JP6857848B2 - lighting equipment - Google Patents

Description

The present invention relates generally to luminaires, and more specifically to luminaires capable of varying the dimming level of a light source.

As a conventional example, a spotlight (lighting fixture) with a dimmer described in Patent Document 1 will be illustrated. In this conventional example, a dimming box having a built-in dimming device is provided between a universal metal fitting attached to a spotlight lamp body and a mounting metal fitting attached to a ceiling or the like. Further, the dimming box is provided with a dimming knob so that the dimming state of the light source can be adjusted by rotating the dimming knob.

JP-A-59-119607

By the way, for example, due to deterioration of the volume (variable resistor) that rotates integrally with the knob, the correspondence between the rotation angle of the knob and the dimming state (dimming level) of the light source may deviate. .. That is, even if the knob is turned to a rotation position corresponding to a dimming level of 10 [%] at the time of manufacture, the actual light source may be turned on at a dimming level of 20 [%]. .. However, the conventional example described in Patent Document 1 does not have a correction function for eliminating such a deviation.

Further, apart from the dimming knob, it is conceivable to provide the dimming box with a correction knob having such a correction function. However, there is a possibility that an operator who adjusts the dimming level by using the dimming knob may mistakenly operate the correction knob as the dimming knob.

The present invention has been made in view of the above reasons, and an object of the present invention is to provide a lighting fixture capable of improving workability and suppressing a decrease in adjustment accuracy of a dimming level.

The luminaire according to one aspect of the present invention includes a light source, a control unit that controls dimming of the light source, a correction volume, and a cylindrical housing. The housing houses the light source, the control unit, and the correction volume. The housing has a cylindrical first cylinder and a cylindrical second cylinder. The first cylinder has an outlet for emitting light emitted from the light source at the first end in the axial direction thereof. The second cylinder is rotatably attached to the first cylinder at a second end of the first cylinder opposite to the first end, with the central axis of the first cylinder as a rotation axis. .. The control unit changes the dimming level of the light source according to the rotation angle of the second cylinder, and further, the rotation angle of the second cylinder and the control unit according to the adjustment position of the operation unit of the correction volume. Correct the correspondence with the dimming level. The second cylinder has an operation hole that connects the internal space of the housing in which the correction volume is housed and the external space of the housing. The portion of the second cylinder in which the operation hole is provided is a portion facing the operation portion when the rotation angle of the second cylinder is equal to a predetermined rotation angle.

The present invention has an advantage that workability can be improved and a decrease in dimming level adjustment accuracy can be suppressed.

FIG. 1 is a perspective view including a partial cross section of the luminaire according to the embodiment of the present invention as viewed from the rear. FIG. 2 is a perspective view of the same lighting fixture attached to the wiring duct. FIG. 3 is a schematic circuit block diagram of the lighting fixture of the same. FIG. 4 is an exploded perspective view of a main part of the same lighting fixture. FIG. 5 is a perspective view of the lighting fixture of the same as seen from the back side of the second cylinder. FIG. 6 is a plan view of a main part of the same lighting fixture. FIG. 7 shows a main part of the lighting fixture of the same as above, and is a cross-sectional view taken along the line AA of FIG. FIG. 8 is a plan view of the lighting fixture in the same state during transportation or storage. FIG. 9A is a rear view in a state where the operation hole and the through hole of the same lighting fixture do not match. FIG. 9B is a rear view in a state where the operation hole and the through hole of the lighting fixture of the same are matched. FIG. 10A is a plan view of a main part in a modified example of the lighting fixture of the same. FIG. 10B is a plan view of a main part in the above modified example. FIG. 10C is a side view of a main part in the same modified example.

(1) Outline The following embodiment is only one of various embodiments of the present invention. The following embodiments can be variously modified according to the design and the like as long as the object of the present invention can be achieved.

As an example, the luminaire 1 of the present embodiment is configured as a spotlight attached to the wiring duct 13 as shown in FIG. As shown in FIG. 1, the luminaire 1 includes a light source 2, a control unit 34 (see FIG. 3) that controls dimming of the light source 2, and a cylindrical housing 4. Further, the luminaire 1 includes a correction volume 17 as shown in FIGS. 3 and 4. The housing 4 houses the light source 2, the control unit 34, and the correction volume 17.

As shown in FIGS. 1 and 2, the housing 4 has a cylindrical first cylinder 41 and a cylindrical second cylinder 42. The first tubular body 41 has an exit port 410 that emits light emitted from a light source 2 at a first end (front end in FIG. 1) in the axial direction (front-back direction in FIG. 1). The second cylinder 42 is a first cylinder at a second end (rear end in FIG. 1) opposite to the first end of the first cylinder 41, with the central axis A1 of the first cylinder 41 as a rotation axis. It is rotatably attached to 41.

In the present embodiment, the central axis A1 of the first tubular body 41 coincides with the central axis of the second tubular body 42. That is, the first cylinder 41 and the second cylinder 42 are assembled so that their central axes coincide with each other to form one cylindrical housing 4. The "cylindrical shape" referred to here is not limited to a strict cylindrical shape, and for example, a part of the outer peripheral surface of the first tubular body 41 or the second tubular body 42 may be slightly recessed. In the present embodiment, as shown in FIGS. 1 and 2, the outer diameter of the second cylinder 42 is set to be substantially equal to the outer diameter of the first cylinder 41 as an example.

The control unit 34 is configured to change the dimming level of the light source 2 according to the rotation angle of the second cylinder 42. Further, the control unit 34 is configured to correct the correspondence between the rotation angle of the second cylinder 42 and the dimming level according to the adjustment position of the operation unit 170 of the correction volume 17. In the present embodiment, the second tubular body 42 is an operation unit that receives an operation of an operator who adjusts the dimming state (dimming level) of the light source 2. Since the correction volume 17 of the present embodiment is a rotary volume as an example, the adjustment position of the operation unit 170 is a rotation position (rotation angle). However, the correction volume 17 may be a slide volume other than the rotary volume.

Hereinafter, for convenience of explanation, the work of turning the second cylinder 42 to adjust the dimming level of the light source 2 is referred to as "first work", and the person who performs the first work is referred to as "first worker". On the other hand, the work of turning the operation unit 170 of the correction volume 17 to eliminate the deviation caused in the corresponding relationship is called a "second work", and the person who performs the second work is called a "second worker". Needless to say, the first worker (or the second worker) may perform both the first work and the second work.

Here, the second tubular body 42 has an operation hole 18 as shown in FIGS. 1 to 2, 4 to 5, and 9A and 9B. The operation hole 18 is a hole that connects the internal space of the housing 4 in which the correction volume 17 is housed and the external space of the housing 4. The portion of the second cylinder 42 where the operation hole 18 is provided is a portion facing the operation unit 170 when the rotation angle of the second cylinder 42 is equal to a predetermined rotation angle (see FIG. 9B).

According to this configuration, the correction volume 17 is housed in the housing 4, and the operation hole 18 is the operation unit 170 of the correction volume 17 when the rotation angle of the second cylinder 42 is equal to a predetermined rotation angle. Facing. Therefore, the second operator rotates the second cylinder 42 so that the second cylinder 42 has a predetermined rotation angle, inserts the tip of a tool such as a screwdriver through the operation hole 18, and inserts the tip of the tool such as a screwdriver through the operation hole 18 to obtain the correction volume 17. The second operation can be performed by turning the operation unit 170. Therefore, even if there is a deviation in the corresponding relationship, the deviation can be eliminated.

Further, as compared with the case where the operation unit 170 or the knob (for turning the operation unit 170) is provided so as to project from the outer peripheral surface 4A of the housing 4, when the first operator performs the first work, It is possible to reduce the possibility of accidentally operating the operation unit 170 or the knob. In particular, when the second cylinder 42 is at a rotation angle other than the predetermined rotation angle, the operation unit 170 of the correction volume 17 cannot be operated, so that the possibility that the correction volume 17 is easily operated is reduced. be able to. Further, as compared with the case where the operation unit 170 or the knob is provided so as to project from the outer peripheral surface 4A of the housing 4, the design (appearance) of the lighting fixture 1 as a whole can be improved.

Therefore, the luminaire 1 of the present embodiment can improve workability and suppress a decrease in the adjustment accuracy of the dimming level.

(2) Details (2.1) Overall configuration Hereinafter, the lighting fixture 1 of the present embodiment will be described in detail with reference to FIGS. 1 to 9B. In the following, unless otherwise specified, the vertical, horizontal, and front-back directions of the luminaire 1 will be described by defining them using the up-down, left-right, and front-back arrows shown in FIG. These arrows are provided for the purpose of assisting explanation only and are not accompanied by substance. Further, the above-mentioned provision of the direction does not mean to limit the usage mode of the lighting fixture 1 of the present embodiment.

As shown in FIG. 1, the luminaire 1 includes a light source 2, a lighting device 3 (see FIG. 3), and a housing 4. Further, as shown in FIGS. 3 to 4 and 7, the luminaire 1 further includes a dimming volume (variable resistor) 6 and a correction volume (variable resistor) 17. Further, as shown in FIG. 1, the luminaire 1 further includes an optical lens 8, a reflecting member 9, a baffle 10 for suppressing glare, an arm 11, a wire 12 for preventing falling, a plug 14, and the like. As shown in FIG. 2, the luminaire 1 is configured as a spotlight attached to a wiring duct 13 provided on the ceiling in a building such as an art museum or a museum as an example.

(2.2) Light Source The light source 2 has, for example, at least one LED (Light Emitting Diode) chip, a rectangular plate-shaped mounting substrate on which an LED chip is mounted, and a holder that supports them. Further, the light source 2 has, for example, a heat conductive sheet for conducting heat generated from an LED chip or the like, a heat radiating member, or the like.

The LED chip is, for example, a blue light emitting diode that emits blue light. Further, the mounting surface of the mounting substrate on which the LED chip is mounted is sealed with a sealing resin mixed with a fluorescent substance (for example, a yellow phosphor) that converts the wavelength of blue light emitted from the LED chip. A cathode electrode and an anode electrode are formed at a pair of corner portions diagonally located on the mounting surface of a rectangular plate-shaped mounting substrate. The light source 2 is configured to emit white illumination light by applying a DC voltage output from the lighting device 3 to the anode electrode and the cathode electrode.

(2.3) Housing (2.3.1) Overall configuration of the housing As shown in FIGS. 1 and 2, the housing 4 is formed in a cylindrical shape as a whole. The housing 4 has a first cylindrical body 41 formed in a long cylindrical shape and a second tubular body 42 formed in a flat cylindrical shape. The central axis A1 of the first tubular body 41 coincides with the central axis of the second tubular body 42. That is, the first cylinder 41 and the second cylinder 42 are assembled so that their central axes coincide with each other to form one cylindrical housing 4.

(2.3.2) First Cylinder The first cylinder 41 has an outlet 410 at its first end (front end in FIG. 1) in the axial direction thereof. At the second end (rear end in FIG. 1) opposite to the first end of the first cylinder 41, the second cylinder 42 is rotatably attached. The first tubular body 41 is configured by, for example, two cylindrical members (light source accommodating portion 411 and power accommodating portion 412) each formed by aluminum die casting are assembled to each other along the axial direction. A plurality of ribs having screw holes are formed on the inner peripheral surface of the light source accommodating portion 411, and a plurality of ribs having through holes are formed on the inner peripheral surface of the power supply accommodating portion 412. With a part of the light source accommodating portion 411 (rear end portion in FIG. 1) inserted through the opening of the power accommodating portion 412, a screw is passed through the through hole of the power accommodating portion 412, and further, a screw hole of the light source accommodating portion 411. The light source accommodating portion 411 and the power accommodating portion 412 are connected to each other by being screwed into.

The light source accommodating portion 411 is formed in a bottomed cylindrical shape with one end (front end in FIG. 1) open in the axial direction, and has a dimension of about half of the length dimension of the power accommodating portion 412 in the axial direction. Have. The light source accommodating unit 411 accommodates the light source 2 inside, and emits the light emitted from the light source 2 from the exit port 410 at one open end. Specifically, the light source accommodating portion 411 has a recess on one surface of the bottom portion 411A (see FIG. 1) facing the exit port 410 for fitting the LED chip of the light source 2 and the holder supporting the mounting substrate. doing. The holder of the light source 2 is fixed to the bottom portion 411A by screwing or the like.

Further, as shown in FIG. 1, the light source accommodating portion 411 accommodates the optical lens 8, the reflecting member 9, and the baffle 10. In the light source accommodating portion 411, the reflecting member 9, the optical lens 8, and the baffle 10 are arranged in order along the optical axis L1 from the light source 2 to the exit port 410. The optical axis L1 coincides with the central axis A1 of the first tubular body 41. On the inner peripheral surface of the light source accommodating portion 411, recesses for fitting the protrusions provided on the outer peripheral surfaces of the reflecting member 9 and the baffle 10 are formed along the circumferential direction.

The power supply accommodating portion 412 is formed in a cylindrical shape in which both ends in the axial direction are open. The power supply accommodating portion 412 is connected to the light source accommodating portion 411 on one end side (front end side in FIG. 1) in the axial direction, and the second cylinder 42 on the other end side (rear end side in FIG. 1) in the axial direction. Is rotatably attached.

The power supply accommodating unit 412 internally accommodates the lighting device 3, the dimming volume 6, and the correction volume 17. Specifically, as shown in FIG. 1, the power supply accommodating unit 412 has a substantially rectangular plate shape in which a plurality of electronic components 300 constituting various circuits described later of the lighting device 3 are mounted and elongated in the axial direction. The circuit board 301 and the metal holding plate 302 for holding the circuit board 301 are housed in the circuit board 301. The holding plate 302 is fixed to the bottom portion 411A of the light source accommodating portion 411 by screwing. The bottom portion 411A of the light source accommodating portion 411 has a hole penetrating in the thickness direction, and the electric wire 303 connected to the output end of the lighting device 3 passes through the hole as shown in FIG. It is electrically connected to the light source 2.

As shown in FIG. 7, the power supply accommodating unit 412 accommodates the volume substrate 60 on which the dimming volume 6 and the correction volume 17 are mounted on one surface (the surface facing the second cylinder 42). The volume substrate 60 is fixed to the holding plate 302 with screws 61 with an insulating sheet or the like interposed therebetween. The dimming volume 6 and the correction volume 17 are electrically connected to the lighting device 3 (control unit 34 described later).

The dimming volume 6 is arranged at the center of the mounting surface (the above-mentioned one surface) of the volume substrate 60 so that the central axis of the shaft portion 62 passes through the central axis A1 of the first cylinder 41. On the other hand, the correction volume 17 is arranged near the edge of the volume substrate 60, avoiding the dimming volume 6. Specifically, as an example, the correction volume 17 has a dimming volume 6 and a scale 5 (described later) of the dimming volume 6 and the scale 5 (described later) in the radial direction of the first cylinder 41 when viewed from the axial direction of the first cylinder 41. It is arranged on a straight line connecting the scale line on which "1" is written. In short, the correction volume 17 is arranged obliquely to the right of the dimming volume 6 when viewed from the axial direction of the first cylinder 41.

Further, the power supply accommodating unit 412 accommodates the regulation plate 63 as shown in FIGS. 4 and 7. The regulation plate 63 is formed of a metal material in a substantially disk shape. The regulation plate 63 is housed so as to be arranged between the volume substrate 60 and the second cylinder 42 in the internal space of the housing 4 in which the dimming volume 6 and the correction volume 17 are housed. The regulation plate 63 is a member for regulating the rotation range of the second cylinder 42. Two ribs having screw holes are provided on the inner peripheral surface of the power accommodating portion 412, and the regulation plate 63 is fixed to each of the two ribs by two screws 64 (see FIG. 4). Has been done.

As shown in FIG. 4, the regulation plate 63 has a square window hole 65 in the center for inserting the shaft portion 62 of the dimming volume 6. The regulation plate 63 has a pair of stoppers 66 formed by cutting a part thereof in a direction approaching the second tubular body 42. Each stopper 66 is formed in a rectangular plate shape. The pair of stoppers 66 regulate the rotatable angle range of the second tubular body 42 within a predetermined range (for example, within a range of 250 °) by coming into contact with the protrusion piece 424 described later of the second tubular body 42. .. Further, an insulating sheet 67 (see FIG. 4) is arranged between the regulation plate 63 and the volume substrate 60. The insulating sheet 67 has a circular through hole 670 in the center thereof. The shaft portion 62 of the dimming volume 6 protrudes toward the second tubular body 42 through the through hole 670 and further through the window hole 65 of the regulation plate 63.

Further, as shown in FIG. 4, the regulation plate 63 has a through hole 19 penetrating in the thickness direction of the regulation plate 63 in a region facing the operation unit 170 of the correction volume 17. The thickness direction of the regulation plate 63 is parallel to the axial direction of the first cylinder 41.

By the way, unlike the dimming volume 6, the correction volume 17 is a so-called semi-fixed type variable resistor. That is, unlike the dimming volume 6, the correction volume 17 is not a frequently operated volume. Therefore, the correction volume 17 does not have a shaft portion (shaft) extending perpendicular to the mounting surface of the volume substrate 60, and the operation portion 170 has a cross hole as an example. The cross hole is recessed in a direction away from the through hole 19. The second operator can change the rotation angle of the correction volume 17 by inserting the tip of a tool such as a screwdriver into the cross hole of the operation unit 170 and turning the operation unit 170. However, the correction volume 17 may have a shaft portion like the dimming volume 6. In this case, it is desirable that the tip of the shaft portion is provided with a groove into which the tip of a tool such as a flat-blade screwdriver can be inserted.

As shown in FIGS. 1 and 2, the power supply accommodating portion 412 has a pair of attachment portions 43 to which the tip portions of the pair of support portions 110A and 110B of the arm 11 are attached. Each mounting portion 43 has a through hole 430 (see FIG. 1) that connects to the inside of the power supply accommodating portion 412. The pair of mounting portions 43 are arranged in the regions at both ends in the left-right direction on the outer peripheral surface 412A of the power supply accommodating portion 412, respectively. Each mounting portion 43 is located substantially in the center of the power accommodating portion 412 in the direction along the central axis A1 (front-back direction in FIG. 1) when viewed from the left-right direction. Further, each mounting portion 43 is located substantially in the center of the power supply accommodating portion 412 in a direction orthogonal to the central axis A1 and the left-right direction (vertical direction in FIG. 1) when viewed from the left-right direction. The power accommodating portion 412 is rotatably supported by an arm 11 via a pair of mounting portions 43 with the shaft L2 (see FIG. 1) as a rotating shaft. In FIG. 1, the axis L2 is parallel to the left-right direction.

Here, as shown in FIGS. 1, 2 and 6, the outer peripheral surface 4A of the housing 4 is provided with a scale 5 that serves as a reference value for the dimming level of the light source 2. In the present embodiment, as an example, the scale 5 is provided along the circumferential direction D1 on the outer peripheral surface of the first tubular body 41, that is, the outer peripheral surface 412A of the power supply accommodating portion 412. The scale 5 is arranged in a region adjacent to the second tubular body 42 on the outer peripheral surface 412A.

The scale 5 is formed by means such as printing. Alternatively, a sticker on which the scale 5 is printed in advance may be attached to the outer peripheral surface 412A. Further, the scale 5 may be formed by forming irregularities on the outer peripheral surface 412A by etching and pouring paint into the concave portions.

The scale 5 is provided in the first region B1 (see FIG. 6) of the regions along the circumferential direction D1 adjacent to the second cylinder 42 on the outer peripheral surface 412A of the power supply accommodating portion 412. However, the scale 5 is provided in the second region B2 (see FIG. 6), which is a region other than the first region B1 among the regions along the circumferential direction D1 adjacent to the second cylinder 42 on the outer peripheral surface 412A. Absent.

As shown in FIG. 6, the scale 5 starts at the position where the black circle of "● OFF" is written (hereinafter, simply referred to as "OFF"), and is slightly separated from "OFF". Multiple scale lines are continuously written. The scale width of two adjacent scale lines on the scale 5 corresponds to 1 [%] of the dimming level. Numerical values (numerical values from "1" to "10") are written below the scale line for each dimming level of 10 [%] (before the scale line in FIG. 1). For example, the scale line marked with the numerical value "2" is a guide value corresponding to the dimming level of 20 [%]. As shown in FIG. 6, the scale 5 ends at the scale line marked with "10". In short, the scale 5 shows a guideline value starting from the “OFF” position and ranging from the lower limit of the dimming level of 5 [%] to the upper limit of the dimming level of 100 [%].

Here, the first region B1 and the second region B2 are the rotation direction C1 of the housing 4 with the axis L2 as the rotation axis when viewed from the direction along the central axis A1 (the front-rear direction in FIG. 1) (see FIG. 1). ) Are arranged so as to face each other. In short, the housing 4 of the luminaire 1 attached to the wiring duct 13 can be rotated with respect to the arm 11 so that the first region B1 faces substantially vertically downward. At this time, the second region B2 in which the scale 5 is not arranged faces the vertically upward direction (that is, the ceiling side). Therefore, when the first operator looks up at the lighting fixture 1 attached to the wiring duct 13, the scale 5 in the first region B1 can be easily visually recognized. In FIG. 6, the dotted lines indicating the first region B1 and the second region B2 are shown for the sake of clarity of explanation, and are not accompanied by an entity.

Further, as shown in FIGS. 4 and 7, the power supply accommodating portion 412 has a guide groove 413 extending along the circumferential direction D1 on the inner peripheral surface thereof. The guide groove 413 is formed in a region adjacent to the second tubular body 42 on the inner peripheral surface of the power supply accommodating portion 412. That is, the guide groove 413 is formed in a region on the back side of the first region B1 and the second region B2. The guide groove 413 is a groove for fitting the four claws 421 of the second tubular body 42, which will be described later.

(2.3.3) Second cylinder The second cylinder 42 has one surface (in FIG. 1) in the axial direction (front-back direction in FIG. 1) as shown in FIGS. 1, 2, 4 to 8. The front surface) is formed in an open flat cylindrical shape. The outer diameter of the second tubular body 42 is set to be substantially equal to the outer diameter of the first tubular body 41 as an example. Further, as an example, the second tubular body 42 is set so that its axial dimension is sufficiently smaller than the axial dimension of the first tubular body 41. The second tubular body 42 is formed of, for example, a PBT (Polybutylene terephthalate) resin. The second tubular body 42 is rotatably attached to the first tubular body 41 with the central axis A1 of the first tubular body 41 as a rotation axis.

As shown in FIGS. 2 and 6, the second tubular body 42 has an indicator line 420 on its outer peripheral surface 42A. The indicator line 420 is formed, for example, by providing an elongated groove and pouring paint into the groove.

As shown in FIG. 5, the second tubular body 42 has four claw portions 421 on the open one-sided peripheral edge. The four claw portions 421 are arranged at equal intervals along the circumferential direction of the second tubular body 42. The tip of each claw portion 421 projects in a direction away from the axis along the radial direction of the second tubular body 42. The four claws 421 are slidably fitted along the circumferential direction D1 with respect to the guide groove 413 of the power accommodating portion 412. That is, the dimension of the protruding tip of each claw portion 421 in the front-rear direction is set to be slightly smaller than the width dimension of the guide groove 413 in the front-rear direction. Further, the protruding tip of each claw portion 421 is curved in an arc shape so as to be parallel to the circumferential direction D1 when viewed from the axial direction of the second tubular body 42.

In this way, by fitting the four claws 421 into the guide groove 413 so as to be slidable, the second cylinder 42 can be smoothly rotated with respect to the first cylinder 41 with the central axis A1 as the rotation axis. It is possible to improve the operability of the second cylinder 42. Further, since the four claw portions 421 are provided at equal intervals, the rotation of the second tubular body 42 with respect to the first tubular body 41 is more stable than when the number of the claw portions 421 is, for example, one or two. Operation can be provided. Further, it is possible to further reduce the dropout of the second cylinder 42 with respect to the first cylinder 41.

As shown in FIG. 5, the second tubular body 42 further has a shaft fixing portion 422 at the central portion of the inner bottom surface thereof. The shaft fixing portion 422 is a member for receiving the shaft portion 62 of the dimming volume 6. The shaft fixing portion 422 protrudes in a tubular shape from the inner bottom surface, and has a hole at the tip thereof, which is recessed in a substantially D shape when viewed from the axial direction of the shaft fixing portion 422. The second tubular body 42 is fixed to the shaft portion 62 by fitting the D-shaped cut shaft portion 62 of the dimming volume 6 into the D-shaped hole of the shaft fixing portion 422. Therefore, as the second cylinder 42 rotates, the shaft portion 62 of the dimming volume 6 fitted in the shaft fixing portion 422 also rotates.

Further, the second tubular body 42 has a protrusion piece 424 on the inner bottom surface thereof on the outside of the reinforcing rib 423 that reinforces the shaft fixing portion 422. The protrusion 424 is formed in a substantially trapezoidal plate shape. The protrusion 424 projects in a direction approaching the first cylinder 41. When the second tubular body 42 undergoes a rotation operation, the protrusion 424 comes into contact with one of the pair of stoppers 66 of the regulation plate 63, thereby restricting further rotation of the second tubular body 42. In other words, the positional relationship between the protrusion 424 and the stopper 66 is defined so that the protrusion 424 comes into contact with one of the stoppers 66 when the indicator line 420 is in a position facing the "OFF" of the scale 5. .. Further, when the indicator line 420 is at a position facing the scale line on which the numerical value "10" of the scale 5 is marked, the positions of the protrusion piece 424 and the stopper 66 so that the protrusion piece 424 comes into contact with the other stopper 66. The relationship is defined.

Here, the second tubular body 42 has an operation hole 18 that connects the internal space of the housing 4 in which the correction volume 17 is housed and the external space of the housing 4. The operation hole 18 is provided on one surface 42B of the second cylinder 42 that intersects the axial direction of the first cylinder 41. In the present embodiment, the one surface 42B corresponds to the flat rear surface of the bottom of the second cylinder 42, and is substantially orthogonal to the axial direction of the first cylinder 41. The operation hole 18 penetrates the bottom portion of the second tubular body 42 in the thickness direction thereof.

The portion of the second cylinder 42 provided with the operation hole 18 is a portion facing the operation portion 170 when the rotation angle of the second cylinder 42 is equal to a predetermined rotation angle (rotation position). Therefore, the operation hole 18 faces the operation unit 170 of the correction volume 17 through the through hole 19 of the regulation plate 63 only when the second tubular body 42 is at a predetermined rotation angle. In the present embodiment, as an example, when the indicator line 420 is at a position facing "OFF" of the scale 5 (see FIG. 2), the second cylinder 42 is at a predetermined rotation angle. In other words, by turning the second cylinder 42 so that the indicator line 420 faces the “OFF” of the scale 5, the operation hole 18, the through hole 19, and the operation unit 170 are aligned with each other in the axial direction of the first cylinder 41. They are arranged in a row along the line. In short, when the indicator line 420 is in the "OFF" position of the scale 5, the second operator can perform the second operation through the operation hole 18.

When the indicator line 420 is at a position other than the “OFF” position of the scale 5, the second cylinder 42 has a rotation angle other than the predetermined rotation angle. Therefore, only the operation hole 18 is the through hole 19 and the operation unit 170. Will be out of the above line. In this case, even if the operation hole 18 is looked into, the internal space of the housing 4 is blocked by the regulation plate 63, so that the possibility that the tip of the tool is unintentionally inserted close to the volume substrate 60 can be reduced. it can.

When the second operation is not performed, the operation hole 18 is preferably closed with, for example, a sealing member 16 made of silicone rubber, as shown in FIGS. 6 and 7. In this case, it is possible to further reduce the possibility that the first worker who plans to perform the first work unintentionally operates the operation unit 170. In addition, it is possible to prevent foreign matter such as dust from entering the housing 4 through the operation hole 18.

By the way, the operation hole 18 is provided on one flat surface 42B of the second tubular body 42. Therefore, for example, as compared with the case where the operation hole 18 is provided on the outer peripheral surface 42A of the second tubular body 42, the possibility that the peripheral edge portion of the operation hole 18 is damaged can be reduced, and dust can be reduced. The seal member 16 for preventing the intrusion of foreign matter such as the like can be stably attached. Further, since a tool such as a screwdriver can be inserted into the operation hole 18 along the axial direction of the first cylinder 41, workability can be improved.

Regarding the assembly of the first cylinder 41 and the second cylinder 42, the D-shaped shaft portion 62 of the dimming volume 6 is aligned with the hole of the D-shaped shaft fixing portion 422, and the four claw portions 421 are respectively. It may be elastically deformed toward the central axis A1 and inserted into the first tubular body 41. The shaft portion 62 is inserted into the hole of the shaft fixing portion 422, and the four elastically deformed claw portions 421 are elastically restored when they reach the guide groove 413 and enter the guide groove 413. As a result, the second tubular body 42 is attached to the first tubular body 41.

(2.4) Optical Lens, Reflective Member, and Baffle The optical lens 8 is configured to control the light distribution of the light source 2 in the vicinity of the outlet 410. The optical lens 8 has translucency and is formed in a substantially disk shape as shown in FIG. Direct light from the light source 2 and reflected light from the reflecting member 9 are incident on the optical lens 8. The axial direction of the optical lens 8 is parallel to the optical axis L1. The optical lens 8 is formed of, for example, a transparent resin material such as acrylic resin or polycarbonate resin, or a transparent material such as glass. As shown in FIG. 1, the optical lens 8 is a Fresnel lens as an example. The optical lens 8 collects the light from the reflecting member 9 and efficiently emits it.

As shown in FIG. 1, the reflecting member 9 is configured to reflect the light emitted from the light source 2 toward the optical lens 8. The reflective member 9 is formed of a hard white resin material such as PBT resin. A metal film such as aluminum may be provided on the inner surface of the reflective member 9.

The reflective member 9 is formed in a substantially cylindrical shape with both ends open in the axial direction thereof. The axial direction of the reflective member 9 is parallel to the optical axis L1. The reflecting member 9 has a first end portion (rear end portion in FIG. 1) in which light emitted from the light source 2 is incident and a second end portion (front end portion in FIG. 1) in which light is emitted toward the optical lens 8. And have. The optical lens 8 is attached so as to cover the second end portion at the peripheral edge of the second end portion of the reflective member 9.

The reflective member 9 is formed so that the inner diameter gradually increases from the first end portion to the second end portion. In short, the inner diameter of the second end is larger than the inner diameter of the first end. Since the reflecting member 9 has the above-mentioned structure, the light emitted from the light source 2 is efficiently reflected toward the optical lens 8.

As shown in FIG. 1, the baffle 10 is formed in a substantially cylindrical shape with both ends open. The axial direction of the baffle 10 is parallel to the optical axis L1. The baffle 10 is made of, for example, a resin material such as polycarbonate or PBT. The inner surface of the baffle 10 (the surface on the optical axis L1 side) is formed as a black glare suppressing surface. The glare-suppressing surface is realized, for example, by painting the inner surface of the baffle 10 in black and applying a matte treatment. Alternatively, the glare-suppressing surface may be realized by applying a graining process to a surface painted in black or a surface made of a black member. As shown in FIG. 1, the baffle 10 of the present embodiment has a plurality of steps for further suppressing glare on the inner surface thereof.

(2.5) Lighting device As shown in FIG. 3, the lighting device 3 includes, for example, a rectifier circuit 30, a power conversion circuit 31, a control circuit 32, a constant current circuit 33, and a control unit 34. ing.

The rectifier circuit 30 is composed of a diode bridge. The AC power supply 7 is electrically connected to the AC input terminal of the rectifier circuit 30. The rectifier circuit 30 full-wave rectifies the AC voltage input to the AC input end, and outputs the rectified pulsating voltage (input voltage V1) from the pulsating output end.

The power conversion circuit 31 is, for example, a back boost converter also called a buck-boost chopper, which boosts or lowers the input voltage V1 output from between the pulsating output ends of the rectifier circuit 30 to a desired voltage (output voltage V2). It is configured to convert. The power conversion circuit 31 includes a switching element, an inductor, a diode, a smoothing capacitor, and the like.

The control circuit 32 is composed of, for example, a driver IC (Integrated Circuit) for a converter. The switching element of the power conversion circuit 31 is PWM (Pulse Width Modulation) controlled by the control circuit 32. Specifically, the control circuit 32 adjusts the duty ratio of the drive signal so as to match the target value, and outputs the drive signal to the switching element of the power conversion circuit 31. When the control circuit 32 receives an instruction signal for putting the control circuit 32 into the standby state from the control unit 34, the control circuit 32 does not drive the switching element (maintains in the off state) by setting the duty ratio of the drive signal to 0 [%]. ). If the switching element is not driven, the output voltage V2 of the power conversion circuit 31 decreases as the charge charge of the smoothing capacitor is discharged.

The constant current circuit 33 is configured to make the load current I1 supplied to the LED chip of the light source 2 constant. The constant current circuit 33 detects the magnitude of the load current I1 and is provided with a transistor (for example, an enhancement type) in the current path through which the load current I1 flows so that the magnitude of the load current I1 matches the target value. N-channel MOSFET) is driven.

The control unit 34 is composed of, for example, a microprocessor. The control unit 34 is configured to change the dimming level of the light source 2 according to the rotation angle (rotation position) of the second cylinder 42. The rotation angle is an angle based on the time when the indicator line 420 of the second cylinder 42 is in the “OFF” position. The control unit 34 has an input terminal for receiving a voltage signal corresponding to the resistance value of the dimming volume 6. Specifically, as shown in FIG. 3, a constant voltage Vcc is applied to both ends of a series circuit composed of a dimming volume 6 (variable resistor) and a correction volume 17 (variable resistor) for control. The unit 34 receives the voltage divided by the dimming volume 6 at the input terminal.

Further, the control unit 34 has a first output terminal for outputting a drive signal to the constant current circuit 33. The control unit 34 stores the dimming level corresponding to the resistance value of the dimming volume 6 as data in the memory. The control unit 34 generates a drive signal as a PWM signal whose duty ratio increases as the dimming level increases, and outputs the drive signal to the constant current circuit 33. Further, the control unit 34 has a second output terminal for outputting an instruction signal for setting the standby state to the control circuit 32.

If the dimming level corresponding to the voltage signal input to the input terminal is in the range of 100 [%] to the lower limit value (for example, 5 [%]), the control unit 34 has a duty ratio corresponding to the dimming level. The PWM signal (drive signal) having the above is output from the first output terminal. That is, the indicator line 420 of the second cylinder 42 is in the range between the scale line corresponding to 5 [%] and the scale line corresponding to 100 [%] on the scale 5 which is a guideline value of the dimming level. In this case, the drive signal is output from the first output terminal. The constant current circuit 33 makes the load current I1 match the target value by driving the transistor so as to reduce the difference between the detection voltage of the load current I1 and the drive signal (voltage corresponding to the duty ratio).

Further, when the control unit 34 adjusts the dimming level corresponding to the voltage signal input to the input terminal to 0 [%], that is, the indicator line 420 of the second cylinder 42 is adjusted to the “OFF” position of the scale 5. , The load current I1 is set to zero through the constant current circuit 33, and the light source 2 is turned off. Further, the control unit 34 outputs an instruction signal from the second output terminal to the control circuit 32 to put it in the standby state.

By the way, for example, due to deterioration of the dimming volume 6, the correspondence between the rotation angle of the second cylinder 42 and the dimming level of the light source 2 may be deviated. That is, at the time of manufacture, even if the light source 2 is turned off accurately by aligning the indicator line 420 of the second cylinder 42 with the “OFF” position of the scale 5, if the above deviation occurs, the scale 5 is “OFF”. The light source 2 may not be turned off even if it is adjusted to the position of. Similarly, even if the indicator line 420 is aligned with the scale line corresponding to, for example, the dimming level 50 [%], the light source 2 may be turned on at the dimming level 60 [%]. Therefore, the control unit 34 is configured to correct the correspondence between the rotation angle of the second cylinder 42 and the dimming level according to the adjustment position (rotation angle) of the operation unit 170 of the correction volume 17.

Specifically, the control unit 34 turns off the light source 2 with the same value as the divided voltage received at the input terminal when the resistance value of the dimming volume 6 is set to, for example, 10 [Ω] or less. It is stored in the memory as a threshold value for determining whether or not it is. However, due to deterioration of the dimming volume 6, the resistance value of the dimming volume 6 is set to 10 [Ω] or less even if the indicator line 420 of the second cylinder 42 is aligned with the “OFF” position of the scale 5. Instead, it may only drop to, for example, 100 [Ω]. In this case, since the value of the divided voltage corresponding to the resistance value of 100 [Ω] is higher than the above threshold value, the light source 2 is not turned off. Here, if the second operator operates the operation unit 170 to set the resistance value of the correction volume 17 high, even if the resistance value of the dimming volume 6 increases due to deterioration or the like, the control unit 34 inputs. The value of the voltage received at the terminal can be reduced to a value equivalent to 10 [Ω].

(2.6) Arm, Plug, and Wire As shown in FIG. 1, the arm 11 rotatably supports the first cylinder 41 with an axis L2 orthogonal to the axial direction of the first cylinder 41 as a rotation axis. The arm 11 is formed of, for example, aluminum die casting. The arm 11 has a pair of elongated plate-shaped support portions and a square tubular connecting portion 111 that connects one ends of the pair of support portions to each other. In other words, the arm 11 is formed in a substantially U shape as a whole. Here, the support portion of one of the pair of support portions (left side in FIG. 1) is referred to as "support portion 110A", and the support portion of the other (right side in FIG. 1) is referred to as "support portion 110B".

Each of the support portions 110A and 110B has a protrusion protruding in a direction approaching each other at its tip portion (lower end portion in FIG. 1). These protrusions are rotatably housed in the through holes 430 of the corresponding mounting portions 43. The connecting portion 111 and the supporting portion 110A have elongated conduction holes inside them for passing the electric wire 15 (see FIG. 1) connected to the plug 14. The electric wire 15 is drawn into the power supply accommodating portion 412 from the through hole 430 of the mounting portion 43 through the conduction holes of the connecting portion 111 and the support portion 110A, and is electrically connected to the AC input end of the rectifier circuit 30 of the lighting device 3. It is connected to the.

On the other hand, as shown in FIGS. 2 and 8, the support portion 110B has a knob screw 112 at its tip portion (lower end portion in FIG. 2). The knob screw 112 is a stepped screw, and the screw tip passes through the through hole 430 of the corresponding mounting portion 43 and is further screwed into the nut inside the power supply accommodating portion 412.

Since the arm 11 has the above-described configuration, by rotating the housing 4 with respect to the arm 11, for example, the angle of the irradiation direction (direction of the optical axis L1) of the light source 2 with respect to the vertical direction can be set. It can be changed arbitrarily.

By the way, FIG. 8 shows a plan view of the state of the luminaire 1 during transportation or storage. That is, the entire lighting fixture 1 is made compact by rotating the housing 4 with respect to the arm 11 so that the central axis A1 of the first cylinder 41 is along the longitudinal direction of the support portions 110A and 110B of the arm 11. Can be done. In other words, the outer diameters of the first cylinder 41 and the second cylinder 42 are set smaller than the distance between the support portions 110A and 110B in the left-right direction so that the luminaire 1 can be transformed into such a state. There is. Further, the dimensions of the support portions 110A and 110B in the longitudinal direction and the dimensions from the shaft L2 to the second tubular body 42 are set so that the second tubular body 42 does not come into contact with the connecting portion 111.

As shown in FIG. 1, the plug 14 is attached to the center of the upper end surface of the connecting portion 111 of the arm 11 in the left-right direction. The plug 14 has a pair of terminals 140 exposed to the outside at the upper end thereof. By attaching the plug 14 to the wiring duct 13, the terminal 140 is electrically connected to the AC power supply 7, and the lighting device 3 is electrically connected to the AC power supply 7 via the plug 14 and the electric wire 15. Ru.

The fall prevention wire 12 has, for example, a crimp terminal at one end thereof. The wire 12 is screwed to the connecting portion 111 of the arm 11 via a crimp terminal. Further, the other end of the wire 12 is looped so that the hook of the fastener is hooked. The wire 12 is fixed to the wiring duct 13 via a fastener.

(2.7) First Work The first work, that is, the work of adjusting the dimming state of the light source 2, will be briefly described with reference to FIG. In the following description, the housing 4 of the lighting fixture 1 attached to the wiring duct 13 is rotated with respect to the arm 11 in advance, that is, the axial direction of the housing 4 is inclined with respect to the vertical direction. It is assumed that there is. At this time, it is assumed that the first region B1 provided with the scale 5 faces substantially vertically downward, and the second region B2 not provided with the scale 5 faces substantially vertically upward.

First, the first operator looks up at the luminaire 1 from below and confirms the indicator line 420 of the second cylinder 42 at the “OFF” position. That is, the light source 2 of the luminaire 1 is in a state of being turned off in the example of FIG. As shown in FIG. 2, the first operator puts the pad of the index finger on the outer peripheral surface 42A of the second cylinder 42, for example, and the second cylinder 42 rotates clockwise with respect to the first cylinder 41. Move your finger down to do so. When the indicator line 420 reaches the first scale line indicating a guideline value of 5 [%], which is the lower limit of the dimming level, the light source 2 starts light irradiation. When the second cylinder 42 is further rotated by the pad of the finger from there, the brightness of the light source 2 gradually increases.

For example, when the dimming level of the luminaire 1 is set to 50 [%], the first operator may align the indicator line 420 with the scale line marked with the numerical value "5". Further, when the dimming level of the lighting fixture 1 is set to 100 [%] (all lighting), the indicator line 420 may be aligned with the scale line marked with the numerical value "10". However, when the indicator line 420 reaches the scale line marked with the numerical value "10", the protrusion 424 of the second cylinder body 42 comes into contact with the stopper 66, so that the second cylinder body 42 rotates clockwise any more. It is regulated so that it cannot be done.

As described above, since the first operator can operate the second tubular body 42 with one finger (touching the pad of the finger), the first operation can be easily performed.

(2.8) Second work The second work, that is, the work for turning the operation unit 170 of the correction volume 17 to eliminate the deviation caused in the above correspondence, is simple with reference to FIGS. 9A and 9B. Explain to.

9A and 9B show a state in which the housing 4 is viewed from the rear along the axial direction thereof. In FIG. 9A, since the second tubular body 42 is at a rotation angle other than the predetermined rotation angle, only the operation hole 18 is located at a position away from the through hole 19 and the operation unit 170. Although not shown in FIG. 9A, at this time, the indicator line 420 of the second tubular body 42 is located at a position facing the scale line marked with the numerical value “1”, for example. In the present embodiment, if the indicator line 420 is at a position other than "OFF", the operation hole 18 is at a position away from the through hole 19 and the operation unit 170.

From the state of FIG. 9A, the second operator puts the pad of the index finger on the outer peripheral surface 42A of the second cylinder 42 and rotates the second cylinder 42 counterclockwise with respect to the first cylinder 41 ( (See arrow in FIG. 9A). When the indicator line 420 reaches the “OFF” position, as shown in FIG. 9B, the operation holes 18 are lined up in a line along the axial direction of the through hole 19, the operation unit 170, and the first cylinder 41. 170 is exposed.

Here, if there is a deviation in the above correspondence, even if the indicator line 420 reaches the “OFF” position, the light source 2 has a brightness of, for example, about 5 [%] at a dimming level. It keeps lighting. The second operator may insert the tip of a tool such as a screwdriver through the operation hole 18 and rotate the operation unit 170 clockwise so that the resistance value of the correction volume 17 becomes high. At this time, the second operator keeps turning the operation unit 170 until the light source 2 is turned off. When the light source 2 is turned off, the correction work is completed, and the operation hole 18 may be closed with the seal member 16.

In the present embodiment, the positional relationship between the operation hole 18, the through hole 19, and the operation unit 170 is defined so that the operation hole 18, the through hole 19, and the operation unit 170 are arranged in a row when the instruction line 420 is in the “OFF” position. Therefore, the second operator may simply turn the correction volume 17 while visually recognizing that the light source 2 is switched from the lit state to the extinguished state without using an illuminometer or the like. Therefore, the second worker can easily perform the second work.

As described above, in the luminaire 1 of the present embodiment, the second cylinder 42 is rotated so that the second cylinder 42 has a predetermined rotation angle, and the tip of a tool such as a screwdriver is inserted through the operation hole 18. By turning the operation unit 170 of the correction volume 17, the correspondence can be corrected. As a result, even if there is a deviation in the corresponding relationship, the deviation can be eliminated. Further, it is possible to reduce the possibility that the first worker mistakenly operates the operation unit 170 when the first work is scheduled to be performed. Therefore, the luminaire 1 can improve workability when performing the first work (adjust the dimming level) and suppress a decrease in the adjustment accuracy of the dimming level. Further, the design (appearance) of the lighting fixture 1 as a whole is improved as compared with the case where the operation unit 170 or the knob (for turning the operation unit 170) is provided so as to project from the outer peripheral surface 4A of the housing 4. Can also be planned.

(3) Modification Example The modification will be described below with reference to FIGS. 10A to 10C. Hereinafter, the above-described embodiment will be referred to as a “basic example”. Further, the same components as those in the basic example are designated by the same reference numerals as those in the basic example, and the description of those components will be omitted as appropriate.

10A and 10B show a plan view of a main part of the housing 4 as viewed from above. Further, FIG. 10C shows a side view of the main part of the housing 4 as viewed from the right. However, in FIG. 10C, for convenience of explanation, the volume substrate 60, the dimming volume 6 and the correction volume 17A housed in the housing 4 are illustrated by imaginary lines (dotted lines).

In the basic example, the operation hole 18 is provided on one surface 42B of the second tubular body 42. On the other hand, this modification is different from the basic example in that the operation hole 18A is provided on the outer peripheral surface 42A of the second cylinder 42 as shown in FIGS. 10A and 10B. The operation hole 18A is formed so as to be recessed at the edge of the outer peripheral surface 42A in a direction away from the first tubular body 41. The operation hole 18A has a substantially rectangular shape when viewed from the radial direction of the second tubular body 42.

Further, as shown in FIGS. 10A and 10B, the first cylinder 41 of this modification is located at the edge of the second end facing the second cylinder 42, at a portion facing the operation unit 170A of the correction volume 17A. It has an auxiliary hole 20. The relative positional relationship between the operation unit 170A and the auxiliary hole 20 is unchanged. The auxiliary hole 20 is formed so as to be recessed in a direction away from the second tubular body 42 and to connect the internal space and the external space of the housing 4. The auxiliary hole 20 has a substantially rectangular shape when viewed from the radial direction of the first tubular body 41. The size of the auxiliary hole 20 in the circumferential direction D1 is set to be substantially the same as the size of the operation hole 18A in the circumferential direction D1.

The correction volume 17A has an operation unit 170A with a cross hole. The correction volume 17A is a so-called vertical type variable resistor unlike the basic example. That is, the operation unit 170 of the correction volume 17 of the basic example is provided on a surface parallel to the mounting surface of the volume board 60, but the operation unit 170A is provided on a surface perpendicular to the mounting surface of the volume board 60. (See FIG. 10C). The operation unit 170A is arranged so as to face the auxiliary hole 20 in the radial direction of the first cylinder 41.

In FIG. 10A, the indicator line 420 of the second tubular body 42 is located at a position facing the scale line marked with the numerical value “1”. At this time, as in the basic example, the second tubular body 42 is at a rotation angle other than the predetermined rotation angle. Further, at this time, the operation hole 18A is not aligned with the auxiliary hole 20 along the axial direction of the first tubular body 41, but is located at a position shifted in the circumferential direction D1.

In this modification, as shown in FIG. 10B, the operation hole 18A and the auxiliary hole 20 along the axial direction of the first cylinder 41 when the rotation angle of the second cylinder 42 is equal to a predetermined rotation angle. Connect. In other words, if the second operator rotates the second cylinder 42 so that the auxiliary hole 20 and the operation hole 18A are aligned along the axial direction with the target of the position of the auxiliary hole 20 (see the arrow in FIG. 10A). ), The second operation can be performed through the operation hole 18A. Therefore, the second operator can easily perform the second operation without having to align the operation unit 170A in the housing 4 so as to be directly visible through the operation hole 18A.

Also in this modified example, as in the basic example, when the indicator line 420 is in the “OFF” position, the second tubular body 42 has a predetermined rotation angle. The second operator turns the second cylinder body 42 so that the instruction line 420 faces the “OFF” of the scale 5, so that the operation hole 18A and the auxiliary hole 20 are aligned with the axial direction of the first cylinder body 41. It can be arranged so that it can be connected. Therefore, workability can be further improved. Further, as in the basic example, the second operator may simply turn the correction volume 17A while visually recognizing that the light source 2 is switched from the lit state to the extinguished state without using an illuminometer or the like. Therefore, the second worker can easily perform the second work.

By the way, it is preferable that these dimensional relationships are defined so that the respective dimensions of the operation hole 18A and the auxiliary hole 20 are smaller than the diameter of the tip of a tool such as a screwdriver. However, these dimensional relationships are defined so that the size of one hole 21 (see FIG. 10B) formed by connecting the operation hole 18A and the auxiliary hole 20 is slightly larger than the above diameter. Is preferable. In this case, it is possible to reduce the situation where the tip of the tool is inserted into the operation hole 18A or the auxiliary hole 20 even though the second tubular body 42 is at a rotation angle other than the predetermined rotation angle.

(4) Other Modifications Below, some transformations other than the transformations described in the above column "(3) Modifications" are listed. Some of the modifications described below can also be applied in combination with the above-mentioned basic examples or modifications as appropriate.

In the basic example, when the indicator line 420 is in the "OFF" position, the second cylinder 42 has a predetermined rotation angle, and the operation holes 18, the through holes 19, and the operation unit 170 are lined up in a row along the axial direction. As described above, these positional relationships are specified, but this is not the case. For example, the second cylinder 42 is predetermined at any position from the scale line indicating the dimming level of 5 [%] of the scale 5 to the scale line indicating the dimming level of 100 [%]. The positional relationship may be specified so as to be the rotation angle. However, in this case, it is desirable that the second worker perform the second work using an illuminometer or the like.

In the basic example, the scale 5 is provided on the outer peripheral surface 4A of the housing 4, but the scale 5 is not an essential component of the luminaire 1 and may not be provided. In this case, as described in the above column "(2.8) Second work", if the second work is performed at the rotation position of the second cylinder 42 in which the light source 2 originally switches from the lit state to the extinguished state. Good.

In the basic example, the dimming volume 6 and the correction volume 17 are connected in series, but the present invention is not limited to this, and the dimming volume 6 and the correction volume 17 may be connected in parallel. In this case, a fixed resistor is connected in series to the parallel circuit composed of the dimming volume 6 and the correction volume 17, and the control unit 34 is divided at the input terminal corresponding to the combined resistance value of the parallel circuit. Receive the voltage. Even if the resistance value of the dimming volume 6 rises due to deterioration or the like and the combined resistance value rises, if the second operator operates the operation unit 170 to set the resistance value of the correction volume 17 low, the control unit 34 can lower the value of the voltage received at the input terminal.

In the basic example, the outer diameter of the second cylinder 42 is set to be equal to the outer diameter of the first cylinder 41, but this is not the case. For example, the outer diameter of the second cylinder 42 may be set larger than the outer diameter of the first cylinder 41. In this case, considering the state of the luminaire 1 during transportation or storage as shown in FIG. 8, the outer diameter of the second cylinder 42 is larger than the distance between the support portions 110A and 110B of the arm 11 in the left-right direction. Is also preferably set small. Further, for example, the outer diameter of the second tubular body 42 may be set smaller than the outer diameter of the first tubular body 41. In this case, if the outer diameter of the second cylinder 42 becomes extremely small, the distance between the scale 5 and the indicator line 420 in the radial direction becomes large, and the workability when adjusting the dimming level is lowered. Therefore, for example, it is preferably larger than the diameter of the optical lens 8. However, considering both workability and design (appearance) of the housing 4, the outer diameter of the second cylinder 42 is set to be equal to the outer diameter of the first cylinder 41 as in the basic example. Is desirable.

(5) Advantages As described above, the luminaire 1 according to the first aspect has a light source 2, a control unit 34 that controls dimming of the light source 2, a correction volume (17, 17A), and a cylindrical shape. It includes a housing 4. The housing 4 houses the light source 2, the control unit 34, and the correction volume (17, 17A). The housing 4 has a cylindrical first cylinder 41 and a cylindrical second cylinder 42. The first tubular body 41 has an exit port 410 that emits light emitted from the light source 2 at the first end in the axial direction thereof. The second cylinder 42 is rotatably attached to the first cylinder 41 at the second end opposite to the first end of the first cylinder 41, with the central axis A1 of the first cylinder 41 as the rotation axis. .. The control unit 34 changes the dimming level of the light source 2 according to the rotation angle of the second cylinder 42, and further, the control unit 34 changes the dimming level of the light source 2 according to the adjustment position of the operation unit (170, 170A) of the correction volume (17, 17A). The correspondence between the rotation angle of the two cylinders 42 and the dimming level is corrected. The second tubular body 42 has an operation hole (18, 18A) that connects the internal space of the housing 4 in which the correction volume (17, 17A) is housed and the external space of the housing 4. The portion of the second cylinder 42 provided with the operation hole (18, 18A) is a portion facing the operation portion (170, 170A) when the rotation angle of the second cylinder 42 is equal to a predetermined rotation angle. is there.

According to the first aspect, it is possible to improve workability when performing the first work (adjust the dimming level) and suppress a decrease in the adjustment accuracy of the dimming level. In addition, the design (appearance) of the lighting fixture 1 as a whole can be improved.

Regarding the luminaire 1 according to the second aspect, in the first aspect, it is preferable that the operation hole 18 is provided on one surface 42B of the second tubular body 42 intersecting the axial direction. According to the second aspect, the possibility that the peripheral edge portion of the operation hole 18 is damaged is reduced as compared with the case where the operation hole 18 is provided on the outer peripheral surface 42A of the second tubular body 42, for example. Can be done.

In the second aspect, the luminaire 1 according to the third aspect is arranged between the correction volume 17 and the second tubular body 42 in the internal space, and regulates the rotation range of the second tubular body 42. It is preferable to further include a plate 63. The regulation plate 63 preferably has a through hole 19 penetrating in the thickness direction of the regulation plate 63 in a region facing the operation unit 170. The operation hole 18 preferably faces the through hole 19 and the operation unit 170 when the rotation angle of the second cylinder 42 is equal to the predetermined rotation angle.

According to the third aspect, since the rotation range of the second cylinder 42 can be regulated, the rotation of the dimming volume 6 to near the limit of the rotatable range of the dimming volume 6 is suppressed, for example. To. Therefore, the through hole 19 and the operation unit 170 can be inserted into the tip of a tool such as a screwdriver to rotate the operation unit 170 while reducing the deterioration of the dimming volume 6.

Regarding the luminaire 1 according to the fourth aspect, in the first aspect, the operation hole 18A is preferably provided on the outer peripheral surface 42A of the second tubular body 42. According to the fourth aspect, the operation hole 18A can be easily visually recognized by the second operator as compared with the case where the operation hole 18A is provided on one surface 42B of the second cylinder body 42, for example.

Regarding the luminaire 1 according to the fifth aspect, in the fourth aspect, it is preferable that the first tubular body 41 has an auxiliary hole 20 at a portion facing the operation unit 170A at the edge of the second end. It is preferable that the auxiliary hole 20 is recessed in a direction away from the second tubular body 42 and is formed so as to connect the internal space and the external space. The operation hole 18A is preferably recessed at the edge of the outer peripheral surface 42A in a direction away from the first tubular body 41. The operation hole 18A is preferably connected to the auxiliary hole 20 along the axial direction when the rotation angle of the second tubular body 42 is equal to the predetermined rotation angle.

According to the fifth aspect, when the second worker performs the second work, the second cylinder so that the auxiliary hole 20 and the operation hole 18A are lined up along the axial direction with the position of the auxiliary hole 20 as a target. The body 42 can be rotated. Therefore, workability can be improved.

Regarding the lighting fixture 1 according to the sixth aspect, in any one of the first to fifth aspects, the outer peripheral surface 4A of the housing 4 has a scale 5 as a guideline value for the dimming level. It is preferable that the outer peripheral surface 4A of 4 is provided along the circumferential direction D1. According to the sixth aspect, the workability of the first work and the second work can be improved.

Regarding the luminaire 1 according to the seventh aspect, in any one of the first to sixth aspects, the outer diameter of the second tubular body 42 is equal to or equal to the outer diameter of the first tubular body 41. It is preferably larger than the outer diameter of one cylinder 41. According to the seventh aspect, the operability of the second tubular body 42 can be improved. In particular, when the outer diameter of the second cylinder 42 is equal to the outer diameter of the first cylinder 41, the first cylinder 41 and the second cylinder 42 can be provided as the housing 4 having a sense of unity, and the lighting can be provided. It is also possible to improve the design (appearance) of the appliance 1 as a whole.

In any one of the first to sixth aspects, the luminaire 1 according to the eighth aspect further includes an optical lens 8 that is attached to the outlet 410 and controls the light distribution of the light source 2. Is preferable. The outer diameter of the second tubular body 42 is preferably smaller than the outer diameter of the first tubular body 41 and larger than the diameter of the optical lens 8. According to the eighth aspect, the light distribution can be controlled through the optical lens 8, and the operability of the second cylinder 42 can be improved.

1 Lighting equipment 2 Light source 34 Control unit 4 Housing 4A Outer surface 41 1st cylinder 410 Exit 42 2nd cylinder 42A Outer surface 42B One surface 5 Scale 63 Regulation plate 8 Optical lens 17,17A Correction volume 170, 170A Operation Parts 18, 18A Operation hole 19 Through hole 20 Auxiliary hole A1 Central axis D1 Circumferential direction

Claims (8)

Light source and
A control unit that controls dimming of the light source and
Correction volume and
The light source, the control unit, and a cylindrical housing for accommodating the correction volume are provided.
The housing has a cylindrical first cylinder and a cylindrical second cylinder.
The first cylinder has an outlet for emitting light emitted from the light source at the first end in the axial direction thereof.
The second cylinder is rotatably attached to the first cylinder at a second end of the first cylinder opposite to the first end, with the central axis of the first cylinder as a rotation axis. ,
The control unit changes the dimming level of the light source according to the rotation angle of the second cylinder, and further, the rotation angle of the second cylinder and the control unit according to the adjustment position of the operation unit of the correction volume. Correct the correspondence with the dimming level,
The second cylinder has an operation hole that connects the internal space of the housing in which the correction volume is housed and the external space of the housing.
A lighting fixture characterized in that the portion of the second cylinder provided with the operation hole is a portion facing the operation portion when the rotation angle of the second cylinder is equal to a predetermined rotation angle. .. The luminaire according to claim 1, wherein the operation hole is provided on one surface of the second cylinder body that intersects the axial direction. Further provided with a regulation plate arranged between the correction volume and the second cylinder in the internal space to regulate the rotation range of the second cylinder.
The regulation plate has a through hole penetrating in the thickness direction of the regulation plate in a region facing the operation portion.
The luminaire according to claim 2, wherein the operation hole faces the through hole and the operation unit when the rotation angle of the second cylinder is equal to the predetermined rotation angle. The luminaire according to claim 1, wherein the operation hole is provided on an outer peripheral surface of the second cylinder. The first tubular body has an auxiliary hole at a portion facing the operating portion at the edge of the second end.
The auxiliary hole is formed so as to be recessed in a direction away from the second cylinder and to connect the internal space and the external space.
The operation hole is recessed at the edge of the outer peripheral surface in a direction away from the first cylinder.
The luminaire according to claim 4, wherein the operation hole is connected to the auxiliary hole along the axial direction when the rotation angle of the second cylinder is equal to the predetermined rotation angle. Any of claims 1 to 5, wherein a scale serving as a reference value for the dimming level is provided on the outer peripheral surface of the housing along the circumferential direction of the outer peripheral surface of the housing. The lighting equipment according to item 1. The invention according to any one of claims 1 to 6, wherein the outer diameter of the second cylinder is equal to the outer diameter of the first cylinder or larger than the outer diameter of the first cylinder. Lighting equipment. An optical lens attached to the outlet to control the light distribution of the light source is further provided.
The invention according to any one of claims 1 to 6, wherein the outer diameter of the second cylinder is smaller than the outer diameter of the first cylinder and larger than the diameter of the optical lens. lighting equipment.

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