JPS59188447A - Electrode terminal structure - Google Patents

Abstract

PURPOSE:To eliminate the need to apply soldering and tapping work to stainless sintered metal electrodes by a method in which mutually crossing holes are provided in the electrode in an ink jet recorder and pins are inserted into the holes and pressed with lead wire. CONSTITUTION:A deflecting electrode 29 is inserted into a deflecting electrode holder 110, and a tiered screw 113 is screwed with a tap-thread 114 to fix the deflecting electrode 29. A hole 29d crossing a hole 29c is drilled in the lower end of the hole 29c of the deflecting electrode 29, a lead wire 115 is inserted through the hole 29, and a core wire 115a is pressed on the deflecting electrode 29 and fixed by the tip of the tiered screw 113.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrode terminal structure, and more particularly, to an electrode terminal structure for drawing out a lead wire from a charging electrode, deflection electrode, etc. in an inkjet recording device.

Conventional Drum Wheel FIG. 1 is a plan configuration diagram showing an example of the carriage section of an inkjet recording apparatus previously proposed by the present applicant, FIG. 2 is a side configuration diagram, and FIG. 3 is a sectional view taken along the m-In line. In the figure, 15 is the platen, 16.16' is the pressure roller,
17 is a paper pail roller, and the recording paper 18 enters from behind the platen 15 in the direction of the arrow, passes through the paper pail roller 17, and is discharged. 19 is a carriage, 20
．． 20' is a carrier axis, and the carriage 19 moves along an axis parallel to the carrier axis 20.20'. A carriage harness 21 includes a signal line for controlling ink droplets and a tube for supplying and collecting ink. Ink supplied by a pump (not shown) passes through the carriage harness 21, through the supply tube 22, through the final filter 23, and through the heater portion 24 and into the head 25. Reference numeral 26 denotes a holder for holding the head 25 and electrodes, and the head 25 is held by being pressed from behind by a leaf spring 27. 28 is a charging electrode, 29.29'
30 is a deflection electrode, 30 is a gutter, and 31 is a mist absorption plate for absorbing the generated mist, and among the ink droplets ejected from the head 25, the ink droplets 3 charged by the charging electrode 28 are
2 is deflected by deflection electrodes 29, 29' and adheres to the recording paper 18, and uncharged ink 'a32' passes through the gutter 30, passes through the hole 34 of the collection holder 33, passes through the carriage harness 21, and is circulated by a pump. be done. Further, 35 is a holding plate of the carriage harness 21, and 36 and 36' are balance absorbing plates of the carriage harness 21.
6.36' is made from soft sponge and foam.

37 is a plastic foam material, and Miss 1 to absorption plate 17
This is an absorbent pad that absorbs ink mistakes 1- absorbed by capillary action.

In the above-mentioned Infusiera 1 recording apparatus, the front part of the holder 26 holding the head 25 is connected to the holder base 3.
The holder base 38 is attached to the carriage 19 so as to be rotatable in the vertical direction around a fulcrum shaft 39, and the rear part of the holder 26 and the holder base 38 are A vertical adjustment screw 41 is provided between the rear parts, and the holder 26 is pushed upward by a compression spring 41', so when the vertical adjustment screw 41 is turned, the rear part of the holder 26 is lowered by one foot. , the ejection direction of ink emitted from the head 25 changes in the vertical direction. Further, a notch 42 is provided at the rear of the holder base 38 , and the side of an eccentric screw 43 is in contact with this notch 42 , and when the eccentric screw 43 is rotated, the holder base 38 moves around the fulcrum 40 . Therefore, the holder 26 holding the head 25 moves left and right, and the ejection axis changes.

As mentioned above, the above-mentioned Ingen 1-recording apparatus can adjust the ejecting direction of the ink emitted from the head downward and to the left and right, so even if the ejecting axis of the head is slightly offset, Although it is possible to maintain a constant direction and maintain a stable image, there are still problems as described below.

(A) Head and Charging Electrode Unit Since the head 25 has many steps in its outer shape, its radial dimension is large, and its longitudinal dimension is short, a spring 27 is used to bias the collar 45 from the step. However, due to vibrations of the carriage, etc., the head would tilt and the direction in which the ink droplets would be ejected would be distorted. Further, the head holder 26 is recessed toward the head side, and has a hole 26' through which ink droplets ejected from the head 25 pop out. When replacing the head, first the charging electrode 28 is inserted into the recess of the head holder 26, then the collar 45 is inserted, then the head 25 is attached and the whole is fixed at the same time with the spring 27. Therefore, in this case, the head 25
The gap between the collar 45 and the charge electrode 28 is controlled by adjusting the length of the collar 45 to the desired length.

However, the head and charging electrode part have the following problems.

(a) It is necessary to disassemble the head each time the charging electrode is replaced.

(b) The charging electrode is buried in the holder, making it difficult to take out the electrode lead wire.

(e) Since a collar is used, the accuracy of the collar components affects the accuracy of head attachment, and there is a risk of loss during replacement.

(d) Since the collar is separate from the head holder, it is difficult to hold the head in a stable position, and there is a risk that the head may be installed at an angle.

(e) The charging electrode must be made of porous sintered metal to absorb ink mist when ink is ejected, but to prevent corrosion from the ink (weakly alkaline), it is made of stainless steel sintered metal. (I cannot use soldering due to the same problem).

(b) Deflection electrode section In FIGS. 1 and 3, 29 is an upper deflection electrode;
' is a lower deflection electrode (ground electrode), the gap between both electrodes is several 1, and a voltage of (-) several KV is applied to the upper deflection electrode 29 in order to deflect the charged ink droplets. ing. Therefore, a high voltage of several kilovolts is present between the upper and lower electrodes, and if the distance between them becomes short for some reason, discharge will occur and a machine error will occur. For example, splashing ink mistakes 1-1 or purging mistakes I- during printing may adhere to the upper deflection electrode 29 [since the ink droplets are charged to (+), they may adhere to the upper deflection electrode at (-) potential. ],
The surface of the holder becomes conductive or nearly conductive, causing electrical discharge and causing machine errors. Also, during printing, ink droplets hit the recording paper and turn into mist, and a part of it enters the carriage through the opening 31' of the mist absorption plate 31, where it is placed on the upper (-) side electrode. The upper deflection electrode 29 and the lower deflection electrode 29' adhere to the electrode 29 and surrounding holders and spread over time, but the upper deflection electrode 29 and the lower deflection electrode 29' are attached to the center of the holder 46 and 46', respectively, as shown in FIG. These holders are fixed to the carriage with screws 47. Therefore, as described above, if the ink mistakes 1 to 1 enter the carriage through the opening 31' and the surface of the holder becomes dirty with ink, and the distance between the upper electrode 29 and the lower electrode 29' becomes less than a certain distance, a discharge phenomenon occurs. This may result in failure of deflection and damage to the circuit. Therefore, it is necessary to increase the distance between the edges of the holder that fixes the upper and lower deflection electrodes, but there are limits to this as well. Furthermore, conventionally, when attaching the deflection electrode to the holder, as shown in FIG.
．． 46', but as mentioned above, a stainless steel sintered member is used as the electrode in consideration of corrosion to the ink, so the sintered particles are coarse and the density is low. There were problems such as difficulty in tapping and poor mass productivity.

■□The present invention was made in order to solve the above-mentioned problems.In particular, when stainless steel sintered metal is used as an electrode, it can be used as a lead without soldering or tapping. By making it possible to draw out the wire, in drawing out the lead wire from the stainless steel sintered metal electrode,
This eliminates the difficulties of soldering, tapping, etc.

The structure of the present invention will be described below based on examples.

FIG. 4 is a plan configuration diagram of the carriage portion of the inkjet recording apparatus according to the present invention, FIG. 5 is a side configuration diagram, and FIG. 6 is an exploded perspective view of the main parts. The operative parts are provided with the same reference numerals as in FIGS. 1-3.

4 to 6, 25 is a head, and 26 is a head holder. As shown in FIG. 5, the head holder 26 is configured to the actual length. The head 25-8 has the smallest diameter part of the stepped part inside so that the charging electrode 28 can be inserted from the right side, so that the small diameter part 101 at the right end of the head 25-8 abuts against the smallest diameter part of the holder 26. The holder 26 is inserted from the left side and positioned. On the other hand, a groove 102 into which the leaf spring 27 is inserted is cut in the left end of the head holder 26, and the opening elongated hole 103 of the leaf spring 27 is inserted through the groove 102. After the head 25 is inserted into the head holder 26 and positioned, the leaf spring 2
7 into the groove 102 from above the head holder, thereby positioning and fixing the rear part 104 of the head 25. Therefore, since the head 25 is positioned and fixed to the head holder 26 at the front and rear portions of the head holder 26, the stability of the fixed position of the head is increased, and therefore, the ejection direction does not change.

On the other hand, the charging electrode 28 is inserted into the holder 26 from the right side in the figure, and is positioned at the stepped portion of the holder. A spring 105 is inserted from the right side and finally fixed with a plastic cap 106. That is, as described above, since soldering to a charged electrode is difficult, a special part for drawing out the electrode terminal, that is, the electrode terminal/plate spring 105 is provided, and the electrode terminal/plate spring 105
is brought into contact with the charging electrode 28 to apply a charging potential to the charging electrode 28, but by doing this,
The insertion direction aligned with the holder 26 is the head 25 and charging electrode 2.
8, these can be attached to and removed from the holder independently, eliminating the need for parts such as collars, and since they are integrated with the holder, no looseness occurs.

It should be noted that the plate spring 105 is made of stainless steel in order to improve corrosion resistance, contact properties, etc., and is partially bent 107 to provide spring properties. In addition, the leaf spring 105 and the inner diameter hole 105' of the cap 106,
106' is configured to pass through a step 28' of the charging electrode 28, which holds them coaxially and prevents them from wobbling. Further, the connection between the lead wire 108 and the electrode terminal/plate spring 105 is performed by caulking means 109. Reference numeral 110 denotes a deflection electrode holder, and the deflection electrode holder 110 is configured so that the support 1 to 110' for attaching the holder to the carriage is moved rearward to move away from the entry port 31' of the ink mistake 1-. If this is done, the edge distance between the lower deflection electrodes will be significantly increased. In addition, 111 is an inlet port 31' for support 1 to part 110' and ink mist 1.
A part of the scar 1 with a 1 degree angle between the scars 1 and 1
1] to block ink mist 1~ from entering, the ink mist is almost completely prevented from adhering to the support portion 110', and the surface of the deflection electrode holder is contaminated by the ink mist 1 and causes a discharge phenomenon. This will no longer be the case.

FIG. 7 shows the deflection electrode 29 relative to the deflection electrode holder 110.
8 is an exploded perspective view for explaining an example of the structure, and FIG. 8 is a partial sectional view after assembly.As shown in the figure, the deflection electrode 29 is provided with a flange (protrusion) 29ati, On the other hand, the deflection electrode holder 110 is provided with a protruding arm 112, and the arm portion 112 is provided with a recess 112a that engages with the flange 29a.
12a and 11-, and insert and position the deflection electrode 29 into the deflection electrode 1]0 from the direction of the arrow. 113 has a small diameter part 113 at the tip.
A tapped screw 11.4 is cut into the deflection electrode holder 10 to be screwed into the stepped screw 113, while the deflection electrode 29 has a small diameter portion of the stepped screw 113. Hole 29c into which 113a is inserted is drilled,
As described above, the deflection electrode 29 is attached to the deflection electrode holder 11.
0, the stepped screw 113 is screwed into the tap screw 14 to fix the deflection electrode 29.

At this time, a hole 29d perpendicular to the hole 29c is opened at the lower end of the hole 29c of the deflection electrode 29, and the lead wire 115 is inserted through the hole, and the core wire portion 115a of the lead wire 115 is inserted into the hole 29d. It is preferable to press and fix the tip of the stepped screw 113 against the deflection electrode.

FIG. 9 shows the deflection electrode 29 relative to the deflection electrode holder 110.
The mounting diagram is a main part configuration diagram for explaining another example of the structure. In this example, there are
In addition, a convex portion that engages with the recess is provided on the holder 12-110 side, and as described above,
The deflection electrode 29 is inserted into the holder 110 by aligning these uneven portions. Note that the positioning of the deflection electrode 29 in the front-rear direction can be done by providing a stopper on the holder, but as described above, it is also possible to provide a tapped hole on the holder side and also make a hole on the electrode side, and position it with a stepped screw. By doing so, the stepped screw can also be used as a presser for the electrode lead wire.

As is clear from the above description, according to the present invention, when drawing out a lead wire from a stainless steel sintered metal terminal, it is necessary to perform soldering, tapping, etc. to the stainless steel sintered metal electrode. Since there are no holes, it is very easy to pull out the lead wires.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a plan configuration diagram of a carriage portion for explaining an example of an inkjet recording device previously proposed by the applicant;
Figure 2 shows the side structure, and Figure 3 shows the side structure. 4 is a plan configuration diagram of a carriage portion for explaining an example of an inkjet recording apparatus according to the present invention, FIG. 5 is a side configuration diagram, and FIG. 6 is an exploded perspective view of essential parts. , FIG. 7 is a partial perspective view for explaining the relationship between the deflection electrode holder and the deflection electrode, FIG. 8 is a partial cross-sectional view after assembly, and FIG. 9 is for explaining another example. FIG. 25...Head, 26...Head holder, 28...
Charging electrode, 29.29'... Deflection electrode, 29a...
Flange (convex) portion, 105... Electrode terminal/plate spring, 106.
... Cap, 110 ... Deflection electrode holder, 111.
...Skirt part, 112...Arm part, 112a...
Groove (concave) part, 113 step screw. 15- 275- Figure 6 27 Figure 7 Figure 8 Figure 9 10

Claims (3)

[Claims] (1) It has a main electrode made of stainless steel bonded metal and an auxiliary electrode treated with a lead wire, and the auxiliary electrode is brought into contact with the main electrode to constitute an electrode terminal for the main electrode. An electrode terminal structure in an infusiera 1-recording device characterized by: (2) The inkjet recording apparatus according to claim (1), wherein the auxiliary electrode has a plate spring structure, and the plate spring structure is brought into pressure contact with the charging electrode. Electrode terminal structure in. (3) An electrode made of stainless steel sintered metal, the electrode has holes that intersect with each other alternately, and a lead wire is inserted into one hole and a pin is inserted into the other hole to hold the lead wire. An electrode terminal structure characterized by: