JPH11167054A - Image input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image input device capable of obtaining higher the parallisms between a CCD and a CCD mount to which a lens is attached dependently of only the precion of the CCD and the CCD mount. SOLUTION: In this image input device which converts incident light from an optical system into an electric signal by an imaging device and records it, the CCD 11 is pressed through an elastic body part 15 from the rear surface of the CCD 11, and the front surface of the CCD 11 presses the CCD receiving boss 20 of the CCD mount 13, so that this image input device depends on only the presion of the CCD 11 and the CCD mount 13, therefore, the higher parallelism can be obtained between the CCD 11 and the mount 13 to which the lens barrel 18 is attached.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image input device for a digital camera or the like.

[0002]

2. Description of the Related Art A conventional image input device will be described.
4 and 5 are cross-sectional views around a CCD of a conventional image input device. In FIG. 4, reference numeral 1 denotes a CCD (Charge C).
coupled device), 2 is a CCD mount,
3 is a CCD mounting board, 4 is a fastening component, and 8 is a lens barrel. In FIG. 5, 6 is an aluminum plate, and 7 is a CCD mounting board.

In FIG. 4, a CCD 1 is mounted on a CCD mounting substrate 3, and a CCD mount 2 having a lens barrel 8 mounted thereon is fixed to the CCD mounting substrate 3 by covering the CCD 1. In FIG. 5, the CCD 1
And an aluminum plate 6 between the CCD mounting board 7 and
The CCD 1 is mounted on a CCD mounting board 7, and a CCD mount 2 with a lens barrel 8 mounted thereon is fixed to the aluminum plate 6 by covering the CCD 1.

[0004]

In an image input apparatus, if the lens system and the CCD are relatively inclined, the focus shifts by the amount of the inclination and the image is blurred. is important. However, since the lens system and the CCD are composed of different parts, a connecting part is required. Therefore, in order to obtain the parallelism between the lens system and the CCD, the parallelism between each component and the connecting component must be obtained. The parallelism between the CCD mount and the CCD, which are connected parts, will be described.

[0005] In FIG.
When the mount 2 is fastened and fixed, the CCD 1 and the CCD 1
The parallelism of the mount 2 includes the mounting inclination when the CCD 1 is mounted on the substrate, the warpage of the CCD mounting substrate 3 to which the CCD mount 2 is fastened, the inclination of the CCD 1 alone, and C
Since it depends on the four precisions of the CD mount 2, the degree of parallelism between the CCD 1 and the CCD mount 2 is hardly obtained.

[0006] As shown in FIG.
With the aluminum plate 6 interposed between the mounting substrates 7, the aluminum plate 6
When the D mount 2 is fastened and fixed, the D mount 2 is fastened to the CCD mounting board 7 which has a large error factor of warpage compared to the former, to the aluminum plate 6 which is a metal which is likely to have a high degree of parallelism. In this case, the error when the CCD mount 2 is fastened is made as small as possible. In this case, the parallelism between the CCD 1 and the CCD mount 2 is
The mounting inclination when mounting the CCD 1 with the aluminum plate 6 interposed between the mounting plate 1 and the mounting substrate 7, the inclination of the CCD 1 alone, and the accuracy of the CCD mount 2 are smaller than the former, but still depend on the three accuracy. Therefore, there is a problem that the parallelism between the CCD 1 and the CCD mount 2 is hardly obtained.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image input apparatus which can minimize a decrease in accuracy due to accumulation of errors of assembled parts and can easily obtain accuracy in an optical system.

[0008]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention relates to an image input device for converting incident light from an optical system into an electric signal by an image pickup device and recording the electric signal.
By pressing the CCD from the rear surface via an elastic body and pressing the front surface of the CCD against the CCD receiving portion of the CCD mount, high parallelism can be obtained between the CCD and the CCD mount.

[0009] With this configuration, it is possible to minimize the decrease in accuracy due to the accumulation of errors of the assembled parts, and to realize an image input apparatus that can easily obtain accuracy in the optical system.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is an image input device for converting incident light from an optical system into an electric signal by an image pickup device and recording the electric signal. Press and place C on the CCD receiver of the CCD mount.
By pressing the front of the CD, high parallelism between the CCD and the CCD mount can be obtained.

With this configuration, an image input device that can obtain higher parallelism between the CCD and the CCD mount on which the lens is mounted depends only on the accuracy of the CCD and the CCD mount.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing the configuration of components around a CCD of an image input device according to an embodiment of the present invention, FIG. 2 is a detailed view of a portion between a CCD and a CCD mount of the image input device, and FIG. It is sectional drawing.

In FIG. 1, 11 is a CCD, and 12 is a CC.
D positioning hole, 13 is a CCD mount, 14 is a CCD mounting board, 15 is an elastic part, 16 is a pressing member, 17 is a fastening part, and 18 is a lens barrel.

In FIG. 2, reference numeral 19 denotes a CCD positioning pin, and reference numeral 20 denotes a CCD receiving boss. The CCD positioning pin 19 and the CCD receiving boss 20 are both part of the CCD mount 13.

In FIG. 1, the CCD 11 mounted on a CCD mounting board 14 is assembled to a CCD mount 13, and an elastic part 15 is pressed against the back surface of the CCD mounting board 14 (around the back side on which the CCD 11 is mounted). The pressing member 16 is put on the pressing member 16 and the pressing member 16 is
Assembling is performed by fastening with the CD mount 13. At this time, as shown in FIG. 2, the positioning of the CCD 11 and the CCD mount 13 is performed by inserting the CCD positioning pin 19 into the CCD positioning hole 12. The method of positioning the CCD 11 and the CCD mount 13 shown here is only one mode, and any method may be used as long as it restricts the direction parallel to the upper surface of the CCD 11. Also, the CCD 11 is CC
Since the upper surface of D11 uniformly hits the CCD receiving boss 20, positioning in the direction perpendicular to the upper surface of the CCD 11 is performed.

FIG. 3 is a partial cross-sectional view of an assembly side around the CCD of the image input device. In FIG. 3, the CCD mounting substrate 1
The CCD 11 mounted on the CCD 4 is pressed from behind the pressing member 16 via the elastic component 15 behind the CCD mounting board 14. At this time, the mounting when the CCD 11 is mounted on the CCD mounting board 14 is performed. Even if there is an error (inclination), the elastic member 15 absorbs the error behind, so that it does not affect the amount of tightening of the pressing member 16.
The mounting substrate 14 is not in contact with the CCD mount 13 in the assembled state, and the CCD 11 is directly connected to the CCD mount 13.
So that the upper surface of the CCD 11
The parallelism between the CCD 11 and the CCD mount 13 depends on two factors of the CCD 11 alone and the CCD receiving boss 20 which is a part of the CCD mount 13 because the parallelism between the CCD 11 and the CCD mount 13 is not affected. Depends on Since the CCD mounting substrate 14 is pressed by the elastic component 15, the substrate factor is absorbed by the elastic component 15, so there is no restriction on the hardness or shape of the substrate. The mounting form of the CCD 11 may be either surface mounting or DIP.

[0017]

As described above, according to the present invention, there is provided an image input device for converting incident light from an optical system into an electric signal by an image pickup device and recording the electric signal. Press and place C on the CCD receiver of the CCD mount.
By pressing the front surface of the CD, only the accuracy of the CCD and the CCD mount is dependent, so that a higher degree of parallelism can be obtained between the CCD and the CCD mount on which the lens is mounted.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of components around a CCD of an image input device according to an embodiment of the present invention.

FIG. 2 is a detailed view between a CCD and a CCD mount of the image input device according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view around a CCD of the image input device according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view around a CCD of a conventional image input device.

FIG. 5 is a cross-sectional view around a CCD of a conventional image input device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 CCD 12 CCD positioning hole 13 CCD mount 14 CCD mounting board 15 Elastic body component 16 Pressing member 17 Fastening component 18 Lens barrel 19 CCD positioning pin 20 CCD receiving boss

Claims (1)

[Claims] An image input apparatus for converting incident light from an optical system into an electric signal by an image pickup device and recording the electric signal, comprising:
An image input device wherein a high degree of parallelism is obtained between the CCD and the CCD mount by pressing the CCD from the rear surface via an elastic body and pressing the front surface of the CCD against the CCD receiving portion of the CCD mount; .