JPH0574077U - CCD fixed structure - Google Patents

Abstract

(57) [Abstract] [Purpose] CCD fixing structure used for video cameras, still video cameras, etc. does not require man-hours and can perform CCD alignment with a simple configuration.
It is an object of the present invention to provide a CCD fixing structure capable of coping with the above fixing structure even when the image forming position is different. [Structure] At least one of the height and the width of the first and second walls 29 and 30 of the CCD holding member 28 having elasticity is formed to be larger, and the CC force is restored by the elastic force restoring force.
D32 is pressed against the reference surfaces S1 and S2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fixed structure of a CCD used in, for example, a video camera, a still video camera and the like.

[0002]

[Prior Art]

 Conventionally, the following method has been used as a method for accurately arranging the CCD with respect to the optical axis in the structure for fixing the CCD. A method for adjusting the CCD while displaying a picture on the monitor by providing a mechanism to drive the CCD in each axis. A method of aligning with positioning pins. A method of fixing the CCD while assembling it while holding it in the reference position with a hand or a jig.

Next, a second example () of the above conventional example will be described with reference to the drawings. FIG. 9 is a sectional configuration diagram of a conventional CCD fixing structure, and FIG. 10 is a partial sectional view of a left side surface in FIG.

In the figure, a CCD frame 1 is formed with a stepped hole 4 composed of a first recess 2 and a second recess 3. Two protrusions 5 and 6 are formed in the step portion inside the CCD frame 1.

A CCD 7 is provided in the second recess 3. The CCD 7 is provided with holes 8 and 9 into which the protrusions 5 and 6 of the CCD frame 1 are fitted. Of these two holes, the diameter of the hole 8 is set so as to have almost no tolerance with the outer diameter of the protrusion 5, and the shape of the other hole 9 is an elongated hole extending in the longitudinal direction of the CCD 7. ing.

The first recess 2 holds an OLP filter (optical low-pass filter) 10 on one end side and a CCD holding member that can abut the cover glass 11 of the CCD 7 on the other end side. 12 is inserted. The OLP filter 10 is provided to prevent moire and spurious signals when handling a color image, and is unnecessary when handling a monochrome image.

Then, on the surface of the CCD 7 opposite to the surface on which the cover glass 11 is provided, there is a holding plate 15 whose middle portion is in contact with the CCD 7 and whose both ends are attached to the CCD frame 1 by using screws 13 and 14. It is provided.

In such a configuration, positioning of the CCD 7 in a plane orthogonal to each other (positioning of the CCD 7 and the optical axis) is performed by fitting the projections 5 and 6 of the CCD frame 1 into the holes 8 and 9 of the CCD 7. Be seen.

Further, the orthogonality (inclination) of the CCD 7 to the optical axis is performed by pressing the CCD 7 against the other end of the CCD holding member 12 by the pressing plate 15.

[0010]

[Problems to be solved by the device]

 However, the above-mentioned conventional examples 1 to 3 have the following problems. It takes man-hours. CCD 7 must have holes 8 and 9 for positioning. Moreover, the thickness of OLP filter 10 is determined by the pixel pitch of CCD 7 (for example, 250,000 pixels and 380,000 pixels). .. Further, even if the pixel pitch of the CCD is not changed, the thickness of the OLP filter is different when the type of the color filter itself of the CCD (for example, mosaic or stripe) is different. Here, if the thickness of the OLP filter is different, the image forming position is different (for example, if the thickness of the OLP filter is thick, the image forming position is retracted), and the mounting position of the CCD must be changed accordingly. I won't. A few changes can be dealt with by adjusting the lens, but if there were major changes, the CCD frame 1 was remade or a dummy glass member was connected to the OLP filter. Therefore, there are problems that the number of parts is increased and the cost is increased.

The present invention has been made in view of the above problems, and a first object of the present invention is to provide a CCD fixing structure capable of aligning CCDs with a simple structure without requiring man-hours. To do.

A second object of the present invention is to provide a CCD fixing structure that can be used even when the imaging position is different.

[0013]

[Means for Solving the Problems]

 FIG. 1 is a principle diagram of the first device. In this figure, 21 is a CCD frame in which a rectangular recess 22 is formed. First, second, third and fourth walls 23, 24, 25 and 26 are formed in the recess 22 of the CCD frame 21. Of these four walls, the first and second walls 23 which are orthogonal to each other. , 24 are formed with reference surfaces S1 and S2, and a hole 27 is formed in the bottom surface of the recess 22.

A CCD holding member 28 having elasticity is fitted in the recess 22 of the CCD frame 21. A first wall 29 and a second wall 30 facing the third and fourth walls 25, 26 of the CCD frame 21 are formed in the CCD holding member 28, and the hole 2 of the CCD frame 21 is formed on the bottom surface. A hole 31 that faces 7 is formed.

Reference numeral 32 denotes a CCD that is mounted so that the cover glass faces a hole 31 formed in the bottom surface of the CCD holding member 28.

Reference numeral 33 denotes a holding plate which is attached to the CCD frame 21 at its both end portions, the middle portion of which is in contact with the surface of the CCD opposite to the surface provided with the cover glass.

At least one of the width and the height of the first and second walls 29, 30 of the CCD holding member 28 has the following dimensional relationship in the natural state. (a) The sum (W1 + T, W2 + Y) of the widths W1 and W2 of the walls 29 and 30 and the lengths of the CCD in the vertical and horizontal directions T and Y is longer than the inner dimension (t, y) of the CCD frame 21. That is, W1 + T> t, W2 + Y> y (b) The height H of the walls 29, 30 is higher than the inner dimension h1 of the CCD frame 21 and the height h2 of the CCD. That is, H> h1, h2.

Although the reference plane is provided on the CCD frame 21 in the above-mentioned principle diagram, it may be provided on the pressing plate 33.

A second invention is a CCD frame in which a stepped concave portion composed of a rectangular first concave portion and a second concave portion larger than the first concave portion is formed, and the first concave portion. An OLP filter holding member that fits, an OLP filter held by the OLP filter holding member, a CCD holding member that fits in the second recess, a CCD held by the CCD holding member, and an intermediate portion. Has a holding plate attached to the CCD frame, and both ends thereof are attached to the CCD frame, and at least an intermediate portion of one surface of the holding plate has a step formed at both ends. Is.

[0020]

[Action]

 In the CCD fixing structure of the first invention, when assembled, the first and second walls 29 and 30 of the CCD holding member 28 are elastically deformed, and the CCD 32 is brought into contact with the reference planes S1 and S2 of the CCD frame 21, so that the CCD 32 Positioning is performed on a plane orthogonal to the optical axis of.

In the CCD fixing structure of the second invention, since at least one surface of the pressing plate is stepped with respect to both ends of the pressing plate, it is possible to use the front and back of the pressing plate properly. The position with respect to the optical axis changes, corresponding to different imaging positions.

[0022]

Embodiment An embodiment of the present invention will be described with reference to the drawings. 2 is a sectional view showing the first embodiment of the present invention, FIG. 3 is a bottom view in FIG. 2, FIG. 4 is a plan view of a CCD holding member in FIG. 2, and FIG. 5 is a cross section taken along line AA in FIG. 6 and 6 are sectional structural views for explaining a second embodiment of the present invention, in which the left half and the right half have different numbers of CCD pixels, and FIG. 7 is a plan view of the holding plate in FIG. 8 and 9 are sectional views taken along line BB in FIG.

First, a first embodiment of the present invention will be described with reference to FIGS. Reference numeral 51 is a CCD frame in which a rectangular recess 52 is formed. First, second, third and fourth walls 53, 54, 55 and 56 are formed in the concave portion 52 of the CCD frame 51. Of these four walls, the first and second walls 53 orthogonal to each other are formed. , 54 are formed with reference surfaces S 1 and S 2 protruding into the recess 52, and holes 57 are formed in the bottom surface of the recess 52.

A CCD holding member 58 having elasticity is fitted in the recess 52 of the CCD frame 51. (In this embodiment, silicon rubber is used.) The CCD holding member 58 includes a first wall 59 and a second wall 60 that face the third and fourth walls 55 and 56 of the CCD frame 51. And a hole 61 facing the hole 57 of the CCD frame 51 is formed on the bottom surface.

Reference numeral 62 denotes a CCD that is placed so that the cover glass 63 faces the hole 61 formed in the bottom surface of the CCD holding member 58.

Reference numeral 64 designates a holding plate in which an intermediate portion is in contact with a surface of the CCD 62 opposite to the surface on which the cover glass 63 is provided, and both ends are attached to the CCD frame 51 by using screws 65 and 66.

A lens barrel 69 is attached to the CCD frame 51 using screws 67 and 68. A lens 70 is arranged in the lens barrel 69.

Further, in this embodiment, the first and second walls 59 and 60 of the CCD holding member 58 are set so as to have the following dimensional relationship in a natural state.

The height H of the first and second walls 59 and 60 is higher than the internal dimension h1 of the CCD frame 21 and the height h2 of CCD. That is, H> h1, h2 According to the above configuration, when the CCD 62 is set on the CCD holding member 58 and the CCD holding member 58 is fitted to the CCD frame 51, the first and second walls of the CCD holding member 58 are arranged. Since the walls of the walls 59 and 60 are high in height, the walls 59 and 60 receive a compressive force in the height direction and are curved in the width direction. This curved portion presses the CCD 62 against the reference planes S1 and S2. Then, the alignment can be performed.

Therefore, the number of steps is reduced as compared with the related art, and the CCD 62 does not require a hole for alignment.

The present invention is not limited to the above embodiment. For example, in the above-mentioned embodiment, the description has been given by taking the example in which the heights of the first and second walls 59 and 60 of the CCD holding member 58 are increased, but the following dimensional relationship may be adopted.

The sum (W1 + T, W2 + Y) of the widths W1 and W2 of the first and second walls 59 and 60 and the vertical and horizontal T and Y lengths of the CCD 62 is the inner dimension (t, y) of the CCD frame 51. ) Each longer. That is, W1 + T> t and W2 + Y> y. With such a size, the first and second walls 59 and 60 are elastically deformed as in the above-described embodiment, and the CCD 62 can be aligned by this restoring force.

Further, both the thickness and the height of the first and second walls 59 and 60 of the CCD holding member 58 may be increased.

Although the reference surfaces S1 and S2 are provided on the CCD frame 51, they may be provided on the holding plate 64.

Further, in the above-described embodiment, the case of aligning the CCD 62 has been described, but it goes without saying that the invention can also be applied to aligning the OLP filter.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 to 8. In the figure, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. In these figures, 71 is an OLP filter holding member that holds OLP filters 72 and 72 'having different thicknesses. Further, the CCDs 62, 62 'held by the CCD holding member 58 also have different numbers of pixels.

A step portion 74 is formed on both ends of the pressing plate 73, which is in contact with the CCDs 62 and 62 ', at an intermediate portion of one surface of the pressing plate 73.

Further, 75 is a spacer for stably holding the OLP filter 72 ′ having a thickness that cannot be held by the OLP filter holding member 71.

According to the above configuration, the position of the CCD 62 in the optical axis direction can be changed by properly using the front and back of the pressing plate 73. That is, the thickness of the OLP filter changes, and it is possible to cope with different image forming positions.

The present invention is not limited to the above embodiment. In the above embodiment, the example in which the step portion 74 is formed on only one surface of the pressing plate 73 has been described, but the step portion may be formed on both surfaces.

[0041]

[Effect of the device]

 As described above, according to the first aspect of the invention, the CCD fixing structure capable of aligning the CCD with a simple structure can be used in the second aspect even when the image forming positions are different. Each possible CCD fixing structure can be realized.

[Brief description of drawings]

FIG. 1 is a principle diagram of a first device.

FIG. 2 is a sectional configuration diagram illustrating a first embodiment of the present invention.

FIG. 3 is a bottom view of FIG.

FIG. 4 is a plan view of the CCD holding member in FIG.

5 is a sectional view taken along line AA in FIG.

FIG. 6 is a cross-sectional configuration diagram illustrating a second embodiment of the present invention, in which the left half and the right half have different numbers of CCD pixels.

FIG. 7 is a plan view of the pressing plate in FIG.

8 is a sectional view taken along line BB in FIG.

FIG. 9 is a cross-sectional configuration diagram of a conventional CCD fixing structure.

FIG. 10 is a partial cross-sectional view of the left side surface in FIG.

[Explanation of symbols]

 21 CCD Frame 22 Recess 23 First Wall 24 Second Wall 25 Third Wall 26 Fourth Wall 27 Hole 28 CCD Holding Member 29 First Wall 30 Second Wall 31 Hole 32 CCD 33 Holding Plate S1, S2 reference plane

Claims (2)

[Scope of utility model registration request] 1. A CCD frame in which a rectangular recess is formed and a hole is formed in the bottom surface of the recess, and first and second CCD frames fitted in the recess of the CCD frame and formed in the recess of the CCD frame. , A first wall and a second wall that face the orthogonal third and fourth walls of the third and fourth walls, and a hole that faces the hole of the CCD frame are formed on the bottom surface. And a CCD holding member having elasticity, a CCD mounted so that the cover glass faces a hole formed in the bottom surface of the CCD holding member, and a surface of the CCD opposite to the surface on which the cover glass is provided. The middle portion is in contact with the both ends, and the holding plate is attached to the CCD frame, and the reference plane of the CCD is the first and second surfaces of the CCD frame and the first frame of the CCD frame of the holding plate. And the first surface of the CCD holding member. It is at least one of the width of the wall and the height, CCD fixing structure, characterized in that the following dimensional relationship in nature. (a) The sum of the width of the wall and the vertical and horizontal lengths of the CCD is C
Each is longer than the inner dimension of the CD frame. (b) The height of the wall is the inner dimension of the CCD frame and the CCD
Higher than the height of. 2. A CCD frame having a stepped recess formed of a rectangular first recess and a second recess larger than the first recess, and an OLP filter fitted into the first recess. A holding member, an OLP filter held by the OLP filter holding member, a CCD holding member fitted in the second recess, a CCD held by the CCD holding member, and an intermediate portion abutting on the CCD. A CCD fixing structure, characterized in that both ends have a holding plate attached to the CCD frame, and at least an intermediate portion of one surface of the holding plate is formed with a step with respect to both ends.