JPS5863458A - Recording head - Google Patents

Abstract

PURPOSE:To facilitate the maintenance management with easy, and perform independent replacement of component parts by arranging an ink jet head having a plurality of ink discharge ports, a drive control section and a wire section intrinsic thereto so as to be independent to each other. CONSTITUTION:An ink jet head section 201 having a plurality of orifices 102 aligned, a drive control section 204, a wire section 205, a flexible printed board 210 and a multilayer interconnection board 208 as main parts are assembled together on a common substrate 202 to construct a recording head unit 101. Thus, these parts can be replaced with new ones easily wherever necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inkjet recording head, and particularly to a recording head equipped with an inkjet system generally referred to as a line multi-array type.

Among the various recording methods currently known, the non-impact recording method generates almost no noise during recording, is capable of high-speed recording, and can record on plain paper without requiring any special fixing process. The fragmented inkjet recording method that can be used is an extremely useful method for realizing printing devices such as various printers and word processor copying machines.

This inkjet recording method uses small droplets of recording liquid (referred to as ink in the following explanation).
In this method, recording is performed by making a recording material (let) fly using various operating principles and attaching it to a recording material such as paper. An ink droplet generating device used in such an inkjet recording system, that is, an inkjet device, mainly consists of an inkjet head section for forming ink droplets and an ink supply system for supplying the ink to the inkjet head section.

By the way, the first form of the inkjet head section is generally called a single type or a semi-multiple type, which has about 1 to 10 ink ejection ports. These heads have a relatively simple structure, and even if they break down or are damaged, they can be easily replaced, and the cost does not increase significantly.

However, if a different type of head, generally called a full-line multi-array type, is used to print one digit of paper almost simultaneously, there is a high probability that part of the head will malfunction or be damaged. Despite the increase in the number of heads, replacing the head is not easy. Moreover, there are cost constraints in replacing the entire head.

The present invention provides a recording head suitable for constructing a stable and highly reliable full-line multi-array type inkjet system that solves these problems.

Furthermore, in one aspect of the present invention, parts replacement work is easy, and furthermore,
Another object of the present invention is to provide a placement head equipped with a line multi-array type inkjet system that allows easy maintenance and management of the entire device.

Hereinafter, the present invention will be described in detail based on examples using drawings.

FIG. 1 is an external perspective view of an inkjet recording apparatus configured with the recording head of the present invention as described below. 1, 101 is a recording head unit F, and this recording head unit 101 is composed of an inkjet head section 106 having a plurality of orifices 102 arranged in a line, a drive control section 104, and a wiring section 105. and
The head unit 106, the drive control unit 104, and the wiring unit 105 are connected to each other by a bonded ink wire, a flexible printed board, etc. (not shown), and by inputting a recording signal to the wiring unit 105, the head units (101) perform printing operations individually. It is set up so that it is possible. 106 is the above-
This is a support plate for the head unit 101, and a plurality of the head units 101 are arranged side by side on both the front and back sides as shown in the figure, and an orifice 102 is cut in the width of a predetermined printing paper (...that is, - digits). , □ to make a full line arrangement. Each head unit 101 has a support plate 106.
The fixing position in the left and right direction is adjusted by a head positioning plate 107 attached to the head, and the fixing position in the vertical direction is adjusted by a head holding plate 108, so that the head is detachably attached to the support plate 106.

109 is a matrix flexible printed board for transmitting an output signal from a signal output section (not shown) to the wiring section 105 of each head unit 101 via a cable 110 and a connector 111; Separate wiring section 10 for each spatula and do unit 101
5 and is electrically connected to each wiring section 105. In this way, the printed board 109 and each wiring section 105 are not bonded to each other and can be freely attached and detached.

Reference numeral 113 denotes a lead terminal mounting plate, which is connected to another signal line 1 from a signal output section (not shown) for driving the head unit 101.
14 and each head unit) 101, a signal line (not shown) that is directly connected to the head portion 103 of the head unit 101 is removably connected by screwing or the like.

115 and 115/ are both supply pipes for supplying ink from the ink tank 116 to each head section 106. Ink supply pipe 115. Two supply pipes 115' are connected to each head unit 105, and when ink is ejected, two supply pipes 115. Ink is supplied to the head portion 1o3 through the ink tank 115', and a valve mechanism (not shown) provided in the ink tank 116 allows one side to be used for pressurized feeding and the other for ink recovery, so that the ink tank 116 and the head are connected to each other. The ink tank 116, which is also capable of pressurized circulation of ink between the ink tank 106 and the cylinder block 117, has a cylinder block 117 containing a pressurizing pump for operating the valve mechanism, and an air filter having a ventilation hole. A block 118 is attached to the air filter block 118, and a removable cap 119 is attached to the air filter block 118 to prevent ink from scattering during transportation.

Further, the ink tank 116 is provided with an ink replenishment port (not shown), through which ink is replenished from the replenishment tank 120 so that the ink level in the ink tank 116 is kept approximately constant. . This replenishment tank 120 has a fixing claw 121 provided on the side of the ink tank 116. 12
1' is detachably locked to the ink tank 116, making it possible to replace the old and new tanks as necessary.

The ink tank 116 is fixed on an ink tank base (not shown), and is also fixed to the support plate 106 with fixing fittings 122 and 122'.

Reference numeral 126 denotes a head unit 1010 cover provided with a groove for fixing the ink supply pipes 115 and 115', and this cover 123 prevents the head unit 101 from being contaminated by ink or being damaged by impact during handling. It is for.

Reference numerals 124 and 124' indicate positioning pins that fit into a bin holder attached to a paper conveyance system (not shown) to maintain a predetermined distance and positional relationship between the orifice 102 of each head 106 and the recording paper. It is now set. or,
Positioning bins 124 and 124' are secured to support plate 106 by respective brackets 125, 125'.

Reference numeral 126 denotes a board for mounting the illustrated inkjet recording apparatus on an unillustrated device main body with the support plate 106 placed thereon. Drive mechanism and orifice 1
02 capping mechanism etc. are attached.

Further, the support plate 106 has its front part connected to the support plate guide 1221.
27I, and the hinge holder 129. 129'. This hinge holder 129. 129' are guide/shaft collars 130. 1! Two guide shafts 1 via +07
31, 151'. The guide shaft 131 is set on the guide shaft bracket 1 on the board 126.
52 (the guide shaft 131' side is not shown) K.

Here, the guide shaft collar 130. By advancing or retracting 130' along the respective guide shafts 131, 131', the support plate 106 also moves the guides 127, 127'.
By sliding on the top and moving in the direction of the arrow in the figure, the front end surface of the head can be set at a predetermined position such as a recording position, a capping position, a maintenance position, etc.

163 is a head for capping and cleaning the orifice 102, and the trowel surface facing the orifice has an ejection hole for ejecting air or cleaning liquid toward the orifice, and a suction hole for suctioning the orifice. (not shown).

The ejection hole and the suction hole are located at locations (not shown) in the pressure side tube 134, 134' and the suction side tube 135, 135', respectively.
, and also communicates with joints 156 and 167, with the pressure side joint 136 communicating with it via a reverberator (not shown), and the suction side joint 167 communicating with it via a filter (not shown), respectively. Not connected to the pressure side and suction side of the pump. The cleaner rod 1 and filter 3, which also serves as a cap, are also set so that they can assume a recording position, a capping position, and a maintenance position in response to the movement of the support plate 106.

In addition, the support plate 106 has hinge pins 138 and 1381 attached to the hinge stands 128 and 128' as support shafts, so that the side surface of the orifice 102 of the support plate 106 draws an arc! This support plate 106 can be rotated to
By crimping the stay 141, one end of which is pivoted to the stay angle 140 fixed to the support plate 106, with a screw 142 to the stay angle 140 connected to the support plate 106, It can be fixed at an angle of

Furthermore, by removing the fixing screws 142 from the stay angle 169, the support plate 106 can be easily removed from the base plate 126.

Incidentally, 146 is tube 134J 154'i 155
．． 155' is a tube guide for fixing on the board 126, and 14''4 is a cable 110.Signal line 114
This is a case of rice cakes. As a result, when the illustrated inkjet recording device is attached to the unillustrated device main body,
Cable 110 and signal #! 114 can be prevented from being damaged or cut due to external pressure being applied unexpectedly.

Next, the recording head unit 101 shown in FIG. 1 will be explained in detail using FIG. 2.

In FIG. 2, 202 is a head unit board;
An inkjet head section 201 is fixedly installed on one of the short sides, and a wiring section support stand 206 is placed on the surface of the substrate 202 in the rear end side region of this head section 201. The stiffness support stand 206 is fixed to the board 202 by screws 211.
The support stand 203 and the substrate 202
There is no adhesive between them, and the support stand 203 can be slid on the substrate 202, or the two can be separated by removing the screws 211. j! A wiring board 205 and a multilayer wiring board 208 are mounted on the upper surface of this support stand 206.
are placed in series, and are connected by bonding 206.

Incidentally, 207 is a cover for the bonding portion 206, which can be removed from the wiring board 205 and the multilayer wiring board 208 as necessary. Further, the back surfaces of the wiring board 205 and the multilayer wiring board 208 are easily bonded to the support base 203 so that they can be separated if necessary.

204 is a drive control section, which is fixed on the wiring board 205 and electrically connected to it.

Reference numeral 210 denotes a flexible printed board including lead wires related to the inkjet head section 201, one end of which is crimped to the wiring board 2[)5K by a holding jig 209 to establish an electrical connection between the two. Then, by loosening the setscrews 2D9b of the upper plate 209m of the holding jig 209, the flexible printed board 210 and the wiring board 20
5 can be separated.

As indicated by the rivet, the recording head unit 101 includes a head section 201.7 which is configured separately in advance, and a flexible printed board 2.
10, wiring board 205, drive control section 204, multilayer wiring board 2
The main parts consisting of 08 are assembled on a common board 202, and each part can be easily replaced if necessary.

In addition, in the main text of the tack, the inkjet head, which is the main part of the blow-up head in the recording head of the present invention, as explained above, such as the ink supply system related to the inkjet head section and the drive system of the head, The drive control section and wiring section of this device are constructed independently and can be easily replaced.

Therefore, at the time of assembling the recording head unit, the performance of each component should be carefully examined to make it possible to assemble only those with good performance. Furthermore, even when replacement is required due to damage, etc., as mentioned above, only the relevant parts need to be replaced, making maintenance work extremely efficient and economical.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of an inkjet recording apparatus configured with the recording head of the present invention, and FIG. 2 is an external perspective view illustrating the detailed configuration of the recording head of the present invention. In the figure, 101 is a recording head unit, 102 is an ink ejection orifice, 103. 201 is an inkjet head section; 104. 204 is a drive control unit, 105
106 is a wiring part, 106 is a support plate, 107 is a head positioning plate, 108 is a head holding plate, 109.210 is a printed board, 110 is a cable, 111 is a connector, 112 is a pressing jig, 116 is a lead terminal mounting plate, 114 is the signal line,
115. 115' is an ink supply pipe, 202 is a 'substrate,
203 is a support stand, 205 is a wiring board, 206 is a bonding board 208 is a multilayer wiring board, and 209 is a holding jig. Patent applicant Canon Co., Ltd.

Claims (1)

[Claims] A recording head comprising an inkjet head section having a plurality of ink ejection ports, and a drive control section and a wiring section that are unique to this head section and are connected to each other.