JP4399493B2 - Mount structure of electronic imaging camera - Google Patents

Description

  The present invention relates to a mount structure for an electronic imaging camera suitable for application to, for example, a machine vision system.

  In the machine vision system, an industrial CCD camera using a CCD (Charge Coupled Device) as an area image sensor serving as an image sensor is widely used as an industrial electronic imaging camera. This type of industrial CCD camera is required to have a high-accuracy imaging output, and also has a wide variety of usage forms. Therefore, a highly airtight dustproof structure is required in consideration of an installation environment in which much dust is scattered.

Conventionally, this type of dust-proof structure on the CCD imaging surface has an O-ring, a dust-proof holder, a light-shielding plate, and a cover between a lens mount and a sensor mount (device holder) having an area image sensor (for example, CCD). Glass, dust-proof rubber, and the like are provided separately on each other, and since each of these parts has a separate structure, the number of parts is large and there are problems in workability and economy. As a conventional technique characterized by a dust-proof structure on the CCD imaging surface, a dust-proof member (Patent Document 1) in which the dust-proof member has a small spring constant and internal reflected light is not incident on the imaging surface, or repulsion of dust-proof rubber There has been an attachment structure (Patent Document 2) in which the problem of the inclination of the light receiving surface of the image sensor caused by force is solved by the shape of the dust-proof rubber.
JP 2001-275023 A JP2006-1000087

  However, in the actual assembly structure that is commercialized even in these conventional technologies, the components such as the O-ring, the holder, the light shielding plate, the cover glass, and the dust-proof rubber are individually stacked as described above. Since each of these parts has a separate configuration, the number of parts is large and there are problems in workability and economy.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a mount structure for an electronic imaging camera that solves the above problems, reduces the number of parts, improves productivity, and reduces manufacturing costs.

  The present invention includes a lens mount, a sensor mount attached to the lens mount, an area image sensor provided on the sensor mount, and a dustproof structure provided between the lens mount and the area image sensor. The dust-proof structure includes a holder attached to the sensor mount, a light-shielding plate and a cover glass, and a dust-proof rubber body having a support frame portion that supports the holder, the light-shielding plate and the cover glass in a stacked state; And an O-ring that is integrally provided on the dust-proof rubber main body via a bent portion, and that is folded from the bent portion and clamps and fixes the holder, the light shielding plate, and the cover glass to the support frame portion of the dust-proof rubber main body. It is characterized by the mounting structure of the electronic imaging camera configured as described above.

  According to the present invention, the number of parts can be reduced, productivity can be improved, and manufacturing cost can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of a mounting structure of an electronic imaging camera according to an embodiment of the present invention, FIG. 2 is a perspective view showing an assembly structure of a dustproof structure according to the embodiment, and FIG. 3 is a diagram showing the assembly structure. It is a sectional side view which expands and shows a part.

  As shown in FIG. 1, the mount structure of the electronic imaging camera according to the embodiment of the present invention includes a lens mount 11, a sensor mount 18 attached to the lens mount 11, and an area image provided on the sensor mount 18. The sensor 16 includes a dustproof structural member (12 to 15) provided between the lens mount 11 and the area image sensor 18. The dustproof structural member includes a holder (pressing member) 13 attached to the sensor mount 18, a light shielding plate 14, a cover glass 15, and dustproof rubber 12.

  The area image sensor 16 is a solid-state imaging device having a rectangular imaging surface (light receiving surface) 17 such as a CCD image sensor (Charge Coupled Device Image Sensor) or a CMOS image sensor (C-MOS Image Sensor). Here, an embodiment will be described by taking a mount structure of a CCD camera using a CCD image sensor (hereinafter simply referred to as a CCD) as the area image sensor 13 as an example.

In the CCD camera mounting structure shown in FIG. 1, the dust-proof rubber 12 is made of, for example, silicon rubber. The dust-proof rubber body 12a and a pair of parallel bent portions 12b extending from the dust-proof rubber body 12a, And an O-ring 12c formed integrally with the dust-proof rubber main body 12a via 12b.

  The dust-proof rubber main body 12a is configured to have a box-shaped outer casing corresponding to the imaging surface (light receiving surface) 17 of the CCD 16 and an opening (through hole) that forms an optical path. A support frame portion 12 d that supports the holder 13, the light shielding plate 14, and the cover glass 15 in a stacked state is formed, and a close contact surface portion that is in close contact with the peripheral portion of the imaging surface 17 of the CCD 16 is formed on the other opening surface portion.

  An O-ring 12c provided integrally with the dust-proof rubber main body 12a through a pair of bent portions 12b and 12b parallel to one side of the outer casing of the dust-proof rubber main body 12a includes a holder (pressing member) 13, a light shielding plate 14, and The cover glass 15 is included and mounted in a state of being folded from the bent portions 12b and 12b.

  The O-ring 12c has a fitting structure in which the holder (pressing member) 13 is fitted to the surface portion on the bending side that is bent through the pair of bent portions 12b and 12b, and the O-ring 12c is bent into the bent portions 12b and 12b. 2, the holder 13, the light shielding plate 14, and the cover glass 15 are contained, and the fitting structure is fitted to the holder 13, so that the holder 13, the light shielding plate 14, and the cover glass 15, as shown in FIG. An assembly structure in which the dust-proof rubber main body 12a and the O-ring 12c are combined as one set is configured. Further, by inserting the peripheral portion of the imaging surface 17 of the CCD 16 into the other opening surface portion of the dust-proof rubber main body 12a, in addition to the holder 13, the light shielding plate 14 and the cover glass 15, the dust-proof rubber main body 12a and the O-ring 12c. A set of assembly structures in which the CCD reinforcing pads 16 are integrated in close contact can be configured.

  In this embodiment, as shown in part of the enlarged structure in FIG. 3, the fitting structure has a plurality of fitting convex portions 12e, 12e,... Provided on the O-ring 12c, and a plurality of fittings provided on the holder 13. Although it is comprised by the recessed groove part 13b for fitting, 13b, ..., it is not restricted to this structure, For example, the structure which provided the recessed groove part for fitting in the O ring 12c, and provided the convex part for fitting in the holder 13, or O Other configurations such as a configuration in which a plurality of locking claws are provided on the ring 12c can also be realized.

  The assembly procedure of the mounting structure described above is as follows. First, the O-ring 12c provided integrally with the dust-proof rubber main body 12a is folded from the bent portions 12b and 12b, and the holder 13, the light shielding plate 14 and the cover glass 15 are enclosed, and the fitting is performed. The structure is fitted to the holder 13 to constitute an assembly structure in which the holder 13, the light shielding plate 14, the cover glass 15, the dust-proof rubber main body 12a and the O-ring 12c are combined. Alternatively, in addition to the assembly structure described above, the holder 13, the light shielding plate 14 and the cover glass 15, and the dust-proof rubber body 12 a and In addition to the O-ring 12c, a set of assembly structures in which the CCD 16 is integrated in close contact is configured. An example of this set of assembly structures is shown in FIG. Here, a set of assembly structures including the CCD 16 is illustrated.

  The locking portion 13a of the holder 13 which is a member of the assembly structure is screwed and fixed to the CCD mount 18 which is a sensor mount, so that the holder 13 and the light shielding plate are interposed between the dust-proof rubber body 12a and the O-ring 12c. 14, the cover glass 15, the dust-proof rubber main body 12 a and the O-ring 12 c are sandwiched and the dust-proof rubber main body 12 a is in close contact with the CCD 16, and the O-ring 12 c, the holder 13, the light shielding plate 14, and the cover glass 15. The dust-proof rubber main body 12 a and the CCD 16 are fixed to the CCD mount 18.

  The holder 13 as a member of the assembly structure is screwed and fixed to the CCD mount 18 as a sensor mount, and then the CCD mount 18 is screwed and fixed to the lens mount 11 to complete the CCD camera mounting structure.

  As described above, the dust-proof rubber 12 is configured by integrally providing the dust-proof rubber main body 12a with the O-ring 12c. Further, the dust-proof rubber 12 is used to form the holder 13, the light shielding plate 14, the cover glass 15, and the dust-proof rubber main body. 12a and an O-ring 12c are combined into one assembly structure, or in addition to this structure, by fitting the peripheral portion of the imaging surface 17 of the CCD 16 into the other opening surface portion of the dust-proof rubber body 12a, In addition to the holder 13, the light shielding plate 14 and the cover glass 15, the dust-proof rubber body 12 a and the O-ring 12 c, a set of assembling structures in which the CCD 16 is integrated in close contact with each other is formed. The configuration attached to 18 contributes to the improvement of productivity and the reduction of manufacturing cost, which can reduce the number of parts and greatly simplify the assembly process. Mount structure that can can provide. Further, in the assembly structure including the mounting process of the CCD mount 18, the imaging surface of the CCD 16 can be a sealed structure at an early stage of assembly, and thereby a production process with a high yield can be constructed. Further, by using the dust-proof rubber 12 in which the O-ring 12c is integrally provided in the dust-proof rubber main body 12a, a highly airtight optical path space can be formed between the integrated dust-proof rubber main body 12a and the O-ring 12c. Thus, stable and reliable imaging output can be achieved for a long time in an environment where imaging dust is scattered.

  In the above-described embodiment, the mount structure using the CCD as the area image sensor is shown as an example. However, the present invention is not limited to this. For example, when a CMOS image sensor is used as the area image sensor, Is possible. The other constituent elements other than the constituent elements are not limited to the above-described embodiments as they are, and various modifications can be made without departing from the scope of the invention at the stage of implementation.

The disassembled perspective view which shows the mount structure which concerns on embodiment of this invention. The perspective view which shows a set of assembly structure of the mount structure which concerns on the said embodiment. The side cross section which expands and shows a part of a set of assembly structure of the mount structure which concerns on the said embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Lens mount, 12 ... Dust-proof rubber 12, 12a ... Dust-proof rubber main body, 12b ... Bending part, 12c ... O-ring, 12d ... Support frame part, 12e ... Convex-shaped convex part, 13 ... Holder (pressing member), Reference numeral 13a: locking portion, 13b: concave groove for fitting, 14: light shielding plate, 15: cover glass, 16: area image sensor (CCD), 17: imaging surface (light receiving surface), 18: sensor mount (CCD mount)

Claims (3)

A lens mount, a sensor mount attached to the lens mount, an area image sensor provided in the sensor mount, and a dustproof structure provided between the lens mount and the area image sensor;
The dust-proof structure includes a holder attached to the sensor mount, a light shielding plate and a cover glass,
A dust-proof rubber body having a support frame for supporting the holder, the light-shielding plate and the cover glass in a stacked state;
And an O-ring that is integrally provided on the dust-proof rubber main body via a bent portion, and that is folded from the bent portion and clamps and fixes the holder, the light shielding plate, and the cover glass to the support frame portion of the dust-proof rubber. A structure for mounting an electronic imaging camera, characterized by comprising:   The dust-proof rubber main body is formed integrally with the O-ring through a pair of parallel bent portions, the support frame portion is formed on one surface, and the imaging surface circumference of the area image sensor is formed on the other surface. The mounting structure for an electronic imaging camera according to claim 1, wherein a close contact surface portion that is in close contact with the portion is formed.   The O-ring has a fitting structure that fits into the holder on a bending-side surface portion that is bent through the bent portion, and the O-ring is folded from the bent portion, so that the holder, the light shielding plate, and An assembly structure in which the holder, the light shielding plate, the cover glass, the dust-proof rubber main body, and the O-ring are combined is configured by including a cover glass and fitting the fitting structure into the holder. The mount structure for an electronic imaging camera according to claim 1.

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