HEAD CHIP, LIQUID JET HEAD, LIQUID JET RECORDING APPARATUS, AND METHOD OF MANUFACTURING HEAD CHIP

Abstract

To provide a head chip that can secure allowances for positional displacement between a nozzle hole and a communication hole, while securing junction areas between an actuator plate and an intermediate plate, a liquid jet head, a liquid jet recording device and a head chip manufacturing method.SOLUTION: A head chip according to one embodiment described in the present disclosure comprises an actuator plate, a nozzle plate arranged opposing to the actuator plate, and an intermediate plate provided between the actuator plate and the nozzle plate. A communication hole comprises a groove part having a lower opening part that opens toward a nozzle hole and a through-hole part having an upper opening part that opens toward a discharge channel. A dimension in an X-direction in the upper opening part is larger than a dimension in the X-direction in the lower opening part, and the dimension in the X-direction in the upper opening part is below a dimension in the X-direction of a channel opening part that opens on a channel opening surface of the discharge channel.SELECTED DRAWING: Figure 8

Claims

1. an actuator plate in which a plurality of ejection channels extending in a first direction are arranged in a second direction intersecting the first direction; an injection hole plate having a plurality of injection holes for ejecting liquid and provided to face a channel opening surface of the actuator plate where the injection channel opens; an intermediate plate having communication holes that respectively connect the injection channel and the injection hole, the intermediate plate being provided between the actuator plate and the injection hole plate; The communication hole is a groove portion having a first opening portion that opens toward the injection hole and recessed in a direction away from the injection hole plate; a through-portion penetrating the intermediate plate by having a second opening portion opening toward the injection channel and communicating with the groove portion at least in a region including the groove portion; a dimension of the first opening in the second direction is larger than a dimension of the second opening in the second direction; A head chip in which the dimension in the second direction of the second opening is equal to or smaller than the dimension in the second direction of a channel opening of the ejection channel that opens on the channel opening surface.

2. When a direction intersecting the second direction as viewed from the thickness direction of the intermediate plate is defined as a third direction, The head chip according to claim 1 , wherein a dimension of the through portion in the third direction is smaller than a dimension of the channel opening in the third direction.

3. the channel opening surface faces a thickness direction of the actuator plate, The head chip according to claim 1 , wherein the through portion protrudes from the groove portion on both sides in the first direction.

4. the channel opening surface faces a thickness direction of the actuator plate, The head chip according to claim 1 , wherein the through portion protrudes to one side in the first direction with respect to the groove portion.

5. 5. A head chip according to claim 1, wherein in the thickness direction of the intermediate plate, a dimension from the first opening to a bottom surface of the groove is greater than a dimension from the bottom surface of the groove to the second opening.

6. The head chip according to claim 1 , wherein a bulge that bulges out from the bottom surface is formed in a portion of the bottom surface of the groove that is located closer to the through portion in the second direction.

7. A liquid-jet head comprising the head chip according to any one of claims 1 to 6.

8. A liquid jet recording apparatus comprising the liquid jet head according to claim 7.

9. an actuator plate in which a plurality of ejection channels extending in a first direction are arranged in a second direction intersecting the first direction; an injection hole plate having a plurality of injection holes for ejecting liquid and provided to face a channel opening surface of the actuator plate where the injection channel opens; an intermediate plate having communication holes that respectively connect the ejection channels and the ejection holes, the intermediate plate being provided between the actuator plate and the ejection hole plate, a communication hole forming step of forming the communication hole in the intermediate plate; an injection hole plate lamination step of laminating the injection hole plate on the intermediate plate, The communication hole forming step includes: a groove forming step of forming a groove in the intermediate plate by recessing the intermediate plate in a direction away from the injection hole plate, the groove having a first opening that opens toward the injection hole; a through-portion forming step of forming a through-portion in the intermediate plate by penetrating the intermediate plate at least in a region including the groove portion, the through-portion having a second opening portion opening toward the ejection channel, In the groove forming step, a dimension of the first opening in the second direction is set to be larger than a dimension of the second opening in the second direction; In the through-portion forming step, a dimension of the second opening in the second direction is set to be equal to or smaller than a dimension of a channel opening of the ejection channel that opens on the channel opening surface in the second direction; The ejection hole plate lamination step is a manufacturing method of a head chip, comprising laminating the ejection hole plate on the intermediate plate so that the first opening and the ejection hole communicate with each other.

10. an intermediate plate lamination step of laminating the intermediate plate on the channel opening surface of the actuator plate; The method for manufacturing a head chip according to claim 9 , wherein the groove forming step is performed before the intermediate plate laminating step.

11. an intermediate plate lamination step of laminating the intermediate plate on the channel opening surface of the actuator plate; The method for manufacturing a head chip according to claim 9 , wherein the groove forming step and the through-hole forming step are performed after the intermediate plate laminating step.

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