JPH03150511A - Image reading device - Google Patents

Abstract

PURPOSE:To easily fix a read sensor in the optical position adjustment at a specific position by providing a 1st member, a 2nd member, and a 3rd member which fixes the 1st member to the 2nd member. CONSTITUTION:A CCD line sensor 1 is fixed to a CCD substrate 3 as the 1st member and contacts a lens holder 4 as the 2nd member on a plane 2 formed by the CCD substrate 3. A fixation bush 5 as the 3rd member is restrained by the lens holder 4 from moving and rotating excepting the normal direction of the plane 2. Then a set screw 6 is clamped to move the fixation bush 5 in the normal direction of the plane 2 and the CCD substrate 3 is clamped without transmitting the torque of rotation of the set screw 6 to the CCD substrate 3. Consequently, the read sensor 1 can easily be fixed at the specific position at the time of optical position adjustment by moving the 3rd member in the normal direction of the plane.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image reading device that adjusts the optical position of a reading sensor by moving the sensor in a plane parallel to the sensor element surface.

[Prior Art] Conventionally, an image reading device that adjusts the optical position of a reading sensor by moving the sensor in a plane parallel to the sensor element surface has a reading sensor unit that forms the plane and a fixed position of the sensor. 1 member is in contact with the first member in the plane.
The optical position was adjusted and screwed to the member.

[Problems to be Solved by the Invention] However, in the above conventional technology, the first member is
Since the rotational torque of the screw when screwed to the member causes the first member to rotate, there is a problem in that it becomes difficult to adjust and fix the first member in a predetermined position.

The present invention attempts to solve the above problems. That is, an object of the present invention is to provide an image reading device in which the optical position adjustment of a reading sensor can be easily fixed at a predetermined position.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an image reading device that adjusts the optical position of a reading sensor by moving the sensor in a plane parallel to a sensor element surface. a first member whose portion forms the plane and to which the sensor is fixed; and a second member to which the first member is attached in contact with the first member on the plane and the first member is optically positioned. , a third member that restricts movement and rotation in the normal direction of the plane and fixes the first member to the second member by movement in the normal direction of the plane. And so.

[Function] According to the present invention, in addition to the conventional member S1 and the second member, movement and rotation in the normal direction of the plane formed by both the first and second members are regulated, In addition, since the third member is provided which fixes the first member to the second member by movement in the normal direction of the plane, the first member is not attached to the second member. The first member can be adjusted and fixed at a predetermined position without causing the first member to rotate due to the rotational torque of the screw when fastening.

[Embodiment] FIGS. 1 and 2 show a first embodiment of the present invention, and are configuration diagrams of a reading section of an image scanner having a reduction optical system including a CCD line sensor and an optical lens.

In the same figure, 1 is a CCD line sensor, 2 is the CCD
A plane parallel to the sensor surface of the line sensor 1, 3 a CCD substrate, 4 a lens holder, 5 a fixing bush, 6 a set screw, and 7 a lens barrel.

FIG. 3 is an enlarged perspective view of the fixed bushing 5. A rotation regulating portion 8 formed by a prism is a sliding surface with the lens holder 4, and regulates the movement and rotation of the fixed bushing 5. Numeral 9 is a hole through which the set screw 6 passes, and a disk-shaped portion 10 is a portion for holding the CCD board 3.

FIG. 4 is an enlarged sectional view of the vicinity of the lens holder 4 and fixing bush 5.

That is, the CCD line sensor 1 is fixed to the CCD substrate 3, which is the first member.

The CCD substrate 3 forms a plane 2 and is in contact with the lens holder 4, which is the second member. The fixed bushing 5, which is the third member, is restricted from moving and rotating in directions other than the normal to the plane 2 by the lens holder 4. By tightening the set screw 6, the fixed bush 5 moves in the normal direction of the plane 2, and the CCD board 3 is moved without transmitting the rotational torque of the set screw 6 to the CCD board 3.
conclude.

In addition, in the above embodiment, CC is used as the reading sensor.
Although the D-line sensor 1 is taken as an example, it may be a two-dimensional area sensor, and the first to third members may be composed of a plurality of members as long as they can be regarded as one member during optical position adjustment. You can.

FIG. 5 is an enlarged perspective view of the second embodiment of the present invention, showing only the fixing bushing 5, which is the third member.

In this second embodiment, the configuration of the rotation regulating portion 8 is slightly different from that in FIG. 3.

FIG. 6 is a sectional view of a third embodiment of the present invention showing the vicinity of the lens holder 4, which is the second member.

In this third embodiment, the fixed bushing 5, which is a third member, is a single member that is press-fitted into the lens holder 4, which is a second member, and the C.
The CD board 3 is fixed.

The means for fixing the first member is not limited to screwing, but may also be applied by pressing with a spring or the like.

[Effects of the Invention] As explained above, according to the present invention, the first member in which the reading sensor portion forms a plane and the reading sensor is fixed, and the first member in contact with the first member on the plane. a second member to which the first member is attached with optical position adjustment; movement and rotation in a direction other than the normal direction of the plane is regulated, and the first member is moved by movement in the normal direction of the plane; Since the third member is provided to be fixed to the second member, the third member is moved in the direction of the normal line of the plane to fix the reading sensor during optical position adjustment. , can be easily fixed in place. Further, since the present invention can be implemented by appropriately adding the third member without significantly changing the configuration of the conventional reading sensor, the present invention can be implemented easily and at low cost.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a first embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is an enlarged perspective view of the fixed bushing of FIG. 1, and FIG. FIG. 5 is an enlarged perspective view of the uninvented second embodiment showing only the fixing bush, and FIG. 6 is a third embodiment of the present invention showing the vicinity of the lens holder. FIG. 1... CCD line sensor 2... Parallel plane 3... CCD board (first member) 4... Lens holder (second member) 5... Fixed bush (third member) 6... Set screw 7... Lens barrel 8...
・Rotation regulating part 9...hole 10...disc-shaped part and 4 others

Claims (1)

[Claims] 1. In an image reading device in which the optical position of a reading sensor is adjusted by movement within a plane parallel to the sensor element surface of the sensor, the reading sensor section forms the plane and the first member to which the sensor is fixed; , a second member to which the first member is attached with optical position adjustment in contact with the first member on the plane; movement and rotation in a direction other than the normal direction of the plane is regulated; and a third member that fixes the first member to the second member by movement in the normal direction of the image reading device.