The present application is based on, and claims priority from JP Application Serial Number 2019-011964, filed Jan. 28, 2019, the disclosure of which is hereby incorporated by reference herein in its entirety.

BACKGROUND

1. Technical Field

The present disclosure relates to a liquid ejecting apparatus including a carriage unit that has a liquid ejecting head ejecting liquid onto a medium.

2. Related Art

JP-A-2012-179728 discloses a serial type recording apparatus (an example of a liquid ejecting apparatus) including a carriage that has a recording head (an example of a liquid ejecting head). The recording apparatus includes a first guide portion disposed along a moving direction of the carriage. A base end portion of the carriage is slidably attached to the first guide portion via first sliding portions positioned at both ends in a width direction. The recording apparatus includes an ink tube that supplies ink from a liquid supply source to the carriage. One end of the ink tube is coupled to the liquid supply source, and the other end is coupled to the recording head at a tip of the carriage via a U-shaped reversing portion. A tube holding member, which holds the ink tube at a position near a coupling portion coupled to the recording head, is fixed to the carriage. The position where the tube holding member is fixed to the carriage is between the first sliding portions positioned at both ends of the carriage in the width direction. The recording apparatus adopts a structure in which tubes are routed so that a plurality of ink tubes are horizontally curved at the U-shaped reversing portion in a state in which the tubes are aligned in a vertical direction.

However, in a structure in which tubes are routed in a state of being horizontally curved, a curved state of portions of the tubes, which extend from a coupling location to the carriage, may be changed according to a position of the carriage on a movement path, and thus the tubes may come into contact with the carriage. In such a case, the carriage receives a reaction force of the tube not only at the coupling location but also at the contact location, and the position and direction receiving the reaction force of the tubes change. Therefore, a posture of the carriage deviates and sliding resistance of the carriage changes. The deviation of the posture of the carriage causes a change in a liquid ejecting direction, while the change in the sliding resistance of the carriage causes a change in a speed of the carriage. There is a problem in that printing accuracy is decreased due to at least one of the change in the liquid ejecting direction and the change in the speed of the carriage. The problem is not limited to the structure in which a plurality of tubes are aligned and routed, and there is the similar problem even in a structure of one tube is routed.

SUMMARY

According to an aspect of the present disclosure, there is provided a liquid ejecting apparatus including: a carriage unit that includes a liquid ejecting head ejecting liquid onto a medium and reciprocates in a scanning direction of the liquid ejecting head; a liquid container configured to store the liquid to be supplied to the liquid ejecting head and provided at a position different from a position where the carriage unit is disposed; and a tube that supplies the liquid sent from the liquid container to the carriage unit. When the carriage unit reciprocates, in a case in which one direction is referred to as a first direction and another direction is referred to as a second direction, the tube extends from the liquid container in the second direction, forms a curved portion curving toward upstream in a transport direction of the medium, is folded back in the first direction, and is coupled to the carriage unit. The carriage unit includes a space that expands in the transport direction upstream of an area in which a part of the tube extending from a coupling start point of coupling the tube to the carriage unit toward the curved portion is displaced in accordance with movement of the carriage unit.

