JP2019012603A - Light radiation device - Google Patents

Abstract

To provide a light radiation device which enables an LED package to be replaced by itself and can secure contact between an LED package and external electrode and heat radiation means during use.SOLUTION: A light radiation device 10 includes an anode bar 24, a cathode bar 26, an anode elastic body 32, and a cathode elastic body 34. The anode bar 24 has an anode terminal surface 108 facing an anode surface 66 of an SMD type LED package 20, extends from the anode terminal surface 108, and is formed by a conductive heat conduction material. The anode elastic body 32 biases the anode terminal surface 108 to the anode surface 66 of the SMD type LED package 20 from a side of the anode bar 24 which is opposite to the anode terminal surface 108 as seen along an extension direction. The cathode side is similarly formed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a light irradiation apparatus.

  Conventionally, as shown in Patent Documents 1 to 3, a light irradiation device using an LED package as a light source is known. The LED package includes an LED element, a case substrate on which the LED element is placed, an electrode drawn from the LED element to the outside of the case substrate, and an enclosing member that encloses the LED element.

  This LED package is classified into several types such as a shell type, a chip-on-board (COB), and a surface mount type (Surface Mount Device, hereinafter referred to as SMD as appropriate) depending on the mounting form. Among these, the SMD type LED package is provided with electrodes on the back surface of the case substrate (the surface facing the LED element mounting surface). By adopting such a structure, the connection structure between the electrode of the LED package and the external wiring can be accommodated within the width (surface direction) of the case substrate, and there is an advantage that it is suitable for reducing the diameter of the light irradiation device. .

  For example, the light irradiation head disclosed in Patent Document 4 includes a pair of conductive parts connected to an anode and a cathode provided on the back surface of the SMD type LED package. Further, a heat radiating body is provided between the pair of conductive portions so as to abut on a heat radiating surface provided between the anode and the cathode on the back surface of the SMD type LED package. The pair of conductive parts are soldered to the anode and the cathode, respectively.

Japanese Patent No. 4379731 Japanese Patent No. 5193091 Japanese Patent No. 5195678 JP 2007-67113 A

  By the way, there is a demand for changing the wavelength of the light source such as switching the light source from visible light to ultraviolet light. Also, when the light source reaches the end of its life or fails, the light source must be replaced.

  When the light source wavelength is switched or the light source is replaced, the LED package on which the LED element is mounted is taken out from the light irradiation device. At this time, if the LED package and the external electrode are joined together by solder or the like, it is necessary to collectively remove them from the light irradiation device, and the replacement work becomes complicated. Further, since the replacement is performed in units of assembly including the LED package and the external electrode, it is more expensive than a single LED package. If the LED package is to be taken out alone, it is necessary to remove the solder from the old LED package that has reached the end of its life and attach the solder to the new LED package, which requires the skill of the replacement operator. Therefore, an object of the present invention is to provide a light irradiation device that can be replaced by an LED package alone and that ensures contact between the LED package, an external electrode, and a heat dissipation means during use.

  The present invention relates to a light irradiation apparatus. The apparatus includes an SMD type LED package, an anode bar, a cathode bar, an anode elastic body, and a cathode elastic body. In the SMD type LED package, an LED element is placed on the surface of a case substrate, and an anode surface and a cathode surface are formed on the back surface facing the surface. The anode bar has an anode terminal surface facing the anode surface of the SMD type LED package, and extends from the anode terminal surface and is made of a conductive heat conductive material. The cathode bar has a cathode terminal surface facing the cathode surface of the SMD type LED package, and extends from the cathode terminal surface and is made of a conductive heat conductive material. The anode elastic body urges the anode terminal surface of the anode bar toward the anode surface of the SMD type LED package from the opposite side of the anode bar along the extending direction of the anode terminal surface. The cathode elastic body urges the cathode terminal surface of the cathode bar to the cathode surface of the SMD type LED package from the opposite side of the cathode bar along the extending direction of the cathode terminal surface.

  In the above invention, the anode bar may include an anode terminal including an anode terminal surface, and an anode heat conduction unit connected to the anode terminal. The cathode bar may include a cathode terminal including a cathode terminal surface and a cathode heat conducting unit connected to the cathode terminal.

  In the above invention, the anode heat conducting part may be formed with a larger heat capacity than the anode terminal, and the cathode heat conducting part may be formed with a larger heat capacity than the cathode terminal.

  In the above invention, the anode bar and the cathode bar may be extended in parallel to each other, and the anode bar and the cathode bar may be relatively movable along the extending direction.

  In the above invention, an insulating member having a sliding surface may be provided between the anode bar and the cathode bar.

  Moreover, in the said invention, you may provide the insulating tube which covers the outer periphery of the assembly of an anode bar and a cathode bar.

  Also, in the above invention, one of the joining surface of the anode heat conducting portion to the anode terminal and the joining surface of the anode terminal to the anode heat conducting portion is a convex surface of a quadrisphere, and the other is a concave surface of a quarter hemisphere that matches this. It may be. Further, one of the joining surface of the cathode heat conducting portion with the cathode terminal and the joining surface of the cathode terminal with the cathode heat conducting portion may be a convex surface of a quadrisphere, and the other may be a concave surface of a quarter hemisphere.

  According to the present invention, the replacement of the LED package alone is possible, and the contact between the LED package, the external electrode, and the heat dissipation means is ensured during use.

It is a figure which illustrates the whole perspective view of the light irradiation apparatus which concerns on this embodiment. It is a figure which illustrates the disassembled perspective view of the light irradiation apparatus which concerns on this embodiment. It is a figure which illustrates the XZ cross section of the light irradiation apparatus which concerns on this embodiment. It is a figure which illustrates the XZ cross section of the light irradiation apparatus which concerns on another embodiment.

  FIG. 1 illustrates a light irradiation apparatus 10 according to this embodiment. 1 to 4, the longitudinal direction of the light irradiation device 10 is taken as the X axis, and the Y axis and the Z axis perpendicular to the X axis are taken. Both the Y axis and the Z axis extend in the radial direction of the light irradiation device 10 and are orthogonal to each other.

  In the example shown in FIG. 1, the light irradiation apparatus 10 is comprised by what is called a pen-shaped substantially cylindrical shape. The diameter of the light irradiation device 10 (the outer diameter of the case 36) is, for example, 15 mm. The length of the light irradiation device 10 (length in the X-axis direction) is, for example, 100 mm or more and 120 mm or less. In addition, the light irradiation apparatus 10 which concerns on this embodiment is not limited to a pen type | mold, Other shapes and structures may be sufficient.

  The light irradiation device 10 has an irradiation window 12 formed at the front end (X-axis positive direction end, hereinafter the same), and a plug 14 formed at the rear end (X-axis direction negative direction end). By inserting the plug 14 into a socket of a DC power source (not shown), light (visible light, ultraviolet light, etc.) is irradiated from the irradiation window 12.

  FIG. 2 illustrates an exploded perspective view of the light irradiation device 10. The light irradiation device 10 includes a front cap 16, a front spacer 18, an SMD type LED package 20, an LED fixing case 22, an anode bar 24, a cathode bar 26, an insulating sheet 28, an insulating tube 30, an anode spring 32, a cathode spring 34, and a case. 36, a spring holder 38, a rear spacer 40, and a rear cap 42.

  The front cap 16 is provided at the front end of the light irradiation device 10, and the irradiation window 12 is provided. The irradiation window 12 is made of a light transmissive member such as glass or quartz. Illuminance can be improved by mirror finishing the inner peripheral surface of the opening of the front cap 16 in which the irradiation window 12 is fitted. Instead of providing a light transmissive member as the irradiation window 12, the member may be omitted to form a hole.

  The front cap 16 is formed in a substantially bottomed cylindrical shape, and a threaded portion 44 with a thread is formed on the outer peripheral surface thereof. The threaded portion 44 is screwed into a threaded portion 46 that is formed on the inner peripheral surface of the front end of the case 36 and is threaded.

  Thus, the case 36 and the front cap 16 are fastened with screws, and the front cap 16 can be easily detached from the case 36 by hand. Thereby, the SMD type LED package 20 in the case 36 can be easily taken out, and the replacement work of the SMD type LED package 20 can be easily performed. The front cap 16 is made of metal such as aluminum. The front cap 16 and the case 36 may be fixed by fitting, screwing, or the like.

  The front spacer 18 is provided between the front cap 16 and the SMD type LED package 20 to prevent contact between them. In addition, the front spacer 18 enables the SMD type LED package 20 to slide with respect to the front cap 16. The front spacer 18 also has a function of a pressing member that fixes the SMD type LED package 20 to the LED fixing case 22.

  The front spacer 18 is made of, for example, an insulating resin material. Further, the front spacer 18 is made of a heat resistant material because it contacts the SMD type LED package 20. For example, the front spacer 18 is made of PEEK resin. The front spacer 18 is formed in a substantially disk shape, and an opening 48 for allowing the light of the SMD type LED package 20 to pass through is provided at the center in the radial direction.

  The LED fixing case 22 has a substantially cylindrical shape, and the inner peripheral shape is formed in accordance with the shape of the SMD type LED package 20. For example, when the SMD type LED package 20 has a square plate shape of 3.5 mm × 3.5 mm, the inner peripheral shape of the LED fixing case 22 is the SMD type LED package 20 and the thickness direction (X-axis direction). For example, it becomes a square shape of about 3.5 mm × 3.5 mm. When the light irradiation device 10 is used (at the time of irradiation), the SMD type LED package 20 is accommodated in the LED fixing case 22. The LED fixing case 22 is made of an insulating and heat-resistant material, for example, PEEK resin. The LED fixing case 22 may be marked so that the anode and the cathode can be identified.

  In the lower left of FIG. 3, an enlarged view of the XZ cross section around the SMD type LED package 20 is illustrated. As shown in FIG. 3, the SMD type LED package 20 includes an LED element 88, a case substrate 90, an anode electrode 84, a cathode electrode 86, and a sealing glass 112. An LED element 88 is placed on the surface of the case substrate 90. The LED element 88 may be a visible light LED element, an ultraviolet LED element or an infrared LED element.

  The anode electrode 84 of the case substrate 90 is connected to an anode electrode (not shown) provided on the bottom surface of the LED element 88. The anode electrode 84 extends to the back surface of the case substrate 90, that is, the surface facing the mounting surface of the LED element 88. The cathode electrode 86 of the case substrate 90 is connected to the cathode electrode (not shown) of the LED element 88. The cathode electrode 86 extends to the back surface of the case substrate 90 in the same manner as the anode electrode 84. The anode surface 66 that is the exposed surface of the anode electrode 84 and the cathode surface 69 that is the exposed surface of the cathode electrode 86 are opposed to the anode terminal 62 of the anode bar 24 and the cathode terminal 64 of the cathode bar 26 when the light irradiation device 10 is assembled. To do.

  FIG. 4 illustrates an SMD type LED package 20 according to another embodiment. The SMD type LED package 20 according to this example includes an LED element 88, a case substrate 90, an anode electrode 84, a cathode electrode 86, and a sealing resin 92. An LED element 88 is placed on the case substrate 90.

  An anode electrode 84 is connected to an anode electrode (not shown) provided on the bottom surface of the LED element 88. The anode electrode 84 extends to the back surface of the case substrate 90. Similarly, the cathode electrode 86 is connected to the cathode electrode (not shown) of the LED element 88. The cathode electrode 86 extends to the back surface of the case substrate 90.

  The insulating tube 30 covers the outer periphery of the cylindrical assembly in which the anode bar 24, the cathode bar 26, and the insulating sheet 28 are assembled. As a result, conduction between the anode bar 24 and cathode bar 26 and the case 36 is avoided. The outer peripheral diameter of the insulating tube 30 is formed to be smaller than the inner peripheral diameter of the case 36, and the inner peripheral diameter of the insulating tube 30 is formed to be larger than the outer peripheral diameter of the columnar assembly. It is preferable that the gap between the case 36 and the insulating tube 30 and the gap between the insulating tube 30 and the columnar assembly be as narrow as possible and that they do not contact each other. Moreover, you may apply | coat insulating heat conductive grease to a clearance gap. The insulating tube 30 is made of a resin material such as Teflon (registered trademark).

  The case 36 is, for example, a cylindrical member, and includes a front spacer 18, an SMD type LED package 20, an LED fixing case 22, an anode bar 24, a cathode bar 26, an insulating sheet 28, an insulating tube 30, an anode spring 32, and a cathode. The spring 34, the spring holder 38, and the rear spacer 40 are accommodated. In order to improve heat dissipation, the case 36 is made of a highly heat conductive material such as aluminum. In addition, the heat dissipation may be enhanced by forming fins by forming the outer peripheral surface of the case 36 to have an uneven cross-section.

  The front end of the case 36 is sealed with the front cap 16. The rear end of the case 36 is sealed with a rear cap 42. In the same manner as the threaded portion 46 that meshes with the threaded portion 44 of the front cap 16, a threaded portion 61 (meshed with the threaded portion 50 of the rear cap 42 is formed on the inner peripheral surface of the rear end of the case 36. 3) is formed. The rear cap 42 and the case 36 may be fixed by fitting, screwing, or the like.

  The spring holder 38 is formed with receiving ports 52A and 52B for receiving the rear ends (X-axis negative direction end portions) of the anode spring 32 and the cathode spring 34. Further, in the accommodation port 52A, the anode spring 32 and the anode wiring 54 are conductively joined (see FIG. 3). Similarly, the cathode spring 34 and the cathode wiring 56 are electrically connected to each other in the accommodation port 52B. The anode wiring 54 and the cathode wiring 56 are drawn out from the rear end of the spring holder 38, and are drawn out to the outside of the light irradiation device 10 through the opening 58 (see FIG. 3) of the rear spacer 40 and the opening 60 of the rear cap 42. Further, the rear ends of the anode wiring 54 and the cathode wiring 56 are connected to the plug 14.

  The inner peripheral diameters of the accommodating ports 52A and 52B of the spring holder 38 are formed to be equal to or larger than the outer peripheral diameters of the anode spring 32 and the cathode spring 34. The depth (depth) of the storage ports 52A and 52B is 10% or more and 70% or less, more preferably 20% or more and 50% or less of the length of the anode spring 32 and the cathode spring 34 (length in the X-axis direction). It may be.

  Further, instead of the housing ports 52A and 52B, pins extending in the longitudinal direction may be inserted into the anode spring 32 and the cathode spring 34 to support them. In this case, the length of the pin (length in the X-axis direction) is 10% or more and 70% or less, more preferably 20% or more and 40% of the length of the anode spring 32 and the cathode spring 34 (length in the X-axis direction). It may be the following.

  The anode spring 32 (anode elastic body) and the cathode spring 34 (cathode elastic body) are constituted by, for example, coil springs. As will be described later, the anode spring 32 and the cathode spring 34 urge the terminal surface 108 (see FIG. 3) of the anode bar 24 and the terminal surface 110 of the cathode bar 26 to the anode surface 66 and the cathode surface 69 of the SMD type LED package 20. It is a biasing means. The rear ends of the anode spring 32 and the cathode spring 34 are accommodated in the accommodating ports 52A and 52B of the spring holder 38 as described above.

  The front end of the anode spring 32 is fitted into a pin 57 provided on the opposite side of the rear end of the anode bar 24, that is, the side on which the anode terminal surface 108 is provided along the longitudinal direction (extending direction). Similarly, the front end of the cathode spring 34 is fitted into a pin 59 provided on the opposite side in the longitudinal direction (extending direction) from the rear end of the cathode bar 26, that is, the side where the cathode terminal surface 110 is provided. The

  The anode spring 32 and the cathode spring 34 may function as conductors that electrically connect the anode bar 24 and the cathode bar 26 to the anode wiring 54 and the cathode wiring 56. In this case, the anode spring 32 and the cathode spring 34 are formed of a conductive material such as steel or stainless steel whose surface is nickel-plated or gold-plated, for example, like the contact spring.

  Instead of the anode spring 32, an elastic body such as rubber may be used. When the elastic body is an insulating material, a wiring that electrically connects the anode bar 24 and the cathode bar 26 to the anode wiring 54 and the cathode wiring 56 may be used.

  The anode bar 24 is a conductive member that extends in the longitudinal direction of the light irradiation device 10, that is, in the direction perpendicular to the back surface of the SMD type LED package 20. In addition to this, as will be described later, the anode bar 24 has an anode terminal surface 108 which faces the anode surface 66 (see FIG. 3) of the SMD type LED package 20 and can be brought into contact therewith. A heat-conducting material extending from

  For example, the anode bar 24 is composed of a conductive member such as copper or aluminum from the anode terminal 62 at the front end to the heat conduction portion 68 at the rear portion and the pin 57 at the rear portion. Thereby, the anode surface 66 of the SMD type LED package and the anode spring 32 are electrically connected.

  The anode bar 24 is formed, for example, so as to have a substantially semicircular shape when viewed from the longitudinal direction, in other words, to have a substantially semicylindrical shape (a bowl shape) in perspective. An anode terminal 62 is formed at the front end of the anode bar 24. The anode terminal 62 includes an anode terminal surface 108 which faces the anode surface 66 (see FIG. 3) of the SMD type LED package 20 and can be brought into contact therewith. It is preferable that the anode terminal surface 108 and the anode surface 66 of the SMD type LED package 20 coincide (the same area). Further, insulating heat conductive grease may be applied to a portion other than the contact surface with the anode surface 66 to improve the heat conduction efficiency. The width of the anode terminal 62 in the Y-axis direction is formed to be equal to or less than the width of the square opening in the inner periphery of the LED fixing case 22 and can be inserted into the square opening in the inner periphery of the LED fixing case 22.

  The anode bar 24 includes an anode terminal 62 having an anode terminal surface 108 and a heat conducting portion 68 connected to the anode terminal 62. For example, the heat conducting portion 68 is extended in the longitudinal direction. The heat conducting portion 68 is formed with a larger heat capacity than the anode terminal 62. The anode bar 24 is a conductive member and also has a function as a heat dissipation member to which heat generated from the SMD type LED package 20 is transmitted. By providing a heat capacity corresponding to the mass of the heat conducting unit 68, it is possible to efficiently receive the heat of the SMD type LED package 20.

  Moreover, the connection part of the anode terminal 62 and the heat conduction part 68 may be a structure which both can move relatively. For example, as illustrated in FIG. 3, one of the joining surface 100 of the heat conducting portion 68 to the anode terminal 62 and the joining surface 102 of the anode terminal 62 to the heat conducting portion 68 is a convex surface of a quadrisphere. It is formed so as to be a concave surface of a quarter hemisphere that matches this. As a result, the anode terminal 62 can be rotated (swinged) with respect to the heat conducting portion 68, and as a result, the contact between the anode terminal 62 and the anode surface 66 of the SMD type LED package 20 is smoothly performed. Conductive thermal conductive grease may be applied between the joint surface 100 of the heat conducting portion 68 and the joint surface 102 of the anode terminal 62 so that the rotation can be performed smoothly. In the case where the rotation function is not necessary, the anode terminal 62 and the heat conducting portion 68 may be integrated as a single member instead of separate members.

  The anode bar 24 is provided with a round hole 70. The round hole 70 is penetrated in the Z-axis direction of FIG. 2, for example. A fastening member 78 is inserted into the round hole 70. The round hole 70 is provided at the front end and the rear end of the heat conducting unit 68, for example.

  Further, a pin 57 is provided at the rear end of the anode bar 24 so as to extend in the longitudinal direction and into which the front end of the anode spring 32 is fitted. The outer diameter of the pin 57 is formed to be equal to or smaller than the inner diameter of the anode spring 32. The length of the pin 57 (length in the X-axis direction) may be 10% or more and 70% or less, more preferably 20% or more and 40% or less of the length of the anode spring 32 (length in the X-axis direction). .

  Further, instead of the pin 57, this may be supported by inserting the front end of the anode spring 32 into the accommodation port perforated on the front end side in the longitudinal direction. In this case, the depth (depth) of the accommodation port may be 10% or more and 70% or less, more preferably 20% or more and 50% or less of the length of the anode spring 32 (length in the X-axis direction).

  Similarly to the anode bar 24, the cathode bar 26 is a conductive member that extends in the longitudinal direction of the light irradiation device 10. For example, the cathode bar 26 and the anode bar 24 extend in parallel to each other. Further, as will be described later, the cathode bar 26 and the anode bar 24 are relatively movable along the extending direction.

  As will be described later, the cathode bar 26 has a cathode terminal surface 110 that faces the cathode surface 69 (see FIG. 3) of the SMD type LED package 20 and can be brought into contact therewith, and heat that extends from the cathode terminal surface 110. With conductive material. The cathode bar 26 is formed, for example, so as to have a substantially semicircular shape when viewed from the longitudinal direction, in other words, to have a substantially semicylindrical shape in perspective.

  For example, the cathode bar 26 is formed of a conductive heat conductive material such as copper or aluminum from the cathode terminal 64 at the front end to the heat conductive portion 72 at the rear portion and the pin 59 at the rear portion. Thereby, the cathode surface 69 of the SMD type LED package and the cathode spring 34 are electrically connected.

  A cathode terminal 64 is formed at the front end of the cathode bar 26. The cathode terminal 64 includes a cathode terminal surface 110 that faces the cathode surface 69 of the SMD type LED package 20 and can be brought into contact therewith. It is preferable that the cathode terminal surface 110 and the cathode surface 69 of the SMD type LED package 20 coincide (the same area). Alternatively, the heat conduction efficiency may be improved by applying insulating heat conduction grease to a place other than the contact surface with the cathode surface 69. The width of the cathode terminal 64 in the Y-axis direction is formed to be equal to or smaller than the width of the square opening in the inner periphery of the LED fixing case 22 and can be inserted into the square opening in the inner periphery of the LED fixing case 22.

  The cathode bar 26 includes a cathode terminal 64 having a cathode terminal surface 110 and a heat conducting portion 72 connected to the cathode terminal 64. For example, the heat conducting part 72 extends in the longitudinal direction. The heat conducting portion 72 is formed to have a larger heat capacity than the cathode terminal 64. Similar to the anode bar 24, the cathode bar 26 is a conductive member and also has a function as a heat radiating member to which heat generated from the SMD type LED package 20 is transmitted. By providing a heat capacity corresponding to the mass of the heat conducting portion 72, it is possible to efficiently receive the heat of the SMD type LED package 20.

  In order to promote heat dissipation of the SMD type LED package 20, that is, in order to obtain a high heat capacity, the heat conducting portions 68 and 72 are configured to occupy a large mass in the light irradiation device 10. For example, the shape of the heat conducting portions 68 and 72 is determined so that the sum of the masses of the heat conducting portions 68 and 72 is 20% or more, preferably 50% or more of the entire mass of the light irradiation device 10.

  Further, a pin 59 is provided at the rear end of the cathode bar 26 so as to extend in the longitudinal direction and into which the front end of the cathode spring 34 is fitted. The outer diameter of the pin 59 is formed to be equal to or smaller than the inner diameter of the cathode spring 34. The length of the pin 59 (length in the X-axis direction) may be 10% or more and 70% or less, more preferably 20% or more and 40% or less of the length of the cathode spring 34 (length in the X-axis direction). .

  Further, instead of the pin 59, this may be supported by inserting the front end of the cathode spring 34 into an accommodation port perforated on the front end side in the longitudinal direction. In this case, the depth (depth) of the accommodation port may be 10% or more and 70% or less, more preferably 20% or more and 30% or less of the length of the cathode spring 34 (length in the X-axis direction).

  Here, when the pins 57 and 59 are provided at the rear ends of the anode bar 24 and the cathode bar 26, it is preferable that the spring holder 38 is provided with the accommodation ports 52 </ b> A and 52 </ b> B. On the other hand, when the accommodation port is provided at the rear ends of the anode bar 24 and the cathode bar 26, it is preferable to provide a pin on the spring holder 38.

  Further, similarly to the anode bar 24, the connecting portion between the cathode terminal 64 and the heat conducting portion 72 may have a structure in which both can be moved relative to each other. For example, as illustrated in FIG. 3, one of the joining surface 104 of the heat conducting portion 72 with the cathode terminal 64 and the joining surface 106 of the cathode terminal 64 with the heat conducting portion 72 is a convex surface of a quarter hemisphere. It is formed so as to be a concave surface of a quarter hemisphere that matches this. As a result, the cathode terminal 64 can be rotated (swinged) with respect to the heat conducting portion 72, and as a result, the contact between the cathode terminal 64 and the cathode surface 69 of the SMD type LED package 20 is smoothly performed. Conductive thermal conductive grease may be applied between the joint surface 104 of the heat conducting portion 72 and the joint surface 106 of the cathode terminal 64 so that the rotation can be performed smoothly. In addition, when the said rotation function is unnecessary, it is good also as an integral member instead of making the cathode terminal 64 and the heat conduction part 72 into another member.

  The cathode bar 26 is provided with a long hole 74. The long hole 74 is penetrated in the Z-axis direction of FIG. 2, for example. Further, the length of the long hole 74 (X-axis direction) is formed to be longer than the length of the short direction (Y-axis direction) orthogonal thereto. The long holes 74 are provided at the front end and the rear end of the heat conducting portion 72, for example. Further, when the anode terminal 62 of the anode bar 24 and the cathode terminal 64 of the cathode bar 26 are aligned and the front ends thereof are aligned, the center of the round hole 70 of the anode bar 24 and the center of the elongated hole 74 of the cathode bar 26 are aligned. Each hole is formed so that the positions match.

  The insulating sheet 28 is a substantially plate-like insulating member provided between the anode bar 24 and the cathode bar 26. The insulating sheet 28 is made of an insulating material. In addition, since the insulating sheet 28 is sandwiched between heat conducting portions 68 and 72 that receive heat from the SMD type LED package 20, the insulating sheet 28 is preferably made of a heat resistant material. For example, the insulating sheet 28 is made of a resin material such as PEEK.

  Moreover, it is preferable that the surface of the insulating sheet 28 that contacts the anode bar 24 and the cathode bar 26 is a sliding surface. By doing in this way, the anode bar 24 and the cathode bar 26 are smoothly moved with respect to the insulating sheet 28.

  Furthermore, the insulating sheet 28 is provided with a round hole 76. For example, the round hole 76 is penetrated in the Z-axis direction of FIG. When the anode terminal 62 of the anode bar 24 and the cathode terminal 64 of the cathode bar 26 are aligned and the front ends thereof are aligned, the center of the round hole 70 of the anode bar 24, the center of the elongated hole 74 of the cathode bar 26, and Each hole is formed so that the center positions of the round holes 76 of the insulating sheet 28 coincide.

  The anode bar 24 and the cathode bar 26 are assembled so as to sandwich the insulating sheet 28 therebetween. This assembly is temporarily fixed by a fastening member 78. The shaft portion 80 (see FIG. 3) of the fastening member 78 is inserted into the round holes 70 and 76 and the long hole 74 of the assembly. The fastening member 78 is composed of, for example, a screw. In order to prevent conduction between the anode bar 24 and the cathode bar 26, the fastening member 78 is made of an insulating material. Further, the fastening member 78 is formed of a heat-resistant material so as to withstand heat transmitted from the SMD type LED package 20. For example, the fastening member 78 is composed of a PEEK screw.

  The longitudinal direction (X-axis direction) width L1 of the shaft portion 80 of the fastening member 78 is formed to be shorter than the longitudinal length L2 of the elongated hole 74. For example, L2 ≧ 2 × L1. The shaft portion 80 of the fastening member 78 is formed to be longer than the total hole depth of the round holes 70 and 76 and the long hole 74. The distal end of the shaft portion 80 (the end portion on the side facing the screw head) protrudes from the elongated hole 74, and a fastening member 82 such as a bolt is screwed into the shaft portion 80, whereby the anode bar 24, the insulating sheet 28, The cathode bar 26 is temporarily fixed.

  Here, the fastening of the fastening members 78 and 82 is so-called loose fitting fastening, and it is preferable that the anode bar 24 and the cathode bar 26 can be relatively moved in the longitudinal direction (X-axis direction) at the time of fastening. As described above, the longitudinal direction (X-axis direction) width L1 of the shaft portion 80 of the fastening member 78 is formed to be shorter than the longitudinal length L2 of the elongated hole 74. Based on the difference (L2−L1) between the longitudinal width L1 and the length L2, the anode bar 24 and the cathode bar 26 are movable. As this moving form, for example, the anode bar 24 and the cathode bar 26 can move synchronously or can move relative to each other independently.

  FIG. 3 illustrates an XZ sectional view of the light irradiation device 10. The anode spring 32 and the cathode spring 34 are accommodated in the case 36 and are configured to be contracted from the natural length when the front and back of the case 36 are sealed by the front cap 16 and the rear cap 42. The rear ends of the anode spring 32 and the cathode spring 34 are fixed by a spring holder 38. Therefore, the anode bar 24 and the cathode bar 26 are urged forward (X-axis positive direction) by the anode spring 32 and the cathode spring 34. As a result, the anode terminal 62 of the anode bar 24 and the cathode terminal 64 of the cathode bar 26 come into contact with the anode surface 66 and the cathode surface 69 of the SMD type LED package 20.

  In addition, when an excessive pressing force is applied to the SMD type LED package 20 at the time of contact, there is a risk of damage. Therefore, the anode springs of the anode terminal 62 and the cathode terminal 64 so as to press the anode surface 66 and the cathode surface 69 are 0.1N or more and 50N or less, more preferably 1N or more and 3N or less. It is preferable that the amount of contraction and the spring coefficient of 32 and the cathode spring 34 are adjusted.

  In this state, DC power is supplied from the plug 14, DC power is supplied to the LED element 88 via the anode electrode 84 and the cathode electrode 86, and light is emitted from the LED element 88.

  As described above, in the light irradiation device 10 according to the present embodiment, the SMD type LED package 20 is not joined to any member of the light irradiation device 10, and therefore, when replacing the light source, only the SMD type LED package 20 can be replaced. That's it. As a result, switching from a visible light source to an ultraviolet light source or an infrared light source, or replacement of a failed SMD LED package 20 can be easily performed.

  Further, the anode bar 24 and the cathode bar 26 are urged by the anode spring 32 and the cathode spring 34 and brought into contact with the SMD type LED package 20, thereby ensuring power supply to the SMD type LED package 20. Further, when the anode bar 24 and the cathode bar 26 are in direct contact with the SMD type LED package 20, the heat generated in the SMD type LED package 20 is quickly transferred to the heat conducting portions 68 and 72 of the anode bar 24 and the cathode bar 26. Is done.

  In the above-described embodiment, only the anode surface 66 (anode probe) and the cathode surface 69 (cathode probe) are formed on the back surface of the SMD type LED package 20, but this is not a limitation. For example, in addition to the anode surface 66 and the cathode surface 69, the heat sink surface may be exposed on the back surface of the SMD type LED package 20.

  In this case, the anode terminal 62 of the anode bar 24 may be formed so as to contact the heat sink surface in addition to the anode surface 66. In this case, the cathode terminal 64 of the cathode bar 26 is not in contact with the heat sink surface. Alternatively, the cathode terminal 64 of the cathode bar 26 may be formed so as to contact the heat sink surface in addition to the cathode surface 69. In this case, the anode terminal 62 of the anode bar 24 is not in contact with the heat sink surface.

DESCRIPTION OF SYMBOLS 10 Light irradiation apparatus, 12 Irradiation window, 14 Plug, 16 Front cap, 20 SMD type LED package, 24 Anode bar, 26 Cathode bar, 28 Insulation sheet, 32 Anode spring (anode elastic body), 34 Cathode spring (cathode elastic body) ), 36 case, 38 spring holder, 42 rear cap, 54 anode wiring, 56 cathode wiring, 62 anode bar anode terminal, 64 cathode bar cathode terminal, 66 SMD type LED package anode surface, 68 anode bar heat conduction Part, 69 cathode surface of SMD type LED package, 70, 76 round hole, 74 long hole, 72 heat conduction part of cathode bar, 78, 82 fastening member, 80 shaft part, 82 fastening member, 88 LED element, 90 case substrate , 100 Anode-side heat conduction part joint surface Joint surface 102 an anode terminal, 104 bonding surface of the cathode-side conductive portion, the bonding surface 106 a cathode terminal, 108 an anode terminal surface 110 a cathode terminal surface.

Claims (7)

An SMD type LED package in which an LED element is mounted on the surface of the case substrate and an anode surface and a cathode surface are formed on the back surface facing the surface;
An anode bar having an anode terminal surface facing the anode surface of the SMD type LED package and made of a conductive heat conductive material extending from the anode terminal surface;
A cathode bar having a cathode terminal surface facing the cathode surface of the SMD type LED package and extending from the cathode terminal surface and made of a conductive heat conductive material;
An anode elastic body for biasing the anode terminal surface of the anode bar to the anode surface of the SMD type LED package from the opposite side of the anode bar along the extending direction of the anode terminal surface;
A cathode elastic body for urging the cathode terminal surface of the cathode bar toward the cathode surface of the SMD type LED package from the opposite side of the cathode bar along the extending direction of the cathode terminal surface;
A light irradiation apparatus comprising: The light irradiation device according to claim 1,
The anode bar includes an anode terminal including the anode terminal surface, and an anode heat conduction unit connected to the anode terminal,
The cathode bar includes a cathode terminal including the cathode terminal surface, and a cathode heat conduction unit connected to the cathode terminal.
Light irradiation device. It is a light irradiation apparatus of Claim 2, Comprising:
The anode heat conduction part is formed to have a larger heat capacity than the anode terminal,
The cathode heat conduction part is formed with a larger heat capacity than the cathode terminal,
Light irradiation device. It is a light irradiation apparatus as described in any one of Claim 1 to 3, Comprising:
The anode bar and the cathode bar extend in parallel to each other,
The light irradiation apparatus, wherein the anode bar and the cathode bar are relatively movable along an extending direction thereof. It is a light irradiation apparatus as described in any one of Claim 1 to 4, Comprising:
A light irradiation apparatus, wherein an insulating member having a sliding surface is provided between the anode bar and the cathode bar. It is a light irradiation apparatus as described in any one of Claim 1 to 5, Comprising:
An insulating tube covering an outer periphery of the assembly of the anode bar and the cathode bar;
Light irradiation device. A light irradiation device according to any one of claims 2 to 3, and claim 4 dependent on claim 2.
One of the joining surface of the anode heat conducting portion with the anode terminal and the joining surface of the anode terminal with the anode heat conducting portion is a convex surface of a quarter hemisphere, and the other is a concave surface of a quarter hemisphere that matches this.
One of the joint surface of the cathode thermal conduction part with the cathode terminal and the joint surface of the cathode terminal with the cathode thermal conduction part is a convex surface of a quarter hemisphere, and the other is a concave surface of a quarter hemisphere that matches this.
Light irradiation device.