JP4778926B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device, and more particularly to a lighting device including a deformed glove.

  Conventionally, a female screw is formed at a rising portion of a lighting device main body attached to a mounting surface such as a wall surface or a ceiling, and a male screw is formed on an inner side wall of an opening peripheral edge of a glove attached to the lighting device main body. An illuminating device is known in which an outer wall is formed on the outer side and a groove is formed between the inner wall and the outer wall (see, for example, Patent Document 1). In this illuminating device, when the male screw of the glove is screwed into the female screw of the illuminating device main body, the rising portion of the illuminating device main body is attached so as to enter the inside of the concave groove portion of the glove. As a result, the opening side of the globe approaches the mounting surface such as the wall surface or the ceiling, making it difficult to see the illuminating device main body from the outside and improving the appearance of the illuminating device.

About the globe of the said conventional illuminating device, the thing of not only cylindrical shape but an irregular shape, for example, polygonal cylinder shape, polygonal frustum shape is known (for example, refer to patent documents 1 and Drawing 3). In addition, the conventional glove is mainly a relatively large one using a glass material, but in recent years, the demand for a small glove using a synthetic resin material is increasing.
Japanese Utility Model Publication No. 61-9705

  However, the lighting device provided with the above-described conventional irregular globe has a problem in that when it is turned on, a dark shadow portion is formed on the opening side of the side wall of the globe and the appearance of the lighting device is greatly impaired. For example, as shown in FIG. 11, when the lighting device 111 including the square pyramid-shaped globe 131 is turned on as the conventional lighting device, the opening of the globe side wall 132 (the portion to which the lighting device main body 121 is attached, FIG. 9)) There was a dark shadow on the side. In addition, this problem is likely to occur in small gloves. Therefore, the inventor of the present application has found that there are the following causes as a result of intensive studies to solve this problem.

  FIG. 8 is a plan view of the square frustum-shaped globe 131 viewed from the opening 133 side. Since an external thread 138 is formed on the inner wall 134 at the peripheral edge of the opening, the shape of the inner wall 134 is inevitably cylindrical. A square frustum-shaped globe side wall 132 is formed on the outside. While the shape of the inner wall 134 is cylindrical, the shape of the globe side wall 132 is a square frustum, so the distance from the circumferential surface of the inner wall 134 to the globe side wall 132 is not constant, There are separate areas. For example, in the vicinity of line 9-9 in FIG. 8, the distance from the peripheral surface of inner wall 134 to globe side wall 132 is relatively short and close, and in the vicinity of line 10-10 in FIG. The distance from the circumferential surface to the globe side wall 132 is a relatively long and spaced area.

  Further, as shown in FIG. 8, in the above-described conventional deformed globe 131, the outer wall 135 formed between the inner wall 134 and the globe side wall 132 is also cylindrical, and the inner wall 134 and the outer wall 135 Since the recessed groove portion 136 to be formed has a constant width, the outer wall 135 and the globe side wall 132 are also close to each other in the region where the inner wall 134 and the globe side wall 132 are close to each other. In the region where is separated from each other, the outer side wall 135 and the globe side wall 132 are also separated from each other.

  9 and 10 are sectional views showing a state in which the square frustum-shaped globe 131 of FIG. 8 is attached to the luminaire main body. The cross section of the globe 131 of FIGS. 9 and 10 shows a state cut along line 9-9 in FIG. 8 in FIG. 9, and a state cut along line 10-10 in FIG. 9 and 10, the irradiation light from the approximate center 26 of the light source 25 (for example, the filament position in the incandescent lamp) is applied to substantially the entire circumference of the globe 131, but the irradiation light is applied to the outer wall of the globe 131. 135 and the recessed groove part 136, and the opening 133 side of the imaginary line L cannot be directly irradiated. As shown in FIG. 9, in the region where the outer wall 135 and the globe side wall 132 are close to each other, a portion where the irradiation light is not directly irradiated is generated on the globe side wall 132, and a part of the globe side wall 132 on the opening 133 side is formed. A dark shadow part will be generated. On the other hand, as shown in FIG. 10, in a region where the outer wall 135 and the globe side wall 132 are separated from each other, a portion that is not directly irradiated with the irradiation light does not occur on the globe side wall 132, and the irradiation light passes through the globe side wall 132 through the opening 133. It can irradiate directly to the side, and no shadow portion is generated on the globe side wall 132.

  Due to the above causes, as shown in FIG. 11, a dark shadow portion is generated on the opening side of the globe side wall 132 (the portion to which the lighting device main body 121 is attached, see FIG. 9). The problem that darker shadows are more likely to occur is that the smaller the globe 131 is, the more the outer wall 135 and the globe side wall 132 are closer to each other, and the irradiation light from the light source 25 is emitted from the outer wall 135 and the globe 131. This was caused by being blocked by the concave groove 136.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a lighting device that makes it difficult to form a dark shadow portion on the opening side of the globe side wall and has a good appearance.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, according to the first aspect of the present invention, the illuminating device main body in which the female thread is formed at the rising portion, the concave groove is formed between the inner wall and the outer wall of the peripheral edge of the opening, and the male screw is formed on the inner wall. A glove formed by attaching the glove to the illuminating device main body by screwing the female screw and the male screw,
The glove has a glove side wall whose distance from the peripheral surface of the inner side wall varies depending on the position, and in a region where the inner side wall and the glove side wall approach each other, a part of the outer wall extends along the glove side wall. Due to the shape, the lighting device is characterized in that a part of the outer wall included in the region is made to approach the inner wall.

In invention of Claim 2, in the illuminating device of Claim 1,
The glove has a glove sidewall having a planar shape portion, and a part of the outer wall facing the planar shape portion has a planar shape .

In invention of Claim 3, in the illuminating device of any one of Claim 1 or 2,
The globe has a lighting device characterized in that the width of the bottom of the groove is narrower than the width of the opening .

In invention of Claim 4, in the illuminating device of any one of Claim 1 to 3,
The globe is a lighting device characterized in that a cross section of a shoulder portion of the concave groove portion is rounded from the outer wall to the bottom of the concave groove portion .

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, since the globe has a shape in which a part of the outer wall included in the region is brought closer to the inner wall in the region where the inner wall and the globe sidewall approach each other, Since the gap from the glove side wall is separated, it becomes easy to directly irradiate the irradiation light from the light source to the opening side of the glove side wall, and it becomes difficult to produce a dark shadow part on the opening side of the glove side wall. The appearance appearance of can be improved. In addition, even with a small glove, it becomes easy to secure the space between the outer wall and the glove side wall, and it becomes difficult to produce a shadow part, and there is no need to newly attach a member for reducing the shadow part to the glove. The glove can be formed simply.

According to the invention described in claim 1 , since the globe has a part of the outer wall formed in a shape along the globe side wall, in the region where the inner wall and the globe side wall are close to each other, It becomes easy to secure a certain interval or more, and it becomes easy to directly irradiate the irradiation light from the light source to the opening side of the globe side wall, and it becomes difficult to produce a dark shadow portion on the opening side of the globe side wall.

According to the second aspect of the present invention, the globe has a globe side wall having a planar shape portion, and a part of the outer wall facing the plane shape portion has a planar shape. In a planar shape part where the interval is likely to be narrowed, it becomes easy to ensure a certain distance between the outer wall and the globe side wall, and it becomes easier to irradiate light from the light source directly to the opening side of the globe side wall. It becomes difficult to produce a dark shadow part on the opening side of the.

According to the third aspect of the present invention, since the width of the bottom of the groove is narrower than the width of the opening, the depth and width of the groove are secured while the outer wall and the glove side wall are located on the bottom side of the groove. It becomes easy to secure a certain interval or more, and it becomes easy to directly irradiate the irradiation light from the light source to the opening side of the globe side wall, and it becomes difficult to produce a dark shadow portion on the opening side of the globe side wall.

According to the invention described in claim 4 , since the cross section of the shoulder portion of the concave groove portion is formed round from the outer wall to the bottom of the concave groove portion, the irradiation light from the light source is blocked while ensuring the depth and width of the concave groove portion. The shoulders of the easy-to-groove grooves can be formed low, making it easy to irradiate light from the light source directly to the opening side of the globe side wall, making it difficult for dark shadows to occur on the opening side of the globe side wall.

  Next, embodiments of the invention will be described with reference to the drawings.

  A lighting device 11 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

  As shown in FIGS. 1 to 3, the lighting device 11 according to the present embodiment is a lighting device 11 including a square frustum-shaped globe 31 as a deformed globe 31. Here, the irregularly shaped globe 31 has a globe side wall 32 in which the distance from the peripheral surface of the inner side wall 34 varies depending on the position, and the shape is not limited to the square frustum shape of the present embodiment, but other than the cylindrical shape. A polygonal frustum shape having a pentagon or more and a polygonal cylinder shape are also included in the deformed globe 31. Further, even if the center axis of the globe 31 and the center of the opening 33 do not coincide with each other even in a cylindrical shape or a truncated cone shape, the distance from the peripheral surface of the inner wall 34 varies depending on the position. Applicable and included in the deformed globe 31.

  As shown in FIG. 2, the lighting device main body 21 attached to the attachment surface has a female screw 23 formed at the rising portion 22, a socket portion 24 is erected at the center portion, and the socket portion 24 has a light source 25 as a light source 25. Incandescent lamps are installed. The illuminating device main body 21 is attached to the attachment surface by a fixing means (not shown) such as a tapping screw.

  As shown in FIG. 2, a glove 31 attached to the lighting device main body 21 has a male screw 38 formed on a cylindrical inner wall 34 at the peripheral edge of the opening, and a cylindrical outer wall 35 outside the inner wall 34. A concave groove 36 is formed between the inner wall 34 and the outer wall 35. When the male screw 38 of the globe 31 is screwed into the female screw 23 of the illuminating device body 21, the rising portion 22 of the illuminating device body 21 enters the inside of the recessed groove portion 36 of the globe 31, and the glove 31 is attached to the illuminating device body 21. It is attached. The lighting device 11 according to the present embodiment is a moisture-proof type in which the packing 39 is interposed between the bottom portion 37 of the concave groove portion 36 and the rising portion 22 to prevent moisture inside the globe 31. It may be of a specification that is not performed.

  FIG. 1 is a plan view of a square frustum-shaped globe viewed from the opening 33 side. Since an external thread 38 is formed on the inner wall 34 at the peripheral edge of the opening, the inner wall 34 is necessarily cylindrical. A square frustum-shaped globe side wall 32 is formed on the outside. While the shape of the inner wall 34 is cylindrical, the shape of the globe side wall 32 is a square frustum, so the distance from the circumferential surface of the inner wall 34 to the globe side wall 32 is not constant and varies depending on the position. Yes. For example, in the vicinity of line 2-2 in FIG. 1, the distance from the circumferential surface of the inner wall 34 to the globe side wall 32 is relatively short and close, and in the vicinity of line 3-3 in FIG. The distance from the circumferential surface to the globe side wall 32 is a relatively long and separated area.

  As shown in FIG. 1, the outer wall 35 is a straight line in which the four directions included in the region follow the shape of the globe side wall 32 in the region where the inner wall 34 and the four surfaces of the globe side wall 32 are close to each other. It is formed in a shape and close to the inner wall 34. Further, this portion is formed in a planar shape as shown in FIG. As shown in FIG. 1, in the area | region where the inner side wall 34 and the globe side wall 32 were separated, the outer side wall 35 is made into the curved shape, and the planar part formed in four directions is made to continue smoothly.

  The extent to which the outer side wall 35 is brought closer to the inner side wall 34 is determined by factors such as the depth and width required for the groove 36 and the position of the light source 25, but as shown in FIG. The position of the outer wall 35 is preferably determined so that the imaginary line L indicating the range directly irradiated by the irradiation light reaches the opening 33 side of the globe side wall 32. In this case, a shadow portion generated on the opening 33 side of the globe side wall 32 can be eliminated. Even if the portion where the irradiation light cannot be directly irradiated remains on the globe side wall 32, if the portion is small, the light irradiated nearby diffuses, resulting in the darkness generated on the globe side wall 32. In some cases, shadows can be almost eliminated.

  Next, a state where the lighting device 11 according to the present embodiment is turned on will be described. As shown in FIGS. 2 and 3, the irradiation light from the approximate center 26 of the light source 25 (for example, the filament position in the incandescent lamp) is applied to substantially the entire circumference of the globe 31, and the irradiation light is emitted from the outer wall of the globe 31. It is blocked by the groove 35 and the groove 36 and cannot directly irradiate the opening 33 side of the virtual line L. However, in the vicinity of the line 2-2 in FIG. 1, that is, in the region where the inner wall 34 and the globe side wall 32 are close to each other, the irradiation light from the light source 25 is emitted from the light source 25 by bringing the outer wall 35 close to the inner wall 34. It becomes easy to irradiate directly to 32 opening 33 side, and the part which cannot be irradiated directly does not arise. Further, as shown in FIG. 3, in a region where the outer wall 35 and the globe side wall 32 are separated from each other, a portion that is not directly irradiated with the irradiation light does not naturally occur on the globe side wall 32, and the irradiation light passes through the globe side wall 32. Since direct irradiation can be performed up to the opening 33 side, no shadow portion is generated on the globe side wall 32. Therefore, the dark shadow part by the side of the opening part 33 of the glove side wall 32 is eliminated, and the external appearance of the illuminating device 11 can be made favorable.

  Next, the illuminating device 11 which concerns on Example 2 of this invention is demonstrated using FIG.4 and FIG.5. The second embodiment is greatly different from the first embodiment in that the width of the bottom 37 of the recessed groove portion 36 is narrower than the width of the opening 33. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 4 is a plan view of the square frustum-shaped globe 31 as viewed from the opening 33 side. The shape of the inner wall 34 at the periphery of the opening is cylindrical. A square frustum-shaped globe side wall 32 is formed on the outside. While the shape of the inner wall 34 is cylindrical, the shape of the globe side wall 32 is a square frustum, so the distance from the circumferential surface of the inner wall 34 to the globe side wall 32 is not constant and varies depending on the position. Yes. For example, in the vicinity of the line 5-5 in FIG. 4, the distance from the peripheral surface of the inner wall 34 to the glove side wall 32 is a relatively short area. As shown in FIG. 5, the outer wall 35 is formed in a truncated cone shape in which the entire peripheral portion on the bottom 37 side of the groove 36 is made closer to the inner wall 34, and the width of the bottom 37 of the groove 36 is formed. Is formed to be narrower than the width of the opening 33.

  Next, a state where the lighting device 11 according to the present embodiment is turned on will be described. As shown in FIG. 5, the irradiation light from the approximate center 26 of the light source 25 is applied to substantially the entire circumference of the globe 31, and the irradiation light is blocked by the outer wall 35 and the concave groove portion 36 of the globe 31 and is imaginary line L. It is not possible to directly irradiate the opening 33 side. However, since the width of the bottom portion 37 of the recessed groove portion 36 is formed to be narrower than the width of the opening portion 33, in the vicinity of the line 5-5 in FIG. 4, that is, in the region where the inner side wall 34 and the globe side wall 32 approach each other. While ensuring the depth and width of the recessed groove portion 36, the gap between the outer wall 35 and the globe side wall 32 can be secured at a certain level or more on the bottom 37 side of the recessed groove portion 36. Therefore, it is easy to directly irradiate the opening 33 side of the globe side wall 32. In the present embodiment, since the outer wall 35 is positioned so that the irradiation light can directly irradiate the opening 33 side of the globe side wall 32, no shadow portion is generated on the globe side wall 32. Therefore, the dark shadow part by the side of the opening part 33 of the glove side wall 32 is eliminated, and the external appearance of the illuminating device 11 can be made favorable.

  Next, the illuminating device 11 which concerns on Example 3 of this invention is demonstrated using FIG.6 and FIG.7. The third embodiment is greatly different from the first embodiment in that the cross section of the shoulder portion of the concave groove portion 36 is rounded from the outer wall 35 of the globe 31 to the bottom portion 37 of the concave groove portion 36. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 6 is a plan view of the square frustum-shaped globe 31 as viewed from the opening 33 side. The shape of the inner wall 34 at the periphery of the opening is cylindrical. A square frustum-shaped globe side wall 32 is formed on the outside. While the shape of the inner wall 34 is cylindrical, the shape of the globe side wall 32 is a square frustum, so the distance from the circumferential surface of the inner wall 34 to the globe side wall 32 is not constant and varies depending on the position. Yes. For example, in the vicinity of the line 7-7 in FIG. 6, the distance from the peripheral surface of the inner wall 34 to the glove side wall 32 is a relatively short region. As shown in FIG. 7, the shoulder section of the recessed groove portion 36 is rounded from the outer wall 35 to the bottom portion 37 of the recessed groove portion 36.

  Next, a state where the lighting device 11 according to the present embodiment is turned on will be described. As shown in FIG. 7, the irradiation light from the approximate center 26 of the light source 25 is applied to substantially the entire circumference of the globe 31, and the irradiation light is blocked by the outer wall 35 and the recessed groove portion 36 of the globe 31 and is imaginary line L. It is not possible to directly irradiate the opening 33 side. However, since the cross section of the shoulder portion of the recessed groove portion 36 is rounded from the outer wall 35 to the bottom portion 37 of the recessed groove portion 36, the vicinity of the line 7-7 in FIG. In the approached area, the depth of the groove 36 can be secured while the cross section of the shoulder of the groove 36 that can easily block the light irradiated from the light source 25 can be formed low. It is easy to irradiate directly to the opening 33 side of 32. In the present embodiment, since the shape of the cross section of the shoulder portion of the groove 36 is determined so that the irradiation light can directly irradiate the opening 33 side of the globe side wall 32, a shadow portion is generated on the globe side wall 32. Absent. In addition, the roundness of the cross-section of the shoulder portion of the recessed groove portion 36 may be rounded with a radius of 1/4 or more of the width of the recessed groove portion 36, and more preferably formed with a radius of 1/3 or more.

  The embodiments of the present invention are not limited to the above embodiments. For example, the outer wall 35 is shaped so that the gap between the outer wall 35 and the glove side wall 32 is at least a certain value, the shape along the glove side wall 32, the planar shape, and the width of the bottom 37 of the groove 36. A shape that is narrower than the width, a shape in which the cross section of the shoulder portion of the recessed groove portion 36 is rounded, and the like can be used. For example, in a region where the outer wall 35 and the glove side wall 32 are close to each other, a part of the outer wall 35 is made to follow the shape of the glove side wall 32, and the shoulder of the concave groove portion 36 extends from the outer wall 35 to the bottom portion 37 of the concave groove portion 36. You may make it form the cross section of a part roundly. Further, the width of the bottom 37 of the groove 36 may be narrower than the width of the opening 33 and the cross section of the shoulder of the groove 36 may be rounded.

  The technical scope of the present invention described above is not limited to the above embodiment, and is not limited to the shape of the above embodiment. The technical scope of the present invention broadly covers the entire scope of technical ideas that the present invention truly intends, as will be apparent from the matters described in the present specification and drawings.

The top view which looked at the globe 31 of the illuminating device 11 which concerns on Example 1 from the opening part 33 side. Sectional drawing which cut | disconnected the illuminating device 11 in the position of the 2-2 line of FIG. Sectional drawing which cut | disconnected the illuminating device 11 in the position of the 3-3 line of FIG. The top view which looked at the globe 31 of the illuminating device 11 which concerns on Example 2 from the opening part 33 side. Sectional drawing which cut | disconnected the illuminating device 11 in the position of the 5-5 line | wire of FIG. The top view which looked at the globe 31 of the illuminating device 11 which concerns on Example 3 from the opening part 33 side. Sectional drawing which cut | disconnected the illuminating device 11 in the position of the 7-7 line | wire of FIG. The top view which looked at the globe 31 of the conventional illuminating device 111 from the opening part 33 side. Sectional drawing which cut | disconnected the illuminating device 111 in the 9-9 line | wire position of FIG. Sectional drawing which cut | disconnected the illuminating device 111 in the position of the 10-10 line | wire of FIG. The side view of the state which turned on the conventional illuminating device 111. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Illuminating device 21 Illuminating device main body 22 Standing part 23 Female screw 24 Socket part 25 Light source 26 Approximate center of light source 31 Globe 32 Globe side wall 33 Opening part 34 Inner side wall 35 Outer side wall 36 Concave groove part 37 Bottom part 38 Male screw 39 Packing L Virtual line

Claims (4)

A lighting device main body having an internal thread formed on the rising portion; and a glove having a concave groove formed between the inner wall and the outer wall of the peripheral edge of the opening and a male thread formed on the inner wall; A lighting device in which a glove is attached to the lighting device main body by screwing a female screw and the male screw,
The glove has a glove side wall whose distance from the peripheral surface of the inner side wall varies depending on the position, and in a region where the inner side wall and the glove side wall approach each other, a part of the outer wall extends along the glove side wall. by the shape, the illumination device, wherein a portion of the outer wall that is included in the area was a shape is brought close to the inner wall. The lighting device according to claim 1, wherein the globe has a globe side wall having a planar shape portion, and a part of an outer wall facing the planar shape portion has a planar shape . The lighting device according to claim 1 , wherein the glove has a width of a bottom portion of the concave groove portion narrower than a width of the opening portion . The lighting device according to any one of claims 1 to 3, wherein the globe has a round cross section of a shoulder portion of the concave groove portion from the outer wall to a bottom portion of the concave groove portion .

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