Lamp

• US 9,097,391 B2
• Filed: 10/23/2012
• Issued: 08/04/2015
• Est. Priority Date: 11/09/2011
• Status: Active Grant

• Current Assignee: Iwasaki Electric Company Limited
• Original Assignee: EYE Lighting Systems Corp. (Iwasaki Electric Company Limited), Iwasaki Electric Company Limited
• Inventors: Mikami, Takahiro, Kimoto, Yuuichi, Baba, Nobuyuki, Imanari, Takayoshi
• Primary Examiner(s): Husar, Stephen F
• Application Number:
  US14/352,382
• Publication Number:
  US 20140328064A1
• Time in Patent Office: 1,015 Days
• Field of Search: 362/218, 36224902-24906, 362/294, 362/373
• US Class Current: 1/1
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21V 17/12 by screwing
• CPC Class Codes: F21V 17/164 the parts being subjected to bending, e.g. snap joints
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 23/002 Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
• CPC Class Codes: F21V 27/02 Cable inlets
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 31/00 Gas-tight or water-tight arrangements
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lamp achieves high output power like an HID lamp by using a light emitting element(s) as a light source. A mount board having LED mounted thereon is provided on the surface of a base member, and there are provided plural flat plate type light source units arranged around an axial line while the back surfaces thereof faces inwards, and a support member provided on the axial line. The plural light source units are supported on the support member, and a space through which air flows is provided at the back surface side of each base member.

Claims

1. A lamp including:

a plurality of flat plate type light source units arranged around an axial line while back surfaces thereof face inwards, each of the light source units having a mount board having a light emitting element mounted on the surface of a base member; and

a support member provided on the axial line, wherein

the plurality of light source units are supported on the support member while a gap is provided between the adjacent light source units,

a space through which air flows is provided at a back surface side of each base member, and

the support member has a storage body in which respective lead wires from the plurality of light source units are accommodated without being exposed to the space through which air flows, and the plurality of light source units are supported on the storage body.

2. The lamp according to claim 1, wherein one ends of the plurality of light source units are cantilevered to the periphery of the storage body.

3. The lamp according to claim 2, wherein

the other ends of the plurality of light source units are joined to one another by a joint member, and

the joint member is provided with an opening through which the space intercommunicates with the outside in the direction of the axial line.

4. The lamp according to claim 1, wherein the storage body is provided with a base.

5. The lamp according to claim 1, wherein

connectors are secured to the wires from the plurality of light source units, and

a board in which the connectors are inserted is provided in the storage body.

6. The lamp according to claim 1, wherein

the surface of the base member has a waterproof structure for waterproofing the mount board,

a lead-out hole for leading out the lead wires is provided to the back surface of the base member, the support member has a lead-in hole for leading the lead wires from the lead-out hole into the support member,

the light source unit and the support member are brought into close contact with each other to waterproof the lead-out hole and the lead-in hole, and

the respective lead wires accommodated in the storage body are waterproofed by blocking the storage body.

7. The lamp according to claim 1, wherein

the storage body is provided with a base, and

the storage body is blocked by the base.

8. The lamp according to claim 6, wherein the storage body is provided with the lead-in hole.

9. The lamp according to claim 1, wherein the light source unit has a waterproof cover which covers the mount board.

10. The lamp according to claim 1, wherein the back surface of the base member is provided with a plurality of heat radiation fins.

11. The lamp according to claim 1, wherein

the support member has a column extending from the storage body, one ends of the plurality of light source units are supported on the storage body, and

the other ends thereof are supported on the tip of the column.

12. The lamp according to claim 11, wherein the support member is provided with a plurality of heat radiation fins.

13. The lamp according to claim 11, wherein

the support member is provided with projecting portions, and

the light source units are supported on the projecting portions.

14. The lamp according to claim 13, wherein

the projecting portions extend in a longitudinal direction of the support member, and

the back surfaces of the base members are in contact with the projecting portions.

15. The lamp according to claim 13, wherein each of the projecting portions is configured so that a center portion thereof is higher than both the end portions thereof in the longitudinal direction of the support member.

16. The lamp according to claim 13, wherein

the projecting portions are radially provided to the support member,

a plurality of support members which are different in number of the projecting portions are prepared,

the plurality of light source units have the same shape, and

the output power of the lamp is changeable by changing the number of light source units to be secured to the support member.

17. The lamp according to claim 7, wherein the storage body is provided with the lead-in hole.