JP2016058139A - 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 support column 3, and three or more light source units 2 attached to the support column 3. The center line of the support column 3 is a device center axis. The arrangement state of the three or more light source units 2 can be changed to a first use sate in which a light radiation direction from the three or more light source units 3 is in a radial state in a view from a direction parallel with the device center axis, 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 the view from the direction parallel with the device center axis. The attachment positions of all light source units 2 or light source units 2 other than one among the all light source units 2 to the support column 3 are changed to another positions obtained by rotating the light source units around the device center axis, and thereby the arrange state can be changed to the first use state and the second use state.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 includes a support column and three or more light source units attached to the support column, and the center line of the support column becomes the device central axis, and is viewed from a direction parallel to the device central axis. The first use state in which the light irradiation directions from three or more light source units are radial, and the light irradiation direction from three or more light source units to the first use state when viewed from a direction parallel to the central axis of the apparatus. The arrangement state of three or more light source units can be changed to the second use state in which the direction is deviated compared to all the light source units, or a light source unit other than one of all the light source units, By changing the mounting position of each of the columns to the other position where the light source unit is rotated around the center axis of the apparatus, the first use state and the second use state can be changed.

  According to the light emitting device of the present invention, the mounting position of each light source unit or a light source unit other than one of all the light source units with respect to each column is rotated around the device central axis. By changing to another moved position, it is possible to support 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 over a part of the periphery of the device central axis. It becomes.

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 the figure which looked at the light source unit and support | pillar of the light-emitting device shown in FIG. 1 from the direction parallel to an apparatus central axis. It is the figure which looked at the light source unit and support | pillar with which the modification of the light-emitting device of this Embodiment 1 is provided from the direction parallel to a device central axis. It is the figure which looked at the light source unit and support | pillar of the light-emitting device of this Embodiment 1 from the direction perpendicular | vertical to an apparatus central axis. It is the figure which looked at the light source unit and support | pillar with which the light-emitting device of Embodiment 2 of this invention is provided from the direction parallel to an apparatus central axis.

  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.
1 and 2 are perspective views showing a light-emitting device according to Embodiment 1 of the present invention. As shown in these drawings, the light-emitting device 1 </ b> A according to the first embodiment includes a light source unit 2, a support column 3, a base 4, a base portion 5, and an entire rotating portion 6. 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.

  The center line of the column 3 coincides with the center axis of the apparatus. The cross-sectional shape of the column 3 of the first embodiment is circular over almost the entire length of the column 3. Three light source units 2 included in the light emitting device 1 </ b> A are attached to the column 3. The three light source units 2 have substantially the same configuration.

  The light source unit 2 includes a light source substrate 2a, a light emitting element 2b provided on one side (front side) of the light source substrate 2a, a heat sink 2c provided on the other side (back side) of the light source substrate 2a, and a column 3 And a support portion 2d coupled to the. 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 support portion 2d protrudes from the back surface of the heat transfer portion 2e of the heat sink 2c toward the support column 3, and is connected to the support column 3. In the first embodiment, support portions 2d are provided on one end side and the other end side in the longitudinal direction of the light source unit 2, respectively. Each light source unit 2 is supported by the support column 3 via two support portions 2d. The attachment position of the support part 2d with respect to the support | pillar 3 can be changed into the other position which rotated the said support part 2d around the apparatus central axis. Thereby, the attachment position of each light source unit 2 with respect to the support | pillar 3 can be changed into the other position which rotated the said light source unit 2 centering on the apparatus center axis | shaft.

  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. One end side of the column 3 is fixed to the entire rotating unit 6. The support column 3 is integrated with the entire rotation unit 6 and rotates with respect to the base 4 and the base unit 5. By rotating the entire rotating portion 6 with respect to the base 4 and the base 5, the support column 3 rotates about the device central axis with respect to the base 4 and the base 5.

  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 includes all the light source units 2 (three light source units 2 in the first embodiment) or light source units 2 other than one of all the light source units 2 (two in the first embodiment). By changing the mounting position of each light source unit 2) to each support column 3 to another position where the light source unit 2 is rotationally moved around the center axis of the apparatus, the first use state and the second use state are obtained. It can be changed.

  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 passage 10 through which air for cooling the heat sink 2c can pass is formed between the adjacent light source units 2. 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.

  In FIG. 1, the mounting positions of the two light source units 2 other than the one light source unit 2 on the left side are rotated in the direction approaching the one light source unit 2 to change to the second use state shown in FIG. 2. be able to. In the second use state, 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 those in 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.

  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. For example, when the light emitting device 1A is mounted on an appliance such as a street light and used, the light emitting device 1A is installed in a posture where the device central axis is horizontal or in a posture where the device central axis is nearly horizontal. There is. 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, a large air passage 11 and a small air passage 12 are formed between the light source units 2. The large air passage 11 is one place, and the other places are small air passages 12. The large air passage 11 is larger than the air passage 10 in the first use state. The small air passage 12 is smaller than 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.

  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.

  4 is a view of the light source unit 2 and the column 3 of the light emitting device 1A shown in FIG. 1 as viewed from a direction parallel to the central axis of the device. In FIG. 4, the support | pillar 3 is shown in a cross section. As shown in FIG. 4, the support portion 2 d of the light source unit 2 has a hole 2 g through which the column 3 passes. The hole 2g is circular. The inner diameter of the hole 2g corresponds to the outer diameter of the column 3. The column 3 is fitted inside the hole 2g with almost no gap. The support portion 2 d can be fixed to the column 3 by the frictional force between the inner peripheral surface of the hole 2 g and the outer peripheral surface of the column 3. By applying torque exceeding the torque corresponding to the frictional force to the support portion 2d, the support portion 2d can be rotated with respect to the support column 3. The support 2d can be fixed to the support 3 again by the frictional force between the inner peripheral surface of the hole 2g and the outer peripheral surface of the support 3 at a position where the support 2d is rotated by an arbitrary angle with respect to the support 3. In the first embodiment, in this way, the mounting position of the support portion 2d with respect to the column 3 can be changed to another position in which the support portion 2d is rotated and moved by an arbitrary angle around the apparatus central axis. it can. Thereby, the attachment position of the light source unit 2 with respect to the support | pillar 3 can be changed into the other position which rotated the said light source unit 2 only by arbitrary angles centering | focusing on the apparatus central axis.

  According to the configuration described above, when the mounting position of the light source unit 2 with respect to the column 3 is changed to another position where the light source unit 2 is rotated around the center axis of the apparatus, the rotation angle is continuously adjusted. it can. For this reason, the freedom degree of adjustment of the attachment position of the light source unit 2 can be made high.

  Although not shown, instead of the configuration described above, a large-diameter portion that can fix the support portion 2d to the support column 3 by a frictional force between the inner peripheral surface of the hole 2g and the outer peripheral surface of the support column 3, and the large-diameter portion A small-diameter portion having a smaller outer diameter is provided on the support column 3, and the support portion 2d can be moved between the large-diameter portion and the small-diameter portion by shifting the position of the support portion 2d with respect to the support column 3 in the direction of the center axis of the apparatus. You may comprise. In this case, the position of the support portion 2d is moved from the large diameter portion of the support column 3 to the small diameter portion, the support portion 2d is rotated around the center axis of the apparatus, and then the support portion 2d is changed from the small diameter portion to the large diameter portion. By returning, the support portion 2d can be fixed to the support column 3 again at the position where the support portion 2d is rotated.

  Instead of the configuration described above, a fixing means (not shown) such as a screw for fixing the mounting position of the support portion 2d to the support column 3 is provided, and the support portion 2d rotates with respect to the support column 3 by loosening the fastening means. It becomes possible, and it may be configured such that the mounting position of the support portion 2d with respect to the column 3 can be fixed again by tightening the fixing means again.

  In the first embodiment, by rotating the entire rotating unit 6 with respect to the base 4 and the base 5, it is possible to rotate all the light source units 2 supported by the support column 3 as a whole about the apparatus central axis. it can. 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.

  FIG. 5 is a view of the light source unit 2 and the support column 3 provided in the modification of the light emitting device 1A of the first embodiment as seen from a direction parallel to the central axis of the device. In FIG. 5, the support | pillar 3 is shown in a cross section. As shown in FIG. 5, the support portion 2 d of the light source unit 2 in this modification has a hole 2 h through which the column 3 is passed. The shape of the hole 2h is a regular hexagon. The support column 3 has a first part 3a having a regular hexagonal cross-sectional shape corresponding to the regular hexagonal shape of the hole 2h, and a second part (not shown) having a circular sectional shape inscribed in the regular hexagon. In the longitudinal direction of the support column 3, the second part is formed at a position adjacent to the first part 3a. The first part 3a of the column 3 is fitted inside the hole 2h with almost no gap. The support portion 2d is fixed to the column 3 by a frictional force between the inner circumferential surface of the hole 2h and the outer circumferential surface of the first portion 3a of the column 3. By applying a force in the apparatus central axis direction exceeding the frictional force to the support portion 2d, the position of the support portion 2d is shifted from the first portion 3a having a regular hexagonal cross section to the second portion having a circular cross section. 3 can be rotated. At the position where the support portion 2d is rotated and moved by a multiple of 60 ° with respect to the support column 3, a force in the apparatus central axis direction is applied to the support portion 2d so that the position of the support portion 2d is changed from the second part of the circular cross section to the regular hexagonal cross section. By returning to the first portion 3a, the support portion 2d can be fixed to the support column 3 again. By doing in this way, in this modification, the attachment position of the light source unit 2 with respect to the support | pillar 3 can be changed into the other position which rotated the said light source unit 2 every 60 degrees centering on the apparatus central axis. For this reason, when changing from a 1st use state to a 2nd use state, or the reverse, the attachment position of the light source unit 2 can be easily positioned in an appropriate position.

  As described above, the configuration described with reference to FIG. 5 is configured so that the angle of the rotational movement of the light source unit 2 that can change the mounting position to another position rotated about the apparatus central axis with respect to the column 3 is set to a plurality of angles. This corresponds to an angle fixing means for selectively fixing. 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 shape of the hole 2 h of the support portion 2 d and the first portion 3 a of the support column 3 is a regular N-gon (for example, N = 7, 8, 9, 10) instead of a regular hexagon. 11, 11, 12, 13, 14, etc.), the mounting position of the light source unit 2 with respect to the column 3 can be positioned every (360 / N) °.

  FIG. 6 is a view of the light source unit 2 and the column 3 of the light emitting device 1A according to Embodiment 1 as viewed from a direction perpendicular to the central axis of the device. In FIG. 6, one of the three light source units 2 included in the light emitting device 1 </ b> A is not shown, and the other two light source units 2 are positioned 180 ° opposite to each other via the device central axis. The attached state is shown. The positions of the light source substrate 2a and the heat sink 2c of the left light source unit 2 in FIG. 6 and the positions of the light source substrate 2a and the heat sink 2c of the right light source unit 2 in FIG. Matches perfectly. Further, the positions of the light source substrate 2a and the heat sink 2c of another light source unit 2 not shown, and the positions of the light source substrate 2a and the heat sink 2c of the two light source units 2 in FIG. 6 are parallel to the central axis of the apparatus. There is a perfect match for any direction. In order to realize such a configuration, the positions of the support portions 2d of the three light source units 2 provided in the light emitting device 1A are little by little (in correspondence with the thickness of the support portion 2d) in the direction parallel to the central axis of the device. Is different. As a result, the support portions 2d of the three light source units 2 overlap each other in the vicinity of the support column 3, so that the positions of the support portions 2d are slightly different in the direction parallel to the central axis of the apparatus. The positions of the light source substrate 2a and the heat sink 2c can be completely matched with respect to the direction parallel to the central axis of the apparatus.

  In the first embodiment, the case where the number of the light source units 2 included in the light emitting device 1A is three has been described as an example. However, the number of the light source units included in the light emitting device of the present invention may be three or more. Four, five, six, seven, eight, nine, ten, etc. may be used. When the number of light source units included in the light emitting device is N, in the first use state, the light source units are preferably arranged at substantially equal angular intervals around the device central axis, that is, at intervals of (360 / N) °.

  One light source unit 2 among all the light source units 2 included in the light emitting device 1 </ b> A may be fixed to the column 3 so as not to be rotatable. For example, one light source unit 2 located on the left side in FIG. 1 may be completely fixed to the column 3. In this case, by changing the mounting position of the other two light source units 2 to a position close to the light source unit 2 that cannot rotate, the first use state as shown in FIG. Can be changed to the second use state. When one light source unit 2 is fixed to the column 3 so as not to be rotatable, the mounting strength of the light source unit 2 to the column 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.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIG. 7. The description will focus on the differences from the first embodiment described above, and the same or corresponding parts will be denoted by the same reference numerals. Is omitted. FIG. 7 is a view of the light source unit 2 and the support column 3 provided in the light emitting device 1B according to Embodiment 2 of the present invention, as viewed from a direction parallel to the central axis of the device. In FIG. 7, the support | pillar 3 is shown with a cross section. FIG. 7 shows the second use state.

  As shown in FIG. 7, among the three light source units 2 provided in the light emitting device 1B of the second embodiment, the support portion 2d of the one light source unit 2 located in the center in the second use state is It is longer than the support portions 2d of the other two light source units 2. For this reason, the distance between the light source part (light emitting element 2b) of one light source unit 2 located at the center in the second use state and the central axis of the apparatus is the light source part (light emission) of the other two light source units 2. Larger than the distance between the element 2b) and the central axis of the apparatus. In the second embodiment, by configuring in this way, the mounting positions of the left and right light source units 2 in FIG. 7 in the second use state are set to the central light source unit 2 as compared with the first embodiment. The position can be further closer to. As a result, in the second use state, the light irradiation directions from the three light source units 2 when viewed from the direction parallel to the central axis of the apparatus are in a fan-shaped range where the central angle is smaller than in the first embodiment. It will fit. That is, the light distribution in the second use state can be further concentrated as compared with the first embodiment.

  Although illustration is omitted, when the number of light source units 2 included in the light emitting device 1B is an even number (for example, four), the support portions 2d of the two light source units 2 positioned in the center in the second use state are provided. , It may be longer than the support portion 2d of the other light source unit 2. That is, the distance between the light source part (light emitting element 2b) of the two light source units 2 located in the center in the second use state and the central axis of the apparatus is set to the light source part (light emitting element 2b) of the other light source unit 2. You may enlarge compared with the distance with an apparatus central axis. By doing in this way, the effect similar to the above is acquired.

  As mentioned above, although embodiment of this invention was described, in this invention, it is possible to implement combining the characteristic of several embodiment mentioned above arbitrarily.

1A, 1B 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, 2h hole, 3 column, 3a first part, 4 base, 5 Base, 6 Overall rotating part, 10, 11, 12 Air path

Claims (7)

Struts,
Three or more light source units attached to the column;
With
The center line of the column becomes the center axis of the device,
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,
The mounting position of each of the light source units or the light source units other than one of the light source units with respect to the support column is the other of the light source units rotated around the device central axis. A light-emitting device that can be changed between the first use state and the second use state by changing the position.   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.   Of all the light source units, one of the light source units is fixed so as not to be able to rotate with respect to the column, and the other light source unit is another unit whose mounting position with respect to the column rotates about the apparatus central axis. The light-emitting device according to claim 1, wherein the light-emitting device is attached to the column so that the position can be changed.   The light source unit attached to the support column can continuously adjust the angle of the rotational movement so that the attachment position with respect to the support column can be changed to another position rotated and moved around the center axis of the apparatus. The light emitting device according to any one of claims 1 to 3.   The angle of the rotational movement of the light source unit attached to the column is selectively fixed to a plurality of angles so that the mounting position with respect to the column can be changed to another position rotated around the device central axis. The light-emitting device according to claim 1, further comprising an angle fixing unit.   The distance between the light source part of the one or two light source units located in the center in the second use state and the apparatus central axis is the distance between the light source part of the other light source unit and the apparatus central axis. 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 6, 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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