JP2016058144A - Light-emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting device capable of coping with both of a use state of distributing light to the whole periphery of a device center axis, and a use state of distributing light to a part of the periphery of the device center axis.SOLUTION: A light-emitting device 1A includes a connection part 7 that can change a positional relationship of light source units 2 to another position relationship obtained by rotating one light source unit 2 relatively to the other light source unit 2 with a straight line parallel with a device center axis as a center. By changing a positional relationship of the light source units 2 connected by the connection part 7, the arrangement state of the light source units can be changed to a first use state in which a light radiation direction from the three or more light source units 2 is in a radial state, and a second use state in which the light radiation direction from the three or more light source units 2 is an eccentric direction compared to the first use state. In at least the first use state, an air passage 10 through which air cooling the light source units 2 passes are formed between adjacent light source units.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a light emitting device.

  In Patent Document 1 below, a light beam is provided by providing a pivot point (141) that allows a main body (11) having an attachment surface to which an LED light source (12) is attached to rotate 360 degrees with respect to a base (connector 14). An LED lamp having an adjustable irradiation direction is disclosed.

Utility Model Registration No. 3179750

  The LED lamp of Patent Document 1 cannot be used for applications where light should be distributed around the entire circumference because the light irradiation direction is one direction. For applications where light must be distributed around the entire periphery, it is necessary to use other LED lamps. When there is both an application that distributes light around the entire circumference and an application that distributes light in a specific direction, both LED lamps that distribute light around the entire circumference and LED lamps that distribute light in a specific direction are prepared. However, since it is necessary to use both properly, the cost increases.

  The present invention has been made in order to solve the above-described problems. In both the usage state in which light is distributed around the entire center axis of the apparatus and the usage state in which light is distributed over a part of the periphery of the apparatus central axis. It is an object of the present invention to provide a light emitting device that can be used.

  The light emitting device according to the present invention connects three or more light source units and adjacent light source units, and the positional relationship between the light source units is set so that one light source unit is centered on a straight line parallel to the device central axis. A light emitting direction from three or more light source units when viewed from a direction parallel to the central axis of the apparatus. The first usage state in which the light becomes radial and the second usage state in which the light irradiation directions from three or more light source units are offset from the first usage state when viewed from a direction parallel to the central axis of the device In addition, the arrangement state of three or more light source units can be changed, and can be changed between the first use state and the second use state by changing the positional relationship between the light source units connected by the connecting portion. Less In the first use state, between the light source units adjacent to each other, the air passage through which air for cooling the light source unit is formed.

  According to the light emitting device of the present invention, the positional relationship between the connected light source units is such that one light source unit is rotated relative to the other light source unit around a straight line parallel to the central axis of the device. By using the connecting portion that can be changed to the positional relationship, the first use state in which light is distributed around the entire center axis of the device and the second use state in which light is distributed on a part of the periphery of the center axis of the device are supported. It becomes possible.

It is a perspective view which shows the light-emitting device (1st use condition) of Embodiment 1 of this invention. It is a perspective view which shows the light-emitting device (2nd use condition) of Embodiment 1 of this invention. It is a perspective view which shows the state which set the light emitting apparatus of the 2nd use condition to the attitude | position in which an apparatus central axis becomes horizontal. It is a disassembled perspective view which shows the connection part which connects the light source units with which the light-emitting device shown in FIG. 1 is provided. It is a disassembled perspective view which shows the modification of the connection part which connects the light source units with which the light-emitting device shown in FIG. 1 is provided.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing a light-emitting device 1A (first use state) according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing the light emitting device 1A (second use state) according to the first embodiment of the present invention. FIG. 3 is a perspective view showing a state where the light emitting device 1A in the second use state is in a posture in which the central axis of the device is horizontal. FIG. 4 is an exploded perspective view showing a connecting portion 7 that connects the light source units 2 included in the light emitting device 1 </ b> A shown in FIG. 1. FIG. 5 is an exploded perspective view showing a modification of the connecting portion that connects the light source units 2 included in the light emitting device 1A shown in FIG.

  The light-emitting device 1A of the first embodiment shown in these drawings connects the light source unit 2, the light source unit support 3, the base 4, the base 5, the entire rotating unit 6, and the adjacent light source units 2. And a connecting portion 7 to be provided. As the base 4, for example, a screw-type base such as E39 base (Φ39 mm), E26 base (Φ26 mm) can be preferably used. A straight line passing through the center of the base 4 becomes the central axis of the light emitting device 1A. The central axis of the light emitting device 1A is referred to as “device central axis”. The base 4 is fixed to a socket (not shown). The base 4 has a function as an electrical contact for power supplied to the light source unit 2 and a function as a fixing portion for fixing the light emitting device 1 </ b> A to a use location.

  As shown in FIG. 1, the light emitting device 1 </ b> A according to the first embodiment includes three light source units 2. The three light source units 2 have substantially the same configuration. The light source unit support 3 supports the three light source units 2. The light source unit support 3 has a substantially disk shape whose central axis coincides with the central axis of the apparatus and whose outer diameter is larger than that of the base 5. The light source unit support 3 includes a fixing portion 3a that can fix each of the three light source units 2 included in the light emitting device 1A. The fixed portion 3a is configured as a recess in which the outer edge portion of the light source unit support 3 is locally cut out. The number of the fixing portions 3a is the same as the number of the light source units 2 (three in the first embodiment). The plurality of fixing portions 3a are arranged at equal intervals in the circumferential direction around the device central axis.

  The light source unit 2 includes a light source substrate 2a, a light emitting element 2b provided on one surface side (front surface side) of the light source substrate 2a, and a heat sink 2c provided on the other surface side (back surface side) of the light source substrate 2a. The light source substrate 2a is parallel to the apparatus central axis. The length of the light source unit 2 in the direction parallel to the apparatus central axis is longer than the length in the direction perpendicular to the apparatus central axis and parallel to the light source substrate 2a. That is, the light source unit 2 has a shape whose longitudinal direction is a direction parallel to the central axis of the apparatus. The shape of the light source unit 2 of the first embodiment is substantially rectangular when viewed from the direction perpendicular to the light source substrate 2a.

  The light source substrate 2a may be an organic material substrate or a ceramic substrate, but is preferably composed of a metal substrate such as aluminum or iron. By configuring the light source substrate 2a with a metal substrate, it is possible to improve heat dissipation and improve durability against vibration. In order to suppress light loss, surface resist treatment may be performed on the surface of the light source substrate 2a with a white paint or the like.

  The light emitting element 2b according to the first embodiment is an LED (Light Emitting Diode) light source. For example, a surface-mount type small LED package of 1 W to several W class can be used as the light emitting element 2b. A plurality of light emitting elements 2b are mounted on the light source substrate 2a.

  The heat sink 2c has a flat plate-shaped heat transfer portion 2e having a mounting surface for mounting the light source substrate 2a, and a plurality of fins 2f protruding from the surface of the heat transfer portion 2e opposite to the mounting surface. The shape of the fin 2f in the first embodiment is a plate shape extending along the longitudinal direction of the light source unit 2, but the fin of the heat sink 2c is not limited to a plate shape. For example, a pin fin (pin Mold fins). The back surface of the light source substrate 2a is in contact with one side of the heat transfer unit 2e (the side opposite to the fins 2f). The heat of the light emitting element 2b is transmitted from the light source substrate 2a to the heat transfer section 2e and further transferred to the fin 2f. This heat is dissipated from the surface of the fin 2f into the air by radiation, convection heat transfer, or the like. By providing the heat sink 2c, the temperature of the light emitting element 2b is lowered, and the light emission efficiency can be improved and the life can be extended. The light source substrate 2a and the heat transfer part 2e of the heat sink 2c may be provided integrally.

  The light emitting element used by the light source unit 2 in the present invention is not limited to the illustrated configuration. For example, a COB (Chip on Board) type LED light source having a large luminous flux of several thousand to several tens of thousands of lm / piece may be used as the light emitting element. The COB type LED light source has a structure in which a plurality of LED bare chips are directly mounted on a heat radiating substrate such as a metal substrate or a ceramic substrate and resin-sealed. When a COB type LED light source is used, the COB type LED light source may be directly attached to the attachment surface of the heat transfer portion 2e of the heat sink 2c. In addition, the light source unit 2 in the present invention is not limited to an LED light source, and an organic EL (Electro-Luminescence) light source or the like may be used as a light emitting element.

  The contact surface between the heat transfer part 2e of the heat sink 2c and the light source substrate 2a is parallel to the central axis of the apparatus. In the first embodiment, in the light source unit 2, the direction in which the light emitted from the light emitting element 2b travels is a direction perpendicular to the contact surface between the heat transfer portion 2e of the heat sink 2c and the light source substrate 2a. It shall be referred to as “light irradiation direction”. In the first embodiment, the light irradiation direction of the light source unit 2 is perpendicular to the central axis of the apparatus.

  The light source unit 2 further includes a support portion 2d, a fitting portion 2g, a flange portion 2h, a screw 2i, and an arm portion 2j. The support portion 2d has a rod shape and protrudes from one end in the longitudinal direction of the light source unit 2 in a direction parallel to the central axis of the apparatus. The fitting part 2g is formed at the tip of the support part 2d in the protruding direction. The fitting portion 2g has a shape that can be fitted inside the concave portion of the fixing portion 3a of the light source unit support 3. The flange portion 2h protrudes in a hook shape radially outward from the outer periphery of the boundary portion between the support portion 2d and the fitting portion 2g. The outer diameter of the flange portion 2h is larger than the concave portion of the fixed portion 3a. When the flange portion 2h contacts the light source unit support 3 at the edge of the concave portion of the fixed portion 3a, the light source unit 2 can be positioned in a direction parallel to the central axis of the apparatus. The screw 2i is attached to a screw hole (not shown) formed in the end face of the fitting portion 2g. By tightening the screw 2i with the fitting portion 2g fitted inside the concave portion of the fixed portion 3a, the head of the screw 2i and the flange portion 2h sandwich the light source unit support 3 at the edge of the concave portion of the fixed portion 3a. The light source unit 2 can be fixed to the light source unit support 3. By loosening the screw 2i, the light source unit 2 and the light source unit support 3 can be released from being fixed. By releasing the fixing as described above, the fitting portion 2g can be taken out from the concave portion of the fixing portion 3a like the light source unit 2 on the near side in FIG.

  The arm portions 2j are provided on one end side and the other end side in the longitudinal direction of the light source unit 2, respectively. The arm portions 2j are provided on one end side and the other end side in the direction perpendicular to the longitudinal direction of the light source unit 2, respectively. The light source unit 2 has a total of four arm portions 2j. The base portion of the arm portion 2j is fixed or integrated with the heat transfer portion 2e of the heat sink 2c. The arm portion 2j protrudes in a direction perpendicular to the center axis of the apparatus and in an oblique direction with respect to the contact surface between the heat transfer portion 2e of the heat sink 2c and the light source substrate 2a. The arm 2j protrudes in an oblique direction with respect to the light irradiation direction of the light source unit 2. The angle between the light irradiation direction of the light source unit 2 and the direction in which the arm portion 2j projects is an obtuse angle. The arm 2j protrudes in a direction away from the center of the light source unit 2.

  The base 5 is fixed to the base 4. The base portion 5 has a substantially columnar shape or a substantially cylindrical shape whose central axis coincides with the apparatus central axis. The entire rotating part 6 is rotatably connected to the base part 5. The entire rotating unit 6 is rotatable with respect to the base 5 around the apparatus central axis. The entire rotating unit 6 has a substantially columnar shape or a substantially cylindrical shape whose central axis coincides with the apparatus central axis. The outer diameter of the entire rotating part 6 is smaller than the outer diameter of the base part 5. The entire rotating unit 6 is fixed or integrated with the light source unit support 3. The light source unit support 3 is integrated with the entire rotation unit 6 and rotates with respect to the base 4 and the base 5. By rotating the entire rotating unit 6 with respect to the base 4 and the base 5, the light source unit support 3 rotates with respect to the base 4 and the base 5 around the apparatus central axis.

  The connecting portion 7 connects the arm portions 2j of the adjacent light source units 2 to each other. As shown in FIG. 4, the connecting portion 7 includes a hole 7a formed near the tip of the arm 2j, a shaft 7b that can be inserted into the hole 7a, and a head 7c that is integrally formed on one end side of the shaft 7b. And a screw 7d attached to a screw hole formed on the end face of the other end of the shaft 7b. The center lines of the hole 7a and the shaft 7b are parallel to the device central axis. The hole 7a near the tip of the arm 2j of one light source unit 2 connected by the connecting part 7 and the hole 7a near the tip of the arm 2j of the other light source unit 2 are overlapped, and the overlapped hole 7a. The shaft 7b is inserted into and a screw 7d is attached. In this state, the screws 7d are tightened, and the arm portions 2j of both light source units 2 are sandwiched between the head 7c of the shaft 7b and the heads of the screws 7d, so that both the light source units 2 can be connected and fixed. 4 shows the connecting portion 7 on one end side in the longitudinal direction of the light source unit 2, the connecting portion 7 on the other end side in the longitudinal direction of the light source unit 2 has the same configuration.

  The positional relationship between the light source units 2 connected via the connecting portion 7 is such that one light source unit 2 is rotated relative to the other light source unit 2 around a straight line parallel to the central axis of the apparatus. The positional relationship can be changed. The positional relationship between the light source units 2 connected via the connecting portion 7 is another positional relationship in which one light source unit 2 is rotated relative to the other light source unit 2 around the connecting portion 7. Can be changed.

  The cross-sectional shape of the hole 7a and the shaft 7b of the connecting portion 7 shown in FIG. 4 is circular. With the shaft 7b inserted into the holes 7a of the arm portions 2j of both the light source units 2 connected by the connecting portion 7, the one light source unit 2 is moved around the connecting portion 7 only by loosening the screw 7d. The light source unit 2 can be rotated relatively. After rotating in this manner, both the light source units 2 can be connected and fixed again by the connecting portion 7 by tightening the screw 7d at an arbitrary position. According to the connection part 7 shown in FIG. 4, the angle of the other light source unit 2 with respect to one light source unit 2 connected can be continuously adjusted by doing as mentioned above.

  The cross-sectional shape of the hole 7a and the shaft 7b of the connecting portion 7 of another configuration example shown in FIG. 5 is a regular hexagon. The screw 7d of the connecting portion 7 is removed, the shaft 7b is removed from at least one of the holes 7a of the arm portions 2j of both light source units 2, and one light source unit 2 is connected to the other light source unit 2 with the connecting portion 7 as the center. The shaft 7b can be reinserted into the hole 7a after being relatively rotated by a multiple of 60 °. Thus, after rotating and moving and re-inserting the shaft 7b into the hole 7a, both the light source units 2 can be connected and fixed again by the connecting portion 7 by attaching and tightening the screws 7d. In this way, according to the connecting portion 7 shown in FIG. 5, the angle of the other light source unit 2 with respect to the connected light source unit 2 can be selectively fixed at an angle of 60 °.

  In the first embodiment, the above-described configuration of the connecting portion 7 of FIG. 5 is an angle fixing unit that selectively fixes the angle of the other light source unit 2 with respect to the one light source unit 2 to be connected to a plurality of angles. Equivalent to. In the present invention, the configuration of the angle fixing means is not limited to the above-described configuration, and can be replaced with any configuration that can exhibit the same function. In the configuration described with reference to FIG. 5, the cross-sectional shapes of the hole 7a and the shaft 7b are replaced with regular hexagons (eg, N = 7, 8, 9, 10, 11, 12, 13, 14) instead of regular hexagons. Etc.), the angle of the other light source unit 2 with respect to the connected one light source unit 2 can be selectively fixed at an angle of (360 / N) °.

  As shown in FIGS. 4 and 5, the arm portion 2j provided on one end side in the direction perpendicular to the longitudinal direction of the light source unit 2 and the other end side in the direction perpendicular to the longitudinal direction of the light source unit 2 are provided. The arm portion 2j is provided at a position slightly shifted with respect to the direction parallel to the central axis of the apparatus. The magnitude of the deviation corresponds to the thickness of the arm 2j in the direction parallel to the central axis of the apparatus. By configuring in this way, in a state where the arm portion 2j of one light source unit 2 connected by the connecting portion 7 and the arm portion 2j of the other light source unit 2 are overlapped in a direction parallel to the apparatus central axis, The positions of the light source substrate 2a and the heat sink 2c of one light source unit 2 and the positions of the light source substrate 2a and the heat sink 2c of the other light source unit 2 can be completely matched with respect to a direction parallel to the central axis of the apparatus. Moreover, in all the light source units 2 with which the light-emitting device 1A is equipped, the attachment position of the arm part 2j can be made common. For this reason, it is not necessary to prepare a plurality of types of light source units 2 having different attachment positions of the arm portions 2j, and the parts can be shared.

1 A of light-emitting devices can change the arrangement state of the three light source units 2 into the 1st use state shown in FIG. 1, and the 2nd use state shown in FIG. The light emitting device 1A of the first embodiment can be changed from the first use state to the second use state by the following procedure.
(1) The connection of the connecting portion 7 for connecting the two light source units 2 is removed by removing the screw 7d of the connecting portion 7 for connecting the two light source units on the right side in FIG. To release.
(2) Loosening the screws 2i of the two light source units 2 releases the fixation between the two light source units 2 and the light source unit support 3. The two light source units 2 are hereinafter referred to as a movable side light source unit 2. The other light source unit 2 (light source unit 2 on the left side in FIG. 1) that has not been fixed to the light source unit support 3 is hereinafter referred to as a fixed-side light source unit 2.
(3) The positional relationship between the light source unit 2 on the fixed side and the light source unit 2 on the movable side is changed by the connecting portion 7 between them. That is, the positional relationship between the fixed-side light source unit 2 and the movable-side light source unit 2 is different from that obtained by rotating the movable-side light source unit 2 with respect to the fixed-side light source unit 2 around the connecting portion 7. Change to positional relationship. In this case, the positional relationship between the two is changed so that the light irradiation direction of the movable light source unit 2 approaches the light irradiation direction of the fixed light source unit 2. In such a state where the positional relationship is changed, the movable light source unit 2 and the fixed light source unit 2 are connected and fixed again by the connecting portion 7.

  The light emitting device 1A of the first embodiment can be changed from the second use state to the first use state by a procedure reverse to the above. In the first use state shown in FIG. 1, the light irradiation directions from the three light source units 2 are radial when viewed from a direction parallel to the central axis of the apparatus. In the first use state, the three light source units 2 are arranged at substantially equal angular intervals (120 ° intervals in the first embodiment) around the central axis of the apparatus. In the first embodiment, when viewed from the direction parallel to the center axis of the apparatus, the light irradiation directions from the three light source units 2 are substantially equiangularly spaced from the center in the first use state (this embodiment 1 spreads radially in three directions at intervals of 120 °. In the first use state, the light-emitting device 1 </ b> A can distribute light to the entire circumference surrounding the device central axis. For example, in an application in which the light emitting device 1A is installed in a posture in which the central axis of the device is a vertical direction, the first use state that allows light distribution to the entire periphery is suitable. In the first use state, an air path 10 through which air for cooling the heat sink 2c can pass is formed between the adjacent light source units 2 (between adjacent heat sinks 2c). When air passes through the air passage 10, heat can be dissipated more efficiently from the heat sink 2c, and an excellent cooling effect can be obtained. Since the light source unit 2 has the arm portion 2j, the air passage 10 can be formed. In the first embodiment, since there is no structure that obstructs the air flow in the space surrounded by the heat sinks 2c of the three light source units 2, it is possible to apply wind to the heat sink 2c more efficiently, which is particularly excellent. A cooling effect can be obtained.

  In the second use state shown in FIG. 2, when viewed from a direction parallel to the central axis of the apparatus, the light irradiation directions from the three light source units 2 are shifted from the first use state. In the second use state, the light emitting device 1A can distribute light to a part of the circumference surrounding the device central axis. For example, when the light-emitting device 1A is used by being attached to an appliance such as a street light, as shown in FIG. 3, light is emitted in a posture in which the device central axis is horizontal or in a posture in which the device central axis is nearly horizontal. The apparatus 1A may be installed. In such a use, it becomes possible to illuminate the lower part intensively by setting the second use state.

  As described above, according to the light emitting device 1A, both the first usage state in which light is distributed around the entire center axis of the device and the second usage state in which light is distributed on a part of the periphery of the central axis of the device can be handled. . For this reason, since one type of light-emitting device 1A can respond to various uses, cost can be suppressed.

  In the second use state, the air passage 12 formed between the light source units 2 connected by the connecting portion 7 (between the heat sinks 2c) is narrower than the air passage 10 in the first use state. Become. In the second use state, the air passage 11 formed between the pair of light source units 2 in which the connection of the connecting portion 7 is released is significantly enlarged as compared with the air passage 10 in the first use state. In the second use state, when a large amount of air enters from the large air passage 11, heat can be efficiently dissipated from the heat sink 2c of each light source unit 2, and an excellent cooling effect can be obtained. Therefore, even if the air path 12 formed between the light source units 2 connected by the connecting portion 7 is narrow, the cooling effect does not deteriorate. The air passage 12 formed between the light source units 2 connected by the connecting portion 7 in the second use state is narrower than the air passage 10 in the first use state, so that the second Since the interval between the light source units 2 connected by the connecting portion 7 in the use state (interval between the heat sinks 2c) can be reduced, the outer shape of the light emitting device 1A in the second use state can be reduced.

  As shown in FIGS. 2 and 3, in the second use state, when viewed from the direction parallel to the central axis of the apparatus, the light irradiation direction from the three light source units 2 has a sector shape with a central angle of 180 ° or less. Within the range of. In this way, by making the light irradiation direction from each light source unit 2 in the second use state fall within a fan-shaped range with a central angle of 180 ° or less, the light distribution in the second use state can be achieved. You can concentrate well in a specific direction.

  In the second use state, the light source unit 2 on the movable side is arranged such that the light irradiation direction of the light source unit 2 on the movable side is closer to the light irradiation direction of the light source unit 2 on the fixed side than in the state of FIGS. The heat sink 2c may be close to the heat sink 2c of the light source unit 2 on the fixed side. In that case, the air path 12 formed between the heat sink 2c of the movable light source unit 2 and the heat sink 2c of the fixed light source unit 2 may be substantially lost. Even if the air path 12 substantially disappears, heat can be efficiently dissipated from the heat sink 2c of each light source unit 2 by entering a large amount of air from the large air path 11, and a sufficient cooling effect can be obtained. .

  When the connecting portion 7 shown in FIG. 4 is used, the angle of the other light source unit 2 with respect to the connected one light source unit 2 can be continuously adjusted. The degree of freedom of adjustment can be increased. When the connecting portion 7 shown in FIG. 5 is used, the position of the light source unit 2 can be easily positioned at an appropriate position when changing from the first use state to the second use state or vice versa.

  In the first embodiment, all the light source units 2 supported by the light source unit support 3 are rotated around the central axis of the apparatus as a whole by rotating the entire rotating unit 6 with respect to the base 4 and the base 5. Can be made. It is difficult to predict the rotational position where the base 4 stops when the base 4 is screwed into the socket of the target instrument. After the base 4 is screwed into the socket and the light emitting device 1A is mounted, the entire rotating unit 6 is rotated to rotate all the light source units 2 around the central axis of the device so that the orientation of the light source unit 2 is optimum. Can be adjusted in any direction. In particular, when the light emitting device 1A is used in the second use state, the direction in which the light distribution concentrates at the position where the base 4 screwed into the socket stops may not be a desired direction (for example, downward). In such a case, it is possible to easily adjust the direction in which the light distribution is concentrated to a desired direction by rotating the entire rotating unit 6.

  The rotational position of the entire rotating unit 6 relative to the base 5 can be fixed at an arbitrary position by the frictional force of the sliding surface (not shown) between the base 5 and the entire rotating unit 6. By applying a torque exceeding the torque corresponding to the frictional force to the entire rotating unit 6, the entire rotating unit 6 can be rotated with respect to the base 5.

  Instead of the configuration described above, a fixing means (not shown) such as a screw for fixing the rotational position of the entire rotating portion 6 with respect to the base 5 is provided, and the entire rotating portion 6 is attached to the base 5 by loosening the fastening of the fixing means. The rotation position of the entire rotation part 6 relative to the base part 5 may be fixed again by tightening the fixing means again.

  One light source unit 2 among all the light source units 2 included in the light emitting device 1A may be fixed to the light source unit support 3 so as not to be detached without the fitting portion 2g and the fixing portion 3a. . For example, one light source unit 2 located on the left side in FIG. 1 may be completely fixed to the light source unit support 3 without using the fitting portion 2g and the fixing portion 3a. When one light source unit 2 is fixed to the light source unit support 3 so as not to be detached, the strength of attaching the light source unit 2 to the light source unit support 3 can be improved and the structure can be simplified.

  The light source unit 2 may include a light-transmitting cover member (not shown) that covers the light source substrate 2a and the light emitting element 2b. This cover member is waterproof (moisture-proof) and desirably covers the light source substrate 2a and the light emitting element 2b so as to be sealed from the outside air. As a constituent material of the cover member, for example, a plastic material such as polycarbonate or a glass material is preferable. By providing such a cover member, the environmental resistance of the light-emitting device 1A can be improved, and the light-emitting device 1A can be preferably used for an appliance installed outdoors.

  Although the first embodiment of the present invention has been described above, the application target of the light emitting device of the present invention is not limited to a lamp having a base, such as the light emitting device 1A of the first embodiment. The light emitting device of the present invention can be applied to various lighting fixtures including, for example, a downlight, a high ceiling lighting, a projector, and the like.

1A light emitting device, 2 light source unit, 2a light source substrate, 2b light emitting element, 2c heat sink, 2d support part, 2e heat transfer part, 2f fin, 2g fitting part, 2h flange part, 2i screw, 2j arm part, 3 light source unit Support body, 3a fixing part, 4 base, 5 base part, 6 whole rotating part, 7 connecting part, 7a hole, 7b shaft, 7c head, 7d screw, 10, 11, 12

Claims (8)

Three or more light source units;
The adjacent light source units are connected to each other, and the positional relationship between the light source units is rotated relative to the other light source unit with respect to a straight line parallel to the center axis of the apparatus. A connecting portion that can be changed to another positional relationship,
With
When viewed from a direction parallel to the apparatus central axis, a first use state in which light irradiation directions from the three or more light source units are radial when viewed from a direction parallel to the apparatus central axis, and when viewed from a direction parallel to the apparatus central axis The arrangement state of the three or more light source units can be changed to the second use state in which the light irradiation direction from the three or more light source units is in a direction shifted compared to the first use state,
By changing the positional relationship between the light source units connected by the connecting portion, it can be changed to the first use state and the second use state,
At least in the first use state, a light emitting device in which an air path through which air for cooling the light source unit passes is formed between the adjacent light source units.   2. The light emitting device according to claim 1, further comprising an overall rotation unit capable of rotating the three or more light source units as a whole about the device central axis. A light source unit support that supports the three or more light source units;
The light-emitting device according to claim 1, wherein one of the light source units is fixed to the light source unit support body so as not to be removable. The light source unit has a protruding arm,
The light emitting device according to any one of claims 1 to 3, wherein the connecting portion connects the arm portions of the light source units adjacent to each other.   The light emitting device according to any one of claims 1 to 4, wherein the connecting portion is capable of continuously adjusting an angle of the other light source unit with respect to the one light source unit to be connected.   The said connection part has an angle fixing means which selectively fixes the angle of the other said light source unit with respect to one said light source unit connected to several angles. Light-emitting device.   The air path between the light source units connected by the connecting part in the first use state is the air path between the light source units connected by the connection part in the second use state. The light emitting device according to claim 1, which is larger than the light emitting device.   The light source device according to any one of claims 1 to 7, wherein the light source unit includes a light emitting element and a heat sink provided on a back surface side of the light emitting element.

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