JP4674269B1 - Light bulb shaped LED lamp and lighting apparatus - Google Patents

Abstract

A light bulb shaped LED lamp having a simple structure and improved heat dissipation, and a lighting fixture using the light bulb shaped LED lamp.
A projector 10 as a lighting fixture includes a lamp 20 having an umbrella part 22 and a socket part 23 in which an irradiation opening 21 is formed, and a light bulb shaped LED lamp 30 connected to the socket part. The bulb-type LED lamp is generated in the light source unit including the LED element 41, the holder unit 50 including the base 53 that holds the light source unit and is electrically connected to the light source unit, and is connected to the light source unit. The heat dissipating part 60 is provided so as to be conducted with respect to the holder part, and the pressing means 70 for urging the heat dissipating part 60 in the direction of contacting the inner surface of the umbrella part of the lamp. And have.
[Selection] Figure 1

Description

  The present invention relates to a light bulb shaped LED lamp and a lighting fixture.

  Various light bulb-type LED lamps that can be used in place of light bulbs have been proposed as measures for saving energy in lighting fixtures. The bulb-type LED lamp includes a light source unit including an LED element. Patent Document 1 describes a light bulb-type LED lamp provided with a fan for radiating heat generated in an LED element.

JP2007-265892

  As in Patent Document 1, a light bulb-type LED lamp that radiates heat with a fan has a complicated structure and a high manufacturing cost.

  The present invention has been made paying attention to improving heat dissipation by using an umbrella part included in a lamp, and uses a light bulb-shaped LED lamp having a simple structure and improved heat dissipation, and the light bulb-shaped LED lamp. The purpose is to provide a lighting fixture.

In order to achieve the above object, a light bulb shaped LED lamp of the present invention is a light bulb shaped LED lamp connected to a socket portion of a lamp provided with an umbrella portion in which an irradiation opening is formed,
A light source unit comprising an LED element;
A holder unit that holds the light source unit and includes a base electrically connected to the light source unit;
A heat dissipating part that is connected to the light source part and is movably provided with respect to the holder part while conducting heat generated in the light source part;
A pressing unit that urges the heat dissipating part in a direction in which the lamp is in contact with the inner surface of the umbrella part of the lamp.

  Moreover, the lighting fixture of this invention for achieving the said objective is a lighting fixture provided with the lamp | ramp provided with the umbrella part and socket part in which irradiation opening was formed, and said lightbulb-shaped LED lamp connected to the said socket part. It is.

  According to the light bulb-shaped LED lamp and the lighting fixture of the present invention, the heat dissipating part connected to the light source part is provided movably with respect to the holder part, and the elastic force is urged from the pressing means. In contact with the inner surface of the lamp umbrella. Therefore, the heat generated in the light source part is conducted to the umbrella part through the heat radiating part, and is radiated from the umbrella part. As described above, since the heat dissipation can be enhanced by using the umbrella part included in the lamp, it is possible to provide a light bulb shaped LED lamp having a simple structure and improved heat radiation, and a lighting fixture using the light bulb shaped LED lamp. Is possible.

It is a figure which shows the light projector which concerns on 1st Embodiment as a lighting fixture which has a lamp and a lightbulb-shaped LED lamp in a partial cross section. It is a front view which shows the lightbulb-shaped LED lamp which concerns on 1st Embodiment in the state which resisted the elastic force which a pressing means urges, and moved the thermal radiation part upwards in the figure. It is a front view which shows the lightbulb-shaped LED lamp shown by FIG. 1 in the state which moved the thermal radiation part below in the figure with the elastic force which a pressing means urges | biases. FIG. 4A is a top view showing the light bulb-shaped LED lamp, and FIG. 4B is a diagram showing the light source part in a state where a part of the heat radiating part is removed. It is a perspective view which shows the switching mechanism which hold | maintains a thermal radiation part in an initial position, or cancels | releases holding | maintenance to an initial position against the elastic force which a pressing means urges | biases. It is a figure which shows the floodlight which concerns on 2nd Embodiment as a lighting fixture which has a lamp and a lightbulb-shaped LED lamp in a partial cross section. It is a front view which shows the lightbulb-shaped LED lamp which concerns on 2nd Embodiment in the state by which the thermal radiation part was extended below in the figure with respect to the holder part. It is a front view which shows the example of a change of a holder part. It is a figure which shows the street light which concerns on 3rd Embodiment as a lighting fixture which has a lamp and a lightbulb-shaped LED lamp in a partial cross section.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The dimensional ratios in the drawings are exaggerated for convenience of explanation, and are different from the actual ratios.

(First embodiment)
Referring to FIG. 1, a projector 10 as a lighting fixture includes a lamp 20 and a light bulb shaped LED lamp 30. The lamp 20 has an umbrella part 22 in which an irradiation opening 21 is formed, and a socket part 23. The lamp 20 is formed from a metal material such as aluminum, and the umbrella portion 22 functions as a reflector. The bulb-type LED lamp 30 connected to the socket portion 23 can be used in place of the bulb-type halogen bulb that was originally connected to the projector 10.

  Referring to FIGS. 2 to 5, the light bulb shaped LED lamp 30 is briefly described. The light source unit 40 includes an LED element 41, and the base that holds the light source unit 40 and is electrically connected to the light source unit 40. 53, a heat radiating unit 60 connected to the light source unit 40 and transmitting heat generated in the light source unit 40 while being movably provided with respect to the holder unit 50; And pressing means 70 for urging the elastic force in the direction of contact with the inner surface 22a of the umbrella portion 22 of the lamp 20. Details will be described below.

  4A and 4B, the light source unit 40 includes an LED element unit 42 in which the LED elements 41 are arranged, a substrate 43 on which the LED element unit 42 is mounted, and an attachment for attaching the substrate 43 to the surface. A block 44 and a lens unit 45 fixed to the mounting block 44 so as to cover the LED element unit 42 are provided. The LED element 41 is a white LED, for example, and uses a high-intensity power LED. In the LED element unit 42, a plurality of LED elements 41 are arranged. The mounting block 44 is formed from a metal material having good heat conductivity such as copper or aluminum, and heat generated in the LED element unit 42 is conducted through the substrate 43. The lens unit 45 has a hemispherical shape and is made of a transparent acrylic resin. Since the lens unit 45 is transparent, in FIG. 4A, the LED element 41, the LED element unit 42, and the substrate 43 are represented by solid lines.

  The holder unit 50 includes first and second holders 51 and 52 formed in a nested manner. The first holder 51 has a hollow cylindrical shape and is connected to the back surface of the mounting block 44 of the light source unit 40. The second holder 52 has a hollow cylindrical shape having an opening and a bottom. A base 53 is provided at the bottom of the second holder 52. The inner diameter dimension of the opening of the second holder 52 is larger than the outer diameter dimension of the first holder 51. The first holder 51 is slidable in the axial direction within the second holder 52 with respect to the second holder 52. The holder unit 50 holds the light source unit 40 movably in the axial direction by the first holder 51 moving in the axial direction in the second holder 52.

  In the present embodiment, the heat radiating portion 60 includes a plate-like heat radiating plate 61 extending beyond the light source portion 40 toward the irradiation opening 21. The plate-like heat radiating plate 61 is attached to the attachment block 44 of the light source unit 40, and heat generated in the LED element unit 42 is conducted. The plurality of plate-like heat sinks 61 are attached at intervals along the circumferential direction of the attachment block 44 and extend radially (see FIG. 4A). Each of the plate-like heat radiating plates 61 has a wing shape that extends and extends toward the irradiation opening 21 around the LED element unit 42. The shape of the outer peripheral edge of the plate-shaped heat radiation plate 61 is not particularly limited, but the inner surface shape of the umbrella portion 22 in the projector 10 generally has an arc shape. It is formed in an arc shape. However, the curvature of the outer peripheral shape of the plate-like heat radiating plate 61 and the curvature of the inner surface shape of the umbrella part 22 do not need to match. This is because heat can be conducted if any part of the outer peripheral edge of the plate-like heat radiating plate 61 can be in contact with the inner surface 22 a of the umbrella portion 22. Further, by applying a coating agent such as oil having good heat conductivity between the outer peripheral edge of the plate-shaped heat radiation plate 61 and the inner surface 22a of the umbrella portion 22, the plate-shaped heat radiation plate 61 and the umbrella portion 22 are more It is because it can be made to contact favorably. The material for forming the plate-like heat radiating plate 61 is not particularly limited, but is preferably formed from a metal material having good heat conductivity such as copper or aluminum so that heat generated in the light source unit 40 can be easily conducted. The holder unit 50 holds the light source unit 40 movably in the axial direction. As a result, the plate-like heat radiating plate 61 connected to the light source unit 40 is provided so as to be movable with respect to the holder unit 50.

  In the case of illumination using a white LED, even if a plate material is present in the luminous flux, the plate material is hardly heated by light. Therefore, the plate-like heat radiating plate 61 extends toward the irradiation opening 21 beyond the light source unit 40, but is hardly heated by light, and a sufficient heat radiating effect can be obtained.

  Moreover, since a high-intensity power LED is used, the plate-like heat radiation plate 61 cannot be visually recognized at the time of lighting, and there is no problem in design.

  2 and 3, the pressing means 70 is constituted by a tension coil spring 71 in the illustrated example. One end of the tension coil spring 71 is attached to the upper support plate 72 in the first holder 51, and the other end is attached to the lower support plate 73 in the second holder 52. The elastic force of the tension coil spring 71 acts to pull the first holder 51 into the second holder 52. Therefore, in a state where the bulb-shaped LED lamp 30 is connected to the socket portion 23 of the lamp 20, the tension coil spring 71 is elastic in the direction in which the plate-like heat radiating plate 61 is brought into contact with the inner surface 22 a of the umbrella portion 22 of the lamp 20. Energizing power.

  FIG. 2 shows a state in which the plate-like heat radiating plate 61 is moved upward in the drawing against the elastic force urged by the tension coil spring 71, and FIG. 3 shows a state in which the tension coil spring 71 is urged. A state in which the plate-like heat radiating plate 61 is moved downward in the figure by the generated force is shown. In a state where the bulb-shaped LED lamp 30 is connected to the socket portion 23 of the lamp 20 (see FIG. 1), the plate-like heat sink 61 is in the most extended state (see FIG. 2) and the most contracted position (see FIG. 1). 3), the inner surface 22a of the umbrella portion 22 is brought into contact with the elastic force of the tension coil spring 71. Therefore, the same bulb-shaped LED lamp 30 can be applied to the lamp 20 having a different shape of the umbrella portion 22.

  Referring to FIG. 5, the holder 50 holds the plate-like heat radiating plate 61 at the initial position against the elastic force urged by the tension coil spring 71 or releases the holding at the initial position. A switching mechanism 80 is provided. For the sake of simplification, illustration of the plate-like heat radiation plate 61 and the like is omitted in FIG.

  The switching mechanism 80 includes first and second holes 81 and 82 provided so as to penetrate the second holder 52 along the axial direction, and a communication hole 83 that connects the first hole 81 and the second hole 82. And a pin member 84 attached to the first holder 51 so as to protrude in the radial direction. The first hole 81 is shorter than the second hole 82. The communication hole 83 connects the first hole 81 and the second hole 82 at a position on the opening side of the second holder 52. A pin member 84 is fitted in these holes 81, 82, 83 so as to be slidable. The switching mechanism 80 holds the position of the heat radiating portion 60 at the initial position against the elastic force urged by the tension coil spring 71 by the pin member 84 engaging with the end portion 81 a of the first hole 81. ing.

  From this state, the light source unit 40 is pulled in the direction of the arrow A1, and the pin member 84 of the first holder 51 is pulled up from the end 81a of the first hole 81. Next, the light source unit 40 is rotated in the direction of the arrow A <b> 2, and the pin member 84 is positioned in the second hole 82 from the first hole 81 through the communication hole 83. Then, when the tension state of the light source unit 40 is loosened, the pin member 84 moves in the second hole 82, and the switching mechanism 80 releases the holding of the plate-like heat radiation plate 61 at the initial position. The plate-like heat radiating plate 61 moves in the direction of the arrow A3 by the elastic force urged by the tension coil spring 71.

  Referring to FIGS. 1 and 2, holder portion 50 has an end surface 52 a that abuts on end surface 24 a of casing 24 (insulator) that constitutes socket portion 23.

  In a general light bulb, the part of the base is only connected to the socket part, and the portion continuing to the base does not come into contact with the end surface of the casing (insulator) constituting the socket part. For this reason, the stress which acted on the light bulb by shaking or vibration acts only on the screwed portion between the base and the socket portion. For this reason, there exists a malfunction that the screwed-in part is easy to loosen.

  On the other hand, in the present embodiment, since the end surface 52a of the holder portion 50 abuts on the end surface 24a of the casing 24 that constitutes the socket portion 23, the stress acting on the bulb-shaped LED lamp 30 is affected by the cap 53 and the socket. It acts not only on the screwed part with the part 23 but also on the part where the end faces 52a, 24a contact each other. For this reason, even if a relatively large stress is applied, the screwed portion is difficult to loosen, and the projector 10 can be used stably over a long period of time. In addition, it is also included in the scope of the present invention that the end faces 52a and 24a are brought into contact with each other via an O-ring.

  The operation of this embodiment will be described.

  As shown in FIG. 5, the switching mechanism 80 has a plate-like heat radiating plate against the elastic force urged by the tension coil spring 71 by the pin member 84 engaging with the end 81 a of the first hole 81. The position 61 is held at the initial position.

  The base 53 of the bulb-shaped LED lamp 30 is screwed into the socket portion 23 of the lamp 20 and connected. When the light bulb-shaped LED lamp 30 is connected to the lamp 20, the plate-like heat sink 61 held at the initial position is separated from the inner surface 22a of the umbrella portion 22. A coating agent such as oil having good heat conductivity is applied between the outer peripheral edge of the plate-shaped heat radiation plate 61 and the inner surface 22a of the umbrella portion 22.

  From this state, the light source unit 40 is pulled in the direction of arrow A1 in FIG. 5, the pin member 84 of the first holder 51 is pulled up from the end 81a of the first hole 81, the light source unit 40 is rotated in the direction of arrow A2, The pulling state of the light source unit 40 is loosened. The plate-like heat radiating plate 61 moves in the direction of the arrow A3 by the elastic force urged by the tension coil spring 71.

  Thereby, as shown in FIG. 1, the plate-like heat radiating plate 61 has the tension coil spring 71 at a position between the most extended state (see FIG. 2) and the most contracted position (see FIG. 3). It contacts the inner surface 22a of the umbrella part 22 in a state where the elastic force is urged.

  When the projector 10 is turned on, the heat generated in the LED element 41 is conducted to the attachment block 44 and further conducted to the plate-like heat radiation plate 61 attached to the attachment block 44. The heat conducted to the plate-like heat radiating plate 61 is radiated from the heat radiating plate 61 itself, is conducted to the umbrella portion 22 and is radiated from the umbrella portion 22. Since heat is radiated not only from the plate-like heat radiating plate 61 but also from the umbrella portion 22 having a relatively large area, the heat radiation performance of the projector 10 is enhanced.

  As described above, in the first embodiment, the plate-like heat radiating plate 61 connected to the light source unit 40 is provided so as to be movable with respect to the holder unit 50, and an elastic force is applied from the tension coil spring 71. In an urged state, the lamp 20 is in contact with the inner surface 22 a of the umbrella portion 22. Therefore, the heat generated in the light source unit 40 is conducted to the umbrella unit 22 through the plate-like heat radiating plate 61 and is radiated from the umbrella unit 22. Thus, since the heat dissipation can be enhanced by using the umbrella part 22 included in the lamp 20, the light bulb shaped LED lamp 30 having a simple structure and enhanced heat radiation, and the projector 10 using the light bulb shaped LED lamp 30 are provided. Can be provided. In addition, the manufacturing cost can be reduced as compared with a bulb-type LED lamp that radiates heat with a fan. Further, since the plate-like heat radiating plate 61 contacts the inner surface 22a of the umbrella portion 22 in a state where the elastic force of the tension coil spring 71 is urged, the plate-like heat radiating plate 61 is the same for the lamp 20 having a different shape. The bulb-type LED lamp 30 can be applied.

  Further, the plate-like heat radiating plate 61 extends beyond the light source unit 40 toward the irradiation opening 21, but is hardly heated by light, ensuring a relatively large heat radiating area and obtaining a sufficient heat radiating effect. be able to. Moreover, since a high-intensity power LED is used, the plate-like heat radiation plate 61 cannot be visually recognized at the time of lighting, and there is no problem in design.

  Moreover, since the holder part 50 has the end surface 52a which contact | abuts to the end surface 24a of the casing 24 which comprises the socket part 23, the stress which acts on the lightbulb-shaped LED lamp 30 is the screwing of a nozzle | cap | die 53 and the socket part 23 It acts not only on the part but also on the part where the end faces 52a, 24a contact each other. For this reason, even if a relatively large stress is applied, the screwed portion is difficult to loosen, and the projector 10 can be used stably over a long period of time.

(Second Embodiment)
In the second embodiment, the configuration of the heat dissipating unit 160 is modified. The same members as those shown in FIGS.

  Referring to FIGS. 6 and 7, a light bulb shaped LED lamp 130 of the second embodiment is similar to the light bulb shaped LED lamp 30 of the first embodiment, and includes a light source unit 40 including an LED element 41, and a light source unit. The holder unit 150 includes a base 53 that holds the connector 40 and is electrically connected to the light source unit 40, and the heat generated in the light source unit 40 connected to the light source unit 40 is conducted and moves with respect to the holder unit 150. A heat dissipating part 160 provided freely, and a pressing means 170 that urges the heat dissipating part 160 in a direction to contact the inner surface 22a of the umbrella part 22 of the lamp 20 are provided.

  The holder part 150 does not expand and contract, and one holder 151 is connected to the back surface of the mounting block 44 of the light source part 40. A base 53 is provided at the bottom of the holder 151.

  In the present embodiment, the heat dissipating unit 160 includes a plate-shaped heat dissipating plate 161 disposed closer to the holder unit 150 than the light source unit 40. The plate-like heat radiating plate 161 has a ring shape that is inserted through the holder 151. The center hole of the plate-shaped heat radiation plate 161 is formed to be slightly larger than the outer diameter of the holder 151 so that the plate-shaped heat radiation plate 161 is not hindered from moving along the holder 151. The shape of the outer peripheral edge of the plate-shaped heat radiation plate 161 is not particularly limited, but is formed on an inclined surface so as to be easily in contact with the neck portion 25 located at the base of the umbrella portion 22 in the projector 10. A coating agent such as oil having good heat conductivity is applied between the outer peripheral edge of the plate-shaped heat radiation plate 161 and the inner surface 22 a of the umbrella portion 22. The material for forming the plate-shaped heat radiation plate 161 is not particularly limited, but is preferably formed from a metal material having good heat conductivity such as copper or aluminum so that heat generated in the light source unit 40 can be easily conducted. The plate-shaped heat radiation plate 161 is attached to the attachment block 44 of the light source unit 40 via a coil spring 171 constituting the pressing means 170 and hangs down. The plate-like heat radiating plate 161 is provided so as to be movable with respect to the holder portion 150 by expansion and contraction of the coil spring 171.

  The pressing means 170 is composed of a coil spring 171. One end of the coil spring 171 is attached to the back surface of the attachment block 44, and the other end is attached to the plate-like heat sink 161. When the plate-like heat radiating plate 161 moves to the mounting block 44 side, the coil spring 171 is compressed and a resilience is generated. In a state where the bulb-shaped LED lamp 130 is connected to the socket portion 23 of the lamp 20, the plate-like heat radiating plate 161 contacts the neck portion 25 of the umbrella portion 22 and moves to the mounting block 44 side. Therefore, the coil spring 171 urges the plate-like heat radiating plate 161 with a resilient force in a direction in which the coil spring 171 is brought into contact with the inner surface 22 a of the umbrella portion 22 of the lamp 20. The material for forming the coil spring 171 is not particularly limited, but it is preferably formed from a metal material having good heat conductivity such as copper or aluminum so that the heat generated in the light source unit 40 can be easily conducted to the plate-like heat radiating plate 161. .

  In 2nd Embodiment, it has the 2nd plate-shaped heat sink 162 as another heat radiating part connected to the light source part 40 and the heat which generate | occur | produced in the light source part 40 is conducted. This 2nd plate-shaped heat sink 162 has the same wing | blade shape as the plate-shaped heat sink 61 in 1st Embodiment. However, it is different from the plate-like heat radiating plate 61 in the first embodiment in that the holder portion 150 is not movably provided. Even if the second plate-shaped heat radiating plate 162 is not in contact with the inner surface 22a of the umbrella portion 22, the heat conducted to the second plate-shaped heat radiating plate 162 can be radiated from the heat radiating plate 162 itself. In the illustrated example, the dimension of the second plate-like heat sink 162 is adjusted so that the bulb-shaped LED lamp 130 can be in contact with the inner surface 22a of the umbrella portion 22 in a state where the bulb-shaped LED lamp 130 is connected to the socket portion 23 of the lamp 20.

  The operation of this embodiment will be described.

  The base 53 of the bulb-shaped LED lamp 130 is screwed into the socket portion 23 of the lamp 20 and connected. In a state where the bulb-shaped LED lamp 130 is connected to the socket portion 23 of the lamp 20, the plate-like heat sink 161 contacts the neck portion 25 of the umbrella portion 22 and moves toward the mounting block 44. The plate-shaped heat radiating plate 161 contacts the inner surface 22a of the umbrella portion 22 in a state where the elastic force of the coil spring 171 is urged.

  When the projector 10 is turned on, the heat generated in the LED element 41 is conducted to the attachment block 44 and further conducted to the plate-like heat radiation plate 161 attached to the attachment block 44 via the coil spring 171. The heat conducted to the plate-like heat radiating plate 161 is conducted from the neck portion 25 to the umbrella portion 22 and is radiated from the umbrella portion 22. Since heat is radiated not only from the plate-shaped heat radiating plate 161 but also from the umbrella portion 22 having a relatively large area, the heat radiation performance of the projector 10 is enhanced. Further, the heat conducted to the second plate-like heat radiating plate 162 is radiated from the heat radiating plate 162 itself, is conducted to the umbrella portion 22 and is radiated from the umbrella portion 22.

  As described above, also in the second embodiment, the plate-like heat radiation plate 161 connected to the light source unit 40 is provided so as to be movable with respect to the holder unit 150, and elastic force is applied from the pressing unit 170. In an energized state, the lamp 20 is in contact with the inner surface 22 a of the umbrella portion 22. Therefore, the heat generated in the light source unit 40 is conducted to the umbrella unit 22 through the plate-shaped heat radiating plate 161 and is radiated from the umbrella unit 22. Further, the heat conducted to the second plate-like heat radiating plate 162 is radiated from the heat radiating plate 162 itself, is conducted to the umbrella portion 22 and is radiated from the umbrella portion 22. As described above, since the heat dissipation can be enhanced by using the umbrella portion 22 included in the lamp 20, the light bulb-type LED lamp 130 with a simple structure and high heat dissipation, and the projector 10 using the light bulb-shaped LED lamp 130 are provided. Can be provided. In addition, the manufacturing cost can be reduced as compared with a bulb-type LED lamp that radiates heat with a fan. Furthermore, since the plate-shaped heat radiation plate 161 contacts the inner surface 22a of the umbrella portion 22 in a state where the elastic force of the coil spring 171 is urged, the same is applied to the lamp 20 having a different shape of the umbrella portion 22. The light bulb shaped LED lamp 130 can be applied.

(Modification example of holder part 250)
Referring to FIG. 8, holder unit 250 can be configured so that unit 251 can be selected and combined in accordance with a required function. Necessary functions can be added to the unit 251. Examples of the unit 251 include a unit having a function of controlling network communication, a unit having an AC / DC conversion function, and a unit having a cooling fan. Since the holder portion 250 is configured by combining the units 251, a light bulb shaped LED lamp having a desired function can be formed.

(Third embodiment)
Referring to FIG. 9, a street lamp 310 as a lighting fixture according to the third embodiment includes a lamp 320 and a light bulb-shaped LED lamp 330 as in the first embodiment. The lamp 320 has an umbrella part 322 in which an irradiation opening 321 is formed, and a socket part 323. The lamp 320 is made of a metal material such as aluminum, and the umbrella portion 322 functions as a reflector. The light bulb shaped LED lamp 330 connected to the socket part 323 can be used in place of the light bulb type halogen bulb originally connected to the projector 310. Reference numeral 325 in the drawing indicates a cover member that closes the irradiation opening 321.

  The light bulb-shaped LED lamp 330 includes a light source unit 340 including an LED element, a holder unit 350 including a base 353 that holds the light source unit 340 and is electrically connected to the light source unit 340, and a light source connected to the light source unit 340. The heat generated in the part 340 is conducted and the heat radiating part 360 is provided so as to be movable with respect to the holder part 350, and the elasticity in the direction in which the heat radiating part 360 is brought into contact with the inner surface 322a of the umbrella part 322 of the lamp 320. Pressing means 370 for biasing the force.

  In the street light of the third embodiment, the holder part 350 holds the light source part 340 via the link mechanism 380 so as to be rotatable. The link mechanism 380 includes a shaft 381 rotatably provided at the distal end of the holder portion 350, and a base end portion of the light source 340 is rotatably connected to the distal end of the shaft. As shown in the drawing, a tension coil spring 371 that constitutes the pressing means 370 is connected to the base end 381a of the shaft 381. The elastic force of the tension coil spring 371 urges the heat radiating portion 360 in the direction of contacting the inner surface 322a of the umbrella portion 322 of the lamp 320. The heat radiating part 360 may have a plate shape such as a heat radiating fin or a block shape.

  Depending on the third embodiment, the heat radiating part 360 connected to the light source part 340 is provided to be rotatable with respect to the holder part 350, and in a state where the elastic force is urged from the tension coil spring 371, The lamp 320 is in contact with the inner surface 322a of the umbrella portion 322 in a parallel state. Therefore, the heat generated in the light source unit 340 is conducted to the umbrella unit 322 via the heat radiation unit 360 and is radiated from the umbrella unit 322. As described above, since the heat dissipation can be enhanced by using the umbrella part 322 included in the lamp 320, the light bulb-shaped LED lamp 330 having a simple structure and high heat radiation, and a street light using the light bulb-shaped LED lamp 330 are provided. 310 can be provided. In addition, the manufacturing cost can be reduced as compared with a bulb-type LED lamp that radiates heat with a fan. Furthermore, since the heat radiating part 360 contacts the inner surface 322a of the umbrella part 322 in a state where the elastic force of the tension coil spring 371 is urged, the same light bulb is applied to the lamp 320 having a different shape of the umbrella part 22. The shape LED lamp 330 can be applied.

(Other modifications)
Although a projector is taken as an example of a lighting fixture, the present invention is not limited to this. The present invention can be applied to various light bulb-shaped LED lamps and lighting fixtures using the light-bulb LED lamps as long as the heat dissipation can be improved by using the umbrella part included in the lamp.

  Moreover, although the case where white LED and high-intensity power LED were used as the LED element 41 was illustrated, it is not limited to this case.

10 Floodlight (lighting fixture),
20 lamps,
21 Irradiation aperture,
22 Umbrella part,
22a The inner surface of the umbrella,
23 Socket part,
24 casing,
24a the end face of the casing,
25 neck,
30 Light bulb shaped LED lamp,
41 LED elements,
40 light source,
41 LED elements,
42 LED element unit,
44 mounting block,
45 Lens unit,
50 holder part,
51 first holder,
52 second holder,
52a The end face of the holder part,
53,
60 heat dissipation part,
61 Plate-shaped heat sink (heat dissipation part),
70 pressing means,
71 tension coil spring,
80 switching mechanism,
130 bulb-type LED lamp,
150 holder part,
151 holder,
160 heat dissipation part,
161 Plate-like heat sink (heat dissipating part),
162 second plate-like heat sink,
170 pressing means,
171 Coil spring,
250 holder part,
251 units,
310 Street light (lighting equipment),
320 lights,
321 Irradiation aperture,
322 umbrella part,
322a The inner surface of the umbrella,
323 socket part,
330 bulb-type LED lamp,
340 light source,
350 holder part,
353,
360 heat dissipation part,
370 pressing means,
371 tension coil spring,
380 Link mechanism 381 shaft.

Claims (5)

A light bulb shaped LED lamp connected to a socket part of a lamp having an umbrella part in which an irradiation opening is formed,
A light source unit comprising an LED element;
A holder unit that holds the light source unit and includes a base electrically connected to the light source unit;
A heat dissipating part that is connected to the light source part and is movably provided with respect to the holder part while conducting heat generated in the light source part;
A light-bulb-type LED lamp having pressing means for urging a resilient force in a direction of contacting the heat radiating portion with an inner surface of the umbrella portion of the lamp.   The light bulb-shaped LED lamp according to claim 1, wherein the heat dissipating part includes a plate-like heat dissipating plate extending toward the irradiation opening beyond the light source part.   The light bulb-shaped LED lamp according to claim 1 or 2, wherein the heat dissipating part includes a plate-like heat dissipating plate disposed closer to the holder part than the light source part.   The light bulb shaped LED lamp according to any one of claims 1 to 3, wherein the holder part has an end face that abuts on an end face of a casing constituting the socket part.   The lighting fixture which has a lightbulb-shaped LED lamp as described in any one of Claims 1-4 connected to the lamp | ramp provided with the umbrella part and socket part in which the irradiation opening was formed, and the said socket part.

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