Liquid ejecting head and fabricating method for liquid ejecting head

Patent metadata

Field	Value
Publication number	US-9370928-B2
Application number	US-201514721246-A
Country	US
Kind code	B2
Filing date	May 26, 2015
Priority date	May 30, 2014
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

There are provided a liquid ejecting head having a high fabrication efficiency and a high reliability of an electric connector, and a fabricating method for the liquid ejecting head. A direction in which a channel forming member is incorporated to a casing crosses a direction in which a flat spring is resiliently deformed. In incorporating the channel forming member, an abutment portion formed at the flat spring is allowed to abut on the casing, thus deforming the flat spring. The flat spring is brought into contact with an inside contact pad by a resilient restoring force of the flat spring.

First claim

What is claimed is:

1. A liquid ejecting head comprising:
a main body provided with an ejecting portion capable of ejecting liquid supplied through a liquid channel and an electric contact portion;
a channel forming member that is connected to the main body in a first direction so as to form the liquid channel; and
a conductive flat spring that is fixed to the channel forming member and is brought into contact with the electric contact portion by a resilient restoring force in a case where the flat spring is deformed in a second direction crossing the first direction,
wherein the flat spring is provided with an abutment portion that abuts on the main body so as to resiliently deform the flat spring in the second direction in a case where the channel forming member is connected to the main body in the first direction, and
the flat spring includes a plurality of bent portions whose bend angles are changed in a case where the flat spring is resiliently deformed in the second direction.

2. The liquid ejecting head according to claim 1 , wherein the flat spring includes a flat portion that is inclined relative to the first direction, and further, the abutment portion is positioned at the flat portion.

3. The liquid ejecting head according to claim 1 , wherein the main body includes a through-hole that allows the flat spring to be deformed by the resilient restoring force.

4. The liquid ejecting head according to claim 3 , wherein the flat spring is brought into contact with the electric contact portion through the through-hole.

5. The liquid ejecting head according to claim 4 , wherein the electric contact portion is disposed at a wiring board, the wiring board being fixed to the main body such that the electric contact portion faces the through-hole.

6. The liquid ejecting head according to claim 1 , wherein among the plurality of bent portions, there is a special bent portion whose bend angle is most largely changed in a case where the flat spring is connected to the main body, a bend angle of the special bent portion being reduced in the case where the flat spring is connected to the main body.

7. The liquid ejecting head according to claim 1 , wherein the plurality of bent portions include a first bent portion whose bend angle is reduced in a case where the flat spring is connected to the main body and a second bent portion whose bend angle is increased in a case where the flat spring is resiliently deformed in the second direction, and
the bent portion whose bend angle is most largely changed in the case where the flat spring is resiliently deformed in the second direction is the first bent portion.

8. A liquid ejecting head comprising:
a main body provided with an ejecting portion capable of ejecting liquid supplied through a liquid channel and an electric contact portion;
a channel forming member that is connected to the main body in a first direction so as to form the liquid channel; and
a conductive flat spring that is fixed to the channel forming member and is brought into contact with the electric contact portion by a resilient restoring force in a case where the flat spring is deformed in a second direction crossing the first direction,
wherein the flat spring is provided with an abutment portion that abuts on the main body so as to resiliently deform the flat spring in the second direction in a case where the channel forming member is connected to the main body in the first direction, and
wherein the flat spring is electrically connected to an electrode pin provided on the channel forming member, the electrode pin configured to detect liquid in the liquid channel.

9. A liquid ejecting head comprising:
a main body provided with an ejecting portion capable of ejecting liquid supplied through a liquid channel and an electric contact portion;
a channel forming member that is connected to the main body in a first direction so as to form the liquid channel; and
a conductive flat spring that is fixed to the channel forming member and is brought into contact with the electric contact portion by a resilient restoring force in a case where the flat spring is deformed in a second direction crossing the first direction,
wherein the flat spring is provided with an abutment portion that abuts on the main body so as to resiliently deform the flat spring in the second direction in a case where the channel forming member is connected to the main body in the first direction,

wherein the ejecting portion is provided with an ejection energy generating element configured to eject liquid,
the main body is provided with a wiring board to be electrically connected to the electric contact portion and an element board to be electrically connected to the ejection energy generating element, and
the wiring board and the element board are arranged at the same side of the main body.

10. The liquid ejecting head according to claim 9 , wherein the wiring board and the element board are arranged within the same plane at the main body.

11. A fabricating method for a liquid ejecting head comprising a main body provided with an ejecting portion capable of ejecting liquid supplied through a liquid channel and an electric contact portion; a channel forming member that is connected to the main body in a first direction so as to form the liquid channel; and a flat spring that is fixed to the channel forming member and is brought into contact with the electric contact portion by a resilient restoring force in a case where the flat spring is deformed in a second direction crossing the first direction, the fabricating method comprising the step of:
allowing an abutment portion of the flat spring to abut the main body so as to resiliently deform the flat spring in the second direction in a case where the channel forming member is connected to the main body in the first direction,
wherein a wiring board provided with the electric contact portion is fixed to the main body in the second direction, after the channel forming member is connected to the main body.

12. A fabricating method for a liquid ejecting head comprising a main body provided with an ejecting portion capable of ejecting liquid supplied through a liquid channel and an electric contact portion; a channel forming member that is connected to the main body in a first direction so as to form the liquid channel; and a flat spring that is fixed to the channel forming member and is brought into contact with the electric contact portion by a resilient restoring force in a case where the flat spring is deformed in a second direction crossing the first direction, the fabricating method comprising the step of:
allowing an abutment portion of the flat spring to abut the main body so as to resiliently deform the flat spring in the second direction in a case where the channel forming member is connected to the main body in the first direction,
wherein a wiring board provided with the electric contact portion is fixed to the main body, before the channel forming member is connected to the main body.

13. A liquid ejecting head comprising:
a main body;
an ejecting portion capable of ejecting liquid supplied through a liquid channel;
an electric wiring board provided with a contact portion configured to receive a signal from the outside;
a channel forming member configured to form the liquid channel; and
a conductive flat spring that is electrically connected to the contact portion,
wherein the channel forming member is fixed to the main body via a fixing portion that is inserted into the main body in a first direction, and
a through-hole penetrating in a second direction crossing the first direction is formed in the ma

Assignees

• Canon Kk

Inventors

• Toda Kyosuke
• Kudo Kiyomitsu
• Kimura Satoshi

Classifications

• B41J2/14024 Primary

  Assembling head parts · CPC title

• Y10T29/49403

  Tapping device making · CPC title

• B41J2002/14491

  Electrical connection · CPC title

• B41J2/14072

  Electrical connections, e.g. details on electrodes, connecting the chip to the outside... · CPC title

• B41J2/1433 Primary

  Structure of nozzle plates · CPC title