JP2017026561A - Housing, apparatus, lighting device, coaxial lighting device, and method for manufacturing housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a housing which has a sufficient heat-dissipating performance and is low in manufacturing cost, particularly, a lighting device and a coaxial lighting device having the housing.SOLUTION: There is provided a housing having a first wall face portion on which a heat-generating body is arranged and a second wall face portion that is arranged so as to surround the heat-generating body together with the first wall face, where the second wall face portion is made from a resin, and the first wall face portion is made from a material having higher thermal conductivity than that of the resin.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a housing, and more particularly, to a housing such as a coaxial lighting device.

  Coaxial illumination is an illumination method in which the optical axis of illumination that irradiates an object coincides with the optical axis of a camera that observes the object. According to the coaxial illumination, the optical axis of the illumination coincides with the optical axis of the camera, so that the camera can capture the regular reflection light on the surface of the object. For this reason, according to the coaxial illumination, it is possible to catch a defect, a foreign object, or the like on the surface of an object that cannot be clearly seen with diffusely reflected light.

  A coaxial illumination device is a device including an optical system for performing coaxial illumination with a light source. As the light source, for example, an LED (Light Emitting Diode), a light emitting element such as a semiconductor laser, or a light bulb such as a halogen lamp is used. The optical system uses, for example, a half mirror to align the optical axis of illumination with the optical axis of the camera.

  Usually, the casing of the coaxial illumination device is made of a metal plate. This is because it is suitable for radiating the heat emitted from the light source. In general, a high-luminance light source emits high heat. Therefore, particularly in an illumination device including a high-luminance light source such as a coaxial illumination device, the housing is required to have heat dissipation and heat resistance. For this reason, metal is generally used for the housing of this type of lighting device.

  An example of a conventional coaxial illumination device is described in Patent Document 1. In addition, although the cylinder 11 is described in patent document 1 as a housing | casing of a coaxial illuminating device, it is not described about what the cylinder 11 is made of.

JP 2006-046946 A

  A metal housing is advantageous in terms of heat dissipation from the light source, but has a higher manufacturing cost than, for example, a resin. However, a general casing made of only resin cannot sufficiently radiate the heat generated from the light source. In addition to lighting devices, there are devices that incorporate various heat generators and adopt a metal casing for heat dissipation. In such an apparatus, it was difficult to reduce the manufacturing cost of the casing.

  The present invention has been made in view of such a situation, and a problem to be solved by the present invention is a housing having sufficient heat dissipation performance and low manufacturing cost, in particular, an illumination device including such a housing. It is to provide a coaxial lighting device.

  The inventor has repeatedly studied to reduce the cost of the lighting device. As a result, most of the housing costs are reduced by adopting a housing structure that encloses a part of the housing including the back of the light source with a highly heat radiating member such as a metal plate and surrounds the other portions with resin. It has been found that it is possible to sufficiently dissipate the heat generated by the light source while using an inexpensive resin.

  The present invention has been made based on this finding. In order to solve the above-described problems, the present invention includes, as one aspect thereof, a first wall surface portion for disposing a heating element, and a second wall surface disposed so as to surround the heating element together with the first wall surface. The second wall surface portion is made of resin, and the first wall surface portion provides a housing made of a material having higher thermal conductivity than the resin. The first wall surface portion is made of, for example, a metal plate. In order to avoid the influence of the heat generated by the heating element, it is preferable that the second wall surface portion made of resin is disposed away from the heating element.

  It has a hollow substantially rectangular parallelepiped shape, the first wall surface portion may constitute at least two adjacent surfaces of the substantially rectangular parallelepiped, and the second wall surface portion may constitute another surface of the substantially rectangular parallelepiped.

  For example, the first wall surface portion is made of a bent metal plate, and the first wall surface portion is a first surface for disposing a heating element, a second surface adjacent to the first surface in a substantially rectangular parallelepiped, approximately A third surface adjacent to the first surface on the opposite side of the second surface in the rectangular parallelepiped, a first bent portion located between the first and second surfaces, and a first surface and a third surface; It is conceivable to include a second bent portion located between them.

  Alternatively, the first wall surface portion is made of a bent metal plate, and the first wall surface portion is a first surface for disposing the heating element, a second surface adjacent to the first surface in a substantially rectangular parallelepiped, and It is good also as providing the bending part located between a 1st and 2nd surface.

  A nut hole for inserting an insert nut is provided in the second wall surface portion, an insert nut inserted into the nut hole is provided, a bolt for fastening with the insert nut is provided, and a through hole through which the bolt passes is first The first and second wall surfaces may be fixed to each other by fastening the bolt that penetrates the through-hole to the insert nut.

  In that case, it is preferable to be prepared by a 3D printer with a nut hole.

  Moreover, this invention provides the apparatus provided with the above-mentioned housing | casing and a heat generating body as the one aspect | mode.

  This apparatus preferably further includes a heat conductive sheet disposed between the heating element and the first wall surface portion.

  A typical example of such a device is a lighting device including a light source as a heating element. As the light source, for example, light emitting elements such as LEDs and semiconductor lasers, lamps, and particularly high-intensity lamps such as halogen lamps, xenon lamps, and krypton lamps are conceivable.

  As an example of such an illuminating device, an illuminating device that is used as a light source when an object is imaged by a camera, and further includes an optical system for matching the optical axis of the camera and the optical axis of the light source. Can be considered.

  More specifically, the optical system includes a half mirror, and the light emitted from the light source is reflected by the half mirror and applied to the surface of the object, and the light reflected by the surface of the object is transmitted through the half mirror. A coaxial illumination device that is incident on the camera can be considered.

  Alternatively, another type of coaxial illumination device, that is, the optical system includes a half mirror, and the light emitted from the light source passes through the half mirror and is irradiated on the surface of the object, and the light reflected on the surface of the object is A coaxial illumination device that is reflected by a half mirror and incident on the camera may be used.

  Moreover, this invention includes the step which creates the housing | casing which has a nut hole for embedding an insert nut by laminating | stacking resin using a 3D printer as one aspect | mode, and the step which embeds an insert nut in a nut hole. The manufacturing method of the housing | casing characterized by the above-mentioned is provided. For example, it is good also as manufacturing the housing | casing of an illuminating device. The illumination device is, for example, a coaxial illumination device.

  According to the present invention, even in a device including a heating element, most of the casing can be made of resin, so that the manufacturing cost of the casing can be reduced. Therefore, it is possible to reduce the manufacturing cost of a device in which a heating element is built in such a case, specifically, for example, a lighting device or a coaxial lighting device.

It is a perspective view of the illuminating device 1 which is the 1st Embodiment of this invention. It is the top view of the illuminating device 1, a front view, a bottom view, and a right view. It is the front view of the 1st wall surface part 11 of the illuminating device 1, a bottom view, and a right view. It is a top view, a front view, a bottom view, and a right side view of the left block 12L in the second wall surface portion 12 of the lighting device 1. 3 is a plan view of a diffusion plate 13 of the lighting device 1. FIG. It is the front view and right view of LED board 14 of the illuminating device 1. FIG. FIG. 3 is a schematic cross-sectional view for explaining the positional relationship between the LED substrate 14 and the first wall surface portion 11 inside the lighting device 1. It is a perspective view of the coaxial illuminating device 100 which is the 2nd Embodiment of this invention. It is the top view of the coaxial illuminating device 100, a front view, a bottom view, and a left side view. FIG. 4 is a plan view, a front view, a bottom view, and a left side view of a first wall surface portion 101 of the coaxial lighting device 100. 4 is a plan view, a front view, a bottom view, a left side view, and a right side view of a second wall surface portion 102 of the coaxial lighting device 100. FIG. 3 is a front view of a diffusion plate 103 of the coaxial illumination device 100. FIG. 3 is a front view of a resin cover 104 of the coaxial illumination device 100. FIG. 3 is a front view of a half mirror 109 of the coaxial illumination device 100. FIG. It is the top view and right view of LED board 140 of the coaxial illuminating device 100. 3 is a front view of a heat conductive sheet 150 of the coaxial lighting device 100. FIG. 3 is a schematic cross-sectional view for explaining the positional relationship among the first wall surface portion 101, the LED substrate 140, and the heat conductive sheet 150 in the coaxial illumination device 100. FIG. It is a perspective view of the coaxial illuminating device 200 which is a deformation | transformation of the 2nd Embodiment of this invention. It is the top view of the coaxial illuminating device 200, a front view, a bottom view, and a left side view. FIG. 6 is a plan view, a front view, a bottom view, and a left side view of a first wall surface portion 201 of the coaxial lighting device 200. It is the top view of the 2nd wall surface part 202 of the coaxial illuminating device 200, a front view, a bottom view, a left side view, and a right side view.

(First embodiment)
The lighting device 1 according to the first embodiment of the present invention will be described. As shown in FIGS. 1 and 2, the lighting device 1 includes a first wall surface portion 11, a second wall surface portion 12, and a diffusion plate 13. Bolts 14 and 16 fix the second wall surface portion 12 to the first wall surface portion 11. The bolt 15 fixes the diffusion plate 13 to the second wall surface portion 12. As will be described later, a light source is incorporated in the interior surrounded by the first wall surface portion 11, the second wall surface portion 12, and the diffusion plate 13, and a cable 17 is used to supply power to the light source. It is.

  The first wall surface portion 11 is a frame made of a metal plate. As shown in FIG. 3, this frame has a shape obtained by bending a rectangular metal plate into a U-shaped cross section. Bolt holes 21 and 22 are holes through which bolts 14 and 16 pass, respectively. Note that FIG. 3 has the same direction as the front view of FIG.

  The 2nd wall surface part 12 is two blocks made from resin, and the metal insert nut is embedded in each. An example of the resin is ABS (Acrylonitrile butadiene styrene) resin. These blocks are arranged at the left and right ends in the front view of the first wall surface portion 11 in FIG. The leftmost block is called a block 12L, and the rightmost block is called a block 12R.

  Referring to FIG. 4, the block 12 </ b> L includes insert nuts 31, 32, and 33. 4 is a front view of the left side surface in FIG. The insert nuts 31, 32, and 33 are fastened to the bolts 11, 14, and 15, respectively, in order. The bolts 11, 14, 15 and the insert nuts 31, 32, 33 are made of metal, and by fastening them together, the first wall surface portion 11, the second wall surface portion 12, and the diffusion plate 13 can be connected to each other with sufficient force. Can be fixed. The groove 34 is a groove into which the left end of the LED substrate 40 described later is fitted. Since the block 12R has a shape obtained by horizontally inverting the block 12L, description thereof is omitted here.

  The diffusion plate 13 is made of, for example, acrylic resin, glass, polycarbonate, or the like. As shown in FIG. 5, the diffusion plate 13 includes a bolt hole 36 through which the bolt 15 passes. By diffusing the light emitted from the LEDs 42 on the LED substrate 40 with the diffusion plate 13, uneven illumination is eliminated.

  The LED substrate 40 is a light source of the lighting device 1 and includes a substrate 41 and an LED (Light Emitting Diode) 42 as shown in FIG. A total of 14 LED elements 42 are arranged on the substrate 41.

  As shown in FIG. 7, the LED substrate 40 is supported along the bottom surface of the first wall surface portion 11 by the second wall surface portion 12 (blocks 12L and 12R). For this reason, heat radiation from below the LED substrate 40 is transmitted to the bottom surface of the first wall surface portion 11 through the space 43. Since the first wall surface portion 11 is formed by bending a single metal plate into a U-shape, the heat transferred to the bottom surface of the first wall surface portion 11 is further divided into two planes adjacent to the bottom surface, that is, It is transmitted to two planes standing upright from the bottom. As a result, the heat generated by the LED substrate 40 is radiated from the entire first wall surface portion 11 to the atmosphere.

  Thus, since the housing | casing of the illuminating device 1 is provided with the 1st wall surface part 11 which consists of metals, and the 2nd wall surface part 12 which consists of resin, compared with the case where the whole housing | casing is created with a metal plate. Manufacturing costs can be kept low. In particular, it is preferable to create the second wall surface portion 12 by an ABS resin or the like using a 3D printing technique such as a hot melt lamination method. In that case, since it is possible to create a state in which the hole, groove 34 and hole 35 for embedding the insert nuts 31, 32, 33 are formed in the second wall surface portion 12, such as drilling or grooving Work can be omitted. As a result, the cost can be further reduced compared to the case where a resin casing is formed by injection molding.

(Second Embodiment)
A coaxial illumination device 100 according to the second embodiment of the present invention will be described. 8 and 9, the coaxial lighting device 100 includes a first wall surface portion 101, a second wall surface portion 102, a diffusion plate 103, a resin cover 104, an LED substrate 140, and a heat conductive sheet 150. The first wall surface portion 101 is fixed to the second wall surface portion 102 by metal bolts 105 and 106. The diffusion plate 103 is held by the first wall surface portion 101 and the second wall surface portion 102. The resin cover 104 is fixed to the second wall surface portion 102 with bolts 107. When photographing an object with a camera, the resin cover 104 is disposed to face a lens of a camera (not shown), and the opening 112 is disposed to face an object to be imaged with the camera. The optical axis between the lens of the camera and the half mirror 109 and the optical axis between the half mirror 109 and the surface of the object are collinear.

  The first wall surface portion 101 will be described with reference to FIG. FIG. 10 is a front view of the right side surface in FIG. The first wall surface portion 101 is formed by bending a single rectangular metal plate so as to have a substantially L-shaped cross-sectional shape (or a cross-sectional shape obtained by extending the lower side of the U-shape). That is, the first wall surface portion 101 has three planes, surfaces 101A, 101B, and 101C, which are orthogonal to each other. When the first wall surface portion 101 and the second wall surface portion 102 are fixed to each other, the bolt 105 penetrates the bolt hole 110 and the bolt 106 penetrates the bolt hole 111. An opening 112 is provided in the surface 101A.

  The second wall surface portion 102 is a box-shaped housing made of resin, except for the metal insert nuts 121, 122, 123. Of the surfaces forming a rectangular parallelepiped, the right side surface and the bottom surface shown in FIG. 11 are provided. Not. When the first wall surface portion 101 and the second wall surface portion 102 are assembled, the first wall surface portion 101 forms these two surfaces to form a substantially rectangular parallelepiped. The front view of FIG. 11 is a view in which the same direction as FIG.

  The second wall surface portion 102 includes metal insert nuts 121, 122, and 123. Insert nuts 121, 122, and 123 correspond to bolts 105, 106, and 107, respectively. The first wall surface portion 101 and the second wall surface portion 102 are fixed to each other by fastening the bolts 105 and 106 and the insert nuts 121 and 122. The resin cover 104 and the second wall surface portion 102 are fixed to each other by fastening the bolt 107 and the insert nut 123.

  Of the second wall surface portion 102, grooves 124 and 125 are respectively provided on the back side of the paper surface of the wall surface illustrated in the front view of FIG. 11 and on the front surface side of the wall surface facing the surface. The diffusion plate 103 is fixed by covering the first wall surface portion 101 with the diffusion plate 103 fitted in the groove 124 in the second wall surface portion 102. Similarly, the half mirror 109 is fixed by covering the first wall surface portion 101 with the half mirror 109 fitted in the groove 125. An opening 126 for the optical axis from the camera lens to reach the half mirror 109 is provided on the upper surface (surface corresponding to the plan view) of the second wall surface portion 102 and is covered with the resin cover 104.

  When creating the second wall surface portion 102, it is preferable to use a 3D printing technique such as a hot melt lamination method. At that time, it is preferable that the holes are formed in the state where the holes and grooves 124 and 125 for embedding the insert nuts 121, 122 and 123 are formed. By doing in this way, operations, such as drilling and grooving, can be omitted from the process of creating the second wall surface portion 102. As a result, the cost can be further reduced compared to the case where a resin casing is formed by injection molding.

  As shown in FIG. 12, the diffusion plate 103 has a rectangular plate shape, and is made of, for example, acrylic resin, glass, polycarbonate, or the like. As described above, the diffusion plate 103 is fixed by the groove 124 provided in the second wall surface portion 102, and the diffusion plate 103 itself is not provided with a bolt hole or the like. By diffusing light emitted from the LED 142 of the LED substrate 140, which will be described later, by the diffusion plate 103, uneven illumination on the surface of the object is eliminated.

  The resin cover 104 is made of a substantially rectangular plate-shaped transparent resin. The resin cover 104 is for preventing the entry of dust or the like into the coaxial illumination device 100 while allowing the reflected light from the object to pass therethrough. As shown in FIG. 13, the resin cover 104 is provided with a convex portion on each of two opposing sides of a rectangular plate, and a bolt hole 131 is provided on each. When the bolt 107 passes through the bolt hole 131 and is fastened to the insert nut 123, the resin cover 104 is fixed to the second wall surface portion 102 so as to cover the opening 126.

  FIG. 14 shows a half mirror 109 indicated by a dotted line in FIG. The half mirror 109 is a rectangular half mirror, and is disposed inside the first wall surface portion 101, the second wall surface portion 102, the diffusion plate 103, and the resin cover 104. It acts as an optical system for matching the optical axis of the LED 142 of the LED substrate 140. In the coaxial illumination device 100, the light reflected by the surface of the object passes through the half mirror 109 and enters the camera.

  As shown in FIG. 15, the LED substrate 140 is obtained by disposing an LED (Light Emitting Diode) 142 on the substrate 141. In the present embodiment, the LED 142 is composed of a total of 42 LED elements arranged in a grid of 6 rows and 7 columns.

  The heat conductive sheet 150 is disposed on the surface of the substrate 141 opposite to the LED 142. Hereinafter, of the two surfaces of the substrate 141, the side on which the LEDs 142 are arranged is referred to as the front surface, and the opposite is referred to as the back surface. The heat conductive sheet 150 is a sheet made of a material having heat conductivity and flexibility, and is made of, for example, rubber, silicone, or acrylic. The heat conductive sheet 150 is disposed so as to be in close contact with the back surface of the substrate 141 without any gap, and efficiently transfers the heat generated by the LED 142 to the surface 101B of the first wall surface portion 101.

  The positional relationship among the first wall surface portion 101, the LED substrate 140, and the heat conductive sheet 150 in the coaxial lighting device 100 will be described with reference to FIG. The direction of FIG. 17 is the same as the left side view of FIG. As shown in the figure, the LED substrate 140 is disposed along the surface 101B of the first wall surface portion 101 with the heat conductive sheet 150 interposed therebetween. With such an arrangement, the heat generated by the LED 142 which is a light source and also a heating element is transmitted to the surface 101B through the heat conductive sheet 150. Furthermore, since the surfaces 101A, 101B, and 101C are formed by bending a single metal plate, the heat transmitted to the surface 101B is also transmitted to the adjacent surfaces 101A and 101C. For this reason, the heat generated by the LED 142 is radiated to the atmosphere from the three surfaces 101A, 101B, and 101C.

  The light emitted from the LED 142 passes through the diffusion plate 103, is reflected downward by the half mirror 109 in the front view of FIG. 9, and is reflected on the surface of the object (not shown) through the opening 112. This reflected light enters the coaxial illumination device 100 again from the opening 112, passes through the half mirror 109, and enters a camera lens (not shown) through the resin cover 104. In this way, the coaxial illumination device 100 irradiates the object with light on the same optical axis as the camera.

(Modification of the second embodiment)
In the above-described coaxial illumination device 100, the light emitted from the LED 142 is reflected by the half mirror 109 and applied to the surface of the object, and the light reflected by the surface of the object passes through the half mirror 109 and enters the camera. Is done. On the other hand, in the coaxial illumination device 200, the light emitted from the LED is transmitted through the half mirror and irradiated on the surface of the object, and the light reflected on the surface of the object is reflected by the half mirror and enters the camera. Is done.

  In the coaxial illumination device 100, the opening 112 is provided on the surface 101A of the first wall surface portion 101 (FIGS. 9 and 10). On the other hand, in the coaxial lighting device 200, the opening 212 is provided on the left side surface (FIG. 21) of the second wall surface portion 202. In addition, although the reference number of each element of the coaxial lighting device 100 is 1 in the hundreds, each element of the coaxial lighting device 200 has a hundreds of the reference number of the corresponding element of the coaxial lighting device 100. 2 was assigned.

  Regarding the diffusion plate 203, the resin cover 207, the half mirror 209, the LED substrate 240, and the heat conduction sheet 250, the diffusion plate 103, the resin cover 107, the half mirror 109, the LED substrate 140, and the heat conduction sheet 150 of the coaxial lighting device 100, respectively. Therefore, the description of the coaxial illumination device 100 and the reference numerals in FIGS. 12 to 16 should be appropriately replaced.

  Similarly, regarding the positional relationship among the first wall surface portion 201, the LED substrate 240, and the heat conductive sheet 250 in the coaxial illumination device 200, the description of the coaxial illumination device 100 described above and the reference numerals in FIG. Please read as appropriate. As can be seen by replacing the reference numerals, the LED substrate 240 is disposed along the surface 201B of the first wall surface portion 201 with the heat conductive sheet 250 interposed therebetween. With such an arrangement, the heat generated by the LED 242 that is a light source and also a heating element is transmitted to the surface 201 </ b> B through the heat conductive sheet 250. Furthermore, since the surfaces 201A, 201B, and 201C are formed by bending a single metal plate, the heat transmitted to the surface 201B is also transmitted to the adjacent surfaces 201A and 201C. For this reason, the heat generated by the LED 242 is radiated to the atmosphere from the three surfaces 201A, 201B, and 201C.

  When photographing an object with a camera, the resin cover 104 is disposed so as to face the lens of a camera (not shown), and the opening 212 is disposed so as to face the object. Since the opening 212 is provided on the left side in FIG. 19, the optical axis from the camera lens toward the half mirror 209 and the optical axis from the half mirror 209 toward the surface of the object are orthogonal to each other.

  In the coaxial illumination device 200 as well, it is preferable to use a 3D printing technique such as a hot melt lamination method when the second wall surface portion 202 is formed. In that case, it is also preferable to create the holes in which the holes and grooves 224 and 225 for embedding the insert nuts 221, 222 and 223 are formed. By doing in this way, operations, such as drilling and grooving, can be omitted from the creation process of the second wall surface portion 202. As a result, the cost can be further reduced compared to the case where a resin casing is formed by injection molding.

(Other)
It goes without saying that the present invention is not limited to the above-described embodiment, and the design can be changed according to the purpose and application.

  For example, in the above-described embodiment, it has been described that the hot melt lamination method is used as a 3D printing method for manufacturing the resin casing. Since the second wall surface portions 102 and 202 can be formed in the state where the holes and grooves 124, 125, 224, and 225 for embedding the nuts 121 to 123 and 221 to 223 are formed, respectively, the same cost reduction effect can be obtained. Can be obtained. Other applicable 3D printing techniques include, for example, forming a cross-sectional shape of each layer by irradiating a liquid photo-curable resin with an ultraviolet laser, and laminating an adhesive to a powder resin. Thus, a powder fixing method or the like in which the cross-sectional shape of each layer is formed and laminated may be used.

  Moreover, although LED was used as the light source arrange | positioned in a housing | casing in the above-mentioned embodiment, another light emitting element, specifically, an organic electroluminescent element and a semiconductor laser element may be sufficient. Alternatively, a light bulb such as a halogen lamp or a xenon lamp may be used.

  In the above-described embodiment, the light source is exemplified as the heating element. However, the light source is not limited to the light source as long as it generates heat. Examples of other heating elements include a coil and a resistance element. It will be apparent to those skilled in the art that a similar heat dissipation effect can be obtained if such other heating elements are disposed on the surface 101B of the first wall surface portion 101 instead of the LED substrate 140, for example. In addition, the second wall surface portion 102 combined with the first wall surface portion 101 is provided with a hole for embedding an insert nut, a groove for arranging other parts inside the housing, such as grooves 124 and 125, and the like. It will be apparent to those skilled in the art that if the 3D printer is used, the material cost can be reduced as compared with the case where the entire housing is made of metal.

DESCRIPTION OF SYMBOLS 1 Illuminating device 11 1st wall surface part 12 2nd wall surface part 13 Diffusion plates 14, 15, 16 Bolt 17 Cable 21, 22 Bolt hole 12L, 12R Block 31, 32, 33 Insert nut 34 Groove 35 Hole 40, 140, 240 LED board 41, 141 board 42, 142 LED
43 Space 100, 200 Coaxial lighting device 101, 201 First wall surface portion 102, 202 Second wall surface portion 103, 203 Diffuser plate 104, 204 Resin cover 105, 106, 107, 205, 206, 207 Bolt 109, 209 Half Mirror 101A, 101B, 101C, 201A, 201B, 201C Surface 110, 111, 131, 210, 211 Bolt hole 112, 126, 212, 226 Opening 121, 122, 123, 221, 222, 223 Insert nut 124, 125, 224 225 groove

Claims (15)

A first wall portion for arranging the heating element, and
A second wall surface portion for being arranged so as to surround the heating element together with the first wall surface;
The second wall surface portion is made of resin,
The first wall surface portion is a housing made of a material having higher thermal conductivity than the resin. It has a hollow, substantially rectangular parallelepiped shape,
The first wall surface portion constitutes at least two adjacent surfaces of the substantially rectangular parallelepiped,
The housing according to claim 1, wherein the second wall surface portion constitutes another surface of the substantially rectangular parallelepiped. The first wall portion is made of a bent metal plate,
The first wall surface portion includes a first surface for disposing the heating element, a second surface adjacent to the first surface in the substantially rectangular parallelepiped, and the first surface in the substantially rectangular parallelepiped. A third surface adjacent on the opposite side of the second surface, a first bent portion located between the first and second surfaces, and a second located between the first and third surfaces. The housing according to claim 2, further comprising a bent portion. The first wall portion is made of a bent metal plate,
The first wall surface portion includes a first surface on which the heating element is disposed, a second surface adjacent to the first surface in the substantially rectangular parallelepiped, and a space between the first and second surfaces. The housing | casing of Claim 2 provided with the bending part located in. A nut hole for inserting an insert nut is provided in the second wall surface portion,
An insert nut inserted into the nut hole;
A bolt for fastening with the insert nut;
The first wall surface part is provided with a through hole for the bolt to penetrate,
The case according to any one of claims 1 to 4, wherein the first and second wall surfaces are fixed to each other by fastening the bolt that has penetrated the through hole to the insert nut.   The housing according to claim 5, which is created by a 3D printer in a state where the nut hole is provided.   The apparatus provided with the housing | casing in any one of Claim 1 thru | or 6, and the said heat generating body.   The apparatus of Claim 7 further provided with the heat conductive sheet arrange | positioned between the said heat generating body and the said 1st wall surface part.   The illumination device according to claim 7, comprising a light source as the heating element.   The illumination device used as a light source when imaging an object with a camera, the coaxial illumination device further comprising an optical system for matching the optical axis of the camera and the optical axis of the light source. 9. The illumination device according to 9. The optical system includes a half mirror,
The light emitted from the light source is reflected by the half mirror and applied to the surface of the object,
The light reflected from the surface of the object passes through the half mirror and enters the camera.
The coaxial illumination device according to claim 10. The optical system includes a half mirror,
The light emitted from the light source is transmitted to the surface of the object through the half mirror,
The light reflected by the surface of the object is reflected by the half mirror and incident on the camera.
The coaxial illumination device according to claim 10. Creating a housing having a nut hole for embedding an insert nut by laminating resin using a 3D printer;
The manufacturing method of a housing | casing characterized by including the step of embedding an insert nut in the said nut hole.   The manufacturing method of the housing | casing of Claim 13 which manufactures the housing | casing of an illuminating device as the said housing | casing.   The method of manufacturing a housing according to claim 14, wherein the lighting device is a coaxial lighting device.

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