JP2006203706A - Imaging device fitting structure, plate material fitting structure and plate material fitting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem, wherein spacers or the like that differ in thickness are required, when the spacer is interposed, and a plate material is deformed, since the action directions of compression force of compression spring and pressure of an adjusting screw are deviated from each other, when the compression spring is interposed. <P>SOLUTION: After storing the compression spring 16 in a nut 14 attached to a boss 46 with a screw hole 46a and a male screw 46b, a maintenance board 30 of an image device is loaded, the adjusting screw 12 is inserted into the compression spring 16 to be attached to the boss from the upside of the maintenance board and tightened, until the maintenance board contacts the nut. The nut 14 is let out from the maintenance board 30 to make the holding plate into a floating state, the adjusting screw 12 is tightened against elastic force of the compression spring 16, its tightening state is adjusted and the position of the maintenance board 30 to a mirror box 40 is adjusted. The nut 14 is returned, tightened, until it contacts the maintenance board 30, and the maintenance board after adjustment is held and fixed between the nut and a head 12a of the adjusting screw. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a plate material mounting structure and a plate material mounting method in which a plate material such as an image sensor holding plate for holding an image sensor is attached to an attachment member with an adjusting screw.

  Various plate materials are supported and attached to the attachment member by adjusting screws. For example, an image sensor such as a CCD used in a digital camera or the like is fixed and held on a holding plate, and the holding plate is attached to an attachment member such as a mirror box by being screwed with an adjusting screw.

Here, the image sensor is usually packaged and molded in ceramic or plastic, and manufacturing errors in packaging are unavoidable. Due to manufacturing errors, imaging of the image sensor in the optical axis (imaging optical axis) direction is caused. The position of the surface (light receiving surface) and the perpendicularity of the light receiving surface of the image sensor with respect to the optical axis are distorted.
In order to obtain the desired imaging performance focused at both the center and the periphery of the image, the position in the optical axis direction that forms the imaging surface of the photographic lens and the vertical state with no tilt (tilt) relative to the optical axis Thus, it is necessary to adjust the image pickup surface of the image pickup element to be located at a desired accurate position and attach the holding plate of the image pickup element to the attachment member.

In general, there are three attachment positions, and in order to attach the imaging surface of the image sensor to a desired imaging position, for example, to grasp the position in the optical axis direction and the amount of tilting, three attachment positions are provided. Measure for each position. Then, from this measurement result, an exact desired position on the optical axis and an adjustment dimension for eliminating the tilt with respect to the optical axis are calculated, and a spacer having a thickness corresponding to the adjustment dimension is interposed to tighten the adjustment screw. Thus, the holding plate of the image sensor is attached to the attachment member.
However, in this method, it is necessary to prepare spacers having different thicknesses, which increases costs. In addition, since it is necessary to accurately assemble and adjust different combinations of spacers at the three mounting positions, the adjustment process becomes complicated, and adjustment is difficult unless a skilled worker is employed.

Instead of the spacer, a compression spring is interposed between the holding plate of the image sensor and the mounting member, and the adjusting screw is tightened against the elastic force (compression force) of the compression spring, that is, the position of the image sensor holding plate, Has proposed a method of adjusting the position of the imaging surface of the imaging device.
In the configuration in which the compression spring is interposed between the holding plate of the image sensor and the mounting member, there is no need to prepare a measuring device or a spacer for measuring the position of the imaging surface of the image sensor, and the image sensor holding plate with respect to the mounting member Are adjusted steplessly with high accuracy by the tightening state (tightening position) of the adjusting screw at the three attachment positions, and the adjustment process is simplified.
For example, in Japanese Patent Application Laid-Open No. 2003-134383, a spring seat (bottom hole) is formed adjacent to a screw hole into which an adjustment screw is screwed, and a compression spring is accommodated and arranged in this spring seat, and a mounting member Is applied to the holding plate of the image sensor.

Usually, the adjustment screw is inserted through the insertion hole of the holding plate of the imaging element from the holding plate side of the imaging element and screwed into the screw hole of the mounting member. However, in Japanese Utility Model Publication No. 4-013888, two types of screws, a push screw and a pull screw, are screwed together from the mounting member side, and the position of the holding plate of the image sensor is adjusted by tightening the push screw and the pull screw. .
That is, in this publication, the pulling screw extends from the mounting member side through the mounting member insertion hole and the imaging element holding plate insertion hole, and the flange and the imaging element holding plate are arranged around the nut with the flange. The extension end of the pulling screw is screwed onto the flanged nut while compressing the compression spring disposed therebetween, and an elastic force in the direction of the mounting plate is applied to the holding plate of the image sensor. Separately from the spring-loaded pull screw, another pull screw is screwed into the screw hole of the image sensor holding plate and the tip abuts against the image sensor holding plate to resist the elastic force of the compression spring. There are one lock screw (push screw) and two adjustment screws (push screw) that push the holding plate back from the mounting plate. The lock screw is adjacent to the spring-loaded pull screw, and the two adjustment screws are two pull screws. The screws are sufficiently spaced apart from each other in the middle of the screws and screwed into the screw holes of the holding plate of the image sensor.
The position of the image pickup surface of the image pickup device in the optical axis direction is adjusted by another pull screw, and the tilt of the image pickup surface of the image pickup device is adjusted by another pull screw, a lock screw, and two adjustment screws. .
JP 2003-134383 A No. 4-013888

However, the image sensor holding plate is only pressed against the head (head) of the adjusting screw by the elastic force of the compression spring, and the image pickup device holding plate is not fixed. When an impact force is applied, a positional shift occurs on the image pickup surface of the adjusted image pickup device.
Here, if a large elastic force against the vibration and impact force is generated in the compression spring, the image plane can be prevented from being displaced. However, in any of the configurations disclosed in Japanese Patent Application Laid-Open Nos. 2003-134383 and 4-013888, the compression spring is not positioned coaxially with the adjusting screw, and the compression force of the compression spring and the compression force of the compression spring are different. Since the pressing force of the adjusting screw that has been resisted acts, if a large elastic force is generated in the compression spring, the holding plate of the image sensor is deformed, for example, a bending deformation occurs, and the image sensing surface of the image sensor is subjected to a tilt. It may occur and the imaging performance may be impaired.
Furthermore, in Japanese Utility Model Publication No. 4-013888, the position of the imaging surface of the image sensor in the optical axis direction is adjusted by another pull screw, and the image sensor is adjusted by another pull screw, a lock screw, and two adjustment screws. The tilt of the imaging surface is adjusted, and it is necessary to adjust the tightening position of the five screws, namely the two pull screws, the three push screws (lock screw, two adjustment screws), and the adjustment process is complicated. Adjustment is difficult unless you are a skilled worker.

  The imaging device mounting structure of the present invention is the imaging device mounting structure, wherein the holding plate having the imaging device and the screw head are in contact with one surface of the holding plate to adjust the holding plate in the optical axis direction. And a support member having a shaft portion that supports the holding plate and has a hole that is screwed with the screw, and a nut that is screwed onto the outer periphery of the shaft portion and that has one end surface in contact with the other surface of the holding plate. It comprises.

  The image pickup device mounting structure of the present invention has a holding plate for holding the image pickup device, an adjustment screw with a head whose bottom surface is in contact with one surface of the holding plate, and a boss with a hole formed therein. A mounting member that is screwed into the hole of the boss and to which the holding plate is attached, a nut that is screwed to the outer periphery of the boss of the mounting member and whose one end surface abuts against the other surface of the holding plate, and An elastic member is provided around the adjustment screw for biasing in a compressed state between one end surface of the boss of the mounting member and the other surface of the holding plate.

  The image pickup device mounting structure according to the present invention has an image pickup device mounting structure in which a holding plate for holding the image pickup device is mounted on the mounting member by screwing an adjusting screw with a head into a screw hole at at least three positions of the mounting member. The mounting member has a boss with a hole formed therein, the adjustment screw is screwed into the hole of the boss, and is arranged around the adjustment screw between the boss of the mounting member and the holding plate. And an elastic member that generates an elastic force against the tightening of the adjusting screw, and a nut that is screwed onto the outer periphery of the boss of the mounting member and holds the holding plate between the head of the adjusting screw. .

  Further, the plate material mounting structure of the present invention is a plate material mounting structure in which the plate material is mounted on the mounting member with an adjusting screw with a head, and a boss provided in the mounting member with a hole into which the adjusting screw is screwed. An elastic member disposed between the boss and the plate material around the adjusting screw and generating an elastic force against the tightening of the adjusting screw; and screwed onto the outer periphery of the boss to adjust the head of the adjusting screw. And a nut for sandwiching the plate material therebetween.

  Further, the plate material mounting method of the present invention includes a step of screwing a nut onto the outer periphery of at least three bosses provided on the mounting member having holes, and an elastic member that generates elastic force against compression. A step of placing the nut in the nut, a step of placing a plate on the mounting member with the nut interposed therebetween, and an adjustment screw with a head inserted into the hole of the boss through the elastic member. A step of screwing the nut in a direction away from the plate material to float the plate material, tightening the adjustment screw while compressing the elastic member, and depending on the tightened state, at least the position of the boss is The step of adjusting the mounting position of the plate material with respect to the mounting member at three locations, the nut is tightened in the direction of the plate material, the plate material is sandwiched between the heads of the adjusting screws, and the plate material is And a step of holding the integer position.

  In the plate material mounting method of the present invention, the nut is screwed into the boss on the mounting member, the elastic member is placed in the nut, the plate material is placed on the mounting member, and the elastic member is inserted from the outside of the plate material. Then, the adjustment screw with the head is screwed into the boss, the nut is released to make the plate material float, the adjustment screw with the head is tightened against the elastic force of the elastic member, and the tightening state is applied to the mounting member. The position of the plate material is adjusted, the nut is returned and tightened, and the plate material is sandwiched between the head of the adjustment screw.

  According to the present invention, the elastic member is positioned around the adjusting screw and coaxially with the adjusting screw, and the direction of action of the elastic force of the elastic member and the pressing force of the adjusting screw against the elastic force is the same. Even if the adjusting screw is tightened against the above, the holding plate of the image sensor is not deformed. In addition, since the holding plate of the adjusted image sensor is sandwiched between the adjustment screw head and the nut by the nut, the image pickup surface of the image sensor is not displaced even when vibration or impact force is applied.

  In the present invention, the nut is screwed to the boss, the compression spring is placed in the nut, the image sensor holding plate is placed on the mounting member, the adjustment screw is screwed to the boss, and the nut is released at one end to float. Tighten the adjustment screw to the image sensor holding plate, and adjust the position of the image sensor holding plate in the tightened state.After adjustment, return the nut and tighten to tighten the image sensor holding plate to the head of the adjustment screw. Between them.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a plate material mounting structure according to an embodiment of the present invention embodied as an image sensor mounting structure 10 in a digital single-lens reflex camera, and FIG. 2 is a process diagram of a mounting method.
As shown in FIG. 1, the image pickup device 20 such as a CCD is fixed and held on a holding plate 30 made of aluminum or the like by adhesion, for example, and the holding plate having the image pickup device is attached to a mounting member 40 by screwing.

  In the digital single-lens reflex camera, the mounting member (supporting member) 40 is called a mirror box, and the mirror box has a known structure and is not described in detail because it is not the gist of the present invention. 42 is attached, and a lens unit (so-called interchangeable lens) is detachably attached to the front body mount 44 via the lens mount, and the image sensor holding plate 30 is attached to the back of the shutter unit. The mounting member 40 (mirror box) houses a quick return mirror that reflects upward the light beam from the subject that has passed through the taking lens of the lens unit.

  Usually, it is sufficient to attach the holding plate 30 to the attachment member 40 by adjusting the position thereof, and it is only necessary to attach the holding plate 30 at three places. It is screwed. That is, three bosses (shaft portions) 46 are integrally formed with the mounting member 40 and protrude, and a through hole (insertion hole) 30 a is formed at a corresponding position of the holding plate 30. Each boss 46 has a cylindrical shape in which a screw hole (female screw) 46a and a male screw 46b are formed. As will be described later, the adjusting screw 12 is screwed into the screw hole, and the nut 14 is screwed into the male screw. . As will be described later, the screw hole 46a may be a simple hole.

  A method of attaching the image sensor holding plate 30 to the attachment member 40 will be described in detail with reference to FIG. As shown in FIG. 2, the holding plate 30 is attached to the attachment member 40 arranged with the boss 46 facing upward in consideration of workability.

First, the nut 14 is mounted on the male screw 46b of the boss 46 of the mounting member shown in FIG. 2A leaving a sufficient space above the boss (FIG. 2B). An elastic member that generates an elastic force against compression, for example, a compression coil spring (compression spring) 16 for energizing a spiral, is disposed in the nut 14 on the boss 46 in a free state. (FIG. 2C). When the compression springs 16 are placed in the nut 14 at three locations, the holding plate 30 of the image sensor is disposed on the mounting member 40 via the nut 14 (FIG. 2D).
The holding plate 30 is disposed on the mounting member 40 with its through hole 30a aligned with the screw hole 46a of the boss. However, it is difficult to arrange the holding plate 30 at a predetermined position from the beginning, and usually, the holding plate 30 is placed on the attachment member 40 and then slid to be positioned. Since the compression spring 16 is placed in the nut 14 on the boss 46, even if the holding plate 30 is slid on the mounting member 40, there is no risk that the compression spring will shift laterally and fall off the boss. The holding plate 30 can be positioned quickly without dropping the compression spring.

When the holding plate 30 of the image sensor is placed on the mounting member 40, the adjusting screw 12 is inserted from above through the through hole of the holding plate 30 and attached to the screw hole 46a of the boss, and tightened until the holding plate hits the nut 14 (FIG. 2E). At this time, it goes without saying that the adjusting screw 12 passes through the compression spring 16 and is screwed into the screw hole 46a.
From the mounting of the nut 14 (FIG. 2 (B)) to the mounting of the adjusting screw 12 (FIG. 2 (E)) is the preparation stage for the adjustment, and all the components are assembled and stand by for the adjustment.

  The nut 14 is released from the holding plate 30 of the image sensor so as to secure a space for tightening the adjusting screw 12 against the elastic force of the compression spring 16 (FIG. 2 (F)), thereby the compression spring. The holding plate is held in a floating state under the elastic force of 16.

  By tightening the adjustment screw against the elastic force (biasing force) of the compression spring 16 and adjusting the tightening state (tightening position) of the adjustment screw, the position (height) of the floating holding plate 30 is adjusted, The position of the image sensor holding plate with respect to the mounting member 40 is adjusted in the optical axis direction (subject light flux direction) (FIG. 2G). At the three adjustment positions, the adjustment screw 12 is tightened while adjusting the position of the holding plate 30 in the optical axis direction and the tilt amount so that the image pickup surface of the image pickup device 20 comes to the image formation position in a vertical state without any tilt. In addition, the holding plate 30 of the image sensor is adjusted in the optical axis direction and attached to the attachment member 40.

Here, the compression spring 16 is positioned coaxially with the adjustment screw around the adjustment screw 12, and the elastic force (compression force) of the compression spring and the pressing force (clamping force) of the adjustment screw 12 act on the same axis. The direction matches. For this reason, even if the adjustment screw 12 is tightened against the elastic force of the compression spring 16, the deformation due to the displacement of the action direction does not occur in the holding plate 30 of the image sensor, and the tightening of the adjustment screw is not performed on the image sensor 20. There is no risk of tilting the imaging surface.
In addition, since the position of the holding plate 30 of the image sensor is adjusted by the adjustment screw 12, the position of the holding plate can be adjusted with high accuracy, steplessly and easily by the tightening state of the adjustment screw.

Then, the nut 14 is turned, tightened until it returns to the holding plate 30 direction of the image sensor and comes into contact with the holding plate, and the holding plate is held between the head (head) 12a of the adjusting screw and the nut. The plate is fixed at the adjusted position (FIG. 2 (H)).
Since the adjusted holding plate 30 of the image sensor is clamped between the adjustment screw head 12a by tightening the nut 14 and firmly fixed, the holding plate can be moved from the adjustment position even if vibration or impact force is applied. It does not move, and no positional deviation occurs on the imaging surface of the imaging device 20 on the holding plate. And since it clamps, ie, it hold | maintains from the up-down direction, it can oppose a vibration and impact force, without tightening the adjustment screw 12 strongly.
Further, the position of the image sensor holding plate 30 is adjusted by tightening the adjusting screw 12, and the holding plate is fixed to the adjusting position by tightening the nut 14. In the adjusting process, the adjusting screw 12 and the nut 14 are fixed at three positions. Since the adjustment process is simplified, non-skilled workers can make quick and accurate adjustments.

In the embodiment, a compression spring (compression coil spring) 16 is used as an elastic member that resists tightening of the adjusting screw 12. However, the elastic member is sufficient if it holds the holding plate 30 of the image pickup device in a floating state and generates an elastic force that resists the tightening of the adjusting screw 12. If the required elastic force can be secured, the metal compression spring 16 is sufficient. Instead of this, an annular cylindrical rubber 116 (FIG. 3A) or a bellows 216 made of rubber or an annular synthetic resin (FIG. 3B) can be used as an elastic member.
If the elastic member is the compression spring 16, the unit price is low and a large elastic force can be obtained. On the other hand, if the elastic member is the cylindrical rubber 116 or the bellows 216, they are not entangled with each other. Therefore, the work can be easily taken out from the working storage box and placed in the nut 14, and automation can be easily handled. .

In the embodiment, the screw hole 46a of the boss is described as being formed with a screw. However, as another example, the adjustment screw 12 may be a self-tapping screw, and the screw hole 46a may be a simple hole that is not threaded. .
The boss 46 is integrally formed with the mirror box 40, but a boss formed separately may be attached to the mirror box. However, it is preferable to form the boss 46 integrally because a certain accuracy can be secured.
Further, in the embodiment, although the position is adjusted by sliding when the holding plate 30 and the boss 46 are assembled, the positioning boss protrudes from the mirror box 40 and the hole that fits the positioning boss on the holding plate 30 is provided. Can be positioned without sliding.
In the embodiment, the compression spring 16 which is an elastic member is used. However, the elastic member is unnecessary when the assembly of the mounting structure is completed, and can be omitted. However, the use of this elastic member can improve the assemblability.

The embodiments described above are for explaining the present invention, and the present invention is not limited to the embodiments. Modifications and applications other than the above can be made without departing from the gist of the present invention. Needless to say.
For example, the embodiment is embodied as an attachment structure for attaching a holding plate (plate material) of an image sensor in a digital single-lens reflex camera to a mirror box (attachment member). However, the present invention is not limited to the attachment of the image sensor holding plate to the mirror box, but can be applied to an attachment structure in which various plate materials are attached to corresponding attachment members with adjusting screws.

  According to the present invention, even if the adjusting screw is tightened, the plate material is not deformed, and once adjusted, no displacement occurs even if vibration or impact force is applied. The present invention can be widely applied in the field of components.

The perspective view of the board | plate material attachment structure based on the Example of this invention embodied as an attachment structure of the image pick-up element in a digital single-lens reflex camera is shown. An example of a board | plate material attachment method is shown. The modification of an elastic member is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mounting structure of board | plate material 12 Adjustment screw 12a Head of adjustment screw 14 Nut 16 Compression spring (elastic member)
20 Image sensor 30 Image sensor holding plate (plate material)
40 Mirror box (mounting member)
46 Boss (shaft) on the mirror box
46a Screw hole of boss 46b Male screw of boss 116 Cylindrical rubber 216 Bellows made of rubber or synthetic resin

Claims (9)

In the image sensor mounting structure,
A holding plate having an image sensor;
A screw that makes contact with one surface of the holding plate and adjusts the holding plate in the optical axis direction;
A support member that supports the holding plate and has a shaft portion having a hole screwed into the screw;
A nut threadedly engaged with the outer periphery of the shaft portion, one end surface of which is in contact with the other surface of the holding plate;
An image pickup element mounting structure comprising: A holding plate for holding the image sensor;
An adjustment screw with a head whose bottom surface is in contact with one surface of the holding plate;
A mounting member having a boss formed with a hole, the adjustment screw being screwed into the hole of the boss, and the holding plate being mounted;
A nut that is screwed onto the outer periphery of the boss of the mounting member and whose one end surface abuts against the other surface of the holding plate;
An elastic member disposed around the adjustment screw for biasing in a compressed state between one end surface of the boss of the mounting member and the other surface of the holding plate;
An imaging device mounting structure comprising: In the image sensor mounting structure in which the holding plate for holding the image sensor is mounted on the mounting member by screwing an adjusting screw with a head into the screw hole at at least three positions of the mounting member.
The mounting member has a boss formed with a hole, and the adjustment screw is screwed into the hole of the boss,
An elastic member that is arranged around the adjustment screw between the boss of the mounting member and the holding plate, and generates an elastic force against the tightening of the adjustment screw;
A nut that is screwed onto the outer periphery of the boss of the mounting member and sandwiches the holding plate with the head of the adjustment screw;
An image pickup element mounting structure comprising: In the plate material mounting structure in which the plate material is mounted on the mounting member with an adjustment screw with a head,
A boss provided on the mounting member with a hole threadedly engaged with the adjustment screw;
An elastic member disposed between the boss and the plate material around the adjusting screw and generating an elastic force against the tightening of the adjusting screw;
A nut that is screwed onto the outer periphery of the boss and sandwiches the plate material with the head of the adjustment screw;
The board | plate material attachment structure characterized by comprising. 5. The plate material mounting structure according to claim 4, wherein the boss is formed at least at three locations integrally with the mounting member. 6. The plate material mounting structure according to claim 3, wherein the holding plate is a holding plate for holding an image pickup device. Screwing a nut around the outer periphery of at least three bosses provided on the mounting member with holes;
Placing an elastic member in the nut on the boss for generating an elastic force against compression;
A step of arranging a plate material on the mounting member via the nut;
Inserting the adjustment screw with a head through the elastic member and screwing it into the hole of the boss;
A step of screwing the nut in a direction away from the plate material to bring the plate material into a floating state;
Tightening the adjustment screw while compressing the elastic member, and adjusting the mounting position of the plate material to the mounting member at at least three positions where the boss is positioned according to the tightening state;
A method of attaching a plate material, comprising: tightening the nut in the plate material direction, sandwiching the plate material with a head of the adjustment screw, and holding the plate material at an adjustment position. Screw the nut onto the boss on the mounting member, place the elastic member in the nut, place the plate on the mounting member, insert the elastic member from the outside of the plate, and attach the head adjusting screw to the boss. Screwed to release the nut to float the plate material, tighten the adjustment screw with head against the elastic force of the elastic member, adjust the position of the plate material relative to the mounting member according to the tightened state, the nut A plate mounting method in which the plate is clamped with the plate screwed between the head of the adjusting screw. 9. The plate material mounting method according to claim 6, wherein the holding plate is a holding plate for holding an image sensor.

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