JPH01116639U - - Google Patents
Info
- Publication number
- JPH01116639U JPH01116639U JP1199788U JP1199788U JPH01116639U JP H01116639 U JPH01116639 U JP H01116639U JP 1199788 U JP1199788 U JP 1199788U JP 1199788 U JP1199788 U JP 1199788U JP H01116639 U JPH01116639 U JP H01116639U
- Authority
- JP
- Japan
- Prior art keywords
- electromagnet
- permanent magnet
- armature
- magnetic
- spring
- 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
- 230000004907 flux Effects 0.000 claims 1
- 239000000696 magnetic material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Impact Printers (AREA)
Description
第１図乃至第４図は本考案の印字ヘツドの一実
施例を示すもので、第１図は断面図、第２図は一
部切欠して示した正面図、第３図は印字ヘツドの
ハウジング側の部分の分解斜視図、第４図はベー
ス側の部分の分解斜視図であり、また第５図ａ，
ｂは他の実施例を示す要部の斜視図であり、また
第６図、第７図は従来技術を示す略解断面図であ
る。
２０……ベース（コア）、３０……アマチユア
、３１……印字ワイヤ、３３……駆動バネ（板バ
ネ）、４１，４２……ヨーク、５０……永久磁石
、６０……電磁石、７０……バイパスヨーク。
Figures 1 to 4 show an embodiment of the print head of the present invention, in which Figure 1 is a sectional view, Figure 2 is a partially cutaway front view, and Figure 3 is a diagram of the print head. FIG. 4 is an exploded perspective view of the housing side part, FIG. 4 is an exploded perspective view of the base side part, and FIGS.
b is a perspective view of essential parts showing another embodiment, and FIGS. 6 and 7 are schematic exploded sectional views showing the prior art. 20... Base (core), 30... Armature, 31... Printing wire, 33... Drive spring (plate spring), 41, 42... Yoke, 50... Permanent magnet, 60... Electromagnet, 70... bypass yoke.
Claims (1)
持されたアマチユアと、前記アマチユアに対向し
て設けられた電磁石と、この電磁石が励磁されな
いとき、前記駆動バネのバネ力に抗して前記アマ
チユアを電磁石に吸着させる磁界を形成する永久
磁石と、前記電磁石と永久磁石とを保持し磁路を
形成するベースと、前記アマチユアと前記永久磁
石との間の磁路を形成するヨークと、前記電磁石
の励磁時にその磁束を通す磁性体からなるバイパ
スヨークとを具備し、前記永久磁石の磁力を打ち
消して前記アマチユアを解放するように前記電磁
石を励磁して前記駆動バネのバネ力で前記印字ワ
イヤを駆動する印字ヘツドにおいて、 前記バイパスヨークが、前記永久磁石の製造時
に永久磁石に一体化して形成されたことを特徴と
する印字ヘツド。[Claims for Utility Model Registration] An armature provided with a printing wire at one end and supported by a drive spring, an electromagnet provided opposite to the armature, and a spring of the drive spring when the electromagnet is not excited. A permanent magnet that forms a magnetic field that attracts the armature to the electromagnet against force, a base that holds the electromagnet and the permanent magnet and forms a magnetic path, and a magnetic path between the armature and the permanent magnet. and a bypass yoke made of a magnetic material that passes the magnetic flux when the electromagnet is excited, and excites the electromagnet so as to cancel the magnetic force of the permanent magnet and release the armature. A printing head that drives the printing wire with a spring force, wherein the bypass yoke is formed integrally with the permanent magnet during manufacture of the permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1199788U JPH01116639U (en) | 1988-01-30 | 1988-01-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1199788U JPH01116639U (en) | 1988-01-30 | 1988-01-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01116639U true JPH01116639U (en) | 1989-08-07 |
Family
ID=31221044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1199788U Pending JPH01116639U (en) | 1988-01-30 | 1988-01-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01116639U (en) |
-
1988
- 1988-01-30 JP JP1199788U patent/JPH01116639U/ja active Pending
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