JP2019179637A - Lighting fixture - Google Patents

Abstract

To provide a light-weight lighting fixture having excellent heat radiation.SOLUTION: A lighting fixture comprises: a housing in which a back side opening 200 is formed in an area smaller than a front side opening 10; a lens unit 3 movable in a front-back direction inside the housing; a light source unit 21 capable of irradiating a front side so as to face the lens part 3; and a heat dissipating part 4 that is thermally connected to the light source unit 21, and has a heat radiation surface provided oppositely to the back side opening 200 on the back side with respect to the back side opening 200 and having a larger area than the back side opening 200 in front view.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to a lighting fixture.

  In recent years, LED lighting fixtures using LEDs (Light Emitting Diodes) as light sources have become widespread. Lighting fixtures using LEDs have the advantage that they generate less heat than those using halogen lamps, etc., but it is known that increasing the amount of generated heat will cause a decrease in the amount of light and adversely affect the service life. For example, spotlights for stage and studios, which are examples of lighting fixtures using LEDs, have increased heat generation due to the increasing output of light sources, and the overall size of the lighting fixtures has increased due to the increased size of the radiator. Tends to increase in size. For this reason, an efficient heat dissipation measure is desired for such a lighting fixture.

Japanese Unexamined Patent Publication No. 2016-110934

  The problem to be solved by the embodiments of the present invention is to provide a lighting fixture that is lightweight and has good heat dissipation.

  A lighting apparatus according to an embodiment of the present invention includes a housing formed with an area having a rear-side opening smaller than a front-side opening, a lens unit movable in a front-back direction inside the housing, and opposed to the lens unit. A light source unit that can irradiate the front side, and an area that is thermally connected to the light source unit and that faces the back side opening and is provided on the back side from the back side opening than the back side opening. And a heat dissipating part having a large heat dissipating surface.

  According to the embodiment of the present invention, it is possible to provide a light fixture that is lightweight and has good heat dissipation.

It is a perspective view which shows the external appearance of the lighting fixture which is embodiment of this invention. It is a longitudinal cross-sectional view which follows the A surface of FIG. 1 of the lighting fixture which is embodiment of this invention. It is a perspective view which shows partially the moving mechanism of the lighting fixture which is embodiment of this invention.

  With reference to FIG. 1 thru | or FIG. 3, the lighting fixture which is embodiment of this invention is demonstrated.

  As shown in FIGS. 1 and 2, a lighting fixture according to an embodiment of the present invention includes a first housing 1 that is a metal housing such as aluminum, and an internal space on the back side of the first housing 1. Are connected in a continuous manner, a light source unit 21 provided inside the second case 2, and a first case 1 facing the front side of the light source unit 21 The lens part 3 provided in the inside, and the heat radiating part 4 thermally connected to the back side of the light source part 21 are provided. Further, the protective member 5 provided on the outside of the heat radiating unit 4 and the second casing 2, the power source unit 6 provided on the upper surface of the first casing 1 for controlling the lighting of the light source unit 21, and the lens unit 3 A moving mechanism 7 capable of linearly moving in the front-back direction inside the first housing 1, and a substantially U-shaped arm portion 8 that is connected to a pair of side surfaces of the first housing 1 and supports the lighting device; Is provided.

  As shown in FIG. 1, the first housing 1 has a front opening 10 on the front side and is formed in a rectangular parallelepiped shape. The first housing 1 is formed so that the lens unit 3 can be moved in the frontal direction in the internal space. That is, the inner peripheral surface of the first housing 1 is formed so as to be at least outside the outer peripheral edge of the optical member 31 described later in the front view. As shown, it is connected to the front opening 20 of the second housing 2. The surface to which the first casing 1 and the second casing 2 are connected is formed so as to be open so that the internal spaces thereof are continuous. The back surface of the first housing 1 has a larger area than the front surface side opening 20 of the second housing 2. The first casing 1 is covered with a light-shielding member so that light emitted from the light source unit 21 does not leak from other than the front opening 10.

  Further, the first housing 1 has a plurality of metal banders 11 attached to the outer periphery of the front-side opening 10 by mounting brackets. The bander 11 has a function capable of controlling light distribution by adjusting the spread of light emitted from the light source unit 21. For example, a pair of band doors 11 is provided above and below the front-side opening 10 in the first housing 1 and a pair on the left and right.

  As shown in FIG. 2, the second casing 2 is formed as a substantially rectangular parallelepiped casing having a smaller volume than the first casing 1. The second housing 2 is a hollow housing having a front-side opening 20 and a back-side opening 200, and is connected to the back-side opening of the first housing 1 in alignment by fastening means 25 such as screws. The The rear side opening 200 of the second casing 2 is formed to have a smaller area in front view than the front side opening 10 of the first casing 1.

  As shown in FIG. 2, a light source unit 21 is provided on the back side of the second housing 2. The light source unit 21 is configured by mounting light emitting elements such as LEDs on a substrate 22 by a mounting method such as COB (Chip On Board). Further, the back side opening 200 is covered with a base portion 43 described later.

  The second housing 2 is formed by covering the space from the back surface of the first housing 1 to the base portion 43 with a light shielding member. The second housing 2 is formed such that the area of the rear side opening 200 is at least smaller than the area of the lens unit 3 in front view.

  The light source section 21 is provided with a cylindrical taper-shaped reflecting section 23 whose opening widens as it extends from the outer peripheral edge to the front side. The reflection unit 23 reflects the light emitted from the light source unit 21 to the front side. The reflection portion 23 is provided so that the opening on the foremost side is located inside the first housing 1. Note that the inclination of the reflecting portion 23 with respect to the light source portion 21 and the length in the frontal direction may be changed as appropriate, or the reflecting portion 23 may not be provided.

  Further, as another embodiment, the second casing 2 may have a shape other than a rectangular parallelepiped shape, and is formed as a funnel shape or stepped casing in which the opening area of the rear side opening 200 is smaller than the front side opening 20. Also good. For example, the second housing 2 is formed by connecting from the front surface of the substrate 22 to the back surface of the first housing 1 along the outer peripheral surface of the reflecting portion 23 so that the irradiation light from the light source unit 21 does not leak outside. A cylindrical tapered member may also be used. The second housing 2 may be formed by bending and integrally forming a sheet metal continuous with the first housing 1. Since the second housing 2 is formed as a housing integrated with the first housing 1, the number of locking members and the like can be reduced, so that the weight can be reduced.

  As shown in FIG. 1, the lens unit 3 has a lens frame 32 for fixing and connecting an optical member 31 such as a Fresnel lens or a plano-convex lens and the optical member 31 so as to be movable inside the first housing 1. Is provided. The lens frame 32 is a flat member provided along the inner periphery of the front-side opening 10 of the first housing 1. The outer peripheral edge of the optical member 31 is connected to the lens frame 32 by screwing or the like. By moving substantially linearly in the frontal direction in the first housing 1, the light distribution angle of the light emitted from the light source unit 21 is controlled and emitted to the front side of the first housing 1.

  The lens frame 32 has a cylindrical portion 72, which will be described later, integrally therebelow.

  As shown in FIGS. 1 and 2, the heat dissipating part 4 includes a heat dissipating fin part 41 having a plurality of heat dissipating fins, a heat pipe 42 provided so as to penetrate the heat dissipating fins of the heat dissipating fin part 41, The fin portion 41 has a base portion 43 erected on the back side. The heat radiation part 4 is provided exposed to the outside air.

  The radiating fin portion 41 is provided by arranging a plurality of radiating fins, which are metal plate-like members having excellent heat conductivity, in parallel. The heat radiating fins constituting the heat radiating fin portion 41 are formed, for example, as a substantially rectangular thin plate. The radiating fin portion 41 is provided with its upper and lower surfaces, both side surfaces, and the back surface exposed to the outside air.

  The heat pipe 42 is a longitudinal member provided so as to penetrate one end side so as to cross the radiating fin portion 41. Further, the other end of the heat pipe 42 is embedded in the side surface of the base portion 43. The other end of the embedded heat pipe 42 is disposed near the back surface of the light source unit 21 that generates heat.

  The heat pipe 42 is a member excellent in heat transport that is sealed by putting a working fluid in a metal cylindrical member. In the heat pipe 42, the working fluid evaporates inside one end that is in contact with the high temperature member, the evaporated working fluid moves to the other end that contacts the low temperature member, condenses, and returns to the liquid again. Heat transfer between members is performed by moving to one end side. The heat pipe 42 is connected to the light source unit 21 that is a heat source and is provided so as to be able to transport the heat of the base unit 43, which has a relatively high temperature, to the radiation fin unit 41, which has a relatively low temperature, and heat transport between the contacting members Is provided to be possible.

  The base portion 43 is a metal plate member having excellent heat conductivity. The base unit 43 is thermally connected to the light source unit 21. The base portion 43 is provided so as to be in close contact with the back surface of the substrate 22. The area of the front surface of the base portion 43 is formed larger than the area of the rear surface side opening 200 of the second housing 2. That is, a part of the front surface of the base portion 43 is formed so as to come into contact with the outside air.

  The heat dissipating unit 4 may be provided with a fan or the like in order to provide heat dissipating performance. Further, the position and number of the heat pipes 42 are arbitrary and may not be provided.

  As shown in FIG. 1, the protection member 5 is provided so as to protect at least the second housing 2 and the heat radiating portion 4 from damage caused by an external impact. The protective member 5 is formed as a frame-like member having excellent internal and external ventilation. The protective member 5 is provided so that outside air flows through the upper surface, the lower surface, both side surfaces, and the back surface. Further, the protection member 5 includes a mesh member 54 that protects the internal second casing 2 and the heat radiating portion 4 and can maintain air permeability to the inside. The protection member 5 is a member that protects the heat radiating part 4 provided exposed to the outside air from damage due to external impact.

  In a stage / studio or the like in which the lighting apparatus according to the embodiment of the present invention is used, preparation work is performed in which a plurality of lighting apparatuses are suspended and arranged in accordance with a program or a program. The work of preparing the lighting fixture at a high place is performed by an operating rod (not shown) or the like for operating the direction of the lighting fixture.

  For this reason, the protective member 5 has a handle 51 on the back surface that can be hooked with a T-shaped operation rod with its tip inclined to change the posture of the instrument. The handle 51 is a metal member having excellent durability. The handle 51 is formed in a substantially U shape. The handle portion 51 is formed at a position where it can be easily hooked by the operation rod.

  Furthermore, the lighting fixture which is embodiment of this invention has the back base 52 and the front base 53 on the lower surface.

  The rear pedestal 52 is a metal member having excellent durability that is connected to the lower surface of the protective member 5 and a position closer to the rear surface. The rear pedestal 52 is formed to be substantially L-shaped when viewed from the side.

  The front pedestal 53 is a metal member or the like having excellent durability provided connected to the lower surface of the first casing 1 and a position closer to the front surface. The height of the front pedestal 53 is provided to be approximately the same as the height of the rear pedestal 52.

  The rear pedestal 52 and the front pedestal 53 are placed on the floor to support the luminaire when the luminaire is stored without being used.

  As another embodiment, the lighting apparatus according to the embodiment of the present invention may have a pair of lower surface protection members (not shown) instead of the rear base 52 and the front base 53. The pair of lower surface protection members are warp-like protection members that are attached to the protection member 5 and the lower surface of the first housing 1 and that are long in the front-rear direction.

  The power supply unit 6 is driven by being electrically connected to an external power supply (not shown). As shown in FIG. 2, the power supply unit 6 is a metal casing that includes therein a control board 61 that can control lighting of the light source unit 21. The power supply unit 6 is attached and disposed on the upper surface of the first casing 1 by fastening means such as screws. The power supply unit 6 may be disposed via a mount or the like so as to be separated from the upper surface of the first housing 1.

  As shown in FIGS. 2 and 3, the moving mechanism 7 has a shaft portion 74 having a spiral groove portion 70, an operation portion 71 capable of rotating the shaft portion 74 in the circumferential direction, and an inner diameter through which the shaft portion 74 passes. A cylindrical portion 72 is formed, and a pin 73 is provided so as to penetrate from the side surface of the cylindrical portion 72 and have a tip fitted into the groove portion 70.

  The operation unit 71 is a handle provided to be connected to the back side of the shaft unit 74. When the operation portion 71 is rotated in the circumferential direction, the shaft portion 74 is rotated in conjunction with it. The shaft 74 passes through the inside of the first housing 1 and penetrates to the back side of the protective member 5 that is the back side of the lighting fixture. The groove portion 70 is provided in a portion of the shaft portion 74 within a range that fits inside the first housing 1. The groove portion 70 rotates in conjunction with the rotation of the shaft portion 74. As the spiral groove 70 rotates, the pin 73 engaged with the groove 70 linearly moves in the front-rear direction. As the pin 73 linearly moves in the front-rear direction, the cylindrical portion 72 and the lens frame 32 to which the pin 73 is fixed are also linearly moved in the front-rear direction. With these mechanisms, the lens unit 3 can move linearly in the front-back direction inside the first housing 1.

  The moving mechanism 7 may be provided with a guide portion (not shown). The guide portion is a linear member provided over the front-back direction inside the first housing 1. The guide portion is connected to the lens frame 32. Accordingly, when the lens unit 3 is linearly moved in the front direction by the moving mechanism 7, the lens frame 32 can be stably slid.

  Conventionally, a mechanism for linearly moving the light source unit in the frontal direction has been employed for adjusting the light distribution angle of the luminaire. However, in the case of considering a mechanism that changes the light distribution angle by sliding the light source unit, the heat radiating unit must be slid together with the light source unit in order to radiate heat generated from the light source unit. That is, when the heat radiating portion is slid to the front side together with the light source portion, the heat radiating portion is covered by the casing on the upper and lower surfaces and both side surfaces, and the heat radiating performance may be deteriorated.

  However, the lighting fixture according to the embodiment of the present invention is provided with the moving mechanism 7 capable of linearly moving the lens unit 3 in the frontal direction, so that the light source unit 21 is turned on at any light distribution angle. The heat radiating portion 4 can always be exposed to the outside air. Therefore, there is no possibility that the heat radiation performance of the heat radiating part 4 is deteriorated.

  As shown in FIG. 1, the arm portion 8 is attached to the outer side surface of the first housing 1. The arm unit 8 is connected to an attachment member such as a hanger to suspend a lighting fixture, and is attached to a lighting baton that can suspend a plurality of lighting fixtures. The arm portion 8 is attached to the first housing 1 so as to be rotatable.

  In the lighting apparatus according to the embodiment of the present invention, the heat radiation performance is improved by exposing the heat radiation part 4 to the outside air. That is, the heat radiation fin portion 41 is exposed to the outside air, and a part of the front surface of the base portion 43, which is a heat radiation surface having a larger area than the rear-side opening 200, is exposed to the outside air, so that efficient heat radiation can be expected. In addition, by having frame-shaped protective members 5 that allow sufficient ventilation on the top and bottom surfaces, both side surfaces, and the back surface outside the heat radiating section 4, the flow of outside air to the front surfaces of the heat radiating fin section 41 and the base section 43 is prevented. Therefore, it is possible to protect the second casing 2 and the heat radiating portion 4 while maintaining the heat radiating performance.

  In addition, the rear side opening 200 of the second casing 2 is narrower than the front side opening 10 of the first casing 1, and is provided as a volume that can cover the light source unit 21 and the reflecting plate 23. It has the effect of being able to reduce the number of members and reduce the weight of the luminaire by placing it on the casing 2 portion.

  In addition, since the area of the back side opening 200 of the second housing 2 is larger than the area of the base portion 43 in the front view, the heat radiating section 4 has a base when outside air also flows around the second housing 2. The area where the front surface of the portion 43 comes into contact with the outside air also increases, and the amount of outside air flowing into the heat radiating portion 4 increases. At the same time, the efficiency of heat exhaust from the heat radiating section 4 also increases, so that the heat dissipation performance of the lighting fixture is improved.

  In addition, by providing a large area in the front view of the base portion 43, it is possible to increase the number of the radiating fin portions 41 that are erected, and by reducing the length of the radiating fin portion 41 in the front-back direction accordingly. Can maintain heat dissipation performance. This makes it possible to reduce the size of the lighting fixture.

  Further, by having the frame-shaped protection member 5, it is possible to protect the second casing 2 and the heat radiating portion 4 while maintaining the heat radiating performance. Furthermore, since the entire heat dissipating part 4 is not covered with the housing, the number of members can be reduced and the lighting fixture can be reduced in weight.

  In addition, it is known that the user adjusts the irradiation direction by abutting the operating rod against an arbitrary part of the lighting fixture in the preparation work. By providing the rear protection member 52 and the front protection member 53 or a pair of lower protection members that protrude from the lower surface of the lighting fixture, the operation bar can be abutted against these members to adjust the irradiation direction. Thus, it is possible to prevent the operation rod from hitting the first casing 1, the second casing 2, and the heat radiating portion 4 to give an impact.

  In addition, since the power supply unit 6 is provided on the upper surface side of the lighting fixture, inflow of outside air from the lower side of the lighting fixture to the heat radiating portion 4 is not hindered, and the outer peripheral surface of the second housing 2 and the rear side opening 200 Since the outside air in contact with the front surface of the base portion 43 having a larger area is increased, there is an effect that the heat exhaust performance is also improved.

  In addition, since the power supply unit 6 is installed on the upper surface of the first housing 1, the luminaire that has been used is placed directly on the floor without providing a new protective member or changing the orientation of the luminaire. It is possible to reduce the labor of construction work.

  In addition, when the power supply unit 6 is installed on the upper surface of the first housing 1, in the preparation work in which the user often changes the direction of the lighting fixture suspended at a high place by hitting it with the operation rod from below. Since the power source unit 6 is less likely to receive an impact, there is an effect that the life of the lighting apparatus can be extended.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

1… First housing
2… Second housing
3 ... Lens part
4… Heat dissipation part
5… Protective member
6… Power supply
7 ... Movement mechanism
8 ... arm part

Claims (4)

A housing in which the opening on the back side is smaller than the opening on the front side;
A lens portion movable in the front-rear direction inside the housing;
A light source unit capable of irradiating the front side facing the lens unit;
A heat-dissipating part thermally connected to the light source part and having a heat-dissipating surface having a larger area than the back-side opening in front view provided opposite to the back-side opening and provided on the back side from the back-side opening;
A lighting apparatus comprising:   The lighting fixture of Claim 1 which has a thermal radiation part provided in the back side of the said light source part, and exposed to external air.   The lighting apparatus according to claim 1, wherein a power supply unit that controls lighting of the light source unit is provided on an upper surface side of the first casing.   The lighting apparatus according to claim 1, wherein a protection member that protects the heat radiating portion is provided.

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