KR20200085157A - Camera assembly for vision inspection having a protective structure - Google Patents

Abstract

The present invention is to provide a camera assembly for vision inspection having a protective structure, capable of preventing foreign substances or fumes from being introduced thereinto and facilitating replacement of a protective filter for protecting a camera lens. The present invention discloses a camera assembly for vision inspection having the protective structure, comprising: a housing; a lens module mounted inside the housing; a front plate mounted in the housing to be positioned in the front of the lens module; a protective light transmitting plate positioned on the front of the front plate to protect the lens module; a packing foam interposed between the front plate and the protective light transmitting plate; and a fixing bracket positioned in the front of the protective light transmitting plate, mounted on the front plate, and fixing the protective light transmitting plate.

Description

Camera assembly for vision inspection having a protective structure

The present invention relates to a camera assembly, and more particularly, to a camera assembly for vision inspection having a protective structure used for welding inspection and the like.

In general, a vision inspection camera is used to track a weld seam during welding or to check the welding status in real time. Such a vision inspection camera is mainly used in a harsh environment in which a large amount of gas is generated even at a high temperature.

In particular, a large amount of spatter occurs during arc welding, and when the spatter bounces on the lens, it adheres as it is and acts as a factor that degrades image quality. Therefore, conventionally, in order to prevent this, there is a case where a protective filter is mounted in front of the camera lens. However, even when the protective filter is mounted, if the spatter is attached to the front side of the protective filter, it must be replaced. However, since the replacement operation is not easy, there is a problem in that it is cumbersome to use and cannot secure the sealing performance.

Specifically, looking at the structure of a conventional vision inspection camera, it includes a camera module equipped with an imaging device and a housing accommodating the camera module, and a drive unit for automatically adjusting the focus of the camera is provided inside the housing. have.

Such a conventional vision inspection camera is a structure in which the camera module is exposed to the outside, and thus cannot guarantee a sealing performance, so that fume or foreign substances are introduced into the device, thereby causing an internal imaging device or electronic circuit Damaged issues are being raised. In addition, when imaging is performed while the spatter generated during welding is attached to the front surface of the protective filter, there is a problem that a good image quality cannot be guaranteed.

<Prior Literature 1>: Republic of Korea Patent Publication No. 2013-0012275 (published date: February 04, 2013)

The present invention was created to solve the above problems, it is possible to prevent foreign substances or fumes, etc. from entering the inside, and a protective structure that can easily replace the protective filter for the protection of the camera lens An object of the present invention is to provide a camera assembly for vision inspection.

According to an embodiment of the present invention for achieving the above object, a housing; a lens module mounted inside the housing; A front plate mounted to the housing to be located in front of the lens module; A protective light-transmitting plate positioned on the front surface of the front plate to protect the lens module; A packing foam interposed between the front plate and the protective light-transmitting plate; And it is located on the front of the protective light-transmitting plate is mounted on the front plate to provide a camera assembly for vision inspection having a protective structure comprising a fixing bracket for fixing the protective light-transmitting plate.

The front plate is formed with a filter mounting hole in the center, and mounting slits are formed in the longitudinal direction at the top and bottom of the front plate, and the fixing bracket is formed with an open area having a certain area in the center, and the fixing bracket The upper and lower portions may be formed with fixing hooks which are fixed to the mounting slits of the front plate, respectively.

The upper end of the fixing bracket may be bent to one side of the fixing hook to extend the grip portion for releasing the fixing state.

The gripping portion of the front plate may be formed in an inclined shape so that the edge of the front plate is guided when the front plate is mounted.

The front plate may be equipped with at least one light emitting member, and the filter mounting hole may be equipped with an optical filter.

The front plate may be formed such that the thickness becomes thinner from the top to the bottom of the front plate, so that the protective light-transmitting plate is mounted inclined downward from the front of the front plate.

The front plate may be formed with a concave end concavely formed in a predetermined area in front of the front plate, and a protruding end inserted into the inside of the housing at a certain depth may be formed at the rear side of the front plate.

According to the present invention, the protective light-transmitting plate can be easily replaced by removing the fixing bracket from the front of the housing, and the lens module can be kept sealed inside the housing to prevent foreign substances or fumes from entering. It has an effect.

1 is a perspective view of a camera assembly for vision inspection having a protective structure according to an embodiment of the present invention,
Figure 2 is an exploded perspective view of a camera assembly for vision inspection having a protective structure according to an embodiment of the present invention,
Figure 3a is a front view of the camera assembly for vision inspection having a protective structure according to an embodiment of the present invention,
Figure 3b is a cross-sectional view of AA of Figure 3a,
4A and 4B are perspective views of a fixing bracket of a camera assembly for vision inspection having a protective structure according to an embodiment of the present invention, and
5A and 5B are perspective views of a front plate of a camera assembly for vision inspection having a protective structure according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be interpreted as being limited to ordinary or dictionary meanings, and the inventor appropriately explains the concept of terms in order to explain his or her invention in the best way. Based on the principle that it can be defined, it should be interpreted as meanings and concepts consistent with the technical spirit of the present invention. In addition, unless otherwise defined in the technical terminology and scientific terminology used, it has a meaning commonly understood by a person skilled in the art to which this invention belongs. In the following description and accompanying drawings, descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted. The accompanying drawings are provided as an example in order to sufficiently convey the spirit of the present invention to those skilled in the art. Therefore, the present invention is not limited to the drawings presented below and may be embodied in other forms. In addition, the same reference numbers throughout the specification indicate the same components. It should be noted that the same components in the drawings are indicated by the same reference numerals wherever possible.

Referring to FIG. 1, a camera assembly for vision inspection having a protective structure of the present invention is installed in a state in which a lens module 50 is accommodated inside the housing 10, and a fixed bracket 20 is provided in front of the housing 10. ), the protective light-transmitting plate 30 is mounted. Meanwhile, a mount portion 11 for fixing the device is formed at an upper end of the housing 10.

Referring to FIG. 2, the front plate 70, the optical filter 40, the packing foam 35, the protective light-transmitting plate 30, and the fixing bracket 20 are sequentially coupled to the front of the housing 10. .

In the above-described configuration, fixing bolts B1 and B2 are mounted through the top and bottom, respectively, to fix the front plate 70 at the front end of the housing 10.

5A and 5B, upper mounting slits 72a and lower mounting slits 72b are formed in the longitudinal direction at upper and lower ends of the front plate 70, respectively. In addition, a concave end 73 formed concave inward is formed in front of the front plate 70. A plurality of LED mounting holes 70h are formed in the concave end 73. In addition, a filter mounting hole 71 is formed in the center of the front plate 70.

At the rear of the front plate 70, a protruding end 74 protrudingly formed with a predetermined width is formed, and the protruding end 74 is fixed bolt (B1) to the fastening hole 76h while being inserted into the front end of the housing 10 ,B2) is installed by fastening. In addition, the LED mounting grooves 75 are formed on both sides on the plane of the protruding end 74. An LED module (not shown) is mounted in the LED mounting groove 75.

Referring to FIG. 2 again, the optical filter 40 is coupled to the filter mounting hole 71 of the front plate 70. In this case, the optical filter 40 may be applied with a filter having an optical function such as an ND filter or an IR filter.

A packing foam 35 is mounted in front of the circumference of the concave end 73 of the front plate 70. At this time, the packing foam 35 is in a contracted state by the pressing force of the fixed bracket 20 mounted in the front so that the sealing is made between the protective light-transmitting plate 30 and the front plate 70. Here, the material of the packing foam 35 may be made of various packingable materials. For example, a sponge, natural rubber, or foamed resin may be applied.

A protective light-transmitting plate 30 is mounted in front of the packing foam 35. At this time, the protective light-transmitting plate 30 may be a glass or a transparent plastic having high light transmittance, but it is more preferable to employ a transparent glass that can be applied to a high-temperature environment (high-temperature environment following welding).

At this time, the protective light-transmitting plate 30 is fixedly installed in a state pressed to one side by a fixing bracket 20 to closely contact the packing foam 35.

Referring to Figures 4a and 4b, specifically, the fixing bracket 20 is made of a metal material, the upper and lower ends of the fixing hooks 23a, 23b are formed, and the center is opened to have a certain area for light transmission Regions 21 are formed, and guide portions 22 are guided to both sides of the front plate 70 when mounted on both sides.

3A and 3B, the fixing bracket 20 has a first fixing hook 23a at an upper end fixed in an upper mounting slit 72a of the front plate 70. At this time, the gripping portion 23 is extended to the upper portion of the first fixing hook 23a. In addition, the gripping portion 23 and the first fixing hook 23a may be bent in an inclined shape toward the front. Accordingly, when the fixing bracket 20 is mounted, when the edge of the front plate 70 comes into contact, it is naturally guided through the inclined first fixing hook 23a and is bent and mounted.

That is, the fixing bracket 20 is a state in which the first fixing hook 23a is bent by the upper side of the front plate 70 while the second fixing hook 23b is positioned in the lower mounting slit 72b. It is located in the mounting slit 72a. That is, this state forms a fixed state of the fixing bracket 20. At this time, in the fixed bracket 20, the protective light-transmitting plate 30 is fixed to the front plate 70 in a state in which it is inserted, and the protective light-transmitting plate 30 is compressed by the fixing bracket 20 to shrink the packing foam 35. It is fixedly installed.

On the other hand, when the fixing bracket 20 is removed, it can be easily removed by pulling the gripping portion 23 extending from the first fixing hook 23a to detach the first fixing hook 23a from the upper mounting slit 72a. .

In the above configuration, the front plate 70 is formed to have a thinner thickness from the top to the bottom. Accordingly, the protective light-transmitting plate 30 mounted on the front side is also arranged to be inclined at a predetermined angle downward. The protective transmissive plate 30 is inclined to prevent diffuse reflection due to sparks during welding imaging to obtain better image quality.

In addition, the PCB 25 for LEDs is mounted below the front plate 70. On the other hand, the LED member 60 mounted on the front plate 70 illuminates light forward when imaging, so that a good image can be obtained even in a dark environment.

The camera assembly for vision inspection having the protection structure of the present invention configured as described above is mounted inside the housing 10 by mounting the front plate 70 on the front of the housing 10 and mounting the optical filter 40 on the front plate 700. In can maintain the sealed state of the camera module 50. Accordingly, it is possible to prevent the fume or other foreign matter generated during welding from entering the camera module 50.

In addition to this, the present invention prevents the spatter generated during welding from being directly attached to the lens by fixing the protective light-transmitting plate 30 to the front side of the front plate 70 through the fixing bracket 20, and fixed as necessary Since the bracket 20 can be easily detached from the front plate 70, it is easy to replace the protective light-transmitting plate 30.

In addition, by installing the packing foam 35 between the protective light-transmitting plate 30 and the front plate 70, it is possible to further improve the sealing performance of the device.

In the above, the present invention has been illustrated and described with respect to specific embodiments, but the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention pertains may describe the present invention as set forth in the claims below. Any number of changes can be made without departing from the scope of the technical spirit of the invention.

10: housing
20: fixed bracket
21: open area
22: Information
23: gripping part
23a: first fixing hook
23b: second fixing hook
30: protective floodlight
35: Packing foam
40: optical filter
50: camera module
60: LED member
70: front plate
71: filter mounting hole

Claims (7)

housing;
A lens module mounted inside the housing;
A front plate mounted to the housing to be located in front of the lens module;
A protective light-transmitting plate positioned on the front surface of the front plate to protect the lens module;
A packing foam interposed between the front plate and the protective light-transmitting plate; And
A camera assembly for vision inspection having a protective structure, characterized in that it comprises a fixing bracket for fixing the protective light-transmitting plate, which is located in front of the protective light-transmitting plate and is mounted on the front plate. According to claim 1,
A filter mounting hole is formed in the center of the front plate, and mounting slits are formed in the longitudinal direction at the top and bottom of the front plate, respectively.
The fixed bracket has an open area having a predetermined area in the center, and the upper and lower ends of the fixed bracket are provided with a fixed hook fixed to each of the mounting slits of the front plate for vision inspection with a protective structure. Camera assembly. According to claim 2,
A camera assembly for vision inspection having a protective structure, characterized in that a gripping portion for releasing a fixed state is extended by bending to one side of the fixed hook at an upper end of the fixed bracket. According to claim 3,
The gripping portion of the front plate is a camera assembly for vision inspection having a protective structure, characterized in that formed in an inclined shape so that the edge of the front plate is guided when the front plate is mounted. According to claim 1,
At least one light emitting member is mounted on the front plate, and a camera assembly for vision inspection having a protective structure, characterized in that an optical filter is mounted on the filter mounting hole. According to claim 4,
The front plate is formed to be thinner as it goes from the top to the bottom, a camera assembly for vision inspection having a protective structure, characterized in that the protective light-transmitting plate is mounted inclined downward in front of the front plate. According to claim 2,
A concave end concavely formed in a predetermined area is formed in front of the front plate,
A camera assembly for vision inspection having a protective structure, characterized in that a protruding end inserted at a certain depth inside the housing is formed at a rear side of the front plate.

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