Image recording apparatus

Patent metadata

Field	Value
Publication number	US-12391056-B2
Application number	US-202318338968-A
Country	US
Kind code	B2
Filing date	Jun 21, 2023
Priority date	Jun 27, 2022
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

An image recording apparatus includes a belt passed around a drive pulley and a driven pulley, a support member configured to support a recording head and fixed to the belt, a holder member, having a claw part, configured to hold the driven pulley, and a frame having a first opening for the claw part to penetrate. The holder member is attached to the frame such as to be movable relative to the drive pulley. The first opening has an enlarged opening portion allowing the claw part to pass through without engaging with the frame on one side closer to the drive pulley. At least a portion of the claw part is positioned within a part of the first opening excluding the enlarged opening portion in a state where the holder member is positioned in a predetermined location closer to the drive pulley.

First claim

What is claimed is:

1. An image recording apparatus comprising:
a belt passed around a drive pulley and a driven pulley;
a support member configured to support a recording head and fixed to the belt;
a holder member, having a claw part and an operating part, configured to hold the driven pulley;
a frame having a first opening through which the claw part is capable of penetrating from a front side to a back side of the frame and a second opening through which the operating part is capable of penetrating from the front side to the back side of the frame, and to which the holder member is attached such as to be movable relative to the drive pulley; and
a biasing member that applies a force to the operating part on the back side of the frame in a direction away from the drive pulley,
wherein the first opening having an enlarged opening portion allowing the claw part to pass through without engaging with the frame on one side closer to the drive pulley, and
wherein, in a state where movement of the holder member toward the drive pulley is restricted by the frame, at least a portion of the claw part is engaged with the frame and is positioned within a part of the first opening excluding the enlarged opening portion.

2. The image recording apparatus according to claim 1 , wherein,
in a state where the movement of the holder member toward the drive pulley is restricted by the frame, one end of the claw part farthest away from the drive pulley is positioned farther from the drive pulley than one end of the enlarged opening portion located farthest away from the drive pulley.

3. The image recording apparatus according to claim 1 , wherein
the frame includes a restricting part that restricts the movement of the holder member towards the drive pulley by making contact with the holder member,
the holder member includes a restricted part capable of making contact with the restricting part,
the holder member is configured so that the movement thereof toward the drive pulley is restricted in a state where the restricting part of the frame makes contact with the restricted part of the holder member,
the frame and the holder member satisfy a relationship of L1>L2, where L1 denotes a distance between one end of the claw part farthest away from the drive pulley and the restricted part along a direction of movement of the holder member relative to the drive pulley, and
L2 denotes a distance between one end of the enlarged opening portion farthest away from the drive pulley and the restricting part along the direction of movement of the holder member relative to the drive pulley.

4. The image recording apparatus according to claim 3 , wherein
the frame and the holder member satisfy a relationship of L3>L1, where L3 denotes a distance between one end of the first opening farthest away from the drive pulley and the restricting part along the direction of movement of the holder member relative to the drive pulley.

5. The image recording apparatus according to claim 1 , wherein
the second opening is positioned closer to the drive pulley than the first opening.

6. The image recording apparatus according to claim 3 , wherein
the restricting part is a portion of the first opening.

7. The image recording apparatus according to claim 3 , wherein
the restricting part is a portion of the second opening.

8. The image recording apparatus according to claim 1 , further comprising
at least one fixed driven pulley that remains stationary relative to the drive pulley, wherein
the belt is also passed around the fixed driven pulley.

9. The image recording apparatus according to claim 1 , wherein
the holder member moves relative to the drive pulley in parallel to a moving direction of the support member.

10. The image recording apparatus according to claim 8 , wherein
the holder member moves relative to the drive pulley in a direction intersecting with a moving direction of the support member.

Assignees

• Canon Kk

Inventors

• Abe Takashi
• Takanaka Yasuyuki
• Sakurai Norio
• Kohnotoh Atsushi
• Maruyama Taiji
• Naratani Yusuke
• Yamaguchi Shuhei
• Tanaka Kousuke

Classifications

• B41J19/005 Primary

  Cable or belt constructions for driving print, type or paper-carriages, e.g. attachment, tensioning means · CPC title

• B41J25/006 Primary

  for oscillating, e.g. page-width print heads provided with counter-balancing means or shock absorbers · CPC title