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CN-122003328-A - Liquid ejection head and recording apparatus

CN122003328ACN 122003328 ACN122003328 ACN 122003328ACN-122003328-A

Abstract

The liquid ejection head has a common flow path (11), a wide flow path (13), and a first damper chamber (15A). The common flow path (11) extends along the ejection face (7) provided with a plurality of ejection holes and communicates with the plurality of ejection holes. The wide flow path (13) is connected to the common flow path (11) and has a width (W1) that is wider than the width (W3) of the common flow path (11) when viewed in the normal direction of the ejection surface (7). The first damper chamber (15A) is disposed opposite to the wide flow path (13) from the first side in the normal direction, and has a width (W2) smaller than the width (W1) of the wide flow path (13) when viewed in the normal direction.

Inventors

  • Gong Yuanchong

Assignees

  • 京瓷株式会社

Dates

Publication Date
20260508
Application Date
20241011
Priority Date
20231017

Claims (10)

  1. 1. A liquid ejection head, wherein, The liquid ejection head has: a common flow path extending along an ejection face provided with a plurality of ejection holes and communicating with the plurality of ejection holes; A wide flow path connected to the common flow path and having a width wider than that of the common flow path when viewed in a normal direction of the discharge surface, and And a first damper chamber facing the wide flow path from a first side in the normal direction, the first damper chamber having a width smaller than a width of the wide flow path when viewed in the normal direction.
  2. 2. The liquid ejection head according to claim 1, wherein, The first side is a side of the ejection face that is located with respect to the common flow path and the wide flow path.
  3. 3. The liquid ejection head according to claim 1 or 2, wherein, The liquid ejection head further has a second damper chamber opposed to the common flow path from the first side, The first damping chamber is not connected with the second damping chamber.
  4. 4. The liquid ejection head according to any one of claims 1 to 3, wherein, The liquid ejection head has: a second damper chamber facing the common flow path from the first side, and A plurality of plates laminated in the normal direction, The common flow path, the wide flow path, the first damper chamber, and the second damper chamber are formed by cavities formed in the plurality of plates, The plate separating the wide flow path from the first damper chamber and the plate separating the common flow path from the second damper chamber are different from each other.
  5. 5. The liquid ejection head according to claim 2 or claim 3 or 4 when directly or indirectly dependent on claim 2, wherein, The liquid ejection head further has a second damper chamber opposed to the common flow path from the first side, The thickness from the first damping chamber to the ejection face is thicker than the thickness from the second damping chamber to the ejection face.
  6. 6. The liquid ejection head according to claim 2 or claim 3 or 4 when directly or indirectly dependent on claim 2, wherein, The thickness from the first damper chamber to the ejection face is thicker than the thickness from the common flow path to the ejection face.
  7. 7. The liquid ejection head according to any one of claims 1 to 6, wherein, The first side surface of the common flow path is located closer to the first side than the first side surface of the wide flow path.
  8. 8. The liquid ejection head according to any one of claims 1 to 7, wherein, The ratio W2/W1 of the width W2 of the first damper chamber to the width W1 of the wide flow path is 0.5 to 0.9.
  9. 9. A recording apparatus, wherein, The recording device includes: the liquid ejection head according to any one of claims 1 to 8, and And a moving section that relatively moves the liquid ejection head and a recording medium that is placed opposite the ejection face along the ejection face.
  10. 10. A recording apparatus, wherein, The recording device includes: The liquid ejection head as set forth in claim 2, and A wiper that wipes the ejection face, The wiper is in contact with both a region of the ejection face where a part of the plurality of ejection holes are located and a region overlapping the first damper chamber when viewed in the normal direction.

Description

Liquid ejection head and recording apparatus Technical Field The present disclosure relates to a liquid ejection head such as an inkjet head and a recording apparatus having the liquid ejection head. Background A liquid ejection head (e.g., an inkjet head) that ejects liquid (e.g., ink) toward a recording medium (e.g., paper) is known (see, for example, patent document 1 below). Such a head has, for example, a plurality of discharge holes for discharging liquid and a common flow path communicating with the plurality of discharge holes. The common flow path contributes to, for example, supplying liquid to the plurality of ejection holes. Patent document 1 discloses a damper chamber for absorbing pressure fluctuation in a common flow path. The damper chamber is placed opposite to the common flow path through a plate and filled with a gas (e.g., air). Patent document 1 discloses a damper chamber having a width equal to the width of the common flow path. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2014-156083 Disclosure of Invention The liquid ejection head of one aspect of the present disclosure has a common flow path, a wide flow path, and a first damper chamber. The common flow path extends along an ejection face provided with a plurality of ejection holes and communicates with the plurality of ejection holes. The wide flow path is connected to the common flow path and has a width wider than a width of the common flow path when viewed in a normal direction of the discharge surface. The first damper chamber is disposed opposite to the wide flow path from a first side in the normal direction, and has a width smaller than a width of the wide flow path when viewed in the normal direction. The recording device according to one aspect of the present disclosure includes the liquid ejection head described above, and a moving unit that relatively moves the liquid ejection head and a recording medium facing the ejection face along the ejection face. A recording apparatus of one aspect of the present disclosure has the above-described liquid ejection head and a wiper that wipes the ejection face. The wiper is in contact with both a region of the ejection face where a part of the plurality of ejection holes are located and a region overlapping the first damper chamber when viewed in the normal direction. Drawings Fig. 1 is a schematic perspective view of a recording apparatus according to an embodiment. Fig. 2 is a top view of a head main body of the liquid ejection head of the recording apparatus of fig. 1. Fig. 3 is a top perspective view showing an enlarged view of a region III of fig. 2. Fig. 4 is a cross-sectional view taken along line IV-IV of fig. 3. Fig. 5 is a perspective view showing a part of the head main body of fig. 2. Fig. 6 is an enlarged view of region VI of fig. 5. Fig. 7 is a cross-sectional view taken along line VII-VII of fig. 2. Fig. 8 is a perspective view showing the first damper chamber. Fig. 9 is a cross-sectional view showing a part of a head main body of another example. Detailed Description Embodiments of the present disclosure will be described below with reference to the drawings. The drawings used in the following description are schematic drawings. Therefore, for example, the dimensional ratio and the like on the drawings do not necessarily coincide with reality. In addition, there are cases where the dimensional ratios and the like are not uniform among the drawings. Certain shapes and/or dimensions, etc., may be exaggerated or details omitted from some cases. The foregoing does not negate the actual shape and/or size of the features of the shape and/or size as in the drawings, or extracts the shape and/or size from the drawings. In the drawings, for convenience, the orthogonal coordinate system D1D2D3 is denoted by terms such as D1 direction, D2 direction, and D3 direction. As will be understood from the description below, the term in the D1 direction may be replaced with a term in a direction orthogonal to the longitudinal direction of the head and/or the direction of relative movement of the head and the recording medium. The term in the D2 direction may be replaced with a term in the short side direction of the head and/or the direction of the relative movement. The term in the D3 direction may be replaced with a term in the normal direction of the ejection face. The liquid ejection head and the recording apparatus of the embodiment may be used in any orientation. However, for convenience, a term assuming that +d3 side is an upper side is sometimes used. In the description of the embodiment, when two or more flow paths are "connected" to each other, the two or more flow paths may be directly connected or indirectly connected unless otherwise specified, and unless contradiction or the like arises. The terms "connected" and "connected" are the same. (Summary of the embodiments) Fig. 1 is a perspective view schematically showing a