JPH0349563U - - Google Patents
Info
- Publication number
- JPH0349563U JPH0349563U JP11073789U JP11073789U JPH0349563U JP H0349563 U JPH0349563 U JP H0349563U JP 11073789 U JP11073789 U JP 11073789U JP 11073789 U JP11073789 U JP 11073789U JP H0349563 U JPH0349563 U JP H0349563U
- Authority
- JP
- Japan
- Prior art keywords
- toner concentration
- detection device
- concentration detection
- wall
- toner
- 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.)
- Pending
Links
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 3
- 239000000203 mixture Substances 0.000 claims 1
- 230000035699 permeability Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Description
第１図は本考案による一実施例を示す要部断面
図、第２図は現像器の概略構造を示す図、第３図
は従来のトナー濃度センサの取り付け構造を示す
図、第４図は第３図のトナー濃度センサの内部構
造を示す図である。
図において、１……トナー濃度センサ、２……
現像器、２ａ……現像器壁面、３……接着剤、２
１……センサ取付け用の開口部、２２……〓間を
それぞれ示す。
FIG. 1 is a cross-sectional view of a main part showing an embodiment of the present invention, FIG. 2 is a diagram showing a schematic structure of a developing device, FIG. 3 is a diagram showing a conventional toner density sensor mounting structure, and FIG. 4 is a diagram showing the internal structure of the toner concentration sensor of FIG. 3. FIG. In the figure, 1...toner concentration sensor, 2...
Developing device, 2a...Developing device wall surface, 3...Adhesive, 2
1... Opening for sensor installation, 22... 〓 are shown respectively.
Claims (1)
る現像剤１１を収容した現像器壁面の開口部２１
に、現像剤の透磁率変化をインダクタンス変化と
して検出するコイルを具備したトナー濃度センサ
１を取付けてなるトナー濃度検出装置であつて、 前記トナー濃度センサはその取付け面と壁面開
口部との〓間に絶縁性で且つ非磁性の接着剤を充
填することにより現像器壁面に固定されてなるこ
とを特徴とするトナー濃度検出装置。[Claims for Utility Model Registration] An opening 21 in the wall of a developing device containing a developer 11 made of a mixture of a magnetic carrier and an insulating toner.
A toner concentration detection device is provided with a toner concentration sensor 1 equipped with a coil for detecting a change in magnetic permeability of the developer as a change in inductance, the toner concentration sensor being installed between the mounting surface and a wall opening. 1. A toner concentration detection device, characterized in that the toner concentration detection device is fixed to a wall surface of a developing device by filling an insulating and non-magnetic adhesive therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11073789U JPH0349563U (en) | 1989-09-20 | 1989-09-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11073789U JPH0349563U (en) | 1989-09-20 | 1989-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0349563U true JPH0349563U (en) | 1991-05-15 |
Family
ID=31659256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11073789U Pending JPH0349563U (en) | 1989-09-20 | 1989-09-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0349563U (en) |
-
1989
- 1989-09-20 JP JP11073789U patent/JPH0349563U/ja active Pending
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