JP2023138198A - Circuit board fixing structure and light irradiation device - Google Patents

Abstract

To provide a circuit board fixing structure which enables a circuit board on a base to be easily replaced and is compact in a size.SOLUTION: A circuit board fixing structure which fixes a circuit board to a surface of a base comprises: a positive electrode pattern and a negative electrode pattern formed on a surface of a circuit board to supply electric power to the circuit board; a pair of first through-holes which respectively penetrates the circuit board from the positive and negative electrode patterns; a pair of second through-holes which vertically penetrates the base so as to be communicated with the respective first through-holes; a pair of electrode members which is inserted into the respective second through-holes; and a pair of fixing members which is engaged with the respective electrode members and fixes the circuit board to the base. Each electrode member has: an electrode terminal extending along the second through-hole; and an insulation member which is arranged so as to cover an outer periphery of the electrode terminal to insulate between the electrode terminal and the base and regulates rotation of each electrode member with respect to the second through-hole. When the fixing members are respectively engaged with the electrode members, the positive electrode pattern and the negative electrode pattern are electrically connected to the respective electrode terminals through the respective fixing members.SELECTED DRAWING: Figure 1

Description

The present invention relates to a circuit board fixing structure for fixing a circuit board on a base (e.g., a heat sink, a base plate), and particularly to a circuit board fixing structure having electrodes that serve both to fix the circuit board and supply power, and to a circuit board fixing structure equipped with the same. This invention relates to a light irradiation device.

Conventionally, as ink for offset sheet-fed printing, ultraviolet curing ink that is cured by irradiation with ultraviolet light has been used. Further, ultraviolet curing resins are used as sealants for FPDs (Flat Panel Displays) such as liquid crystal panels and organic EL (Electro Luminescence) panels. A light irradiation device that irradiates ultraviolet light is generally used to cure such ultraviolet curable ink or ultraviolet curable resin (for example, Patent Document 1).

The light irradiation device described in Patent Document 1 includes a heat sink, a plurality of light source modules fixed on the heat sink, a terminal block, etc. fixed to the side surface of the heat sink. Each light source module has an electrode plate arranged to protrude toward the terminal block, and power is supplied to each light source module by fixing each electrode plate to the terminal block. In addition, a fixing plate that presses the board of the light source module is arranged to cover each electrode plate, and each fixing plate and each electrode plate are fastened together to the terminal block, thereby fixing each light source module on the heat sink. It looks like this.

JP2015-28915A

In the light irradiation device described in Patent Document 1, an electrode plate and a fixing plate are separately provided to supply stable power to the light source module and fix the light source module without applying excessive stress. However, because the electrode plate and the fixing plate protrude toward the terminal block (that is, they protrude toward the outside of the light source module), the size in the direction perpendicular to the direction in which the light source modules are arranged becomes large (that is, it cannot be made thinner). There is a problem. Additionally, if the light source module needs to be replaced due to a failure, etc., the fixing plate must also be attached and removed, so a configuration that allows easier replacement of the light source module is required. It was getting worse.

The present invention was made in view of the above circumstances, and its purpose is to easily replace the circuit board (light source module, etc.) on the base (heat sink, etc.) and to create a small circuit. An object of the present invention is to provide a substrate fixing structure. Another object of the present invention is to provide a light irradiation device including such a circuit board fixing structure.

In order to achieve the above object, the circuit board fixing structure of the present invention is a circuit board fixing structure for fixing a circuit board to the surface of a metal base, and in order to supply power to the circuit board, the circuit board fixing structure fixes the circuit board to the surface of a metal base. A positive electrode pattern and a negative electrode pattern formed on the substrate, a pair of first through holes vertically penetrating the circuit board from each of the positive electrode pattern and the negative electrode pattern, and a pair of first through holes extending from the surface of the base so as to communicate with each of the first through holes. A pair of second through holes that vertically penetrate the base, a pair of electrode members that are inserted into each of the second through holes, and a pair of electrode members that are attached to the front surface of the circuit board and engage with each of the electrode members, and the circuit board is a pair of fixing members fixed to the base, each electrode member having an electrode terminal extending along the second through hole, and arranged to cover the outer periphery of the electrode terminal to insulate the electrode terminal and the base. and an insulating member that restricts rotation of each electrode member with respect to the second through hole, so that when each fixed member and each electrode member are engaged, each of the positive electrode pattern and the negative electrode pattern It is characterized in that it is electrically connected to each electrode terminal via a member.

According to this configuration, since the electrode member and the fixing member serve both to fix the circuit board and supply power, there is no need to provide a dedicated member for supplying power to the circuit board, and the circuit board fixing structure It becomes possible to downsize the. In addition, even if it becomes necessary to replace the circuit board, the task is simply to remove the fixing member and replace the circuit board (in other words, it is necessary to connect special parts to supply power to the circuit board). , wiring, etc.), it is possible to replace the circuit board with a simple operation. Further, since the electrode member is restricted from rotating, the fixing member can be easily attached and detached.

Further, it is desirable that at least a portion of the outer shape of the insulating member be formed with a flat portion parallel to the central axis of the second through hole, and that the flat portion be engaged with the second through hole.

Further, at least a portion of the outer shape of the insulating member may include a protrusion that protrudes in a direction perpendicular to the central axis of the second through hole, and the second through hole may have an accommodating portion for accommodating the protrusion. desirable.

Further, it is desirable to further include a fixing plate that is disposed on the back side of the base, has an opening through which the electrode terminal passes, and comes into contact with one end surface of the insulating member.

It is also desirable to further include a fixing plate that is disposed on the back side of the base and has an opening through which the electrode terminal passes and which fits into a part of the insulating member.

Moreover, it is desirable that each electrode member has a biasing member that biases each electrode member to separate from the circuit board.

The base has a surface on which the circuit board is placed, and includes a plate-shaped base section that is substantially parallel to the circuit board, and a plurality of plate-shaped base sections that stand up substantially perpendicularly from the back surface of the base section and extend parallel to each other. radiating fins, and each second through hole has a third through hole penetrating the base portion, and a portion of the plurality of radiating fins is perpendicular to the base so as to communicate with the third through hole. It is desirable that the fourth through hole is formed by being cut in the direction.

Further, it is desirable that the base has a flow path therein through which the refrigerant flows.

Moreover, from another point of view, the light irradiation device of the present invention includes any one of the circuit board fixing structures described above, a plurality of light emitting elements arranged on the circuit board and supplied with power from a positive electrode pattern and a negative electrode pattern, It is characterized by having the following.

Moreover, it is desirable to further include a pair of functional members disposed on the positive electrode pattern and the negative electrode pattern, respectively, and fastened together with the circuit board by each fixing member. Further, in this case, it is desirable that the pair of functional members have a mirror surface that reflects a portion of the light emitted from the plurality of light emitting elements.

Further, it is desirable that the light emitted from the light emitting element has a wavelength in the ultraviolet region.

As described above, according to the present invention, a compact circuit board fixing structure is realized in which the circuit board on the base can be easily replaced. Moreover, a light irradiation device including such a circuit board fixing structure is realized.

FIG. 1 is a diagram illustrating a schematic configuration of a light irradiation device including a circuit board fixing structure according to a first embodiment of the present invention. FIG. 1 is an exploded perspective view illustrating a schematic configuration of a light irradiation device including a circuit board fixing structure according to a first embodiment of the present invention. FIG. 2 is a perspective view illustrating the structure of an electrode rod and an insulating sleeve of the circuit board fixing structure according to the first embodiment of the present invention. It is a figure explaining the schematic structure of the light irradiation device provided with the circuit board fixing structure concerning the 2nd embodiment of the present invention. It is a figure explaining the schematic structure of the light irradiation device provided with the circuit board fixing structure concerning the 3rd embodiment of the present invention. It is a figure explaining the schematic structure of the light irradiation device provided with the circuit board fixing structure concerning the 4th embodiment of the present invention. It is a figure explaining the schematic structure of the light irradiation device provided with the circuit board fixing structure concerning the 5th embodiment of the present invention. It is an exploded perspective view explaining the schematic structure of the light irradiation device provided with the circuit board fixing structure concerning the 5th embodiment of the present invention. It is a figure explaining the schematic structure of the light irradiation device provided with the circuit board fixing structure concerning the 6th embodiment of the present invention. It is a figure explaining the schematic structure of the light irradiation device provided with the circuit board fixing structure concerning the 7th embodiment of the present invention. It is a figure explaining the schematic structure of the light irradiation device provided with the circuit board fixing structure concerning the 8th embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the same or corresponding parts in the figures are denoted by the same reference numerals, and the description thereof will not be repeated.

(First embodiment)
FIG. 1 is a diagram illustrating a schematic configuration of a light irradiation device 1 including a circuit board fixing structure 10 according to a first embodiment of the present invention, FIG. 1(a) is a perspective view, and FIG. 1(b) is a perspective view. ) is a front view, FIG. 1(c) is a rear view, and FIG. 1(d) is a sectional view taken along line AA in FIG. 1(b). Moreover, FIG. 2 is an exploded perspective view of the light irradiation device 1 of FIG. 1, FIG. 2(a) is a diagram seen diagonally from the front, and FIG. 2(b) is a diagram seen diagonally from the rear.

The light irradiation device 1 of this embodiment is a light source device that is installed in a printing device or the like to cure ultraviolet curable ink or ultraviolet curable resin, and for example, the front surface (the surface where the LED module 100 is arranged) is irradiated. It is placed above the irradiation target so as to face the target, and emits ultraviolet light downward toward the irradiation target. In this specification, as shown in FIG. 1, the direction in which an LED (Light Emitting Diode) element 110 (described later) emits ultraviolet light is referred to as the Z-axis direction, the longitudinal direction of the light irradiation device 1 is referred to as the X-axis direction, and In the description, a direction perpendicular to the Z-axis direction and the X-axis direction (the lateral direction of the light irradiation device 1) is defined as the Y-axis direction. Further, in general, ultraviolet light is considered to mean light with a wavelength of 400 nm or less, but in this specification, ultraviolet light refers to a wavelength that can cure ultraviolet curable ink (for example, 250 to 420 nm).

As shown in FIGS. 1 and 2, the light irradiation device 1 of this embodiment includes two LED modules 100, a heat sink 200 (base), an anode terminal 300a for supplying power to each LED module 100, and a cathode terminal. It includes terminals 300b and the like, and a metal box-shaped case (not shown) that accommodates them. Note that in this specification, the anode terminal 300a and the cathode terminal 300b are also collectively referred to as the electrode member 300.

The LED module 100 includes a rectangular substrate 105 (circuit board) defined by the X-axis direction and the Y-axis direction, and a plurality of LED elements 110 (light-emitting elements) on the substrate 105. Two LED modules 100 are arranged and fixed on the end face (see FIGS. 1(a), (b), and FIG. 2). The substrates 105 are, for example, ceramic substrates made of aluminum nitride with high thermal conductivity, and each substrate 105 has a pair of through holes 120 (first through holes) formed at positions corresponding to the electrode members 300. (Fig. 1(d), Fig. 2). Note that in this embodiment, by applying heat dissipation grease (not shown) to the front surface (board mounting surface) of the heat sink 200 and then placing the board 105 on the heat sink 200, the back surface of the board 105 and the heat sink 200 are connected to each other. Heat dissipation grease is sandwiched between the substrate 105 and the heat sink 200 to improve the adhesion between the substrate 105 and the heat sink 200.

As shown in FIG. 1A, the LED module 100 includes 70 LED elements 110 arranged in 7 rows (Y-axis direction) x 10 LED elements (X-axis direction) on a substrate 105. . The 70 LED elements 110 are arranged on the surface of the substrate 105 with their optical axes aligned in the Z-axis direction. On the surface of the substrate 105, an anode pattern AP (positive electrode pattern) and a cathode pattern KP (negative electrode pattern) for supplying power to each LED element 110 are formed. They are each electrically connected to one end of the pattern KP by soldering or the like (eg, conductive adhesive (silver paste), brazing material, welding/welding, diffusion bonding, etc.). Further, the anode pattern AP of this embodiment is electrically connected to the electrode bar 310 of the anode terminal 300a, and the cathode pattern KP is electrically connected to the electrode bar 310 of the cathode terminal 300b (details will be described later). . The electrode rods 310 of the anode terminal 300a and the cathode terminal 300b are electrically connected to a driver circuit (not shown), and each LED element 110 has an anode terminal 300a, a cathode terminal 300b, an anode pattern AP, and a cathode pattern. A drive current is supplied from the driver circuit via KP. When a drive current is supplied to each LED element 110, each LED element 110 emits ultraviolet light (for example, wavelength 385 nm) in an amount corresponding to the drive current. Note that the drive current supplied to each LED element 110 of this embodiment is adjusted so as to emit a substantially uniform amount of ultraviolet light, and the ultraviolet light emitted from the light irradiation device 1 is The light has a substantially uniform light intensity distribution in the X-axis direction and the Y-axis direction.

The heat sink 200 is a so-called air-cooled heat sink that is disposed in close contact with the back surface of the substrate 105 of the LED module 100 and radiates heat generated by each LED element 110. The heat sink 200 is made of a material with good thermal conductivity such as aluminum or copper, and is formed on a thin plate-shaped base portion 210 parallel to the XY plane and on a surface opposite to the surface in contact with the substrate 105. A plurality of heat radiation fins 220 are provided. Each radiation fin 220 has a thin plate shape parallel to the YZ plane, and is provided at predetermined intervals in the X-axis direction. Note that in this embodiment, the plurality of radiation fins 220 are uniformly cooled by an airflow generated by a cooling fan (not shown).

Further, a through hole 211 (second through hole) is formed in the heat sink 200 and extends vertically from the surface of the heat sink 200 (in a direction opposite to the Z-axis direction) so as to communicate with the through hole 120 of the substrate 105. The electrode member 300 is inserted into the through hole 211 (FIGS. 1(c), (d), and FIG. 2). Note that the through hole 211 of this embodiment has a through hole 212 (third through hole) having a circular cross section that penetrates the base portion 210 so as to communicate with the through hole 120 of the substrate 105 , and a through hole 212 (third through hole) that penetrates the base portion 210 . The through hole 222 (fourth through hole) is formed in the through hole 222 (fourth through hole). More specifically, the radiation fin 220 at a position corresponding to the through hole 212 is notched in a vertical direction (in a direction opposite to the Z-axis direction), and this notch 223 is aligned with the X-axis. A through hole 222 having a rectangular cross section and penetrating through the radiation fins 220 in the Z-axis direction is formed in a space surrounded by the two radiation fins 220 sandwiched in the direction. Furthermore, a recess 224 (accommodating part) that engages with a protrusion 332 of an insulating sleeve 330 of an electrode member 300 is formed in the radiation fin 220 forming the through hole 222 (FIG. 1(d)).

As described above, the electrode member 300 of this embodiment includes the anode terminal 300a connected to the anode pattern AP and the cathode terminal 300b connected to the cathode pattern KP, but the specific configurations are the same. Therefore, the cathode terminal 300b will be mainly explained below as a representative. As shown in FIG. 2, the electrode member 300 (cathode terminal 300b) of this embodiment includes an electrode rod 310 (electrode terminal), a fixing screw 320 (fixing member), and an insulating sleeve 330 (insulating member). has been done.

FIG. 3 is a perspective view illustrating the configuration of the electrode rod 310 and the insulating sleeve 330 of this embodiment. FIG. 3(a) is a perspective view showing an assembled state of the electrode rod 310 and the insulating sleeve 330, and FIG. 3(b) is an exploded perspective view. As shown in FIG. 3, the electrode rod 310 is a cylindrical metal member, and the insulating sleeve 330 is a resin member with a cylindrical distal end 330a and a square cylindrical base end 330b. The distal end portion 330a of the insulating sleeve 330 fits into the through hole 212 formed in the base portion 210, and the base end portion 330b fits into the through hole 222 of the radiation fin 220, so that the electrode rod 310 is inserted into the insulating sleeve 330. (that is, the insulating sleeve 330 is attached to the outer peripheral surface of the electrode rod 310), and is inserted into the through hole 211 of the heat sink 200 (FIG. 1(d), FIG. 2). Note that protrusions 332 protruding outward (in the Y-axis direction and in a direction opposite to the Y-axis direction) are formed on both end surfaces of the insulating sleeve 330 in the Y-axis direction, respectively, and the electrode member 300 When the electrode member 300 is inserted into the through hole 211 of the heat sink 200, the protrusion 332 engages with the recess 224 of the radiation fin 220, and movement of the electrode member 300 in the Z-axis direction is restricted. In other words, the electrode member 300 is configured not to fall off from the heat sink 200. Then, when the electrode member 300 is attached to the through hole 211, the tips of the electrode rod 310 and the insulating sleeve 330 are located on the same plane as the surface (placing surface) of the heat sink 200, or are located closer to the surface of the heat sink 200. The electrode rod 310 and the base end 330b of the insulating sleeve 330 are arranged to protrude from the back side of the heat sink 200 (FIG. 2(b)).

In this way, the light irradiation device 1 of this embodiment is assembled with the electrode member 300 attached to the through hole 211. That is, the heat sink 200 with the electrode member 300 attached to the through hole 211 is prepared, heat dissipation grease is applied to the surface (mounting surface) of the heat sink 200, and each LED module 100 is mounted. Then, alignment is performed so that the through hole 120 of the substrate 105 is located above the electrode rod 310 (on the Z-axis direction side) (that is, so that the through hole 120 communicates with the through hole 211), and the through hole 120 Attach the fixing screw 320. When the fixing screw 320 is attached to the through hole 120, the threaded portion 321 of the fixing screw 320 is screwed into the screw hole portion 310a (FIG. 1(d)) formed on the inner peripheral surface of the electrode rod 310, and the LED module 100 is , is held and fixed between the head of the fixing screw 320 and the heat sink 200 (FIG. 1(d)). As described above, in this embodiment, the base end 330b of the insulating sleeve 330 of the electrode member 300 has a square cylindrical shape and fits into the through hole 222 of the radiation fin 220, so that it cannot be fixed. Even if the screw 320 is rotated, the electrode member 300 does not rotate, and the fixing screw 320 can be easily attached and detached. Then, when the LED module 100 is fixed with the fixing screws 320, the cathode pattern KP is electrically connected to the electrode rod 310 via the fixing screws 320. Similarly, the anode pattern AP is electrically connected to the electrode rod 310 via the fixing screw 320. Therefore, when driving current for the LED elements 110 is supplied from the driver circuit connected to the pair of electrode rods 310, power is supplied to each LED element 110 via the anode pattern AP and the cathode pattern KP.

In this manner, in this embodiment, the electrode member 300 serves both to fix the substrate 105 and to supply power. Therefore, there is no need to provide a dedicated member for supplying power to the board 105, and it is possible to downsize the light irradiation device 1 (circuit board fixing structure 10). Furthermore, even if it becomes necessary to replace the LED module 100 due to a failure of the LED module 100, the task is simply to remove the fixing screw 320 and replace the LED module 100 (in other words, the LED module 100 is powered (Because there is no need to connect special members for supplying the LED or perform wiring, etc.), it is possible to replace the LED module 100 with a simple operation. In this embodiment, the base end 330b of the insulating sleeve 330 of the electrode member 300 has a square cylindrical shape and is fitted into the through hole 222 of the radiation fin 220. At the same time, the electrode member 300 does not rotate, and the protrusion 332 of the insulating sleeve 330 engages with the recess 224 of the radiation fin 220 to restrict movement of the electrode member 300 in the Z-axis direction, so it is fixed. The work of attaching and detaching the screw 320 can also be easily performed.

Although the present embodiment has been described above, the present invention is not limited to the above configuration, and various modifications can be made within the scope of the technical idea of the present invention.

For example, in the present embodiment, the light irradiation device 1 has been described as having the circuit board fixing structure 10, but the use of the circuit board fixing structure 10 is not limited to this, and the use of the circuit board fixing structure 10 is not limited to this. The present invention can be applied to a device having a configuration in which a circuit board is supported on a base plate (base plate).

Furthermore, although the light irradiation device 1 of the present embodiment has been described as having two LED modules 100, it is not limited to this, and the number of LED modules 100 may vary according to the specifications of the light irradiation device 1. Set as appropriate.

Further, although the light irradiation device 1 of the present embodiment has been described as one that emits ultraviolet light, it is not limited to such a configuration, and the present invention is a light source device that emits visible light or infrared light. It is also possible to apply it to

(Second embodiment)
FIG. 4 is a diagram illustrating a schematic configuration of a light irradiation device 2 including a circuit board fixing structure 20 according to a second embodiment of the present invention, FIG. 4(a) is a front view, and FIG. 4(b) is a front view. ) is a sectional view taken along line BB in FIG. 4(a), and FIG. 4(c) is a sectional view taken along line CC in FIG. 4(a).

As shown in FIGS. 4(b) and 4(c), in the light irradiation device 2 of this embodiment, the electrode member 300 is rotated by 90 degrees, and the protrusion 332 of the insulating sleeve 330 is aligned with the X-axis direction and the X-axis direction. The light irradiation device 1 differs from the light irradiation device 1 of the first embodiment in that the light irradiation device 1 is arranged so as to protrude in opposite directions. Furthermore, in this embodiment, instead of the recess 224 of the radiation fin 220, an opening 226 ( The light irradiation device 1 differs from the light irradiation device 1 of the first embodiment in that a storage portion) is formed.

Also in this embodiment, the base end 330b of the insulating sleeve 330 of the electrode member 300 has a square cylindrical shape and is fitted into the through hole 222 of the radiation fin 220. The electrode member 300 does not rotate. Further, since the protrusion 332 of the insulating sleeve 330 engages with the opening 226 of the radiation fin 220 to restrict movement of the electrode member 300 in the Z-axis direction, the fixing screw 320 can be attached and detached similarly to the first embodiment. Work can be done easily.

(Third embodiment)
FIG. 5 is a diagram illustrating a schematic configuration of a light irradiation device 3 including a circuit board fixing structure 30 according to a third embodiment of the present invention, FIG. 5(a) is a front view, and FIG. 5(b) is a front view. ) is a sectional view taken along line DD in FIG. 5(a), and FIG. 5(c) is an enlarged view of portion E in FIG. 5(b).

As shown in FIGS. 5(b) and 5(c), in the light irradiation device 3 of this embodiment, the tip 330a of the electrode member 300 is longer than that of the first embodiment, and the tip of the insulating sleeve 330 is longer than that of the first embodiment. The light irradiation device 1 differs from the light irradiation device 1 of the first embodiment in that a compression spring 340 (biasing member) is provided on the outer peripheral surface of the light irradiation device 330a. More specifically, when the compression spring 340 of this embodiment is attached to the tip 330a of the electrode member 300 (that is, the compression spring 340 is wound around the tip 330a), the electrode member 300 is attached to the heat sink 200. It is inserted into the through hole 211. When the electrode member 300 is inserted into the through hole 211 of the heat sink 200, the protrusion 332 engages with the recess 224 of the radiation fin 220, and the movement of the electrode member 300 in the Z-axis direction is restricted. When the compression spring 340 is compressed, the distal end thereof contacts the back surface of the base portion 210 of the heat sink 200, and the other end thereof contacts the stepped portion 330c between the distal end portion 330a and the proximal end portion 330b of the electrode member 300. It has become. Therefore, when the electrode member 300 of this embodiment is attached to the through hole 211 of the heat sink 200, the electrode member 300 is biased in a direction opposite to the Z-axis direction by the biasing force of the compression spring 340 (that is, the electrode member 300 is biased toward the substrate 105). (The electrode member 300 is urged away from the electrode member 300.) Therefore, even if there is play in the Z-axis direction between the protrusion 332 and the recess 224, it is canceled. Furthermore, when the LED module 100 is attached with the fixing screw 320, the biasing force of the compression spring 340 is also applied to the fixing screw 320, so that the LED module 100 also moves in a direction opposite to the Z-axis direction (that is, the base of the heat sink 200 portion 210), and the LED module 100 is reliably brought into close contact with the heat sink 200.

In this embodiment as well, the base end 330b of the insulating sleeve 330 of the electrode member 300 has a rectangular cylindrical shape and is fitted into the through hole 222 of the radiation fin 220. At the same time, the electrode member 300 does not rotate. Further, since the protrusion 332 of the insulating sleeve 330 engages with the recess 224 of the radiation fin 220 to restrict movement of the electrode member 300 in the Z-axis direction, the fixing screw 320 can be attached and detached similarly to the first embodiment. Work can be done easily.

(Fourth embodiment)
FIG. 6 is a diagram illustrating a schematic configuration of a light irradiation device 4 including a circuit board fixing structure 40 according to a fourth embodiment of the present invention, FIG. 6(a) is a front view, and FIG. 6(b) is a front view. ) is a cross-sectional view taken along line FF in FIG. 6(a), and FIG. 6(c) is an enlarged view of section G in FIG. 6(b).

As shown in FIG. 6, the light irradiation device 4 of this embodiment includes a pair of substrate fixing members arranged on the substrate 105 of each LED module 100 so as to sandwich the LED elements 110 on the substrate 105 from the Y-axis direction. The light irradiation device 1 differs from the light irradiation device 1 of the first embodiment in that it includes a functional member 400 (functional member). The board fixing member 400 is a metal rectangular plate-shaped member having a through hole 410 approximately in the center, and is arranged so that the through hole 410 communicates with the through hole 120 of the board 105. The substrate 105 and the heat sink 200 are fastened together with a fixing screw 320 inserted into the heat sink 200 (FIG. 6(c)). When each substrate fixing member 400 is fixed by the fixing screw 320, the substrate fixing member 400 is crimped onto the anode pattern AP, and the electrode rod 310 of the anode pattern AP and the anode terminal 300a is connected to the anode pattern AP via the substrate fixing member 400 and the fixing screw 320. are electrically connected. Similarly, the substrate fixing member 400 is crimped onto the cathode pattern KP, and the cathode pattern KP and the electrode rod 310 of the cathode terminal 300b are electrically connected via the substrate fixing member 400 and the fixing screw 320. In this embodiment, the mutually opposing side surfaces (side surfaces facing the LED element 110) of the pair of substrate fixing members 400 are tapered surfaces that are inclined to open toward the Z-axis direction. A reflecting mirror 420 is formed in the. Therefore, of the ultraviolet light emitted from the LED element 110, a component with a large divergence angle is incident on the reflection mirror 420, reflected, and guided forward (in the Z-axis direction). Therefore, the utilization efficiency of the ultraviolet light emitted from the LED element 110 increases.

Also in this embodiment, when it becomes necessary to replace the LED module 100, the task is simply to remove the fixing screw 320 and replace the LED module 100, so it is possible to replace the LED module 100 with a simple task. becomes. In this embodiment, the substrate fixing member 400 also serves as the reflecting mirror 420, but in other embodiments, the substrate fixing member 400 may have other functions such as a lens holder function. .

(Fifth embodiment)
FIG. 7 is a diagram illustrating a schematic configuration of a light irradiation device 5 including a circuit board fixing structure 50 according to a fifth embodiment of the present invention, FIG. 7(a) is a front view, and FIG. 7(b) is a front view. ) is a rear view, FIG. 7(c) is a sectional view taken along line HH in FIG. 7(a), and FIG. 7(d) is a sectional view taken along line JJ in FIG. 7(a). , FIG. 7(e) is a cross-sectional view taken along the line KK in FIG. 7(d). Moreover, FIG. 8 is an exploded perspective view of the light irradiation device 5 of FIG. 7, FIG. 8(a) is a view seen diagonally from the front, and FIG. 8(b) is a view seen diagonally from the rear.

As shown in FIGS. 7 and 8, the light irradiation device 5 of this embodiment includes a water-cooled heat sink 500 instead of the air-cooled heat sink 200, and the electrode member 300 (anode terminal 300a and cathode terminal 300b) has a different shape. The light irradiation device 1 differs from the light irradiation device 1 of the first embodiment in that it includes different electrode members 600 (an anode terminal 600a and a cathode terminal 600b) and a back fixing plate 700.

The water-cooled heat sink 500 is a thin plate-shaped cooling device parallel to the XY plane that is disposed in close contact with the back surface of the substrate 105 of the LED module 100 and radiates heat generated by each LED element 110. Inside the water-cooled heat sink 500, a water channel 550 (flow path) that reciprocates in the X-axis direction approximately at the center of the water-cooled heat sink 500 is formed (FIG. 7(e)), and a refrigerant (for example, water) flows through the water-cooled heat sink 500. Water is supplied from a water supply port 552 formed on the back surface of the water bottle 500, flows through a water channel 550, and is discharged from a drain port 554. In addition, the water-cooled heat sink 500 has a through hole 511 (second through hole) that penetrates from the surface of the water-cooled heat sink 500 perpendicularly (in a direction opposite to the Z-axis direction) so as to communicate with the through hole 120 of the substrate 105. The electrode member 600 is accommodated in the through hole 511 (FIGS. 7(c), (d), (e), and FIG. 8). Note that the through hole 511 of this embodiment is a long hole with a substantially oval cross section so as to fit with the electrode member 600.

As shown in FIG. 8, the electrode member 600 of this embodiment includes an electrode rod 610, a fixing screw 620, and an insulating sleeve 630. The electrode rod 610 is a cylindrical metal member, and the insulating sleeve 630 is a resin member that accommodates the electrode rod 610. The insulating sleeve 630 has a main body part 630b having an oval shape in XY cross section and has two flat parts 632 obtained by cutting a cylinder along two XZ planes, and protrudes forward (in the Z-axis direction) from the main body part 630b. It has a cylindrical tip 630a. The insulating sleeve 630 is adapted to fit into a through hole 511 formed in the water-cooled heat sink 500, and the electrode rod 610 is inserted and fixed into the insulating sleeve 630 (that is, the insulating sleeve 630 is attached to the outer peripheral surface of the electrode rod 610). is attached) and inserted into the through hole 511 of the water-cooled heat sink 500 (FIGS. 7(c), (d), FIG. 8). In this embodiment, when the electrode member 600 is inserted until the tip 630a of the insulating sleeve 630 touches the tip of the through hole 511 formed in the water-cooled heat sink 500, the electrode member 600 is completely accommodated in the through hole 511. (Fig. 7(c), (d)).

The back surface fixing plate 700 is a resin or metal plate-shaped member that is fixed to the back surface of the water-cooled heat sink 500 with screws (not shown) or adhesive. The back fixing plate 700 has a circular opening 710 that is slightly larger than the outer diameter of the electrode rod 610, and is fixed so that the electrode rod 610 is exposed from the opening 710. When the back fixing plate 700 is fixed to the water-cooled heat sink 500, the back fixing plate 700 is configured to come into contact with the main body 630b of the insulating sleeve 630 (that is, the back fixing plate 700 prevents the electrode member 600 from moving in the Z-axis direction. movement is regulated), and the electrode member 600 is prevented from falling off the water-cooled heat sink 500 (FIGS. 7(c) and 7(d)).

In this manner, the light irradiation device 5 of this embodiment is assembled with the electrode member 600 attached to the through hole 511. That is, the water-cooled heat sink 500 with the electrode member 600 attached to the through-hole 511 is prepared, heat dissipation grease is applied to the surface (placing surface) of the water-cooled heat sink 500, and each LED module 100 is mounted. Then, alignment is performed so that the through hole 120 of the substrate 105 is located above the electrode rod 610 (on the Z-axis direction side) (that is, so that the through hole 120 communicates with the through hole 511), and the through hole 120 Attach the fixing screw 620. When the fixing screw 620 is attached to the through hole 120, the threaded portion 621 of the fixing screw 620 is screwed into a screw hole (not shown) formed on the inner peripheral surface of the electrode rod 610, and the LED module 100 is attached to the fixing screw 620. and the water-cooled heat sink 500 and is fixed therebetween. As described above, in this embodiment, the main body portion 630b of the insulating sleeve 630 of the electrode member 600 has an oval-shaped cross section and is fitted into the through hole 511, so that the fixing screw 620 cannot be rotated. Even if the electrode member 600 is rotated, the fixing screw 620 can be easily attached and detached. Then, when the LED module 100 is fixed with the fixing screw 620, the cathode pattern KP is electrically connected to the electrode rod 610 (cathode terminal 600b) via the fixing screw 620. Similarly, the anode pattern AP is electrically connected to the electrode rod 610 (anode terminal 600a) via the fixing screw 620. Therefore, when driving current for the LED elements 110 is supplied from the driver circuit connected to the pair of electrode rods 610, power is supplied to each LED element 110 via the anode pattern AP and the cathode pattern KP.

In this way, also in this embodiment, the electrode member 600 serves both to fix the substrate 105 and to supply power. Therefore, there is no need to provide a dedicated member for supplying power to the board 105, and the light irradiation device 5 (circuit board fixing structure 50) can be downsized. Furthermore, even if it becomes necessary to replace the LED module 100 due to a failure of the LED module 100, the task is simply to remove the fixing screw 620 and replace the LED module 100 (in other words, if the LED module 100 is powered (Because there is no need to connect special members for supplying the LED or perform wiring, etc.), it is possible to replace the LED module 100 with a simple operation. Note that in this embodiment as well, the electrode member 600 does not rotate in accordance with the rotation of the fixing screw 620, and the movement of the electrode member 600 in the Z-axis direction is restricted by the back fixing plate 700, so that the electrode member 600 cannot be fixed. The work of attaching and detaching the screw 620 can also be easily performed.

(Sixth embodiment)
FIG. 9 is a diagram illustrating a schematic configuration of a light irradiation device 6 including a circuit board fixing structure 60 according to a sixth embodiment of the present invention, in which FIG. 9(a) is a front view and FIG. 9(b) is a front view. ) is a rear view, FIG. 9(c) is a sectional view taken along line LL in FIG. 9(a), and FIG. 9(d) is a sectional view taken along line MM in FIG. 9(a). , FIG. 9(e) is a cross-sectional view taken along the line NN in FIG. 9(d).

As shown in FIGS. 9(b), (c), (d), and (e), in the light irradiation device 6 of this embodiment, the insulating sleeve 630 The main body part 630b of the insulating sleeve 630 has a cylindrical shape; The light irradiation device 5 differs from the light irradiation device 5 of the fifth embodiment in that the opening 710 of the fixed plate 700 has a rectangular shape, and the rear end 630c fits into the opening 710.

As described above, in this embodiment, the rear end 630c of the insulating sleeve 630 of the electrode member 600 has a rectangular cylindrical shape and is fitted into the opening 710 of the back fixing plate 700, so that the fixing screw 620 The electrode member 600 does not rotate in accordance with the rotation of the electrode member 600. Further, a part of the proximal end surface of the main body portion 630b of the insulating sleeve 630 (a portion outside the rear end portion 630c) comes into contact with the back surface fixing plate 700, and movement of the electrode member 600 in the Z-axis direction is restricted. Therefore, as in the fifth embodiment, the fixing screw 620 can be easily attached and detached (FIGS. 9(c) and 9(d)).

(Seventh embodiment)
FIG. 10 is a diagram illustrating a schematic configuration of a light irradiation device 7 including a circuit board fixing structure 70 according to a seventh embodiment of the present invention, FIG. 10(a) is a front view, and FIG. 10(b) is a front view. ) is a sectional view taken along line OO in FIG. 10(a), and FIG. 10(c) is a sectional view taken along line PP in FIG. 10(b).

As shown in FIG. 10(c), in the light irradiation device 7 of this embodiment, the cross-sectional shape of the through hole 511 of the water-cooled heat sink 500 is substantially rectangular. This is different from device 5.

In this manner, also in this embodiment, the main body portion 630b of the insulating sleeve 630 of the electrode member 600 has an oval-shaped cross section and is fitted into the through hole 511, so that the electrode is rotated in accordance with the rotation of the fixing screw 620. Member 600 does not rotate. Furthermore, since the proximal end surface of the insulating sleeve 630 comes into contact with the back fixing plate 700 and movement of the electrode member 600 in the Z-axis direction is restricted (FIG. 10(b)), it is easy to attach and detach the fixing screw 620. be able to.

(Eighth embodiment)
FIG. 11 is a diagram illustrating a schematic configuration of a light irradiation device 8 including a circuit board fixing structure 80 according to an eighth embodiment of the present invention, FIG. 11(a) is a front view, and FIG. 11(b) ) is a sectional view taken along the QQ line in FIG. 11(a).

As shown in FIG. 11, the light irradiation device 8 of this embodiment includes a pair of substrate fixing members arranged on the substrate 105 of each LED module 100 so as to sandwich the LED elements 110 on the substrate 105 from the Y-axis direction. The light irradiation device 5 is different from the light irradiation device 5 of the fifth embodiment in that it includes the light irradiation device 400. The board fixing member 400 is a metal rectangular plate-shaped member having a through hole 410 approximately in the center, and is arranged so that the through hole 410 communicates with the through hole 120 of the board 105. The substrate 105 and the water-cooled heat sink 500 are fastened together by fixing screws 620 inserted into the substrate 105 (FIG. 11(b)). When each substrate fixing member 400 is fixed by the fixing screw 620, the substrate fixing member 400 is crimped onto the anode pattern AP (not shown in FIG. 11), and the anode pattern AP is connected to the anode pattern AP via the substrate fixing member 400 and the fixing screw 620. The electrode rod 610 of the anode terminal 600a is electrically connected. Similarly, the substrate fixing member 400 is crimped onto the cathode pattern KP (not shown in FIG. 11), and the cathode pattern KP and the electrode rod 610 of the cathode terminal 600b are electrically connected via the substrate fixing member 400 and fixing screws 620. Connected. In this embodiment, the mutually opposing side surfaces (side surfaces facing the LED element 110) of the pair of substrate fixing members 400 are tapered surfaces that are inclined to open toward the Z-axis direction. A reflecting mirror 420 is formed in the. Therefore, of the ultraviolet light emitted from the LED element 110, a component with a large divergence angle is incident on the reflection mirror 420, reflected, and guided forward (in the Z-axis direction). Therefore, the utilization efficiency of the ultraviolet light emitted from the LED element 110 increases.

In this way, in this embodiment as well, when it becomes necessary to replace the LED module 100, the task is simply to remove the fixing screw 620 and replace the LED module 100, so the LED module 100 can be replaced with a simple task. It becomes possible to do so.

It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

1 : Light irradiation device 2 : Light irradiation device 3 : Light irradiation device 4 : Light irradiation device 5 : Light irradiation device 6 : Light irradiation device 7 : Light irradiation device 8 : Light irradiation device 10 : Circuit board fixing structure 20 : Circuit board Fixing structure 30 : Circuit board fixing structure 40 : Circuit board fixing structure 50 : Circuit board fixing structure 60 : Circuit board fixing structure 70 : Circuit board fixing structure 80 : Circuit board fixing structure 100 : LED module 105 : Board 110 : LED element 120 : Through hole 200 : Heat sink 210 : Base part 211 : Through hole 212 : Through hole 220 : Radiation fin 222 : Through hole 223 : Notch part 224 : Recessed part 226 : Opening part 300 : Electrode member 300a : Anode terminal 300b : Cathode terminal 310 : Electrode rod 310a : Screw hole part 320 : Fixing screw 321 : Screw part 330 : Insulating sleeve 330a : Tip part 330b : Base end part 330c : Step part 332 : Projection part 340 : Compression spring 400 : Board fixing member 410 : Through hole 420: Reflection mirror 500: Water-cooled heat sink 511: Through hole 550: Water channel 552: Water supply port 554: Drain port 600: Electrode member 600a: Anode terminal 600b: Cathode terminal 610: Electrode rod 620: Fixing screw 621: Screw part 630: Insulation Sleeve 630a: Tip part 630b: Main body part 630c: Rear end part 632: Plane part 700: Back fixing plate 710: Opening part

Claims (12)

A circuit board fixing structure for fixing a circuit board to the surface of a metal base,
a positive electrode pattern and a negative electrode pattern formed on the surface of the circuit board for supplying power to the circuit board;
a pair of first through holes vertically penetrating the circuit board from each of the positive electrode pattern and the negative electrode pattern;
a pair of second through holes that vertically penetrate the base from the surface of the base so as to communicate with the first through holes;
a pair of electrode members inserted into each of the second through holes;
a pair of fixing members that are attached to the front side of the circuit board and engage with each of the electrode members to fix the circuit board to the base;
Equipped with
Each of the electrode members is
an electrode terminal extending along the second through hole;
an insulating member arranged to cover the outer periphery of the electrode terminal to insulate the electrode terminal and the base and to restrict rotation of each of the electrode members with respect to the second through hole;
When each of the fixing members and each of the electrode members are engaged, each of the positive electrode pattern and the negative electrode pattern is electrically connected to each of the electrode terminals via each of the fixing members. Circuit board fixing structure. A flat part parallel to the central axis of the second through hole is formed on at least a part of the outer shape of the insulating member, and the flat part engages with the second through hole. The circuit board fixing structure according to claim 1. The insulating member has a protrusion on at least a part of its outer shape that protrudes in a direction perpendicular to the central axis of the second through hole,
3. The circuit board fixing structure according to claim 1, wherein the second through hole has an accommodating portion that accommodates the protrusion. Any one of claims 1 to 3, further comprising a fixing plate disposed on the back side of the base, having an opening through which the electrode terminal passes, and abutting one end surface of the insulating member. The circuit board fixing structure according to item 1. Any one of claims 1 to 3, further comprising a fixing plate disposed on the back side of the base, having an opening through which the electrode terminal passes and which fits into a part of the insulating member. The circuit board fixing structure according to item (1). The circuit according to any one of claims 1 to 5, wherein each of the electrode members has a biasing member that biases each of the electrode members to separate from the circuit board. Board fixed structure. The base is
a plate-shaped base portion having a surface on which the circuit board is placed and substantially parallel to the circuit board;
a plurality of heat dissipation fins that stand up substantially perpendicularly from the back surface of the base portion and extend parallel to each other;
Each of the second through holes is
a third through hole passing through the base portion;
A fourth through hole is formed by cutting out a part of the plurality of radiation fins in a direction perpendicular to the base so as to communicate with the third through hole. The circuit board fixing structure according to any one of claims 1 to 6. The circuit board fixing structure according to any one of claims 1 to 6, wherein the base has a channel therein through which a coolant flows. The circuit board fixing structure according to any one of claims 1 to 8,
a plurality of light emitting elements arranged on the circuit board and supplied with power from the positive electrode pattern and the negative electrode pattern;
A light irradiation device comprising: The light irradiation device according to claim 9, further comprising a pair of functional members disposed on the positive electrode pattern and the negative electrode pattern, respectively, and fastened together with the circuit board by the respective fixing members. The light irradiation device according to claim 10, wherein the pair of functional members has a mirror surface that reflects a portion of the light emitted from the plurality of light emitting elements. 12. The light irradiation device according to claim 9, wherein the light emitted from the light emitting element has a wavelength in the ultraviolet region.

Images