Liquid discharge apparatus

Patent metadata

Field	Value
Publication number	US-9849680-B2
Application number	US-201715424139-A
Country	US
Kind code	B2
Filing date	Feb 3, 2017
Priority date	Feb 5, 2016
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

There is provided a liquid discharge apparatus including a liquid discharge head, a carriage, a cap, and a cap moving mechanism configured to locate the cap in a capping position and in an uncapping position. The cap moving mechanism has a moving member configured to move integrally with the cap in a first direction, a carriage locker, and a restraint portion configured to restrain the moving member from rotating about an axis orthogonal to the first direction. The restraint portion restrains the moving member from rotating such that when the cap arrives in the uncapping position, the rotating range of the carriage locker does not overlap with the carriage in a scanning direction.

First claim

What is claimed is:

1. A liquid discharge apparatus comprising:
a liquid discharge head including a nozzle surface having a nozzle;
a carriage mounting the liquid discharge head thereon and being movable in a first direction;
a cap configured to contact with the liquid discharge head to cover the nozzle; and
a cap moving mechanism configured to move the cap in a second direction intersecting the nozzle surface to locate the cap in a capping position in contact with the liquid discharge head to cover the nozzle, and in an uncapping position separated away from the liquid discharge head, the cap moving mechanism including:
a moving member holding the cap to be rotatable about a first rotational axis orthogonal to the nozzle surface and configured to move integrally with the cap in the second direction;
a carriage locker provided on the moving member to rotate integrally with the moving member and configured to restrain the carriage from moving in the first direction, the carriage locker overlapping with the carriage in the first direction with the cap in the capping position, and not overlapping with the carriage in the first direction with the cap in the uncapping position; and
a restraint portion configured to restrain the moving member from rotating about a second rotational axis orthogonal to the second direction,

wherein the restraint portion restrains the moving member from rotating such that when the cap arrives in the uncapping position, a rotating range of the carriage locker rotated with the moving member does not overlap with the carriage in the first direction.

2. The liquid discharge apparatus according to claim 1 , wherein the carriage locker is configured to restrain the carriage from moving in the first direction by contacting with the carriage.

3. The liquid discharge apparatus according to claim 1 , wherein the restraint portion is configured to restrain the moving member from rotating about the second rotational axis by contacting with the moving member.

4. The liquid discharge apparatus according to claim 1 , wherein the cap moving mechanism moves the cap in the second direction to locate the cap in the capping position, in the uncapping position, and in a retreat position farther away from the liquid discharge head than the uncapping position.

5. The liquid discharge apparatus according to claim 1 , wherein the cap moving mechanism includes a base member including a guide portion guiding the moving member in the second direction, and
wherein the restraint portion is provided on the base member.

6. The liquid discharge apparatus according to claim 1 , wherein the carriage locker includes an interspace in the first direction between the carriage locker and the carriage with the cap in the capping position;
wherein the cap is fitted to have a predetermined backlash from the moving member in the first direction; and
wherein in the first direction, the length of the interspace between the carriage and the carriage locker is shorter than the length of the backlash between the cap and the moving member.

7. The liquid discharge apparatus according to claim 1 ,
wherein the moving member includes a moving force reception portion and a cam portion connected with the moving force reception portion to apply a force to the moving force reception portion for moving the moving member in the second direction.

8. The liquid discharge apparatus according to claim 7 ,
wherein the moving force reception portion includes a plurality of moving force reception portions aligned in one row in a third direction orthogonal to the second direction.

9. The liquid discharge apparatus according to claim 8 ,
wherein the cam portion is movable in a fourth direction orthogonal to both the second direction and the third direction, and includes a cam surface extending along the fourth direction and inclining with respect to the fourth direction; and
wherein the moving force reception portion is configured to contact with the cam surface.

10. The liquid discharge apparatus according to claim 7 ,
wherein the moving force reception portion is connected with the cam portion to be rotatable with the third direction as a rotational axis;
wherein the carriage locker is arranged away from the moving force reception portion in a fourth direction orthogonal to both the second direction and the third direction; and
wherein the moving member includes a contact portion contactable with the restraint portion, the contact portion being arranged in a position closer to the carriage locker than the moving force reception portion respectively in the second direction and in the fourth direction.

11. The liquid discharge apparatus according to claim 10 ,
wherein the moving member includes a frame holding the cap and having the moving force reception portion, and a locker stand portion arranged on an outer side of the frame such that the carriage locker stands on the locker stand portion in the second direction; and
wherein the contact portion stands from the locker stand portion in a direction orthogonal to the second direction.

12. The liquid discharge apparatus according to claim 1 , further comprising a cap holding member held by the moving member to be rotatable within the nozzle surface to hold the cap,
wherein the moving member is made of a higher hardness material than the cap holding member.

13. A liquid discharge apparatus comprising:
a liquid discharge head including a nozzle surface having a nozzle;
a carriage mounting the liquid discharge head thereon and being movable in a first direction;
a cap configured to contact with the liquid discharge head to cover the nozzle; and
a cap moving mechanism configured to move the cap in a second direction intersecting the nozzle surface to locate the cap in a capping position in contact with the liquid discharge head to cover the nozzle, and in an uncapping position separated away from the liquid discharge head, the cap moving mechanism including:
a moving member holding the cap to be rotatable within the nozzle surface and to move integrally with the cap in the second direction;
a carriage locker provided on the moving member, the carriage locker overlapping with the carriage in the first direction with the cap in the capping position, and not overlapping with the carriage in the first direction with the cap in the uncapping position; and
a base member supporting the moving member to be movable in the second direction, the base member including a gap in the first direction between the base member and the moving member,

wherein the carriage locker includes an interspace in the first direction between the carriage locker and the carriage with the cap in the capping position, and
wherein the gap in the first direction between the base member and the moving member is smaller than the interspace in the first direction between the carriage locker and the carriage with the cap in the capping position.

14. The liquid discharge apparatus according to claim 13 ,
wherein the carriage includes a recess larger in size than the carriage locker, and
wherein the carriage locker is inserted in the recess with the cap in the capping position.

15. The liquid discharge apparatus according to claim 13 ,
wherein the base member includes a guide portion guiding the moving member in the second direction.

Assignees

• Brother Ind Ltd

Inventors

• Ogawa Mikio

Classifications

• B41J2/16508 Primary

  connected with the printer frame · CPC title

• B41J2/16511

  Constructions for cap positioning (B41J2/16547 takes precedence) · CPC title

• B41J2002/16594

  Pumps or valves for cleaning · CPC title

• B41J2/1652

  by driving a fluid through the nozzles to the outside thereof, e.g. by applying pressure to the inside or vacuum at the outside of the print head · CPC title

• B41J2/16517

  Cleaning of print head nozzles (B41J2/16505, B41J2/1707 take precedence) · CPC title