JP2016201363A - Option holding structure and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an option holding structure capable of preventing reflection glare due to reflection light from a nap ring, and flexibly coping with the thickness or the number of options.SOLUTION: An option holding structure OS1 includes: a holder 70 that has a first holding part 62d contacting with a lower surface P1 in a peripheral end part P of an option OP, is formed into a cylindrical shape with a male screw part 72a on its outer peripheral surface, and has a second holding part 73a provided at its end part and capable of holding the peripheral end part P of the option OP between itself and the first holding part 62d; and a female screw 62a into which the male screw part 72a is screwed.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an option holding structure for holding options such as a lens, a filter, and a louver, and a lighting fixture including the same.

  An illumination device that emits light emitted from a light source after passing through an option such as a lens or a filter is known (see, for example, Patent Document 1).

  This has an LED module (light source), a main body case that houses the LED module and has an opening, and a cover (hood) that is attached to the opening.

  The cover has a circumferential groove (ring groove) formed on its inner peripheral surface, and a snap ring that can be elastically deformed is engaged with the circumferential groove to hold the disk-shaped lens inside the cover. Yes.

JP 2014-107134 A

  By the way, in general, when holding the lens by engaging the snap ring with the ring groove on the inner surface of the hood, it is necessary to slightly protrude the inner peripheral side of the snap ring engaged with the ring groove from the inner peripheral surface of the hood. There is. This is because the peripheral end portion of the lens is sandwiched from both the front and back surfaces by the protruding portion and a part of the hood. For this reason, there is a problem that glare occurs when light from the light source hits the protruding portion.

  Moreover, it is necessary to form in advance a ring groove for engaging the snap ring on the hood side. For this reason, there has been a problem that lenses having different thicknesses or a plurality of lenses cannot be stacked and held.

  The present invention has been made in view of the above-described circumstances, and prevents optional glare caused by reflected light when a snap ring is used, and is an option holding structure that can flexibly cope with the thickness and number of options. And it aims at providing a lighting fixture provided with the same.

  The invention according to claim 1 is an option holding structure for holding an option that is attached to and detached from the vicinity of the light exit of the reflector that reflects the light from the light source, and is in contact with one surface of the peripheral end portion of the option. 1 pinching part and the 2nd pinching part which can be formed in the cylindrical shape which has a thread part in an outer peripheral surface, and can pinch the peripheral end part of the option between the 1st pinching part at the end part It is provided with a holder and a female thread part with which the external thread part is screwed together.

  According to a second aspect of the present invention, in the option holding structure according to the first aspect, the female screw portion and the first clamping portion are formed in a body that houses the reflector.

  The invention according to claim 3 is the option holding structure according to claim 1, wherein the female thread portion and the first clamping portion are formed in a cylindrical hood attached to the light exit port of the reflector. It is characterized by that.

  According to a fourth aspect of the present invention, in the option holding structure according to the first aspect, the female thread portion is formed in a body that houses the reflector, and the first clamping portion is attached to the light exit port of the reflector. It is characterized by being formed into a cone.

  According to a fifth aspect of the present invention, in the option holding structure according to any one of the first to fourth aspects, the holder is configured such that the second holding portion holds the peripheral end portion between the first holding portion and the holder. And when the second clamping part is in contact with the first clamping part without clamping the peripheral edge part between the first clamping part and the first clamping part, the female screw part is covered. And

  The invention according to claim 6 is the option holding structure according to any one of claims 1 to 5, wherein the holder has an outer diameter of a portion located between the male screw portion and the second clamping portion. The internal thread portion is formed smaller than the inner diameter.

  The invention according to claim 7 is the option holding structure according to any one of claims 1 to 6, wherein the holder has a knurled portion on an inner peripheral surface.

  The invention according to claim 8 is the lighting device, wherein the light source, the reflector that reflects the light from the light source and exits from the light exit, and the option holding structure according to any one of claims 1 to 7 It is characterized by comprising.

  According to the first aspect of the present invention, in the option holding structure for holding the option attached / detached in the vicinity of the light exit port of the reflector that reflects the light from the light source, the first contact with one surface at the peripheral end of the option A holder having a first sandwiching portion and a second sandwiching portion that is formed in a cylindrical shape having a threaded portion on the outer peripheral surface and that can sandwich an optional circumferential end portion between the first sandwiching portion and an end portion; A female screw portion to which the male screw portion is screwed.

  As described above, the option holding structure is configured such that the light is reflected by the snap ring, unlike the case where the snap ring is used, by holding the option between the first holding part and the second holding part of the holder. The generated reflection glare can be prevented.

  Further, when a snap ring is used, an annular ring groove to which the snap ring is engaged is provided, so that the thickness of an optional peripheral end is restricted by the position of the ring groove. In other words, the position of the ring groove is determined by the thickness of the optional peripheral end. For this reason, when a snap ring is used, it is difficult to hold options having different peripheral end thicknesses or a plurality of options. On the other hand, in the first aspect of the invention, the holder can arbitrarily adjust the screwing amount of the male threaded portion of the holder with respect to the female threaded portion. You can keep multiple options.

  According to invention of Claim 2, the internal thread part and the 1st clamping part are formed in the body which accommodates a reflector.

  In this case, for example, when it is desired to mount other parts (cone, hood, etc.) below the body, these other parts are less restricted by the configuration and arrangement of the option holding structure. For this reason, the lighting fixture provided with parts other than cylindrical shape, such as a cone cone, can be comprised, for example.

  According to invention of Claim 3, the internal thread part and the 1st clamping part are formed in the cylindrical hood attached to the light-projection opening of a reflector.

  In this case, for example, if the hood is configured to be detachable from the body, the option can be easily exchanged when the type or number of options is to be changed.

  According to the invention of claim 4, the female thread portion is formed in the body that houses the reflector, and the first clamping portion is formed in the cone that is attached to the light exit port of the reflector.

  Thus, even if it is a case where a female screw part and a 1st clamping part are each formed in a separate member, there can exist the effect of Claim 1. Furthermore, by forming the first sandwiching portion in the cone instead of the body, the structure of the body, which tends to be complicated in structure as compared with the cone, can be simplified and the manufacture thereof can be facilitated.

  According to the invention of claim 5, when the second clamping part clamps the optional peripheral end part with the first clamping part, and the optional peripheral end between the second clamping part and the first clamping part The holder internal thread portion is covered in both cases where the first abutting portion is brought into contact without clamping the portion. That is, the holder covers the female thread portion regardless of whether the option is installed.

  Thereby, the holder can prevent the light from the light source or the reflector from hitting the female thread portion regardless of whether the option is mounted or not, and can prevent reflection glare due to the female thread portion.

  According to the invention of claim 6, the holder is formed such that the outer diameter of the portion located between the male screw portion and the second clamping portion is smaller than the inner diameter of the female screw portion.

  As a result, the holder inserts a portion having a small outer diameter into the inside of the female screw portion before starting to screw the male screw portion to the female screw portion, and accordingly, the second portion is quickly The clamping part can be brought close to the other surface of the optional peripheral end part. That is, the operation of bringing the second clamping portion closer to the other surface of the peripheral end portion can be changed from the operation of screwing the screw portion into the female screw portion to the insertion operation. It is possible to shorten the time until the start of clamping by.

  According to the invention of claim 7, the holder has a knurled portion on the inner peripheral surface.

  Thereby, the holder can reduce the reflection glare of the inner peripheral surface.

  According to invention of Claim 8, a lighting fixture is a light source, the reflector which reflects the light from a light source, and radiate | emits from a light-projection opening, The option holding structure which concerns on any one of Claims 1 thru | or 7 And.

  Thereby, the lighting fixture can exhibit the effect of the above-mentioned option holding structure as a whole.

1-13 is a figure explaining Embodiment 1, FIG. 1 is an exploded perspective view of the lighting fixture 1. FIG. It is sectional drawing of the lighting fixture 1 cut by the plane which passes along the central axis C1, and the elements on larger scale. It is the perspective view which looked at the food | hood 60 from diagonally upward. It is an AA line arrow enlarged view in FIG. (A)-(E) is a figure explaining the holder (option holder) 70, (A) is a front view, (B) is a top view, (C) is a right view, (D) is (D). B) A-A line arrow figure in the inside, (E) is the perspective view seen from diagonally downward. It is the perspective view which looked at the holder 70 from diagonally upward. It is an AA line arrow enlarged view in FIG. (A)-(E) is a figure explaining the holder 70, (A) is the perspective view seen from diagonally upward, (B) is the elements on larger scale in (A), (C) is a rear view. (D) is a top view, (E) is an AA line arrow enlarged view in (D). It is sectional drawing which cut | disconnected the plane which passes along the central axis C1, explaining the state which attached the holder 70 inside the food | hood 60. FIG. FIG. 6 is a cross-sectional view illustrating how the peripheral end portion P of the option OP is clamped between the first clamping portion 62d of the hood 60 and the second clamping portion 73a of the holder 70. (A) shows the case where protective glass G and filter F are not attached, (B) shows the case where one piece of protective glass G is attached, and (C) shows the case where one piece of filter F is attached. (D) is sectional drawing which shows the case where one piece of protective glass G and one filter F are mounted | worn. (A) shows a case where two filters F are mounted, (B) shows a case where one protective glass G and two filters F are mounted, and (C) shows one sharpener SH. The case where it mounted | worn is shown, (D) is sectional drawing which shows the case where 1 sheet of protective glass G and 1 sharpener SH are mounted | worn. (A)-(E) is a figure explaining holder 70A, (A) is a front view, (B) is a top view, (C) is a right view, (D) is a figure in (B). AA arrow directional view, (E) is the perspective view seen from diagonally downward. (A) is sectional drawing which cut the lighting fixture 2 of Embodiment 2 with the plane which passes along the central axis C1, (B) is the enlarged view of the part B in (A) explaining the option holding structure OS2. is there. FIG. 15 is a diagram corresponding to FIG. 14B for explaining an option holding structure OS3 of the third embodiment.

  Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings. In addition, in each drawing, the member etc. which attached | subjected the same code | symbol are the things of the same or similar structure, The duplication description about these shall be abbreviate | omitted suitably. Moreover, in each drawing, members and the like that are not necessary for the description are omitted as appropriate.

<Embodiment 1>
With reference to FIGS. 1-13, the option holding structure OS1 which concerns on Embodiment 1 to which this invention is applied, and the lighting fixture 1 provided with the same are demonstrated. In the following description, for convenience of explanation, “up / down / left / right” indicated by arrows on the upper left in FIGS. 1 and 2 is described as corresponding to up / down / left / right of the option holding structure OS1, the lighting fixture 1, etc. Absent. According to this, the central axis C1 of the lighting fixture 1 is facing the up-down direction.

  The lighting fixture 1 is demonstrated with reference to FIG. 1, FIG.

  Here, FIG. 1 is an exploded perspective view of the luminaire 1 as viewed obliquely from above. FIG. 2 is a cross-sectional view of the luminaire 1 taken along a plane passing through the central axis C1.

  As will be described in detail later with reference to FIG. 9, the option holding structure OS1 of the present embodiment has a first holding portion 62d, a threaded portion 72a on the outer peripheral surface, and a second holding portion 73a at the end. A holder 70 having an internal thread 72a to which the external thread 72a is screwed. Further, both the female screw part 62 a and the first clamping part 62 d are formed on the hood 60.

  The lighting fixture 1 includes a socket 10, a light source 20, a body 30, a reflector 40, and a hood 60. These are formed and arranged with respect to the central axis C1.

  Among these, the socket 10 has a cylindrical outer wall 11, a heat sink 12 disposed inside the outer wall 11, and a plurality of heat radiation fins 13 disposed radially between the heat sink 12 and the outer wall 11. ing. The lower surface of the heat sink 12 is formed flat and serves as a light source mounting surface 12a.

  The light source 20 is attached to the light source attachment surface 12a. As the light source 20, for example, a COB chip-on-board (COB type) planar light source can be used.

  The body 30 is formed in a substantially cylindrical shape, and its upper end is fixed to the lower end of the socket 10 described above.

  For example, the reflector 40 is formed in a rotating body shape in which a part of a parabola is rotated with respect to the central axis C1. The reflector 40 has a reflection surface 40a on the inner side, a light incident port (opening) 40b facing the light source 20 is formed at the upper end, and a light emission port (opening) facing downward at the lower end. 40c is formed. The reflector 40 has an upper end stored inside the socket 10 and a remaining lower end stored inside the body 30. The reflector 40 controls the light emitted from the light source 20 and incident from the light incident port 40b as direct light or reflected by the reflecting surface 40a, and is emitted as reflected light from the light emitting port 40c.

  The option holding structure OS1 will be described with reference to FIGS. 3 to 12 in addition to FIGS. 1 and 2 described above.

  3 and 4 are diagrams for explaining the hood 60, FIG. 3 is a perspective view seen from obliquely above, and FIG. 4 is an enlarged view taken along the line AA in FIG.

  As shown in FIG. 2, the hood 60 is formed in a substantially cylindrical shape. A substantially cylindrical holder (optional holder) 70 is disposed inside the hood 60.

  The option holding structure OS1 includes a hood 60 having a female screw portion 62a and a first holding portion 62d, and a holder 70 having a male screw portion 72a and a second holding portion 73a.

  As shown in FIGS. 2, 3, and 4, the hood 60 is attached to the light emission port 40 c of the reflector 40. The hood 60 is formed smoothly with no unevenness on the outer peripheral surface a, whereas the inner peripheral surface b is formed with unevenness toward the inside.

  Here, the hood 60 is roughly divided into three along the vertical direction, and an upper portion 61, an intermediate portion 62, and a lower portion 63 are formed in order from the top. The upper portion 61 and the lower portion 63 are formed in a relatively thin cylindrical shape, and the remaining intermediate portion 62 is formed in a relatively thick cylindrical shape.

  The upper part 61 is engaged with the lower end part of the body 30 and can be attached to the inner peripheral surface b1, and the connecting part 61b to which the end part of the safety wire (falling prevention wire) is connected. Is protruding. The inner peripheral surface b1 has a shape with relatively few irregularities except for the engaging portion 61a and the connecting portion 61b.

  On the inner peripheral surface b2 of the intermediate portion 62, a female screw portion 62a, a relief portion 62b, a ring groove 62c, and a first clamping portion 62d are formed in order from the top.

  Among these, the female thread portion 62 a is set such that the valley diameter is smaller than the inner diameter of the inner peripheral surface b <b> 1 of the upper portion 61. In other words, the female thread portion 62a is formed such that the screw thread projects inward from the inner peripheral surface b1. The female thread portion 62a is formed, for example, for 5 to 6 pitches.

  The escape portion 62b is for processing the female screw portion 62a, and is provided adjacent to the lower side of the female screw portion 62a. The inner diameter of the escape portion 62b is set to be slightly larger than the diameter of the valley of the female screw portion 62a, and the height of the escape portion 62b (the dimension in the direction along the central axis C1) is a male screw of the holder 70 described later. When the portion 72a is screwed into the female screw portion 62a, the male screw portion 72a is set to be able to enter about one pitch.

  The ring groove 62c is adjacent to the lower side of the escape portion 62b through the wall portion 62e. The inner diameter of the wall part 62e is smaller than the inner diameter of the escape part 62b, and is the same as the inner diameter dn of the female thread part 62a. The ring groove 62c is formed over the entire circumference of the inner peripheral surface b2 of the intermediate portion 62, and the inner diameter thereof is set slightly larger than the inner diameter dn of the female screw portion 62a. The ring groove 62c is a groove in which a snap ring (retaining ring) R for mounting a protective glass G as an option OP described later is engaged.

  The first clamping portion 62d is formed below the ring groove 62c by a length corresponding to the thickness of the protective glass G, and protrudes toward the central axis C1 over the entire circumference of the inner peripheral surface b2. Yes. The upper surface 62f of the first clamping portion 62d, that is, the surface that contacts the lower surface (one surface) P1 of the peripheral end portion P (see FIG. 10) of the option OP is formed flat over the entire circumference. The inner diameter of the upper surface 62f is set smaller than the inner diameter dn of the female screw portion 62a. As a result, the first clamping portion 62d can support the lower surface P1 of the peripheral end portion P of the option OP from below by the upper surface 62f. The lower surface 62g of the first clamping part 62d is formed in a tapered surface shape whose inner diameter increases toward the lower side. This prevents direct light from the above-described light source 20 or reflected light from the light source 20 and reflected by the reflector 40 from hitting.

  The lower part 63 has the baffle process part 63a in the internal peripheral surface b3. The light hitting this baffle processing part 63a from above is returned upward without falling down.

  Next, with reference to FIGS. 5 to 8, a holder (option holder) 70 attached to the hood 60 will be described.

  5A to 5E are views for explaining the holder (option holder) 70, in which (A) is a front view, (B) is a plan view, (C) is a right side view, (D) is the AA arrow directional view in (B), (E) is the perspective view seen from diagonally downward.

  FIG. 6 is a perspective view of the holder 70 as viewed obliquely from above.

  FIG. 7 is an enlarged view taken along line AA in FIG.

  8A to 8E are views for explaining the holder 70, in which (A) is a perspective view seen obliquely from above, (B) is a partially enlarged view in (A), (C ) Is a rear view, (D) is a plan view, and (E) is an enlarged view taken along line AA in (D).

  As shown in FIGS. 5 to 7, the holder 70 is formed in a substantially cylindrical shape as a whole. An inner peripheral surface c of the holder 70 is a knurled portion 70a. In the knurled portion 70a, a large number of ridges and recesses facing in the vertical direction (substantially parallel to the central axis C1) are alternately arranged along the circumferential direction. Here, the holder 70 is roughly divided into three along the central axis C1, and an upper portion 71, an intermediate portion 72, and a lower portion 73 (a portion located between the male screw portion 72a and the second clamping portion 73a) in order from the top. ). The upper portion 71 and the lower portion 73 are formed in a relatively thin cylindrical shape, and the remaining intermediate portion 72 is formed in a relatively thick cylindrical shape.

  A serrated portion 71a is formed on the upper end surface of the upper portion 71 over substantially the entire circumference. The serrated portion 71a is continuous with the knurled portion 70a described above, and is formed in a shape such that the knurled portion 70a is turned sideways. The serrated portion 71a is for diffusing light.

  As shown in FIG. 8, engagement grooves 71b are provided at two positions on the upper end surface of the upper portion 71, that is, at positions 180 degrees apart from each other with respect to the central axis C1 so as to interrupt the sawtooth portion 71a. It is. The engagement groove 71 b is a groove for engaging a tool (not shown) for rotating the holder 70. That is, when the holder 70 is screwed into or released from the hood 60, it is necessary to rotate the holder 70 in the screwing direction or in the opposite direction. May be difficult. In such a case, a tool is engaged with the engagement groove 71b, and the holder 70 is rotated by this tool.

  The engagement groove 71b is formed so as to communicate the inner side and the outer side of the upper end portion of the upper portion 71, and has a bottom surface e and a pair of side surfaces f facing each other. The portions of the bottom surface e and the side surface f that are located outside are subjected to a taper process to form inclined surfaces e1 and f1. As shown in FIG. 8E, the inclined surface e1 is, for example, an inclined surface that is inclined downward by 45 degrees toward the outside. On the other hand, as shown in FIG. 8D, the inclined surfaces f1 and f1 are, for example, inclined surfaces that spread outward at an angle of 98 degrees. The reason why the inclined surfaces e1 and f1 are provided in the engagement groove 71b in this way is to secure a minimum surface for hooking the tool as the bottom surface e and the side surface f, and to make the rest as the inclined surfaces e1 and f1, This is to diffuse the reflected light.

  As shown in FIGS. 5 to 7, a male screw portion 72 a is formed (threaded) on the outer peripheral surface d <b> 2 of the intermediate portion 72. The male threaded portion 72 a is set so that the valley diameter is slightly larger than the outer diameters of the outer peripheral surfaces d 1 and d 3 of the upper portion 71 and the lower portion 73. That is, the thread of the external thread portion 72a is formed so as to protrude outward with respect to the outer peripheral surfaces d1 and d3 of the upper portion 71 and the lower portion 73. In the present embodiment, the external thread portion 72a is formed for about 3 pitches. The holder 70 can maintain a stable posture when all the three pitches of the external thread 72a are screwed into the female thread 62a of the hood 60 described above.

  A lower end portion of the lower portion 73 is a second holding portion 73a that holds the peripheral end portion P of the option OP between the first holding portion 62d of the hood 60 described above. The lower end surface 73b of the second clamping portion 73a is a surface that presses the upper surface (the other surface) P2 of the peripheral end portion P of the option OP, and is formed flat over the entire circumference.

  In the lower portion 73, the outer diameter dm (see FIG. 7) of the outer peripheral surface d3 is set smaller than the inner diameter dn (see FIG. 4) of the female screw portion 62a of the hood 60 and the inner diameter of the wall portion 62e (see FIG. 4). dm <dn). For this reason, before starting the screwing of the female screw portion 72a of the holder 70 from above with respect to the female screw portion 62a of the hood 60, the lower portion 73 is inserted inside the female screw portion 62a. The end face 73b can be brought close to the option OP. As a result, the option OP can be quickly held.

  At the lower end of the outer peripheral surface d3 of the lower portion 73, an annular notch 73c is formed over the entire circumference. The annular notch 73c is for preventing interference with the snap ring R that fixes the protective glass G, as will be described later.

  FIG. 9 is a cross-sectional view taken along a plane passing through the central axis C <b> 1 for explaining a state in which the above-described holder 70 is mounted (screwed) inside the above-described hood 60. In this state, neither the protective glass G nor the option OP is attached, and the screw portion 72a of the holder 70 is screwed into the female screw portion 62a of the hood 60, and the lower end surface 73b of the second clamping portion 73a of the holder 70 is In this state, the upper surface 62f of the first sandwiching portion 62d of the hood 60 is in direct contact (contact).

  Here, as shown in FIG. 9, the height in the vertical direction of the holder 70, that is, the height (distance) from the second sandwiching portion 73a (the lower end surface 73b) of the holder 70 to the serrated portion 71a (the upper end). ) And X, and the height (distance) from the first clamping portion 62d (the upper surface 62f) of the hood 60 to the upper surface 62h of the female screw portion 62a is defined as Y. Further, the pitch of the female thread portion 62a is defined as a pitch N.

In the example shown in FIG. 9, these X, Y, and N are between them.
X = Y-N / 2
The relationship is established.

  That is, in this state, the upper end of the serrated portion 71a of the holder 70 is located below the upper surface 62h of the female thread portion 62a of the hood 60 (in the illustrated example, lower by about N / 2 pitch). The female thread portion 62a is exposed by N / 2 pitches. In this case, the light from the light source 20 or the light emitted from the light source 20 and reflected by the reflector 40 may strike the exposed portion and cause reflection glare.

  Therefore, in the present embodiment, the height X ′ of the holder 70 is set to be larger than the height Y (see the two-dot chain line), and the female screw portion 62 a is covered with the holder 70. As a result, in the case where there is an option OP as well as in the case where there is no option OP, the internal thread 62a is covered by the holder 70, and reflection glare caused by exposure of part of the internal thread 62a is effectively prevented. It becomes possible.

  Note that a holder 70A shown in FIG. 13 may be used instead of the holder 70 shown in FIG.

  Here, FIGS. 13A to 13E are views for explaining the holder 70A, in which (A) is a front view, (B) is a plan view, (C) is a right side view, and (D) is a view. (B) AA arrow directional view in (B), (E) is the perspective view seen from diagonally downward.

  Like the holder 70, the holder 70A is formed in a substantially cylindrical shape. The holder 70A and the holder 70 are different in the shape of the knurled portions 70a ′ and 70a provided on the inner peripheral surfaces thereof, and the other configurations are the same.

  That is, as described above, the knurled portion 70a of the holder 70 is formed with a large number of ridges and recesses parallel to the central axis C1 along the circumferential direction. On the other hand, the knurled portion 70a ′ of the holder 70A has a large number of annular convex portions and concave portions along the circumferential direction that are alternately formed along the vertical direction. For example, the knurled portion 70a ′ may have the same shape as the baffle processed portion 63a shown in FIG.

  According to this knurl processing part 70a ', compared with the knurl processing part 70a, it is possible to return more light hitting the knurl processing part 70a from above, so that it goes downward from the lower end of the holder 70A. The amount of uncontrolled light can be reduced.

  An example in which the option OP is held by the hood 60 and the holder 70 will be described with reference to FIGS.

  Here, FIG. 10 is a cross-sectional view illustrating how the peripheral end portion P of the option OP is clamped between the first clamping portion 62d of the hood 60 and the second clamping portion 73a of the holder 70.

  As the option OP, a protective glass G, a filter F, and a sharpener (a type of louver) SH are used. Among these, depending on the country where the lighting apparatus 1 is used, there is a country in which the protection glass G is required to be installed by law. The protective glass G and the filter F are formed in a substantially disk shape, and at least at the peripheral end portion P, the lower surface P1 and the upper surface P2 are formed in a plane parallel to each other. And the lower end P1 and the upper surface P2 are clamped by the 1st clamping part 62d of the food | hood 60, and the 2nd clamping part 73a of the holder 70, respectively. Further, the sharpener SH (see FIG. 12C) has a cylindrical louver portion P3 in the center, and has an annular periphery at the outer ends of a plurality of arms P4 extending radially outward from the lower end. The end P is connected. The peripheral end portion P has a lower surface P1 and an upper surface P2 that are parallel to each other, like the peripheral end portion P of the protective glass G and the filter F described above. In addition, the thickness (distance between the lower surface P1 and the upper surface P2) of each of the protective glass G and the filter F as the option OP is the same, and the thickness of the peripheral end portion P of the sharpener SH is It is assumed that it is twice the thickness of the protective glass G and the peripheral edge part P of the filter F.

  FIG. 11A shows a case where none of the protective glass G, the filter F, and the sharpener SH is attached. In this case, the second holding portion 73a on the holder 70 side is inserted into the first holding portion 62d on the hood 60 side by screwing the male screw portion 72a on the holder 70 side into the female screw portion 62a on the hood 60 side as much as possible. It is in contact.

  FIG. 11B shows a case where one protective glass G is attached. When the protective glass G is attached, the protective glass G first engages, for example, a C-shaped snap ring (retaining ring) R in the ring groove 62c of the hood 60 regardless of whether or not the other option OP is attached. By combining, the protective glass G is fixed on the first clamping part 62d. Thereafter, the screw portion 72a is screwed into the female screw portion 62a, and the peripheral end portion P of the protective glass G is held between the first holding portion 62d and the second holding portion 73a. As described above, when it is essential to attach the protective glass G, the protective glass G can be relatively easily removed by removing the holder 70 from the hood 60 only by clamping the first clamping part 62d and the second clamping part 73a. It can be removed. In order to prevent this, fixing with the snap ring R is also used. At this time, if the snap ring R remains exposed, reflection glare may be generated by the reflected light reflected by the snap ring R, as in the prior art. Therefore, by holding the holder 70, the snap ring R is covered with the annular notch 73c at the lower end of the holder 70 to prevent the reflection glare.

  In addition, when mounting | wearing of the protection glass G is not essential, the 1st clamping part 62d and the 2nd clamping part 73a do not use the snap ring R for the protection glass G like other filters F and sharpener SH. It is also possible to only hold it.

  FIG. 11C shows a case where one filter F is attached. In this case, the peripheral end portion P of the filter F is clamped by the first clamping portion 62d and the second clamping portion 73a.

  FIG. 11D shows a case where one protective glass G and one filter F are attached. In this case, as shown in FIG. 11B described above, after the protective glass G is mounted using the snap ring R, the filter F is overlaid on the protective glass G, and the peripheral edge of the protective glass G P and the peripheral end portion P of the filter F are collectively held between the first holding portion 62d and the second holding portion 73a.

  At this time, an annular notch similar to the annular notch 73c of the holder 70 described above may be formed on the outer peripheral side of the lower surface P1 of the peripheral end portion P of the filter F that is overlaid. Thereby, while preventing the peripheral edge part P of the filter F from interfering with the snap ring R, the snap ring R can be covered and the reflection glare by the snap ring R can be prevented.

  FIG. 12A shows a case where two filters F are mounted. Two filters F are overlapped, and each peripheral end portion P is put together and sandwiched between the first sandwiching portion 62d and the second sandwiching portion 73a.

  FIG. 12B shows a case where one protective glass G and two filters F are attached. In this case, first, the protective glass G is attached using the snap ring R as shown in FIG. Thereafter, two filters F are overlaid on the protective glass G, and the peripheral end portion P of the protective glass G and the peripheral end portions P of the two filters F are combined to form a first sandwiching portion 62d and a second sandwiching portion. 73a.

  FIG. 12C shows a case where one sharpener SH is attached. In this case, the peripheral end portion P of the sharpener SH is sandwiched between the first sandwiching portion 62d and the second sandwiching portion 73a in the same manner as when one filter F is mounted.

  FIG. 12D shows a case where one protective glass G and one sharpener SH are attached. In this case, as shown in FIG. 11B, after the protective glass G is mounted using the snap ring R, the sharpener SH is stacked on the protective glass G, and the peripheral edge of the protective glass G The portion P and the peripheral end portion P of the sharpener SH are collectively held between the first holding portion 62d and the second holding portion 73a.

  At this time, an annular notch similar to the annular notch 73c of the holder 70 described above may be formed on the outer peripheral side of the lower surface P1 of the peripheral end portion P of the sharpener SH that is overlaid. This prevents the peripheral end portion P of the sharpener SH from interfering with the snap ring R, and further covers the snap ring R to prevent reflection glare due to the snap ring R.

  The functions and effects of the option holding structure OS1 and the lighting fixture 1 described above will be summarized.

  The option holding structure OS1 holds an option OP that is attached to and detached from the vicinity of the light exit port 40c of the reflector 40 that reflects light from the light source 20. The option holding structure OS1 is formed in a cylindrical shape having a first holding portion 62d that comes into contact with the lower surface P1 of the peripheral end portion P of the option OP and a screw portion 72a on the outer peripheral surface, and the first holding portion at the end portion. The holder 70 which has the 2nd clamping part 73a which can clamp the peripheral end part P of option OP between the parts 62d, and the internal thread part 62a which the external thread part 72a screws together are provided. Further, in the option holding structure OS1, the female thread portion 62a and the first clamping portion 62d are both formed in a cylindrical hood 60 that is attached to the light emission port 40c of the reflector 40.

  As described above, the option holding structure OS1 is different from the case where the snap ring is used by holding the option OP between the first holding portion 62d and the second holding portion 73a of the holder 70, so that the light is snap ring. Reflective glare caused by reflection can be prevented.

  Further, when a snap ring is used, it is necessary to provide an annular ring groove in which the snap ring is engaged with the inner peripheral surface b of the hood 60. Therefore, depending on the position of the ring groove, the peripheral end portion of the option OP P thickness is limited. In other words, the position of the ring groove is determined by the thickness of the peripheral end portion P of the option OP. For this reason, when using a snap ring, it is difficult to hold an option OP having a different thickness at the peripheral end portion P or a plurality of option OP in a stacked manner. On the other hand, since the option holding structure OS1 of the present embodiment can arbitrarily adjust the screwing amount of the male screw portion 72a of the holder 70 with respect to the female screw portion 62a of the hood 60, the thickness of the peripheral end portion P can be adjusted. Option OPs with different lengths or a plurality of option OPs can be held in piles.

  Furthermore, since both the female screw portion 62a and the male screw portion 72a are formed on the hood 60, for example, if the hood (see FIG. 14) is detachably attached to the body 30, the type and number of options OP When it is desired to change the option OP, the option OP can be easily exchanged.

  In the option holding structure OS1, when the second holding portion 73a holds the peripheral end portion P of the option OP with the first holding portion 62d, and between the second holding portion 73a and the first holding portion 62d, The holder 70 covers the female thread portion 62a of the hood 60 in both cases where the peripheral end portion P of the option OP is not held and is brought into contact with the first holding portion 62d. That is, the holder 70 covers the female thread 62a of the hood 60 regardless of whether the option OP is attached.

  Thereby, the holder 70 can prevent the light from the light source 20 or the reflector 40 from hitting the female screw portion 62a regardless of whether the option OP is attached, and can prevent reflection glare due to the female screw portion 62a.

  The holder 70 is formed such that the outer diameter dm of the outer peripheral surface d3 of the lower portion 73 (the portion located between the male screw portion 72a and the second clamping portion 73a) is smaller than the inner diameter dn of the female screw portion 62a. .

  As a result, the holder 70 inserts a portion having a small outer diameter dm into the inside of the female screw portion 62a substantially linearly before starting the screwing of the male screw portion 72a to the female screw portion 62a. Accordingly, the second holding portion 73a can be quickly brought closer to the upper surface (the other surface) P2 of the peripheral end portion P of the option OP. That is, the operation of bringing the second clamping portion 73a closer to the upper surface P2 of the peripheral end portion P can be changed from the operation of screwing the screw portion 72a to the female screw portion 62a to the insertion operation. 2 It is possible to shorten the time until the start of clamping by the clamping unit 73a.

  The holder 70 has a knurled portion 70a on the inner peripheral surface c.

  Thereby, the holder 70 can reduce the reflection glare of the inner peripheral surface c.

  -The lighting fixture 1 is provided with the light source 20, the reflector 40 which reflects the light from the light source 20, and radiate | emits from the light exit 40c, and option holding structure OS1.

  Thereby, the lighting fixture 1 can have the effect of the above-mentioned option holding structure OS1 as a whole.

<Embodiment 2>
With reference to FIG. 14, the option holding | maintenance structure OS2 which concerns on Embodiment 2 to which this invention is applied, and the lighting fixture 2 provided with the same are demonstrated.

  Here, FIG. 14A is a cross-sectional view of the lighting fixture 2 according to the second embodiment cut along a plane passing through the central axis C1, and FIG. 14B illustrates the option holding structure OS2. FIG.

  The lighting fixture 2 includes a socket 10A, a light source 20A, a body 30A, a reflector 40A, and a cone 80.

  The socket 10A and the light source 20A are not particularly limited, and arbitrary ones can be used.

  The body 30A has an inner cylinder portion 31, an outer cylinder portion 32 each formed in a substantially cylindrical shape, and a plurality of heat radiation fins 33 arranged radially between them, and is attached to the lower end of the socket 10A. ing. An internal thread portion 62a is formed on the inner peripheral surface of the inner cylindrical portion 31 (the inner peripheral surface of the body 30A. The first clamping portion 62d is formed at the lower end of the inner cylindrical portion 31 (lower end of the body 30A). The first holding part 62d is formed so as to protrude inward over the entire circumference of the lower end of the inner cylinder part 31.

  The reflector 40A is formed in a substantially spheroid shape. The reflector 40A has a reflection surface 40a formed on the inner surface. The upper opening is a light incident port 40b through which light from the light source 20A is incident, and the lower opening is a light emitting port 40c through which light is emitted.

  The holder 70 is the same as the holder 70 of the first embodiment described above. That is, the holder 70 is formed in a substantially cylindrical shape, has a knurled portion 70a on the inner peripheral surface, and has a male screw portion 72a (threaded) on the outer peripheral surface. Further, a second clamping part 73 a is formed at the lower end of the holder 70. The holder 70 is disposed in the vicinity of the light emission port 40c of the reflector 40A by screwing the male screw portion 72a with the female screw portion 62a of the body 30A. In place of the holder 70 having the knurled portion 70a, a holder 70A having a knurled portion 70a 'shown in FIG. 13 may be used.

  The cone 80 is formed in a truncated cone shape that spreads downward. The cone 80 is attached to the lower end of the inner cylinder portion 31 (the lower end of the body 30 </ b> A) via an annular packing 81.

  As the option OP, in the example shown in FIG. 14, a substantially disk-shaped lens is used.

  The option OP is such that the lower surface P1 and the upper surface P2 of the peripheral end portion P are respectively engaged with the first screw portion 62d and the second pinch 73a by screwing the male screw portion 72a of the holder 70 to the female screw portion 62a of the inner cylinder portion 31. It is pressed and clamped. As a result, the option OP is held in the vicinity of the lower side of the light emission port 40c of the reflector 40A so as to cover the light emission port 40c.

  The option holding structure OS2 includes a first holding part 62d, a holder 70 having a screw part 72a on the outer peripheral surface and a second holding part 73a at the end, and a female screw part 62a into which the male screw part 72a is screwed. It has.

  In the option holding structure OS1 of the first embodiment described above, both the female thread portion 62a and the first clamping portion 62d are formed on the hood 60. On the other hand, in the option holding structure OS2 of the present embodiment, the female thread portion 62a and the first clamping portion 62d are both formed on the body 30A, not the hood 60.

  As a result, the option holding structure OS2 can provide the following effects in addition to the effects of the option holding structure OS1 of the first embodiment.

  For example, when it is desired to mount other parts (cone 80, hood, etc.) below the body 30A, the option holding structure OS2 has few restrictions due to the configuration and arrangement of the option holding structure OS2. For this reason, the lighting fixture provided with parts other than cylindrical shape, such as a conical cone, can be comprised easily, for example.

<Embodiment 3>
With reference to FIG. 15, an option holding structure OS3 according to the third embodiment to which the present invention is applied will be described.

  Here, FIG. 15 is a diagram corresponding to FIG.

  The option holding structure OS3 includes a first holding portion 62d, a holder 70 having a screw portion 72a on the outer peripheral surface and a second holding portion 73a at the end, and a female screw portion 62a into which the male screw portion 72a is screwed. It has.

  In the option holding structure OS2 of the second embodiment described above, the first holding portion 62d formed at the lower end of the body 30A is formed at the upper end of the cone 80A instead of the body 30B in the option holding structure OS3 of the present embodiment. ing. That is, in the option holding structure OS2 of the second embodiment, both the female thread portion 62a and the first clamping portion 62d are formed on the body 30A. On the other hand, in the option holding structure OS3 of the third embodiment, the female thread portion 62a is formed in the body 30A, and the first clamping portion 62d is formed in a cone 80A that is a separate member from the body 30A.

  As a result, the option holding structure OS3 can achieve the following effects in addition to the effects of the option holding structure OS1 of the first embodiment.

  As described above, the option holding structure OS3 has substantially the same effect as the option holding structure OS1 of the first embodiment even when the female thread portion 62a and the first clamping portion 62d are formed of different members. be able to. Furthermore, the option holding structure OS3 is manufactured by simplifying the structure of the body 30B, which tends to be complicated compared to the cone 80A, by forming the first clamping portion on the cone 80A instead of the body 30B. Can be easily.

DESCRIPTION OF SYMBOLS 1, 2 Lighting fixture 20, 20A Light source 30, 30A, 30B Body 40, 40A Reflector 40c Light emission port 60 Hood 62a Female thread part 62d 1st clamping part 70 Holder (option holder)
70a Knurled part 72a Male thread part 73 Lower part (portion located between the male thread part and the second clamping part)
73a 2nd clamping part 80,80A Cone a Outer peripheral surface of hood main body b Inner peripheral surface of hood main body b2 Inner peripheral surface of intermediate part c Inner peripheral surface of holder d Outer peripheral surface of holder d2 Outer peripheral surface of intermediate part d3 Outer peripheral part of lower part Surface dm Outer diameter of lower part (portion located between male screw part and second clamping part) dn Inner diameter of female screw part OP Option OS1 Option holding structure of Embodiment 1 OS2 Option holding structure of Embodiment 2 OS3 Embodiment Option holding structure 3 P Optional peripheral edge P1 Lower surface of the peripheral edge (one surface)
P2 Upper surface of the peripheral edge (the other surface)

Claims (8)

In an option holding structure for holding an option to be attached / detached near the light exit of the reflector that reflects light from the light source,
A first sandwiching portion that contacts one surface of the optional peripheral end;
A holder having a second clamping portion that is formed in a cylindrical shape having a threaded portion on an outer peripheral surface, and that can sandwich the optional circumferential end portion between the first clamping portion and an end portion;
A female screw part to which the male screw part is screwed,
Optional holding structure characterized by that. The female screw part and the first clamping part are formed in a body that houses the reflector,
The option holding structure according to claim 1, wherein: The female screw part and the first clamping part are formed in a cylindrical hood attached to the light exit port of the reflector.
The option holding structure according to claim 1, wherein: The female thread portion is formed on a body that houses the reflector,
The first clamping part is formed in a cone attached to the light exit port of the reflector.
The option holding structure according to claim 1, wherein: The holder is
When the second clamping part clamps the peripheral end part between the first clamping part and the second clamping part does not clamp the peripheral end part between the first clamping part and the first clamping part. 1 when it is in contact with the clamping part, the female thread part is covered;
The option holding structure according to any one of claims 1 to 4, wherein the option holding structure is provided. The holder is
The outer diameter of the part located between the male screw part and the second clamping part is formed smaller than the inner diameter of the female screw part,
The option holding structure according to claim 1, wherein the option holding structure is provided. The holder is
It has a knurled part on the inner peripheral surface,
The option holding structure according to claim 1, wherein the option holding structure is provided. A light source;
A reflector that reflects light from the light source and emits it from a light exit port;
An option holding structure according to any one of claims 1 to 7,
A lighting apparatus characterized by that.

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