JP2009143175A - Printing head and manufacturing method for printing head - Google Patents

Printing head and manufacturing method for printing head Download PDF

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Publication number
JP2009143175A
JP2009143175A JP2007324842A JP2007324842A JP2009143175A JP 2009143175 A JP2009143175 A JP 2009143175A JP 2007324842 A JP2007324842 A JP 2007324842A JP 2007324842 A JP2007324842 A JP 2007324842A JP 2009143175 A JP2009143175 A JP 2009143175A
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Japan
Prior art keywords
armature
hole
wire
print head
guide
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Pending
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JP2007324842A
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Japanese (ja)
Inventor
Hideyo Hashimoto
英世 橋本
Original Assignee
Nec Fielding Ltd
Necフィールディング株式会社
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Publication date
Application filed by Nec Fielding Ltd, Necフィールディング株式会社 filed Critical Nec Fielding Ltd
Priority to JP2007324842A priority Critical patent/JP2009143175A/en
Publication of JP2009143175A publication Critical patent/JP2009143175A/en
Application status is Pending legal-status Critical

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Abstract

An object of the present invention is to provide a print head and a print head manufacturing method capable of suppressing an increase in the number of parts and an increase in manufacturing cost and preventing an armature assembly error.
A print head according to the present invention includes an armature 1 joined to a plate spring 9 and a guide frame 6 provided with a pin guide for guiding a wire 4. A non-through hole 2 is formed in the armature 1, and the wire 4 is inserted into the hole 2 and brazed to the armature 1 in the hole 2.
[Selection] Figure 4

Description

  The present invention relates to a print head for a dot printer.

  In recent years, print heads for dot printers tend to increase the number of parts and the number of wires constituting the print head in order to increase the definition. Therefore, it is necessary to prepare several kinds of armature and wire angles, and several kinds of armature assemblies are required.

For example, in the case of a 24 dot matrix type, a conventional print head has an armature assembly with four different angles. Therefore, four types of armatures with different tip angles are necessary, and four types of brazing jigs are also required.
JP-A-57-105756 JP 58-112759 A

  However, an increase in the number of parts due to an increase in the number of types of armature assemblies and an increase in manufacturing cost have been problems. Furthermore, when the print head is assembled, there are cases where the armature assembly is mistaken due to the presence of several types of armature assemblies.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a print head and a print head manufacturing method that can suppress an increase in the number of parts and an increase in manufacturing cost, and prevent an armature assembly error.

  To achieve the above object, the print head of the present invention has an armature joined to a leaf spring and a guide frame having a pin guide for guiding a wire, and the armature has a hole formed therein. The wire is inserted into the hole and brazed to the armature within the hole.

  According to the present invention, it is possible to suppress an increase in the number of parts and an increase in manufacturing cost, and it is possible to prevent an occurrence of a wrong combination of armatures.

  FIG. 1 is a side sectional view of a print head of a dot matrix printer according to this embodiment. 2 is a plan view of the armature 1 of the present embodiment, and FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is a side sectional view of the armature for explaining a method of attaching the wire to the armature. FIG. 5 is a side sectional view of the driven assembly for explaining the assembly method of the driven assembly.

  The print head has a configuration in which a driven assembly 20 and a yoke assembly 21 are combined.

  The driven assembly 20 includes an armature 1, a leaf spring 9, and a guide frame 6.

  Three intermediate guides 7 are provided in the nose 6 a of the guide frame 6. A through hole for inserting the wire 4 is formed in the intermediate guide 7. The through hole has a truncated cone shape in order to smoothly insert the wire 4. These intermediate guides 7 are guide members for linearly transmitting an impact when the wire 4 impacts. If the intermediate guide 7 is not provided, the wire 4 is bent and normal printing cannot be performed. These intermediate guides 7 are also members for guiding the wire 4 to the hole 2 formed in the armature 1.

  The yoke assembly 21 includes a spacer 10, a permanent magnet 11, a coil 12, and a yoke 13. The permanent magnet 11 is disposed between the spacer 10 and the yoke 13, and a coil 12 is wound around one end of the yoke 13.

The armature 1 joined to one end of the leaf spring 9 is disposed to face the yoke 13. The other end of the leaf spring 9 is fixed on the spacer 10. A wire 4 is joined to the free end 1 a of the armature 1.
The permanent magnet 11 forms a magnetic circuit together with the yoke 13 and the armature 1.

  As shown in FIGS. 2 and 3, a hole 2 is formed in the free end 1 a of the armature 1. The hole 2 is a non-through hole in order to hold the brazing material and the wire 4 therein.

  Next, the operation will be described.

  When the armature 1 is not in operation, the armature 1 is attracted to one end of the yoke 13 by the magnetic force of the permanent magnet 11, and the leaf spring 9 is bent. When the coil 12 is energized as necessary, the magnetic force of the permanent magnet 11 is canceled by the magnetic flux generated by the coil 12, and the armature 8 leaves the yoke 13 by the energy stored in the leaf spring 9 and is joined to the free end of the armature 1. The wire 4 is driven. After moving the wire 4, the current to the coil 10 is turned off and the magnetic flux is turned off. Thus, the armature 1 is attracted by the magnetic force of the permanent magnet 11 and comes into contact with the yoke 13. The above operation is repeated for printing.

  Next, a method for manufacturing the print head of the present embodiment, particularly a method for attaching a wire, will be described with reference to FIGS.

  As shown in FIG. 5, a brazing material 3 is applied to the hole 2 formed in the armature 1, and the wire 4 is inserted.

  As shown in FIG. 5, a plate spring 9 in which the armature 1 is welded is set on the armature positioning jig 5. The brazing material 3 has already been applied to the hole 2 of the armature 1.

  Next, the guide frame 6 to which the pin guide 8 and the intermediate guide 7 are attached is attached to the armature positioning jig 5. Subsequently, the wire 4 is inserted through the pin guide 8 and the intermediate guide 7 into the hole 2 of the armature 1 where the brazing material 3 is applied. After inserting the wire 4 into the hole 2, the brazing material 3 is melted by a brazing machine applied in the hole 2, and the armature 1 and the wire 4 are fixed together.

  When the armature positioning jig 5 is removed, the driven assembly 20 is completed. A print head is completed by attaching a yoke assembly 21 to the driven assembly 20.

  In the wire connection method of the present embodiment, the wire 4 is inserted into the hole 2 to which the brazing material 3 is applied, with the plate spring 9 and the guide frame 6 to which the armature 1 is welded being fixed to the armature positioning jig 5. Thereafter, the wire 4 is fixed to the armature 1 by the brazing material 3. In this way, in order to fix the wire 4, according to the present invention, the angle between the armature 1 and the wire 4 is automatically determined. Therefore, it is not necessary to prepare an armature assembly (an armature and a wire brazed) having several types of angles, and only one type of armature needs to be prepared.

  In the case of a conventional print head of a 24 dot matrix type, an armature assembly having four angles is required. Therefore, four types of armatures with different tip angles are necessary, and four types of brazing jigs are also required.

  On the other hand, in the case of the present invention, one type of armature is sufficient, and a brazing jig is also unnecessary. Further, the pin guide 8, the intermediate guide 7 and the guide frame 6 used for attaching the wire 4 are not assembly jigs but are components of the print head. That is, according to this invention, the jig | tool for attaching the wire 4 is also unnecessary. Therefore, according to the present invention, the manufacturing cost of the print head can be suppressed.

  Furthermore, in the case of the present invention, since only one type of armature is sufficient, an assembly error due to a wrong type of armature does not occur.

  Further, according to the present invention, the armature 1 is arranged on the armature positioning jig 5, the driven assembly 20 on which the wire 4 is not mounted is mounted thereon, and then the wire 4 is assembled, and finally the brazing machine is batched. Do brazing. That is, according to the present invention, since the armature 1 and the wire 4 are set separately and brazed together in a state in which each component is incorporated, variations in the size of each component can be absorbed.

1 is a side sectional view of an embodiment of a print head of a dot matrix printer of the present invention. It is a top view of one embodiment of the armature of the present invention. It is sectional drawing in the AA in FIG. It is a sectional side view of the armature for demonstrating the attachment method of the wire to an armature. It is a sectional side view of the driven assembly for demonstrating the assembly method of a driven assembly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Armature 2 Brazing material application hole 3 Brazing material 4 Wire 5 Positioning jig 6 Guide frame 7 Intermediate guide 8 Pin guide 9 Plate spring 10 Spacer 11 Permanent magnet 12 Coil 13 Yoke

Claims (6)

  1. An armature joined to a leaf spring;
    A guide frame having a pin guide for guiding the wire,
    A print head in which a hole is formed in the armature, and the wire is inserted into the hole and brazed to the armature in the hole.
  2.   The print head according to claim 1, wherein the hole is a non-through hole.
  3.   The guide frame has a nose positioned between the pin guide and the armature, and includes at least one intermediate guide in the nose for guiding the wire from the pin guide to the hole in the armature. The print head according to claim 1 or 2.
  4.   4. The print head according to claim 1, wherein the hole is formed on a side to be a free end of the armature in a state where the armature is joined to the leaf spring. 5.
  5. A plate spring, an armature joined to the plate spring and formed with a non-through hole, and a pin guide for guiding a wire and at least one intermediate guide for guiding the wire from the pin guide to the hole in the armature A driven assembly having a guide frame including: a yoke disposed opposite to the armature; a coil disposed in a core portion of the yoke; and a permanent magnet that forms a magnetic circuit together with the yoke and the armature. A yoke assembly comprising: a printhead manufacturing method comprising:
    Applying a brazing material in the holes of the armature in which non-through holes are formed;
    Fixing the plate spring and the guide frame to which the armature is fixed to an armature positioning jig;
    Inserting the wire into the hole through the pin guide and the intermediate guide;
    Brazing the wire to the armature within the hole in the armature;
    Removing the armature positioning jig and attaching the yoke assembly to the driven assembly after the brazing is completed.
  6.   The method for manufacturing a print head according to claim 5, wherein the plurality of armatures and the plurality of wires are brazed together.
JP2007324842A 2007-12-17 2007-12-17 Printing head and manufacturing method for printing head Pending JP2009143175A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007324842A JP2009143175A (en) 2007-12-17 2007-12-17 Printing head and manufacturing method for printing head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007324842A JP2009143175A (en) 2007-12-17 2007-12-17 Printing head and manufacturing method for printing head

Publications (1)

Publication Number Publication Date
JP2009143175A true JP2009143175A (en) 2009-07-02

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JP2007324842A Pending JP2009143175A (en) 2007-12-17 2007-12-17 Printing head and manufacturing method for printing head

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57105757A (en) * 1980-12-24 1982-07-01 Fujitsu Ltd Optical printing device
JPS6064863A (en) * 1983-09-21 1985-04-13 Ogura Clutch Co Ltd Mounting method of printing wire in dot printer
JPS60219067A (en) * 1984-04-16 1985-11-01 Oki Electric Ind Co Ltd Wire printing head
JPS61291150A (en) * 1985-06-19 1986-12-20 Tokyo Electric Co Ltd Dot printer head
JPS6250072A (en) * 1985-08-30 1987-03-04 Canon Inc Wire dot head
JPS62279961A (en) * 1986-05-28 1987-12-04 Fuji Electric Co Ltd Printing head of wire dot printer
JPS6335351A (en) * 1986-07-31 1988-02-16 Brother Ind Ltd Armature fitting structure in printing head
JPH0255148A (en) * 1988-08-19 1990-02-23 Nec Corp Printing head
JP2006123233A (en) * 2004-10-27 2006-05-18 Seiko Epson Corp Recording head and recorder

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57105757A (en) * 1980-12-24 1982-07-01 Fujitsu Ltd Optical printing device
JPS6064863A (en) * 1983-09-21 1985-04-13 Ogura Clutch Co Ltd Mounting method of printing wire in dot printer
JPS60219067A (en) * 1984-04-16 1985-11-01 Oki Electric Ind Co Ltd Wire printing head
JPS61291150A (en) * 1985-06-19 1986-12-20 Tokyo Electric Co Ltd Dot printer head
JPS6250072A (en) * 1985-08-30 1987-03-04 Canon Inc Wire dot head
JPS62279961A (en) * 1986-05-28 1987-12-04 Fuji Electric Co Ltd Printing head of wire dot printer
JPS6335351A (en) * 1986-07-31 1988-02-16 Brother Ind Ltd Armature fitting structure in printing head
JPH0255148A (en) * 1988-08-19 1990-02-23 Nec Corp Printing head
JP2006123233A (en) * 2004-10-27 2006-05-18 Seiko Epson Corp Recording head and recorder

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