JP7193056B2 - Linear illumination device - Google Patents

Description

The present invention relates to linear illumination devices.

Conventionally, in quality inspection using imaging by a CCD camera or the like, a lighting device is used to linearly illuminate the surface of an object to be inspected. For example, the lighting device disclosed in Patent Document 1 includes a plurality of LEDs fixed to the top plate surface of the lighting device main body, a rod lens housed in the lighting device main body and positioned below the LEDs, and bolts that are connected to the lighting device main body. and a diffusing lens attached to the lower end of the LED, and the light emitted from each LED is irradiated onto the irradiation surface via the rod lens and the diffusing lens.

JP 2007-225591

When the LED deteriorates and needs to be replaced, in the configuration of Patent Document 1, the LED cannot be accessed unless the diffuser lens and the rod lens are removed from the lighting device main body, and optical parts such as the diffusion lens and the rod lens cannot be removed from the lighting device main body. There was a problem that the optical axis had to be adjusted again when attaching it to the camera, which took a lot of time and effort.

In addition, when optical parts made of resin are used, it may be necessary to replace the optical parts that have deteriorated over time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting device that facilitates access to the light source.

A lighting device according to the present invention includes a housing, a reflector housed in the housing, a cover member detachably attached to the housing, and a light source unit attached to the inner surface of the cover member. , the housing has a first surface and a second surface extending in a direction perpendicular to the first surface, the first surface being provided with a maintenance opening, and the second surface being provided with a light source. an irradiation port is provided, the cover member is attached to the housing to cover the maintenance opening, the light source unit has a substrate and a light source mounted on the substrate, and emits light from the light source. The reflected light is reflected in a direction toward the light irradiation port by the reflecting mirror, and is irradiated to the outside through the light irradiation port.

According to the lighting device of the present invention, since the light source unit is attached to the inner surface of the lid member, the light source unit can be easily accessed by simply removing the lid member from the housing. Further, since the maintenance opening to which the cover member is attached is provided on the first surface orthogonal to the second surface on which the light irradiation port is provided, the reinforcing metal fitting is attached to the bottom surface on the opposite side of the second surface. Even in this case, the light source unit can be accessed by removing the cover member without removing the reinforcing metal fitting.

1 is a front view of a lighting device according to an embodiment of the present invention; FIG. (a) is a sectional view taken along line II in FIG. 1, and (b) is a diagram showing a state in which a lid member is removed from the state shown in (a). 1. It is a figure which shows the state with which the illuminating device shown in FIG. 1 was mounted|worn with the reinforcement metal fitting, (a) is a side view, (b) is a front view.

A lighting device according to an embodiment of the present invention will be described below with reference to the accompanying drawings. 1 and 2, a lighting device 1 of the present embodiment is a linear lighting device that linearly illuminates an irradiation surface (not shown), and includes a housing 2 and a reflector housed in the housing 2. It has a mirror 3 , a cover member 4 detachably attached to the housing 3 , and a light source unit 5 attached to an inner surface 41 of the cover member 4 .

The housing 2 includes a pair of long side surfaces 2A and 2B extending in the longitudinal direction D1 of the lighting device 1 and facing each other in the short direction D2, and a long long side surface 2A and 2B extending in the longitudinal direction D1 perpendicular to the side surfaces 2A and 2B. a surface 2C and a bottom surface 2D. A maintenance opening H1 is provided on the side surface 2A (first surface), a light irradiation port H2 is provided on the surface 2C (second surface), and a transparent sealing plate 7 is fitted in the light irradiation port H2. there is

More specifically, the housing 2 includes a main body portion 20 having a first side wall 21 having a side surface 2B and a bottom wall 22 extending vertically from the lower end of the first side wall 21 and having a bottom surface 2D. Prepare. The housing 20 further includes a second side wall 23 opposed to and spaced from the first side wall 21 in the transverse direction D2. there is The second side wall 23 has a side surface 2A, and a stepped portion 23a having a crank-shaped cross section is provided at the lower edge of the second side wall 23 that defines the maintenance opening H1.

The reflecting mirror 3 has a reflecting surface 30 with a concave cross section and is fixed within the housing 2 . The lid member 4 covers the maintenance opening H1, and has a stepped portion 4a with a crank-shaped cross section that fits with the stepped portion 23a of the second side wall 23 at the upper end portion of the lid member 4. As shown in FIG. When attaching the lid member 4 to the housing 2 , the stepped portion 4 a of the lid member 4 is brought into contact with the stepped portion 23 a of the second side wall 23 for positioning, and fixed to the housing 2 using a plurality of screws 6 .

The light source unit 5 has a substrate 51 mounted on the inner surface 41 of the lid member 4, and a plurality of light sources 52 (only one is shown in FIG. 2) mounted on the substrate 51. The light sources 52 are LEDs are preferred. The substrate 51 extends along the longitudinal direction D1 of the illumination device 1, and the plurality of light sources 52 are arranged in a row along the longitudinal direction D1. Each light source 52 faces the reflecting surface 30 of the reflecting mirror 3, and the optical axis of each light source 52 is arranged perpendicular to the side surface 2A (parallel to the surface 2B). The light emitted from each light source 52 is reflected by the reflecting surface 30 of the reflecting mirror 3 in the direction toward the light irradiation port H2, and is irradiated to the outside through the light irradiation port H2.

In order to access the light source unit 5 in the illumination device 1 configured as described above, the screw 6 is removed and the cover member 4 is removed from the housing 2 together with the light source unit 5, so that the light source unit 5 can be easily replaced. can be done.

Here, if the length dimension of the illumination device 1 in the longitudinal direction D1 is several meters to 10 meters, a reinforcing metal fitting K is used as shown in FIG. 3 to prevent the illumination device 1 from bending. There are many things. Such a reinforcing metal fitting K is attached so as to abut on the bottom surface 2D of the housing 2 to reinforce the lighting device 1 (housing 2). It is conceivable that the reinforcing metal fitting K is mounted in contact with the side surface 2A or the side surface 2B instead of the bottom surface 2D of the housing 2. If the distance to H2 is too short, the reinforcing metal fitting K will interfere with the quality inspection using the illumination device 1, which is not preferable.

It is also conceivable to provide the maintenance opening H1 on the bottom surface 2D instead of the side surface 2A, but in this case, when removing the lid member 4, it becomes necessary to remove the reinforcing metal fitting K, which is troublesome. In this respect, in the present embodiment, the maintenance opening H1 is provided in the side surface 2A, and the cover member 4 is configured to be removable in the direction perpendicular to the side surface 2A (the direction indicated by the arrow A in FIG. 2B). Even if the lighting device 1 is attached to the reinforcing metal fitting K as shown in FIG.

In addition, since the present embodiment uses the reflecting mirror 3 as an optical component and does not use a resin-made optical component (diffusing lens, rod lens, etc.) that is likely to deteriorate over time, it is not necessary to replace the optical component.

Although the illumination device according to the embodiments of the present invention has been described with reference to the accompanying drawings, the present invention is not limited to such embodiments, and various modifications and modifications are possible without departing from the scope of the present invention. is.

For example, in the above-described embodiment, the reflecting mirror 3 having the reflecting surface 30 with a concave cross section is used without using a lens. and the light irradiation port H2, an optical component such as a condensing lens may be arranged. In this case also, access to the light source unit 5 is possible without removing the optical parts such as the condenser lens.

Reference Signs List 1 illumination device 2 housings 2A, 2B side surface 2C surface 3 reflector 4 lid member 5 light source unit (LED unit)
7 Transparent sealing plate H1 Maintenance opening H2 Light irradiation port

Claims (2)

A linear lighting device that linearly illuminates an irradiation surface,
a housing extending along the longitudinal direction of the linear illumination device ;
a reflector housed in the housing;
a lid member extending along the longitudinal direction and detachably attached to the housing;
a light source unit attached to the inner surface of the lid member;
The housing includes a side wall provided with a light irradiation port and another side wall provided with a maintenance opening and orthogonal to the side wall,
the other side wall of the housing has a side edge defining the maintenance opening, the side edge being provided with a step;
the lid member is positioned in contact with the stepped portion and is mounted on the housing to cover the maintenance opening;
The light source unit includes a substrate attached to the inner surface of the lid member, and a plurality of light sources mounted on the substrate and arranged along the longitudinal direction ,
the lid is removable from the housing without removing optical components including the reflector;
A linear illumination device, wherein light emitted from the light source is reflected by the reflecting mirror in a direction toward the light irradiation port, and linearly illuminates the irradiation surface through the light irradiation port. Another stepped portion that fits with the stepped portion is provided at an end of the lid member, and the other stepped portion of the lid member is positioned by contacting the stepped portion of the side wall,
2. The linear illumination device according to claim 1, wherein the outer surface of the lid member is flush with the other side wall.

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