A5 JP2000235404A JP2000235404A JP2002046292A5 JP 2002046292 A5 JP2002046292 A5 JP 2002046292A5 JP 2000235404 A JP2000235404 A JP 2000235404A JP 2000235404 A JP2000235404 A JP 2000235404A JP 2002046292 A5 JP2002046292 A5 JP 2002046292A5
- Authority
- JP
- Japan
- Prior art keywords
- back yoke
- variation
- curve
- hall element
- magnetic flux
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
- 230000004907 flux Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
Description
【0065】
一方、図7に示す特性曲線Aは、バックヨーク38を備えない場合の永久磁石32のN極に対向する位置(例えば、前記ホール素子の配置位置)における磁束分布の状態を示している。また破線で示した特性曲線Bは、バックヨークを備えた場合の永久磁石32のN極に対向する位置の磁束分布の状態を示している。すなわち、バックヨーク38を備えた場合においては、曲線Bに示すように磁束分布が急峻化される。[0065]
On the other hand, the characteristic curve A shown in FIG. 7 shows the state of the magnetic flux distribution at a position facing the N pole of the permanent magnet 32 (for example, the arrangement position of the Hall element) when the back yoke 38 is not provided. The characteristic curve B shown by a broken line shows a state of magnetic flux distribution of a position facing the N pole of the permanent magnet 32 when equipped with a back yoke. That is, when the back yoke 38 is provided, the magnetic flux distribution is sharpened as shown by the curve B.
【0066】
ここで、前記ホール素子のばらつきによる磁電変換感度が、図7に示すL1およびL2の範囲にあると仮定すれば、バックヨーク38を備えた場合には、ホール素子のばらつきに基づく検出幅のばらつきは、bに示すようになされる。また、バックヨークを備えない永久磁石単体の場合には、ホール素子のばらつきに基づく検出感度の幅は、aに示すようになされる。この特性から理解されるように、バックヨークを備えた場合においては、ホール素子のばらつきによる検出幅のばらつきを実質的に小さくすることができる。換言すれば、サブタンクにおけるインク量の検出精度を向上させることに寄与できる。[0066]
Here, assuming that the magnetoelectric conversion sensitivity due to the variation of the Hall element is in the range of L1 and L2 shown in FIG. 7, when the back yoke 38 is provided, the variation of the detection width based on the variation of the Hall element Is done as shown in b . In the case of permanent magnets alone without a back yoke width of the detection sensitivity based on the variation of the Hall element is made as shown in a. As understood from this characteristic, when the back yoke is provided, the variation of the detection width due to the variation of the Hall element can be substantially reduced. In other words, this can contribute to improving the detection accuracy of the ink amount in the sub tank.
【0067】
また、図7に示す曲線Aと曲線Bの比較において、磁石中央部での磁束密度は曲線Bの方が大きく、すなわちバックヨーク38を備えることで、表面の磁束密度を大きくすることが可能となる。これによりバックヨークを備えない場合に比べて永久磁石32の磁力を小さく設定することが可能となり、永久磁石32の側面方向にリークする磁力線量も少なくなるため、ますます効果的に磁気干渉を抑制することができる。[0067]
Further, in comparison between the curve A and the curve B shown in FIG. 7, the magnetic flux density at the center of the magnet is larger in the curve B , that is, by providing the back yoke 38, the magnetic flux density on the surface can be increased. Become. This makes it possible to set the magnetic force of the permanent magnet 32 smaller than when the back yoke is not provided, and the magnetic dose that leaks in the side direction of the permanent magnet 32 also decreases, thereby more effectively suppressing the magnetic interference. can do.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000235404A JP2002046292A (en) | 2000-08-03 | 2000-08-03 | Ink-jet recording apparatus |
US09/705,922 US6378971B1 (en) | 1999-11-05 | 2000-11-06 | Ink-jet recording apparatus |
AT00123461T ATE269788T1 (en) | 1999-11-05 | 2000-11-06 | INKJET RECORDING APPARATUS |
EP20000123461 EP1097814B1 (en) | 1999-11-05 | 2000-11-06 | Ink-jet recording apparatus |
DE60011733T DE60011733T2 (en) | 1999-11-05 | 2000-11-06 | Ink jet recording apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000235404A JP2002046292A (en) | 2000-08-03 | 2000-08-03 | Ink-jet recording apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2002046292A JP2002046292A (en) | 2002-02-12 |
JP2002046292A5 true JP2002046292A5 (en) | 2004-10-14 |
Family
ID=18727618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000235404A Withdrawn JP2002046292A (en) | 1999-11-05 | 2000-08-03 | Ink-jet recording apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2002046292A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5056335B2 (en) * | 2007-10-15 | 2012-10-24 | ブラザー工業株式会社 | Ink container |
-
2000
- 2000-08-03 JP JP2000235404A patent/JP2002046292A/en not_active Withdrawn
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