CN-115320252-B - Liquid ejecting apparatus and sub-carriage

Abstract

The invention provides a liquid ejecting apparatus and a sub-carriage for suppressing temperature variation in a liquid ejecting head. The liquid ejecting apparatus (1) is provided with a first liquid ejecting head (12) that ejects liquid, a sub-carriage (21) that holds the first liquid ejecting head (12), and a carriage (5) that holds the sub-carriage (21). The sub-carriage (5) has a first member (24) that has thermal conductivity and holds the first liquid ejecting head (12), and a heating section (38) that is provided on the first member (24). The first liquid ejecting head (12) has first side wall parts (13 a, 13 b) facing the first member (24). The heating section (38) is arranged so as to sandwich the first member (24) between the heating section and the first side wall sections (13 a, 13 b) when viewed in the direction of ejection of the liquid ejected from the first liquid ejecting head (12).

Inventors

• HANAOKA YUKIHIRO
• YAMAMOTO TAKAO

Assignees

• 精工爱普生株式会社
• 精工爱普生株式会社

Dates

Publication Date

20260421

Application Date

20220505

Priority Date

20210510

Claims (18)

1. 1. A liquid ejecting apparatus includes: A first liquid ejection head having an ejection face formed with a nozzle that ejects liquid; A sub-carriage having a first member that has thermal conductivity and holds the first liquid ejection head, and a heating portion provided on the first member; A carriage holding the sub-carriage, The first liquid ejection head has a first side wall portion opposed to the first member, The heating portion is disposed so as to sandwich the first member between the heating portion and the first side wall portion when viewed in an ejection direction of the liquid ejected from the first liquid ejecting head, and is disposed so as to surround the ejection surface of the first liquid ejecting head and the first side wall portion, The sub-carriage has a second member provided so as to be spaced apart from the heating portion by a first gap and to surround the heating portion when viewed in the ejection direction, The first member has a first frame body surrounding the ejection face of the first liquid ejection head and the first side wall portion when viewed in the ejection direction, The heating part is arranged on the first frame body, The first gap is larger than a second gap between an inner peripheral surface of the first frame and an outer peripheral surface of the first side wall portion when viewed in the ejection direction.
2. 2. The liquid ejecting apparatus as claimed in claim 1, wherein, The first side wall portion has thermal conductivity and is in thermal contact with the first member.
3. 3. The liquid ejecting apparatus as claimed in claim 1 or 2, wherein, The first member has a higher thermal conductivity than the first sidewall portion.
4. 4. The liquid ejecting apparatus as claimed in claim 1, wherein, The second member has a thermal conductivity lower than that of the first member.
5. 5. The liquid ejecting apparatus as claimed in claim 1 or 4, wherein, The first member has a thermal conductivity higher than that of the first sidewall portion, The second member has a thermal conductivity lower than that of the first side wall portion.
6. 6. The liquid ejecting apparatus as claimed in claim 1, wherein, The first member has a first frame body surrounding the ejection face of the first liquid ejection head and the first side wall portion when viewed in the ejection direction, The heating part is arranged on the first frame body, The second member covers an end of the first frame in the ejection direction when viewed in a direction opposite to the ejection direction.
7. 7. The liquid ejecting apparatus as claimed in claim 1, wherein, The first gap is more than 0.75mm, The second gap is greater than 0.00mm and less than 0.15 mm.
8. 8. The liquid ejecting apparatus as claimed in claim 1 or 7, wherein, The carriage is formed of a metal and, An opening into which the sub-carriage is inserted is formed in the carriage, The second member is disposed between an inner peripheral surface of an opening of the carriage and the first member when viewed in the ejection direction, A third gap between an inner peripheral surface of the opening of the carriage and an outer peripheral surface of the first portion of the second member is larger than the second gap when viewed in the ejection direction, The first portion is in the form of a plate, The plate thickness direction of the first portion is along the plate thickness direction of the heating portion, The first portion is disposed so as to surround the heating portion when viewed in the ejection direction.
9. 9. The liquid ejecting apparatus as claimed in claim 1, wherein, The carriage is formed of a metal and, The first side wall portion having thermal conductivity and being in thermal contact with the first member, The first member has a base portion that holds the first liquid ejection head, The sub-carriage has an abutting portion protruding from the base portion toward the carriage and contacting the carriage, The abutting portion has a lower thermal conductivity than the first side wall portion.
10. 10. The liquid ejecting apparatus as claimed in claim 1, wherein, The first liquid ejection head has an ejection face formed with nozzles ejecting liquid, The ejection face is located in the ejection direction with respect to an end of the sub-carriage in the ejection direction.
11. 11. The liquid ejecting apparatus as claimed in claim 1, wherein, Further provided with a second liquid ejecting head having a second side wall portion opposed to the first member, The first member of the sub carriage holds the first liquid ejection head and the second liquid ejection head, The heating portion is a planar heater surrounding both the first side wall portion and the second side wall portion.
12. 12. The liquid ejecting apparatus as claimed in claim 11, wherein, The first member has a first frame surrounding the first side wall portion and a second frame surrounding the second side wall portion when viewed in the ejection direction, The first liquid ejecting head and the second liquid ejecting head are arranged in an adjacent manner, The first frame and the second frame have at least a part of a common portion in common between the first liquid ejecting head and the second liquid ejecting head, The heating portion is provided along the outer periphery of the first and second frames.
13. 13. The liquid ejecting apparatus as claimed in claim 12, wherein, The sub-carriage has a second member provided so as to be spaced apart from the heating portion by a first gap and to surround the heating portion when viewed in the ejection direction, The first member and the second member are fixed to each other at a portion between the first frame and the second frame and not overlapping the common portion when viewed in the ejection direction.
14. 14. The liquid ejecting apparatus as claimed in claim 1, wherein, Further comprises a connector electrically connected to the heating unit, The first liquid ejection head includes a first head chip and a second head chip held on the first side wall portion, The first head chip and the second head chip are respectively in a strip shape in a first direction, The first head chip and the second head chip are disposed adjacent to each other and offset in the first direction and a second direction intersecting the first direction, The connector is arranged at a position in the first direction of the first head chip and a position in the second direction of the second head chip, and is held on the sub carriage.
15. 15. The liquid ejecting apparatus as claimed in claim 1, wherein, The first side wall portion is made of stainless steel, titanium or ceramic having thermal conductivity, The first component of the secondary carriage comprises at least one of aluminum, copper, silver, and gold.
16. 16. The liquid ejecting apparatus as claimed in claim 1, wherein, The first member of the sub-carriage is fastened to the carriage by a metal screw through a resin bushing.
17. 17. A sub-carriage provided in the liquid ejecting apparatus according to claim 1, the sub-carriage holding a liquid ejecting head ejecting liquid and being held by a carriage of the liquid ejecting apparatus, the sub-carriage comprising: a frame body which surrounds a side wall portion of the liquid ejecting head and has thermal conductivity when viewed in an ejection direction of the liquid ejected from the liquid ejecting head; And a heating unit provided on the outer peripheral surface of the housing.
18. 18. A liquid ejecting apparatus includes: a first liquid ejection head that ejects liquid; A sub-carriage having a first member that has thermal conductivity and holds the first liquid ejection head, and a heating portion provided on the first member; A carriage holding the sub-carriage, The first liquid ejection head has a first side wall portion opposed to the first member, The heating portion is arranged so as to sandwich the first member with the first side wall portion when viewed in an ejection direction of the liquid ejected from the first liquid ejecting head, The carriage is formed of a metal and, The first side wall portion having thermal conductivity and being in thermal contact with the first member, The first member has a base portion that holds the first liquid ejection head, The sub-carriage has an abutting portion protruding from the base portion toward the carriage and contacting the carriage, The abutting portion has a lower thermal conductivity than the first side wall portion.

Description

Liquid ejecting apparatus and sub-carriage Technical Field The present invention relates to a liquid ejecting apparatus and a sub-carriage. Background A liquid ejecting apparatus includes a liquid ejecting head having a supply path member, and a heater for heating ink in the liquid ejecting head. Patent document 1 discloses a liquid ejecting head in which a heater for heating ink is disposed on a side surface of a supply path member. Since the heater described in patent document 1 is directly fixed to the side surface of the liquid ejecting head, the distance from the heater to the flow path in the liquid ejecting head is short. Therefore, the heat of the heater is difficult to move in the in-plane direction of the side surface of the liquid ejecting head to which the heater is fixed, and therefore, temperature variation is likely to occur in the liquid ejecting head. In the liquid ejecting head to which the heater is directly fixed in this manner, there is a possibility that temperature unevenness may occur in the liquid ejecting head. Patent document 1 Japanese patent laid-open No. 2020-199638 Disclosure of Invention A liquid ejecting apparatus according to an embodiment of the present invention includes a first liquid ejecting head that ejects liquid, a sub-carriage that holds the first liquid ejecting head, and a carriage that holds the sub-carriage. The sub-carriage has a first member that has thermal conductivity and holds the first liquid ejection head, and a heating portion provided on the first member. The first liquid ejecting head has a first side wall portion opposed to the first member. The heating portion is disposed so as to sandwich the first member between the heating portion and the first side wall portion when viewed in an ejection direction of the liquid ejected from the first liquid ejecting head. A sub-carriage according to an embodiment of the present invention holds a head that ejects liquid on a carriage of a liquid ejecting apparatus, and includes a frame that surrounds a side wall portion of the head when viewed in an ejection direction of the liquid ejected from the head and has thermal conductivity, and a heating portion provided on an outer peripheral surface of the frame. Drawings Fig. 1 is a schematic view showing a liquid ejecting apparatus according to an embodiment. Fig. 2 is an exploded perspective view showing the head unit. Fig. 3 is a bottom view showing the liquid ejecting head held on the sub carriage. Fig. 4 is a plan view showing a liquid ejecting head held by a sub carriage. Fig. 5 is a side view showing the liquid ejection head held on the sub carriage. Fig. 6 is an exploded perspective view showing the liquid ejecting head. Fig. 7 is a schematic view showing the flow path of ink in the liquid ejecting apparatus. Fig. 8 is a cross-sectional view showing the head chip. Fig. 9 is a cross-sectional view showing the frame of the sub carriage, and shows a cross section intersecting the Z-axis direction. Fig. 10 is a sectional view showing the sub carriage, and shows a section along the X-X line in fig. 9. Fig. 11 is an enlarged cross-sectional view showing a main portion of the sub carriage. Fig. 12 is a sectional view showing a connection portion between the sub-carriage and the carriage, and shows a section along line XII-XII in fig. 9. Fig. 13 is a sectional view showing a fixing portion between the sub-carriage and the carriage, and shows a section along line XIII-XIII in fig. 9. Fig. 14 is an exploded perspective view showing the sub carriage. Fig. 15 is a perspective view showing a heater provided on the outer peripheral surface of the frame of the sub-carriage. Detailed Description Hereinafter, modes for carrying out the present invention will be described with reference to the drawings. However, in each of the drawings, the dimensions and scales of each portion are appropriately different from those of the actual case. Further, since the embodiments described below are preferred specific examples of the present invention, various technical preferred restrictions are imposed, but the scope of the present invention is not limited to these embodiments unless the description to the effect that the present invention is particularly restricted is given in the following description. In the following description, three directions intersecting each other may be referred to as an X-axis direction, a Y-axis direction, and a Z-axis direction. The X-axis direction includes an X1 direction and an X2 direction as directions opposite to each other. The Y-axis direction includes a Y1 direction and a Y2 direction as directions opposite to each other. The Z-axis direction includes a Z1 direction and a Z2 direction which are directions opposite to each other. The Z1 direction is a downward direction, and the Z2 direction is an upward direction. The Z1 direction is one example of the injection direction. The Y-axis direction is one example of the first direction. The X-axis direct