JP2019145303A - Light fitting - Google Patents

Abstract

To provide a light fitting including a falling prevention part which unfailingly prevents falling of an outer cover while securing flexibility of a shape of the outer cover.SOLUTION: A light fitting includes: a light source which radiates light; a light source cover provided at the radiation side of the light source; a case which holds the light source and the light source cover; an outer cover having an attachment part attached to an inner wall of the case, an outer shell part connected to the attachment part and having a diameter larger than the attachment part, and a step part formed between the attachment part and the outer shell part; and a falling prevention part which is attached to the case and has a tip part facing the step part.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a lighting fixture including a fall prevention unit that prevents the outer cover from falling.

  2. Description of the Related Art Conventionally, a lighting fixture including a fall prevention unit that prevents the outer cover from falling is known. Patent Document 1 discloses a lighting fixture that prevents a glass globe from falling by hooking a glass globe that covers a lamp with a fall-preventing member formed of a hook-shaped fixing bracket or the like. In Patent Document 1, a concave portion is formed in the glass globe in order to hook the fall prevention member on the glass globe.

JP-A-8-102207

  However, the lighting fixture disclosed in Patent Document 1 requires manufacturing costs because it is necessary to form a recess in the glass globe.

  The present invention has been made to solve the above-described problems, and provides a lighting apparatus including a fall prevention unit that reliably prevents the outer cover from falling while ensuring the degree of freedom of the shape of the outer cover. Is.

  The luminaire according to the present invention includes a light source for irradiating light; a light source cover provided on an irradiation side of the light source; a case for holding the light source and the light source cover; an attachment portion attached to an inner wall of the case; An outer cover having a diameter larger than that of the mounting portion, and an outer cover having a step portion formed between the mounting portion and the outer portion; a fall prevention portion attached to the case and having a tip portion facing the step portion; Is provided.

  According to the present invention, the stepped portion of the outer cover is caught by the fall preventing portion, thereby preventing the outer cover from falling. For this reason, it is not necessary to form a recess in the outer cover. Therefore, it is possible to reliably prevent the outer cover from falling while ensuring the degree of freedom of the shape of the outer cover.

It is an assembly perspective view which shows the lighting fixture 1 which concerns on Embodiment 1 of this invention. It is a side view which shows the lighting fixture 1 which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the lighting fixture 1 which concerns on Embodiment 1 of this invention. It is the further disassembled perspective view which shows the lighting fixture 1 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the outer side cover 3 which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the state by which the outer side cover 3 was removed in the lighting fixture 1 which concerns on Embodiment 1 of this invention. It is the further disassembled perspective view which shows the lighting fixture 1 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the state where the outer side cover 3 was removed in the lighting fixture 1 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the lighting fixture 1 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the lighting fixture 1 which concerns on Embodiment 1 of this invention. It is a side view which shows the fall prevention part 6 which concerns on Embodiment 1 of this invention. FIG. 3 is a first diagram illustrating a mode in which the fall prevention unit 6 prevents the outer cover 3 from dropping in Embodiment 1 of the present invention. It is a 2nd figure which shows the aspect in which the fall prevention part 6 prevents the fall of the outer side cover 3 in Embodiment 1 of this invention. It is a 3rd figure which shows the aspect in which the fall prevention part 6 prevents the fall of the outer side cover 3 in Embodiment 1 of this invention.

Embodiment 1 FIG.
Hereinafter, embodiments of a lighting apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is an assembled perspective view showing a lighting fixture 1 according to Embodiment 1 of the present invention, and FIG. 2 is a side view showing the lighting fixture 1 according to Embodiment 1 of the present invention. FIG. 3 is an exploded perspective view showing the lighting fixture 1 according to Embodiment 1 of the present invention, and FIG. 4 is a further exploded perspective view showing the lighting fixture 1 according to Embodiment 1 of the present invention. As shown in FIGS. 1 to 4, the luminaire 1 includes a case 2 attached to a surface to be attached such as a ceiling, an outer cover 3 attached to the case 2, a reflection plate 4, an internal component member 5, and a fall. The prevention part 6 is provided.

  The case 2 is made of, for example, resin or aluminum die casting, and has a bottomed cylindrical shape extending from the bottom surface 25 on the mounting surface side. On the inner wall of the case 2, a female screw 21 that is screwed with the outer cover 3 is formed. In the center of the case 2, a first column 22 is provided that has a cylindrical shape protruding from the bottom surface 25 to the irradiation side and supports the light source module 51 of the internal component 5. On the side surface of the first support column 22, there is provided a second support column 23 in which a screw hole into which a screw for fixing the holding plate 51c of the light source module 51 is screwed is formed. The second support column 23 has a rib function that reinforces the first support column 22. The outer edge of the case 2 is provided with two third columns 24 having screw holes into which screws for fixing the reflecting plate 4 are screwed. The outer diameter of the case 2 is determined by the arrangement of the light source module 51, the power source 52, the battery 53, the emergency lighting device 54, the power terminal block 55, and the like, which are main components housed inside.

  FIG. 5 is a cross-sectional view showing the outer cover 3 according to Embodiment 1 of the present invention. As shown in FIG. 5, the outer cover 3 is made of, for example, glass and has a bottomed cylindrical shape. The outer cover 3 is milky white and has diffusibility. The outer cover 3 has an attachment portion 32 attached to the inner side wall of the case 2 and an outer portion 31 connected to the attachment portion 32. On the outer wall of the attachment portion 32, a male screw 33 that is screwed into the case 2 is formed. The inner wall of the mounting portion 32 gradually increases in thickness and decreases in inner diameter from the case 2 side toward the outer shell portion 31. The outer shell 31 faces the floor, for example. The outer shell 31 has a larger diameter than the mounting portion 32. The step portion 35 is formed between the attachment portion 32 and the outer portion 31. That is, a step 35 is formed between the inner wall of the attachment portion 32 and the inner wall of the outer shell 31.

  The outer cover 3 is fixed to the case 2 by the male screw 33 of the outer cover 3 being screwed into the female screw 21 of the case 2. A ring-shaped cover packing 34 is attached to a place where the male screw 33 of the outer cover 3 is formed. The cover packing 34 is, for example, an O-ring, and prevents water or dust from entering the inside of the case 2 and the outer cover 3. The outer diameter of the outer cover 3 is about 280 mm, and is appropriately determined according to the outer diameter of the case 2.

  The height d2 which is the length of the mounting portion 32 in the optical axis direction is a value obtained by adding the height of the portion sandwiching the cover packing 34 to the height of the male screw 33 screwed into the case 2. Further, the height of the outer shell 31 is determined based on the amount of light distributed to the outer shell 31 side. The height of the outer cover 3 is the sum of the height d2 of the mounting portion 32 and the height of the outer shell portion 31. Further, the length d1 of the step portion 35 corresponds to a length that is expanded from the attachment portion 32 to the outer portion 31.

  The reflection plate 4 is made of, for example, a sheet metal and has a disk shape. A hole 41 into which the light source module 51 of the internal component 5 is inserted is formed in the center of the reflection plate 4. In the peripheral portion of the reflector 4, two holes 42 screwed to the third column 24, a hole 43 into which the inspection switch 57 of the internal component 5 is inserted, and an inspection monitor 56 of the internal component 5 A display window 44 and a notch 45 into which the fall prevention unit 6 is inserted are formed.

  6 is an exploded perspective view showing a state where the outer cover 3 is removed in the lighting fixture 1 according to Embodiment 1 of the present invention, and FIG. 7 is an exploded perspective view further disassembled than FIG. . FIG. 8 is a cross-sectional view showing a state where the outer cover 3 is removed from the lighting fixture 1 according to Embodiment 1 of the present invention. 8 is a cross-sectional view taken along the line AA in FIG. As shown in FIGS. 6 to 8, the internal component 5 includes a light source module 51, a power source 52, a battery 53, an emergency lighting device 54, a power terminal block 55, an inspection monitor 56, and an inspection switch 57.

  The light source module 51 includes a light source 51a, a socket 51b, a pressing plate 51c, and a light source cover 51d. The light source 51a is made of, for example, a COB (Chip On Board) LED, and has a light distribution with a large amount of light irradiated in the front direction, which is the direction of the outer portion 31 of the outer cover 3 facing the light source 51a. A plurality of light sources 51a arranged on a substrate may be used. The socket 51b is made of, for example, resin, holds the light source 51a, and dissipates heat generated from the light source 51a. The socket 51b is fixed to the holding plate 51c with a plurality of screws. The pressing plate 51c is made of, for example, aluminum, holds the light source 51a and the socket 51b, and dissipates heat generated from the light source 51a.

  The holding plate 51 c is fixed by inserting a screw into a screw hole formed in the second column 23 of the case 2. Note that the socket 51b and the pressing plate 51c that sandwich the light source 51a may be fastened to the first support column 22 by using screws that fix the socket 51b and the pressing plate 51c. Thus, the light source 51a is sandwiched between the socket 51b and the pressing plate 51c. The light source cover 51d is transparent and is provided on the irradiation side of the light source 51a. A screw is inserted into a screw hole formed in the second support column 23, and is fixed by tightening together with the pressing plate 51c. The light source module 51 is positioned at a position away from the bottom surface 25 of the case 2 toward the irradiation side by being held by the first support column 22. The light source module 51 is inserted into the hole 41 of the reflecting plate 4 and exposed to the outer cover 3 side.

  The power source 52 is held in the case 2 and supplies power supplied from an external commercial power source to the light source module 51. The battery 53 is held in the case 2 and is trickle-charged by the emergency lighting device 54 at normal times when power is supplied from an external commercial power source. The battery 53 supplies power to the light source module 51 via the emergency lighting device 54 in an emergency in which power supply from an external commercial power supply is stopped. Further, the battery 53 supplies power to the light source module 51 via the emergency lighting device 54 even when the lighting fixture 1 is inspected. The emergency lighting device 54 is held in the case 2 and trickle-charges the battery 53. The power supply terminal block 55 is held by the case 2 and has a plurality of terminals to which electric wires for supplying the power supply 52 from an external commercial power supply are connected.

  The inspection monitor 56 is held by the case 2 and can be viewed from the outer cover 3 side through the display window 44 of the reflector 4. The inspection monitor 56 has, for example, an LED. The LED of the inspection monitor 56 lights in green when the battery 53 is sufficiently charged. In the first embodiment, when power is supplied from an external commercial power supply for 48 hours or more, the battery 53 is sufficiently charged, and the LED of the inspection monitor 56 is lit. The LED of the inspection monitor 56 is not lit when the battery 53 is not sufficiently charged. Even when the battery 53 and the emergency lighting device 54 are not electrically connected, the LED of the inspection monitor 56 is not lit. Thereby, it can be recognized that the state of charge of the battery 53 and that the power cannot be supplied from the battery 53 to the light source module 51 can be recognized.

  The inspection switch 57 is held by the case 2 and is inserted into the hole 43 of the reflecting plate 4 so as to be exposed to the outer cover 3 side. When the inspector operates the inspection switch 57 at the time of inspection, DC power is supplied from the battery 53 to the light source module 51 via the emergency lighting device 54. The inspector can check the state of charge of the battery 53 based on the display state of the LED on the inspection monitor 56 when the inspection switch 57 is operated.

  The lighting fixture 1 of this Embodiment 1 can be set as the illumination always lighted at the normal time. An external switch may be provided in the middle of the wiring for supplying commercial power. In this case, when the external switch is turned on, the light source module 51 is lit, and when the external switch is turned off, the light source module 51 is not lit. Thus, by providing the external switch, it is possible to provide illumination that can be turned on when necessary, not always on.

  FIG. 9 is a cross-sectional view showing the lighting fixture 1 according to Embodiment 1 of the present invention. As shown in FIG. 9, the power terminal block 55 is placed on a terminal block fixing plate 55 a that is attached to the bottom surface 25 of the case 2 so as to be inclined. Since the power terminal block 55 is inclined with respect to the case 2, the operator can easily connect a commercial power line (not shown) to the power terminal block 55. A commercial power line (not shown) is drawn out of the case 2 through the opening 22 a inside the first support column 22. The power terminal block 55 may be disposed on the inclined surface by forming an inclined surface on the bottom surface 25 of the case 2. Thereby, the effect of workability improvement equivalent to the terminal block fixing plate 55a can be obtained while reducing the number of parts.

  FIG. 10 is a cross-sectional view showing the lighting fixture 1 according to Embodiment 1 of the present invention. 10 is a cross-sectional view taken along line BB in FIG. As shown in FIG. 10, the fall prevention unit 6 is attached to the outer edge portion of the bottom surface 25 of the case 2, and receives the outer cover 3 if the outer cover 3 is dropped from the case 2. The fall prevention part 6 is formed by bending, for example, a stainless steel wire, and has a wire diameter of 3 mm or more. In addition, when the wire diameter is smaller than 3 mm, there is a possibility that the fall prevention unit 6 may be bent and the outer cover 3 cannot be supported. In addition, when the wire diameter is extremely large, the shadow of the fall prevention unit 6 is reflected in the outer cover 3, so the wire diameter is preferably set to a predetermined value or less. The wire diameter of the fall prevention part 6 of this Embodiment 1 is 3.2 mm.

  FIG. 11 is a side view showing the fall prevention unit 6 according to Embodiment 1 of the present invention. As shown in FIG. 11, the fall prevention part 6 has an arm part 60 that extends from the bottom surface 25 of the case 2 toward the outer cover 3, a support arm 64, and a tip part 65. The arm part 60 has a base part 61, an inclined part 62, and a vertical part 63. The base 61 is attached to the bottom surface 25 of the case 2 and is bent in an Ω shape when viewed from the direction of the support arm 64. In the base 61, an Ω-shaped arc portion is fixed to the bottom surface 25 of the case 2 with a fixing screw (not shown). In FIG. 8, only the screw holes of the fixing screw are shown. Here, the base 61 of the fall prevention unit 6 may have a shape other than an Ω-shape, and may be securely fixed in order to suppress wobble. Moreover, the fall prevention part 6 may be fixed not with a fixing screw but with a clip or the like.

  The inclined portion 62 is connected to the base portion 61 and extends inclined from the base portion 61. The inclined portion 62 prevents the outer cover 3 from shaking due to the momentum of the drop when the outer cover 3 falls. The vertical portion 63 is connected to the inclined portion 62 and extends to the outer cover 3 side perpendicular to the bottom surface 25 of the case 2. The support arm 64 extends along the bottom surface 25 of the case 2. The support arm 64 is connected to the vertical portion 63 and extends in the horizontal direction and on the outer peripheral side of the outer cover 3. The support arm 64 is extended in the horizontal direction so as not to come in contact with a place other than the tip 65 of the fall prevention unit 6 when the outer cover 3 rotates after dropping. The support arm 64 extends parallel to the bottom surface 25 of the case 2 from the distal end portion 65. The length L2 of the support arm 64 is longer than the height d2 of the attachment portion 32. However, if the length L2 of the support arm 64 is excessively long, the step portion 35 may be detached from the tip portion 65 and the outer cover 3 may fall due to the outer cover 3 being shaken by the dropping force. For this reason, it is preferable that the length L2 of the support arm 64 is not too longer than the height d2 of the attachment portion 32. In the first embodiment, the length L2 of the support arm 64 is 5 mm longer than the height d2 of the attachment portion 32.

  The distal end portion 65 is connected to the support arm 64 and has a protruding shape for locking the step portion 35 and extends toward the bottom surface 25. The front end portion 65 is disposed so as to be positioned directly below the step portion 35 so as to face the step portion 35 of the outer cover 3, and has a hook shape. Thereby, even if the outer cover 3 falls, the stepped portion 35 of the outer cover 3 is caught by the tip portion 65. The length L1 of the distal end portion 65 is shorter than the length d1 of the step portion 35. When the length L1 of the distal end portion 65 is equal to or longer than the length d1 of the stepped portion 35, the distal end portion 65 is normally caught on the stepped portion 35 of the outer cover 3 and it becomes difficult to remove the outer cover 3. Therefore, the length L1 of the tip portion 65 is shorter than the length d1 of the step portion 35, so that the tip portion 65 is prevented from being caught by the step portion 35 at the normal time. However, if the length L1 of the distal end portion 65 is excessively short, the stepped portion 35 may fall out of the distal end portion 65 and fall. For this reason, it is preferable that the length L1 of the front-end | tip part 65 is not too short rather than the length d1 of the level | step-difference part 35. FIG. In the first embodiment, the length L1 of the distal end portion 65 is 3 mm shorter than the length d1 of the stepped portion 35.

  The lighting fixture 1 of this Embodiment 1 can be used as an emergency lighting fixture. The light source 51a can be used as an emergency light source. In this case, “Emergency Lighting Equipment Technical Standard (JIL5501-2009)” issued by the Japan Lighting Equipment 1 Industry Association, Appendix 8 “Technology related to emergency lighting equipment using LED light sources that conforms to Ministry of Construction Notification No. 1830” In accordance with the “standard”, it is necessary that the material of the light source cover 51d is a non-combustible material or a material conforming to JIS C 60695-2-11 (850 ° C.), and the material of the outer cover 3 is a non-combustible material such as glass.

  FIG. 12 is a first diagram illustrating a mode in which the fall prevention unit 6 prevents the outer cover 3 from dropping in the first embodiment of the present invention. FIG. 13 is a second diagram illustrating a mode in which the fall prevention unit 6 prevents the outer cover 3 from dropping in the first embodiment of the present invention. FIG. 14 is a third diagram illustrating a mode in which the fall prevention unit 6 prevents the outer cover 3 from dropping in the first embodiment of the present invention. Next, how the fall prevention unit 6 prevents the outer cover 3 from falling will be described. As shown in FIG. 12, when the outer cover 3 and the case 2 are loosened and the outer cover 3 falls from the case 2, the stepped portion 35 of the outer cover 3 is prevented from being dropped immediately below the stepped portion 35. It catches on the tip 65 of the part 6. FIG. 12 shows a state before the outer cover 3 rotates, and the rotation angle of the outer cover 3 is 0 degree.

  From this state, as shown in FIG. 13, the stepped portion 35 positioned diagonally of the stepped portion 35 that comes into contact with the distal end portion 65 moves downward due to the weight of the outer cover 3. Along with this, the outer cover 3 rotates around the portion where the stepped portion 35 and the tip portion 65 are in contact. FIG. 13 shows a mode in which the rotation angle of the outer cover 3 is 45 degrees. When the outer cover 3 rotates, as shown in FIG. 14, the mounting portion 32 of the outer cover 3 is accommodated in the storage space 66 surrounded by the tip portion 65, the support arm 64, and the vertical portion 63 of the fall prevention portion 6. Retained. FIG. 14 shows a mode in which the rotation angle of the outer cover 3 is 90 degrees. In the first embodiment, since the length L1 of the tip portion 65 is shorter than the length d1 of the step portion 35, the attachment portion 32 is not inhibited from being accommodated in the storage space 66. Further, since the length L <b> 2 of the support arm 64 is longer than the height d <b> 2 of the attachment portion 32, the attachment portion is allowed to be accommodated in the storage space 66.

  According to the first embodiment, the step portion 35 is formed on the outer cover 3. Then, the step portion 35 of the outer cover 3 is caught by the fall prevention portion 6, thereby preventing the outer cover 3 from falling. For this reason, it is not necessary to form a recess in the outer cover 3. Therefore, it is possible to reliably prevent the outer cover 3 from falling while ensuring the degree of freedom of the shape of the outer cover 3. In addition, the attachment portion 32 of the outer cover 3 is caught and rotated by the fall prevention portion 6, and is then accommodated and held in the accommodation space 66 formed by the fall prevention portion 6. Thus, the outer cover 3 caught on the fall prevention part 6 does not fall even after it rotates. Therefore, the first embodiment can reliably prevent the outer cover 3 from falling. Further, since the step portion 35 on which the tip 65 of the fall prevention unit 6 is hooked is formed on the outer cover 3, the outer cover 3 can be held even if the tip 65 of the fall prevention unit 6 is thin. Therefore, even if a heavy glass glove or the like is employed as the outer cover 3 as in the prior art, it is not necessary to make the fall prevention part 6 thick. Therefore, it is possible to suppress the shadow of the fall prevention unit 6 from appearing on the outer cover 3.

  Further, according to the first embodiment, the fall prevention part 6 has the tip part 65, and the outer cover 3 has the step part 35 on which the tip part 65 is caught, so that the fall prevention part 6 bends. However, the outer cover 3 can be held. Therefore, the fall prevention part 6 can be formed with one wire. Moreover, it is possible to further suppress the shadow of the fall prevention unit 6 from being reflected on the outer cover 3 by painting the fall prevention unit 6 with white.

  Further, according to the first embodiment, the fall prevention part 6 has the tip part 65, and the outer cover 3 has the step part 35 on which the tip part 65 is caught, so that the fall prevention part 6 is thickened. The outer cover 3 can be held without it. For this reason, even if the fall prevention part 6 is brought close to the inner surface of the outer cover 3, it is possible to suppress the shadow of the fall prevention part 6 from appearing on the outer cover 3. Therefore, the support arm portion 64 and the tip portion 65 can be separated from the opening end portion of the case 2, and the fall prevention portion 6 is prevented from interfering with the outer cover 3 when the outer cover 3 is attached to the case 2. Can do.

  Moreover, according to this Embodiment 1, since the fall prevention part 6 is comprised so that the shadow of the fall prevention part 6 may be reflected in the outer side cover 3, the fall prevention part 6 is in an irradiation range. A light source module 51 can be provided to enter. Thus, the light source module 51 can irradiate the side surface of the outer cover 3 by including the fall prevention unit 6 in the irradiation range, and can irradiate the entire outer cover 3.

  Further, according to the first embodiment, the reflector 4 is provided with the notch 45 so as not to interfere with the fall prevention unit 6. Here, since the fall prevention part 6 is formed with a wire, it is not necessary to enlarge the notch 45. Therefore, the influence on the performance of the reflecting plate 4 can be suppressed. In addition, by providing the notch 45, it is possible to suppress the load on the reflecting plate 4 when the fall prevention unit 6 holds the outer cover 3.

  The fall prevention unit 6 is exemplified for the case where the wire diameter of the stainless steel wire is 3 mm or more, but can be appropriately changed depending on the shape and weight of the outer cover 3.

  DESCRIPTION OF SYMBOLS 1 Lighting fixture, 2 Case, 3 Outer cover, 4 Reflecting plate, 5 Internal component, 6 Fall prevention part, 21 Female screw, 22 1st support | pillar, 22a opening, 23 2nd support | pillar, 24 3rd support | pillar, 25 bottom surface, 31 outer portion, 32 mounting portion, 33 male screw, 34 cover packing, 35 stepped portion, 41 hole, 42 hole, 43 hole, 44 display window, 45 notch, 51 light source module, 51a light source, 51b socket, 51c holding plate, 51d light source cover, 52 power source, 53 battery, 54 emergency lighting device, 55 power terminal block, 55a terminal block fixing plate, 56 inspection monitor, 57 inspection switch, 60 arm portion, 61 base portion, 62 inclined portion, 63 Vertical part, 64 Support arm, 65 Tip part, 66 Storage space.

Claims (5)

A light source that emits light;
A light source cover provided on the irradiation side of the light source;
A case for holding the light source and the light source cover;
An attaching portion attached to the inner wall of the case, an outer portion connected to the attaching portion and having a larger diameter than the attaching portion, and an outer cover having a step portion formed between the attaching portion and the outer portion;
A fall prevention part attached to the case and having a tip part facing the step part;
A lighting fixture comprising: The fall prevention part is
An arm portion extending from the bottom surface of the case toward the outer cover;
A support arm connected to the arm portion and extending along a bottom surface of the case;
The lighting fixture according to claim 1, wherein a length of the support arm is longer than a length of the attachment portion in an optical axis direction. The arm is
A base attached to the case;
An inclined portion connected to the base and extending obliquely from the base;
A vertical portion connected to the inclined portion and extending perpendicularly to the case toward the outer cover;
The lighting fixture according to claim 2, wherein a storage space in which the attachment portion is stored is formed by the vertical portion, the support arm, and the tip portion. The tip portion has a protruding shape for locking the stepped portion,
The lighting fixture according to claim 1, wherein a length of the tip portion is shorter than a length of the step portion. The lighting apparatus according to claim 1, wherein the fall prevention unit is made of a wire.

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