JP2017033735A - Light irradiation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light irradiation device capable of controlling a plurality of light irradiation units individually.SOLUTION: A light irradiation device 1 includes an irradiator part 2 and a power supply control part 3. The irradiator part 2 includes a plurality of light source units 50 and a plurality of control units 7. Each light source unit 50 has a printed circuit board 51 and a plurality of linear light source parts 52, and each control unit 7 has a printed circuit board 71 and a control circuit 70. The printed circuit board 71 is connected to the corresponding printed circuit board 51 via a flat cable E4. Each printed circuit board 71 is connected to the power supply control part 3 in series in a row via wiring E2, E5 for control, and the power supply control part 3 supplies drive power to each of the light source units 50 via wiring E1, E3 for power supply, the control unit 7 and the flat cable E4, and supplies a control signal to the plurality of control circuits 70 via the wiring E2 for control. The control circuits 70 perform lighting control of a corresponding light source part 52 individually based on the control signal.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a light irradiation apparatus used for curing a photocurable resin, for example.

  In recent years, a photo-curing resin has been used as a part formation or an adhesive. A photo-curing resin is a resin having a property of being cured by light of a specific wavelength, and ultraviolet light is generally widely used as the light to be cured. Various light irradiation apparatuses for irradiating and curing such a photo-curing resin have been proposed. However, since the illuminance of an ultraviolet light-emitting element is relatively low, a plurality of light-emitting elements are generally arranged. By using a light irradiation module configured by arranging a plurality of provided light irradiation units, the illuminance necessary for curing the photocurable resin is ensured (for example, see Patent Document 1).

Japanese Patent Application No. 2014-90055

  In the conventional light irradiation apparatus, the whole light irradiation module composed of a plurality of light irradiation units is collectively controlled, and the light irradiation units are not individually controlled. Therefore, for example, even when the length dimension of the object irradiated with light is significantly smaller than the longitudinal dimension of the light irradiation module, there is a problem that all the light irradiation units are controlled to be lighted and power is wasted. It was. Moreover, since the light irradiation module has a structure in which a plurality of light irradiation units are fixed to the heat radiation member with an adhesive, it is impossible to replace only the failed irradiation unit.

  An object of the present invention is to provide a light irradiation apparatus capable of individually controlling a plurality of light irradiation units.

  The light irradiation apparatus of the present invention includes an irradiator unit and a power supply control unit for controlling the irradiator unit, and the irradiator unit includes a plurality of light sources arranged in a longitudinal direction of the irradiator unit. And a plurality of control units provided corresponding to each of the plurality of light source units. Each of the plurality of light source units is provided on a first printed circuit board and the first printed circuit board. A plurality of light source units, and each of the plurality of control units includes a second printed circuit board and a control circuit provided on the second printed circuit board, and the second printed circuit board corresponds to the second printed circuit board. It is electrically connected to the first printed circuit board of the light source unit via a plurality of connection wires, and each of the second printed circuit boards of the control unit is connected to the power supply control unit via a power supply wire. Connected in a daisy chain In addition, the power supply control unit is connected in a daisy chain to the power supply control unit via the control wiring, and the power supply control unit is connected to the power supply line, the plurality of control units, and the plurality of connection wirings. Driving power is supplied to each of the light source sections and a control signal is supplied to the plurality of control circuits via the control wiring, and the plurality of second printed circuit boards are spaced apart from each other at a predetermined interval in the longitudinal direction. The plurality of control circuits are individually controlled to turn on the corresponding light source units based on the control signal.

  The irradiator further includes a heat radiating means for radiating heat generated by the light source unit, the plurality of light source units are provided on one side of the heat radiating means, and the plurality of control units are the heat radiating means. It was provided in the other surface side.

  The irradiator unit further includes a plurality of flat cables for connecting the plurality of first printed boards and the plurality of second printed boards, and each of the plurality of flat cables includes the plurality of connections. A first cable terminal connected to the first printed circuit board, and a second cable terminal connected to the second printed circuit board, and connected to the second printed circuit board. The width direction of the second cable terminal is inclined with respect to a predetermined direction perpendicular to the width direction of the first cable terminal connected to the first printed circuit board.

  Further, the irradiator unit further includes a casing for accommodating and holding the plurality of control units, the casing has a back plate extending in the longitudinal direction, and the back plate is provided with a plurality of locking slits, Each of the plurality of second printed circuit boards is provided with a locking protrusion, each of the plurality of second printed circuit boards is inserted into the casing from the opening of the casing, and the locking protrusion is It is positioned by being inserted into the locking slit.

  According to the light irradiation device of the present invention, since each of the plurality of control units individually controls the lighting of each of the corresponding plurality of light source units, the plurality of light source units can be individually controlled to be lighted. It is possible to cope with the usage pattern of the light irradiation device in detail, such as turning on only the light source unit and turning off unnecessary light source units. In addition, each of the plurality of control units is connected in a daisy chain to the power supply control unit via the control wiring, and is connected to the corresponding light source unit via the plurality of connection wirings. Compared with the case where a plurality of light source units are connected to the power supply controller using a plurality of wires without using a control unit, the wiring can be made clear and the number of control units and light source units can be easily increased or decreased. it can.

  In addition, since the printed circuit boards of each of the plurality of control units are arranged in the longitudinal direction, even if the plurality of light source units are arranged at a relatively small pitch in a predetermined direction, the corresponding plurality of control units are compact. Can be arranged.

  According to the light irradiation apparatus of the present invention, each of the plurality of flat cables includes a first cable terminal connected to the printed circuit board of the light source unit, a second cable terminal connected to the printed circuit board of the control unit, And the connection direction of the control unit of the second cable terminal to the printed circuit board is inclined with respect to a predetermined direction perpendicular to the connection direction of the light source unit of the first cable terminal to the printed circuit board. Can be reduced, and the twisted flat cable can be prevented from bulging and the overall size of the light irradiation device can be prevented from becoming bulky.

  Further, according to the light irradiation device of the present invention, the printed circuit board of the control unit is inserted into the casing from the opening of the casing, and the locking projection provided on the printed circuit board of the control unit is formed in the locking slit of the casing. Since it is positioned by being inserted, attachment / detachment of the second printed circuit board to / from the casing can be facilitated.

The perspective view of the light irradiation apparatus which concerns on embodiment of this invention. The disassembled perspective view of the irradiator part 2 with which the light irradiation apparatus shown in FIG. 1 is provided. (A) is the elements on larger scale of the irradiation part shown in FIG. 2, (b) is the perspective view which expands (a) further. The bottom view of the irradiator part provided with the heat radiating member shown in FIG. The block diagram which shows simply the circuit structure of the light irradiation apparatus shown in FIG.

  Hereinafter, a light irradiation apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. Referring to FIG. 1, the illustrated light irradiation apparatus 1 includes an irradiator unit 2 and a power source control unit 3 for controlling the irradiator unit 2. The irradiator unit 2 and the power source control unit 3 are They are connected to each other via a pair of first power supply wiring E1 and first control wiring E2.

  2 and 3, the irradiator unit 2 includes a heat radiation member 4 (heat radiation means) having a rectangular shape in plan view, a light source module 5 mounted on the bottom surface 41 of the heat radiation member 4, and the heat radiation member 4. A casing 6 fixed to the upper surface 42 and a plurality of control units 7 accommodated and held in the casing 6 are provided.

  The heat radiating member 4 has a refrigerant channel 43 inside, and is configured to radiate heat generated from the light source module 5 to the outside via the refrigerant flowing through the refrigerant channel 43. Referring also to FIG. 4, the light source module 5 includes a plurality of light source units 50 arranged in the longitudinal direction D <b> 1 of the irradiator unit 2, and each light source unit 50 is a print attached to the lower surface 41 of the heat radiating member 4. A substrate 51 (first printed circuit board) and a plurality of linear light source units 52 (light source units) arranged and mounted on the printed circuit board 51 in the longitudinal direction D1 are mounted on the printed circuit board 51. It is composed of a plurality of LEDs 53 (light emitting elements) mounted in a line in the short direction D2. The heat generated by each LED 53 is transmitted to the heat radiating member 4 through the printed circuit board 51 and is cooled by the refrigerant flowing through the refrigerant flow path 43 provided in the heat radiating member 4.

  As shown in FIG. 2, the casing 6 includes a frame body 8 that is fixed to the upper surface 42 of the heat radiating member 4 and has an open front surface and an upper surface, and a laterally L-shaped upper lid 9 that covers the front surface and the upper surface opening of the frame body 8. It consists of and.

  The frame 8 has a pair of end plates 81 facing each other in the longitudinal direction D1, and has a band-shaped front plate 83 fixed to the pair of end plates 81 below the front surface. On the other hand, the back surface of the frame body 8 has a back plate 82 fixed to a pair of end plates 81. At the upper end of the back plate 82, a plurality of locking slits S1 are provided at equal intervals in the longitudinal direction D1. The front plate 83 inclines toward the center in the short direction D2 as it goes downward, and then bends downward. As a whole, the front plate 83 has a "<" shape that is substantially outward in plan view. Defines a wiring space S3 (FIG. 3A). In addition, the front plate 83 is provided with a plurality of insertion slits S2 for passing a flat cable E4 described later at equal intervals in the longitudinal direction D1. Each of the insertion slits S <b> 2 extends so as to straddle the bent portion B (FIG. 3A) of the front plate 83.

  The upper lid 9 is provided with a plurality of ventilation holes (not shown) for releasing the heat in the casing 6. Further, the frame body 8 is provided with a terminal block 10 along the longitudinal direction D <b> 1 at the front opening located above the front plate 83. The terminal block 10 distributes the power supplied from the power supply control unit 3 to each control unit 7, and is a pair of upper and lower terminals electrically fixed and supported by a pair of end plates 81 of the frame 8. A plurality of terminal screws 12 are screwed to each terminal plate 11.

  The plurality of control units 7 are provided so as to correspond to the plurality of light source units 50 on a one-to-one basis, and are configured to individually control the plurality of linear light source units 52 included in the corresponding light source unit 50. Each control unit 7 includes a printed circuit board 71 (second printed circuit board), a plurality of electronic components 72 mounted on the printed circuit board 71, and terminal fittings 73 electrically connected to the electronic components 72. A control circuit 70 (FIG. 5) for controlling lighting of the LED 53 is configured by the plurality of electronic components 72. The printed circuit board 71 of each control unit 7 is accommodated and held in the casing 6 with a predetermined distance from each other in the longitudinal direction D1 in a state of facing the longitudinal direction D1.

  More specifically, the printed circuit board 71 of each control unit 7 is provided with a locking projection 74 that protrudes outward in the short-side direction D2, and this locking projection 74 is inserted into the locking slit S1 of the frame body 8. As a result, the printed circuit board 71 is positioned with respect to the frame body 8. In this state, by screwing the pair of terminal screws 12 to the corresponding pair of terminal fittings 73, the printed circuit board 71 is fixed to the terminal block 10 (terminal board 11), and the printed circuit board 71 and the terminal board 11 are electrically connected. Are connected to each other, and power from the power supply control unit 3 is supplied to the control unit 7.

  The printed circuit board 71 of each control unit 7 and the corresponding printed circuit board 51 of the light source unit 50 are electrically connected via a flexible flat cable E4, and the cover member 20 covers the flat cable E4. To the casing 6. In FIG. 2, the flat cable E4 and the second control wiring E5 described later are omitted. As shown in FIG. 3, the flat cable E4 has one cable terminal E41 connected to the printed circuit board 71 of the control unit 7, and passes through the insertion slit S2 formed in the housing 6 while being twisted in the wiring space S3. After extending downward, the control unit 7 is detachably connected to a terminal portion 75 attached to an inclined portion below the side edge of the printed circuit board 71 of the control unit 7. The other cable terminal E42 of the flat cable E4 is detachably connected to a connector 54 provided on the printed circuit board 51 of the light source unit 50.

  The cable terminal E42 is connected to the connector 54 of the printed circuit board 51 so that the width direction D4 thereof faces the horizontal direction along the longitudinal direction D1, and the cable terminal E41 is connected to the printed circuit board 51 in the width direction D5. The cable terminal E42 is connected to the terminal portion 75 of the printed circuit board 71 so as to be inclined with respect to the vertical direction D3 (predetermined direction) perpendicular to the width direction D4 of the cable terminal E42. Compared with the case of D3, the twist on the flat cable E4 can be reduced to reduce the burden on the flat cable E4. Moreover, since the twist of the flat cable E4 can be reduced, the outward expansion of the flat cable E4 can be suppressed, and the overall size of the irradiator unit 2 can be further reduced. Further, since the flat cable E4 extends through the wiring space S3 defined by the front plate 83, it is possible to prevent the flat cable E4 from expanding greatly outward, and the cover member 20 covering the flat cable E4 is provided with the casing. 6 can be prevented from projecting outward from the front plate 92 of the upper lid 9 constituting 6.

  The printed circuit boards 71 of the control units 7 adjacent to each other are electrically connected to each other via the second control wiring E5. As a result, the printed circuit board 71 of each control unit 7 is connected in a daisy chain to the power supply control unit 3 via the first control wiring E2 and the plurality of second control wirings E5. The control circuit 70 is electrically connected to the power supply control unit 3 in parallel.

  As shown in FIG. 1, the power control unit 3 includes a housing 31, and a light source selection switch 32, a light amount setting switch 33, a display panel 34, and a power switch 36 are provided on the front surface of the housing 31. . The light source selection switch 32 is for selecting a linear light source unit 52 whose light amount is to be adjusted from among the plurality of linear light source units 52. The light amount setting switch 33 is for setting the light amount of the light from the LED 53 for the selected linear light source unit 52. By operating the light amount setting switch 33, the light amount level is set in a range of 0 to 100, for example. The display panel 34 digitally displays the unit number (for example, “CH1”) of the linear light source unit 52 selected by the light source selection switch 32 and the light amount level set by the light amount setting switch 33.

  Further, as shown in FIG. 5, a power supply unit 37 and a controller 38 are built in the casing 31 of the power supply control unit 3. The power supply unit 37 supplies drive power to the control circuit 70 of each control unit 7 via the first and second power supply lines E1 and E3 (power supply lines). The flat cable E4 is configured by bundling a plurality of connection wirings E6 provided corresponding to the plurality of linear light source units 52, and the driving power supplied to the control circuit 70 is flat cable E4 (connection wiring). It is supplied to each linear light source unit 52 of the light source unit 50 via E6). When the power switch 36 is turned on, the drive power from the power supply means 37 is supplied to the LEDs 53 of each linear light source unit 52, and when the power switch 36 is turned off, the supply of drive power from the power supply means 37 is cut off. .

  The controller 38 includes a control signal generation unit 39 and a control signal output unit 40. The control signal generation unit 39 generates a control signal corresponding to the light amount set by the light amount setting switch 33. The control signal output means 40 outputs the control signal to the control circuit 70 of the specific control unit 7 via the first and second control wirings E2 and E5 (control wiring).

  Next, lighting control of the LED 53 will be described. When the power switch 36 is turned on, the driving power from the power supply means 37 is supplied to the LED 53 via the control unit 7, and the control signal generating means 39 performs control corresponding to the set light level (for example, level 50). A signal is generated, and the control signal output means 40 outputs this control signal to the control circuit 70 of each control unit 7. Thereby, the LED 53 of each linear light source unit 52 is turned on with a light amount of a set light amount level (for example, level 50).

  For example, when it is desired to turn off only the linear light source unit 52 located on the most upstream side (the leftmost side in FIG. 4), the control is performed as follows. First, the light source selection switch 32 is operated to select the most upstream linear light source unit 52, and the light amount setting switch 33 is operated to reduce the light amount level to zero. As a result, the control signal generating unit 39 generates a control signal corresponding to the light amount level 0, and the control signal output unit 40 outputs this control signal to the control circuit 70 of the control unit 7 on the most upstream side. Then, the control circuit 70 turns off only the LED 52 of the linear light source unit 52 located on the most upstream side based on the received control signal (the light amount level is set to 0).

  As described above, in the light irradiation device 1 according to the present embodiment, since the plurality of control units 7 are provided corresponding to each of the plurality of light source units 50, for example, one of the control circuits 70 has a problem. However, it is only necessary to replace the corresponding control unit 7, and it is not necessary to replace all the control units 7, and it is possible to suppress the cost for repair and the like. When the control unit 7 is removed, the corresponding pair of terminal screws 12 and the cable terminal E41 of the flat cable E4 are removed, and the connection between the second control wiring E5 and the connection terminal 76 is released. Since it is only necessary to pull 7 upward from the frame body 8, the control unit 7 can be easily replaced.

  Furthermore, since the plurality of control units 7 are electrically connected in parallel to the power supply control unit 3, the number of the control units 7 and the light source units 50 can be easily increased or decreased.

  The light irradiation device in the present embodiment can be used as a lighting device or the like in addition to being used for curing a photo-curing resin.

  As mentioned above, although the light irradiation apparatus which concerns on embodiment of this invention was demonstrated with reference to attached drawing, this invention is not limited to this embodiment, Various deformation | transformation thru | or correction | amendment are carried out, without deviating from the scope of the present invention. Is possible.

  For example, in the above embodiment, the plurality of light source units 50 are arranged in one row in the longitudinal direction D1, but may be arranged in two or more rows in the longitudinal direction D1, and in this case, the flat cable E4 is connected to the control unit 7. It is also possible to extend from both sides of the short direction D2.

DESCRIPTION OF SYMBOLS 1 Light irradiation apparatus 2 Irradiator part 3 Power supply control part 4 Heat radiating member 5 Light source module 6 Casing 7 Control unit 8 Frame 50 Light source unit 51 Printed circuit board (1st printed circuit board)
52 Linear light source (light source)
53 LED (Light Emitting Element)
70 Control Circuit 71 Printed Circuit Board (Second Printed Circuit Board)
E1 First power supply wiring E2 First control wiring E3 Second power supply wiring E4 Flat cable E5 Second control wiring E6 Connection wiring S2 Insertion slit

JP 2014-90055 A

Claims (4)

An irradiator section;
A power control unit for controlling the irradiator unit,
The irradiator unit includes a plurality of light source units arranged in a longitudinal direction of the irradiator unit, and a plurality of control units provided corresponding to each of the plurality of light source units,
Each of the plurality of light source units includes a first printed circuit board, and a plurality of light source units provided on the first printed circuit board,
Each of the plurality of control units includes a second printed circuit board and a control circuit provided on the second printed circuit board, and the second printed circuit board includes the first printed circuit board of the corresponding light source unit. Electrically connected via a plurality of connecting wires,
Each of the second printed circuit boards of the control unit is connected in a daisy chain to the power control unit via a power wiring, and is connected to the power control unit via a control wiring. Connected,
The power supply control unit supplies driving power to each of the plurality of light source units via the power supply wiring, the plurality of control units, and the plurality of connection wirings, and the power supply control unit via the control wiring Supply control signals to multiple control circuits,
The plurality of second printed circuit boards are arranged at predetermined intervals in the longitudinal direction,
The plurality of control circuits individually control lighting of the corresponding light source units based on the control signal. The irradiator unit further includes a heat dissipation means for radiating heat generated by the light source unit,
2. The light irradiation apparatus according to claim 1, wherein the plurality of light source units are provided on one side of the heat dissipation unit, and the plurality of control units are provided on the other side of the heat dissipation unit. The irradiator unit further includes a plurality of flat cables for connecting the plurality of first printed circuit boards and the plurality of second printed circuit boards,
Each of the plurality of flat cables includes the plurality of connection wirings, and includes a first cable terminal connected to the first printed circuit board and a second cable terminal connected to the second printed circuit board. Have
The width direction of the second cable terminal connected to the second printed circuit board is inclined with respect to a predetermined direction perpendicular to the width direction of the first cable terminal connected to the first printed circuit board. The light irradiation apparatus according to claim 1 or 2. The irradiator unit further includes a casing that houses and holds the plurality of control units, the casing includes a back plate extending in the longitudinal direction, and the back side plate is provided with a plurality of locking slits. Each of the second printed circuit boards is provided with a locking projection,
2. Each of the plurality of second printed circuit boards is inserted into the casing through an opening of the casing, and is positioned by inserting the locking protrusion into the locking slit. The light irradiation apparatus in any one of -3.

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