JP2017162681A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which includes a lamp part and an arm part and inhibits occurrence of a situation where the lamp part is not maintained at a desired angle relative to the arm part.SOLUTION: A lighting device 1 includes: a holding base part 90; an arm part 70 having a first end part 73 and a second end part 74, having an attachment shaft 78a protruding in a direction that intersects with a longitudinal direction at the first end part 73, and held by the holding base part 90 at the second end part 74; a light source part 30 having a light emitting element; a lamp part 5 having an opening 120, in which the light source part 30 is disposed, and a bearing part 242a in which the attachment shaft 78a is disposed; a pressing tool 80 which presses the attachment shaft 78a toward the bearing part 242a; and a wear resistant member 25a disposed between the attachment shaft 78a and the bearing part 242a or the pressing tool 80.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a lighting fixture including a lamp part and an arm part.

  A conventional lighting fixture, for example, a lighting fixture for a spotlight, includes a power supply box having a power circuit therein, an arm portion having one end portion attached to the power supply box, an other end portion of the arm portion, and an internal portion. And a lamp part having a light source (for example, Patent Document 1).

  In the luminaire disclosed in Patent Document 1, the angle between the connecting portion between the lamp portion and the arm portion and the connecting portion between the power supply box and the arm portion can be freely adjusted, and the irradiation direction of the light from the lamp portion can be changed. It can be changed freely.

  The end of the arm part on the lamp part side has a cylindrical mounting shaft that protrudes in opposite directions, and has a T-shape. On the other hand, the lamp part is formed with a bearing part into which the mounting shaft is fitted. The bearing portion has a cylindrical recess. The attachment shaft of the arm portion is fitted into the bearing portion. And it attaches so that a C-shaped leaf | plate spring may cover from an attachment shaft. The mounting shaft is pressed against the bearing portion by the elastic force of the leaf spring. The leaf spring is provided with a screw for adjusting the elastic force of the leaf spring. The tightening degree of the screw is adjusted by a contractor or the like when the lighting apparatus is installed. Thereby, the torque required to adjust the angle of the lamp part with respect to the arm part is adjusted. As described above, in the lighting fixture disclosed in Patent Document 1, the mounting shaft rotates with respect to the bearing portion so that the angle of the lamp unit with respect to the arm unit can be adjusted and the configuration capable of maintaining the angle can be realized. It is said.

JP 2014-146503 A

  However, in the lighting fixture disclosed in Patent Document 1, by repeatedly adjusting the angle of the lamp portion with respect to the arm portion, the contact portion between the attachment shaft and the bearing portion and the contact portion between the attachment shaft and the leaf spring are worn. Occurs. When the diameter of the mounting shaft is reduced due to wear, for example, the elastic force for pressing the mounting shaft by the leaf spring is reduced as compared with the time of construction. Therefore, the frictional force between the mounting shaft, the bearing portion and the leaf spring is reduced. When the frictional force decreases, the lamp unit may hang from the arm part due to gravity (so-called “neck drooping” state), that is, the lamp unit cannot be maintained at a desired angle with respect to the arm part.

  Therefore, the present invention provides a lighting fixture that includes a lamp portion and an arm portion, and can suppress the occurrence of a state in which the lamp portion cannot be maintained at a desired angle with respect to the arm portion.

  In order to solve the above-described problem, an aspect of the lighting apparatus according to the present invention includes a holding base, a first end, and a second end, and a direction intersecting the longitudinal direction at the first end. The second end portion has an arm portion held by the holding base portion, a light source portion having a light emitting element, and an opening portion, and the light source portion is in the opening portion. A lamp part having a bearing part in which the mounting shaft is disposed, a pressing tool that presses the mounting shaft toward the bearing part, and the mounting shaft and the bearing part or the pressing tool. A wear-resistant member.

  ADVANTAGE OF THE INVENTION According to this invention, it is a lighting fixture provided with a lamp part and an arm part, Comprising: The lighting fixture which can suppress generation | occurrence | production of the state which becomes impossible to maintain a lamp part at a desired angle with respect to an arm part can be provided.

FIG. 1 is a perspective view illustrating an appearance of a lighting apparatus according to an embodiment. FIG. 2 is a perspective sectional view of a part of the lighting apparatus according to the embodiment. FIG. 3 is an exploded perspective view of the main body, arm portion, and presser of the lighting apparatus according to the embodiment. FIG. 4 is a perspective view showing the external appearance of the main body, arm portion, and presser of the lighting apparatus according to the embodiment. FIG. 5 is a cross-sectional view showing a configuration in the vicinity of the mounting shaft of the lighting fixture according to the embodiment. FIG. 6 is a cross-sectional view illustrating a configuration in the vicinity of an attachment shaft of a lighting fixture according to a comparative example. FIG. 7 is a perspective view showing an appearance of the wear-resistant member according to Modification 1 of the embodiment. FIG. 8: is a perspective view which shows the structure of the attachment shaft vicinity of a lighting fixture provided with the abrasion-resistant member which concerns on the modification 1 of embodiment. FIG. 9 is a perspective view showing an appearance of the wear-resistant member according to Modification 2 of the embodiment. FIG. 10: is a perspective view which shows the structure of the attachment shaft vicinity of a lighting fixture provided with the abrasion-resistant member which concerns on the modification 2 of embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangement positions, connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment)
[1. overall structure]
First, the structure of the lighting fixture which concerns on embodiment is demonstrated using drawing.

  FIG. 1 is a perspective view showing an appearance of a lighting fixture 1 according to the present embodiment.

  FIG. 2 is a perspective sectional view of the lamp unit 5 and the arm unit 70 of the lighting fixture 1 according to the present embodiment. FIG. 2 shows a perspective sectional view of the luminaire 1 in a cross section passing through the optical axis J of the luminaire and parallel to the yz plane.

  FIG. 3 is an exploded perspective view of the main body 20, the arm portion 70, and the presser 80 of the lighting fixture 1 according to the present embodiment.

  FIG. 4 is a perspective view showing the appearance of the main body 20, the arm portion 70, and the presser 80 of the lighting fixture 1 according to the present embodiment. FIGS. 3 and 4 show the state in which the arm portion 70 is inclined in the optical axis J direction.

  In each figure, the direction parallel to the optical axis J of the luminaire 1 is the z-axis direction, and two directions perpendicular to the optical axis J and perpendicular to each other are the x-axis direction and the y-axis direction. In the present embodiment, the y-axis direction is the vertical direction. In the present embodiment, the positive side in the z-axis direction is the front, and the negative side in the z-axis direction is the rear.

  As shown in FIG. 1, the luminaire 1 is a spotlight, and includes an arm part 70, a lamp part 5, and a holding base part 90. In addition, as illustrated in FIG. 2, the lighting fixture 1 further includes a light source unit 30 and a presser 80. Moreover, as FIG.3 and FIG.4 shows, the lighting fixture 1 is further provided with the abrasion-resistant members 25a and 25b.

  As shown in FIG. 2, the lamp unit 5 has an opening 120, and the light source unit 30 is disposed in the opening 120. As shown in FIG. 2, the lamp unit 5 includes a shade 10, a main body 20, a reflecting member 40, an optical member 50, and a light control member 60. As shown in FIG. 3, the main body 20 of the lamp unit 5 includes bearings 242a and 242b on which the mounting shafts 78a and 78b of the arm unit 70 are respectively arranged.

  Hereinafter, each component of the lighting fixture 1 is demonstrated.

[1-1. Arm]
The arm portion 70 has a first end portion 73 and a second end portion 74, and the first end portion 73 has mounting shafts 78 a and 78 b protruding in a direction intersecting the longitudinal direction, and the second end portion 74. The member is held by the holding base 90. In the present embodiment, as shown in FIG. 3, the arm portion 70 has an arm portion main body 72 in addition to the first end portion 73 and the second end portion 74. In the present embodiment, the arm portion 70 includes columnar mounting shafts 78 a and 78 b extending at a first end portion 73 in a direction substantially perpendicular to the optical axis J and the longitudinal direction of the arm portion 70. The arm portion 70 is rotatably attached to the main body 20 by the attachment shafts 78a and 78b of the arm portion 70 being sandwiched between the presser 80 and the bearing portions 242a and 242b of the main body 20, respectively.

  The second end portion 74 of the arm portion 70 is held by the holding base 90 so as to be rotatable about the longitudinal direction of the arm portion 70 as a rotation axis. Note that the axis of rotation is not limited to the longitudinal direction of the arm portion 70.

  As shown in FIG. 2, an insertion hole 76 is formed in the arm portion 70 in the longitudinal direction of the arm portion 70. A lead wire 92 is inserted into the insertion hole 76, and power is supplied from the holding base 90 to the light source unit 30 through the lead wire 92. In this way, since the lead wire 92 is not exposed to the outside, damage to the lead wire 92 is suppressed. Moreover, since the lead wire 92 cannot be seen from the exterior of the lighting fixture 1, it is preferable also in terms of design.

  Although the raw material which forms the arm part 70 is not specifically limited, For example, it forms with metal materials, such as an aluminum alloy. In the present embodiment, the arm portion 70 is formed, for example, through an aluminum die casting process.

[1-2. SEED]
The seed 10 is a cylindrical member in which the light source unit 30 is disposed and emits light from the light source unit 30 to the outside. As shown in FIG. 2, the shade 10 includes a side opening 130. The side opening 130 is a slit-like opening provided on the side surface of the shade 10, and the arm portion 70 is disposed on the side opening 130.

  As shown in FIG. 2, in addition to the light source unit 30, the main body 20, the reflecting member 40, the optical member 50, the light control member 60, and the like are disposed inside the shade 10.

  Although the raw material which forms the shade 10 is not specifically limited, For example, it forms with metal materials, such as an aluminum alloy. In the present embodiment, shade 10 is formed through an aluminum die casting process using an aluminum alloy.

[1-3. Body]
As shown in FIG. 2, the main body 20 is a member that is disposed inside the shade 10 and to which the light source unit 30 and the arm unit 70 are attached. The main body 20 also functions as a heat sink that dissipates heat generated from the light source unit 30.

  As shown in FIG. 2, the main body 20 includes a mounting portion 210, an insertion hole 212, and a flange portion 230 on the front side (z-axis direction positive side). The attachment part 210 is a part to which the light source part 30 is attached. The attachment part 210 includes a flat surface for attaching the light source part 30. Thereby, the heat generated from the light source unit 30 is efficiently conducted to the main body 20. The lead wire 92 for supplying power to the light source unit 30 is inserted into the insertion hole 212. The inner diameter of the insertion hole 212 is substantially the same as the outer diameter of the lead wire 92. Thereby, it is suppressed that light leaks from the insertion hole 212 to the back of the main body 20 (z-axis direction negative side).

  The collar portion 230 is a portion for attaching the main body 20 to the shade 10. As shown in FIG. 3, the flange portion 230 is provided with a recess 232. The main body 20 is attached to the shade 10 by screwing a screw (not shown) into a screw hole (not shown) provided on the inner surface of the shade 10 through the recess 232.

  As shown in FIG. 3, the main body 20 includes a heat radiating portion 240 on the rear side. The heat radiating unit 240 is a part for radiating heat generated from the light source unit 30. The heat radiation part 240 includes bearing parts 242a and 242b, base parts 256a and 256b, and screw holes 252, 254a and 254b. The bearing portions 242a and 242b are portions that support the attachment shafts 78a and 78b of the arm portion 70, respectively. In the present embodiment, the shape of the cross section of the bearing portions 242a and 242b is a semi-cylindrical shape and corresponds to the shape of the mounting shafts 78a and 78b of the arm portion 70.

  As shown in FIG. 2, the main body 20 includes an insertion path 246. The insertion passage 246 is a portion that penetrates the main body 20 and through which the lead wire 92 is inserted. In the present embodiment, the insertion path 246 is a through hole formed in a direction (y-axis direction in the drawing) substantially perpendicular to the optical axis J of the light source unit 30 when viewed from the bearings 242a and 242b. The insertion path 246 extends from the bearing portions 242a and 242b in a direction substantially perpendicular to the optical axis J, and the inner diameter of the insertion path 246 is gradually enlarged in the optical axis J direction on the negative side of the main body 20 in the y-axis direction. Yes. The opening 244 on the arm portion 70 side of the insertion path 246 is disposed at a position facing the first end portion 73 of the arm portion 70.

  Although the raw material which forms the main body 20 is not specifically limited, For example, it forms with metal materials, such as an aluminum alloy. In the present embodiment, the main body 20 is formed through an aluminum die casting process using an aluminum alloy.

[1-4. Light source section]
The light source unit 30 includes a light emitting element, and is a light source unit that emits light that is emitted from the lighting fixture 1. In the present embodiment, the light source unit 30 is a light emitting module having LEDs (Light Emitting Diodes) as light emitting elements, and is an LED light source that emits predetermined light radially. The light source unit 30 is configured to emit white light, for example. The light source unit 30 is configured by a COB (Chip On Board) type LED, and a base, a plurality of LEDs that are bare chips (LED chips) mounted on the base, and the LEDs are sealed to form a phosphor. Including a sealing member.

  The light source unit 30 is attached to the attachment unit 210 of the main body 20. In the lighting fixture 1 shown in each figure, the optical axis J of the light source part 30 is the z-axis direction of each figure.

  The base constituting the light source unit 30 is a mounting substrate for mounting a plurality of LEDs, and is, for example, a ceramic substrate, a resin substrate, or a metal base substrate coated with insulation. In addition, the base has a plate shape having a rectangular plane in a plan view, for example, and the bottom surface (z-axis direction negative side) of the base is attached to and fixed to the attachment portion 210 of the main body 20. Although not shown, the base is formed with a pair of electrode terminals (a positive electrode terminal and a negative electrode terminal) for receiving DC power for causing the LED to emit light from the outside.

[1-5. Reflective member]
The reflection member 40 is a member that controls light distribution from the light source unit 30. In the present embodiment, the reflecting member 40 reflects the light from the light source unit 30 toward the optical member 50. The reflecting member 40 has a cylindrical shape in which an opening through which the optical axis J passes is formed.

  As shown in FIG. 2, the inner diameter of the reflecting member 40 extends from the end on the side where light from the light source unit 30 is incident (the negative side in the z-axis direction) to the end on the side where the light is emitted. It is configured to gradually increase. Light from the light source unit 30 is reflected on the inner surface of the reflecting member 40.

  The reflecting member 40 can be formed using a hard white resin material such as polybutylene terephthalate (PBT). A metal film such as aluminum may be provided on the inner surface of the reflecting member 40.

[1-6. Optical member]
The optical member 50 is a translucent member including a light incident surface on which light from the reflecting member 40 is incident and a light emitting surface from which light incident on the light incident surface is emitted. The optical member 50 may have a function of controlling the light distribution of the light incident from the reflecting member 40 and emitting it. In the present embodiment, the optical member 50 is a Fresnel lens. Thereby, the lighting fixture 1 can condense emitted light and can form a spot-shaped illumination area.

  The optical member 50 is formed using a translucent material. For example, the optical member 50 can be formed using a transparent resin material such as acrylic or polycarbonate (PC), or a transparent material such as a glass material.

[1-7. Light control member]
As shown in FIG. 2, the light control member 60 is a cylindrical member arranged inside the shade 10 and on the light emitting surface side of the optical member 50.

  The light control member 60 is disposed around the optical axis J. Further, as shown in FIG. 2, the outer diameter of the light control member 60 is substantially equal to the inner diameter of the shade 10 on the opening 120 side. Thereby, it can suppress that the emitted light passage area | region of the opening part 120 of the shade 10 is reduced by the light control member 60. FIG. Moreover, the leakage of the emitted light from between the shade 10 and the light control member 60 can be suppressed.

  The light control member 60 covers a portion of the inner surface of the shade 10 from the vicinity of the light emission surface of the optical member 50 to the vicinity of the z-axis direction positive end of the shade 10. Here, the inner surface (the surface on the optical axis J side) of the light control member 60 is a black glare suppressing surface. In this manner, the vicinity of the positive end portion in the z-axis direction of the opening 120 of the shade 10 is covered with the inner surface of the light control member 60 that is a black glare suppressing surface. Thereby, the glare in the vicinity of the opening positive side end portion of the shade 10 is suppressed.

  The inner surface of the light control member 60 is not particularly limited as long as it is a black glare suppressing surface. The black glare-suppressing surface can be realized, for example, by applying a matte treatment to the surface painted black. Further, the black glare-suppressing surface can be realized by applying a texturing process to a surface coated with black or a surface made of a black member. Further, in order to further suppress glare on the inner surface of the light control member 60, a step portion may be provided on the inner surface of the light control member 60.

  The light control member 60 can be formed using, for example, a resin material such as PBT or PC.

[1-8. Presser]
The presser 80 is a member that presses the attachment shafts 78a and 78b of the arm portion 70 toward the bearing portions 242a and 242b of the main body 20, respectively. In this embodiment, the presser 80 is an elastic member for rotatably attaching the attachment shafts 78a and 78b to the bearing portions 242a and 242b, respectively. The presser 80 is a leaf spring having a substantially C-shaped shape as shown in FIG. 3, with the bearings 242 a and 242 b and the mounting shafts 78 a and 78 b of the arm 70 sandwiched between the screws 86 a, It is fixed to the main body 20 by 86b and 88. Thereby, the arm part 70 is attached to the main body 20. More specifically, the screws 86a, 86b, and 88 are screwed into the screw holes 254a, 254b, and 252 of the main body 20 through the through holes 84a, 84b, and 82 of the presser 80, respectively. A spring washer may be disposed between the screw 88 and the presser 80. Thereby, loosening of the screw 88 is suppressed.

  Since the attachment shafts 78a and 78b of the arm portion 70 are sandwiched between the presser 80 and the main body 20, the arm portion 70 is rotatable with respect to the main body 20 about the attachment shafts 78a and 78b.

  Further, as described above, when the presser 80 is an elastic member and is fixed to the lamp unit 5 with screws 86a, 86b, and 88, the torque required to rotate the lamp unit 5 with respect to the arm unit 70 is Adjustment is possible by adjusting the screwing amount of the screw 88. In the present embodiment, as will be described later, the phenomenon that the lamp unit 5 cannot be maintained at a desired angle with respect to the arm unit 70 is suppressed, so that the screw 88 can be appropriately adjusted during construction. The need to re-adjust the screwing amount of the screw 88 after construction is reduced. Therefore, the screw 88 may not be disposed at a position that can be adjusted by the driver from the side opening 130 of the shade 10 in a state in which the lighting fixture 1 is assembled. Thereby, the freedom degree in the shape of the side opening part 130 of the shade 10, etc. improves.

  The material forming the presser 80 is not particularly limited. In the present embodiment, the presser 80 is made of stainless steel.

[1-9. Wear resistant member]
The wear resistant members 25a and 25b are disposed between the mounting shafts 78a and 78b and the bearing portions 242a and 242b or the presser 80, and the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and the presser 80. It is a member that suppresses at least one wear of the member. In the present embodiment, the wear-resistant members 25a and 25b are sheet-like members having a cylindrical shape. In this configuration, the wear-resistant members 25a and 25b having a desired thickness can be easily manufactured. That is, it is easy to manage the thickness of the wear resistant members 25a and 25b.

  The inner diameters of the wear resistant members 25a and 25b are substantially equal to the outer diameters of the mounting shafts 78a and 78b, respectively, and the wear resistant members 25a and 25b are mounted on the outer circumferences of the mounting shafts 78a and 78b. That is, the mounting shafts 78a and 78b are inserted into the wear-resistant members 25a and 25b, respectively. As shown in FIG. 4, the mounting shafts 78 a and 78 b are disposed on the bearing portions 242 a and 242 b with the wear-resistant members 25 a and 25 b mounted, respectively, and are directed toward the bearing portions 242 a and 242 b by the presser 80. Pressed. That is, the mounting shafts 78a and 78b are sandwiched between the bearing portions 242a and 242b and the presser 80 in a state where the wear-resistant members 25a and 25b are mounted, respectively.

  As a result, wear of at least one of the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and the presser member 80 is suppressed. Therefore, since the lowering of the elastic force that holds the mounting shafts 78a and 78b by the presser 80 is suppressed, the lowering of the frictional force between the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and the presser 80 can be suppressed.

  The material forming the wear-resistant members 25a and 25b is not particularly limited as long as it can suppress at least one of the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and the pressing member 80. As a material forming the wear-resistant members 25a and 25b, for example, a material having a small friction coefficient between the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and at least one of the pressing member 80 can be used. . When the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and the presser 80 are all formed of a metal material, for example, a crystalline resin such as nylon is used as a material for forming the wear-resistant members 25a and 25b. be able to. Accordingly, it is possible to reliably suppress wear of at least one of the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and the presser member 80.

[1-10. Holding stand]
The holding base 90 is a member that holds the arm 70. In the present embodiment, the holding base 90 holds the arm 70 rotatably. In the present embodiment, the holding table 90 includes a power supply unit (not shown) that supplies power to the light source unit 30. Thereby, the lamp part 5 and the arm part 70, and the power supply part can be integrated. The power supply unit built in the holding table 90 converts AC power supplied from the outside of the holding table 90 into DC power, and supplies the DC power to the light source unit 30 via the lead wire 92.

  The outer wall portion of the holding table 90 is formed from a metal material, a resin material, or the like. In the present embodiment, for example, the outer wall portion is made of aluminum.

[2. Wear suppression configuration]
Next, a configuration for suppressing wear of the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and the presser 80 in the lighting fixture 1 according to the present embodiment will be described in detail with reference to the drawings.

  FIG. 5 is a cross-sectional view showing a configuration in the vicinity of the attachment shaft 78a of the lighting fixture 1 according to the present embodiment. In FIG. 5, a part of the VV cross section shown in FIG. 4 is shown.

  As shown in FIG. 5, in the lighting fixture 1 according to the present embodiment, the wear-resistant member 25a is disposed between the mounting shaft 78a, the presser 80, and the bearing portion 242a. Thereby, it is suppressed that the attachment shaft 78a and the presser 80 or the bearing part 242a contact | connect directly. In addition, wear caused by rubbing between the mounting shaft 78a and the wear-resistant member 25a is sufficiently smaller than wear caused by rubbing between the mounting shaft 78a and the bearing portion 242a, for example. Similarly, the wear caused by the friction between the bearing portion 242a and the presser 80 and the wear-resistant member 25a is sufficiently small. For this reason, in the lighting fixture 1, wear of the mounting shaft 78 a, the presser 80, and the bearing portion 242 a due to repeated angle adjustment with respect to the arm portion 70 of the lamp portion 5 can be suppressed. Although the mounting shaft 78a and the bearing portion 242a have been described above, the same applies to the mounting shaft 78b and the bearing portion 242b.

  Here, in order to explain the effect of the lighting fixture 1 according to the present embodiment, a lighting fixture according to a comparative example will be described with reference to the drawings. The lighting fixture according to the comparative example is different from the lighting fixture 1 in that the wear-resistant members 25a and 25b are not provided, and is the same as the lighting fixture 1 in other points.

  FIG. 6 is a cross-sectional view illustrating a configuration in the vicinity of the attachment shaft 78a of the lighting fixture 102 according to the comparative example. In FIG. 6, a part of the cross section similar to FIG. 5 in the lighting fixture 102 is shown.

  As shown in FIG. 6, in the lighting fixture 102 according to the comparative example, the mounting shaft 78a, the bearing portion 242a, and the presser 80 are in direct contact. For this reason, by repeatedly adjusting the angle of the lamp part 5 with respect to the arm part 70, at least one of the mounting shaft 78a, the bearing part 242a, and the presser 80 is worn. Due to the wear, for example, the diameter of the mounting shaft 78a is reduced, so that the elastic force for pressing the mounting shaft 78a by the presser 80 is lower than that during construction. Therefore, the frictional force between the mounting shaft 78a, the bearing portion 242a and the presser 80 is reduced. When the frictional force decreases, the lamp unit may hang down from the arm part due to gravity, that is, the lamp unit cannot be maintained at a desired angle with respect to the arm part.

  In addition, when the mounting shaft 78a and the bearing portion 242a are formed of the same material (aluminum alloy) as in the lighting fixture 1 according to the present embodiment (that is, in the case of a combination of so-called “togane”), Due to the action of atomic forces, the wear caused by the friction between them is particularly great. Therefore, as in the lighting fixture 1 according to the present embodiment, the wear suppression effect exhibited by arranging the wear-resistant member 25a is particularly remarkable.

  In the present embodiment, the presser 80 is made of a material different from the attachment shafts 78a and 78b. Specifically, the retainer 80 is made of stainless steel, and the attachment shafts 78a and 78b are made of an aluminum alloy. In this case, since it is not a combination of the above “togane”, even when the presser 80 and the mounting shafts 78a and 78b rub against each other, wear can be relatively suppressed.

[3. Summary]
As described above, the lighting fixture 1 according to the present embodiment has the holding base 90, the first end 73, and the second end 74, and the first end 73 intersects the longitudinal direction. Mounting arms 78a and 78b projecting from each other, and at the second end 74, an arm portion 70 held by the holding base 90 is provided. The luminaire 1 includes a light source unit 30 having a light emitting element, an opening 120, the light source unit 30 is disposed in the opening 120, and bearings 242a and 242b in which mounting shafts 78a and 78b are respectively disposed. A lamp unit 5 is further provided. The luminaire 1 includes a presser 80 that holds the mounting shafts 78a and 78b toward the bearings 242a and 242b, and a resistance member disposed between the mounting shafts 78a and 78b and the bearings 242a and 242b, or the presser 80. Wear members 25a and 25b are further provided.

  Thereby, it is suppressed that the attachment shafts 78a and 78b and the presser 80 contact | connect directly. Further, it is possible to prevent the attachment shafts 78a and 78b and the bearing portions 242a and 242b from directly contacting each other. Further, the wear caused by the friction between the mounting shafts 78a and 78b and the wear-resistant members 25a and 25b is sufficiently smaller than the wear caused by the friction between the mounting shafts 78a and 78b and the bearing portions 242a and 242b, for example. Similarly, the wear caused by the friction between the bearing portions 242a and 242b and the presser 80 and the wear-resistant members 25a and 25b is sufficiently small. For this reason, in the lighting fixture 1, it is possible to suppress wear of the attachment shafts 78a and 78b, the presser 80, and the bearing portions 242a and 242b, which are caused by repeatedly adjusting the angle of the lamp portion 5 with respect to the arm portion 70. Therefore, the phenomenon that the lamp unit 5 cannot be maintained at a desired angle with respect to the arm unit 70 can be suppressed. For this reason, the necessity for adjusting the screw 88 for adjusting with the torque for rotating the lamp part 5 with respect to the arm part 70 after construction is reduced. Therefore, the screw 88 may not be configured to be adjustable from the outside of the lighting fixture 1. Thereby, the freedom degree in the shape etc. of the side opening part 130 of the shade 10 of the lighting fixture 1 improves.

  Moreover, in the lighting fixture 1 which concerns on this Embodiment, the attachment shafts 78a and 78b and the bearing parts 242a and 242b may be formed with the same raw material.

  In this case, since the mounting shafts 78a and 78b and the bearing portions 242a and 242b are each a combination of so-called “togane”, the wear suppression effect caused by the wear-resistant members 25a and 25b is particularly remarkable.

  Moreover, in the lighting fixture 1 which concerns on this Embodiment, the wear-resistant members 25a and 25b may be sheet-like members.

  In this configuration, the wear-resistant members 25a and 25b having a desired thickness can be easily manufactured. That is, it is easy to manage the thickness of the wear resistant members 25a and 25b.

  Moreover, in the lighting fixture 1 which concerns on this Embodiment, the abrasion-resistant members 25a and 25b may be crystalline resin.

  Accordingly, it is possible to reliably suppress wear of at least one of the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and the presser member 80.

  Moreover, in the lighting fixture 1 which concerns on this Embodiment, the holding tool 80 may be a different material from the attachment shafts 78a and 78b.

  In this case, since the presser 80 and the attachment shafts 78a and 78b are not a so-called “togane” combination, wear can be relatively suppressed even when the presser 80 and the attachment shafts 78a and 78b rub against each other.

  Further, in the lighting fixture 1 according to the present embodiment, the presser 80 is an elastic member, and may be fixed to the lamp unit 5 with screws 88.

  Thereby, the torque required to rotate the lamp unit 5 with respect to the arm unit 70 can be adjusted by adjusting the screwing amount of the screw 88.

  Moreover, in the lighting fixture 1 which concerns on this Embodiment, you may further provide the power supply part 60 which supplies electric power to the light source part 50 in the holding stand part 90. FIG.

  Thereby, the lamp part 5 and the arm part 70, and the power supply part can be integrated.

(Variations, etc.)
As mentioned above, although the lighting fixture 1 which concerns on this invention was demonstrated based on embodiment, this invention is not limited to these embodiment.

  For example, the shape of the wear resistant member is not limited to a cylindrical shape. Hereinafter, modified examples of the shape of the wear-resistant member will be described with reference to the drawings.

  First, a wear-resistant member according to a first modification of the embodiment and a lighting fixture including the same will be described.

  FIG. 7 is a perspective view showing the appearance of the wear-resistant member 25c according to this modification.

  FIG. 8 is a perspective view illustrating a configuration in the vicinity of the attachment shaft 78a of the lighting fixture 1a including the wear-resistant member 25c according to the present modification. In addition, in FIG. 8, in order to show arrangement | positioning of the abrasion-resistant member 25c intelligibly, the external appearance of the lighting fixture 1a of the state which removed the shade 10 and the presser 80 is shown. The lighting fixture 1a according to the present modification is different from the lighting fixture 1 in that it includes the wear-resistant members 25c instead of the wear-resistant members 25a and 25b of the lighting fixture 1 according to the embodiment, and is identical in other points. To do.

  As shown in FIG. 7, the wear-resistant member 25 c according to this modification includes a semi-cylindrical semi-cylindrical portion 125 and a flat plate-like plate portion 126 disposed at the end of the semi-cylindrical portion 125. As shown in FIG. 8, the wear-resistant member 25c according to the present modification is disposed between the mounting shaft 78a and the bearing portion 242a, and is not disposed between the mounting shaft 78a and the presser 80. Even in such a configuration, it is possible to suppress wear of the mounting shaft 78a and the bearing portion 242a due to repeated angle adjustment with respect to the arm portion 70 of the lamp portion 5 in the lighting fixture 1a. Therefore, the phenomenon that the lamp unit 5 cannot be maintained at a desired angle with respect to the arm unit 70 can be suppressed.

  In this modification, the flat plate portion 126 of the wear-resistant member 25c is sandwiched between the base portion 256a and the presser 80 (not shown in FIG. 8). Thereby, when adjusting the angle of the lamp part 5 with respect to the arm part 70, it can suppress that the position of the abrasion-resistant member 25c moves. Therefore, wear of the mounting shaft 78a and the bearing portion 242a can be reliably suppressed by the wear resistant member 25c.

  Although the mounting shaft 78a and the bearing portion 242a have been described above, the same applies to the mounting shaft 78b and the bearing portion 242b.

  Then, the wear-resistant member which concerns on the modification 2 of embodiment, and a lighting fixture provided with the same are demonstrated.

  FIG. 9 is a perspective view showing the appearance of the wear-resistant member 25d according to this modification.

  FIG. 10 is a perspective view showing a configuration in the vicinity of the attachment shaft 78a of the lighting fixture 1b including the wear-resistant member 25d according to this modification. In addition, in FIG. 10, the external appearance of the lighting fixture 1b of the state which removed the shade 10 and the presser 80 was shown like FIG. The lighting fixture 1b according to the present modification is different from the lighting fixture 1 in that it is provided with a wear-resistant member 25d instead of the wear-resistant members 25a and 25b of the lighting fixture 1 according to the embodiment, and is identical in other points. To do.

  As shown in FIG. 9, the wear-resistant member 25 d according to the present modification includes a C-shaped portion 127 having a substantially C-shaped cross section, and a flat plate-shaped plate portion 128 disposed at the center of the C-shaped portion 127. Is provided. Further, a through hole 129 for inserting the screw 86a is formed in the flat plate portion 128. As shown in FIG. 10, the wear-resistant member 25d according to this modification is provided between the mounting shaft 78a and the bearing portion 242a, and between the mounting shaft 78a and the presser 80 (not shown in FIG. 10). Be placed. With such a configuration, it is possible to suppress wear of the mounting shaft 78a, the bearing portion 242a, and the presser 80 that accompany repeated adjustment of the angle of the lamp unit 5 with respect to the arm unit 70 in the lighting fixture 1b. Therefore, the phenomenon that the lamp unit 5 cannot be maintained at a desired angle with respect to the arm unit 70 can be suppressed.

  In the present modification, the flat plate portion 128 of the wear-resistant member 25c is sandwiched between the table-like portion 256a and the presser 80. Further, the screw 86a is fixed in a state of being penetrated through the through hole 129 of the wear resistant member 25d. Thereby, when adjusting the angle of the lamp part 5 with respect to the arm part 70, it can suppress reliably that the position of the wear-resistant member 25d moves. Therefore, wear of the mounting shaft 78a, the bearing portion 242a, and the presser 80 can be reliably suppressed by the wear resistant member 25d.

  Although the mounting shaft 78a and the bearing portion 242a have been described above, the same applies to the mounting shaft 78b and the bearing portion 242b.

  In the above description, the wear-resistant member has been described as having a sheet-like shape. However, the wear-resistant member covers at least one surface of the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and the presser 80. It may be covered.

  In this configuration, for example, the wear-resistant member can be easily formed by applying a wear-resistant resin or the like.

  Moreover, in the said embodiment and each modification, although the attachment shafts 78a and 78b and the bearing parts 242a and 242b were formed with the aluminum alloy, the example which forms the presser 80 with stainless steel was shown, but they are formed. The material is not particularly limited. The material forming the wear-resistant members 25a and 25b can be appropriately selected according to the material forming each of the mounting shafts 78a and 78b, the bearing portions 242a and 242b, and the presser 80.

  Moreover, in the said embodiment and each modification, although the pressing tool 80 was fixed with the screws 86a, 86b, and 88, the pressing tool 80 may be fixed with members other than a screw. With the use of the wear-resistant member, the need for readjustment of the presser 80 after construction (that is, tightening of the screw 88) is reduced. For example, the presser 80 is made of a member other than a screw such as a rivet. It may be fixed.

  Moreover, in the said embodiment, although the optical member 50 was a Fresnel lens, the optical member 50 is not limited to this. The optical member 50 may be, for example, a hybrid lens or a dome type lens.

  Moreover, in the said embodiment, although COB type LED was used in the light source part 30, you may use another light emitting element. For example, an SMD (Surface Mount Device) type LED may be used. Moreover, you may use other solid light emitting elements, such as an organic EL (Electro Luminescence) element, or other light sources other than a solid light emitting element.

  In addition, the present invention can be realized by various combinations conceived by those skilled in the art for each embodiment, or by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present invention. This form is also included in the present invention.

DESCRIPTION OF SYMBOLS 1, 1a, 1b Lighting fixture 5 Lamp part 25a, 25b, 25c, 25d Wear-resistant member 30 Light source part 70 Arm part 73 First end part 74 Second end part 78a, 78b Mounting shaft 80 Presser 86a, 86b, 88 Screw 90 Holder 120 Opening 242a, 242b Bearing

Claims (8)

A holding base,
The first end portion has a mounting shaft that protrudes in a direction intersecting the longitudinal direction at the first end portion, and is held by the holding base portion at the second end portion. Arms,
A light source unit having a light emitting element;
A lamp part having an opening, the light source part being arranged in the opening, and a bearing part in which the mounting shaft is arranged;
A presser for pressing the mounting shaft toward the bearing,
A wear-resistant member disposed between the mounting shaft and the bearing portion or the presser. The lighting fixture according to claim 1, wherein the mounting shaft and the bearing portion are formed of the same material. The lighting apparatus according to claim 1, wherein the wear-resistant member is a sheet-like member. The lighting apparatus according to any one of claims 1 to 3, wherein the wear-resistant member covers at least one surface of the mounting shaft, the bearing portion, and the presser. The lighting apparatus according to claim 1, wherein the wear-resistant member is a crystalline resin. The lighting fixture according to any one of claims 1 to 5, wherein the presser is made of a material different from the attachment shaft. The lighting fixture according to claim 1, wherein the presser is an elastic member, and is fixed to the lamp unit with a screw. The lighting fixture according to claim 1, further comprising a power supply unit that supplies power to the light source unit in the holding table unit.

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