JPH0354056B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inkjet device that records on a recording medium by discharging ink from a discharge port.

Among the various recording methods currently known, the non-ink pact recording method generates almost no noise during recording, is capable of high-speed recording, and does not require special fixing treatment on plain paper. The so-called inkjet recording method, which can perform recording on images, is an extremely useful method for realizing printing devices such as various printers, word processors, and copying machines.

In this inkjet recording method, small droplets of recording liquid (referred to as ink in the following explanation) are ejected using various principles of operation.
Recording is performed by 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, in an inkjet device using the above-mentioned inkjet recording method, a method is known in which a terminal and a lead wire are connected by uniformly pressing and fixing them using a pressure means such as a screw.
However, in the above method, if there is variation in the thickness of the terminal and the lead wire, an excessive load is applied to the thicker portion than other portions, which may cause a connection failure.

SUMMARY OF THE INVENTION The present invention solves the above problems and provides an inkjet device that can connect terminals and lead wires with good precision.

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

In the embodiments described below, an inkjet system using a full-line multi-array type head used for printing one line of paper substantially simultaneously will be described as an example. Further, in the embodiment described below, a plurality of structural units each having an inkjet head section and its own drive control section and wiring section are separated and arranged in parallel, and each unit has its own wiring section and these units. It is connected by pressure contact with a common signal transmission lead.

FIG. 1 is an external perspective view of an inkjet device to which an embodiment of the present invention is applied. In FIG. 1, 101 is a recording head unit, and this recording head unit 101 includes an inkjet head section 103 having a plurality of orifices 102 arranged in a line, a drive control section 104, and a wiring section 1.
The head unit 103, drive control unit 104, and wiring unit 105 are connected to each other by bonding wires, flexible printed boards, etc. (not shown), and by inputting a recording signal to the wiring unit 105, the head unit 101 can be individually configured. It is set so that printing is possible. Reference numeral 106 denotes a support plate for the head unit 101, and a plurality of the head units 101 are arranged side by side on both sides of the plate as shown in the figure, and the orifice 102 is arranged in a so-called full line across the width of a predetermined printing paper (that is, one line). They are arranged in such a way that they are arranged. The fixing position of each head unit 101 in the horizontal direction is adjusted by a head positioning plate 107 attached to the support plate 106, and the fixing position in the vertical direction is adjusted by a head holding plate 108, so that it can be attached to and removed from the support plate 106. They are arranged freely.

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; , are pressed into contact with individual wiring portions 105 of each head unit 101 and are electrically connected to each wiring portion 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.

113 is a lead terminal mounting plate for head unit 1.
Another signal line 114 from a signal output section (not shown) for driving the head unit 101 and a signal line (not shown) directly connected to the head section 103 of each head unit 101 are removably connected by screws or the like. has been done.

115 and 115' are both ink tanks 11
This is an ink supply pipe for supplying ink from 6 to each head section 103.

Ink supply pipes 115 and 115' are connected to each head section 1.
When ink is ejected, ink is supplied to the head section 103 through the two supply pipes 115 and 115'.
A valve mechanism (not shown) provided in the ink tank 116 allows ink to be circulated under pressure between the ink tank 116 and the head section 103, with one side used for pressurized feeding and the other used for ink recovery. It's getting old.

The ink tank 116 includes a cylinder block 117 containing a pressure 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 detachable 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 the ink tank 1
Ink is replenished from the replenishment tank 120 so that the ink level within the replenishment tank 120 is maintained approximately constant. This replenishment tank 120 is the ink tank 1
The ink tank 116 is removably locked to the ink tank 116 by fixing claws 121, 121' provided on the 16 side, 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 the ink tank 116 is fixed on an ink tank base (not shown).
2' is also fixed to the support plate 106.

Reference numeral 123 designates a cover for the head unit 101, which is provided with grooves for fixing the ink supply tubes 115, 115'. It is something.

Reference numerals 124 and 124' indicate positioning pins, which are fitted into pin holders attached to a paper conveyance system (not shown) to maintain a predetermined distance and positional relationship between the orifice 102 of each head section 103 and the recording paper. It is now set. Also, the positioning pin 124
and 124' are the respective brackets 125 and 12
5' is fixed to the support plate 106.

Reference numeral 126 denotes a board for mounting the illustrated inkjet recording apparatus on the main body of the device (not shown) with the support plate 106 placed thereon. A mechanism, a capping mechanism for the orifice 102, etc. are attached.

Further, the support plate 106 has its front part supported by support plate guides 127, 127', and its rear part supported by hinge stands 128, 12 attached to the support plate 106.
8' and supported by hinge holders 129, 129'. This hinge holder 12
9 and 129' are guide shaft collars 130 and 129', respectively.
Two guide shafts 131, 13 via 130'
1'. The guide shaft 131 is attached to the guide shaft bracket 13 on the board 126.
2 (the guide shaft 131' side is not shown).

By moving the guide shaft collars 130, 130' forward or backward along the respective guide shafts 131, 131', the support plate 106 also slides on the guides 127, 127' 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.

133 is a head for capping and cleaning the orifice 102, and the side facing the orifice has an ejection hole for ejecting air and cleaning liquid toward the orifice, and a suction hole for suctioning the head (both are (not shown). The ejection hole and the suction hole are connected to pressure side tubes 134, 134' and suction side tubes 135, 135', respectively, at locations not shown, and are connected to joints 136 and 135', respectively.
37, the pressure side joint 136 is connected to the joints through a relubricator (not shown), and the suction side joint 137 is connected to the joints through a filter (not shown).
It is connected to the pressure side and suction side of a pump (not shown). The cleaner head 133, which also serves as a cap, is also set so that it can assume a recording position, a capping position, and a maintenance position in response to the movement of the support plate 106.

The support plate 106 also has hinge bases 128 and 12
Hinge pins 138 and 13 attached to 8'
Orifice 10 of support plate 106 with 8' as the pivot
The two sides can rotate in an arc,
This support plate 106 is constructed by crimping a stay 141, one end of which is pivotally attached to a stay angle 140 fixed to the substrate 126, to a stay angle 139 joined to the support plate 106 with a screw 142, so that the surface of the substrate 126 is fixed. It can be fixed at a desired angle.

Furthermore, attach the fixing screw 142 to the stay angle 139.
By removing the support plate 106 from the substrate 12
It can also be easily removed from 6.

Incidentally, 143 is tube 134, 134', 1
35, 135' on the board 126, and 144 is a tube guide for fixing the cable 11
0, a protective case for the signal line 114. This prevents the cable 110 and the signal line 114 from being damaged or cut due to unexpected application of external pressure when the illustrated inkjet recording device is installed in a device body (not illustrated).

Next, the recording head unit 101 shown in FIG. 1 will be explained in detail with reference to FIG.

In FIG. 2, 202 is a head unit board, on one of its short sides, an inkjet head part 201 is fixedly installed, and in the rear end area of this head part 201, a wiring part support stand 203 is mounted on the board. 202
placed on the surface. This support stand 203 is the substrate 2
02, but the support stand 203 and the substrate 202 are not bonded, and the support stand 203 can be slid on the substrate 202, or The two can also be separated by removing the screws 211. Furthermore, a wiring board 205 and a multilayer wiring board 208 are placed in series on the upper surface of this support stand 203, and the two are connected by bonding 206. Incidentally, 2
Reference numeral 07 denotes a cover of the bonding section 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 provided with a support stand 20.
3 and can be easily glued together and separated if necessary.

204 is a drive control unit, which is connected to the wiring board 20
5, and an electrical connection is made.

210 is a flexible printed board including lead wires related to the inkjet head section 201;
One end of the wiring board 2 is held by a holding jig 209.
05 to establish an electrical connection between the two. Then, the upper plate 209a of the presser jig 209
By loosening the setscrews 209b, the flexible printed board 210 and the wiring board 205 can be separated.

As mentioned above, the recording head unit 101
Main parts consisting of the head part 201, flexible printed board 210, wiring board 205, drive control part 204, and multilayer wiring board 208, which have been separated in advance, are assembled on a common board 202, and if necessary, , each part is easy to replace.

FIG. 3 is a partial external perspective view of the recording apparatus of the present invention, illustrating in detail how the recording head unit 101 shown in the example shown in FIG. 1 is mounted on the support plate 106.

In FIG. 3, a head positioning plate 302 attached to a support plate 300 has a reference surface 304 for installing an orifice 303 in the left and right direction, and an orifice surface 3
An installation reference plane 306 in the front-rear direction of 05 is provided.

The reference planes 304 are provided in exactly the same direction with respect to one side end surface of the head positioning plate 302, corresponding to the number and position of the recording head units 307 disposed on the support plate 301. On the other hand, the reference plane 3 of the head portion 308 of the head unit 307
The side surface facing 04 is machined with high surface precision, and by abutting the side surface of the head section 308 against the reference surface 304, the horizontal positional deviation of the orifice 303 between each head section 308 can be avoided.
It is now possible to stop within 1/2 of the pitch of 3.

Further, the reference plane 306 in the front and back direction of the orifice surface 305 in the head positioning plate 302 is the support plate 3.
This is common to all of the head units 308 disposed on the head unit 01, and by aligning the orifice surface 305 of each head unit 307 with the reference plane 306 of the head positioning plate 302, each head unit 308 can be adjusted.
The orifice surfaces 305 of can be disposed on the same plane.

As a method for aligning each orifice surface 305 with the reference surface 306, for example, a removable flat plate is brought into contact with the reference surface 306 and each head portion 308 is brought into contact with the reference surface 306.
There is a method of butting the orifice surfaces 305 of the
06 can be matched exactly.

After each head unit 307 is arranged at a predetermined position on the support plate 301 as described above, the rear portion of the unit board 309 of each head unit 307 is fixed to the support plate 301 with a fixing claw (not shown). The unit board 309 is relatively thin, and if its flatness is not sufficient, the unit board 309 can be fixed by fixing its rear part to the support plate 301 with a fixing claw.
The front part of the head part 09, especially the vicinity of the head part 308, floats off the support plate 301. Therefore, support plate 3
Using the head unit installation surface of 01 as a reference, the head parts 308 are pressed by the head holding plates 310, 310' so that the orifices 303 of each head part 308 are arranged on the same line, and the vertical position of the head part 308 is defined. At the same time, the back surface of the unit board 309 is brought into close contact with the support plate 301 and fixed.

As mentioned above, the head holding plates 310, 310' are
In addition to defining the vertical position of the head section, for example, if the head section 308 is fixed to the unit substrate 309 by adhesive or other means, the ink oozing from the orifice 303 may dissolve the adhesive. It is also possible to prevent the head portion 308 from peeling off from the unit substrate 309 due to insufficient adhesive strength, thereby preventing the head portion 308 from becoming misaligned.

In this way, a predetermined number of head units 30
7 is placed at a predetermined position on the support plate 301, first signal lines (not shown) that are directly connected to each head portion 308 are connected to the lead terminal attachment plate 311 by screwing or the like.

Next, a second signal line 312 from a signal output section (not shown) is connected to the wiring section 315 of each head unit 307 via a connector 313 and a matrix flexible printed board 314. At this time, the matrix flexible printed board 314
On the surface facing the wiring section 315, a conductor exposed section 316 is provided at a position corresponding to the wiring section 315 of each head unit 307, and one end is connected to the connector 313.

Flexible printed board 314 and wiring section 315
In order to connect the wiring section 315 and the exposed conductor section 316, first, the wiring section 315 and the exposed conductor section 316 are aligned. The wiring section 315 and the exposed conductor section 316' are aligned in the head unit 3.
07 is a unit board 309 fixed to the support plate 301, and the wiring part support stand 317 on which the wiring part 315 is placed is a flexible printed board 318.
It is possible to move on the unit board 309 within the range of degrees of freedom, and since the widths of the conductors of the wiring portion 315 and the flexible printed board 314 are wide enough to allow visual alignment, this can be done relatively easily.

After aligning the wiring portion 315 and the exposed conductor portion 316, the crimp rod 320 is inserted through the rubber sheet 319.
Connect the flexible printed board 314 to the wiring section 315.
Crimp them sequentially.

The crimp rod 320 is rotatably locked to the crimp lever 322 via a spindle 321, and the crimp lever 322 is fixed to the support plate 301 via a spindle 323. It is rotatably locked around a support shaft 323 to a lever fixing base 324 located therein.

A crimp screw 325 is attached to the crimp lever 322, and when this crimp screw is screwed in, the crimp rod 32
0 brings the flexible printed board 314 into pressure contact with the wiring part 315 via the rubber sheet 319, and the wiring part 315 and the flexible printed board 314 are electrically connected, and at the same time, the support base 317 is fixed on the unit board 309. .

In this manner, when it becomes necessary to replace the head unit 307 fixed on the support plate 301, first loosen the crimp screw 325, remove the crimp lever 322 and crimp rod 320 from the flexible printed board 314, and then replace the unit. Board 30
Each head unit 307 can be removed from the support plate 301 by removing the head unit 9 from a fixing claw (not shown) and the head holding plates 310, 310'. After replacing the head unit 307, the replacement work for each head unit is completed by fixing it in a predetermined position by reversing the procedure described above.

In the main text of the present invention, detailed explanations of the ink supply system related to the inkjet head section, the drive system of the head, etc. are omitted for convenience.

As described above, in addition to the effects described later, the inkjet device of the above-mentioned embodiment completes the printing device by assembling and arranging a plurality of recording head units that have been separated in advance. Settings can be made with extreme precision. Moreover,
At that time, the ink ejection ports in all units can be accurately lined up. Furthermore, in the above-mentioned embodiment, even at the time of assembling each recording head unit, its constituent parts are carefully examined so that only those with good performance can be assembled. or,
As mentioned above, even if it becomes necessary to replace a unit due to damage, etc., the replacement work can be done by simply removing and attaching the relevant part of the unit, making maintenance and management of the entire recording device extremely efficient and economical. I can do it.

As detailed above, in order to electrically connect a terminal and a lead wire, the present invention presses the terminal and the lead wire in a rotatable state around an axis according to the thickness of the terminal and the lead wire. The device is equipped with a pressing means to do this. Therefore, according to the present invention, even if there is variation in the thickness of the terminal and the lead wire, it is possible to press the terminal and the lead wire in a rotatable state around the shaft. Therefore, according to the present invention, both parts can be pressed and fixed with high accuracy without applying an excessive load to the thicker part than other parts.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of the recording device of the present invention, and FIG.
The figure is a perspective view of the appearance of a head unit according to the invention, and FIG. 3 is a partial perspective view of the appearance of the recording apparatus of the invention, illustrating the main parts of the invention. In the figure, 101 and 307 are recording head units, 102 and 303 are ink ejection orifices, and 1
03, 201, 308 are inkjet head parts, 104, 204 are drive control parts, 105 are wiring parts, 106, 301 are support plates, 107, 302 are head positioning plates, 108, 310, 310' are head holding plates, 109,210,314,318
is a printed board, 110, 312 is a cable, 11
1,313 is a connector, 112 is a pressing jig, 1
13, 311 is a lead terminal mounting plate, 114 is a signal line, 202, 309 is a unit board, 315 is a wiring part, 203, 317 is a wiring part support stand, 320 is a crimping rod, 322 is a crimping lever, 325 is a crimping screw. be.

Claims (1)

[Scope of Claims] 1. In an inkjet device that records on a recording medium by ejecting ink from ejection ports, a terminal provided for each group of the plurality of ejection ports is electrically connected to each of the terminals. a common lead wire for electrically connecting the terminal and the lead wire, and pressing the terminal and the lead wire in a rotatable state around an axis according to the thickness of the terminal and the lead wire; An inkjet device characterized by comprising: a pressing means for doing so. 2. The inkjet device according to claim 1, wherein the plurality of ejection ports are detachable in groups. 3. The inkjet device according to claim 1, wherein the plurality of ejection ports for each group have a drive control section and a wiring section, and constitute a head unit. 4. The inkjet device according to claim 1, wherein the common lead wire is constructed of a flexible printed board. 5. Claim 1, wherein the pressing means presses the terminal and the lead wire through a rubber sheet.
The inkjet device described in .