Liquid discharging head

Patent metadata

Field	Value
Publication number	US-11072172-B2
Application number	US-201916548539-A
Country	US
Kind code	B2
Filing date	Aug 22, 2019
Priority date	Aug 24, 2018
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A liquid discharging head includes a channel member having a nozzle surface formed with first nozzles, second nozzles, third nozzles and fourth nozzles. The channel member is formed with: a first distributing channel communicating with a first storage chamber and extending in a first direction, a second distributing channel communicating with a second storage chamber, extending in the first direction, and arranged side by side to the first distributing channel in a second direction, a first common channel communicating with the first nozzles, a second common channel communicating with the second nozzles, a third common channel communicating with the third nozzles, and a fourth common channel communicating with the fourth nozzles. The first to fourth common channels each extend in a third direction crossing the first and second directions, and partially overlaps with the first and second distributing channels in a fourth direction orthogonal to the nozzle surface.

First claim

What is claimed is:

1. A liquid discharging head comprising a channel member having a nozzle surface in which first nozzles, second nozzles, third nozzles and fourth nozzles are formed, the channel member being formed with:
a first distributing channel communicating with a first storage chamber configured to store a first liquid and extending in a first direction along the nozzle surface;
a second distributing channel communicating with a second storage chamber configured to store a second liquid, extending in the first direction, and arranged side by side to the first distributing channel in a second direction orthogonal to the first direction and along the nozzle surface;
a first common channel communicating with the first nozzles, extending in a third direction crossing the first and second directions and along the nozzle surface, and having a portion overlapping with the first distributing channel in a fourth direction orthogonal to the nozzle surface and another portion overlapping with the second distributing channel in the fourth direction;
a second common channel communicating with the second nozzles, extending in the third direction, and having a portion overlapping with the first distributing channel in the fourth direction and another portion overlapping with the second distributing channel in the fourth direction;
a third common channel communicating with the third nozzles, extending in the third direction, and having a portion overlapping with the first distributing channel in the fourth direction and another portion overlapping with the second distributing channel in the fourth direction;
a fourth common channel communicating with the fourth nozzles, extending in the third direction, and having a portion overlapping with the first distributing channel in the fourth direction and another portion overlapping with the second distributing channel in the fourth direction;
a first connecting channel connecting the first distributing channel with the first common channel;
a second connecting channel connecting the first distributing channel with the second common channel;
a third connecting channel connecting the second distributing channel with the third common channel; and
a fourth connecting channel connecting the second distributing channel with the fourth common channel,
wherein the channel member has a first end which is one end in the second direction and a second end which is the other end in the second direction,
the first distributing channel is located, in the second direction, between the first end of the channel member and the second distributing channel, and
the first and second connecting channels are located, in the second direction, between the first end of the channel member and the third and fourth connecting channels.

2. The liquid discharging head according to claim 1 , wherein the third common channel is located, in the first direction, between the first common channel and the second common channel, and
the second common channel is located, in the first direction, between the third common channel and the fourth common channel.

3. The liquid discharging head according to claim 1 , further comprising:
a driving circuit provided on the channel member and configured to drive at least a part of driving elements configured to cause liquid to be discharged from the first nozzles, the second nozzles, the third nozzles and the fourth nozzles, respectively;
a wiring member having one end connected to the driving circuit and the other end; and
a wiring substrate connected to the other end of the wiring member, and arranged at a position at which the wiring substrate sandwiches, in the second direction, the first end of the channel member between the wiring substrate and the first and second distributing channels.

4. The liquid discharging head according to claim 1 , further comprising:
a driving circuit provided on the channel member and configured to drive at least a part of driving elements configured to cause liquid to be discharged from the first nozzles, the second nozzles, the third nozzles and the fourth nozzles, respectively;
a wiring member having one end connected to the driving circuit and the other end; and
a wiring substrate connected to the other end of the wiring member, and arranged at a position at which the wiring substrate sandwiches, in the fourth direction, the first distributing channel and the second distributing channel between the wiring substrate and the first common channel, the second common channel, the third common channel and the fourth common channel.

5. The liquid discharging head according to claim 3 , wherein the one end of the wiring member is located, in the second direction, between the first end of the channel member and the first and second distributing channels, and
the wiring member is extended from the one end of the wiring member in a direction from the first and second distributing channels toward the first end of the channel member, along the second direction.

6. The liquid discharging head according to claim 5 , wherein a separation distance in the second direction between the first end of the channel member and the first distributing channel is greater than a separation distance in the second direction between the second end of the channel member and the second distributing channel.

7. The liquid discharging head according to claim 5 , wherein the channel member further has a third end which is one end in the first direction and a fourth end which is the other end in the first direction,
an angle defined by the first end and the third end of the channel member is an obtuse angle,
an angle defined by the first end and the fourth end of the channel member is an acute angle, and
a distance from a connection portion between the first and third ends of the channel member to the one end of the wiring member is smaller than a distance from a connection portion between the first and fourth ends of the channel member to the one end of the wiring member.

8. The liquid discharging head according to claim 5 , further comprising:
a casing in which the channel member, the driving circuit, the wiring member and the wiring substrate are arranged, and which has a first side wall constructing one end in the second direction of the casing and a second side wall constructing the other end in the second direction of the casing;
an opening formed in the first side wall; and
a cover attached to the first side wall and movable between an open position where the opening is not covered by the cover and a closed position where the opening is covered by the cover,
wherein a separation distance in the second direction between the first end of the channel member and the first side wall is smaller than a separation distance in the second direction between the second end of the channel member and the first side wall.

9. The liquid discharging head according to claim 5 , further comprising a casing in which the channel member, the driving circuit, the wiring member and the wiring substrate are arranged, and which has a first casing and a second casing attached to the first casing such that the second casing is swingably movable relative to the first casing about a swinging axis along the first direction, the second casing being configured to have a state in which the second casing defines an opening and a state in which the second casing closes the opening,
wherein a separation distance in the second direction between the first end of the channel member and the swinging axis is greater than a separation distance in the second direction between the second end of the channel member and the swinging axis.

10. The liquid discharging head according to claim

Assignees

• Brother Ind Ltd

Inventors

• Kakiuchi Toru
• Kato Yasuo
• Ito Yuichi

Classifications

• B41J2002/14241

  having a cover around the piezoelectric thin film element · CPC title

• B41J2/1433 Primary

  Structure of nozzle plates · CPC title

• B41J2002/14419

  Manifold · CPC title

• B41J2002/14491

  Electrical connection · CPC title

• B41J2202/21

  Line printing · CPC title