JPH027268B2 - - Google Patents
Info
- Publication number
- JPH027268B2 JPH027268B2 JP55048862A JP4886280A JPH027268B2 JP H027268 B2 JPH027268 B2 JP H027268B2 JP 55048862 A JP55048862 A JP 55048862A JP 4886280 A JP4886280 A JP 4886280A JP H027268 B2 JPH027268 B2 JP H027268B2
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- yoke
- magnetic flux
- permanent magnets
- magnetic
- 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.)
- Expired - Lifetime
Links
- 230000004907 flux Effects 0.000 claims description 23
- 239000000696 magnetic material Substances 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims 2
- 238000006073 displacement reaction Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Impact Printers (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Description
【発明の詳細な説明】
本発明は、可動コイルの駆動磁束形成装置に関
するものであつて、一例としては、可動コイル型
インパクト式プリントヘツド等に応用可能なもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a driving magnetic flux forming device for a moving coil, and is applicable to, for example, a moving coil type impact type print head.
従来において、特開昭51−41859号公報、実開
昭53−50459号公報または実開昭54−73917号公報
に開示されているような構造の可動コイル用駆動
磁束形成が知られており、偏平状の可動コイルに
磁束を及ぼす永久磁石は、前後２列に一直線状に
配列してあるものであつた。 Hitherto, it has been known to form a drive magnetic flux for a moving coil having a structure as disclosed in Japanese Patent Application Laid-Open No. 51-41859, Japanese Utility Model Application Publication No. 53-50459, or Japanese Utility Model Application Publication No. 54-73917. The permanent magnets that exert magnetic flux on the flat moving coil were arranged in two straight lines, front and rear.
この公知構造によれば、永久磁石の磁束は完全
には閉ループを形成していないために、漏洩磁束
が大きい。したがつて、磁気効率が低下し、装置
の全体形状が大きくなる欠点があつた。これに加
えて、磁路空〓における磁束の強さが可動コイル
の位置によつて、つまり外側の可動コイルと中央
の可動コイルによつて異なるために、可動コイル
に生じる変位力に差を生じる問題を有している。
変位力の差は、印字品質上の重大な問題であるた
めに、公知構造では、現実には各駆動コイルに作
用する磁束を一定にする調整作用が必要となるな
ど、組立作業性が大変煩雑になつていた。 According to this known structure, since the magnetic flux of the permanent magnet does not form a completely closed loop, leakage magnetic flux is large. Therefore, there were disadvantages in that the magnetic efficiency decreased and the overall shape of the device increased. In addition, the strength of the magnetic flux in the magnetic path differs depending on the position of the moving coil, that is, between the outer moving coil and the center moving coil, which causes a difference in the displacement force generated in the moving coil. I have a problem.
Differences in displacement force are a serious problem in print quality, so in the known structure, in reality, an adjustment action is required to keep the magnetic flux acting on each drive coil constant, making assembly work very complicated. I was getting used to it.
そこで本発明は、上記従来の欠点を解消するこ
とを目的とするものである。 Therefore, the present invention aims to eliminate the above-mentioned conventional drawbacks.
以下、本発明の詳細を添付図面に示した一実施
例にそつて説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to an embodiment shown in the accompanying drawings.
第１図および第２図において、複数（図面では
一部省略されているが、実際には18本ある。）の
印字レバー１が放射状に同一中心角度をもつて配
列している。印字レバー１は、この実施例では、
例えばステンレスやリン青銅などの軽量非磁性の
薄板バネ材にて形成したものであつて、各印字レ
バー１は２本のバネ部２を介してリング状部３と
一体に形成されている。リング状部３は、リング
状止め板４および止めネジ５を介してホルダ６の
外周部に取り付けられているものである。 In FIGS. 1 and 2, a plurality of printing levers 1 (partially omitted in the drawings, but actually there are 18) are arranged radially with the same central angle. In this embodiment, the print lever 1 is
For example, it is made of a lightweight non-magnetic thin plate spring material such as stainless steel or phosphor bronze, and each printing lever 1 is formed integrally with a ring-shaped part 3 via two spring parts 2. The ring-shaped portion 3 is attached to the outer peripheral portion of the holder 6 via a ring-shaped retaining plate 4 and a set screw 5.
各印字レバー１は、ほぼ３角形状に形成され、
その両側部には剛性を高めるための立曲げ部７が
ほぼ垂直に屈成してあり、各先端部にはそれぞれ
ホルダピン８を介して印字要素の一例としてのワ
イヤ９が取り付けられている。ワイヤ９の先端部
は、図示しないガイド部材を介して、第４図Ａに
示すような縦一列の、または第４図Ｂに示すよう
な千鳥状の配列形態をもつて摺動自在に支持さ
れ、各ワイヤ先端は図示しないプラテンと対向す
るようになつている。 Each printing lever 1 is formed into a substantially triangular shape,
Vertical bent portions 7 are formed almost vertically on both sides to increase rigidity, and a wire 9 as an example of a printing element is attached to each tip via a holder pin 8. The distal ends of the wires 9 are slidably supported in a vertical line as shown in FIG. 4A or in a staggered arrangement as shown in FIG. 4B via a guide member (not shown). , the tip of each wire faces a platen (not shown).
また、各印字レバー１のほぼ中央部には、第２
図および第３図に示す如く、絶縁性のホルダ１０
および接着剤を介して焼結空芯型の可動コイル１
１が固着されている。この可動コイル１１は、そ
の変位方向（第２図左方）と平行な平面にそつて
閉ループ状に偏平に巻回形成されており、しかも
この平面上で上記変位方向と直交する方向に直線
状部分１１ａ，１１ｂとを有するように形成され
ている。したがつて直線状部分１１ａ，１１ｂは
互いに平行であつて、この可動コイル１１に駆動
電流を印加すると、両直線状部分１１ａと１１ｂ
とではこの駆動電流は互いに逆向きに流れること
になる。両直線状部分１１ａ，１１ｂは、以下で
説明される磁路空〓中に挿通位置せしめられる。 In addition, approximately in the center of each printing lever 1, there is a second
As shown in the figure and FIG. 3, an insulating holder 10
And sintered air core type moving coil 1 through adhesive
1 is fixed. The moving coil 11 is wound flat in a closed loop along a plane parallel to the displacement direction (left side in FIG. 2), and linearly wound in a direction perpendicular to the displacement direction on this plane. It is formed to have portions 11a and 11b. Therefore, the linear portions 11a and 11b are parallel to each other, and when a driving current is applied to the moving coil 11, both the linear portions 11a and 11b
In this case, the drive currents flow in opposite directions. Both linear portions 11a, 11b are positioned through a magnetic path which will be explained below.
つぎに、本発明の特徴をなす磁路形成構造につ
いて、第１図、第２図および第５図を参照して説
明する。 Next, the magnetic path forming structure, which is a feature of the present invention, will be explained with reference to FIGS. 1, 2, and 5.
第１図において、第１永久磁石１２は、印字レ
バー１および可動コイル１１の各個数と同数であ
る18個が、同一平面（第５図では上方に位置して
いる。）上で同一中心角度をもつて放射状に配列
してある。各第１永久磁石１２の両側面には、磁
性材の第１ヨーク１３，１４が固着してある。 In FIG. 1, 18 first permanent magnets 12, the same number as the printing lever 1 and the movable coil 11, are arranged on the same plane (located above in FIG. 5) at the same central angle. They are arranged radially with . First yokes 13 and 14 made of magnetic material are fixed to both side surfaces of each first permanent magnet 12.
第５図に示すように、隣接するヨーク１３，１
４の間で、間隔ｄなる第１磁路空〓１５が形成さ
れている。各第１永久磁石１２は、例えばその一
側のヨーク１３がＮ極に、他側のヨーク１４がＳ
極になるようにその円周配列向にそつて着磁され
ており、各第１永久磁石１２の磁束はヨーク１
３，１４を介して各第１磁路空〓１５に集中誘導
される。したがつて各第１磁路空〓１５中では、
磁束は、第５図においては矢印方向（左方）に、
第１図においては反時計方向に流れている。 As shown in FIG.
4, a first magnetic path space 15 with a spacing d is formed. For example, each first permanent magnet 12 has a yoke 13 on one side as a north pole and a yoke 14 on the other side as an south pole.
The magnetic flux of each first permanent magnet 12 is magnetized along the circumferential arrangement direction so as to form a pole, and the magnetic flux of each first permanent magnet 12 is
3 and 14, and are concentratedly guided to each first magnetic path air 15. Therefore, in each first magnetic path space 15,
In Fig. 5, the magnetic flux is in the direction of the arrow (to the left),
In FIG. 1, the flow is counterclockwise.
これに対して、第２永久磁石１６は、第１永久
磁石１２の下方（第１図では第１永久磁石１２の
後方にあり、それに隠れて見えない。）で、第１
永久磁石１２と同一配列形態でかつ間隔Ｄを隔て
て平行に配列されている。第２永久磁石１６も、
第１永久磁石１２と同様に、その両側面に磁性材
の第２ヨーク１７，１８を備えており、隣接する
ヨーク１７，１８の間で間隔ｄなる第２磁路空〓
１９が形成されている。第２永久磁石１６は、そ
の一側のヨーク１７がＳ極に、他側のヨーク１８
がＮ極になるように、その円周配列方向にそつて
かつ第１永久磁石１２とは逆方向に着磁されてい
る。第２永久磁石１６の磁束は、ヨーク１７，１
８を介して第２磁路空〓１９に集中誘導され、第
２磁路空〓１９中では、磁束は、第５図において
は矢印方向（右方）に、第１図においては時計回
り方向に流れている。 On the other hand, the second permanent magnet 16 is located below the first permanent magnet 12 (in FIG. 1, it is behind the first permanent magnet 12 and cannot be seen because it is hidden behind it).
They are arranged in the same arrangement form as the permanent magnets 12 and in parallel with an interval D between them. The second permanent magnet 16 also
Similar to the first permanent magnet 12, second yokes 17 and 18 made of magnetic material are provided on both sides of the first permanent magnet 12, and a second magnetic path is formed with a distance d between adjacent yokes 17 and 18.
19 is formed. The second permanent magnet 16 has a yoke 17 on one side as an S pole and a yoke 18 on the other side.
The magnets are magnetized along the circumferential arrangement direction and in the opposite direction to the first permanent magnet 12 so that the magnet becomes the north pole. The magnetic flux of the second permanent magnet 16 is
In the second magnetic path air 19, the magnetic flux is directed in the direction of the arrow (to the right) in FIG. 5, and in the clockwise direction in FIG. It is flowing to.
上記のような第１磁路空〓１５と第２磁路空〓
１９に対して、可動コイル１１が第５図に示す如
く挿通配置され、その直線状部分１１ａ（第２図
参照）が第１磁路空〓１５内、他方の直線状部分
１１ｂが第２磁路空〓１９内に位置している。 The first magnetic path air 15 and the second magnetic path air as above
19, the moving coil 11 is inserted and arranged as shown in FIG. It is located within 19 roads.
この可動コイル１１に、直線状部分１１ａでは
第５図の紙面垂直下方に、また直線状部分１１ｂ
では同図の紙面垂直上方に流れるように、駆動パ
ルス電流を印加すれば、可動コイル１１はその両
直線状部分１１ａ，１１ｂが共にフレミングの左
手の法則に従つて第５図上方（第２図では左方）
への変位力を受けることになる。 In this moving coil 11, the linear portion 11a is vertically downward from the paper surface of FIG. 5, and the linear portion 11b is
Now, if a driving pulse current is applied so that it flows vertically upward in the plane of the drawing, the moving coil 11 will move upward in Fig. 5 (Fig. Now on the left)
will be subjected to a displacement force.
第１永久磁石１２と第２永久磁石１６との間の
間隔Ｄは、両者間に挿入されている非磁性のスペ
ーサ２０によつて定められている。この間隔Ｄ
は、第１永久磁石１２と第２永久磁石１６間の磁
気干渉または両者間での磁束の漏洩を極力小さく
するために、できるだけ大きく設定することが望
ましい。スペース上の観点を加味すれば、比率
Ｄ／ｄが約２倍以上あれば実用上差し支えない。 The distance D between the first permanent magnet 12 and the second permanent magnet 16 is determined by a non-magnetic spacer 20 inserted between them. This interval D
is desirably set as large as possible in order to minimize magnetic interference between the first permanent magnet 12 and second permanent magnet 16 or leakage of magnetic flux between them. Considering the space considerations, it is practically acceptable if the ratio D/d is approximately twice or more.
なお、第１永久磁石１２と第２永久磁石１６
は、この実施例では、小形でも強力な磁束密度が
得られるサマリウムコバルト等の希土類永久磁石
が使用されている。 Note that the first permanent magnet 12 and the second permanent magnet 16
In this embodiment, a rare earth permanent magnet such as samarium cobalt is used, which can provide a strong magnetic flux density even though it is small.
ホルダ６は、アルミニウムまたはその合金など
の軽量非磁性材料にて形成したものであつて、サ
ンドイツチ状に積層配置される第１永久磁石１２
とスペーサ２０と第２永久磁石１６とを保持する
保持溝２１が形成されている。各保持溝２１の両
側には、可動コイル１１およびヨーク１３，１
４，１７，１８を収容可能な空間２２が形成され
ている。 The holder 6 is made of a lightweight non-magnetic material such as aluminum or an alloy thereof, and includes first permanent magnets 12 stacked in a sandwich pattern.
A holding groove 21 for holding the spacer 20 and the second permanent magnet 16 is formed. On both sides of each holding groove 21, a movable coil 11 and a yoke 13, 1
A space 22 capable of accommodating 4, 17, and 18 is formed.
ホルダ６の中央部には、ゴムなどで形成した緩
衝材２３が設けてあり、この緩衝材２３の前面に
各印字レバー１の先端部が設定された予圧をもつ
て接触し、これによつて各印字レバー１のレスト
ポジシヨンが決定されている。 A cushioning material 23 made of rubber or the like is provided at the center of the holder 6, and the tip of each printing lever 1 contacts the front surface of this cushioning material 23 with a preset preload. The rest position of each print lever 1 has been determined.
上記の如く構成されたプリントヘツドは、図示
しないキヤリツジ上に搭載されて、このキヤリツ
ジと共に記録紙の送り方向と直交する方向に一定
の速度で移動され、この移動中に可動コイル１１
に選択的に駆動パルス電流が印加される。駆動パ
ルス電流が印加された可動コイル１１は、上記し
たように、フレミング力を受けて瞬時的に第２図
左方へ変位する。この変位によつてそれに対応す
る印字レバー１がバネ２のバネ力に抗して左方へ
変位し、ワイヤ９が前進してその先端でインクリ
ボン（図示せず。）を記録紙に押圧し、この記録
紙上にドツトが形成される。ドツト形成後、ワイ
ヤ９と印字レバー１は、バネ部２のバネ力によつ
て初期のレストポジシヨンに復帰する。このとき
印字レバー１の先端部は緩衝材２３に衝突し、そ
の復帰エネルギが緩衝材２３の働きによつて吸収
され、印字レバー１のリバウンドは速やかに鎮静
化される。 The print head configured as described above is mounted on a carriage (not shown) and is moved together with this carriage at a constant speed in a direction perpendicular to the feeding direction of the recording paper.During this movement, the movable coil 11
A driving pulse current is selectively applied to. The movable coil 11 to which the drive pulse current is applied is instantaneously displaced to the left in FIG. 2 in response to the Fleming force, as described above. Due to this displacement, the corresponding print lever 1 is displaced to the left against the spring force of the spring 2, and the wire 9 moves forward and presses the ink ribbon (not shown) against the recording paper with its tip. , dots are formed on this recording paper. After the dot is formed, the wire 9 and the printing lever 1 are returned to the initial rest position by the spring force of the spring portion 2. At this time, the tip of the print lever 1 collides with the buffer material 23, and the return energy is absorbed by the action of the buffer material 23, so that the rebound of the print lever 1 is quickly suppressed.
以上のように構成した本発明に係る駆動磁束形
成装置によれば、磁路が二つの平面上で磁束の向
が互いに逆方向の円周状の閉ループに形成される
ので、磁束の漏洩が少なく、磁気効率がよくな
る。なおかつ各磁路空〓中では、高密度のばらつ
きのない磁束が得られるから、可動コイル等の駆
動に際しては小電流によつて鋭敏かつ強力に動作
せしめることができるとともに、均一な変位力が
得られ、印字品質が向上する。 According to the driving magnetic flux forming device according to the present invention configured as described above, the magnetic path is formed in a circumferential closed loop on two planes with magnetic flux directions opposite to each other, so that leakage of magnetic flux is reduced. , magnetic efficiency improves. Furthermore, since a high-density and uniform magnetic flux is obtained in each magnetic path, when driving a moving coil, etc., it is possible to operate it sharply and powerfully with a small current, and at the same time, a uniform displacement force can be obtained. This improves print quality.
図面は本発明を可動コイル型インバクト式プリ
ントヘツドに応用した一実施例を示すものであつ
て、第１図はその一部を切除または断面して示す
正面図、第２図は第１図−線断面図、第３図
は印字レバーと可動コイルの取付状態を示す拡大
断面図、第４図ＡよびＢはワイヤの先端配列を示
す正面図、第５図は第１図−線拡大断面図で
ある。
１１……可動コイル、１１ａ，１１ｂ……可動
コイルの直線状部分、１２……第１永久磁石、１
３，１４……第１ヨーク、１５……第１磁路空
〓、１６……第２永久磁石、１７，１８……第２
ヨーク、１９……第２永久磁石。
The drawings show an embodiment in which the present invention is applied to a moving coil impact type print head, in which FIG. 1 is a partially cutaway or cross-sectional front view, and FIG. 3 is an enlarged sectional view showing the mounting state of the print lever and moving coil; FIGS. 4A and B are front views showing the wire tip arrangement; and FIG. 5 is an enlarged sectional view taken from FIG. 1. It is. 11... Moving coil, 11a, 11b... Straight portion of moving coil, 12... First permanent magnet, 1
3, 14...first yoke, 15...first magnetic path empty, 16...second permanent magnet, 17,18...second
Yoke, 19...Second permanent magnet.
Claims (1)
放射状に閉ループをなすように配列してある複数
の第１永久磁石と、 上記第１永久磁石の両側面に設けてあり、当該
永久磁石の磁束を集中誘導する磁性材の第１ヨー
クと、 上記第１ヨークの隣り同志の間で可動コイルが
位置可能に形成してあり、上記第１永久磁石の磁
束が上記第１ヨークを介して集中誘導されている
第１磁路空〓と、 上記第１平面と一定間隔を隔てた平行な第２平
面上で、上記第１永久磁石と同一配列形態で対向
的に配列してある、上記第１永久磁石と同数の第
２永久磁石と、 上記第２永久磁石の両側面に設けてあり、当該
永久磁石からの磁束を集中誘導する磁性材の第２
ヨークと、 上記第２ヨークの隣り同志の間で、上記第１磁
路空〓と対応して上記可動コイルが位置可能に形
成してあり、第２永久磁石からの磁束が上記第２
ヨークを介して集中誘導されている第２磁路空〓
と、 上記第１永久磁石と上記第２永久磁石とは、そ
の円周配列方向にそつて互いに逆方向に着磁して
あること、 とによつて構成される可動コイルの駆動磁束形成
装置。[Scope of Claims] 1. A plurality of first permanent magnets arranged radially in a closed loop with substantially the same center angle on a first plane; and a plurality of first permanent magnets arranged on both sides of the first permanent magnets. A first yoke made of a magnetic material that concentrates and guides the magnetic flux of the permanent magnet, and a movable coil are formed so as to be positionable between adjacent comrades of the first yoke, so that the magnetic flux of the first permanent magnet is A first magnetic path is guided through a first yoke, and a second plane is parallel to the first plane and is spaced apart from the first plane, facing the first permanent magnet in the same arrangement form. The second permanent magnets are arranged in the same number as the first permanent magnets, and the second permanent magnets are made of magnetic material and are provided on both sides of the second permanent magnets to concentrate and guide the magnetic flux from the permanent magnets.
The movable coil is formed to be positionable between the yoke and the second yoke, corresponding to the first magnetic path, and the magnetic flux from the second permanent magnet is directed to the second yoke.
The second magnetic path is guided through the yoke.
and the first permanent magnet and the second permanent magnet are magnetized in mutually opposite directions along the circumferential arrangement direction thereof. A driving magnetic flux forming device for a moving coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4886280A JPS56145767A (en) | 1980-04-14 | 1980-04-14 | Driving magnetic flux forming device for movable coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4886280A JPS56145767A (en) | 1980-04-14 | 1980-04-14 | Driving magnetic flux forming device for movable coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56145767A JPS56145767A (en) | 1981-11-12 |
| JPH027268B2 true JPH027268B2 (en) | 1990-02-16 |
Family
ID=12815078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4886280A Granted JPS56145767A (en) | 1980-04-14 | 1980-04-14 | Driving magnetic flux forming device for movable coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56145767A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100309355B1 (en) * | 1993-09-07 | 2001-12-15 | 오까다 마사하루 | Cure Dispenser |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5141859A (en) * | 1974-10-04 | 1976-04-08 | Fujitsu Ltd | JIKAIHATSUSE ISOCHI |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5350459U (en) * | 1976-10-01 | 1978-04-28 | ||
| JPS5473917U (en) * | 1977-11-04 | 1979-05-25 |
-
1980
- 1980-04-14 JP JP4886280A patent/JPS56145767A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5141859A (en) * | 1974-10-04 | 1976-04-08 | Fujitsu Ltd | JIKAIHATSUSE ISOCHI |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56145767A (en) | 1981-11-12 |
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