JP2013149363A - Lamp and its housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp with an excellent heat radiation effect, and its housing.SOLUTION: A lamp includes a housing having a first end face, a second end face opposite to the first end face, and a connection face for connecting the first end face and the second end face, a light source located at the first end face of the housing and connected with the housing in a thermally conductive state, and an electric connection section connected with the second end face of the housing and electrically connected with the light source. The housing has a heat radiation passage as a through-hole wherein a circumference is closed, and the heat radiation passage is extended along a direction faced from the first end face to the second end face in order to accelerate convection and circulation of air.

Description

  The present invention relates to a lamp and its housing.

  Usually, the lamp housing is made of a metal, for example, a material having a high thermal conductivity such as copper, aluminum or an alloy thereof. The metal housing is manufactured by casting, and in order to achieve an excellent heat dissipation effect, a plurality of heat dissipation fins having an uneven surface are provided to increase the surface area of the housing.

  However, once the air flows through the heat dissipating fins, it does not circulate again, and the heat dissipating effect is not ideal.

  The objective of this invention is providing the lamp | ramp which solves the said subject and has the outstanding heat dissipation effect, and its housing.

  A lamp housing according to the present invention has a first end face, a second end face facing the first end face, a connection face connecting the first end face and the second end face, and the housing is closed at the periphery. A heat radiating passage that is a through hole is provided, and the heat radiating passage extends along a direction from the first end face toward the second end face to promote air convection and circulation.

  A lamp according to the present invention is located on a first end surface, a second end surface facing the first end surface, a housing having a connection surface connecting the first end surface and the second end surface, and a first end surface of the housing. And a light source connected to the housing so as to conduct heat, and an electrical connection connected to the second end surface of the housing and electrically connected to the light source, the housing being closed at the periphery A heat dissipation passage that is a through hole is provided, and the heat dissipation passage extends along a direction from the first end face toward the second end face to promote air convection and circulation.

  Since the heat dissipation passage is formed in the housing of the lamp of the present invention, convection can be promoted by the chimney effect, and an excellent heat dissipation effect is achieved by effectively utilizing the flow of air.

It is sectional drawing of the lamp | ramp which concerns on 1st embodiment of this invention. It is a perspective view of the housing of the lamp concerning a first embodiment of the present invention. It is sectional drawing of the lamp | ramp which concerns on 2nd embodiment of this invention. It is a perspective view of the housing of the lamp | ramp which concerns on 2nd embodiment of this invention. It is sectional drawing of the lamp | ramp which concerns on 3rd embodiment of this invention.

  Referring to FIG. 1, the lamp 10 according to the first embodiment of the present invention includes a housing 11, a light source 12, a drive circuit 13, an electrical connection portion 14, and a lamp cover 15.

  Since the housing 11 is made of an aluminum magnesium alloy material, the weight of the entire lamp can be reduced, and the corrosion resistance of the aluminum magnesium alloy is strong, so that it is possible to overcome defects such as oxidation due to environmental humidity changes. In addition, since the aluminum magnesium alloy has a high thermal conductivity, heat from the light source 12 can be released. As shown in FIG. 2, the housing 11 has a substantially cylindrical shape, a first end surface 111 that is separated from the electrical connection portion 14, a second end surface 112 that is close to the electrical connection portion 14, and the first A circumferential surface 113 connecting the one end surface 111 and the second end surface 112. The area of the first end surface 111 is larger than the area of the second end surface 112.

  A recess 111 a is formed in the first end surface 111 of the housing 11. A housing portion 112 a is formed inside the housing 11, and the housing portion 112 a has an opening in the second end surface 112. The concave portion 111a and the accommodating portion 112a are communicated with each other by at least one through hole 112b provided in the bottom wall of the concave portion 111a. A plurality of heat radiating passages 114 are provided around the concave portion 111a and the housing portion 112a at intervals in the circumferential direction, and the heat radiating passages 114 are linear or curved through-holes whose periphery is closed. And extending along the direction from the first end surface 111 toward the second end surface 112 and orthogonal to the first end surface 111 and the second end surface 112, or the first end surface 111 and the second end surface 112 and a predetermined angle. In the present embodiment, the heat dissipation passage 114 is a linear through-hole extending along a direction parallel to the circumferential surface 113, and penetrates the first end surface 111 and the second end surface 112. Promote convection with a chimney effect. The heat dissipation passage 114 penetrates only a part of the housing 11, that is, an opening at one end of the heat dissipation passage 114 is provided in the first end surface 111 or the second end surface 112. An opening can be provided in the circumferential surface 113. In the present embodiment, the circumferential surface 113 is formed with a plurality of radiating fins 113a extending along the axial direction of the housing 11 at intervals in the circumferential direction. In other embodiments, The circumferential surface 113 may be a smooth surface without the radiation fins 113a being formed.

  The light source 12 is located in the recess 111a of the housing 11 and is connected to the housing 11 so as to be able to conduct heat. The light source 12 may be installed on the first end surface 111 of the housing 11. The light source 12 can be adhered to the housing 11 with a conductive adhesive such as silver paste, or the connection portion between the light source 12 and the housing 11 can be soldered and welded together. The light source 12 is coupled to the housing 11 by eutectic bonding. When using eutectic bonding, a metal such as Au, Sn, In, Al, Ag, Bi, Be, or an alloy thereof is used. In the present embodiment, the light source 12 is at least one light emitting diode.

  The drive circuit 13 is housed in the housing portion 112a of the housing 11 and is electrically connected to the light source 12 by a conductive wire penetrating the through hole 112b.

  The electrical connection portion 14 is fixed to the second end surface 112 of the housing 11 and is electrically connected to the drive circuit 13. The electrical connection 14 is a base used to supply electrical energy required for lamp operation such as E12, E14, E26, E27, GU10, PAR30, MR16, and the like.

  The lamp cover 15 is attached to the first end surface 111 of the housing 11 and covers the light source 12 accommodated in the recess 111a. The lamp cover 15 can have different shapes and different colors, thus can produce different shapes of light and different colors of light, and can realize a variety of different illumination effects.

  Referring to FIG. 3, the structure of the lamp 20 according to the second embodiment of the present invention is similar to the structure of the lamp 10 according to the first embodiment, but the housing 21 of the lamp 20 according to the present embodiment is electrically A first cylindrical portion 21a that is separated from the connecting portion 24 and a second cylindrical portion 21b that is close to the electrical connecting portion 24 are provided, and the diameter of the first cylindrical portion 21a is larger than the diameter of the second cylindrical portion 21b. As shown in FIG. 4, the first cylindrical portion 21 a is provided with a plurality of heat radiation passages 214 that penetrate through both ends of the first cylindrical portion 21 a. A plurality of heat radiating fins are formed on the circumferential surface 213.

Referring to FIG. 5, the structure of the lamp 30 according to the third embodiment of the present invention is similar to the structure of the lamp 10 according to the first embodiment, but the material of the housing 31 of the lamp 30 according to the present embodiment is as follows. Ceramic is used, and includes any one of Si ₃ N ₄ , SiC, ZrO ₂ , B ₄ C, TiB ₂ , Al _x O _y , AlN, BeO, and Sialon, or any two of them It can contain seeds or a mixture of different types. The housing 31 of the lamp 30 is provided with a recess 311a used for accommodating the light source 32. The lamp 30 can be operated with an alternating current, and two conductors pass through the through hole 312b to directly connect the light source 32 and the electrical connection portion 34 electrically. The structure of the lamp 30 is simple, small and lightweight.

  Since the heat dissipation passage is formed in the housing of the lamp of the present invention, convection can be promoted by the chimney effect, and an excellent heat dissipation effect is achieved by effectively utilizing the flow of air.

  Although the present invention has been specifically described above based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. Of course, the technical scope of the present invention is defined by the following claims.

10, 20, 30 Lamp 11, 21, 31 Housing 12, 32 Light source 13 Drive circuit 14, 24, 34 Electrical connection 15 Lamp cover 21a First cylindrical portion 21b Second cylindrical portion 111 First end surface 111a, 311a Concave portion 112 First Two end surfaces 112a Housing portions 112b and 312b Through holes 113 and 213 Connection surface (circumferential surface)
113a Heat radiation fins 114, 214 Heat radiation passage

Claims (5)

A housing having a first end surface, a second end surface facing the first end surface, a connection surface connecting the first end surface and the second end surface;
The housing is provided with a heat dissipation passage which is a through hole whose periphery is closed, and the heat dissipation passage extends along a direction from the first end surface toward the second end surface to convection and circulate air. Promoting the lamp housing.   The lamp housing according to claim 1, wherein the heat dissipation passage passes through the first end surface and the second end surface.   2. The lamp according to claim 1, wherein an opening at one end of the heat dissipation passage is provided in the first end surface or the second end surface, and an opening at the other end of the heat dissipation passage is provided in the connection surface. Housing.   2. The lamp housing according to claim 1, wherein the housing includes two cylindrical portions having different diameters, and the heat radiation passage passes through both ends of the cylindrical portion having a large diameter. A housing having a first end surface, a second end surface facing the first end surface, a connection surface connecting the first end surface and the second end surface;
A light source located on the first end surface of the housing and connected to the housing in a heat conductive manner;
An electrical connection connected to the second end surface of the housing and electrically connected to the light source;
A lamp comprising:
The housing is provided with a heat dissipation passage which is a through hole whose periphery is closed, and the heat dissipation passage extends along a direction from the first end surface toward the second end surface to convection and circulate air. A lamp characterized by promoting.