EP0358833B1 - Procédé de fabrication d'un ensemble pour têtes d'impression à matrice de fils du type à armature battante - Google Patents
Procédé de fabrication d'un ensemble pour têtes d'impression à matrice de fils du type à armature battante Download PDFInfo
- Publication number
- EP0358833B1 EP0358833B1 EP88730171A EP88730171A EP0358833B1 EP 0358833 B1 EP0358833 B1 EP 0358833B1 EP 88730171 A EP88730171 A EP 88730171A EP 88730171 A EP88730171 A EP 88730171A EP 0358833 B1 EP0358833 B1 EP 0358833B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- armature
- arms
- shaped plate
- blank
- cutting
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
- B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
- B41J2/27—Actuators for print wires
- B41J2/275—Actuators for print wires of clapper type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
- B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
- B41J2/235—Print head assemblies
- B41J2/24—Print head assemblies serial printer type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49105—Switch making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
- Y10T29/49208—Contact or terminal manufacturing by assembling plural parts
- Y10T29/49222—Contact or terminal manufacturing by assembling plural parts forming array of contacts or terminals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49789—Obtaining plural product pieces from unitary workpiece
- Y10T29/49796—Coacting pieces
Definitions
- the invention relates to a method for producing an armature assembly for matrix printheads of the hinged armature type, as well as the armature assembly itself, in which prefabricated parts are jointly processed after their connection by thermal cutting or water jet cutting, with elongated armature having an operating position above a magnetic core of an electromagnetic coil lying radially outer, wide anchor arms and adjoining them, actuating a pressure element, radially inner, narrower anchor arms are formed.
- the arrangement of the magnet system in the case of matrix printheads of the hinged armature type differs in that the pressure element (the pressure needle), which rests against an armature, is moved by spring force into the rear rest position.
- the electromagnet therefore counteracts the spring force.
- the anchors are with Equipped with individual springs.
- the assignment of an armature with a single spring to an electromagnetic coil means complicated, costly assembly, which is subject to the uncertainty of positional deviations.
- different driving forces, different paths and different movement distances are often the cause of an uneven dot print and a lower frequency in the case of matrix printheads of the hinged anchor type.
- the invention is based on the object, starting with the manufacturing process of an anchor assembly of the hinged anchor type, to reduce the manufacturing costs, to increase the accuracy of the assignment of anchors in matrix printheads of the hinged anchor type, to facilitate assembly and to save entire assembly steps.
- the anchors being able to be produced in a filigree manner without having to be collected, transported, distributed and assembled individually later.
- the thin shaped plate holds the anchors securely at a precise distance during their production and during operation, so that the entire armature assembly can be assembled in the form in which it is produced.
- the narrow anchor arms are particularly low in mass, which allows an increase in the pressure needle frequency. Manufacture and handling of the anchors are improved. The manufacturing costs are reduced.
- the positional accuracy of the anchors among themselves is very high.
- This manufacturing accuracy can be further increased by attaching mounting holes for the pressure needles in the anchor round in one operation. This step can also be carried out before the anchor arms are cut out.
- the separation of the individual armature arms can be done as a last step in that the radially outer armature arms are cut free after the flat, elastic, annular shaped plate has been attached to the armature arm adjacent to the circumference.
- the anchor assembly consisting of a pre-punched anchor plate and a sheet metal attached to the anchor plate, with the anchor plate and sheet metal lying on top of one another, gains new properties that also have a positive effect on the economy of handling, in particular internal transport and assembly. These properties are achieved by the molded sheet over the
- the circumference of the armature circular web and radial projections which are adapted to the contours of the radially outer arm and the radially inner arm, form and are designed as a one-piece leaf spring.
- the advantage of the webs running over the circumference of the armature blank is that of a joint, so that the armature can move individually during operation, but after manufacture and assembly form a coherent armature assembly together with the shaped plate.
- the shaped plate can also be fastened to the anchor round by means of welding points.
- Such welding spots are easy to attach due to the means used for thermal cutting. It is e.g. possible to use a laser beam one after the other for thermal cutting and welding the welding spots.
- the anchor assembly consists of two parts, namely the anchor round 1 with the outer diameter 1 a and a prefabricated, ring-shaped, flat, elastic shaped plate 2.
- the anchor round 1 will be in the area 3 between future radially outer ones Armature arms 4 and radially inner armature arms 5 are punched out with cutouts 6, with cutouts 7, which also take into account the radially outer armature arm 4, can also be punched out if these are not to be cut out later.
- the prefabricated, ring-shaped, flat, elastic molded sheet 2 is placed on the anchor blank 1 punched out in this way and fastened on the anchor blank 1, which is still in one piece.
- the shaped plate 2 has an outward radial extension 2a which partially covers the future radially outer armature arm 4 and an approximately triangular projection 2b which extends radially inward.
- the outward extension 2a and the inward triangular projection 2b are in one piece with a full ring 2c and together form the shaped plate 2.
- the anchor round 1 can also be punched out with a central, circular opening 1b if this is not to be cut out later.
- the shaped plate 2 is fastened by welding points 8 and 9 (by means of laser beams) in such a way that the annular surface 10 partially covers the cutouts 6. Radially outer sections 6a and radially inner sections 6b of the recess 6 each remain open.
- the individual, radially inner and / or radially outer anchor arms 4 and 5 are cut out by laser cutting, spark erosion or water jet cutting, so that the anchor arms 4 and 5 are formed after cutting along the cutting lines 11 and 12.
- mounting holes 13 can be done in one operation even before cutting on the cutting lines 11 and 12 by means of laser beams and the like. be drilled.
- the radially outer anchor arms 4 can now, if this has not already been done when cutting free on the cutting lines 11 and 12, successively cut free adjacent to one another over the circumference, a gap 15 being formed in each case.
- the shaped plate 2 has a central circumference (for example as shown)
- Anchor round 1 extending web such as forms the ring 2c and radial projections are provided, which are adapted to the contours of the radially outer armature arm 4 and the radially inner armature arm 5.
- These projections are identical or similar to the outward radial extension 2a or like the triangular projection 2b, but can in particular be kept longer.
- the welding points 8 and 9 are to be attached, the welding points 8 and 9 being attached to the outermost outlines for the shaped plate 2.
- the armature assembly produced by the method described above is installed as shown in FIG. 2.
- the pressure needles 14 are mounted in a pressure needle guide housing 16 and brought together in a pressure needle guide 17 in front of a pressure abutment 18.
- the pressure needle guide housing 16 also receives the armature assembly, which bears against an O-ring 19 on the one hand and against a damping ring 20.
- the damping ring 20 is on one Coil carrier 21 mounted, the magnetic yoke legs 22 and 23 forms.
- the outer magnetic yoke leg 22 carries the electromagnetic coil 24, which is in each case connected to an electrical circuit for actuating the electromagnetic coils 24 by means of a connection 25.
- each armature 26 stands with a gap distance 27 to the end faces of the magnetic yoke legs 22 and 23.
- each armature 26 lies flat on the end faces of the magnetic yoke legs 22 and 23 for a short time, and then immediately afterwards again in the to return to the drawn position.
- each armature 26 is supported by a restoring force which is also present in the shaped plate 2.
- springs 14 are assigned to the printing needles, as shown, for example, compression springs 28.
- the matrix print head is then closed at the rear with a heat sink 29, and a screw 30 connects the printing needle guide housing 16 and the bobbin holder 21 to form a unit.
Landscapes
- Impact Printers (AREA)
- Manufacture Of Motors, Generators (AREA)
Claims (5)
caractérisé par les étapes suivantes :
caractérisé en ce que
les trous de fixation (13) pour les aiguilles d'impression (14) dans le flan circulaire d'armature (1) sont réalisés en une seule opération.
caractérisé en ce que
les bras d'armature radialement externes (4) sont découpés après la fixation de la tôle profilée, annulaire, élastique, plate (2) au bras d'armature (4) à chaque fois adjacent sur la périphérie.
caractérisé en ce que
la tôle profilée est constituée d'une âme s'étendant sur une périphérie médiane du flan circulaire (1), et de saillies radiales, qui sont adaptées aux contours des bras d'armature radialement externes (4) et des bras d'armature radialement internes (5), et est réalisée en tant que ressort à lame en une pièce.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8888730171T DE3871391D1 (de) | 1988-08-01 | 1988-08-01 | Verfahren zum herstellen einer ankerbaugruppe fuer matrixdruckkoepfe der klappankerbauart. |
AT88730171T ATE76357T1 (de) | 1988-08-01 | 1988-08-01 | Verfahren zum herstellen einer ankerbaugruppe fuer matrixdruckkoepfe der klappankerbauart. |
EP88730171A EP0358833B1 (fr) | 1988-08-01 | 1988-08-01 | Procédé de fabrication d'un ensemble pour têtes d'impression à matrice de fils du type à armature battante |
JP1178892A JPH0274354A (ja) | 1988-08-01 | 1989-07-11 | フラップ接極子形マトリックス印字ヘッドの接極子構成要素の製造方法および接極子構成要素 |
US07/387,501 US5175922A (en) | 1988-08-01 | 1989-07-28 | Method for the manufacture of an armature assembly for matrix print heads of the hinged-clapper-armature construction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP88730171A EP0358833B1 (fr) | 1988-08-01 | 1988-08-01 | Procédé de fabrication d'un ensemble pour têtes d'impression à matrice de fils du type à armature battante |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0358833A1 EP0358833A1 (fr) | 1990-03-21 |
EP0358833B1 true EP0358833B1 (fr) | 1992-05-20 |
Family
ID=8200559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88730171A Expired - Lifetime EP0358833B1 (fr) | 1988-08-01 | 1988-08-01 | Procédé de fabrication d'un ensemble pour têtes d'impression à matrice de fils du type à armature battante |
Country Status (5)
Country | Link |
---|---|
US (1) | US5175922A (fr) |
EP (1) | EP0358833B1 (fr) |
JP (1) | JPH0274354A (fr) |
AT (1) | ATE76357T1 (fr) |
DE (1) | DE3871391D1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69429024T2 (de) * | 1993-05-13 | 2002-06-06 | Canon K.K., Tokio/Tokyo | Tintenbehälter, Druckkopfkassette und Tintenstrahldrucker |
US5575932A (en) * | 1994-05-13 | 1996-11-19 | Performance Controls, Inc. | Method of making densely-packed electrical conductors |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1273347A (en) * | 1968-06-26 | 1972-05-10 | Dowty Technical Dev Ltd | Electrical moving coil device |
US3921277A (en) * | 1973-11-08 | 1975-11-25 | Pitney Bowes Inc | Method of making printing disc |
US4019000A (en) * | 1974-12-16 | 1977-04-19 | Cts Corporation | Electrical switch with chemically milled contacts |
US4018639A (en) * | 1975-10-15 | 1977-04-19 | Xerox Corporation | Method of assembling a composite print wheel |
JPS5835474B2 (ja) * | 1977-05-26 | 1983-08-02 | エプソン株式会社 | ワイヤ式ドツトプリンタヘツドの構造 |
US4225250A (en) * | 1978-10-10 | 1980-09-30 | Tally Corporation | Segmented-ring magnet print head |
IT1162961B (it) * | 1983-10-14 | 1987-04-01 | Olivetti & Co Spa | Dispositivo stampante a fili od aghi particolarmente per unita periferiche di sistemi elettronici per l'elaborazione di dati |
DE3502472C2 (de) * | 1985-01-25 | 1987-05-14 | Mannesmann AG, 4000 Düsseldorf | Verfahren zum Herstellen einer Ankerbaugruppe eines Matrixdruckkopfes |
US4631824A (en) * | 1985-07-11 | 1986-12-30 | Bourns, Inc. | Method of manufacturing a multi-wire contact assembly |
-
1988
- 1988-08-01 EP EP88730171A patent/EP0358833B1/fr not_active Expired - Lifetime
- 1988-08-01 DE DE8888730171T patent/DE3871391D1/de not_active Expired - Lifetime
- 1988-08-01 AT AT88730171T patent/ATE76357T1/de not_active IP Right Cessation
-
1989
- 1989-07-11 JP JP1178892A patent/JPH0274354A/ja active Pending
- 1989-07-28 US US07/387,501 patent/US5175922A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ATE76357T1 (de) | 1992-06-15 |
EP0358833A1 (fr) | 1990-03-21 |
US5175922A (en) | 1993-01-05 |
DE3871391D1 (de) | 1992-06-25 |
JPH0274354A (ja) | 1990-03-14 |
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