JP2017212182A - Power supply device, light source unit, and lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device which can inhibit an insulation sheet from being arranged in an incorrect direction, and to provide a light source unit and a lighting device.SOLUTION: A power supply device 5 includes: a case 52; a printed circuit board 51; and an insulation sheet 53. The insulation sheet 53 has protruding parts 536, 536a protruding from one surface (an upper surface) of a sheet body 531. The protruding parts 536, 536a are formed so as not to contact with any of multiple components 512 of the printed circuit board 51 which are stored in the case 52 when the insulation sheet 53 is arranged in a desired position relative to the printed circuit board 51. The protruding parts 536, 536a are formed so as to contact with any of the multiple components 512 when the insulation sheet 53 is not arranged in the desired position relative to the printed circuit board 51, and a part of the insulation sheet 53 is stored in the case 52.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a power supply device, a light source unit, and a lighting fixture. More specifically, the present invention relates to a power supply device that supplies power, a light source unit including the power supply device, and a lighting fixture that houses the light source unit.

  As an example of the prior art, an electric component storage case described in Patent Document 1 is illustrated. The electrical component storage case described in Patent Document 1 includes a case main body that stores a printed circuit board on which electrical components are mounted and an upper insulating sheet, and a case lid that engages with the case main body. The upper insulating sheet is disposed between the printed board and the case lid. The case lid has a notch piece formed by being bent in the horizontal direction inside the case. An upper insulating sheet is mounted on the notch piece.

JP 2000-59041 A

  Incidentally, the upper insulating sheet described in Patent Document 1 may be formed asymmetrically in plan view, for example. In such a case, it is necessary to arrange the upper insulating sheet in the electrical component storage case in the correct orientation in order to ensure insulation between the upper insulating sheet and the case lid. However, when the operator places the upper insulating sheet inside the electrical component storage case, it may not be noticed even if the worker places it in the electrical component storage case in the wrong direction.

  This invention is made | formed in view of the said reason, and it aims at providing the power supply device, light source unit, and lighting fixture which can suppress that an insulating sheet is arrange | positioned in the wrong direction.

  The power supply device of the present invention includes a case, a printed board, and an insulating sheet. The case is formed in a box shape having an opening. A plurality of components are mounted on at least one surface of the printed board, and the one surface is accommodated in the case so as to face the opening of the case. The insulating sheet includes a sheet main body and a protruding portion protruding from one surface of the sheet main body, and is arranged so that a tip of the protruding portion faces the one surface of the printed circuit board accommodated in the case. . The protrusion is formed so as not to contact any of the plurality of components of the printed circuit board accommodated in the case when the insulating sheet is disposed at a desired position with respect to the printed circuit board. The entire insulating sheet is accommodated in the case. The protrusion is formed so as to come into contact with any of the plurality of components when the insulating sheet is not disposed at the desired position with respect to the printed circuit board, and a part of the insulating sheet is formed in the case. Is housed inside.

  The light source unit of the present invention includes the above-described power supply device and a light source to which power is supplied by the power supply device.

  The lighting fixture of this invention is equipped with the above-mentioned light source unit and the fixture main body which accommodates the said light source unit.

  The power supply device, the light source unit, and the lighting fixture of the present invention have an effect that the insulating sheet can be prevented from being arranged in the wrong direction.

FIG. 1 is an exploded perspective view showing a lighting apparatus according to an embodiment of the present invention. FIG. 2 is a side sectional view showing the light source unit. FIG. 3 is a bottom view showing the main part of the light source unit. FIG. 4 is a plan view showing the light source unit. FIG. 5 is an exploded perspective view showing the same power supply circuit. FIG. 6 is a circuit configuration diagram showing the same power supply circuit. FIG. 7 is a side view showing the same power supply apparatus. FIG. 8 is a bottom view showing the same power supply apparatus. 9 is a three-side view showing the same insulating sheet, FIG. 9A is a front view, FIG. 9B is a bottom view, and FIG. 9C is a side view. FIG. 10 is a side view showing another state of the above power supply apparatus. FIG. 11 is a three-side view showing another example of the same insulating sheet, FIG. 11A is a front view, FIG. 11B is a bottom view, and FIG. 11C is a side view. FIG. 12 is a three-side view showing an insulating sheet according to a modification of the above, FIG. 12A is a front view, FIG. 12B is a bottom view, and FIG. 12C is a side view. FIG. 13 is a side view showing a power supply device according to a modification of the above. FIG. 14 is a side view showing another state of the power supply device of the modified example.

  Hereinafter, the power supply device 5, the light source unit 1, and the lighting fixture 10 which concern on embodiment of this invention are demonstrated in detail with reference to drawings.

  The power supply device 5 of this embodiment is a power supply device which supplies electric power to a light source as shown in FIG. Furthermore, the light source unit 1 of the present embodiment is a light source unit used in the lighting fixture 10. The lighting fixture 10 of the present embodiment is a lighting fixture that uses a plurality of solid light emitting elements (light sources) 32 and is attached to a ceiling material.

  The configuration described below is merely an example of the present invention, and is not limited to the following embodiment of the present invention. The scope of the present invention is not deviated from the technical idea according to the present invention. If so, various changes can be made according to the design and the like. Note that, unless otherwise specified in the following description, in the direction shown in FIG.

  The lighting fixture 10 of this embodiment is provided with the fixture main body 2 attached to a ceiling material using a volt | bolt, and the light source unit 1 attached to the fixture main body 2 so that attachment or detachment is possible, as shown in FIG.

  The appliance body 2 is formed into a box shape having an opening on the side facing the ceiling material by bending the sheet metal. In the instrument main body 2, a rectangular recess 21 for accommodating the light source unit 1 is provided on the opposite side (lower side) of the ceiling material along the longitudinal direction (left-right direction) of the instrument main body 2 and the entire length of the instrument main body 2. It is formed over. The instrument body 2 is formed with a pair of inclined surfaces 22 that are inclined upward as they move away from the recess 21 in the short direction (front-rear direction).

  In addition, a hole 211 a for passing a power line is provided in the bottom surface 211 of the recess 21 at the center in the longitudinal direction of the instrument body 2. Furthermore, two holes 211b are formed in the bottom surface 211 of the recess 21 to allow the suspension bolts to pass therethrough. Each of the two holes 211b is formed between each end in the longitudinal direction of the instrument body 2 and the center of the instrument body 2.

  Furthermore, end caps 23 are attached to both ends of the instrument body 2 in the longitudinal direction.

  The light source unit 1 includes a light source module 3, a mounting member 4, a power supply device 5, a terminal block 6, and a cover 7.

  The light source module 3 includes a printed wiring board 31 formed in a long rectangular plate shape, and a plurality of light source modules 3 mounted on one surface (lower surface) of the printed wiring board 31 along the longitudinal direction (left-right direction) of the printed wiring board 31. LED 32. At both ends in the longitudinal direction of the printed wiring board 31, a plurality of rectangular cutouts 312 are formed along the longitudinal direction. The plurality of notches 312 are formed at positions corresponding to the caulking portions 43 formed on the mounting member 4 described later.

  As shown in FIG. 2, the attachment member 4 is formed in a U shape when viewed from the longitudinal direction (left-right direction) by bending a long sheet metal. The attachment member 4 includes a bottom surface portion 41 formed in a rectangular plate shape, and a pair of side surface portions 42 extending upward from both ends of the bottom surface portion 41 in the short direction (front-rear direction). A rectangular recess 411 for accommodating the light source module 3 is formed in the center of the bottom surface portion 41 in the short direction along the longitudinal direction (left-right direction) of the bottom surface portion 41 (see FIG. 1). reference). Each of the side surfaces 42 has a pair of front end portions 421 formed by being bent into an arc shape in a direction away from each other (outward) in the short side direction of the bottom surface portion 41 at the front end. Each of a pair of front-end | tip parts 421 is formed over the full length along the longitudinal direction of the attachment member 4. As shown in FIG.

  As shown in FIG. 1, the attachment member 4 further includes a plurality of caulking portions 43. Each of the plurality of caulking portions 43 is formed by cutting and raising a part of the concave portion 411 at both ends of the concave portion 411 in the front-rear direction. As shown in FIG. 3, each of the plurality of caulking portions 43 is positioned so as to correspond one-to-one with the notch 312 of the light source module 3 when the light source module 3 is attached to the attachment member 4. Each of the plurality of caulking portions 43 is bent inward in the short direction of the mounting member 4, so that the mounting member 4 holds the light source module 3.

  As shown in FIG. 4, a hook fitting 91 is attached to the upper surface of the attachment member 4. The hook metal 91 is formed in a step shape along the vertical direction by bending a sheet metal, and includes a lower step 911 and an upper step 912 (see FIG. 2). The lower stage 911 of the hook 91 is attached to the upper surface of the attachment member 4 as shown in FIG. A tip 913 of the upper stage 912 of the hook 91 is formed by bending downward. Further, a locking spring 92 formed by winding a wire spring in a coil shape is attached to the upper surface of the attachment member 4. Further, as shown in FIG. 4, the attachment member 4 includes a hole 44 for passing the cable 82 led out from the power supply device 5.

  As illustrated in FIG. 5, the power supply device 5 includes a printed circuit board 51, a case 52, and an insulating sheet 53.

  The printed circuit board 51 includes a printed wiring board 511, a plurality of circuit components 512, a first connector 513, and a second connector 514.

  The printed wiring board 511 is formed in a rectangular plate shape that is long in the left-right direction. The plurality of circuit components 512, the first connector 513, and the second connector 514 are mounted on the component surface (one surface) 511a of the printed wiring board 511. A power cable 81 is connected to the first connector 513. One end of the cable 82 is connected to the second connector 514.

  An AC voltage is supplied from the commercial power supply 500 to the power supply device 5 through the power cable 81 (see FIG. 4). The power supply device 5 supplies a direct current voltage to the light source module 3 via the cable 82 connected to the second connector 514.

  The printed circuit board 51 constitutes a power supply circuit 50 that converts the AC voltage from the commercial power source 500 shown in FIG. 6 into a DC voltage, supplies the DC voltage to the plurality of LEDs 32, and turns them on. The power supply circuit 50 includes a rectifier circuit 501, a smoothing circuit 502, a step-down chopper circuit 503, a control circuit 504, and a load current detection unit 505.

  The rectifier circuit 501 includes a third capacitor C3 and a diode bridge DB1. Each of the third capacitor C3 and the diode bridge DB1 is a circuit component 512. Both ends of the third capacitor C3 and the input side of the diode bridge DB1 are electrically connected between both poles of an AC power supply (commercial power supply) 500 via a first connector 513. The diode bridge DB1 performs full-wave rectification on the input AC voltage.

  The smoothing circuit 502 includes a first diode D1, a second diode D2, a third diode D3, a first capacitor C1, and a second capacitor C2. The first diode D1, the second diode D2, the third diode D3, the first capacitor C1, and the second capacitor C2 are circuit components 512. The positive electrode of the first capacitor C1 is electrically connected to the positive electrode side of the output of the rectifier circuit 501. The negative electrode of the first capacitor C1 is electrically connected to the anode of the second diode D2. The cathode of the second diode D2 is electrically connected to the positive electrode of the second capacitor C2. The negative electrode of the second capacitor C2 is electrically connected to the negative electrode side of the output of the rectifier circuit 501. In other words, a series circuit including the first capacitor C1, the second diode D2, and the second capacitor C2 is electrically connected between the output terminals of the rectifier circuit 501.

  The cathode of the first diode D1 is electrically connected to the negative electrode of the first capacitor C1. The anode of the first diode D1 is electrically connected to the negative side of the output of the rectifier circuit 501. The cathode of the third diode D3 is electrically connected to the positive side of the output of the rectifier circuit 501. The anode of the third diode D3 is electrically connected to the positive electrode of the second capacitor C2.

  The smoothing circuit 502 divides the voltage rectified by the rectifier circuit 501 by the first capacitor C1 and the second capacitor C2, and outputs the divided voltage. For example, when the first capacitor C1 and the second capacitor C2 are capacitors having the same capacity, the smoothing circuit 502 smoothes the voltage output from the rectifier circuit 501, divides the voltage into half, and outputs the divided voltage.

  The step-down chopper circuit 503 includes a fourth diode D4, a fourth capacitor C4, a switching element Q1, and a transformer T1. Each of the fourth diode D4, the fourth capacitor C4, the switching element Q1, and the transformer T1 is a circuit component 512. The switching element Q1 is an N-channel power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). The cathode of the fourth diode D4 is electrically connected to the positive electrode side of the output of the smoothing circuit 502. One end of the fourth capacitor C4 is electrically connected to the output side of the smoothing circuit 502. The anode of the fourth diode D4 is electrically connected to the drain of the switching element Q1. The source of the switching element Q1 is electrically connected to the negative side of the output of the smoothing circuit 502. The primary winding L1 of the transformer T1 is electrically connected between the anode of the fourth diode D4 and the other end of the fourth capacitor C4. One end of the secondary winding L2 of the transformer T1 is electrically connected to the negative electrode of the output of the smoothing circuit 502. The other end of the secondary winding L2 of the transformer T1 is electrically connected to the control circuit 504.

  The step-down chopper circuit 503 steps down the voltage output from the smoothing circuit 502 to a voltage suitable for lighting the plurality of LEDs 32. A series circuit composed of a plurality of LEDs 32 is electrically connected via a second connector 514 between both ends of the fourth capacitor C4.

  The control circuit 504 includes a circuit component 512 such as a microcomputer. The control circuit 504 is electrically connected to the gate of the switching element Q1. The control circuit 504 adjusts the dimming level of the LED 32 by performing on / off control of the switching element Q1 based on a dimming signal or the like.

  The load current detection unit 505 includes a circuit component 512 such as a shunt resistor, and outputs a current flowing through the LED 32 to the control circuit 504 as a measurement signal.

  As shown in FIG. 5, the case 52 is made of metal and has a bottom wall 521 that is long in the left-right direction, a side wall 522 that extends downward from the outer peripheral edge of the bottom wall 521, and an opening 523. And is formed in a rectangular box shape. As shown in FIG. 2, the case 52 has an opening 526 through which the power cable 81 passes through the left side wall 522. The opening 526 is formed at a position where the terminal portion of the first connector 513 of the printed circuit board 51 can face from the outside of the case 52 when the printed circuit board 51 is accommodated in the case 52.

  As shown in FIGS. 7 and 8, the case 52 has three holding pieces 524 (see FIG. 7) that hold the printed circuit board 51 on the side wall 522 in the front-rear direction, and one-to-one correspondence with the three holding pieces 524. One locking piece 525 (see FIG. 8). More specifically, one of the three holding pieces 524 is formed on the right end side of the rear side wall 522, and each of the remaining two holding pieces 524 is the front side wall 522, It is formed on each of both ends in the direction. The three holding pieces 524 are formed by cutting and raising a part of the side wall 522 inside the case 52. Each of the three locking pieces 525 is formed by cutting and raising a part of the side wall 522 below each of the corresponding three holding pieces 524.

  By the way, the printed circuit board 51 is accommodated in the case 52 so that the component surface 511a faces the opening 523 as shown in FIG. At this time, as shown in FIGS. 7 and 8, the printed circuit board 51 is sandwiched between the three holding pieces 524 and the three locking pieces 525 and fixed to the case 52. That is, the three holding pieces 524 restrict the printed circuit board 51 from moving upward. Further, the three locking pieces 525 are bent toward the inside of the case 52 to restrict the printed circuit board 51 from moving downward. By fixing the printed circuit board 51 inside the case 52 as described above, a space is provided between the printed circuit board 51 and the bottom wall 521 of the case 52. By providing a space between the printed board 51 and the bottom wall 521 of the case 52, the insulating property of the printed board 51 is ensured.

  As shown in FIG. 5, the insulating sheet 53 is formed of a material such as a resin, and has a rectangular sheet body 531 elongated in the left-right direction, and a pair of side portions protruding upward from both ends in the front-rear direction of the sheet body 531. 532. As shown in FIGS. 9A, 9B, and 9C, the sheet main body 531 of the insulating sheet 53 includes a notch 533 formed by being cut out at the right end on the front side, and a rectangular opening 534 on the left side and the rear side. And a cut-and-raised piece 535 cut into a semicircular arc shape on the right side and the front side, and a protrusion 536. The protruding portion 536 protrudes upward by embossing and is formed into a bottomed cylindrical shape. The protrusion 536 is formed on one end side (right end side) of the sheet main body 531.

  As shown in FIG. 7, the insulating sheet 53 is accommodated in the case 52 so that the component surface 511 a of the printed circuit board 51 and the sheet main body 531 of the insulating sheet 53 face each other. At this time, the insulating sheet 53 is accommodated in the case 52 so that the pair of side portions 532 face upward (see FIG. 5). The insulating sheet 53 is accommodated in the case 52 so that the sheet main body 531 is parallel to the printed wiring board 511 of the printed circuit board 51 in the vertical direction. The insulating sheet 53 is disposed between the printed board 51 and the attachment member 4 (see FIG. 1). The cut-and-raised piece 535 is cut downward to restrict the insulating sheet 53 from moving downward due to the tip of the cut-and-raised piece 535 coming into contact with the concave portion 411 of the mounting member 4. Further, since the insulating sheet 53 is accommodated inside the case 52 so that the pair of side portions 532 contacts the inside of the side wall 522 in the front-rear direction of the case 52, movement in the front-rear direction is regulated. Furthermore, since the insulating sheet 53 is accommodated inside the case 52 so that the left and right ends of each of the pair of side portions 532 are in contact with the inside of the side wall 522 in the left and right direction of the case 52, the movement in the left and right direction is restricted. The

  The case 52 is attached to the attachment member 4 using, for example, a screw so that the opening 523 faces the upper surface of the bottom surface portion 41 of the attachment member 4.

  As shown in FIG. 1, the terminal block 6 includes a terminal block 61 formed in a rectangular box shape, and a mounting bracket 62 for mounting the terminal block 61 to the mounting member 4. The terminal block 61 is connected to a power line that passes through the ceiling material and is exposed to the outside of the room. The power supply device 5 is supplied with AC voltage from the outside via the terminal block 61.

  The cover 7 has an opening on the upper side made of a light diffusing material, for example, milky white acrylic resin, and is formed in a long shape. The cover 7 has a diffusing surface 71 formed in a semicircular arc shape so that a protruding amount increases downward from both end sides toward the center side in the short direction (front-rear direction). As shown in FIG. 2, the opening edge of the recess 21 of the instrument body 2 and the tip end of the cover 7 are contacted in the vertical direction when the light source unit 1 is attached to the instrument body 2 at both ends in the front-rear direction. Each extending portion 72 is provided. Further, projecting wall portions 73 projecting upward are provided along the longitudinal direction (left-right direction) of the cover 7 over the entire length, inside the front-rear direction of each of the extending portions 72 of the cover 7. Each distal end of the protruding wall portion 73 has a protruding portion 731 protruding inward.

  The assembly procedure of the light source unit 1 will be described. The assembly procedure described below is an example, and the light source unit 1 can be assembled by a procedure other than the following description.

  First, the worker attaches the power supply device 5 in which the printed circuit board 51 and the insulating sheet 53 are previously accommodated in the case 52 and the terminal block 6 to the upper surface of the attachment member 4. Further, the worker connects the power supply device 5 and the terminal block 6 with the power cable 81. Next, the worker places the light source module 3 in the recess 411 formed in the bottom surface portion 41 of the mounting member 4. At this time, the worker attaches the light source module 3 to the attachment member 4. In other words, the light source module 3 is attached to the attachment member 4 so that the surface opposite to the surface on which the plurality of LEDs 32 are mounted contacts the recess 411 of the attachment member 4. Then, the operator bends the caulking portion 43 inward to fix the light source module 3 to the mounting member 4.

  Further, the operator passes the cable 82 led out from the light source module 3 through the hole 44 formed in the mounting member 4, and then connects one end to the second connector 514 of the power supply device 5. Finally, the operator attaches the cover 7 to the attachment member 4 with the opening of the cover 7 facing upward. At this time, the protrusion 731 provided on each of the protruding wall portions 73 of the cover 7 is hooked on the tip portion 421 formed on the side surface portion 42 of the attachment member 4, whereby the cover 7 is held by the attachment member 4.

  The construction procedure of the lighting fixture 10 will be described. In addition, the construction procedure to be described below is an example, and the lighting fixture 10 can be constructed by a procedure other than the following description. First, the operator passes a power line exposed outside the room through a hole 211 a formed in the instrument body 2. Then, the operator passes the suspension bolt exposed outside the room through the ceiling material through the hole 211b, and screws the nut into the suspension bolt, thereby fixing the instrument body 2 to the ceiling material.

  Next, the operator inserts one end of the hook metal fitting 91 attached to the attachment member 4 in advance into a hole provided in the side surface of the recess 21 of the instrument main body 2. At this time, the light source unit 1 is suspended from the instrument body 2 by the tip of the hook 91 being hooked on the side surface of the recess 21. The operator connects the power line to the terminal block 61 in a state where the light source unit 1 is suspended from the instrument body 2. Further, the operator connects both ends of the locking spring 92 to the terminal block 61 formed on the instrument body 2. Further, the operator attaches the light source unit 1 to the instrument body 2 by hooking both ends of the latch spring 92 to a latching portion formed on the instrument body 2. At this time, at least the power supply device 5 and the terminal block 6 are accommodated in the recess 21 of the instrument body 2.

  By the way, as shown in FIG. 8, the insulating sheet 53 is accommodated inside the case 52 so that the notch 533 is disposed on the second connector 514 side. That is, the insulating sheet 53 is accommodated in the case 52 so that the second connector 514 of the printed circuit board 51 can face the notch 533 from below. As described above, when the insulating sheet 53 is correctly disposed inside the case 52, one end of the cable 82 can be connected from the lower side of the second connector 514. In addition, when the insulating sheet 53 is correctly disposed inside the case 52, a desired circuit component 512, such as a variable resistor, can be exposed from the opening 534 of the insulating sheet 53. By correctly arranging the insulating sheet 53 inside the case 52, the operator can easily adjust the circuit component 512 that requires adjustment, such as variable resistance, through the opening 534.

  Further, when the insulating sheet 53 is correctly disposed inside the case 52, the protruding portion 536 is formed so as not to contact any of the circuit components 512 of the printed circuit board 51. By correctly disposing the insulating sheet 53 inside the case 52, the insulating sheet 53 is accommodated inside the case 52 so that the sheet main body 531 is parallel to the printed wiring board 511 in the vertical direction.

  The insulating sheet 53 needs to be arranged in the correct orientation inside the case 52. However, when the operator accommodates the insulating sheet 53 in the case 52, the worker rotates 180 degrees so that the notch 533 of the insulating sheet 53 is positioned on the first connector 513 side (hereinafter referred to as the reverse direction). Therefore, there is a possibility of being housed inside the case 52. As shown in FIG. 8, the insulating sheet 53 is not formed point-symmetrically with the center of the sheet body 531 as the center point. Therefore, when the insulating sheet 53 is disposed in the reverse direction, the notch 533 and the opening 534 may be located at a place where the insulating sheet 53 needs to be covered. That is, when the insulating sheet 53 is disposed in the reverse direction, the place originally covered with the insulating sheet 53 is exposed, and the insulating property of the printed circuit board 51 may be deteriorated.

  Therefore, as shown in FIG. 10, the protrusion 536 comes into contact with at least one circuit component 512 of the circuit components 512 mounted on the printed circuit board 51 when the insulating sheet 53 is disposed in the case 52 in the reverse direction. It is formed in the position. That is, when the insulating sheet 53 is disposed in the reverse direction, the tip of the protrusion 536 comes into contact with the circuit component 512. Then, the sheet main body 531 of the insulating sheet 53 is arranged so as to be inclined in the vertical direction with respect to the printed wiring board 511. Therefore, the case 52 cannot accommodate at least a part of the insulating sheet 53 therein.

  As described above, when the insulating sheet 53 is disposed in the case 52 in the reverse direction, at least a part of the insulating sheet 53 is not accommodated in the case 52, so that the operator may mistakenly put the insulating sheet 53. You can easily notice.

  More specifically, when attaching the insulating sheet 53 to the case 52, the operator easily notices a mistake when the protruding portion 536 contacts the circuit component 512 even if the insulating sheet 53 is attached in the reverse direction. Can do. Further, when the operator tries to attach the power supply device 5 to the attachment member 4 with the insulating sheet 53 attached to the case 52 in the reverse direction, the insulating sheet 53 is not accommodated inside the case 52. It cannot attach to the attachment member 4, and can easily recognize a mistake.

  If the operator can easily notice the mistake in inserting the insulating sheet 53, the possibility of assembling the light source unit 1 with the insulating sheet 53 disposed in the opposite direction is reduced. The insulating property of the printed circuit board 51 can be ensured by correctly accommodating the insulating sheet 53 in the case 52.

  In addition, although the protrusion part 536 of this embodiment is formed in the bottomed cylindrical shape with a flat tip by embossing, it does not need to be limited to this. As shown in FIGS. 11A, 11B, and 11C, the protruding portion 536 may be formed in a square tube shape with a bottom having a flat surface. Further, the protruding portion 536 may be formed in a solid (solid) columnar shape. Furthermore, the tip end surface of the protrusion 536 may be formed into a curved surface by embossing. Further, the protrusion 536 may be hollow or solid, and may have a frustum shape whose tip is formed narrower than the base end. Further, the protruding portion 536 may be hollow or solid, and may have a cone shape whose tip is formed narrower than the base end.

  Further, when the sheet body 531 of the insulating sheet 53 is accommodated in the case 52 so as to be parallel to the printed wiring board 511 in the vertical direction, the protruding portion 536 is formed so that the protruding portion 536 contacts the circuit component 512. May be. Furthermore, the power supply device 5 may have an insulating sheet between the printed circuit board 51 and the bottom wall 521 of the case 52.

  A modification of the power supply device 5 of the present embodiment will be described with reference to FIGS. In the power supply device 5 of the modification, the shape of the protrusion 536a is different from the above-described protrusion 536. As shown in FIGS. 12A, 12B, and 12C, the protruding portion 536a of the modification is formed by bending one end (right end side) of the sheet body 531 of the insulating sheet 53 upward. In other words, the protruding portion 536a is formed by cutting and raising the right end on the rear side of the notch 533 upward. When the insulating sheet 53 is accommodated in the case 52 in the correct orientation, the protruding portion 536a is formed so as not to contact any of the circuit components 512 of the printed circuit board 51, as shown in FIG. The That is, when the insulating sheet 53 is accommodated in the case 52 in the correct orientation, the insulating sheet 53 is accommodated in the case 52 so that the sheet body 531 is parallel to the printed wiring board 511 in the vertical direction. Yes.

  Here, when the insulating sheet 53 is disposed in the case 52 in the reverse direction, as shown in FIG. 14, the protruding portion 536 a is formed so as to contact the circuit component 512, for example, the first connector 513. That is, when the insulating sheet 53 is disposed in the case 52 in the opposite direction, the sheet main body 531 is disposed so as to be inclined with respect to the printed wiring board 511 when the protruding portion 536 a contacts the first connector 513. The Therefore, at least a part of the insulating sheet 53 is not accommodated in the case 52.

  By using the insulating sheet 53 according to the modified example, even if the operator arranges the insulating sheet 53 in the case 52 in the reverse direction, it is possible to easily notice a mistake in inserting the insulating sheet 53. If the operator can easily notice the mistake in inserting the insulating sheet 53, the possibility of assembling the light source unit 1 with the insulating sheet 53 disposed in the opposite direction is reduced. The insulating property of the printed circuit board 51 can be ensured by correctly accommodating the insulating sheet 53 in the case 52.

  The power supply device 5 of this embodiment includes a case 52, a printed circuit board 51, and an insulating sheet 53. The case 52 is formed in a box shape having an opening 523. A plurality of components (circuit components) 512 are mounted on at least one surface (component surface) 511 a of the printed circuit board 51, and the one surface 511 a is accommodated inside the case 52 so as to face the opening 523 of the case 52. The insulating sheet 53 includes a sheet body 531 and projecting portions 536 and 536a projecting from one surface (upper surface) of the sheet body 531. The protrusions 536 and 536 a are arranged so that the tips thereof face the one surface 511 a of the printed circuit board 51 accommodated in the case 52. The protruding portions 536 and 536a are formed so as not to contact any of the plurality of components 512 of the printed circuit board 51 accommodated in the case 52 when the insulating sheet 53 is disposed at a desired position with respect to the printed circuit board 51. The entire insulating sheet 53 is accommodated in the case 52. The protrusions 536 and 536a are formed so as to contact any of the plurality of components 512 when the insulating sheet 53 is not disposed at a desired position with respect to the printed circuit board 51, and a part of the insulating sheet 53 is a case. 52 is housed inside.

  Since the power supply device 5 of this embodiment is configured as described above, it can be easily found that the insulating sheet 53 is arranged in the wrong direction (reverse direction), and the insulating sheet 53 is wrong. It can suppress that it accommodates in case 52 by direction.

  In the power supply device 5 of the present embodiment, it is preferable that the protrusion 536 is hollow and has a curved end surface.

  If the power supply device 5 of this embodiment is comprised as mentioned above, the protrusion part 536 can be easily formed by embossing. Furthermore, when the tip surface of the protrusion 536 is formed into a curved surface by embossing, the force in the pulling direction applied to the insulating sheet 53 is reduced.

  In the power supply device 5 of the present embodiment, it is preferable that the appearance of the protruding portion 536 is formed in a shape that becomes narrower as it approaches the tip.

  When the power supply device 5 of the present embodiment is configured as described above, when the insulating sheet 53 is correctly arranged in the case 52, the printed wiring board 511 is compared with the case where the appearance of the protruding portion 536 is a columnar shape. The protrusion 536 can be arranged in the narrower space above. Therefore, the printed wiring board 511 can be reduced in size.

  The light source unit 1 of the present embodiment includes a power supply device 5 and a light source 32 to which power is supplied by the power supply device 5.

  Since the light source unit 1 of the present embodiment is configured as described above, it can be easily found that the insulating sheet 53 is arranged in the wrong direction (reverse direction), and the insulating sheet 53 is in the wrong direction. Therefore, it is possible to prevent the case 52 from being accommodated.

  The lighting fixture 10 of this embodiment includes a light source unit 1 and a fixture body 2 that houses the light source unit 1.

  Since the lighting fixture 10 of this embodiment is comprised as mentioned above, it can discover easily that the insulating sheet 53 is arrange | positioned in the wrong direction (reverse direction), and the insulating sheet 53 is in the wrong direction. Therefore, it is possible to prevent the case 52 from being accommodated.

DESCRIPTION OF SYMBOLS 1 Light source unit 10 Lighting fixture 2 Appliance main body 32 Light source 5 Power supply device 51 Printed circuit board 511a Component surface (one surface)
512 Circuit components (components)
52 Case 523 Opening 53 Insulating Sheet 531 Sheet Main Body 536, 536a Projection

Claims (5)

Case and
A printed circuit board,
With an insulating sheet,
The case is formed in a box shape having an opening,
The printed circuit board has a plurality of components mounted on at least one surface, and is housed inside the case so that the one surface faces the opening of the case,
The insulating sheet has a sheet main body and a protruding portion protruding from one surface of the sheet main body, and a tip of the protruding portion is disposed so as to face the one surface of the printed circuit board accommodated in the case,
The protrusion is formed so as not to contact any of the plurality of components of the printed circuit board accommodated in the case when the insulating sheet is disposed at a desired position with respect to the printed circuit board. The entire insulating sheet is accommodated inside the case,
The protrusion is formed so as to come into contact with any of the plurality of components when the insulating sheet is not disposed at the desired position with respect to the printed circuit board, and a part of the insulating sheet is formed in the case. A power supply device housed in the interior of the power supply. The power supply device according to claim 1, wherein the projecting portion is hollow and has a curved end surface. The power supply device according to claim 1, wherein an appearance of the protrusion is formed in a shape that becomes narrower as it approaches the tip. A light source unit comprising: the power supply device according to claim 1; and a light source to which power is supplied by the power supply device. An illumination fixture comprising: the light source unit according to claim 4; and a fixture main body that houses the light source unit.

Images