WO2006054454A1 - 加熱放電型印字ヘッド - Google Patents
加熱放電型印字ヘッド Download PDFInfo
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- WO2006054454A1 WO2006054454A1 PCT/JP2005/020389 JP2005020389W WO2006054454A1 WO 2006054454 A1 WO2006054454 A1 WO 2006054454A1 JP 2005020389 W JP2005020389 W JP 2005020389W WO 2006054454 A1 WO2006054454 A1 WO 2006054454A1
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- Prior art keywords
- discharge
- heat
- print head
- electrode
- heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
Definitions
- the present invention relates to a heat-discharge type print head for forming an electrostatic latent image on an electrostatic development type recording medium capable of repetitive recording by the action of electric discharge.
- Patent Document 1 an ion irradiation method, which is an electrostatic latent image forming method different from the electrophotographic method, has been developed.
- the electrophotographic method uses two steps of uniform charging and exposure to release the charge of the exposed part on the uniformly charged photoconductor, thereby electrostatic latent image on the photoconductor as the electrostatic latent image carrier.
- the ion irradiation method in the atmosphere where ions can be generated (in the air, etc.)! /, Due to the discharge from the discharge electrode! Since electrostatic latent image formation can be completed on the electrostatic latent image carrier (insulator is not necessary, so it is not necessarily a photosensitive body) with only electrostatic latent image formation charging. This is a more simplified electrostatic latent image forming system that does not require any exposure optical system.
- An application of an electrostatic latent image forming method using an ion irradiation method is a static image in which a visible image appears inside due to the action of the electric charge of the electrostatic latent image formed on the surface.
- An electrostatic latent image can be directly formed by ion irradiation on an electro-development type recording medium to change the latent image into a visible image.
- the heating / discharging method as shown in (Patent Document 1) and (Patent Document 2), which discharges by selective heating of the discharge electrode, is a driver IC that supports low withstand voltage such as 5V drive for heating control. From the viewpoint of controlling discharge, this is the most excellent control method. For this reason, in order to write in a non-contact manner on an electrostatic development type recording medium generally called a digital paper, the one shown in (Patent Document 2) is an optimum print head that can be considered at present.
- a minute ball is color-coded into two colors (for example, black and white), and the ball is rotated by the difference in electrical characteristics of each color to display an arbitrary color.
- Two colors (for example, black and white) of fine powder are mixed in the ball.
- An electrophoretic method in which only one color is floated and displayed due to the difference in electrical characteristics of the fine powder of color, and a liquid crystal that displays the background color of the part where the shutter is opened by opening and closing the liquid crystal shutter of the liquid crystal plate or small liquid crystal block There are methods.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-326756
- Patent Document 2 Japanese Patent Application No. 2004-069350
- the conventional print head has the following problems.
- a heating part having a heating element for heating the discharge electrode on a hard substrate such as ceramic is provided in the lower layer, a protective film for insulating the heating part is provided in the intermediate layer, and a discharge part having the discharge electrode is provided in the upper layer.
- the head substrate is formed by laminating, but since such a hard substrate cannot be curved, the shape of the print head is determined depending on the shape of the head substrate.
- Patent Document 2 a technology for forming a non-planar substrate using a material such as ceramic to determine the shape of the print head is used. Due to the above restrictions and restrictions on the technology for forming discharge devices such as heat generating parts and discharge parts on non-planar substrates, there was a problem of lack of workability, design flexibility and mass productivity.
- the present invention solves the above-described conventional problems, and by forming a discharge device on a planar substrate by forming the substrate itself with flexibility, the substrate on which the discharge device is formed is formed in a desired shape.
- Heat-discharge type print head with excellent processability, mass productivity, and practicality that can be processed into a wide range, has excellent workability and assembly workability, and can overcome limitations on substrate and discharge device formation technology. The purpose is to provide.
- the heat-discharge type print head of the present invention has the following configuration.
- the heat discharge type print head according to claim 1 of the present invention is a heat discharge type print head that generates discharge from the discharge electrode by controlling the temperature of the discharge electrode to which a discharge control voltage is applied.
- a print head which is a heat-resistant and insulating flexible substrate, a heat-generating portion having a heating element formed on the flexible substrate, and a heat-resistant and insulating flexible thin film covering the heat-generating portion. And a discharge part having the discharge electrode formed on the flexible thin film and heated by the heating element.
- This configuration has the following effects.
- a flexible substrate on which a discharge device such as a heat generating portion or a discharge portion is formed can be processed into a desired shape, it is desired to form a discharge device on a planar flexible substrate by a technically easy method after the discharge device is formed. If it is processed into a shape, it is possible to manufacture a heat-discharge type print head of a desired shape (previously requiring a high level of technology) using a simple technique, which is excellent in productivity.
- the discharge electrode to which the discharge control voltage is applied can be heated and controlled by a heating element insulated with a flexible thin film, and thermoelectrons are emitted from the heated discharge electrode, and discharge and light emission occur to generate ions.
- the amount of ions generated can be controlled, and recording can be performed on a dedicated recording medium such as an electrostatic development type digital paper.
- the flexible thin film covering the heat generating part has heat resistance and insulating properties, the heat generating element that is not thermally deformed by the heat generated by the heat generating element and the electrodes connected to the heat generating element are protected and discharged. Insulation with the electrode can be ensured, and the discharge electrode can be heated.
- the flexible substrate and the flexible thin film may be polyimide, aromatic polyamide, polyphenylene oxide, polybenzimidazole, polyphenylene quinoxaline, polyarylate, poly, as long as it is a thin film resin having heat resistance and insulating properties.
- Ether imide, polyether sulfone, polyphenylene sulfide, polyether ether ketone, amide, etc. are preferably used. Although it depends on the heating conditions of the heat generating part, if it has a heat resistance of about 300 ° C to 400 ° C at the maximum, it can withstand the heating of the heat generating part. Also, the force that requires insulation according to the voltage applied to the discharge electrode.
- the thickness of the flexible substrate is preferably 6 ⁇ m to 20 ⁇ m. As the thickness of the flexible substrate becomes thinner than 6 m, handling becomes difficult, and mass productivity and durability tend to decrease. As the thickness becomes thicker than 20 m, the heat transfer efficiency to the discharge electrode tends to decrease. Neither is desirable. In addition, if the dielectric breakdown voltage of the flexible substrate and the flexible thin film is about 100 kVZmm to 300 kVZmm, it is possible to apply the voltage necessary for generating the discharge.
- the discharge control voltage applied to the discharge electrode refers to a voltage range in which discharge does not occur only by application, but discharge occurs by heating. Since the discharge generation voltage can be controlled by applying a discharge control voltage to the discharge electrode and heating in the heat generating part, any discharge electrode or electrode can be easily selected by selecting the heating point by the heat generating part. Discharge can be selectively generated from any position (discharge generation part), and the flexibility of the shape of the discharge electrode is excellent. Of the discharge part, the vicinity of the heating position by the heat generating part is the discharge generating part.
- the discharge portion of the heat-discharge type print head is formed by using a common electrode at one end of the plurality of discharge electrodes. It can be connected and formed in a comb shape, or both ends of a plurality of discharge electrodes can be connected by a common electrode to form a ladder shape.
- the discharge part is formed in a flat plate shape, the portion heated by the heat generating part becomes the discharge generating part, so that the discharge is surely generated without fine alignment between the discharge part and the heat generating part. It is excellent in reliability and mass productivity.
- the heat radiation area of the discharge part is increased and the heat capacity is increased, so that the cooling effect of the discharge electrode and the response to heating stop are improved, and the resistance value is reduced. Since a stable voltage can always be applied, the discharge stability can be further improved.
- the width of the common electrode of the discharge part is wider than the width of the discharge electrode, such as a comb shape or a ladder shape, the cooling effect of the discharge electrode that is temporarily heated to 100 to 300 ° C Therefore, it is possible to quickly stop the discharge in response to turning off the heating, shorten the discharge time interval, and switch the presence or absence of the discharge in a short time.
- the resistance value of the common electrode can be reduced, so that it is generated between each discharge electrode connected by the common electrode. As a result, the variation in discharge amount at each discharge electrode can be reduced, and the discharge stability is excellent.
- a conductive material layer may be formed on at least the surface of the common electrode in the discharge part.
- the resistance value of the common electrode can be further reduced, the potential difference generated between the discharge electrodes can be reliably reduced, and the discharge stability is excellent.
- the conductive material layer has conductivity superior to that of the discharge part, it can be easily formed by screen printing of silver paste or silver plating. By increasing the thickness of the conductive material layer, the resistance value of the common electrode can be reduced, and the discharge stability can be improved.
- the discharge electrode When the discharge part is formed in a comb-like shape, the discharge electrode can be formed in a substantially rectangular shape, trapezoidal shape, bullet shape, semicircular shape, or a combination thereof. Further, the peripheral length of the periphery of the discharge electrode can be increased by dividing a part of the discharge electrode with a slit or the like or by forming an uneven portion on the peripheral edge. Since the discharge electrode has a large amount of discharge from the periphery of the edge, it is possible to increase the amount of discharge from the discharge electrode by increasing the peripheral length of the periphery of the edge, increasing the amount of irradiated ions and the emission intensity.
- the discharge control device is excellent in energy saving and efficiency. In addition, since the voltage applied to the discharge electrode can be set small, the discharge electrode has excellent long life.
- the discharge hole portion may be formed corresponding to the heating position of the heating element.
- a discharge can be generated from the periphery of the edge of the discharge hole, and the same effect as that obtained by dividing the end of the discharge electrode can be obtained.
- the shape of the discharge hole can be formed in various shapes such as a substantially circular shape, a substantially elliptical shape, a polygon such as a quadrangle and a hexagon, and a star shape. Further, the number, shape, size, etc. of the discharge holes per heating place can be appropriately selected and combined.
- a metal such as gold, silver, copper, and aluminum is formed by vapor deposition, sputtering, printing, plating, etc., and then etched to form a pattern as necessary. Etc. are preferably used.
- a conductive material such as carbon may be used.
- the thickness of the discharge electrode varies depending on the material and the characteristics of the recording medium used, the thickness when the discharge electrode is formed of gold is preferably 0.1 ⁇ m to 100 m. As the discharge electrode thickness becomes thinner than 0.1 ⁇ m, it is more susceptible to wear and the discharge electrode life tends to be shorter. There is a tendency that the heat capacity increases as the thickness exceeds 100 m, and the response to heating on / off tends to decrease, and the deviation is also preferable.
- a ground electrode portion or positive electrode for applying an electric field between the discharge electrode of the heating discharge type print head and the recording medium is provided. It is preferable to provide a positive voltage application unit that applies voltage. By providing the ground electrode part, it is possible to irradiate ions from the discharge electrode of the heat discharge type print head toward the recording medium. In addition, when irradiating negative ions, by providing a positive voltage application unit, a positive voltage can be applied to the recording medium side, and the same effect can be obtained. As a result, the unit dots printed by the heat-discharge type print head can be miniaturized, the irradiation position accuracy can be improved, and high-definition recording can be performed.
- a head substrate is formed by forming a discharge device such as a heat generating portion or a discharge portion on a flexible substrate.
- the heating means is to electrically connect the driver IC and the heat generating part and to control the heating of the heat generating part to the heating element by the driver IC.
- a discharge control device of the heating discharge type controls the discharge of the discharge electrode force of the discharge part.
- the heating means is equipped with a driver IC that selectively energizes the heating element to control the heat generation of the heating element, it is possible to control the heat generation of the heating element at a low voltage and the voltage applied to the discharge electrode As a result, the discharge control device can be reduced in size and extended in life. Further, it is excellent in mass productivity and reliability as a heat discharge type print head.
- the same configuration as that of a thermal print head used in a conventional thermal facsimile can be suitably used.
- the heating elements are electrically connected with electrodes formed in a comb-like or matrix pattern, a part corresponding to an arbitrary discharge electrode in one heating element or a plurality corresponding to individual discharge electrodes Any of the heating elements can be selectively energized to generate heat.
- the heating element TaSiO, RuO or the like is preferably used.
- the heat discharge type print head is obtained by disposing a printed wiring board having a connector for electrically connecting to the outside together with a discharge control device on a heat radiating plate formed of a material such as aluminum. Since the head substrate of the discharge control device has flexibility, it can be fixed to the heat sink by bending or bending according to the shape of the heat sink. For this reason, the discharge electrode has a substantially obtuse angle with the end face of the heat sink that is substantially perpendicular to the surface of the heat sink, the raised portion that protrudes from the surface of the heat sink and is formed into a loose hill, etc., and the surface of the heat sink. It can be easily placed at various positions such as the edge of the heat sink, providing excellent design flexibility and productivity.
- the driver IC is placed on the surface of the heat sink or on the same plane as the heat sink, the discharge electrode is placed on a different surface from the driver IC placement surface, and the discharge electrode placement surface and the driver IC are placed. Therefore, it is possible to increase the degree of freedom of arrangement of the heat-discharge type print head and improve versatility. It is better not to bend like a digital paper or the like! Since the recording medium can be conveyed linearly without interfering with the driver IC, it can be suitably used for a horizontal printer. In addition, since the electrostatic latent image can be formed from an optimum position with respect to the electrostatic latent image carrier having various shapes, the versatility and the reliability of the image quality are excellent.
- the head substrate of the discharge control device on the heat sink, the heat generated in the heat generating portion can be quickly absorbed into the heat sink and the heat dissipated by the heat sink. Cooling is possible. As a result, it is possible to improve the response of the discharge stop corresponding to the heating stop. It is excellent in reliability because it can protect the driver IC etc. with heat. In the range that does not affect the mounting of the discharge control device and printed wiring board, if the surface of the heat sink is uneven by grooves, the surface area of the heat sink can be increased and the efficiency of heat dissipation can be improved. be able to.
- this heat-discharge type print head it is possible to form an electrostatic latent image or an image by oxidation-reduction reaction. Also, according to the light emission accompanying discharge, it is possible to use a digital paper or the like using a photochromic compound that forms an image with ultraviolet rays or visible rays as a recording medium.
- An IC cover may be placed on the surface of the driver IC to protect the driver IC. . As a result, it is possible to reliably prevent the driver IC and the recording medium from coming into contact with each other, and the reliability is excellent.
- the invention according to claim 2 is the heat-discharge type print head according to claim 1, comprising an insulating film formed on at least one of both surfaces of the flexible thin film. It has a configuration.
- the insulating film may be a thin film made of an inorganic material such as SiON or SiO, or other insulating films.
- the thin film may be formed of a material having an affinity (regardless of organic or inorganic).
- a material having an affinity regardless of organic or inorganic.
- those having high thermal conductivity that can efficiently transfer the heat of the heating element to the discharge electrode are preferred.
- an insulating film is formed by multiple coatings, even if pinholes are generated by each coating, the possibility of overlapping pinholes can be reduced by repeated coating. Since the heat generating portion can be reliably insulated, the reliability is excellent.
- a heat-discharge type print head is a heat-discharge type print head that generates a discharge from the discharge electrode by controlling the temperature of the discharge electrode to which a discharge control voltage is applied.
- a flexible substrate having heat resistance and insulation; a discharge part having the discharge electrode formed on one surface side of both surfaces of the flexible substrate; and the other surface side of both surfaces of the flexible substrate And a heating part having a heating element for heating the discharge electrode.
- This configuration has the following effects.
- a flexible board on which a discharge device such as a heat generating part or a discharge part is formed can be processed into a desired shape and has great processability and versatility. If the flexible substrate is covered with the desired shape after it is formed, a heat-discharge type print head with a desired shape (previously requiring advanced technology) can be manufactured using a simple technique, which is excellent in productivity.
- a heating element in which a discharge electrode to which a discharge control voltage is applied is insulated by a flexible substrate
- the heating can be controlled by the discharge electrode, thermionic electrons are emitted from the heated discharge electrode, discharge and light emission occur, and the ion generation amount can be controlled in an atmosphere where ions can be generated. It is possible to record on a dedicated recording medium such as an electro-developing digital paper.
- the flexible substrate has heat resistance and insulation properties, it protects the heating element that is not thermally deformed by the heat generated by the heating element and the electrode connected to the heating element to ensure insulation from the discharge electrode.
- the discharge electrode can be heated.
- the heating and discharging type print head of claim 3 is the same as that of claim 1 except for the arrangement of the flexible substrate, the discharge part, and the heat generating part. The description is omitted.
- the invention according to claim 4 is the heat-discharge type print head according to claim 3, comprising a flexible thin film having heat resistance and insulation covering the heat generating portion. Have.
- the flexible thin film is the same as in claim 1 and the description thereof is omitted.
- a heat-discharge type print head is a heat-discharge type print head that generates a discharge from the discharge electrode by controlling the temperature of the discharge electrode to which a discharge control voltage is applied.
- a discharge unit comprising: (a) a flexible substrate having heat resistance and insulation; and a discharge part having the discharge electrode formed on one side of both surfaces of the flexible substrate; A heating unit having a heating element for heating the discharge electrode, and a heating unit disposed on the other side of the both sides of the flexible substrate of the discharge unit. ing.
- a discharge unit having a discharge part and a heat generation unit having a heat generation part are separately formed, and they are combined to form a head substrate.
- a discharge device separation type the material, shape, formation method, etc. of the flexible substrate, the discharge part, and the heat generation part are the same as in claim 1, and the explanation is omitted.
- the heat generating part of the heat generating unit may be formed on a flexible substrate having flexibility similar to the discharge unit, or may be formed on a hard substrate such as ceramic.
- the discharge unit and the heat generating unit can be fixed by bonding the substrates together with a heat-resistant adhesive.
- the positioning of the discharge unit and the heat generating unit can be performed by protruding a positioning pin on one of the substrates and fitting the pin.
- the invention according to claim 6 is the heat discharge type print head according to claim 5, wherein the discharge unit and the heat generating unit are detachably arranged! / Have a scolding configuration! / Speak. With this configuration, in addition to the operation of the fifth aspect, the following operation is provided.
- the discharge unit and the heat generating unit are detachable so that if any one of them is defective, it can be easily replaced or repaired, especially when the discharge electrode is worn. Since the unit can be replaced, the running cost of the heat-discharge type print head can be reduced, and the maintenance and resource saving are excellent.
- the positioning of the discharge unit and the heat generating unit can be performed by pin fitting as described above. After positioning, both ends of the discharge unit and the heat generating unit in the longitudinal direction and the outer periphery can be sandwiched by a detachable fixing jig and fixed by a detachable fixing means such as pin fitting or screwing.
- the invention according to claim 7 is the heat-discharge type print head according to any one of claims 3 to 6, wherein the force is formed on at least one of both surfaces of the flexible substrate.
- the insulating film is provided with a structure.
- the invention according to claim 8 is the heating discharge type print head according to any one of claims 1 to 7, wherein the discharge electrode is insulated from the discharge electrode on the discharge portion side of the flexible substrate.
- the induction electrode is formed and has a structure.
- the induction electrode may be formed so as to be horizontally spaced (offset) from the end (edge) on the discharge generation side of the discharge electrode!
- an induction electrode is formed on the flexible thin film covering the heat generating part, and the induction electrode is covered with a flexible thin film similar to the flexible thin film covering the heat generating part.
- a discharge electrode can be formed.
- the induction electrode and the discharge electrode may be formed side by side on the flexible thin film covering the heat generating part, and the induction electrode may be covered with the flexible thin film, or the discharge electrode is formed on the flexible thin film covering the heat generating part.
- the induction electrode may be formed on the discharge electrode other than the end (edge) on the discharge generating portion side with a flexible thin film.
- an induction electrode is formed on the flexible substrate on which the discharge part is formed, and a flexible thin film is formed.
- the discharge electrode can be formed on the induction electrode.
- the induction electrode and the discharge electrode may be formed side by side on the flexible substrate, and the induction electrode may be covered with a flexible thin film, or on the flexible substrate. It is also possible to form a discharge electrode and form an induction electrode after covering the discharge electrode other than the end (edge) on the discharge generation side with a flexible thin film.
- the invention according to claim 9 is the heat discharge type print head according to any one of claims 1 to 8, wherein the heat resistance is such that the discharge electrode is covered leaving a discharge generation portion. And a flexible coating film having insulation properties.
- the discharge can be prevented from being generated from an extra portion other than the discharge generation portion of the discharge electrode. Can be focused on a single spot and the image forming efficiency is excellent.
- a step can be formed between the surface of the discharge generation part and the surface of the flexible coating film.
- the gap between the recording medium and the recording medium to be arranged can be kept constant, the contact with the discharge generation part can be prevented, and the discharge with the strength of the discharge generation part can be stabilized.
- the discharge part the vicinity of the heating position of the heat generating part by the heating element is the discharge generating part.
- the flexible coating film is covered on the common electrode and on the discharge electrode excluding the discharge generation part. More specifically, the flexible coating film has openings formed in a substantially circular shape, a substantially elliptical shape, a substantially rectangular shape, etc. in the discharge generating portion of the discharge portion (near the heating position of the heat generating portion by the heating element). Have.
- the opening may be formed independently for each of the plurality of discharge generating portions, or may be formed in a continuous long hole shape so as to extend over the plurality of discharge generating portions.
- the same material as that of the flexible thin film is preferably used.
- the invention described in claim 10 is the heating and discharging type print head according to claim 9, wherein It has an uneven structure formed on the surface of the flexible coating film. / With this configuration, in addition to the operation of the ninth aspect, the following operation is provided.
- the discharge electrode to which the discharge control voltage is applied can be heated and controlled by a heating element insulated with a flexible thin film, and thermoelectrons are emitted from the heated discharge electrode, and discharge and light emission occur to generate ions.
- the amount of ion generation can be controlled, and recording on a dedicated recording medium such as an electrostatic development type digital paper is possible.
- a print head can be provided.
- the discharge electrode to which the discharge control voltage is applied can be heated and controlled by a heating element insulated by a flexible substrate, and thermoelectrons are emitted from the heated discharge electrode, and discharge and light emission occur to generate ions.
- the amount of ion generation can be controlled, and recording on a dedicated recording medium such as an electrostatic development type digital paper is possible.
- a print head can be provided.
- Heat-discharge type with excellent productivity and heating efficiency that can insulate heat-generating part and discharge part with flexible substrate and can efficiently transfer heat of heat-generating part to discharge part through flexible substrate A print head can be provided.
- a mold print head can be provided.
- Detachable discharge units and heat generating units can be easily replaced or repaired, and they are excellent in maintainability, and each unit is treated as a consumable item, which saves running costs and saves resources.
- An excellent heat discharge type print head can be provided.
- the step formed between the surface of the discharge generation part and the surface of the flexible coating film can prevent contact between the discharge generation part and the recording medium, and keep the gap between the recording medium and the discharge medium constant. It is possible to provide a heat discharge type print head with excellent reliability that can stabilize the discharge from the generating portion.
- FIG. 1 (a) Schematic side view showing a heat discharge type print head in Embodiment 1 (b) Main part schematic perspective view showing a heat discharge type print head in Embodiment 1
- FIG. 2 is a plan development view of the main part of the head substrate of the heat-discharge-type print head in Embodiment 1.
- FIG. 3 (a) Cross-sectional view taken along line A—A in FIG. 2 (b) B—B in FIG. Cross sectional view
- FIG. 4 is an exploded perspective view of the main part of the head substrate of the heat discharge type print head according to the first embodiment.
- FIG. 5 is a configuration diagram of a discharge control device for the heat discharge type print head according to the first embodiment.
- FIG. 6 is a perspective view showing a heating part forming step of the head substrate of the heat discharge type print head in the first embodiment.
- FIG. 7 is a perspective view showing a discharge portion forming step of the head substrate of the heat discharge type print head in the first embodiment.
- FIG. 8 (a) Schematic plan view showing a first modification of the head substrate of the heat-discharge type print head in Embodiment 1. (b) Schematic cross-sectional view taken along the line CC in FIG. 8 (a).
- FIG. 9 is a schematic cross-sectional view showing a second modification of the head substrate of the heat-discharge type print head in the first embodiment.
- FIG. 10 (a) is a schematic plan view showing a third modification of the head substrate of the heat-discharge-type print head in Embodiment 1. (b) Schematic cross-sectional view taken along line D-D in FIG. 10 (a).
- FIG. 11 (a) Schematic showing a first modification of the heat-discharge type print head in the first embodiment. Side view (b) Requirement showing a first modification of the heat-discharge type print head in the first embodiment. Part schematic perspective view ⁇ 12] (a) Schematic showing a second modification of the heat-discharge type print head in the first embodiment Side view (b) Main part showing a second modification of the heat-discharge type print head in the first embodiment Model perspective view
- FIG. 13 is a diagram showing an ion irradiation method of the heat discharge type print head in Embodiment 1.
- FIG. 14 (a) Schematic side view showing the heat discharge type print head in Embodiment 2.
- Embodiment 2 Schematic perspective view of the main part showing a heat discharge type print head in
- FIG. 15 (a) Plan view of the main part of the head substrate of the heat-discharge type print head in Embodiment 2 (b) Cross section taken along line E—E in FIG. 15 (a)
- FIG. 16 is an exploded plan view of the main part of the head substrate of the heat-discharge type print head in the third embodiment.
- FIG. 17 (a) Sectional view taken along line FF in FIG. 16 (b) Sectional view taken along line GG in FIG.
- FIG. 18 (a) Schematic plan view showing a first modification of the head substrate of the heat-discharge-type print head in Embodiment 3. (b) Schematic cross-sectional view taken along line H—H in FIG. 18 (a).
- FIG. 20 (a) Schematic plan view showing a third modification of the head substrate of the heat-discharge-type print head in Embodiment 3. (b) Schematic cross-sectional view taken along line I-I in FIG. 20 (a).
- FIG. 21 is a configuration diagram of a discharge device separation type heating discharge print head in Embodiment 4.
- FIG. 22 (a) A head substrate of a discharge device separation type heating discharge print head in Embodiment 4. Schematic sectional view showing the discharge unit (b) Schematic sectional view showing the heat generating unit of the head substrate of the heat discharge type print head of the discharge device separation type in Embodiment 4 (c) Discharge device separation type in the embodiment 4 Schematic cross-sectional view showing the head substrate of the heat-discharge type print head (d) Schematic cross-sectional view showing a modification of the head substrate of the discharge device separation-type heat-discharge type print head in Embodiment 4
- FIG. 1 (a) is a schematic side view showing a heating / discharging print head in the first embodiment
- FIG. 1 (b) is a schematic perspective view of a main part showing the heating / discharging print head in the first embodiment. .
- la is an end face type heat discharge type print head corresponding to the horizontal printer type according to Embodiment 1 of the present invention
- 2 is a heat discharge type print head formed of a material such as aluminum
- 3a is an arcuate end surface formed at the tip of the heat sink 2
- 4 is a heat discharge disposed in the heat sink 2 by laminating discharge devices such as a heat generating portion and a discharge portion 15 described later on a flexible substrate described later.
- 5a is a plurality of discharge electrodes of the discharge unit 5 formed in a comb-like shape
- 5b is a common electrode of the discharge unit 5 connecting one end of the discharge electrode 5a
- 7 is a head substrate 4
- a discharge control device for a heat discharge type print head la equipped with a driver IC6, 8 is a printed wiring board provided with a connector 8a for electrical connection with the outside and disposed on the heat sink 2
- 9 is a driver IC6 and a print IC covered to protect the wiring board 8
- the bar 9a is disposed on the back surface of the IC cover 9 and is connected to the common electrode 5b of the discharge part 5 by electrical wiring (not shown) to supply a high voltage (discharge control voltage) to the discharge electrode 5a. It is.
- FIG. 2 is a plan development view of the main part of the head substrate of the heat-discharge type print head according to Embodiment 1
- FIG. 3 (a) is a cross-sectional view taken along the line A—A in FIG.
- FIG. 4 is a cross-sectional view taken along the line BB in FIG. 2
- FIG. 4 is an exploded perspective view of the main part of the head substrate of the heat-discharge type print head according to the first embodiment.
- 10 is a flexible substrate of the head substrate 4 formed of a thin film resin such as polyimide, aramid, polyetherimide, etc. having heat resistance and insulation, and 11 is integrated with a plurality of heating comb electrodes 11a.
- a thin film resin such as polyimide, aramid, polyetherimide, etc. having heat resistance and insulation
- 11 is integrated with a plurality of heating comb electrodes 11a.
- l ib is a common electrode for heating disposed on the top surface of the common conductor pattern for heat generation 11
- 12 is an individual electrode for heating formed on the top surface of the flexible substrate 10 alternately with the comb-shaped electrode for heat generation 11a
- 12a is a bonding pad formed at the end of the individual electrode 12 for heat generation
- 13 is a heat generation part of the discharge control device 5
- 13a is electrically connected to the upper part of the comb electrode 11a for heat generation and the individual electrode 12 for heat generation
- 14 is a heat-resistant and insulating polyimide covered on the upper surface of the flexible substrate 10 except for the ends of the heat generating common electrode l ib and the heat generating individual electrode 12
- a flexible thin film such as aramid or polyetherimide
- 14a is an insulating film formed on the upper surface of the flexible thin film 14
- 15 is a discharge generating portion of the discharge electrode 5a that generates a discharge when
- the discharge section 5 described above is insulated from the heating element 13a by the flexible thin film 14 and the insulating film 14a, and the plurality of discharge electrodes 5a are disposed at positions corresponding to the individual heating electrodes 12 respectively.
- the flexible thin film 14 has heat resistance and insulation, an insulating film 14a is formed on the upper surface of the flexible thin film 14 in order to more reliably insulate between the discharge part 5 and the heat generating part 13.
- the insulating film 14a is formed only on the upper surface of the flexible thin film 14, but the insulating film 14a may be formed on at least one of the both surfaces of the flexible thin film 14.
- Insulating film 14a is made of inorganic material such as SiON or SiO or other insulating material.
- It can be formed into a thin film with a quality (regardless of organic or inorganic).
- a material having high thermal conductivity capable of efficiently transferring the heat of the heating element 13a to the discharge electrode 5a is preferable.
- the insulating film 14a is formed by multiple coatings in multiple times, even if pinholes are generated by each coating, the possibility of overlapping pinholes is reduced by the repeated coating. Since the heat generating portion 13 can be reliably insulated, the reliability is excellent.
- the single-area layer type head substrate 4 is formed in a flat state, it is extremely thin and flexible, so it can be easily processed (deformed) from the flat state into a shape (desired shape) along the heat sink 2. That's right.
- FIG. 5 is a configuration diagram of the discharge control device for the heat discharge type print head in the first embodiment.
- the head substrate 4 has a discharge part 5 and a heat generation part 13.
- Heating part 13 and electrical The heating element 13a of the heat generating part 13a is connected to the driver IC6 (the driver IC6 is wire-bonded to the lead pattern extending from the heat generating part 13 with a gold wire and then sealed with a resin for protecting the IC such as epoxy resin).
- the heating means 16 controls the heat generation. It is the discharge control device 7 of the heat discharge type print head la that controls the discharge from the discharge electrode 5a by controlling the heating of the discharge part 5 to the discharge electrode 5a by the heating means 16.
- the heat generated in the heat generating portion 13 can be quickly absorbed by the heat radiating plate 2 and radiated from the heat radiating plate 2.
- the heat generating part 13 can be rapidly cooled to improve the response to the heating stop.
- it can protect the driver IC6 etc. from heat and has excellent reliability.
- irregularities are formed on the surface of the heat radiating plate 2 by grooves or the like, the surface area of the heat radiating plate 2 can be increased, and the efficiency of heat radiation can be improved.
- FIG. 6 is a perspective view showing a process for forming a heat generating portion of the head substrate of the heat discharge type print head according to the first embodiment
- FIG. 7 is a process for forming a discharge portion of the head substrate of the heat discharge type print head according to the first embodiment.
- FIG. 6 after a conductor such as a gold paste is printed on the surface of the flexible substrate 10 formed in a flat shape, a plurality of comb electrodes 11a for heating and individual heating electrodes connected by a heating common conductor pattern 11 by etching. Electrode 12 is formed. After that, a strip-like shape is printed by printing TaSiO, RuO, etc. on the top of the heating comb electrode 11a and the heating individual electrode 12.
- a heating element 13a is formed. Further, the heat generating common electrode 11 is formed on the upper surface of the heat generating common conductor pattern 11 by printing silver paste or the like.
- Bonding pads 12a were formed at the ends of the individual heating electrodes 12. This makes it easy to connect to the driver IC 6 by wire bonding.
- the heating means 16 preferably has the same configuration as a thermal print head used in a conventional thermal facsimile. In this case, the manufacturing process of the existing thermal print head can be followed, and the discharge control device 7 can be manufactured at low cost by diverting the manufacturing device.
- the heating element 13a of the heating part 13 is formed in a strip shape, the heating comb electrodes 11a and the heating individual electrodes 12 are alternately arranged, and one heating individual electrode 12 at each center is provided. Between the heat generating comb electrodes 11a on both sides of the discharge electrode 5a, and selectively generate heat at any part of the heating element 13a corresponding to the position of the discharge generating part 15 of each discharge electrode 5a.
- the force used to heat 5a is not limited to this, and any structure that can selectively heat the discharge generating portion 15 of each discharge electrode 5a is acceptable.
- the flexible thin film 14 is formed by printing a thin film resin such as polyetherimide.
- the flexible thin film 14 only needs to be able to protect and insulate the heating common electrode l lb, the heating individual electrode 12, the heating element 13a, etc., but efficiently transfer the heat of the heating element 13a to the discharge electrode 5a.
- Those having high thermal conductivity that can be used are preferably used.
- the flexible thin film 14 may be formed by applying a resin solution having heat resistance and insulation resistance, such as polyimide galamide, by screen printing or the like, or a thin film sheet formed by the same resin. Cover and form.
- a plurality of discharge electrodes 5 a facing the heat generating individual electrodes 12 of the heating means 16 and a common electrode 5 b connecting them are formed on the flexible thin film 14.
- a metal such as gold, silver, copper, aluminum, or the like, which is formed by vapor deposition or sputtering printing and then etched to form a pattern is suitably used.
- a conductive material such as carbon may be used.
- the discharge electrode 5a is formed in a substantially rectangular shape in the present embodiment, it can be formed in a trapezoidal shape, a shell shape, a semicircular shape, or a combination thereof. Further, since the discharge generating portion 15 of the discharge electrode 5a has a large amount of discharge from the periphery of the edge, a plurality of uneven portions are formed on the outer peripheral edge portion of the discharge electrode 5a so that the peripheral length of the periphery of the discharge electrode 5a is increased, thereby generating discharge. Efficiency can be improved. As a result, the amount of discharge from the discharge generator 15 increases, and the amount of ion irradiation and light emission intensity can be increased, so that the energy saving property of the discharge control device 15 is excellent. In addition, since the voltage applied to the discharge electrode 5a can be set small, the long life of the discharge electrode 5a Also excellent.
- FIG. 8 (a) is a schematic plan view showing a first modified example of the head substrate of the heat-discharge type print head according to Embodiment 1, and FIG. 8 (b) is a CC line arrow in FIG. 8 (a).
- FIG. 8 the first modification of the head substrate in the first embodiment is different from the first embodiment in that the head substrate 4a has heat resistance and insulation covered on the surface of the discharge part 5.
- the flexible coating film 17 is provided, and the flexible coating film 17 has a substantially circular opening 17a at a position corresponding to the discharge generating portion 15 (near the position of the heating element 13a) of each discharge electrode 5a.
- the flexible coating film 17 was formed in the same manner as the flexible thin film 14 described above. Instead of forming a plurality of independent openings 17a, a long hole-like opening extending over the plurality of discharge electrodes 5a may be formed.
- FIG. 9 is a schematic cross-sectional view showing a second modification of the head substrate of the heat-discharge type print head.
- the second modification of the head substrate in the first embodiment is different from the first modification in that a plurality of uneven portions 17b are formed on the surface of the flexible coating film 17 of the head substrate 4b. Is a point.
- the surface distance of the flexible coating film 17 can be extended and the surface resistance can be increased, and leakage from the discharge generating part 15 of the discharge electrode 5a to the surroundings can be easily prevented.
- the uneven portion 17b on the surface of the flexible coating film 17 can be easily formed by screen printing or the like. Alternatively, an uneven portion may be formed on the surface of the flexible coating film 17 using the same material as the insulating film 14a.
- Fig. 10 (a) is a schematic plan view showing a third modification of the head substrate of the heat-discharge type print head according to Embodiment 1
- Fig. 10 (b) is a diagram of D in Fig. 10 (a).
- the third modification of the head substrate in the first embodiment is different from the first embodiment in that the end force on the heating element 13a side of the discharge electrode 5a of the head substrate 4c is also separated in the horizontal direction.
- the point that the induction electrode 18 is formed on the insulating film 14a, and the flexible thin film 19 and the insulating film 19a that cover the induction electrode 18 are formed between the insulating film 14a and the discharge part 5. is there.
- the flexible thin film 19 and the insulating film 19a are the same as the flexible thin film 14 and the insulating film 14a described above.
- the induction electrode 18 was formed in a strip shape on the insulating film 14a and grounded.
- the gap between the discharge electrode 5a of the discharge part 5 and the induction electrode 18 can be kept constant at all times, and by applying a voltage between the discharge electrode 5a and the induction electrode 18, a discharge can be reliably generated.
- the discharge is generated by being pulled by the induction electrode 18, but by grounding the irradiated object side such as a recording medium, the ions are irradiated to the irradiated object in the same direction as when the induction electrode 18 is not provided. .
- FIG. 11 (a) is a schematic side view showing a first modification of the heat-discharge type print head according to Embodiment 1
- FIG. 11 (b) is a first side view of the heat-discharge type print head according to Embodiment 1. It is a principal part schematic perspective view which shows the modification.
- the first modification of the heat-discharge type print head in the first embodiment is different from that in the first embodiment in that the discharge generating portion 15 of the discharge electrode 5a is inclined to the heat sink 2. This is a point that is an edge type head arranged on the edge 3b of the head.
- the driver IC 6 and the discharge electrode 5a are disposed at an obtuse angle.
- the recording medium can be conveyed in a straight line rather than being bent as described above, and can be suitably used for a horizontal printer.
- the discharge electrode 5a is arranged in an edge type, the heat discharge type print head lb can be arranged without being bulky in the height direction, and it corresponds to electrostatic latent image carriers having various shapes. Can be versatile.
- FIG. 12 (a) is a schematic side view showing a second modification of the heat discharge type print head in the first embodiment
- FIG. 12 (b) is a heat discharge type print head in the first embodiment.
- Second It is a principal part model perspective view which shows a modification.
- the second modification of the heating discharge type print head in the first embodiment is different from the first embodiment in that the discharge generating portion 15 of the discharge electrode 5a protrudes from the surface of the heat sink 2 and is loose.
- This is a raised head that is arranged to protrude from the driver IC 6 on the raised surface of the raised portion 3c formed in a hill shape.
- the electrostatic latent image carrier or recording medium and the driver IC6 or IC cover 9 It is possible to reduce the bulkiness in the height direction without causing interference, and it is excellent in space saving.
- the head substrate 4 Since the thickness of the flexible substrate 10 and the flexible thin film 14 of the head substrate 4 (4a, 4b, 4c) is extremely thin, for example, several ⁇ m to several tens of ⁇ m, the head substrate 4 ( The total thickness of 4a, 4b, and 4c) can be reduced to a few tens of ⁇ m to several hundreds of ⁇ m and can be made extremely thin. Since the head substrate 4 (4a, 4b, 4c) is naturally flexible, the head substrate 4 (4a, 4b, 4c) is bent or bent in accordance with the shape of the end surface portion 3a, the edge portion 3b, and the raised portion 3c of the heat sink 2 from the planar state.
- FIG. 13 is a diagram showing an ion irradiation method of the heat-discharge type print head in Embodiment 1 of the present invention.
- a discharge control voltage to the discharge electrode 5a (a voltage range in which discharge does not occur just by application! /, But discharge occurs when heated) is applied to the high-voltage substrate connected to the common electrode 5b of the discharge part 5 Start with 9a (see Figure 1).
- the AC voltage and DC voltage applied to the discharge electrode 5a (common electrode 5b) of the discharge unit 5 is a force that can be used in various combinations.
- the discharge electrode 5a of the discharge unit 5 is, for example, AC550Vpp (triangular wave) A voltage of -700V was superimposed on the DC bias and applied. The AC550Vpp voltage was superimposed to obtain discharge stability.
- the heat generating part 13 is controlled by the driver IC 6 to generate the heat generating element 13a.
- the driver IC 6 controls the driver IC 6 to generate the heat generating element 13a.
- Thermoelectrons are emitted from the discharge generating portion 15 of the selectively heated discharge electrode 5a at an applied voltage in the range of the discharge control voltage, and discharge occurs as shown by the arrows in FIGS.
- an electrostatic force is applied to the electrostatic latent image carrier and the recording medium.
- ions are irradiated.
- An electrostatic latent image is formed on the surface of the electrostatic latent image carrier irradiated with ions.
- an electrostatic latent image can be formed or an image can be formed by an oxidation-reduction reaction.
- An image can also be formed on a recording medium that reacts to light emission such as ultraviolet rays and visible rays.
- the value of the discharge control voltage can be selected as appropriate in combination with the heating temperature by the heating element 13a.
- the heating element 13a was heated at a low voltage of 24V, and the driver IC 6 used as a switch for generating heat from the heating element 13a was a 5V drive with a low withstand voltage.
- a high voltage substrate 9 a is disposed on the back surface of the IC cover 9 and is electrically connected to the common electrode 5 b of the discharging unit 5.
- the electrical wiring for applying the discharge control voltage can be shortened, and the high-voltage board 9a can be handled integrally with the thermal discharge type print head la.
- the thermal discharge type print head la and the high-voltage board 9a can be moved together, which makes it difficult to apply a load to the electrical wiring. Generation can be reduced.
- the arrangement position of the high-voltage substrate 9a is not limited to the present embodiment, and it is sufficient that the discharge control voltage can be applied to the common electrode 5b of the discharge section 5. Also, heat discharge type mark In the character heads lb and lc, the high voltage substrate 9a (see FIG. 1) is not shown, but can be provided in the same manner as in the first embodiment.
- the heat-discharge type print head according to Embodiment 1 has the following effects.
- the flexible substrate 4 (4a, 4b, 4c) on which the discharge devices such as the heat generating portion 13 and the discharge portion 5 are formed can be formed into a desired shape, so that the flexible substrate 4 (4a, 4b, 4c) If the flexible substrate 4 (4a, 4b, 4c) is processed into a desired shape after forming a discharge device by a method that is technically easy, the desired shape (previously advanced technology has been Therefore, it is excellent in productivity.
- the discharge electrode 5a to which the discharge control voltage is applied can be heated and controlled by the heating element 13a insulated by the flexible thin film 14 and the insulating film 14a, and thermoelectrons are emitted from the heated discharge electrode 5a.
- the amount of ions generated can be controlled, and recording can be performed on a dedicated recording medium such as an electrostatic development type digital paper.
- the flexible thin film 14 covering the heat generating part 13 has heat resistance and insulation, it is connected to the heat generating element 13a and the heat generating element 13a that are not thermally deformed by the heat generated by the heat generating element 13a.
- the electrode can be protected to ensure insulation from the discharge electrode 5a, and the discharge electrode 5a can be heated.
- a heat-discharge type print head according to Embodiment 2 of the present invention will be described below with reference to the drawings.
- FIG. 14 (a) is a schematic side view showing a heating / discharging print head in the second embodiment
- FIG. 14 (b) is a schematic perspective view of a main part showing the heating / discharging print head in the second embodiment.
- the heating discharge type print head Id in the second embodiment is different from the first embodiment in that the discharge electrode 5a is arranged near the lowermost part of the heat sink 2 and is the same as the discharge needle of the electrostatic plotter.
- it is a vertical discharge type that corresponds to a horizontal printer type that is arranged perpendicular to the recording medium.
- the discharge part 5 can be generated in a direction substantially perpendicular to the surface of the discharge electrode 5a simply by placing the discharge part 5 at the lowermost part (tip) of the surface of the heat sink 2, the mass production of the heat discharge type print head Id is improved. It is excellent and can be suitably used as a horizontal printer compatible type.
- FIG. 15 (a) is a developed plan view of the main part of the head substrate of the heat-discharge type print head according to the second embodiment
- FIG. 15 (b) is a cross-sectional view taken along line EE in FIG. 15 (a).
- the head substrate 4d of the heat discharge type print head in the second embodiment is different from the head substrate 4 of the heat discharge type print head in the first embodiment on the lowermost surface (tip) side of the discharge electrode 5a.
- the area where the discharge is generated is located at the lower part of the discharge generator 15 and the surrounding area is covered with a flexible thin film 14 similar to the flexible thin film 14 and the flexible coating film 17 without obstructing the downward irradiation of ions. It is.
- the method for manufacturing the head substrate 4d of the heat-discharge type print head in the second embodiment is the same as that in the first embodiment, and the description thereof is omitted.
- the heating and discharging type print head in the second embodiment is different from that in the first embodiment only in the ion irradiation direction, and the driving method is the same as that in the first embodiment, so that the description thereof is omitted.
- the heat-discharge type print head according to the second embodiment has the following functions in addition to the functions of the first embodiment.
- a wide area from the discharge electrode 5a of the discharge part 5 is covered by covering with the flexible thin film 20 leaving a directivity part downward from the discharge generation part 15 located on the lowermost surface (tip) side of the discharge electrode 5a. Discharge can be prevented, and discharge can be efficiently generated in a direction substantially perpendicular to the surface of the discharge electrode 5a.
- a heat-discharge type print head according to Embodiment 3 of the present invention will be described below with reference to the drawings.
- FIG. 16 is a plan development view of the main part of the head substrate of the heat-discharge type print head according to the third embodiment.
- FIG. 17 (a) is a cross-sectional view taken along the line F—F in FIG. Is G-G in Fig. 16.
- FIG. 17 (a) is a cross-sectional view taken along the line F—F in FIG. Is G-G in Fig. 16.
- the head substrate 4e of the heat discharge type print head in the third embodiment is different from the first embodiment in that the discharge is performed on one surface side of both surfaces of the flexible substrate 10 via the insulating film 10a.
- the discharge portion 5 having the electrode 5a is formed, and the heat generating portion 13 for heating the discharge electrode 5a is formed on the other surface side.
- the manufacturing method of the head substrate 4e of the heat discharge type print head in the third embodiment is different from the first embodiment in that the discharge part 5 and the heat generating part 13 are formed on the front and back of the flexible substrate 10, Since each process is the same as that of Embodiment 1, description is abbreviate
- the force insulating film 10a in which the insulating film 10a similar to the insulating film 14a described above is formed only on the upper surface of the flexible substrate 10 is provided on at least one surface of both surfaces of the flexible substrate 10. What is necessary is just to form. Thereby, the discharge part 5 and the heat generating part 13 can be reliably insulated. Further, in the double-sided laminated head substrate 4e, when the discharge part 5 and the heat generating part 13 are formed on different surfaces of the flexible substrate 10, respectively, either may be formed first.
- FIG. 18 (a) is a schematic plan view showing a first modified example of the head substrate of the heat-discharge type print head according to Embodiment 3, and FIG. 18 (b) is an H—H line in FIG. 18 (a).
- FIG. 18 (a) is a schematic plan view showing a first modified example of the head substrate of the heat-discharge type print head according to Embodiment 3, and FIG. 18 (b) is an H—H line in FIG. 18 (a).
- FIG. 18 (b) is an H—H line in FIG. 18 (a).
- the first modification of the head substrate in the third embodiment differs from the third embodiment in that the head substrate 4f has heat resistance and insulation covered on the surface of the discharge part 5.
- the flexible coating film 17 is provided, and the flexible coating film 17 has a substantially circular opening 17a at a position corresponding to the discharge generating portion 15 (near the position of the heating element 13a) of each discharge electrode 5a.
- the flexible coating film 17 was formed in the same manner as the flexible thin film 14 described above. Instead of forming a plurality of independent openings 17a, a long hole-like opening extending over the plurality of discharge electrodes 5a may be formed.
- the gap between the discharge generating part 15 of the discharge electrode 5a and the recording medium or the like disposed oppositely The gap can be kept constant, preventing contact between the discharge electrode 5a and the recording medium.
- the discharge from the discharge generator 15 can be stabilized.
- FIG. 19 is a schematic cross-sectional view showing a second modification of the head substrate of the heat-discharge type print head according to the third embodiment.
- the second modification of the head substrate in the third embodiment is different from the first modification in that a plurality of uneven portions 17b are formed on the surface of the flexible coating film 17 of the head substrate 4g. Is a point.
- the surface distance of the flexible coating film 17 can be extended and the surface resistance can be increased, and leakage from the discharge generating part 15 of the discharge electrode 5a to the surroundings can be easily prevented.
- the uneven portion 17b on the surface of the flexible coating film 17 can be easily formed by screen printing or the like. Or, using the same material as the insulating film 10a,
- Concave and convex portions may be formed on the surface of 17.
- FIG. 20 (a) is a schematic plan view showing a third modification of the head substrate of the heat-discharge type print head according to the third embodiment
- FIG. 20 (b) is a diagram of FIG. 20 (a) II.
- the third modification of the head substrate in the third embodiment is different from the third embodiment in FIG. 20 in that the end of the discharge electrode 5a of the head substrate 4h on the heating element 13a side
- the force is also separated horizontally, and the induction electrode 18 is formed on the insulating film 10a, and the flexible thin film 19 and the insulating film 19a covering the induction electrode 18 are provided between the insulating film 10a and the discharge part 5. It is formed ⁇ ;.
- the induction electrode 18 was formed in a strip shape on the insulating film 14a and grounded.
- the gap between the discharge electrode 5a of the discharge part 5 and the induction electrode 18 can be kept constant at all times, and by applying a voltage between the discharge electrode 5a and the induction electrode 18, a discharge can be reliably generated.
- the discharge is generated by being pulled by the induction electrode 18, but by grounding the irradiated object side such as a recording medium, the ions are irradiated to the irradiated object in the same direction as when the induction electrode 18 is not provided. .
- the head substrate 4e (4f, 4g, 4h) is rich in flexibility, it is flat like the head substrate 4 (4a, 4b, 4c) of the heating discharge type print head in the first embodiment. From the state, heat sink 2 can be bent or bent according to the shape of end face 3a, edge 3b, raised part 3c, etc. It can be easily processed (deformed), and the same heat discharge type print head la, lb, lc as in the first embodiment can be obtained.
- the heat-discharge type print head according to the third embodiment has the following functions in addition to the functions of the first embodiment.
- the flexible substrate 10 has heat resistance and insulation, it is not thermally deformed by the heat generated by the heating element 13a, and the electrodes connected to the heating element 13a and the heating element 13a are protected and discharged. Insulation with the electrode 5a can be ensured, and the discharge electrode 5a can be heated.
- the high temperature heat generating part 13 can be prevented from being exposed, and insulation between the heat generating part 13 and the outside can be ensured, resulting in excellent safety.
- a heat-discharge type print head according to Embodiment 4 of the present invention will be described below with reference to the drawings.
- FIG. 21 is a configuration diagram of the heat discharge print head of the discharge device separation type according to the fourth embodiment
- FIG. 22 (a) is a head substrate of the heat discharge print head of the discharge device separation type according to the fourth embodiment.
- FIG. 22 (b) is a schematic cross-sectional view showing a heat generating unit of the head substrate of the discharge device separated type heat-discharge type print head in Embodiment 4
- FIG. 22 (c) is a schematic cross-sectional view showing the head substrate of the discharge device separated type heat discharge type print head according to the fourth embodiment
- FIG. 22 (d) shows the discharge device separated type heat discharge according to the fourth embodiment.
- FIG. 6 is a schematic cross-sectional view showing a modification of the head substrate of the mold print head.
- the heating and discharging type print head in the fourth embodiment is different from the first to third embodiments in that the discharge part 5 and the heat generating part 13 are separately formed on the flexible substrate 10.
- the discharge unit 21 and the heat generating unit 22 are used, and the discharge substrate 21 is combined with the heat generating unit 22 to form the head substrates 4i and 4j.
- the manufacturing power of the head unit discharge unit 21 and the heat generation unit 22 of the heat discharge type print head according to the fourth embodiment is different from that of the third embodiment except for separate flexible substrates.
- the discharge portion 5 and the heat generating portion 13 are formed in FIG. 10. Since each step is the same as that of the third embodiment, the description thereof is omitted.
- the discharge unit 21 and the heat generating unit 22 may be bonded together to form the head substrate 4i, or the discharge unit 21 may be discharged as shown in FIG. 22 (d).
- the heat generating part 13 of the unit 5 and the heat generating unit 22 may be back to back, and the flexible substrates 10 may be bonded together to form the head substrate 4j.
- the discharge unit 21 and the heat generating unit 22 are fixed with jigs for fixing the longitudinal ends and outer peripheral portions of the discharge unit 21 and the heat generating unit 22 from above and below instead of being bonded together with a heat-resistant adhesive. It is good also as attachment or detachment by pinching and fixing.
- the fixing jig may be fixed by a detachable fixing means such as pin fitting or screwing. Positioning of the discharge unit 21 and the heat generation unit 22 can be performed by pin fitting with a pin protruding from one of the discharge unit 21 and the heat generation unit 22 and a fitting hole formed in the other.
- the flexible substrate 10 of both the discharge unit 21 and the heat generating unit 22 may be provided with fitting holes, and both may be positioned and fixed using pins of a fixing jig.
- the heat generating unit 22 has a function of heating the discharge unit 21, and may be formed on a hard substrate such as ceramic instead of being formed on the flexible substrate 10 having flexibility.
- an existing thermal print head can be used as the heat generating unit 22.
- a flexible cover film 17 having an opening 17a is formed on the surface of the discharge portion 5 as in the first modification of the head substrate of the heat-discharge type print head in the first and third embodiments.
- a plurality of uneven portions are formed on the surface of the flexible coating film 17. You can do it, or you don't have to provide the flexible coating 17.
- the heat-discharge type print head according to the fourth embodiment has the following actions in addition to the actions of the first to third embodiments.
- discharge unit 21 and the heat generating unit 22 can be manufactured as separate parts, the respective manufacturing processes of the discharge unit 21 and the heat generating unit 22 can be simplified, yield can be improved, and mass productivity is excellent.
- the discharge unit 21 and the heat generating unit 22 are detachable, they can be easily replaced or repaired if any one of them fails, especially when the discharge electrode 5a is worn. Since the discharge unit 21 can be replaced, the running cost of the discharge control device 7 can be reduced, and the maintenance and resource saving are excellent. In particular, a remarkable effect can be obtained when an existing thermal print head is used as the heating unit 22.
- the substrate on which the discharge device is formed can be processed into a desired shape. It is possible to provide a heat-discharge-type print head with excellent assembly workability, design flexibility, mass productivity, and practicality that can overcome the restrictions on substrate and discharge device formation technology. It can be suitably used as a compatible print head
Landscapes
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Electrophotography Using Other Than Carlson'S Method (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006544881A JP4575922B2 (ja) | 2004-11-19 | 2005-11-07 | 加熱放電型印字ヘッド及びそれに用いる放電ユニット |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-336236 | 2004-11-19 | ||
| JP2004336236 | 2004-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006054454A1 true WO2006054454A1 (ja) | 2006-05-26 |
Family
ID=36406999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/020389 Ceased WO2006054454A1 (ja) | 2004-11-19 | 2005-11-07 | 加熱放電型印字ヘッド |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4575922B2 (ja) |
| WO (1) | WO2006054454A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008307788A (ja) * | 2007-06-14 | 2008-12-25 | Fukuoka Technoken Kogyo:Kk | イオン発生制御方法と加熱放電型印字ヘッド及びそれを備えた画像形成装置 |
| US8193891B2 (en) | 2008-02-20 | 2012-06-05 | Koninklijke Philips Electronics N.V. | High voltage transformer with space-saving primary windings |
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| JPH0872292A (ja) * | 1994-09-09 | 1996-03-19 | Alps Electric Co Ltd | イオン書込みヘッド |
| JP2000326546A (ja) * | 1999-05-18 | 2000-11-28 | Hitachi Ltd | 静電記録装置 |
| JP2003326756A (ja) * | 2002-05-13 | 2003-11-19 | Fukuoka Technoken Kogyo:Kk | イオン発生装置 |
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2005
- 2005-11-07 WO PCT/JP2005/020389 patent/WO2006054454A1/ja not_active Ceased
- 2005-11-07 JP JP2006544881A patent/JP4575922B2/ja not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02386A (ja) * | 1989-01-31 | 1990-01-05 | Toshiba Corp | 発光ダイオードアレイ |
| JPH0872292A (ja) * | 1994-09-09 | 1996-03-19 | Alps Electric Co Ltd | イオン書込みヘッド |
| JP2000326546A (ja) * | 1999-05-18 | 2000-11-28 | Hitachi Ltd | 静電記録装置 |
| JP2003326756A (ja) * | 2002-05-13 | 2003-11-19 | Fukuoka Technoken Kogyo:Kk | イオン発生装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008307788A (ja) * | 2007-06-14 | 2008-12-25 | Fukuoka Technoken Kogyo:Kk | イオン発生制御方法と加熱放電型印字ヘッド及びそれを備えた画像形成装置 |
| US8193891B2 (en) | 2008-02-20 | 2012-06-05 | Koninklijke Philips Electronics N.V. | High voltage transformer with space-saving primary windings |
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| Publication number | Publication date |
|---|---|
| JP4575922B2 (ja) | 2010-11-04 |
| JPWO2006054454A1 (ja) | 2008-08-07 |
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