WO2014061157A1

WO2014061157A1 - Glare cut cap and lighting equipment equipped with glare cut cap

Info

Publication number: WO2014061157A1
Application number: PCT/JP2012/077127
Authority: WO
Inventors: 佐藤　哲也
Original assignee: 株式会社モデュレックス
Priority date: 2012-10-19
Filing date: 2012-10-19
Publication date: 2014-04-24
Also published as: JPWO2014061157A1

Abstract

Provided is a glare cut cap and lighting equipment equipped with the glare cut cap, which effectively use even direct light from a light source that was conventionally interrupted by the glare cut cap as illumination light. A glare cut cap (30) is made of a light transmissive material and formed in a shape to function as a lens or a prism to control light that enters inside the glare cut cap from an opening (31) by diffusing, converging, scattering and/or refracting the light into a prescribed state when light passes therethrough. The glare cut cap (30) is mounted at the tip part of a light source (10) in a lighting equipment (1) which includes the light source (10), and a reflector (20) which reflects light from the light source (10) to emit the light forward, so that an opening edge (31a) is positioned on a line (γ) that extends from a top end (β) on the inner surface of a cone (50) so as to be in contact with the outer surface of a light emitting part (α) in the light source (10).

Description

A glare cut cap and a lighting fixture having the glare cut cap

The present invention relates to a glare cut cap and a lighting fixture including the glare cut cap. More specifically, the light from a light source is reflected by a reflector, and the reflected light is used as illumination light to control the light by the reflector. In order to prevent direct light from a light source that cannot be controlled by the reflector from being used as illumination light in a lighting fixture to be performed, the glare cut cap used by being attached to the tip of the light source and the glare cut cap are provided It relates to lighting equipment.

As shown in FIG. 13, the luminaire 100 generally includes a light source 110 such as a high-intensity lamp and a reflector 120 for reflecting the light from the light source 110. By covering with a glare cut cap 130 formed of a light-shielding material such as glass or ceramics, uncontrollable light that is not incident on the reflector 120 out of light generated by the light source 110 is cut and reflected by the reflector 120. By using only the illuminating light as illumination light, the direction, convergence, and diffusion of the light used for illumination are controlled as desired, and the unpleasant glare that is felt when the light from the light source directly enters the field of view. Measures such as reduction are taken (see Patent Document 1).

However, when a part of the light emitted from the light source 110 is blocked by the attachment of the glare cut cap 130, a part of the light generated by the light source 110 is lost without being used for illumination. The light source 110 capable of generating a larger amount of light than the necessary amount of light is required, and the entire lighting fixture 100 is increased in size.

On the other hand, such a luminaire 100 is designed so that appropriate illumination can be performed by reflected light from the reflector 120 in a state in which direct light from the light source is cut by the glare cut cap 130. Therefore, if the glare cut cap 130 is removed from such a lighting fixture, the amount of light that can be used for lighting increases and the brightness increases, but not only unpleasant glare can be suppressed, but also lighting. Illumination unevenness occurs such that the central portion and the peripheral portion of the light are brighter than other portions.

Therefore, by installing the glare cut cap 130 and making it possible to use the light incident on the glare cut cap 130 for illumination, the light quantity can be increased without increasing the size of the light source, thereby further increasing the brightness. It has also been proposed to be able to obtain.

As such a luminaire 100, as shown in FIG. 14, an auxiliary reflection plate 136 that protrudes outward from the opening end of the glare cut cap 130 is provided around, and the center of the light source 110 is focused on the auxiliary reflection plate 136. A parabolic auxiliary reflecting surface 136a is formed, and the axis of the auxiliary reflecting surface 136a is tilted with respect to the central axis of the light source 110 in the range of more than 0 ° to less than 90 °, whereby the glare cut cap 130 is formed. It has been proposed that light incident on the light is reflected by the reflector 120 and used as illumination light (Patent Document 2).

Unlike the aforementioned glare cut cap that covers only the tip of the light source for the purpose of cutting light that cannot be controlled by the reflector, a bulb cap that covers the entire light source including the outer periphery of the light emitting point of the light source is provided. By forming a diffusion step at the top and a light-blocking portion that prevents light transmission at the top or / and a step for changing the direction of the light, and by providing a valve cap with an outer shape that matches the surface pattern of the reflector as a whole There has also been proposed a vehicular marker lamp that eliminates the need for providing a fish-eye step on the front lens disposed in front of the reflector (Patent Document 3).

Japanese Special Table 2008-147044 (Figure 1, [0043] column) Japanese Unexamined Patent Publication No. 2010-170738 (FIG. 4) Japanese Patent Laid-Open No. 10-230779 (FIGS. 1 and 3)

Among the conventional techniques described above, in the invention described in Patent Document 2, the auxiliary reflector 136 is provided on the glare cut cap 130 as shown in FIG. 14, and the auxiliary reflector 136 is provided with the auxiliary reflector 136a. In the past, the light absorbed by the glare cut cap 130 without being used as illumination light is reflected by the reflector 120 so that it can be used as illumination light. Even when a small light source is used as compared with the light source 110, the brightness equal to or higher than that can be obtained, and the lighting device 100 can be reduced in size and power consumption.

However, in the configuration described in Patent Document 2, the light incident on the auxiliary reflector 136 among the light generated by the light source 110 and the light reflected by the reflector 120 is used as illumination light, but the glare. Since the light incident on the main body 135 of the cut cap 130 is not yet used as illumination light, not all of the light generated by the light source can be used effectively.

Further, in the configuration of the lighting fixture 100 described in Patent Document 2, when the lighting fixture attached to the ceiling or the like is looked up from the room when the light is turned off, the glare cut cap enters the field of view, so that the presence of the lighting fixture stands out. It looks bad.

Note that the bulb cap described in Patent Document 3 is configured to cover the entire light source including the outer periphery of the light emitting point, and the front end portion of the light source 110 does not block the light incident on the reflector 120. It is different from the glare cut cap that is attached so as to cover only.

And in the lighting fixture provided with the bulb cap of patent document 3 which covers the whole light source, after diffusing all the light emitted toward the reflector from the light source by the diffusion step provided in the side of the bulb cap, Furthermore, since it is controlled by the reflector, it is necessary to match the outer shape of the valve cap with the surface pattern formed on the reflector (Claim 1 of Patent Document 3). Since lighting can be realized, it is necessary to perform a dedicated design in association with each other, the structure is complicated, and there is no versatility.

Accordingly, the present invention has been made to solve the above-described drawbacks of the prior art, and prevents direct light from an uncontrolled light source from being used as illumination light, as well as generation of unpleasant glare, etc. Can be effectively used as illumination light without wasting it, and as a result, it is possible to reduce the size and power consumption of the luminaire and look up from the room. In this case, the purpose of the present invention is to provide a glare cut cap that is not conspicuous in the presence of a glare cut cap or a light source, and therefore is easily blended into an indoor landscape and excellent in design, and a lighting apparatus including the glare cut cap. .

Hereinafter, means for solving the problem will be described together with reference numerals used in the embodiment for carrying out the invention. This symbol is intended to clarify the correspondence between the description of the claims and the description of the mode for carrying out the invention. Needless to say, it is used for the interpretation of the technical scope of the claims of the present invention. It is not used restrictively.

In order to achieve the above object, the glare cut cap 30 of the present invention comprises:
In the luminaire 1 including the light source 10 and the reflector 20 that reflects the light generated by the light source 10 and irradiates it in the direction of the opening 44 of the casing 40 (hereinafter referred to as “front”) in the casing 40. An opening 31 for receiving the distal end of the light source 10, a trunk 32 covering the outer periphery of the distal end of the light source 10, and a head 33 for closing the trunk 32 at the end opposite to the opening 31 are provided. , Formed of translucent material,
The opening edge 31a of the opening 31 is linearly continuous from the inner surface upper end β of the cone 50 provided at the opening end 43 of the casing 40 to a line in contact with the light emitting part α of the light source 10 (tangent to the light emitting part α). Covering the tip of the light source 10 so as to be located on the line γ,
The lens is formed in a shape that functions as a lens or a prism that is controlled by diffusing, converging, scattering, and / or refracting light incident on the inside from the opening 31 side in a predetermined state. (Claim 1).

The glare cut cap 30 can provide a function as the lens or prism by changing the thickness between the inner and outer peripheral surfaces in a predetermined pattern (Claim 2). By forming irregularities on the outer peripheral surface, the function as the lens or the prism can be given (claim 3).

Further, the body portion 32 of the glare cut cap 30 is formed in a shape that narrows the width at a predetermined inclination angle θ toward the head portion 33 side, and on or near the extension of the outer peripheral surface of the body portion 32. The reflector 20 is used by being attached to the tip of the light source 10 so that the focal point F of the reflector 20 is located.

The head 33 may have a thickness that increases from the center toward the outer periphery (Claim 5) or decreases from the center toward the outer periphery (Claim 6).

Furthermore, the head 33 may be formed in a semicircular arc shape that bulges outward (Claim 7).

Further, the glare cut cap 30 is formed with a ridge 34 that continuously bulges in the axial direction on the outer peripheral surface of the body portion 32.
A stepped step 35 may be formed on the inner peripheral surface of the body 32, and a ridge line of the step 35 may be formed in a curved line to continuously form a concavo-convex lens-shaped transmission surface in the circumferential direction (claims). Item 8).

In this case, the head 33 is formed in a semicircular arc shape that bulges outward, and the radius r of the arc of the inner wall surface of the head 33 is shorter than the radius R of the arc of the outer wall, and The center cr of the arc of the inner wall surface is preferably provided closer to the head 33 than the center CR of the arc of the outer wall surface (Claim 9).

In addition, the lighting fixture 1 of the present invention includes a light source 10 and a reflector 20 that reflects light emitted from the light source 10 and irradiates the light forward. 30 is attached (claim 10).

In the lighting fixture 1 having the above-described configuration, the glare cut cap 30 is attached to the tip of the light source 10 by adhering the glare cut cap 30 to the center of a disk (not shown) made of a translucent material such as glass or acrylic. Alternatively, the glare cut cap 30 may be integrally formed at the center of the disc of the translucent material, and the disc may be fixed in the casing 40 (claim 11). ).

Instead of mounting the translucent material with a disk (not shown), the glare cut cap 30 is mounted on the tip of the light source 10 by placing the periphery of the head 33 of the glare cut cap 30 or the trunk. 32, an annular portion 61 that fits 32, a fixed claw 62 that rises from the outer peripheral edge of the annular portion 61, and locks the opening edge 31 a of the glare cut cap 30 at the tip, and an outer peripheral edge of the annular portion 61. An attachment jig 60 having support legs 63 protruding in the outer peripheral direction is attached to the glare cut cap 30, and the support legs 63 of the attachment jig 60 attached to the glare cut cap 30 are placed at predetermined positions in the casing. It is good also as what is performed by fixing to (claim 12).

When the glare cut cap 30 is mounted by the mounting jig 60 configured as described above, an insertion portion 51 having a male screw 52 formed on the outer periphery is formed at the upper end portion of the cone 50, and the opening of the casing 40 is formed. A large-diameter portion 45 having an inner diameter larger than that of the other portion and a step portion 46 defining the large-diameter portion 45 are formed in the inner portion of the large-diameter portion 45. Forming a female screw 47 to be engaged with the male screw 52 formed on the outer periphery;
The tip of the support leg 63 of the mounting jig 60 is directly or other member between the tip of the insertion portion 51 inserted and screwed into the large diameter portion 45 and the stepped portion 46. It is good also as what can be pinched | interposed through (Claim 13).

In this case, a positioning groove 48 for receiving the tip end portion of the support leg 63 of the mounting jig 60 may be further provided on the inner peripheral surface of the large diameter portion 45. .

With the configuration of the present invention described above, the lighting device 1 provided with the glare cut cap 30 of the present invention was able to obtain the remarkable effects described below.

Direct light from a light source that cannot be controlled by the reflector 20 enters the glare cut cap 30 having a lens or prism function, and direct light from the light source 10 is controlled to a desired state by the glare cut cap 30. Therefore, the light emitted from the light source 10 can be used without waste, and the brightness can be greatly improved as compared with the conventional lighting apparatus using the light-shielding glare cut cap.

As a result, in order to obtain the same level of brightness, it is possible to use the light source 10 having a lower wattage than conventional lighting fixtures, and the size of the lighting fixture 1 can be reduced as the light source 10 becomes smaller. In addition, the lighting apparatus 1 with low power consumption can be provided.

The desired lens or prism function for the glare cut cap 30 is to change the thickness between the inner and outer peripheral surfaces in a predetermined pattern, to form irregularities on the inner and / or outer peripheral surface, The thickness of the head 33 is decreased or increased from the center toward the outer peripheral side, or the head is swelled in a semicircular arc shape toward the outside, and a combination thereof is relatively easily applied. I was able to.

Convex ridges 34 continuously bulging in the axial direction are formed on the outer peripheral surface of the barrel portion 32 of the glare cut cap 30, and a stepped step 35 is formed on the inner peripheral surface of the barrel portion 32. In the configuration in which the ridge line is formed in a curved line and the concavo-convex lens-shaped transmission surface is continuously formed in the circumferential direction, the light transmitted through the body 32 of the glare cut cap 30 can be diffused, and the head The portion 33 is formed in a semicircular arc shape that bulges outward, and the radius r of the arc of the inner wall surface of the head 33 is shorter than the radius R of the arc of the outer wall surface. In the configuration in which the arc center cr is provided closer to the head 33 with respect to the arc center CR of the outer wall surface, the light transmitted through the head 33 of the glare cut cap 30 can also be diffused. Lighting is performed without causing uneven lighting. The entire range could be uniformly bright.

In addition, since the light transmitted through the glare cut cap 30 can be uniformly diffused in this way, the existing glare cut cap provided in the lighting fixture 1 is attached to the glare cut cap of the present invention. Even in the case of replacement, it was possible to improve the brightness of the entire illumination range uniformly, and to provide a glare cut cap having versatility.

In the lighting fixture 1 in which the glare cut cap 30 is attached by the mounting jig 60 including the annular portion 61, the fixing claw 62, and the support leg 63 described above, the glare cut cap 30 can be easily placed at a predetermined position. In addition to being able to be mounted accurately, the reflected light of the reflector 20 blocked by the mounting jig 60 can be minimized, and the occurrence of uneven illumination can be prevented.

In particular, the structure is such that the tip of the support leg 63 can be sandwiched between the tip of the insertion portion 51 provided in the cone 50 and the stepped portion 46 provided in the casing 40, and further on the inner peripheral surface of the large-diameter portion 45. In the configuration in which the positioning groove 48 for receiving the distal end portion of the support leg 63 is provided, it is much easier to attach the glare cut cap 30 at an accurate position.

The schematic sectional drawing of the lighting fixture provided with the glare cut cap of this invention. It is explanatory drawing which showed the change of the thickness of a glare cut cap, and the change of the refractive state of transmitted light, (A)-(D) are the changes of the refractive state accompanying the thickness change of a head, (E), ( F) shows the change in the refraction state accompanying the change in the thickness of the body. Sectional drawing of the glare cut cap of the state with which the light source was mounted | worn. The perspective view of a glare cut cap. Bottom view of glare cut cap. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. Explanatory drawing which shows the example of a formation pattern of a protruding item | line (concave groove). The enlarged view of the arrow VIII part in FIG. It is explanatory drawing which shows the incident position of light with respect to the trunk | drum inner wall of a glare cut cap, the refraction | bending of a transmitted light, and a diffused body, (A), (D) is a taper part, (B), (E) is a recessed part, ( C) and (F) are in a state of being incident on the convex portion. It is explanatory drawing of an attachment jig, (A) is a perspective view of the state attached to the glare cut cap, (B) is a top view, (C) is CC sectional view taken on the line of (B). The principal part sectional drawing of the lighting fixture which shows the attachment state of the glare cut cap by an attachment jig. The bottom view of the state which removed the cone and the glass plate from the lighting fixture shown in FIG. Explanatory drawing of the conventional lighting fixture (corresponding to FIG. 1 of Patent Document 1). Explanatory drawing of the conventional lighting fixture (corresponding to FIG. 4 of Patent Document 2).

Hereinafter, the lighting fixture 1 provided with the glare cut cap 30 of the present invention will be described with reference to the accompanying drawings.

[Overall structure of lighting equipment]
In FIG. 1, reference numeral 1 denotes a lighting fixture 1 to which the glare cut cap 30 of the present invention is attached. In this embodiment, the lighting fixture 1 is embedded in an opening formed in the ceiling as an example. An example configured as a downlight to be used will be described.

However, the lighting fixture 1 to which the glare cut cap 30 of the present invention can be attached is not limited to the downlight described below, and can be applied to various lighting fixtures.

In the illustrated embodiment, the luminaire 1 includes a bottomed cylindrical casing 40 whose one end is closed by an end plate 41, and a HID, LED is mounted on a socket 42 attached to the end plate 41 in the casing 40. The light source 10 such as a halogen lamp can be attached to a predetermined position in the casing 40 by attaching the light source 10.

A reflector 20 having a light source insertion hole 22 formed in the center in the opposite direction of the opening end 43 is fitted into the opening end 43 located at the periphery of the opening 44 of the casing 40, and the light source insertion hole 22 of the reflector 20 is fitted. Further, the light source 10 is protruded into the reflector 20, and at least a portion of the light source 10 in front of the light emitting point 11 is arranged in the reflector 20.

A glare cut cap 30 is attached to the tip of the light source 10 arranged in the reflector 20 in this way, so that direct light from the light source 10 is not emitted as illumination light as it is. , The same configuration as that of the conventional lighting apparatus described with reference to FIG.

However, in contrast to the conventional lighting fixture in which the glare cut cap is made of a light-shielding material such as metal, in the lighting fixture 1 of the present invention, the glare cut cap 30 is made transparent. When the glare cut cap 30 is designed so that the outer shape or surface shape of the glare cut cap 30 functions as a lens or a prism, the direct light from the light source 10 passes through the glare cut cap 30. In addition, the transmitted light controlled by the glare cut cap can be used for illumination by diffusing, focusing, scattering and / or refracting to a desired state.

In the embodiment shown in FIG. 1, a cone 50 formed in a substantially truncated cone shape is provided at the opening end 43 of the casing 40 so as to extend it.

By providing the cone 50 in this way and attaching it so that the lower end edge of the cone 50 is fitted to the opening edge formed on the ceiling or the like (not shown), when looking up the lighting fixture from the room when the light is extinguished, glare cut The cap 30, the light source 10, and the reflector 20 do not easily enter the field of view from the indoor side, and can be installed on the ceiling or the like without a sense of incongruity.

[Glare cut cap]
The aforementioned glare cut cap 30 provided in the lighting fixture 1 of the present invention is formed of a light transmissive material such as glass, translucent ceramics, or resin, and light incident on the glare cut cap 30 is provided. Can be transmitted.

Such translucency is not limited to a case where it is obtained by a transparent material, for example, and may be formed translucently by a milk white material. Accordingly, colored transparent materials with various colorings may be used.

The glare cut cap 30 of the present application receives the direct light from the light source 10, while the light from the light source 10 is directed to the tip of the light source 10 so as not to block the light toward the reflector 20. Used only for mounting.

Thus, in order to enable attachment to the front end portion of the light source, the glare cut cap 30 of the present invention includes an opening 31 that receives the front end portion of the light source 10 and a body portion 32 that covers the outer periphery of the front end portion of the light source 10. And a head 33 that closes the body 32 at the end opposite to the opening 31 is formed in a cap shape as a whole.

As shown in FIG. 1, the glare cut cap 30 can reliably receive direct light from the light source 10 that cannot be controlled by the reflector 20 and direct light from the light emitting portion α of the light source 10 to the inner surface of the cone 50. , A line γ linearly continuous from the opening edge 31a of the opening 30 to the tangent line of the light emitting part α, that is, a line γ connecting the inner surface upper end β of the cone 50 so as to contact the light emitting part α of the light source 10. It is used by being attached to the tip of the light source 10 so that the edge 31a is arranged.

By disposing the opening edge 31a of the glare cut cap 30 on such a line γ, light from the light source 10 that does not irradiate the reflecting surface of the reflector 20 is incident on the glare cut cap 30. , Diffusion, focusing, scattering, and / or refraction by the glare cut cap 30 is received.

The glare cut cap 30 is formed in a truncated cone shape that narrows the width of the body 32 from the opening 31 side toward the head 33 by an angle θ (θ = 30 ° in the illustrated example). When the light source 10 is attached to the front end portion, it is preferably attached so that the focal point F of the reflector 20 is arranged on the extension of the outer peripheral surface of the body portion 32 or in the vicinity thereof.

With this configuration, the light reflected by the reflector 20 can be prevented from entering the outer peripheral surface of the body portion 32 of the glare cut cap 30, and the outer peripheral surface of the body portion 32 of the glare cut cap 30. This prevents the occurrence of uncontrollable light caused by unpredictable light diffusion that can occur when light is incident on the light source.

In addition, it is preferable that the head 33 of the glare cut cap 30 is disposed above the lower end edge 24 of the reflector 20 when the light source 10 is attached to the distal end portion. Thus, even when various lenses, filters, or the like are attached to the lower edge 24 of the reflector 20, the presence of the glare cut cap 30 does not get in the way.

The glare cut cap 30 having the basic shape described above is further designed to have a shape corresponding to the purpose, as will be described below, whereby desired diffusion, focusing, scattering, and / or light is transmitted to the transmitted light. A function is given as a lens or prism that gives refraction.

Note that what control is performed on the light passing through the glare cut cap 30 can be appropriately determined according to the purpose of illumination.

In order to give the above-described function to the glare cut cap 30, the thickness between the inner and outer peripheral surfaces of the glare cut cap 30 can be increased or decreased in a predetermined direction.

Among such thickness changes, the change in the thickness of the head 33 of the glare cut cap 30 and the change in the refraction pattern are shown in FIGS. 2 (A) to 2 (D). These changes are shown in FIGS. 2E and 2F, respectively.

As for the thickness of the head 33, as shown in FIGS. 2B and 2D, by increasing the thickness from the center toward the outer periphery, the light incident on the head spreads outward. The light that has passed through the head can be diffused by bending, and conversely, as shown in FIGS. 2A and 2C, the thickness of the head 33 is increased from the center toward the outside. By changing so as to decrease, it is possible to suppress the diffusion of the light incident on the head 33 and control it to parallel light, or to control inward focusing.

Further, the head 33 of the glare cut cap 30 may have a shape that bulges outward in a semicircular shape as shown in FIG. 6. In this case, the thickness of the head 33 may be constant, As shown as a modified example in FIG. 6, the radius r of the arc of the inner wall surface of the head 33 is shorter than the radius R of the arc of the outer wall surface, and the center cr of the arc of the inner wall surface is It may be provided near the head 33 with respect to the center CR of the arc of the outer wall surface. In this case, the inner and outer peripheral surfaces of the head 33 draw a curved line, and the outer peripheral side from the center of the head 33 is drawn. Since the change of increasing the wall thickness is shown, the transmitted light can be diffused at a wider angle.

Further, regarding the change in the thickness of the trunk portion 32, in the configuration in which the thickness is increased from the opening 31 side toward the head portion 33 side (see FIG. 2E), the light incident on the inner wall of the trunk portion 32 is increased. In contrast to this, in the structure in which the thickness is reduced from the opening 31 side toward the head 33 side (see FIG. 2F), the light incident on the inner wall of the body portion 32 is diffused. It becomes possible to make it.

As described above, in the example shown in FIGS. 2A to 2F, the light convergence is achieved by forming the thickness between the inner and outer peripheral surfaces of the glare cut cap 30 to be thicker or thinner in a predetermined direction. Or although the point at which diffusion control is possible has been described, the light passing through the glare cut cap 30 may be controlled by forming irregularities on the inner or outer peripheral surface.

As an example of such a configuration, in the embodiment shown in FIGS. 3 to 6, the ridge 34 and the step 35 are formed on the inner and outer peripheral surfaces of the glare cut cap 30. However, the irregularities formed on the inner and outer peripheral surfaces of the glare cut cap 30 are not only due to the formation of the ridges 34 (concave grooves) or steps 35, but also the formation of irregularities by frosting, embossing, engraving, etc. , V-groove, square groove, sphere, curved lens, fisheye lens, etc.

In the present embodiment, a ridge 34 whose longitudinal direction is the axial direction of the glare cut cap 30 with respect to the outer peripheral surface of the barrel portion 32 is provided, and a step 35 (cylindrical) is provided on the inner peripheral surface of the barrel portion 32 in the circumferential direction of the glare cut cap. However, the uneven pattern formed on the glare cut cap 30 is not limited to this configuration, and an axial ridge is formed on the inner peripheral surface and a continuous step in the circumferential direction is formed on the outer peripheral surface. The configuration is not limited to the illustrated example.

Further, the shape of the ridge (concave groove) and the step can be selected from various shapes depending on how the light is controlled. Examples of selectable shapes are shown in FIGS. F).

In the embodiment shown in FIGS. 3 to 6, a stepped step 35 is formed on the inner peripheral surface of the glare cut cap 30 as shown in the enlarged view of FIG. In a configuration in which the curved surface is formed with a wavefront-like concave / convex lens-like transmission surface continuously in the circumferential direction, the transmitted light is diffused in different states depending on which position of the concave / convex light is incident. , Focused and refracted.

That is, of the light irradiated downward with respect to the line L connecting the light emitting point 11 of the light source 10 and the peripheral portion 21 of the effective reflection surface of the reflector 20, the inner peripheral surface of the trunk portion 32 of the glare cut cap 30. The light incident on the tapered surface 35a is refracted so that the inclination angle becomes gentle as shown in FIGS. 9A and 9D, and is also incident on the concave portion 35b on the inner peripheral surface of the body portion 32 of the glare cut cap 30. The incident light is gently diffused when passing through the glare cut cap 30 as shown in FIGS. 9B and 9E, and further incident on the convex portion 35c on the inner peripheral surface of the body portion 32 of the glare cut cap. As shown in FIGS. 9C and 9F, the light that has been converged once and then diffused greatly.

Therefore, in the glare cut cap 30 described with reference to FIGS. 3 to 9, the light transmitted through the glare cut cap 30 is used as illumination light after being diffused in a complex manner. Not only is it effectively used as illumination light, but it is also diffused over the entire area to be illuminated, so the brightness can be reduced simply by replacing it with a light-shielding glare cut cap provided in existing lighting fixtures, for example. Not only can it be increased, but it is also less likely to cause uneven illumination, such as occurs when the light-shielding glare cut cap is simply removed.

The tapered surface 35a described above has an inclination angle of 1 ° or more with respect to the central axis of the glare cut cap 30 so that the inner diameter of the glare cut cap 30 increases from the head 33 side toward the opening 31 side. Preferably, when forming the glare cut cap 30 with a mold, the mold can be easily pulled out.

[Glare cut cap mounting structure]
As described with reference to FIG. 1, the glare cut cap 30 configured as described above has the opening edge 31 a on the line γ connecting the inner surface upper end β of the cone 50 so as to be in contact with the light emitting portion α of the light source 10. It is attached in the state which coat | covered the front-end | tip part of the light source 10 so that may be located.

It is necessary to fix the glare cut cap 30 so as not to cause unevenness of light and to fix the control light from the reflector 20 without blocking as much as possible. Such a fixing method is an example. As described above, a glare cut cap 30 is bonded to the center of a disk (not shown) made of a light transmissive material such as glass or acrylic, and is fixed by other methods, or the glare cut cap 30 is fixed as described above. It may be formed by integrally molding with a disk of translucent material and fixing the above disk with the glare cut cap 30 in the casing 40 in this way, or metal, resin, or other necessary strength An attachment jig 60 made of a material including the material is provided, and the glare cut cap 30 is provided inside the casing 40 by the attachment jig 60. It may alternatively be attached to position.

In this embodiment, as an example, the glare cut cap 30 is attached using the attachment jig 60 shown in FIGS.

In the illustrated embodiment, the mounting jig 60 includes an annular portion 61 on which the periphery of the head 33 of the glare cut cap 30 is placed, and rises from the outer periphery of the annular portion 61 and at the tip of the glare cut cap 30. A fixing claw 62 that locks and fixes the opening edge 31 a and a support leg 63 that protrudes in the outer peripheral direction from the outer peripheral edge of the annular portion 61 and has a tip fixed to the opening 44 portion of the casing 40 are provided.

Such an attachment jig 60 is provided with the above-described annular portion 61 in the center by stamping and molding a metal plate having a required strength, and protrudes in the outer peripheral direction from the peripheral portion of the annular portion 61. A total of six belt-like bodies serving as the fixing claws 62 and the supporting legs 63 are formed at a predetermined interval, in this embodiment at an equal angle of 60 °, and three of them are provided every 120 °. Is raised along the body portion 32 of the glare cut cap 30 to form the above-mentioned fixed claw 62, and the remaining three are bent into a predetermined shape to form a support leg 63, and the tip of the support leg 63 is placed in the casing 40. The glare cut cap 30 can be attached to a predetermined position at the tip of the light source 10 by being fixed at the predetermined position.

However, the material of the mounting jig 60 is not limited to the metal described above, and may be manufactured from resin materials such as engineering plastics or other materials as long as they have necessary strength and heat resistance.

In the embodiment shown in FIG. 11, as an attachment method of the attachment jig 60 in the casing 40, an insertion portion 51 having a male screw 52 on the outer periphery is provided at the upper end portion of the cone 50, and the opening of the casing 40 is opened. A large diameter portion 45 having an inner shape larger than other portions and a step portion 46 that defines an end portion of the large diameter portion 45 are formed in the inner portion of the large diameter portion 45. A female screw 47 that engages with the male screw 52 formed on the outer periphery of the insertion portion 51 is formed, and the tip of the support leg 63 of the mounting jig 60 is engaged with the stepped portion 46 together with the glare cut cap 30. After the mounting jig 60 is inserted into the casing 40 and a glass plate, lens, filter, or the like is inserted into the large-diameter portion 45 as necessary (in the illustrated example, the glass plate 70 is inserted), The provided insertion portion 51 is By inserting and screwing into the diameter portion 45, the distal end portion of the support leg 63 can be sandwiched between the distal end of the insertion portion 51 and the stepped portion 46 through the glass plate 70 in the illustrated example. Thus, the glare cut cap 30 can be accurately and easily attached to a predetermined position.

In the present embodiment, as shown in FIG. 12, positioning grooves 48 are provided in the large-diameter portion 45 of the casing 40 at intervals of formation of the support legs 63, and in the present embodiment, at equal intervals of 120 °. The mounting jig 60 can be inserted into the large diameter portion of the casing 40 by fitting the tip of the support leg 63 into the positioning groove 48.

By attaching the glare cut cap 30 with the mounting jig 60 configured as described above, the glare cut cap 30 is attached relatively easily to an accurate position so as to cover a predetermined position of the tip of the light source 10. be able to.

In addition, although the light transmitted through the glare cut cap 30 is partially blocked by the annular portion 61 and the fixed claw 62, the annular portion 61 and the fixed claw 62 are formed narrow so that the light is transmitted by the mounting jig 60. The amount of light to be blocked can be made extremely small, and the presence of the mounting jig 60 does not cause uneven illumination.

In the illustrated embodiment, it has been described that the periphery of the head 33 of the glare cut cap 30 is placed on the annular portion 61 of the mounting jig 60. However, for example, it is provided in the center of the annular portion 61. It is good also as what attaches to the state which locked the opening edge 31a of the glare cut cap 30 by the fixing nail | claw 62 in the state which fitted the trunk | drum 32 of the glare cut cap in opening.

In the embodiment described with reference to FIG. 11, the mounting jig 60 is supported between the stepped portion 46 formed on the inner periphery of the casing 40 and the distal end of the insertion portion 51 formed on the upper end of the cone 50. Although it has been described that the glare cut cap 30 is fixed at a predetermined position in the casing 40 by sandwiching the tip portion of the leg 63, the fixing method of the mounting jig 60 in the casing 40 is limited to the above example. For example, various modifications such as forming the lower end portion of the casing 40 to be receivable on the upper end side of the cone 50 are possible.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 10 Light source 11 Light-emitting point 20 Reflector 21 Peripheral part of effective reflection surface 22 Light source insertion hole 23 Flange 24 Lower end edge 30 Glare cut cap 31 Opening part 31a Opening edge 32 Trunk part 33 Head part 34 Projection 35 Step 35a Tapered surface 35b Concave part 35c Convex part 40 Casing 41 End plate 42 Socket 43 Opening end 44 Opening (of the casing 40)
45 Large diameter portion 46 Step portion 47 Female screw 48 Positioning groove 50 Cone 51 Insertion portion 52 Male screw 60 Mounting jig 61 Annular portion 62 Fixing claw 63 Support leg 70 Glass plate 100 Lighting fixture 110 Light source 120 Reflector 130 Glare cut cap 135 Main body (For glare cut cap)
136 Auxiliary reflector 136a Auxiliary reflector
α light emitting part β inner surface upper end γ line of cone 50; line L line continuous from tangent to light emitting part α from opening edge 31a; line connecting light emitting point 11 and peripheral part 21 of effective reflecting surface of reflector 20 F focus of reflector

Claims

In a luminaire including a light source and a reflector that reflects light emitted from the light source and irradiates the light forward, an opening that receives the tip of the light source, a body that covers an outer periphery of the tip of the light source, and the opening Formed of a translucent material with a head that closes the body at the end opposite to the part,
Covering the tip of the light source so that the opening edge of the opening is located on the tangent to the light emitting part of the light source from the upper end of the inner surface of the cone provided at the opening end of the casing;
A glare cut cap formed into a lens or a prism shape which is controlled by diffusing, focusing, scattering and / or refracting light incident on the inside from the opening side in a predetermined state.
2. The glare cut cap according to claim 1, wherein a function as the lens or the prism is provided by changing a wall thickness between the inner and outer peripheral surfaces in a predetermined pattern.
The glare cut cap according to claim 1 or 2, wherein a function as the lens or the prism is provided by forming irregularities on the inner peripheral surface and / or the outer peripheral surface.
The body is formed in a shape that narrows the width toward the head at a predetermined inclination angle, and the reflector is positioned so that the focal point of the reflector is positioned on or near the extension of the outer surface of the body. The glare cut cap according to any one of claims 1 to 3, wherein the glare cut cap is used by being attached to a tip end portion.
The glare cut cap according to any one of claims 1 to 4, wherein the thickness of the head is increased from the center toward the outer peripheral side.
The glare cut cap according to any one of claims 1 to 4, wherein the thickness of the head is decreased from the center toward the outer peripheral side.
The glare cut cap according to any one of claims 1 to 6, wherein the head is formed in a semicircular arc shape that bulges outward.
Forming a ridge that continuously bulges in the axial direction on the outer peripheral surface of the trunk,
A stepped step is formed on the inner peripheral surface of the body, and a ridge line of the step is formed in a curve to continuously form a concave lens-shaped transmission surface in the circumferential direction. The glare-cut cap according to any one of 7 above.
The head is formed in a semicircular arc shape bulging outward, the radius of the arc of the inner wall surface of the head is shorter than the radius of the arc of the outer wall surface, and the arc of the inner wall surface 9. The glare cut cap according to claim 8, wherein a center is provided closer to the head with respect to a center of an arc of the outer wall surface.
A glare cut cap according to any one of claims 1 to 9, comprising a light source and a reflector for reflecting the light generated by the light source and irradiating the light forward. lighting equipment.
The glare cut cap is fixed to the center of the disc of the translucent material, or the glare cut cap is integrally formed at the center of the disc of the translucent material, and the disc is fixed in the casing. The lighting fixture according to claim 10, wherein the glare cut cap is attached to a tip portion of a light source.
The peripheral edge of the head portion of the glare cut cap is placed, or an annular portion that fits the body portion, and rises from the outer peripheral edge of the annular portion, and the opening edge of the glare cut cap is locked at the tip portion. A mounting jig having a fixing claw and a supporting leg protruding in an outer peripheral direction from an outer peripheral edge of the annular portion is attached to the glare cut cap,
11. The glare cut cap is attached to the tip of the light source by fixing the support leg of the mounting jig attached to the glare cut cap at a predetermined position in the casing. Lighting fixtures.
An insertion part having a male screw formed on the outer periphery is formed at the upper end of the cone, and a large-diameter part having a larger inner diameter than the other part and the large-diameter part are defined in the opening of the casing. Forming a stepped portion and forming a female screw to be screwed with a male screw formed on the outer periphery of the insertion portion on the inner periphery of the large diameter portion;
The tip end portion of the support leg of the mounting jig can be clamped between the step portion and the tip end of the insertion portion that is inserted and screwed into the large diameter portion. lighting equipment.
14. The luminaire according to claim 13, wherein a positioning groove is provided on the inner peripheral surface of the large-diameter portion to receive the tip end portion of the support leg of the mounting jig.