JP-7855385-B2 - Liquid discharge head and liquid discharge device

JP7855385B2JP 7855385 B2JP7855385 B2JP 7855385B2JP-7855385-B2

Inventors

辻智貴
安間弘雅
奥島真吾
岩野卓也

Assignees

キヤノン株式会社

Dates

Publication Date: 20260508
Application Date: 20220330

Claims (8)

A dispensing module that dispenses liquid in the direction of discharge, A support member that supports the aforementioned discharge module, The system comprises a liquid supply unit connected to the discharge module by a connecting channel and supplying liquid to the discharge module, The support member is a liquid dispensing head that adheres and supports the dispensing module on the dispensing direction side of the support member, The liquid supply unit is positioned relative to the support member, With the discharge module and the liquid supply unit connected by the connecting channel, the connecting channel is provided to be movable relative to the liquid supply unit. The liquid discharge head is characterized in that the connecting channel comprises a first channel member and a second channel member, and an elastic member is provided between the first channel member and the second channel member.
The liquid dispensing head according to claim 1, characterized in that at least two or more of the dispensing modules are supported by the support member.
The liquid discharge head according to claim 1 or 2, characterized in that the connecting channel is connected to the liquid supply unit by a portion of it being inserted into a recess provided in the liquid supply unit.
The aforementioned connecting channel and the liquid supply unit are connected via a sealing member. The liquid discharge head according to claim 3, characterized in that the sealing member is in pressure contact with the connecting channel and the recess in the radial direction with respect to the discharge direction as the axis.
The aforementioned discharge module has an element substrate equipped with an element that generates discharge energy used when discharging liquid, The liquid discharge head according to any one of claims 1 to 4 , characterized in that the connecting channel comprises a first channel through which the liquid to be discharged flows and a second channel through which the refrigerant flows.
The liquid dispensing head according to any one of claims 1 to 5 , characterized in that the liquid supply unit is positioned with respect to the support member via an electrical wiring board support member.
The liquid discharge head according to claim 1, characterized in that the connecting channel and the liquid supply unit are connected via a tube.
A liquid dispensing device configured to be able to mount the liquid dispensing head described in any one of claims 1 to 7 .

Description

This invention relates to a liquid dispensing head and a liquid dispensing device. Patent Document 1 discloses a liquid ejection head in which a liquid channel is provided in the support member. However, when the liquid becomes hot during use, such as with UV ink, heat transfer from the liquid to the support member can cause the support member to expand due to linear expansion, potentially reducing the liquid ejection accuracy. Therefore, a liquid ejection head is known in which the ejection unit is attached to a support member that does not have a liquid channel. Figure 1 schematically shows a liquid discharge head 13 in which a discharge unit 17 is attached to a support member 11 that does not have a liquid flow path. The support member 11 has a through-hole, and the discharge module 12 is attached by being inserted into this through-hole. The discharge module 12 is adhesively fixed to the adhesive surface 14, which is the surface of the support member 11 on the discharge direction (Z direction) side. The discharge unit 17 is connected to a liquid supply unit 15 by a connection part 16, and liquid is supplied from the liquid supply unit 15 to the discharge unit 17. Japanese Patent Publication No. 2015-39795 This is a schematic diagram illustrating a typical liquid dispensing head.This is a schematic perspective view showing a liquid dispensing device.This is an external perspective view showing the liquid dispensing head.This is an exploded perspective view showing the liquid dispensing head.This is an external view showing the discharge module.This is an exploded perspective view of the discharge module.This is a diagram showing the discharge module.This diagram shows the support member and the discharge module.This figure shows the state with the first flow path unit attached to the configuration shown in Figure 8(a).This figure shows the state with the second flow path unit attached to the configuration shown in Figure 9(a).This diagram shows an electrical wiring board support member and a liquid supply unit.This diagram shows a liquid supply unit connected to a dispensing unit.This diagram shows the dispensing unit and the liquid supply unit. (First embodiment) A first embodiment of the present invention will be described below with reference to the drawings. Figure 2 is a schematic perspective view showing a liquid ejection device 101 to which the liquid ejection head module 1 to which this embodiment can be applied can be mounted. The liquid ejection device 101 moves the recording medium 112 at a position facing the liquid ejection surface of the liquid ejection head module 1, ejecting liquid (hereinafter also referred to as ink) from the liquid ejection head module 1 to form an image on the recording medium 112. The liquid ejection head module 1 mounted on the liquid ejection device 101 includes liquid ejection heads 1Ca and 1Cb corresponding to cyan (C) ink, and liquid ejection heads 1Ma and 1Mb corresponding to magenta (M) ink. Furthermore, the liquid ejection head 1 includes liquid ejection heads 1Ya and 1Yb corresponding to yellow ink, and liquid ejection heads 1Ka and 1Kb corresponding to black (K) ink. The liquid ejection head module 1 has multiple ejection ports arranged along the X direction, corresponding to the width of the recording medium 112. The recording medium 112 is transported in the A direction by the transport unit 110, and recording is performed by the liquid ejection head module 1. Since the liquid ejection heads 1Ca, 1Cb, 1Ma, 1Mb, 1Ya, 1Yb, 1Ka, and 1Kb all have the same configuration, they will be described below as liquid ejection head 3 without being distinguished by color. Figures 3(a) and 3(b) are external perspective views showing the liquid discharge head 3 to which this embodiment can be applied. Figure 3(a) shows the liquid connection portion 111, and Figure 3(b) shows the state of Figure 3(a) rotated around the X-axis to show the recording element substrate 10. The liquid discharge head 3 has four recording element substrates 10 capable of discharging liquid arranged in a staggered pattern. Each recording element substrate 10 is electrically connected to a signal input terminal 91 and a power supply terminal 92 via a flexible wiring board and an electrical wiring board, which will be described later. The signal input terminal 91 and power supply terminal 92 are electrically connected to the control unit of the liquid dispensing device 101, supplying the dispensing drive signal and the power required for dispensing, respectively, to the recording element board 10. By consolidating the wiring using electrical circuits within the electrical wiring board, the number of signal output terminals 91 and power supply terminals 92 can be reduced compared to the number of terminals on the recording element board 10. This reduces the number of electrical connections that need to be removed when assembling the liquid dispensing head 3 to the liquid dispensing device 101 or when