JP2021136151A - Lighting device - Google Patents

Abstract

To provide a thin lighting device.SOLUTION: According to a lighting device 100, a projecting part 140 having a tip end part 140A functioning as a rotational support axis of a lighting fixture 110 is formed in a mountain shape downwardly projecting from a cover 130, and its tip end part 141 is formed in a downwardly protruding spherical segment shape. The projecting part 140 abuts to a downwardly recessed spherical crown shape of a second recessed part 110BC at the center of a large-diameter surface 110B of the lighting fixture 110, and functions as a support axis of the lighting fixture 110. As a result of such a structure above, in the lighting device 100, the thickness of the projecting part 140 for rotating the lighting fixture 110 is partly overlapped on the thickness of the lighting fixture 110 where the second recessed part 110BC is formed in a vertical direction, namely in a direction of the thickness of the lighting device 100.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a lighting device mounted on a ceiling or the like.

Patent Document 1 discloses a lighting assembly that rotatably supports a substantially spherical lamp. In this lighting assembly, a convex pivot provided on the spring portion in the center of the lamp cover hits the inner surface of the concave pivot point of the housing covering the lamp. Then, the lamp rotates with the pivot that hits the inner surface of the pivot point as a fulcrum.

Special Table 2009-541941

In the lighting assembly described in Patent Document 1, the spring portion of the lamp is provided with a pivot that is convex in the housing direction. Therefore, this lighting assembly is thickened by the amount that the pivot is convex toward the housing.

It is an object of the present disclosure to provide a thin lighting device.

In the lighting device according to the present disclosure, the upper bottom is a large-diameter surface, the lower bottom is a small-diameter surface having a smaller diameter than the large-diameter surface, and the side surface is a spherical band surface tapered in the direction from the large-diameter surface to the small-diameter surface. A bezel having a substantially spherical segment shape and having a lamp that emits illumination light from the small diameter surface and a support surface that rotatably supports the lamp by supporting the bulb surface of the lamp from the side of the small diameter surface. And a cover attached to the bezel and covering the luminaire from the side of the large-diameter surface, the large-diameter surface of the luminaire has a recess in the center thereof, and the cover has a recess from the cover. A mountain-shaped projecting portion is provided that supports the lamp by projecting toward the large-diameter surface and the tip portion hitting the inner surface of the recess, and the tip portion of the projecting portion is convex toward the small-diameter surface side. The inner surface of the recess is formed in a convex shape, and the inner surface of the recess is a concave surface recessed toward the small diameter surface. Is rotatably supported around the center of the sphere on the sphere.

According to the lighting device according to the present disclosure, the tip of the protrusion that functions as a support shaft for the rotation of the lamp is in contact with the recess provided on the large diameter surface of the lamp, and the thickness of the tip of the protrusion and the thickness of the lamp The thickness can be overlapped with the thickness in the thickness direction of the lighting device. Therefore, the lighting device according to the present disclosure becomes thinner by the amount of this overlap.

It is sectional drawing of the lighting apparatus which concerns on one Embodiment of this disclosure. It is an exploded perspective view of the lighting device of FIG. It is an exploded perspective view of the lighting device of FIG. It is sectional drawing of the lighting apparatus when the lamp of FIG. 1 is rotated.

The lighting device 100 according to the embodiment of the present disclosure will be described with reference to the drawings. The illumination direction side of the illumination device 100 is "lower", and the opposite side is "upper". Further, the directions of the two axes orthogonal to the vertical direction are defined as front-back and left-right, respectively.

(Configuration of Lighting Device 100)
As shown in FIGS. 1 to 3, the lighting device 100 includes a lamp 110 that emits illumination light P on the lower side and a bezel 120 that rotatably supports the lamp 110. Further, the lamp 110 includes a cover 130 attached to the bezel 120 to cover the lamp 110, and a protrusion 140 projecting from the cover 130 to support the lamp 110. Such a lighting device 100 is attached to the ceiling 10 above the passenger seats of an airplane and is used as a reading light. The state in which the lamp 110 is in the orientation shown in FIG. 1 is also referred to as an initial state.

As a whole, the lamp 110 has a substantially spherical segment shape having a spherical band surface 110A at the lower part of the side surface. The lamp 110 includes a large-diameter surface 110B forming an upper bottom having a substantially spherical segment shape, and a small-diameter surface 110C forming a lower bottom having a substantially spherical shape. The large-diameter surface 110B and the small-diameter surface 110C are both circular, and the small-diameter surface 110C has a smaller diameter. The spherical segment surface 110A has a shape that tapers from the large-diameter surface 110B toward the small-diameter surface 110C, that is, downward. The lamp 110 emits illumination light P from the small diameter surface 110C.

As shown in FIG. 1, the lamp 110 includes a light source 111 that emits illumination light P and a circuit board 112 on which the light source 111 is mounted. The lamp 110 further includes a lens 113 that collects the illumination light P from the light source 111, and a housing 114 that houses the light source 111 and the circuit board 112 inside. The light source 111 includes a light emitting element such as an LED (Light Emitting Diode). The circuit board 112 includes a drive circuit for driving the light source 111.

As shown in FIGS. 1 to 3, the housing 114 forms the outer shape of the lamp 110. The housing 114 includes a cup-shaped lower member 114A and a disk-shaped upper member 114B that covers the lower member 114A from above.

The bottom of the lower member 114A is provided with a circular opening 114AA that exposes the lens 113 downward. As shown in FIG. 1, the lens 113 is attached to the bottom of the lower member 114A so as to cover the opening 114AA from above. The lens 113 is exposed downward from the lower surface of the lower member 114A. The lower surface of the lower member 114A and the lower surface of the lens 113 form a small diameter surface 110C of the lamp 110.

As shown in FIGS. 1 to 3, the side peripheral surface of the lower member 114A is formed as a spherical band surface 110A of the lamp 110. The side peripheral surface of the lower member 114A, that is, the spherical band surface 110A of the lamp 110 has a shape in which the lower portion and the upper portion are cut off from the lower hemisphere of the sphere centered on the point C in FIG. Therefore, the point C is the center of the sphere of the sphere 110A.

The upper member 114B has a disk shape and is attached to the lower member 114A by a screw N shown in FIG. As shown in FIG. 1, a circuit board 112 on which the light source 111 is mounted is attached to the lower surface of the upper member 114B.

As shown in FIGS. 1 and 2, the upper surface of the upper member 114B is formed as a large-diameter surface 110B of the lamp 110. The upper surface of the upper member 114B, that is, the large-diameter surface 110B of the lamp 110, includes a peripheral edge portion 110BA, a first recess 110BB, and a second recess 110BC from the outside in the radial direction. The peripheral edge portion 110BA has an annular shape and is flat. The first recess 110BB is adjacent to the peripheral edge 110BA, and has an annular shape and a flat bottom surface. The second recess 110BC is provided in the center of the first recess 110BB. The center of the first recess 110BB is also the center of the large diameter surface 110B. The inner surface of the second recess 110BC is a concave surface that is recessed downward, that is, toward the small diameter surface 110C. The concave surface is a spherical cap surface, which is a spherical cap-shaped surface here. As shown in FIG. 1, the protrusion 140 hits the inner surface of the second recess 110BC.

As shown in FIGS. 1 to 3, the lamp 110 also includes two columnar protrusions 115 protruding from the upper member 114B of the housing 114. The two protrusions 115 project from the upper member 114B in opposite directions with the point C interposed therebetween. The two protrusions 115 extend in the left-right direction, that is, in the direction orthogonal to the optical axis S of the illumination light P in the initial state of FIG. The extension line upward of the optical axis S passes through the point C. The details will be described later, but the two protrusions 115 function as detents for the lamp 110.

The bezel 120 rotatably supports the lamp 110 and constitutes an outer frame that can be attached to the ceiling 10. The bezel 120 includes a flat plate portion 121 and a cylindrical cylindrical portion 122 extending upward from the flat plate portion 121. The flat plate portion 121 and the cylindrical portion 122 are integrally molded. The bezel 120 is arranged on the flat plate portion 121, and also includes a ring-shaped support member 123 that supports the lamp 110. As shown in FIGS. 2 and 3, the bezel 120 also includes a claw-shaped hook portion 124 that is hooked on the ceiling 10 when the bezel 120 is attached to the ceiling 10.

As shown in FIGS. 1 to 3, the flat plate portion 121 is provided with a circular opening 121A in the center. From the opening 121A, the small diameter surface 110C of the lamp 110 is exposed downward. In the initial state of FIG. 1, the lower surface of the lower member 114A of the small diameter surface 110C of the lamp 110 is flush with the lower surface of the flat plate portion 121. As shown in FIGS. 2 and 3, a hook portion 124 is arranged on the upper surface of the flat plate portion 121. The flat plate portion 121 is attached to the ceiling 10 by means (not shown), for example, a screw or the like, in a state where the hook portion 124 is hooked on a part of the ceiling 10. By attaching to the ceiling 10, the bezel 120, that is, the lighting device 100 is attached to the ceiling 10.

As shown in FIG. 1, the cylindrical portion 122 accommodates the lamp 110. The central axis of the cylindrical portion 122 extends in the vertical direction and passes through the point C. In the initial state of FIG. 1, the central axis of the cylindrical portion 122 coincides with the optical axis S of the illumination light P. As shown in FIGS. 2 and 3, the cylindrical portion 122 includes four through holes 122A penetrating in the radial direction. The through hole 122A is used for attaching the cover 130. As shown in FIGS. 1 and 2, the cylindrical portion 122 also includes a recess 122B extending in the vertical direction in which the two protrusions 115 of the lamp 110 enter, on the inner surface thereof. Although the details will be described later, the protrusion 115 functions as a detent for the lamp 110 by entering the recess 122B.

The support member 123 is arranged at a corner portion where the flat plate portion 121 and the cylindrical portion 122 are connected and inside the cylindrical portion 122. The support member 123 has a spherical band shape that matches the spherical segment surface 110A of the lamp 110 as its inner peripheral surface, and has a support surface 123A that comes into surface contact with the spherical segment surface 110A of the lamp 110 and rotatably supports the lamp 110. Be prepared. The support surface 123A contacts and supports the spherical band surface 110A of the lamp 110 from the lower side, that is, the small diameter surface 110C side. The support surface 123A rotatably supports the lamp 110 around a point C, which is the center of the sphere of the sphere band surface 110A. On the other hand, since the protrusion 115 of the lamp 110 is inserted into the recess 122B of the cylindrical portion 122, rotation of the lamp 110 with the axis extending in the vertical direction as the rotation axis is prohibited. Therefore, the lamp 110 can be rotated in two axes in the front-rear direction and the left-right direction orthogonal to the axis extending in the vertical direction.

The cover 130 includes a disk-shaped cover main body 131 and four legs 132 extending downward from the peripheral edge of the cover main body 131, that is, toward the small diameter surface 110C side of the lamp 110.

The cover body 131 includes a cup portion 131A having a cup shape that is convex downward, that is, toward the lamp 110 side, in the center thereof. A protruding portion 140 is fixed to the bottom of the cup portion 131A.

As shown in FIGS. 2 and 3, each of the four legs 132 is provided with a claw 132A extending radially inward of the cover body 131 at its tip. The claw 132A is hooked on the inner wall of the through hole 122A of the cylindrical portion 122 of the bezel 120. As a result, the cover 130 is attached to the bezel 120 with the lamp 110 covered from above, that is, from the large diameter surface 110B side.

As shown in FIGS. 1 to 3, the protruding portion 140 is provided at the center of the cover 130, specifically, at the center of the cup portion 131A of the cover main body 131 of the cover 130. The protrusion 140 is made of synthetic resin and is integrally formed with the metal cover 130 by insert molding. The protruding portion 140 has a mountain shape protruding from the cover 130 toward the lamp 110 side. The tip portion 141 of the protruding portion 140 is formed in a convex shape that is convex downward, that is, toward the small diameter surface 110C. The convex shape here is a sphere-missing shape. The sphere center of the tip portion 141 formed in this sphere-missing shape is a point C. Therefore, the center of the sphere of the tip portion 141 and the center of the sphere of the sphere band surface 110A of the lamp 110 coincide with each other. The tip portion 141 is formed here in the shape of a hemisphere of the missing spheres.

The tip portion 141 of the protruding portion 140 hits the inner surface of the second recess 110BC at the center of the large diameter surface 110B of the lamp 110. Here, the diameter of the tip portion 141 of the ball-missing shape is formed to be smaller than the diameter of the inner surface of the ball crown shape of the second recess 110BC. Further, the sphere center on the inner surface of the second recess 110BC is located above the sphere center of the tip portion 141, that is, on the cover 130 side.

The tip portion 141 of the protruding portion 140 supports the lamp fixture 110 by hitting the inner surface of the second recess 110BC of the lamp fixture 110. The lamp 110 is supported by the tip portion 141 and the support surface 123A of the support member 123. The protrusion 140 is formed so as to press the lamp 110 against the support surface 123A of the support member 123 when the cover 130 is attached to the bezel 120.

(Operation of lighting device 100)
When the user of the lighting device 100 wants to adjust the lighting direction of the lighting device 110, he / she presses the small diameter surface 110C of the lighting device 110, particularly the lower surface of the lower member 114A, with a finger. As a result, as shown in FIG. 4, the lamp 110 rotates. The lamp 110 rotates around a point C, which is the center of the sphere on the sphere 110A. At this time, the lamp 110 rotates with the tip portion 141 of the protruding portion 140 in contact with the second concave portion 110BC of the large-diameter surface 110B as a support shaft for rotation. Since the diameters of the second recess 110BC and the tip 141 are different from each other, the contact portion between the tip 141 of the protrusion 140 and the second recess 110BC moves as the lamp 110 rotates. For this reason, the projecting portion 140 and the upper member 114B are preferably formed of engineering plastic such as polyacetal (POM) having excellent wear resistance. The contact point between the tip portion 141 of the protrusion 140 and the second recess 110BC is arranged below the point C, which is the center of rotation of the lamp 110, that is, on the small diameter surface 110C side. Since the lamp 110 is pressed against the support member 123 by the protrusion 140, the orientation of the lamp 110 is maintained by the frictional force between the support member 123 and the lamp 110 even if the user releases the finger from the lamp 110. NS. When the lamp 110 is further rotated from the state shown in FIG. 4, the lamp 110 hits the cover 130 and further rotation is prevented.

(Effect of lighting device 100)
As described above, in the lighting device 100, the protruding portion 140 having the tip portion 141 functioning as a support shaft for the rotation of the lamp 110 is formed in a chevron shape protruding downward from the cover 130, and the tip portion 141 is formed downward. It is formed in a convex convex shape. Then, the protruding portion 140 abuts on the downwardly recessed concave surface which is the inner surface of the central second concave portion 110BC of the large diameter surface 110B of the lamp 110, and functions as a support shaft of the lamp 110. With such a configuration, in the lighting device 100, the thickness of the protruding portion 140 for rotating the lamp 110 is in the vertical direction, that is, in the thickness direction of the lighting device 100, in the vertical direction and the thickness of the lamp 110 in which the second recess 110BC is formed. Some overlap. As a result, the lighting device 100 is made thinner. The overlap cannot be formed by a conventional structure in which the second concave portion 110BC of the lamp 110 is changed to an upwardly convex convex portion and the cover 130 is provided with a concave portion that receives the convex portion. Therefore, the lighting device 100 is made thinner than the conventional structure described above.

In the lighting device 100, since the protruding portion 140 is integrally molded with the cover 130, the cover 130 and the bezel 120 to which the cover 130 is fixed are immovable. Then, the protrusion 140 presses the lamp 110 against the support surface 123A of the support member 123. Therefore, it is not necessary to press the lamp 110 by the protrusion 140 with a spring or the like as in Patent Document 1. Therefore, it is not necessary to make the lighting device 100 thicker in order to increase the stroke of the spring, and the lighting device 100 can be made thinner.

In the lighting device 100, the contact position where the tip portion 141 of the protruding portion 140 hits the inner surface of the second recess 110BC is below the point C which is the center of the sphere of the sphere band surface 110A, that is, on the side of the small diameter surface 110C. As a result, the lighting device 100 can be made thinner than when the contact position is above the point C.

In the lighting device 100, since the protrusion 140 is made of synthetic resin, the lamp 110 can be rotated more repeatedly than when the protrusion 140 is made of metal. This is because synthetic resin is more advantageous than metal in terms of wear resistance and the like. The protrusion 140 is particularly preferably a POM or the like.

In the lighting device 100, the tip portion 141 of the protruding portion 140 has a ball-missing shape. Therefore, the lamp 110 can rotate smoothly.

In the lighting device 100, the inner surface of the second recess 110BC is a spherical cap surface having a diameter larger than that of the tip portion 141 of the protruding portion 140. Therefore, the lamp 110 can rotate smoothly.

In the lighting device 100, the ball center of the tip portion 141 of the protrusion 140 coincides with the ball center of the ball band surface 110A of the lamp 110. Therefore, the lamp 110 can rotate smoothly.

(Modification example)
The shape and the like of each member constituting the lighting device 100 can be changed as appropriate. For example, the support member 123 of the bezel 120 may be integrally formed with the flat plate portion 121 and the cylindrical portion 122. Further, the cover 130 may be provided with a cylindrical portion corresponding to the cylindrical portion 122, and the bezel 120 side may not be provided with the cylindrical portion 122. The cover 130 may be fixed to the bezel 120 directly or indirectly via other members. The cover 130 and the protrusion 140 may be integrally formed of the same material such as synthetic resin. The lighting device 100 may be mounted on a wall or the like. Even in this case, the direction in which the lighting device 100 or the like illuminates is set downward. Therefore, the top-bottom direction in which the wall extends is defined as the above-mentioned front-back direction or left-right direction, and the horizontal direction is defined as the vertical direction. The tip portion 141 of the protruding portion 140 may have a convex shape, and is not limited to the above-mentioned ball-missing shape. The tip portion 141 is preferably curved in order to facilitate the rotation of the lamp 110. The inner surface of the second concave portion 110BC may be a concave surface and is not limited to the spherical cap surface. The inner surface of the second recess 110BC is preferably a curved surface in order to facilitate the rotation of the lamp 110.

(Lighting device disclosed in the present disclosure)
The illuminating device of the present disclosure is not limited to the illuminating device 100. The configurations of the illuminating device of the present disclosure, that is, the illuminating device according to the above-described embodiment and modification are listed below.

The lighting device (for example, the lighting device 100) of the present disclosure includes a lamp (for example, a lamp 110), a bezel (for example, a bezel 120), a cover (for example, a cover 130), and a protrusion (for example, a protrusion 140). Be prepared. The lamp has an upper bottom having a large-diameter surface (for example, a large-diameter surface 110B), a lower base having a small-diameter surface having a smaller diameter than the large-diameter surface (for example, a small-diameter surface 110C), and a side surface from the large-diameter surface to the above-mentioned. It has a substantially spherical segment shape having a spherical band surface (for example, a spherical band surface 110A) that tapers in the direction toward the small diameter surface. The lamp emits illumination light from the small diameter surface. The bezel has a support surface (for example, the support surface 123A of the support member 123) that rotatably supports the lamp by supporting the spherical surface of the lamp from the side of the small diameter surface. The cover is attached to the bezel and covers the lamp from the side of the large diameter surface. The large-diameter surface of the lamp has a recess (for example, a second recess 110BC) in the center thereof. The protrusion is provided on the cover. The protruding portion is formed in a chevron shape protruding from the cover toward the large diameter surface. The protruding portion supports the lamp by having the tip portion (for example, the tip portion 141) hit the inner surface of the recess. The tip portion of the protruding portion is formed in a convex shape that is convex toward the small diameter surface side. The inner surface of the recess is a concave surface recessed toward the small diameter surface side. The protrusion rotatably supports the lamp with the tip of the protrusion, which is the inner surface of the recess, as a support axis around the center of the sphere of the sphere. According to such a configuration, the lighting device is thinned.

The protrusion may be immovably provided with respect to the cover. Further, the protruding portion may press the inner surface of the recess of the lamp with the tip to press the lamp against the support surface. With such a configuration, the lighting device becomes thin.

The position where the tip portion touches the inner surface of the recess may be located closer to the small diameter surface than the center of the sphere. As a result, the lighting device becomes thin.

The protruding portion may be made of synthetic resin. As a result, the lamp can be rotated repeatedly.

The convex shape may be a spherical shape. As a result, the rotation of the lamp becomes smooth.

The concave surface may be a spherical cap surface having a diameter larger than that of the tip portion. As a result, the rotation of the lamp becomes smooth.

The sphere center of the tip portion may coincide with the sphere center of the sphere band surface. As a result, the rotation of the lamp becomes smooth.

10 Ceiling, 100 Lighting device, 110 Lighting equipment, 110A spherical band surface, 110B large diameter surface, 110BA peripheral part, 110BB first recess, 110BC second recess, 110C small diameter surface, 113 lens, 114 housing 114A lower member, 114B Upper member, 120 bezel, 122 cylindrical part 122A through hole, 123 support member, 123A support surface, 130 cover, 131 cover body, 131A cup part, 132 legs, 140 protrusion, 141 tip, C point (sphere center), P illumination light, S optical axis.

Claims (7)

The upper base is a large-diameter surface, the lower base is a small-diameter surface having a smaller diameter than the large-diameter surface, and the side surface has a substantially spherical segment shape having a spherical band surface tapered in the direction from the large-diameter surface to the small-diameter surface. Lighting equipment that emits illumination light from a small diameter surface,
A bezel having a support surface that rotatably supports the lamp by supporting the spherical surface of the lamp from the side of the small diameter surface.
A cover attached to the bezel and covering the lamp from the side of the large diameter surface is provided.
The large diameter surface of the lamp has a recess in the center thereof.
The cover is provided with a mountain-shaped protrusion that supports the lamp by projecting from the cover toward the large-diameter surface and the tip portion hitting the inner surface of the recess.
The tip portion of the protruding portion is formed in a convex shape that is convex toward the small diameter surface side.
The inner surface of the recess is a concave surface recessed toward the small diameter surface side.
The protrusion rotatably supports the lamp with the tip of the protrusion corresponding to the inner surface of the recess as a support axis around the center of the sphere of the sphere.
Lighting device. The protrusion
Immovably provided with respect to the cover
The tip portion presses the inner surface of the recess of the lamp to press the lamp against the support surface.
The lighting device according to claim 1. The position where the tip portion touches the inner surface of the recess is located on the side of the small diameter surface with respect to the center of the sphere.
The lighting device according to claim 1 or 2. The lighting device according to any one of claims 1 to 3.
The protruding portion is made of synthetic resin.
Lighting device. The lighting device according to any one of claims 1 to 4.
The convex shape is a spherical shape.
Lighting device. The lighting device according to claim 5.
The concave surface is a spherical cap surface having a diameter larger than that of the tip portion.
Lighting device. The lighting device according to claim 5 or 6.
The sphere center of the tip portion coincides with the sphere center of the sphere band surface.
Lighting device.

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