Illumination device including a light-emitting module fastened to mount member with a constant orientation

• US 8,449,154 B2
• Filed: 09/28/2010
• Issued: 05/28/2013
• Est. Priority Date: 09/30/2009
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Uemoto, Takaari, Ueda, Yasuyuki, Shuto, Mitsuko, Miki, Masahiro, Inoue, Makoto, Nagai, Hideo, Takahashi, Kenji, Saito, Takeshi
• Primary Examiner(s): Roy, Sikha
• Application Number:
  US13/144,681
• Publication Number:
  US 20110273895A1
• Time in Patent Office: 973 Days
• Field of Search: 362/430, 362/548
• US Class Current: 362/430
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 19/0055 by screwing
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A mount member (5) has a contact surface (27a) touching the bottom surface of an LED module (3) and protrusions (5a) protruding from the periphery of the contact surface (27a) in the thickness direction of the LED module (3) and regulating sliding motions thereof. A fixing member (6) made of a resilient, plate-like member comprises an opposing pair of flat portions (43) near the contact surface (27a) of the mount member (5) and flat tabs (44) projecting from the flat portions (43) toward the contact surface (27a) touching the upper surface of a substrate (17). The flat portions (43) of the fixing member (6) are fastened to be lower than the top surface of the substrate (17) of the LED module (3). Thus, elastically deformed areas extending from the fastened parts of the flat portions (43) through the flat tabs (44) press the substrate (17) into the mount member (5).

Claims

1. An illumination device including a light-emitting module having a substrate and a light-emitting unit mainly constituted by a light-emitting element on a central portion of a top surface of the substrate, the light-emitting module being fixed to a mount member by a pressing member, wherein

the mount member has a contact surface in contact with a bottom surface of the light-emitting module mounted thereon, and a regulating portion regulating sliding motions of the light-emitting module in protruding from near the contact surface along the thickness dimension of the light-emitting module,

the pressing member is made of a resilient plate-like member and comprises:

flat portions disposed in areas peripheral to the contact surface of the mount member; and

one or more flat tabs reaching from the flat portions toward the contact surface and coming into contact with the top surface of the substrate of the light-emitting module, and

the pressing member is fastened such that the flat portions come to be positioned lower than the top surface of the substrate of the light-emitting module, thereby causing each flat tab of the pressing member to press the light-emitting module due to forces applied by elastic deformation in a region extending from a fastened area of the flat portions to the flat tab.

2. The illumination device of claim 1, wherein

a top surface of the regulating portion of the mount member is lower than the top surface of the substrate, and

the flat portions of the pressing member are fastened to the top surface of the regulating portion.

3. The illumination device of claim 1, wherein

the flat portions are provided as an opposing pair sandwiching the light-emitting unit therebetween,

the flat tabs are individually provided on each of the flat portions, and

a total of two flat tabs are positioned so as to exhibit point symmetry about the center of the light-emitting unit.

4. The illumination device of claim 1, wherein

the light-emitting module has terminals electrically connected to the light-emitting element provided as an opposing pair at positions not facing the flat portions on the top surface of the substrate, and

the terminals are pressed toward the contact surface by the pressing member.

5. The illumination device of claim 4, wherein

the terminals of the light-emitting module are electrically connected to a connection terminal member disposed between the pressing member and the substrate of the light-emitting module, and

the connection terminal member is pressed toward the contact surface by the pressing member so as to press the terminals of the light-emitting modules.

6. The illumination device of claim 5, wherein

the pressing member has a projecting portion that projects between the connection terminal member and the light-emitting unit, and

an edge of the projecting portion projects to the substrate or to a vicinity thereof.