JP2003054036A - Printing head for optical printer and printing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the printing efficiency of a light emitting element assembled in a printing head of an optical printer. SOLUTION: A printing head 76 comprises a carriage 70, a head substrate 77 with LEDs of different colors disposed, a panel shade 71, and an aperture 40. Reflection mirrors 84, 86 are mounted on the side facing the longer side as the light emitting surface of the LED 77R, LED 77B, and LED 77G disposed on the head substrate 77. The reflection mirrors 84, 86 have reflection surfaces 84a, 86a formed so as to collect the light outputted sideward from a light emitting part 82 to an exposing hole 40e of the aperture 40. Thereby, a direct light from the light emitting part 82 and a reflected light reflected by the reflection mirrors 84, 86 are synthesized at the exposing hole 40e so that the light amount to be directed to a printing medium 90 can efficiently be increased so as to improve the printing efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a print head and a printing apparatus for an optical printer, and more particularly to a print head and a printing apparatus for an optical printer configured to expose a medium having a photoconductor to light of a specific wavelength to develop a color. Regarding

[0002]

2. Description of the Related Art Conventionally, as one of methods for producing a color photograph or a color print, a method of exposing a photosensitive paper to form an image such as a picture or a character is known. Also,
As a photosensitive paper, a photosensitive paper called a color medium (hereinafter, simply referred to as “printing medium”) has been developed (for example, see Japanese Patent Laid-Open No. 10-76706). The printing medium uses three types of cyan, magenta, and yellow microcapsules (hereinafter referred to as "Siris") containing different color-developing substances and photoinitiators as photosensitive materials. This printing medium is coated with a layer of photosensitive material that has a myriad of very small squirrels on the surface of a thin polyester support, which are then exposed to light to cure the siris to a specific color. After activating only Siris, it is crushed by applying pressure and developed, so that only an image of a predetermined color can be formed.

Next, the operation in the case of performing color printing on the above-mentioned print medium by a color printer (hereinafter, simply referred to as "printing device"), that is, the principle of coloring will be briefly described.

First, the print medium is irradiated with exposure light having a wavelength suitable for an image to be formed by using a print head for exposure. R (red) color, G for print head
Light emitting elements including light emitting diodes of (green) color and B (blue) color (hereinafter, referred to as “LED”) are provided, and as shown in FIG. 14, the spectral characteristics depending on the characteristics of the light emitting elements are provided. R color is 630 nm, G color is 53
The amount of light has a peak at a wavelength of 0 nm and B color at 470 nm.

The exposure light cures the squirrel containing therein a coloring substance (rucodai) having a complementary color relationship with the wavelength of the exposing light, and inactivates the coloring substance contained in the squirrel. For example, assume that the exposure light is red light.

In this case, since the complementary color of the red light is the cyan light, the thyris containing the cyan coloring material (hereinafter,
(Called "Cyan squirrel") is inactivated.

The area exposed by the print head is fed by the paper feed roller in the paper feed direction, that is, the sub-scanning direction,
The next area is fed to the print head. The paper feed roller is rotationally driven in the forward direction by the paper feed mechanism.

On the other hand, in the exposed area, the siris is crushed by the pressure roller which is moved along with the print head along the moving direction of the carriage, that is, the main scanning direction. Magenta and yellow squirrels that are active states other than passivated by exposure light, for example, red light, are crushed by a pressure roller, and the color-developing substance is chemically combined with an image-receiving layer formed on transparent polyester. Cause a reaction,
It develops red, which is the desired color.

Further, in order to accelerate the color development, the printing medium is heated by a heater using a heating element so that the printing medium can be output from the printing device in a state where the color development is almost completed. From the above-mentioned coloring principle, when the exposure light is red light and green light,
It can be easily understood that the color develops to yellow.

As mentioned above, printing media (printing paper)
Is sent out in the paper feeding direction by the paper feeding roller that is rotationally driven by the motor by the paper feeding mechanism.
The paper feeding operation by the paper feeding mechanism needs to be interlocked with an operation (hereinafter, referred to as "print head operation") in which a carriage having a print head for exposure moves along a carriage movement direction.

The carriage is movable within a range on both sides. Then, when the carriage reaches at least one of both sides or immediately before, the paper feed mechanism starts its operation to rotate the paper feed roller by a predetermined angle in the forward direction to move the paper. Move a fixed amount in the paper feed direction.

FIG. 15 is an enlarged vertical sectional view showing a conventional print head for an optical printer. As shown in FIG. 15, the print head 1 has LEDs 2 of each color mounted on a head substrate 3. The LED 2 has a configuration in which a rectangular light emitting portion 2a is molded by a case 2b. The print head 1 is provided with a panel shade 5 having an opening 4 for accommodating the LEDs 2, and an aperture 6 attached so as to overlap the lower surface of the panel shade 5.

An exposure hole (also referred to as a "pinhole") 7 is opened in the aperture 6 at a position facing each LED 2. Therefore, the aperture 6 has
The lights of three colors are prevented from overlapping each other by narrowing the light so that only the light from the light passes through the exposure hole 7 and is applied to the printing medium 8.

For this reason, the print head 1 is provided with the panel shade 5 and the aperture 6 so that the light of each color is not simultaneously irradiated, and the coloring accuracy of the print medium 8 is secured.

[0015]

However, conventionally, the light from the LEDs of each three colors is narrowed down by the aperture to prevent the light of each color from interfering with each other. Although the light 9a emitted from the light emitting portion 2a toward the exposure hole 7 is applied to the printing medium, since the light emitting portion of the LED is a surface light source instead of a point light source, the light 9b emitted to the side of the LED 2 is The amount of light that does not pass through the exposure hole 7 and is applied to the printing medium 8 decreases. Therefore, conventionally, there is a problem that it is difficult to improve the printing efficiency because a part of the amount of light emitted from the LED 2 is not applied to the printing medium 8.

Further, in the print head for an optical printer, a plurality of LEDs 2 are arranged to secure the light amount of each three colors. To shorten the printing time, the number of LEDs 2 is increased to increase the light amount to the printing medium 8. It is necessary to increase the number, and there is a problem that the cost increases.

Further, Japanese Patent Laid-Open No. 10-76706 mentioned above describes that the light emitted to the side of the LED is reflected by the inner wall of the storage opening of the panel shade, but it is simply made of a metal surface. It reflects light on the wall surface, and does not focus the reflected light on the exposure hole of the aperture. Therefore, there is a problem that it is difficult to improve the printing efficiency even with the above publications.

Therefore, it is an object of the present invention to provide a print head and a printing apparatus for an optical printer which solve the above problems.

[0019]

In order to solve the above problems, the present invention has the following features. The invention according to claim 1 is a head substrate on which light emitting elements corresponding to each color are arranged, a panel shade having a hole provided on the head substrate for accommodating the light emitting elements, and an exposure for transmitting light from the light emitting elements. In a print head for an optical printer including an aperture having a hole, a reflection mirror having a reflecting surface formed so as to focus the light emitted to the side of the light emitting element on the exposure hole is provided. It is possible to improve the printing efficiency by increasing the amount of light applied to the printing medium without increasing the number of light emitting elements.

According to a second aspect of the present invention, the reflecting mirror has a concave reflecting surface for reflecting the light emitted to the side of the light emitting element at an angle of passing through the exposure hole. It is possible to improve the printing efficiency by increasing the amount of light applied to the printing medium without increasing the amount of light.

Further, according to the third aspect of the present invention, the reflection mirror is disposed on the side opposite to the light emitting side of the light emitting element, so that the amount of light applied to the printing medium is efficiently increased and the printing efficiency is improved. It can be configured to.

According to a fourth aspect of the present invention, there is provided a printing apparatus configured to expose a medium having a photoconductor to light of a specific wavelength to develop a color by using a print head for an optical printer. The same action and effect as in 3 are obtained.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an embodiment of a printing apparatus using a print head for an optical printer according to the present invention.

As shown in FIG. 1, the printing device 50 includes
An upper case 51 that fits together to form an accommodation space inside
A lower case 55, a drive mechanism 60 housed on the bottom plate of the lower case 55, and a control board 53 for controlling the drive mechanism 60.
And a removable media case 52 accommodating a plurality of sheet-shaped print media.

FIG. 2 is an exploded perspective view showing the structure of the drive mechanism of the printing apparatus shown in FIG. FIG. 3 is an overall configuration diagram of the drive mechanism of FIG. As shown in FIGS. 2 and 3, a boat-shaped frame (chassis) 61 is provided with a carriage 70 for moving and operating a print head 76 for exposing the taken-out print medium, and for developing and heating the medium. A drive motor 62 for driving each part, a pickup roller 63 for taking out one print medium to be exposed from the media case 52 shown in FIG. 1, a feed roller 65c and the like are mounted.

The carriage 70 has a print head 76 mounted therein and houses a pressure roller 75 (not visible in FIG. 3) for crushing the photosensitive material of the print medium. A fixing metal fitting (not shown) is provided at the tip of the carriage 70, and the encoder board 74 is attached to the upper surface shown in the drawing by the metal fitting. Further, the carriage 70 accommodates a guide protrusion 78 having a protrusion that fits into the spiral groove 72 a provided on the head drive shaft 72. The guide protrusion 78 is rotatably supported by a fitting 79.

The head drive shaft 72 is provided with a spiral groove 72a, and when the drive shaft 72 rotates, a guide protrusion (not shown) of the carriage 70 fitted into the spiral groove 72a is formed in the spiral groove 72a. Move along. This allows
The carriage 70 is guided by the guide rollers 66 and 73 and reciprocates in the axial direction.

It should be noted that both ends of the shafts of the respective parts are projected from the chassis 61, and gears are respectively provided to drive the respective shafts. It constitutes a drive transmission mechanism for obtaining a desired rotation.

FIG. 4 is an exploded perspective view mainly showing the heating mechanism. Referring to FIG. 4 together with FIG. 2 and FIG. 3, the heating mechanism promotes color formation after crushing the unexposed color former of the print medium between the pressing shaft 100 and the pressure roller 75 after exposure. A heater 92 for heating is provided for this purpose. The heater 92 is made of an L-shaped metal piece provided with a heating element (not shown), and is attached near the medium discharge side by a heater fixing portion 91, attachment members 93, 94, 95 and the like.

FIG. 5 is a perspective view of the carriage 70 as viewed from the lower surface side. As shown in FIG. 5, the print head 76
Is a head substrate 77 on which the carriage 70, the R color LED 77R, the B color LED 77B, and the G color LED 77G are arranged, the panel shade 71, and the aperture 40.
It consists of and.

The carriage 70 is provided with a pair of positioning pins 70c projecting (projecting upward in FIG. 5) on both sides toward one end (positioning toward the rear in FIG. 5). Further, a pair of carriage pins 70d for locking the aperture 40 is provided on each side of the carriage 70.

On the end face 40a of the aperture 40, an R-color LED 77R, a B-color LED 77B, and a G-color LED 77 are provided.
An exposure hole 40e for transmitting the light emitted from G is provided at a position facing the center of each LED 77R, LED 77B, LED 77G. The exposure hole 40e is
The size and shape of the print dot are set according to the size of the print dot.

Further, on both side surfaces 40b of the end surface 40a of the aperture 40, there are formed engagement holes 40d through which the carriage pin 70d is fitted and which engages with the carriage pin 70d. Further, both side surfaces 40 of the end surface 40a of the aperture 40
An insertion hole 40c into which the positioning pin 70c of the carriage 70 is inserted is provided in b. Further, notches are provided on the edge sides of the bent portions, which are the boundaries between the end surface 40a of the aperture 40 and the side surfaces, in order to facilitate bending, and the corner portions of each surface are rounded.

An LED input / output FPC 77f for electrically connecting to the head substrate 77 is provided on the position side of the head substrate 77. Further, on one surface of the head substrate 77, there are an R-color LED 77R, a B-color LED 77B, and a G-color LED 77.
Three Gs each (9 in total) are arranged side by side in the width direction of the print medium. In this embodiment, the LED
Although the 77R, the LED 77B, and the LED 77G are arranged three by three, the invention is not limited to this, and three or more may be arranged depending on the size of the printing medium.

The head substrate 77 has a pair of positioning holes 77c through which the positioning pins 70c of the carriage 70 are inserted.
Is provided. Further, each head substrate 77 has an L
Rectangular storage holes 71R, 71B, 7 are provided in the portions corresponding to the EDs 77R, 77G, 77B (9 locations in this embodiment).
A panel shade 71 having 1G is overlaid.

Further, the positioning pin 71 of the carriage 70 is inserted into the positioning hole 71c provided in the panel shade 71.
In addition to inserting c, the positioning pin 70c of the carriage 70 is inserted into the hole 40c provided in the aperture 40, and the hole portion 40d provided in the side plate of the aperture 40 is inserted.
Then, the carriage pin 70d is engaged to complete the head portion. In this way, the LED 77 on the head substrate 77
The R, LED 77B, and LED 77G are panel shades 71 held between the head substrate 77 and the aperture 40.
The housing holes 71R, 71B, 71G are assembled in a state of being housed.

FIG. 6 is an enlarged vertical sectional view showing the first embodiment of the present invention. FIG. 7 is an enlarged plan view showing the first embodiment of the present invention. As shown in FIGS. 6 and 7, LEDs 77R and LEDs 77 arranged on the head substrate 77
In each of the B and LED 77G, a rectangular light emitting portion 82 is housed inside a case 80. Further, the light emitting unit 82 is
For example, it is a rectangular chip formed of a PN junction diode of an intermetallic compound semiconductor such as gallium phosphide (GaP), and emits light as a rectangular surface light source by passing an electric current. In this embodiment, the short side of the rectangular light emitting portion 82 has a wiring portion called a bonding spot, and this portion does not emit light. Therefore, the long side of the light emitting portion 82 serves as a light emitting surface.

In addition, LED77R, LED77B, LE
D77G is a storage hole 71R of the panel shade 71,
It is housed in 71B and 71G, and is arranged so that its center faces the exposure hole 40e of the aperture 40.

LED77R, LED77B, LED77
Reflecting mirrors 84 and 86 are attached to the side facing the long side of G (the light emitting surface side of the light emitting portion 82). The reflection mirrors 84 and 86 are composed of LEDs 77R, LEDs 77B and L.
The storage holes 71 are located on the left and right sides of the ED77G.
It is fixed to the inner wall 87 of R, 71B, 71G. still,
As a method of fixing the reflection mirrors 84 and 86, the storage hole 71 is used.
It may be fixed to the inner wall 87 of R, 71B, 71G, or may be supported by the head substrate 77 or the aperture 40.

The reflection mirrors 84 and 86 allow the light emitted from the light emitting section 82 to the side (range of the angle α) to pass through the aperture 40.
Reflecting surface 8 formed so as to focus on the exposure hole 40e of
4a and 86a. The reflecting surfaces 84a and 86a are
It is formed in a concave surface that is concave in a hemispherical shape with a predetermined radius of curvature. In this embodiment, the reflecting surfaces 84a and 86a and the light emitting section 8 are provided.
The radius r of the Rowland circle 88 formed so that the light source position is located at the center of 2 and the center of the exposure hole 40e is located on the same circumference, and the reflecting surfaces 84a and 86 are curved with this radius r.
a is formed into a concave surface.

As a result, the light emitted laterally from the light emitting portion 82 is reflected by the reflecting surfaces 84a, 86 of the reflecting mirrors 84, 86.
The light is diffracted by a and reaches the center of the exposure hole 40e. As a result, the direct light from the light emitting portion 82 and the reflected light reflected by the reflecting mirrors 84 and 86 are combined in the exposure hole 40e,
The amount of light applied to the printing medium 90 can be efficiently increased.

Therefore, the reflecting mirrors 84 and 86 are connected to the light emitting section 8.
By arranging so as to face the long side of the second light emitting surface, it is possible to shorten the printing time for irradiating the printing medium 90 with light of each color to develop color and improve the printing efficiency. . Further, when the printing time is the same as the conventional one, the number of LEDs can be reduced by the increase in the amount of light and the manufacturing cost can be kept low.

The reflection mirrors 84 and 86 are rectangular LEDs 77R, 77B and 77G.
Since it is arranged at a position facing the narrower long side, the storage holes 71R, 71B, 71G can be attached compactly without enlarging.

FIG. 8 is an enlarged vertical sectional view showing a second embodiment of the present invention. FIG. 9 is an enlarged plan view showing a second embodiment of the present invention. In addition, in FIG. 8 and FIG.
The same parts as those in the embodiment are designated by the same reference numerals and the description thereof will be omitted. As shown in FIGS. 8 and 9, the reflection mirror 9
The reflecting surfaces 94a, 96a of 4, 96 are formed in the shape of a trapezoid.

The reflecting surfaces 94a and 96a are inclined surfaces 94a ₁ and 96a ₁ formed in a tapered shape and a circular flat surface 94a.
Since it is a combination with ₂ , 96a ₂ , the amount of light condensed on the exposure hole 40e is slightly lower than that of the first embodiment, but can be manufactured relatively easily. Therefore, processing the reflecting surface with the radius of curvature r of the Rowland circle 88 as in the first embodiment requires high processing cost, and therefore the reflecting mirrors 94, 9
Like the reflecting surfaces 94a and 96a of 6, the Roland circle 88
The manufacturing cost can be kept low by forming the trapezoidal shape having a curvature radius r of approx.

FIG. 10 is an enlarged view of the third embodiment of the present invention.
FIG. FIG. 11 is an enlarged view of the third embodiment of the present invention.
FIG. In addition, in FIG. 10 and FIG.
The same parts as those of the first and second embodiments are designated by the same reference numerals.
The description is omitted. As shown in FIGS. 10 and 11.
The reflecting surfaces 104a, 10 of the reflecting mirrors 104, 106.
6a is a plurality of planes 104a₁~ 104a_n, 106a
₁~ 106a _nPolygonal shape that combines (for example, eight sides)
Body or hexahedron, etc.)
It

Reflecting surface 104 of reflecting mirrors 104 and 106
a and 106a are a plurality of planes 104a _{1 to} 104a _n ,
Since the concave surface is formed by combining 106a _{1 to} 106a _n , the processing accuracy can be reduced as compared with the case where the reflecting surface is processed with the radius of curvature r of the Rowland circle 88 as in the first embodiment, and therefore the radius of curvature r of the Rowland circle 88 is r. The manufacturing cost can be reduced by forming the polygonal shape similar to the concave surface.

FIG. 12 is an enlarged vertical sectional view showing a fourth embodiment of the present invention. FIG. 13 is an enlarged plan view showing a fourth embodiment of the present invention. In addition, in FIG. 12 and FIG.
The same parts as those in the first to third embodiments are designated by the same reference numerals and the description thereof will be omitted. As shown in FIG. 12 and FIG. 13, the reflection mirrors 114 and 116 include LEDs 77R and LE.
It is formed so as to intervene between the side surfaces of the D77B and the LED 77G on the long side of the narrow width and the inner wall 87 of the storage holes 71R, 71B and 71G, and the surface areas of the reflecting surfaces 114a and 116a are the same as those of the first to third embodiments. It is formed larger than that of the embodiment.

Further, the reflecting surfaces 114a and 116a are formed as hemispherical concave surfaces, and are formed into a curved surface having a radius of curvature that can be accommodated in the Rowland circle or the accommodation holes 71R, 71B and 71G described above. There is.

The reflection mirrors 114 and 116 are the first to the first ones.
Since the reflecting surfaces 114a and 116a have a larger surface area than that of the third embodiment, the LEDs 77R and LE are correspondingly larger.
Most of the light radiated to the side of the D77B and the LED 77G can be focused on the exposure hole 40e, and the amount of light applied to the printing medium 90 can be increased.

Therefore, it is possible to shorten the printing time for irradiating the printing medium 90 with light of each color to develop the color and to improve the printing efficiency. Further, when the printing time is the same as the conventional one, the number of LEDs can be reduced by the increase in the amount of light and the manufacturing cost can be kept low.

The reflecting mirrors 114 and 116 have a larger installation space than those of the first to third embodiments, but
Sides of LED77R, LED77B, LED77G,
The size is set such that the storage holes 71R, 71B, 71G can be mounted in a vacant space between the inner walls 87, and the storage holes 71R, 71B, 71G do not need to be expanded.

Further, as a method of fixing the reflection mirrors 114 and 116, since they can be fixed to both the inner wall 87 and the head substrate 77 or only one of them, it is possible to select a fixing position.

In the above embodiment, the case where the reflecting surface of the reflecting mirror is formed in a hemispherical, trapezoidal or polygonal concave surface has been described as an example. However, the concave surface shape of the reflecting mirror is
For example, the reflecting surface of the reflecting mirror may be curved in a parabolic shape or may be formed in a conical shape.

In the above embodiment, gallium phosphide (Ga) is used.
Although a light emitting diode (LED) made of a PN junction diode made of an intermetallic compound semiconductor such as P) has been described as an example of the light emitting element, the present invention is not limited to this and can be applied to other light emitting elements. .

Further, in the above embodiment, the description has been given by using the configuration in which the LED 77R, the LED 77B, and the LED 77G are arranged in the exposure print head 76 by three, but the invention is not limited to this. For example, three LEDs for each color are used. It is needless to say that the present invention can be applied to a structure in which three or more LEDs are arranged or three or less LEDs for each color are arranged.

[0057]

As described above, according to the first aspect of the invention, since the reflecting mirror having the reflecting surface formed so as to collect the light emitted to the side of the light emitting element in the exposure hole is provided. The printing efficiency can be improved by increasing the amount of light applied to the printing medium without increasing the number of light emitting elements.
Therefore, it is possible to shorten the printing time for irradiating the printing medium with light of each color to develop the color, and to improve the printing speed and the printing efficiency. Further, when the printing time is the same as in the conventional case, the number of light emitting elements can be reduced by the increase in the amount of light, and the manufacturing cost can be kept low.

According to the second aspect of the invention, since the reflecting mirror has a concave reflecting surface for reflecting the light emitted to the side of the light emitting element at an angle of passing through the exposure hole, the light emitting element. It is possible to improve the printing efficiency by increasing the amount of light applied to the printing medium without increasing

According to the third aspect of the invention, since the reflection mirror is arranged on the side opposite to the light emitting side of the light emitting element, the amount of light applied to the printing medium is efficiently increased to improve the printing efficiency. It can be configured to improve.

Further, according to the invention described in claim 4, since it is a printing apparatus configured to expose a medium having a photoconductor to light of a specific wavelength by using a print head for an optical printer to develop color, The same actions and effects as those in Items 1 to 3 are obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a printing apparatus using a print head for an optical printer according to the present invention.

2 is an exploded perspective view showing a configuration of a drive mechanism of the printing apparatus shown in FIG.

FIG. 3 is an overall configuration diagram of the drive mechanism in FIG.

FIG. 4 is an exploded perspective view mainly showing a heating mechanism.

FIG. 5 is a perspective view of the carriage 70 as viewed from the lower surface side.

FIG. 6 is an enlarged vertical sectional view showing the first embodiment of the present invention.

FIG. 7 is an enlarged plan view showing the first embodiment of the present invention.

FIG. 8 is an enlarged vertical sectional view showing a second embodiment of the present invention.

FIG. 9 is an enlarged plan view showing a second embodiment of the present invention.

FIG. 10 is an enlarged vertical sectional view showing a third embodiment of the present invention.

FIG. 11 is an enlarged plan view showing a third embodiment of the present invention.

FIG. 12 is an enlarged vertical sectional view showing a fourth embodiment of the present invention.

FIG. 13 is an enlarged plan view showing a fourth embodiment of the present invention.

FIG. 14 is a graph showing the relationship between wavelength and energy of light emitted from LEDs for each color.

FIG. 15 is an enlarged vertical sectional view showing a conventional print head for an optical printer.

[Explanation of symbols]

40 Aperture 40e Exposure Hole 50 Printing Device 51 Upper Case 52 Media Case 53 Control Board 55 Lower Case 60 Drive Mechanism 61 Frame 62 Motor 63 Pickup Rollers 66, 73 Guide Roller 70 Carriage 71 Panel Shades 71R, 71B, 71G Storage Hole 72 Head Drive Axis 75 Pressure roller 76 Print head 77 Printed board 77R R color LED 77B B color LED 77G G color LED 80 Case 82 Light emitting part 84, 86, 94, 96, 104, 106, 114, 1
16 reflection mirrors 84a, 86a, 94a, 96a, 104a, 106
a, 114a, 116a Reflecting surface 87 Inner wall 88 Roland circle 90 Printing medium 92 Heater 100 Pressing shaft

Claims (4)

[Claims] 1. A head substrate on which light emitting elements corresponding to respective colors are arranged, a panel shade having a hole formed on the head substrate for accommodating the light emitting element, and an exposure hole for transmitting light from the light emitting element. And a reflection mirror having a reflection surface formed so as to focus the light emitted to the side of the light emitting element on the exposure hole. And print heads for optical printers. 2. The reflection mirror has a concave reflection surface that reflects the light emitted to the side of the light emitting element at an angle of passing through the exposure hole.
A print head for the optical printer described. 3. The print head for an optical printer according to claim 1, wherein the reflection mirror is arranged at a position facing a light emitting side of the light emitting element. 4. A printing apparatus configured to expose a medium having a photoconductor to light of a specific wavelength to develop color by using the print head for an optical printer according to any one of claims 1 to 3. .