JP6498548B2 - Light emission device - Google Patents

Description

  The present invention relates to a light emitting device that emits light such as ultraviolet rays.

As this type of light emitting device, as shown in FIG. 3, a housing having an opening formed on one side surface, and a heat conduction plate having a back surface provided in parallel with the bottom plate of the housing in the housing, A light source and a reflecting mirror provided on the opening side of the housing on the surface of the heat conducting plate, the light from the light source is reflected toward the opening by the reflecting mirror, and is emitted from the opening is there.
A heat radiating member such as a heat sink is provided on the surface of the heat conducting plate on the side opposite to the opening of the housing in order to prevent the device from being damaged or the light source itself from being deteriorated by heat generated by the light source.

By the way, in such a light emitting device, when a control board for controlling the light source is provided in the housing, a light source, a reflecting member, a heat radiating member, and the like are disposed on the surface of the heat conducting plate. The substrate must be disposed on the back surface side of the heat conducting plate, that is, between the back surface of the heat conducting plate and the bottom plate of the housing.
Further, when the control board is arranged in this way, in order to connect the control board and the light source without difficulty using a cable, for example, as shown in FIG. Will be placed in.

However, in the conventional light emitting device provided so that the back surface of the heat conductive plate and the bottom plate of the housing are parallel to each other, when the back surface and the bottom plate are separated to ensure a space for arranging the control board. This causes a problem that the entire apparatus becomes larger in the thickness direction.
Further, since the connector is disposed on the opening side of the housing with respect to the light source, the emitted light is blocked by the connector and the cable, and there is a problem that the light from the light source cannot be used efficiently.

  Patent Document 1 discloses a configuration in which a heat radiating plate provided with a light source is bent and a part of the heat radiating plate is inclined with respect to the bottom plate of the housing. However, the arrangement of the control board is considered. It is not intended to make efficient use of light emitted from the light source.

JP 2012-28261 A

  Accordingly, the present invention has been made to solve the above problems all at once, and provides a light emitting device that is excellent in compactness and that can efficiently use light emitted from a light source. This is the main issue.

That is, the light emitting device according to the present invention includes a housing having one side opened, a heat conducting plate provided in the housing so that the surface intersects the thickness direction of the housing, and the surface of the heat conducting plate. A light source provided on the opening side of the housing in the housing, a heat dissipating member provided on the opposite side of the housing from the light source on the surface of the heat conducting plate, and light from the light source in the housing. It is the light emission apparatus which comprised the reflection member reflected toward the opening side of a body.
In this light emitting device, the surface of the heat conducting plate is provided so as to be inclined toward the opening side of the casing.

In such a light emitting device, since the heat conducting plate is inclined toward the opening side of the housing, the device is compact compared to the conventional configuration in which the heat conducting plate is provided in parallel with the bottom plate. The installation space for the control board can be secured on the back side of the heat conducting plate.
Furthermore, even if a cable that is electrically connected to the light source is connected to the light source from the opening side of the housing, the cable toward the opening is prevented from being blocked by the cable by tilting the heat conducting plate as described above. Therefore, the light emitted from the light source can be used more efficiently than in the past.
Note that if the light utilization efficiency is kept at the same level as before, the opening of the housing can be made smaller, and the device can be made more compact as much as possible so that the light going to the opening is not blocked by the cable. it can.

  As an embodiment in which the above-described effects of the present invention can be exhibited more remarkably, a control board is further provided that is accommodated on the back side of the heat conducting plate on the opposite side of the housing and controls the light source. Or a cable electrically connected to the light source, and the cable is disposed on the back side of the heat conducting plate in the casing and connected to the light source from the opening side of the casing. The structure which has been mentioned. The cable may be directly connected to the light source and the control board, or may be indirectly connected via an external control device or the like.

  In order to facilitate manufacture, it is preferable that the optical axis of the light source is set along a direction perpendicular to the surface.

Moreover, as the said heat conductive board, a flat plate type heat pipe is preferable and can improve heat dissipation performance more.
In addition, as a flat type heat pipe, what is called a vapor chamber is mentioned, for example. The vapor chamber is a device in which a working fluid is sealed in a sealed internal space, and heat is transported using heat of vaporization and condensation of the working fluid. Moreover, in this invention, the plate-shaped body provided with the several tubular body (heat pipe) arranged in parallel is also included as a flat plate-type heat pipe.

In order to efficiently cool the apparatus, the apparatus further includes a fan provided on a surface facing the one side surface, and an air intake port for taking air into the top plate of the housing on the opening side of the housing. It is preferable that the reflecting member is formed below the air suction port.
With such a configuration, air can be smoothly flowed toward the heat radiating member along the reflecting member, and it is difficult for the air to stay in the housing, thereby improving the cooling efficiency.

  According to the present invention configured as described above, the apparatus can be made compact while the control board is disposed in the housing, and the utilization efficiency of the light emitted from the light source can be improved as compared with the conventional case. .

The figure which shows the structure of the light-projection apparatus of this embodiment. Sectional drawing which shows the structure of the light emission apparatus of the embodiment. The schematic diagram which shows the structure of the conventional light emission apparatus.

  Hereinafter, an embodiment of a light emitting apparatus according to the present invention will be described with reference to the drawings.

  The light emitting device 100 according to the present embodiment emits light such as ultraviolet rays to irradiate a work or the like. Specifically, as shown in FIGS. 1 and 2, an opening for extracting light is used. 10a (hereinafter also referred to as a light extraction port 10a), a heat conduction plate 20 provided in the case 10 so as to face the bottom plate 11 of the case 10, and the heat conduction plate 20 The light source 30 and the heat radiating member 40 provided in the light source 30 and the reflection member 50 that reflects the light from the light source 30 toward the light extraction port 10a are provided.

  In the following, for convenience of explanation, as shown in FIG. 1, the thickness direction of the light emitting device 100 (the height direction from the bottom plate 11) is the vertical direction, the depth direction of the light emitting device 100 is the front-back direction, and the light emitting device 100 The width direction is defined as the left-right direction.

The housing 10 has, for example, a substantially rectangular parallelepiped shape that accommodates the heat conductive plate 20, the light source 30, the heat radiating member 40, and the reflecting member 50 described above. In this case, as shown in FIG. In addition, a long light extraction port 10a along the left-right direction is formed in the front surface 12 which is one side surface. Here, although the protective glass 10x is provided in the said light extraction opening | mouth 10a, installation of the protective glass 10x is arbitrary and does not necessarily need to provide. Further, a diffusion plate may be provided instead of the protective glass 10x.
In the case 10 of the present embodiment, one or a plurality of fans F are attached to a rear surface 13 facing the front surface 12, and an air suction port 10 b for taking air into the top plate 14 facing the bottom plate 11 is formed. Yes. With this configuration, the fan F sucks air from the air suction port 10b and discharges the air in the housing 10 to the outside so that the apparatus can be cooled.

The heat conductive plate 20 has front and back surfaces 21 and 22 and thermally connects the light source 30 and the heat radiating member 40 provided on the same surface, and transmits heat generated by the light source 30 to the heat radiating member 40. There is a flat plate-type heat pipe provided so that the surface 21 intersects the vertical direction. In addition, as shown in FIG. 2, the heat conducting plate 20 has a light source 30 laid on the opening 10 a side of the housing 10 on the surface 21, and a heat radiating member 40 on the opposite side of the housing 10 on the surface 21. ing.
The heat conduction plate 20 is constituted by a so-called vapor chamber, and transmits the heat generated by the light source 30 to the heat radiating member 40 side using the heat of vaporization and the heat of condensation of the working fluid sealed in the sealed internal space.

The light source 30 is laid on the surface 21 so that the optical axis is orthogonal to the surface 21 of the heat conducting plate 20. Here, the base 31, a circuit board 32 provided on the base 31, and a circuit This is a COB type LED light source having an LED chip 33 mounted on a substrate 32.
In the present embodiment, the plurality of light sources 30 are arranged on the opening 10a side of the housing 10 so as to be in close contact with each other along the opening 10a, that is, along the left-right direction. It is connected to the control board 60 via a cable L.

  More specifically, the cable L has one end connected to the light source side connector C1 provided on the circuit board 32 and the other end provided on the rear surface 13 of the housing 10. The power source is connected to the side connector C2, and power from an external power source (not shown) connected to the power source side connector C2 is supplied to each light source 30.

  As shown in FIG. 2, the control board 60 is placed on the bottom plate 11 on the side opposite to the opening of the housing 10, and is disposed between the back surface 22 of the heat conducting plate 20 and the bottom plate 11 of the housing 10. For example, an ON / OFF signal for controlling ON / OFF of each light source 30 and a light intensity signal for controlling the brightness of each light source 30 are transmitted to each light source 30 through the cable L as a control signal.

  The heat radiating member 40 is a heat sink provided so that one end thereof is positioned in the vicinity of the light source 30 and the other end is positioned in the vicinity of the fan F, that is, in the vicinity of the rear surface 13 of the housing 10. It consists of a number of fins formed along the direction.

The reflecting member 50 is a reflecting mirror such as a parabolic mirror that reflects the light emitted from the light source 30 toward the light extraction port 10 a, and is provided above the light source 30 so as to cover the light source 30. Yes.
More specifically, this is provided such that the base end portion is fixed to the base 31 of the light source 30 with a screw or the like, and the tip end portion is located above the upper end of the light extraction port 10a. In this embodiment, as shown in FIG. 2, it is arranged below the air inlet 10b described above. Thereby, the air sucked from the air suction port 10b can be smoothly flowed toward the heat radiating member 40 along the parabolic mirror which is the reflecting member 50, and the air is not easily retained in the housing 10. Thus, the cooling efficiency can be increased.

  In the present embodiment, as shown in FIG. 2, a second reflecting member 70 is provided so as to face the above-described reflecting member 50 and cover the light source side connector C1 and the cable L connected to the light source side connector C1. It has been. The second reflecting member 70 is, for example, a flat plate-like reflecting mirror, and the base end portion is located between the light source side connector C1 and the LED chip 33, and the tip end portion is lower than the lower end of the light extraction port 10a. It arrange | positions so that it may be located below.

  Thus, in the present embodiment, as shown in FIG. 2, the above-described heat conductive plate 20 is inclined toward the opening 10 a, so that the back opening 22 is closer to the opening 10 a than the bottom 10. It is tilted away.

  More specifically, as shown in FIG. 2, the heat conductive plate 20 of the present embodiment is inclined by a spacer member 80 provided between the heat conductive plate 20 and the bottom plate 11, for example. The spacer member 80 has a mounting surface 81 on which the heat conducting plate 20 is mounted via a flat base member B, for example, and the mounting surface 81 is at a predetermined angle with respect to the bottom plate 11. It is formed as an inclined surface.

  With this configuration, the heat conducting plate 20 is provided such that its planar direction is inclined toward the light extraction port 10a, that is, the optical axis of the light source 30 is inclined toward the light extraction port 10a. In other words, the heat conduction plate 20 has a separation distance h1 between the back surface 22 and the bottom plate 11 on the opening 10a side of the housing 10 and a separation distance h2 between the back surface 22 and the bottom plate 11 on the opposite side of the housing 10. It is tilted to be shorter.

  According to the light emitting device 100 of the present embodiment configured as described above, since the heat conductive plate 20 is inclined toward the opening 10a side of the housing 10, the heat conductive plate 20 is provided in parallel with the bottom plate 11. Compared to the configuration, the apparatus can be made compact, but a space for providing the control board 60 and the like between the back surface 22 and the bottom plate 11 can be secured.

  Further, by tilting the heat conducting plate 20 as described above, the position of the light source side connector C1 and the cable L in the housing 10 is closer to the bottom plate 11 side than the light source 30, so that the light source side connector C1 and the cable L block it. Therefore, the light from the light source 30 can be emitted to the outside, and the light use efficiency can be improved.

  In addition, the inclination of the heat conducting plate 20 can expand the light extraction port 10a in the vertical direction (the thickness direction of the apparatus) compared with the conventional one without changing the thickness dimension of the housing 10, and the light extraction area can be increased. Can be enlarged. This also increases the light utilization efficiency.

  In addition, a vapor chamber, which is a flat plate heat pipe, is used as the heat conducting plate 20, and the apparatus can be efficiently cooled while the apparatus is compact.

  In addition, since the second reflecting member 70 is provided to face the reflecting member 50, more light emitted from the light source 30 can be reflected toward the light extraction port 10a, and the light utilization efficiency can be improved. It can be improved further.

  The present invention is not limited to the above embodiment.

  For example, in the above-described embodiment, the heat conducting plate 20 is placed on the spacer member 80 and tilted. However, even if the heat conducting plate 20 is tilted by suspending the opposite side of the housing 10 from the top plate 14. good.

  In the embodiment, the light source 30 is provided so that the optical axis is perpendicular to the heat conducting plate 20, but the light axis may be provided so as to be inclined from the plane direction of the heat conducting plate 20. Further, the light source 30 is not limited to a COB type LED light source, and may be a bullet-type LED light source, a surface-mounted LED light source, or the like.

  In addition, the light emitted from the light emitting device 100 is not limited to ultraviolet light, and may be visible light or the like, and does not necessarily need to be linear light.

  In addition, the fan F may be attached to the left and right side surfaces, the top plate 14 or the bottom plate 11. The air inlet 10b may be formed on the left and right side surfaces, the bottom plate 11 or the rear surface 13. In addition, instead of the reflecting member 50 and the second reflecting member 70, a prism having these functions integrally may be used. Further, the cable L may be connected to the light source 30 by soldering such as manual soldering without using the light source side connector C1.

  In addition, the casing 10 of the above embodiment has a substantially rectangular parallelepiped shape, but the shape of the casing 10 can be variously changed, and for example, may not have the bottom plate 11 or the like. .

  In addition, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Light emission apparatus 10 ... Case 10a ... Light extraction port 20 ... Thermal conduction plate 30 ... Light source 40 ... Heat radiation member 50 ... Reflective member 60 ... Control board L ... Cable

Claims (6)

A housing with one side open;
A heat conducting plate provided in the housing such that the surface intersects the thickness direction of the housing;
A light source provided on the opening side of the housing on the surface of the heat conducting plate;
A heat dissipating member provided on the opposite side of the housing from the light source on the surface of the heat conducting plate;
A reflecting member that reflects light from the light source toward the opening side of the casing in the casing;
The light emission device, wherein the heat conduction plate is provided so that a surface thereof is inclined toward an opening side of the housing.   The light-emitting device according to claim 1, further comprising a control board that is housed on a back surface side of the heat conducting plate on a side opposite to the opening of the housing and controls the light source. Further comprising a cable electrically connected to the light source;
3. The light emitting device according to claim 1, wherein the cable is disposed on a back surface side of the heat conducting plate in the housing and is connected to the light source from an opening side of the housing.   4. The light emitting device according to claim 1, wherein an optical axis of the light source is set along a direction perpendicular to the surface. 5.   The light emitting device according to claim 1, wherein the heat conducting plate is a flat plate heat pipe. A fan provided on a surface facing the one side surface;
The air suction port for taking in air is formed in the top plate of the housing on the opening side of the housing, and the reflection member is disposed below the air suction port. The light emission apparatus as described in any one of Claims.