CN-116619902-B - Printing device

Abstract

The present invention relates to a printing apparatus which suppresses adhesion of mist to a driving circuit. A printing apparatus is provided with a liquid ejecting head for ejecting a printing liquid to form an image on a medium, a circuit board provided with a driving circuit for driving the liquid ejecting head, and a storage mechanism for storing a cooling liquid in a liquid storage space in which all of the driving circuit and a circuit arrangement portion in which the driving circuit is provided in the circuit board are immersed in the cooling liquid.

Inventors

• KONO DAI

Assignees

• 精工爱普生株式会社

Dates

Publication Date

20260505

Application Date

20230215

Priority Date

20220218

Claims (6)

1. 1.A printing device is characterized in that, The printing device is provided with: a liquid ejecting head ejecting a printing liquid to form an image on a medium; a circuit substrate provided with a drive circuit for driving the liquid ejection head, and A storage mechanism for storing the cooling liquid in the liquid storage space, The storage mechanism stores the cooling liquid as follows: in the liquid storage space, the entirety of the drive circuit and a circuit arrangement portion of the circuit substrate in which the drive circuit is disposed are immersed in the cooling liquid.
2. 2. A printing device as claimed in claim 1, wherein, The drive circuit includes a power supply circuit that supplies power to the liquid ejection head.
3. 3. A printing device as claimed in claim 1, wherein, The drive circuit includes a drive signal generation circuit that generates a drive signal that drives the liquid ejection head.
4. 4. A printing device as claimed in claim 1, wherein, The storage mechanism has a metal wall portion for storing the cooling liquid.
5. 5. A printing device as claimed in claim 1, wherein, The storage mechanism has a radiator that releases heat in the liquid storage space to the outside of the liquid storage space.
6. 6. Printing device according to any of claims 1 to 5, wherein, The cooling liquid is a liquid having a viscosity equal to or higher than a predetermined viscosity.

Description

Printing device Technical Field The present invention relates to a printing apparatus. Background In a printing apparatus that ejects printing liquid such as ink from a liquid ejecting head by driving the liquid ejecting head and forms an image on a medium, there is a possibility that a problem may occur in a driving circuit for driving the liquid ejecting head due to heat generated in the driving circuit. In addition, when dust adheres to the drive circuit, there is a possibility that a defect may occur in the drive circuit. In patent document 1, in order to suppress the occurrence of such a problem, a technology relating to a printing apparatus including a housing for cooling a driving circuit, that is, a housing for suppressing adhesion of dust to the driving circuit has been proposed. Patent document 1 Japanese patent laid-open No. H06-112678 However, in the technique described in patent document 1, when the printing liquid discharged from the liquid ejecting head turns into mist and floats in the interior of the printing apparatus, the adhesion of the mist to the driving circuit cannot be suppressed. Accordingly, with ejection of the printing liquid, there is a possibility that the generated mist adheres to the driving circuit, and thus a problem may occur in the driving circuit. Disclosure of Invention In order to solve the above problems, a printing apparatus according to the present invention includes a liquid ejecting head that ejects a printing liquid to form an image on a medium, a circuit board provided with a driving circuit that drives the liquid ejecting head, and a storage mechanism that stores a cooling liquid in a liquid storage space in such a manner that all of the driving circuit and a circuit arrangement portion of the circuit board in which the driving circuit is provided are immersed in the cooling liquid. Drawings Fig. 1 is a block diagram showing an example of the structure of an inkjet printer 1 according to an embodiment of the present invention. Fig. 2 is a perspective view showing an example of a schematic internal structure of the inkjet printer 1. FIG. 3 is a cross-sectional view for explaining an example of the structure of the ejection portion D [ m ]. Fig. 4 is a block diagram showing an example of the structure of the head unit 3. Fig. 5 is a timing chart for explaining an example of signals supplied to the head unit 3. Fig. 6 is an explanatory diagram for explaining an example of the individual specification signal Sd [ m ]. Fig. 7 is a block diagram showing an example of the configuration of the drive signal generation unit 4. Fig. 8 is a plan view for explaining an example of the configuration of the driving unit 6 and the storage unit 600. Fig. 9 is a sectional view for explaining an example of the structure of the driving unit 6 and the housing unit 600. Description of the reference numerals 1 An inkjet printer, 2 a control unit, 3a head unit, 4a drive signal generation unit, 5a power supply unit, 6a drive unit, 7a transport unit, 31 a supply circuit, 32 a recording head, 40 an integrated circuit, 42 a smoothing circuit, 60 a circuit substrate, 61 a cap, 62 a heat sink, 600 a storage unit, trH a transistor, trL a transistor. Detailed Description Hereinafter, modes for carrying out the present invention will be described with reference to the drawings. However, in each drawing, the dimensions and scales of each part are appropriately different from the actual dimensions and scales. The embodiments described below are preferred specific examples of the present invention, and therefore, various limitations that are technically preferred are imposed, but the scope of the present invention is not limited to these embodiments unless the description of the present invention is particularly limited in the following description. A. Description of the embodiments In this embodiment, a printing apparatus will be described by taking an example of an inkjet printer that ejects ink to form an image on recording paper PP. 1. Outline of inkjet Printer An example of the structure of the inkjet printer 1 according to the present embodiment will be described below with reference to fig. 1 to 3. Fig. 1 is a functional block diagram showing an example of the structure of an inkjet printer 1. As shown in fig. 1, print data Img indicating an image to be formed by the inkjet printer 1 is supplied from a host such as a personal computer or a digital camera to the inkjet printer 1. The inkjet printer 1 performs a printing process of forming an image represented by the print data Img supplied from the host computer on the recording paper PP. The ink jet printer 1 includes a control unit 2 for controlling each part of the ink jet printer 1, a head unit 3 provided with an ejection part D for ejecting ink, a drive signal generation unit 4 for generating a drive signal Com for driving the ejection part D, a power supply unit 5 for supplying power to the head unit 3 and the drive signal generation