JP2010287547A - Light irradiating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light irradiating device capable of setting a light irradiating point near an object to be irradiated, capable of providing a sufficient number of LEDs and capable of radiating high-output light even in the case of providing a heat radiating member capable of sufficiently radiating the heat from the high-output LED by radially and densely providing LEDs relative to the object to be irradiated. <P>SOLUTION: The light irradiating device 100 includes radially provided line light irradiating units 10. The line light irradiating unit 10 includes: a light guide means 1 formed into a rectangular shape, from which the light entered from a base end surface 11 is radiated from the opposite tip surface 12; LEDs 2 provided on a line so that the irradiated light enters into the base end surface 11; a heat radiating member 3 provided on a base end surface side of the light guide means 1 and formed with a first heat radiating fin 33; and a light guide means-pinching member 4 for pinching the light guide means 1 from the heat radiating member 3. The light guide means pinching member 4 pinches a surface plate part 13 of the light guide means 1 over from the tip to the base end thereof in the tip part 41 thereof, and the base end part 42 is integrally connected to the heat radiating member 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a light irradiation apparatus for irradiating an irradiation target with high output light.

  In order to cure the photocurable resin, conventionally, ultraviolet light has been irradiated to the photocurable resin by a halogen lamp or the like. In recent years, it has been studied to use an LED having a higher efficiency and a longer life than a halogen lamp or the like for curing a photocurable resin.

  In order to cure the photocurable resin, it is necessary to make a high output LED capable of irradiating ultraviolet light as close as possible to the photocurable resin to be irradiated. For example, as shown in FIG. 5, it is conceivable that the LEDs 2 </ b> A are arranged densely in a radial manner and the photo-curing resin is cured by concentrating the ultraviolet rays at one point from the vicinity of the irradiation target W.

  However, since a high-current LED 2A capable of irradiating ultraviolet rays flows a large current, heat generation is increased accordingly, so in order to prevent failure and maintain a long life, for example, As shown in Patent Document 1, it is necessary to provide a heat dissipating member 3A having heat dissipating fins larger than usual on the mounting plate of the LED 2A.

  Then, since the heat radiating members 3A having a larger occupied volume than the LED 2A interfere with each other, the LED 2A and the heat radiating member 3A must be separated from the irradiation target W as shown in FIG. For this reason, the light emitted from the LED 2A spreads until reaching the irradiation target W, and the LED 2A is provided as close to the irradiation target W as possible for the original purpose, and high-power light is irradiated to one point. You will not be able to achieve your goal.

JP 2007-299682 A

  The present invention has been made in view of the above-described problems. Even if LEDs are provided radially to the irradiation target and a heat dissipation member capable of sufficiently dissipating heat from the high-power LEDs is provided, It is an object of the present invention to provide a light irradiating apparatus capable of setting an emission point in the vicinity of an irradiation target, installing a sufficient number of LEDs, and irradiating high output light.

  That is, the light irradiation apparatus of the present invention is a light irradiation apparatus in which a plurality of line light irradiation units that irradiate line light are provided radially so that their optical axis surfaces intersect on a straight line on the irradiation target. The line light irradiating unit includes a light guide means having a rectangular shape in which light incident from the base end surface is emitted from a front end surface facing the base end surface, and a straight line so that the emitted light is incident on the base end surface. An LED provided on a line, a heat dissipating member provided on the base end face side of the light guide means, and a first heat dissipating fin formed thereon, a light guide means holding member for holding the light guide means from the heat dissipating member, The light guide means clamping member sandwiches from the front end to the base end of the face plate portion of the light guide means at the front end portion, and the base end portion is integrally connected to the heat radiating member. It is characterized by that.

  If it is such, since the light inject | emitted from the said LED is irradiated to irradiation object via the said light guide means, the emission point of light can be brought as close as possible to irradiation object, and light spreads It is possible to irradiate the irradiation target with light before it ends. That is, even if the LED is away from the irradiation target, it is possible to irradiate light concentrated on a straight line of the irradiation target.

  Further, since the light guide means clamping member is sandwiched from the front end to the base end of the face plate portion of the light guide means, which does not need to be entirely held at the front end portion thereof, the heat generated by the LED is Heat can be radiated from the light guide means through the light guide means clamping member. And since the base end part of the said light guide means clamping member is integrally connected to the said heat radiating member, the heat | fever of the said light guide means clamping member can be thermally radiated from the said heat radiating member efficiently. Therefore, compared with the case where the LED heat is radiated by the heat radiating member alone, a smaller heat radiating member can sufficiently radiate the heat, so that the line light irradiation unit can be downsized.

  In addition, even if the LED has a high output, the heat dissipation member can be reduced by the above configuration, and the line light irradiation unit alone can be reduced in size. When lined up, more line light irradiation units can be provided densely than before. That is, since the number of line light irradiation units that can be arranged with respect to the irradiation target can be increased, the light intensity can be increased on a straight line where the line light is collected on the irradiation target.

  As described above, according to the light irradiation device of the present invention, the light emission point can be as close as possible to the irradiation target by the light guide means, so that loss due to the spread of light is prevented and the heat dissipation member is formed small. Since more line light irradiation units can be provided radially, the intensity of the irradiated light can be greatly improved.

  In addition, since the LED can be arranged at a position away from the irradiation target while placing the light emission point near the irradiation target, a large space can be secured in the circumferential direction, and the LED wiring is formed. Large substrates can also be used. Therefore, since the wiring formed on the substrate can also be formed thick, it can be made highly reliable with no problems such as disconnection, and is suitable for using a high-power LED.

  In order to be able to irradiate the light emitted from the LED without waste, and to efficiently dissipate the heat generated from the LED, it is provided between the LED and the base end surface, and from the LED What is necessary is just to further provide the rod lens which condenses the emitted light, and the rod lens is clamped by the light guide means clamping member.

  As a specific mode for suitably radiating the heat generated from the LED, any LED may be used as long as the LED is attached to the heat radiating member.

  In order to cure the photocurable resin efficiently, the LED may be an ultraviolet LED.

  Moreover, as a specific aspect of the light guide means, there may be mentioned one in which the light guide means is a transparent solid light guide plate.

  The gap formed by the line light irradiation units provided radially is used more effectively, the heat radiation efficiency is further improved, and the number of line light irradiation units that can be installed can be increased. In order to further improve the strength, it suffices if the second heat dissipating fin is formed at the tip of the light guide means clamping member.

  Thus, according to the present invention, by using the light guide means, the light emission point can be as close as possible to the irradiation target, and the spread of the light can be prevented. Further, the light guide means sandwiching member sandwiches the entire light guide means at the distal end portion, and the base end portion is integrally connected to the heat dissipation member to improve the heat dissipation efficiency more than before. Line light irradiation units can be provided radially. Because the two synergistic effects described above can greatly improve the intensity of light irradiated to the irradiation target, it can be used suitably for applications that require high-intensity light, such as curing a photocurable resin. Can do.

The schematic diagram of the light irradiation apparatus which concerns on one Embodiment of this invention. The typical exploded view of the light irradiation apparatus in the embodiment. The typical enlarged view of the line light irradiation unit in the embodiment. The schematic diagram of the light irradiation apparatus which concerns on another embodiment of this invention. The conceptual diagram which shows the light irradiation apparatus in case the heat dissipation is not considered in the past. The conceptual diagram which shows the light irradiation apparatus at the time of considering heat radiation conventionally.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3. For the sake of simplicity, in the present embodiment, the direction in which the line light extends is defined as a linear direction. Further, a side from which the line light irradiation unit 10 described later emits light is referred to as a distal end side, and the opposite side is referred to as a proximal end side.

  The light irradiation apparatus 100 of this embodiment is used for curing a photocurable resin by irradiating the photocurable resin with ultraviolet light.

  As shown in FIG. 1, the light irradiation apparatus 100 includes a plurality of line light irradiation units 10 that irradiate line light on a liquid photocurable resin that is an irradiation target W by a fixing member (not shown). Are arranged at equal intervals in a radial manner so as to intersect on a straight line. Here, the liquid photo-curing resin as the irradiation target W is, for example, surrounded by the frame body C so as not to move as shown in FIG.

  The line light irradiation unit 10 has a transparent solid rectangular plate shape in which light incident from the base end face 11 is emitted from the front end face 12 facing the base end face 11 as shown in FIGS. A light guide plate 1 serving as a light guide means, an LED 2 provided on a straight line so that the emitted light is incident on the base end surface 11, and a base end surface 11 side of the light guide plate 1, and a first heat radiation. The heat radiating member 3 in which the fins 32 are formed, the light guide plate clamping member 4 which is a light guide means clamping member for clamping the light guide plate 1 from the heat radiating member 3, the light guide plate 1, the heat radiating member 3, and the light guide plate And a cover 6 for covering the side surface portion of the holding member 4. As shown in FIG. 1, the line light irradiation unit 10 has a three-dimensional shape with a long side in the linear direction, which is the depth direction of the paper, and is thinner toward the distal end and thicker toward the proximal end, and is arranged radially. The line light irradiation units 10 do not interfere with each other. In FIGS. 1 and 3, the cover 6 shown in FIG. 2 is removed.

  Each part will be described.

  The light guide plate 1 is configured such that light emitted from the LED 2 and incident from the base end surface 11 is emitted from the distal end surface 12 while repeating total reflection at the face plate portion 13. A rod lens 5 is provided close to or in close contact with the base end surface 11, and the light from the LED 2 is collected by the rod lens 5 so that most of the light is incident on the distal end surface 12. It is configured. The distal end surface 12 is disposed as close to the irradiation target W as possible, and is disposed so as not to contact the light guide plate 1 of the adjacent line light irradiation unit 10.

  The LED 2 is an ultraviolet LED 2 that irradiates ultraviolet rays, is provided in a straight line on the substrate 21, and the surface of the substrate 21 opposite to the surface on which the LED 2 is provided is integrated with the heat dissipation member 3. It is attached. That is, heat generated by the LED 2 is easily conducted to the heat radiating member 3.

  The heat radiating member 3 includes a base portion 31 to which the substrate 21 is attached, and first heat radiating fins 32 protruding from the base portion 31 to the base end side of the line light irradiation unit 10. The trunk portion 31 is formed by extending a groove 311 that engages with a proximal end portion 42 of a light guide plate clamping member 4 to be described later on a side surface of a substantially rectangular parallelepiped block. The first heat radiating fins 32 are provided with blower fans 33 at two locations, and the air is passed through the gaps between the first heat radiating fins 32 so that heat radiation is more suitably performed.

  The light guide plate sandwiching member 4 has a substantially inverted convex shape, and is composed of two symmetrical left and right sandwich plates. The distal end portion 41 of the light guide plate sandwiching member 4 extends from the distal end of the face plate portion 13 to the proximal end. The base end portion 42 is integrally connected to the heat radiating member 3. Here, being integrally connected means that the members are closely engaged with each other and can be regarded as being thermally integrated. The light guide plate clamping member 4 is configured to also clamp the rod lens 5. The distal end portion 41 has a thin plate shape so as to cover the entire surface of the face plate portion 13, and the proximal end portion 42 is substantially U-shaped so as to engage with the trunk portion 31 of the heat radiating member 3. It is formed in a shape and swells in the radial direction aligned radially compared to the tip portion 41.

  According to the light irradiation device 100 of the present embodiment configured as described above, conventionally, when the high power line light irradiation units 10 are arranged in a radial pattern, the heat radiation member 3 becomes large and interferes. For this reason, the light guide plate 1 can emit light in the vicinity of the irradiation target W, which has only been provided with a light emission point at a position away from the irradiation target W.

  Further, since the front end portion 41 of the light guide plate clamping member 4 does not need to hold the whole, the face plate portion 13 of the light guide plate 1 is sandwiched from the front end to the base end, so that the heat generated by the LED 2 is conducted. Heat can be radiated through the optical plate holding member 4. And since the said light-guide plate clamping member 4 is integrally connected to the said heat radiating member 3, the heat conduction from the said light-guide plate clamping member 4 can also be performed efficiently. Therefore, even if the volume and area of the first heat dissipating fins 32 are reduced compared to the case where the heat dissipating member 3 alone dissipates the LED 2, it is possible to sufficiently dissipate the heat while using the high-power ultraviolet LED 2. The line light irradiation unit 10 can be reduced in size.

  Moreover, since the line light irradiation unit 10 can be reduced in size, in the case where the line light irradiation units 10 are arranged in a radial pattern with respect to the irradiation target W, more line light irradiation units 10 can be provided densely than in the past. . That is, since more line light irradiation units 10 can be disposed on the light irradiation target W than in the past, the photo-curing resin that is the irradiation target W can be irradiated with high-intensity light and quickly cured. it can.

  That is, since the light emission point can be made as close as possible to the irradiation target W by the light guide plate 1, it is possible to prevent the ultraviolet light from the LED 2 from diffusing, and the heat dissipation member 3 is provided by the light guide plate clamping member 4. Since the number of line light irradiation units 10 that can be arranged radially can be increased, the intensity of ultraviolet light can be greatly improved as compared with the conventional case.

  Other embodiments will be described with reference to the drawings. The same reference numerals are assigned to members corresponding to those in the embodiment.

  As shown in FIG. 4, for example, a second heat radiation fin 411 may be provided at the tip 41 of the light guide plate sandwiching member 4. The second heat radiation fin 411 is provided upright with respect to the face plate portion 13 and protrudes into a gap formed by the adjacent line light irradiation unit 10. Moreover, since it is comprised so that the height may become so low that it goes to the front-end | tip part 41, heat dissipation efficiency can be improved further, making it not interfere with the 2nd radiation fin of the adjacent line light irradiation unit 10. FIG. . Therefore, since the heat radiation efficiency can be improved, the number of line light irradiation units 10 can be further increased, so that the light intensity can be further improved.

  In the above embodiment, the light guide means is a transparent solid light guide plate. However, the light guide means has a rectangular shape, the base end face and the front end face are open, and the inside of the face plate portion and other side faces is a mirror. It may be a mirror unit formed by Even in such a case, even if the LED is separated from the irradiation target, the light emission point can be brought close to the irradiation target and the heat can be radiated through the light guide means clamping member. Therefore, the heat radiation member can be made small, and the line light irradiation unit can also be made small, so that more line light irradiation units can be arranged in a radial manner, so that the intensity of light irradiated to the irradiation target is improved. Can be made.

  In the above embodiment, six line light irradiation units are arranged in a radial pattern. You may adjust the number according to the intensity | strength of a required ultraviolet-ray, and the degree of heat radiation.

  In the embodiment, the light guide plate and the light guide plate sandwiching member are in contact with the entire surface without any gap, but any material may be used as long as the heat from the light guide plate is in contact with the light guide plate sandwiching member. For example, the light guide plate may be covered with the light guide plate sandwiching member and contacted only at the base end and the tip end of the face plate portion.

  Although the rod lens is used in the embodiment, a cylindrical lens, a Fresnel lens, or the like may be used.

  In addition, various modifications and combinations of embodiments may be performed without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Light irradiation apparatus 10 ... Line light irradiation unit 1 ... Light guide means 11 ... Base end surface 12 ... Front end surface 13 ... Face plate part 2 ... LED
3 ... Radiating member 32 ... Second radiating fin 4 ... Light guide plate clamping member 5 ... Rod lens

Claims (6)

A plurality of line light irradiation units for irradiating line light are light irradiation devices provided radially so that their optical axis surfaces intersect on a straight line on the irradiation target,
The line light irradiation unit has a rectangular plate shape in which light incident from the base end surface is emitted from a front end surface facing the base end surface;
LEDs arranged in a straight line so that the emitted light is incident on the base end face;
A heat dissipating member provided on the base end face side of the light guiding means and having a first heat dissipating fin;
A light guide means clamping member for clamping the light guide means from the heat dissipation member,
The light guide means clamping member clamps from the front end to the base end of the face plate portion of the light guide means at the front end portion, and the base end portion is integrally connected to the heat radiating member. A light irradiation device.   The rod lens which is provided between the LED and the base end surface and collects light emitted from the LED is further provided, and the rod lens is sandwiched between the light guide member sandwiching members. Light irradiation device.   The light irradiation apparatus according to claim 1, wherein the LED is attached to the heat dissipation member.   The light irradiation apparatus according to claim 1, wherein the LED is an ultraviolet LED.   The light irradiation device according to claim 1, wherein the light guide means is a transparent solid light guide plate.   The light irradiation apparatus according to claim 1, 2, 3, 4, or 5, wherein a second heat radiation fin is formed at a distal end portion of the light guide means clamping member.