JP2001309120A - Optical reader and image recorded provided with it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical reader where a CCD can be aligned to a lens with high precision. SOLUTION: A CCD casing 12 is dropped into a dropping hole 16a provided for a CCD casing support member 16, a light receiving face 12a is pressed into contact with a lock piece 16b provided for the CCD casing support member 16 and the CCD casing is fixed between the CCD casing support member 16 and a channel-shape elastic pressing piece 17. A bracket 18 to which the CCD casing support member 16 is screw-fastened and integrated is assembled for a lens holder 13 in a tilted way and aligned with respect to the lesn11 and the bracket is fixed. Thus, the CCD casing can be fixed to the CCD casing support member 16 while being pressed into contact with the CCD casing support member 16, and regulating the CCD casing support member 16 can align the CCD to the lens so as to attain highly precise alignment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lens and a CCD.
The present invention relates to an optical reading device using the same and an image recording device including the same.

[0002]

2. Description of the Related Art Conventionally, an optical unit used in a facsimile machine or a copying machine has a lens for condensing light reflected from an object to be optically read such as a document, and an electric signal for condensing the light condensed by the lens. CCD to convert to
A unit is provided. In the CCD unit, a reading element (hereinafter, referred to as a CCD) is directly soldered on a substrate, and the substrate is fixed to a base (case) of the unit (for example, Japanese Utility Model Application Laid-Open No. 63-106267).
issue).

In the CCD unit having the above structure, it is necessary to perform alignment between the lens and the CCD.
For the adjustment, a screw hole for attaching the CCD unit to the device body is formed with a size that allows play for the attachment screw, and the distance from the both ends in the longitudinal direction of the CCD to the lens is adjusted equally. Therefore, the substrate is tiltably provided so that the left and right ends of the substrate are moved back and forth with respect to the lens.

[0004]

However, in the CCD unit having the above-described structure, the CCD is soldered to the substrate via the plurality of pins.
It was difficult to solder so that the light receiving surface was parallel to the substrate. In the case where the parallel state with the substrate cannot be ensured, it is not easy to adjust the position by moving the substrate as described above because the CCD is tilted. If it is insufficient, there is a problem that the image quality is not stable.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an optical reading device capable of performing high-precision positioning with respect to a lens without being affected by a coupling state between a substrate and a CCD, and an optical reading device are provided. In order to realize an image recording device
In the present invention, an optical reading device having a lens system and a CCD unit disposed on the optical axis of the lens system, wherein the CCD unit is a CCD for performing photoelectric conversion,
CCD provided with an opening engaged with the front surface of the CCD
It has a bracket and a CCD bracket fixing member for fixing the CCD to the CCD bracket.

According to this, a part of the surface of the CCD is brought into contact with a portion around the opening of the CCD bracket while securing the light receiving range of the CCD, so that the CCD can be fixed to the CCD bracket. No, CC for lens
The alignment of D can be performed by adjusting the CCD bracket, not the substrate on which the CCD is soldered.

[0007] Further, the CCD bracket is provided with the CC
According to the provision of the CCD restricting portion formed so as to receive a part of the CCD so as to restrict the lateral displacement of D, the CCD can be mounted on the CCD bracket so as to be dropped into the CCD restricting portion. And the assembling work becomes easy.

[0008] Further, the CCD is integrally connected to a substrate, a notch provided on the substrate to expose a part of the back surface of the CCD, and a notch of the CCD exposed to the notch. C for pressing part of the back
With the provision of the CD pressing member, the CCD can be directly pressed, and even if distortion occurs during the bonding (soldering) between the CCD and the substrate, the position of the CCD surface is not affected by the distortion. Can be performed reliably.

Further, the CCD bracket is provided with the CC bracket.
According to the structure in which the CCD bracket is tilted with respect to the lens holder, the lens bracket is tilted with respect to the lens holder which holds the lens so that the distance between the both ends in the longitudinal direction of D can be adjusted with respect to the lens. As a result, C
Since the surface of the CD can be directly adjusted, the adjustment can be easily and accurately performed.

[0010] Further, by providing the above-mentioned optical reading device in an image recording device, the usability of the image recording device can be further improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to specific examples shown in the accompanying drawings.

FIG. 1 shows an outline of a copying apparatus 101 (or a facsimile apparatus or a combination thereof) as an example of an image recording apparatus to which the present invention is applied. As shown in FIG. 1, an optical reading device 1 (FIG.
Is fixed on a base plate 102 provided inside the copying apparatus 101. As shown in FIG. 2, a pair of left and right rails 2 that are parallel to each other are arranged and fixed on the base plate 102 so as to sandwich the optical reading device 1 therebetween. Note that a cover 103 that can be opened and closed is provided on the main body of the copying apparatus 101.

On both rails 2, a constant speed as an optical system for holding a fluorescent lamp 3 for irradiating an original (not shown) as an optical reading object placed on a glass original table (not shown). A unit 4 and a half-speed unit 6 as a mirror system for holding mirrors 5a and 5b for guiding the reflected light from the document to the optical reading device 1 are slidably provided. In the figure, the optical reading device 1 is shown with its lid removed.

Each rail 2 is fixed on the base plate via a long frame formed by pressing a plate material. A drive pulley 7 is pivotally supported at one longitudinal end of each frame, and a driven pulley 8 is pivotally supported at each other longitudinal end of each frame. In addition, each pulley 7.8
Has a small-diameter pulley portion and a large-diameter pulley portion having a diameter twice the diameter of the small-diameter pulley portion coaxially and integrally,
A half-speed timing belt 9 is stretched between the small-diameter pulley portions of the drive pulley 7 and the driven pulley 8 forming a pair, and a constant-speed timing belt 10 is stretched between the large-diameter pulley portions. The optical reading device 1 is electrically connected to a control unit (not shown) via a cable, and the drive pulley 7 is driven by a motor (not shown).

The optical reading apparatus 1 includes a lens 11 and a C
This is for positioning the CD 12 optically, and as shown in FIG. 3, components of each optical system are mounted on the casing 1a.

The lens 11 is accommodated in a half-cylindrical cylindrical portion of a lens holding body 13 made of synthetic resin, and is fixed by a band 14 formed by bending a metal plate into a semicircle. The lens holder 13 is fixed to the casing 1a by screwing. The CCD 12 is integrated with the substrate 15 by soldering a plurality of pins that pass through the substrate 15 while being mounted on the substrate 15. Further, the CCD 12 is held so as to be sandwiched between the CCD bracket 16 and the pair of U-shaped elastic pressing pieces 17, and thus the CCD unit is configured. The CCD bracket 16 is attached to the tilt bracket 18 by screws, and the tilt bracket 18 is fixed to the casing 1a by screws.

The lens 11 and the CCD 12 attached to the casing 1a in this manner need to be optically aligned with each other.

The lens holder 13 in the illustrated example has a three-way flange integrally formed so as to extend forward (on the light incident side) and in the left-right direction with respect to the optical axis of the incident light. Are provided respectively. Thereby, the lens 11 can be adjusted in the optical axis direction, and the lens holder 13 can be fixed at three points. In addition,
In the figure, the lens holder 13 is screwed with two screws 19, but a positioning pin is provided on the bottom surface of the lens holder 13 and a guide hole is provided on the casing 1a side to prevent left and right swing. And can be fixed with only two screws 19.

The lens 11 thus positioned
According to the present invention, the position of the CCD is adjusted not by adjusting the substrate 15 as shown in the conventional example but by adjusting the CCD 12, and the structure and adjustment procedure will be described below. .

As described above, the CCD 12 integrated with the substrate 15 has its surface 12a facing the CCD bracket 16
Thereby, the back side is supported by the U-shaped elastic pressing pieces 17 respectively. The CCD bracket 16 is formed, for example, by punching and bending a metal plate.
It is formed to have an L-shaped cross section.

At the center of the CCD bracket 16,
A drop hole 16a having a size that surrounds the outer periphery of the CCD 12 with almost no gap is provided, and portions corresponding to upper and lower sides (long sides of a rectangle) of the drop hole 16a in the CCD bracket 16 in the drawing are mutually separated. A pair of locking pieces 16b bent into opposing L-shaped cross sections are formed. These drop-in holes 16a and a pair of locking pieces 16b constitute a CCD casing regulating portion. In order to allow the light condensed by the lens 11 to pass between the pair of locking pieces 16b, a CC hole is inserted into the drop hole 16a.
With D12 dropped, the opening defined between the locking pieces 16b is adapted to match the light receiving range of the CCD.

As shown in FIG. 4, when the CCD 12 is inserted into the drop hole 16a, its surface 12a
(A portion near both long sides) comes into contact with each locking piece 16b, and C
The front-back direction (the optical axis direction of the incident light) of the surface 12a is positioned with respect to the CD bracket 16. It should be noted that the CCD 12 and the drop hole 16a are provided in the vertical and horizontal directions of the surface.
It is regulated by the tolerance with.

As shown in FIG. 3, screw insertion holes 17 are formed in upper and lower parallel extending portions of the U-shaped elastic pressing piece 17.
a and an engagement hole 17b are provided.
L-shaped tongue piece 1 cut and bent in the middle of
7c is provided. As shown in FIG. 5, the substrate 15 is provided with a pair of left and right cutouts 15 a for exposing a part of the back surface 12 b opposite to the front surface 12 a of the CCD 12.

The back surface 1 exposed in the notch 15a
2b, the tip of the L-shaped tongue piece 17c is pressed, the engagement hole 17b is engaged with the engagement piece 16c formed in the CCD bracket 16, and the screw 20 inserted through the screw insertion hole 17a is inserted into the CCD bracket. Screw hole 16d provided in 16
And the U-shaped elastic pressing piece 17 is integrally assembled to the CCD bracket 16. By setting the dimensions of each part so that the entire U-shaped elastic pressing piece 17 and the L-shaped tongue piece part 17c can be elastically deformed in the assembled state, the back surface 12b of the CCD 12 is attached to the L-shaped tongue piece. The portion 17c can be elastically biased.

Note that the tip of the L-shaped tongue piece 17c is CC
The biasing portion of the L-shaped tongue portion 17c for the CCD 12 can be connected to the CCD 12 by soldering to a soldering portion provided on a corresponding portion of the back surface of the D12. Thereby, the L-shaped tongue piece 17 with respect to the CCD 12 is formed.
The displacement of the urging portion of c can be prevented.

Accordingly, the CCD 12 is integrally assembled to the CCD bracket 16 in a state where the surface 12a is brought into contact with the locking piece 16b with the elastic urging force against the CCD 12.

Although the CCD bracket 16 is screwed to the tilt bracket 18, as shown in FIG. 6, the substrate 15 has a screw hole 1 through which a screw 21 can be inserted.
5b is provided. The notch 15a communicates with the threaded hole 15b, and is formed as one hole without separately forming both, thereby facilitating processing.

Thus, as shown in FIG.
A CCD bracket 16 in which the CD 12 is integrated is assembled integrally with the tilt bracket 18, and the tilt bracket 18 is screwed to the casing 1 a, and together with the lens 11 similarly attached to the casing 1 a, the optical reading device 1 is mounted. Is assembled.

According to the present invention, a pair of pivots 13b coaxial with each other are formed at the upper and lower positions on the rear end wall of the lens holder 13 on which the tilt bracket 18 is mounted. A shaft support hole 18a is provided in a portion to be rotated, and the pivot 13b is inserted into the shaft support hole 18a to connect the tilt bracket 18 to the lens holder 13. As a result, the tilt bracket 18, that is, the CCD 12 is attached to the lens 11
7 can be tilted around the axis b as shown by an arrow A in FIG. 7, that is, the distance between the both ends of the CCD 12 (CCD) in the longitudinal direction and the lens 11 is adjusted to align the CCD with the lens 11. be able to.

After the above adjustment, the tilt bracket 18 is fixed to the casing 1a with two screws 21. The screwing portion 18b provided on the swing bracket 18 for inserting the screw 21 is formed in a fork shape to enable the above adjustment.

As described above, the surface 12a of the CCD 12 is
Since the CCD 12 is positioned by the pair of locking pieces 16b of the CD bracket 16 and the CCD 12 is fixed by the drop hole 16a and the U-shaped elastic pressing piece 17, the CC
Even when the D12 and the substrate 15 are relatively inclinedly coupled, the surface 12a can be regulated by the CCD bracket 16. And the CCD bracket 16
The tilt bracket 18 integrated with the lens holder 1
3 is adjusted by tilting with respect to the substrate 15.
The adjustment of the surface 12a can be performed with high accuracy without being affected by the state of coupling with the surface 12a.

The CCD bracket 16 has a pin 22
5 (see FIG. 5), and a pin insertion hole 15c is provided at a position corresponding to the substrate 15. Thus, when the CCD 12 is assembled to the CCD bracket 16, the pin 22 is inserted into the pin insertion hole 15c, whereby the lateral displacement of the CCD 12 with respect to the CCD bracket 16 is restricted, and the CCD 12 is dropped into the drop hole 16a. Positioning work at the time can be facilitated.

Further, in the illustrated example, an example in which the present invention is applied to the positioning control of the surface of the CCD 12 is shown. However, according to the present invention, the present invention is not limited to the CCD, and it is necessary to control the direction of the main surface of the IC element. Applicable to some. For example, it can be suitably used for positioning of a light emitting element and a light receiving element for transmitting and receiving optical signals.

[0034]

As described above, according to the present invention, the CCD is connected to the C
It can be fixed in a state of being in contact with the CD bracket, and the alignment of the CCD with respect to the lens can be performed by adjusting the CCD bracket. Also, CCD
Can be assembled to the CCD bracket by dropping it into the CCD regulating section, and the assembling work can be easily performed. Further, by providing a notch on the substrate for exposing a part of the back surface of the CCD, the CCD can be directly pressed, and even if a distortion occurs at the time of bonding (soldering) between the CCD and the substrate, the influence is not affected. The positioning of the surface of the CCD can be reliably performed without receiving.
In addition, since the surface of the CCD can be directly adjusted by connecting the CCD bracket to the lens holder so as to be tiltable, the adjustment can be performed easily and with high accuracy.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a copying apparatus to which the present invention is applied.

FIG. 2 is a perspective view showing main parts of an optical system such as a facsimile apparatus and a copying apparatus to which the present invention is applied.

FIG. 3 is an exploded perspective view showing the optical reading device.

FIG. 4 is a longitudinal sectional view showing a CCD unit.

FIG. 5 shows a state of being attached to a CCD casing support member.

FIG. 6 is a diagram showing a back surface of the substrate.

FIG. 7 is a plan view of a main part showing a procedure for adjusting the CCD unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Optical reading apparatus, 1a Casing 2 Rail 3 Fluorescent lamp 4 Constant speed unit 5a / 5b mirror 6 Half speed unit 7 Drive pulley 8 Follower pulley 9.10 Timing belt 11 Lens 12 CCD, 12a Front surface, 12b Back surface 13 Lens holding body 14 band 15 substrate, 15a notch, 15b screw hole,
15c Pin insertion hole 16 CCD bracket, 16a Drop-in hole, 16
b Locking piece 17 U-shaped elastic pressing piece 17a Screw insertion hole, 17b engagement hole, 17c L-shaped tongue piece 18 Tilt bracket 19, 20, 21 Screw 22 Pin 101 Copying machine 102 Base plate 103 Cover

Claims (5)

[Claims] 1. An optical reading apparatus comprising: a lens system; and a CCD unit disposed on an optical axis of the lens system, wherein the CCD unit comprises: a CCD for performing photoelectric conversion;
An optical reading device, comprising: a CCD bracket provided with an opening engaged with a front surface of a CD; and a CCD bracket fixing member for fixing the CCD to the CCD bracket. 2. The CCD bracket according to claim 1, wherein the CCD bracket has a CCD restricting portion formed to receive a part of the CCD to restrict lateral displacement of the CCD. Optical reader. 3. A notch provided on the substrate for exposing a part of the back surface of the CCD, wherein the CCD is integrally coupled on a substrate, and the CC exposed on the notch.
The optical reading device according to claim 1, further comprising a CCD pressing member configured to press a part of the back surface of D. 4. 4. The apparatus according to claim 1, wherein the CCD bracket is tiltably connected to a lens holder for holding the lens so as to adjust a distance between both ends of the CCD in the longitudinal direction with respect to the lens. The optical reading device according to claim 1. 5. An image recording apparatus comprising the optical reading device according to claim 1.