本発明の一実施形態に係る照明器具１１について、図１から図８を用いて説明する。本実施形態に係る照明器具１１は、ＬＥＤ素子４２を光源とする照明器具である。照明器具１１は、例えば天井面等の被取付部Ｃに直接取り付けられる直付け型のシーリングライトとして使用することが可能である。なお、照明器具１１は、天井面に限らず、壁面（傾斜面も含む）に取り付けてブラケットライトとして使用することも可能である。以下の説明では、照明器具１１の光を照射する側を照明器具１１の照射面側とし、照明器具１１における被取付部Ｃに対向する側を照明器具１１の取付面側（照射面側の反対側）として説明する。また、照明器具１１の取付面側とは、照明器具１１の背面側（裏面側）である。また、図２等に示す照明器具１１が被取付部Ｃに取付けられた状態において、被取付部Ｃに直交する方向を照明器具１１の上下方向とした場合、照明器具１１の取付面側を上方とし、照明器具１１の照射面側の直下方向を下方として説明する。照明器具１１の上下方向に対して直交する方向を照明器具１１の側方として説明する。また、以下の説明において、下方から照明器具１１等を視た状態を平面視とする。上下方向に対して直交方向から照明器具１１等を視た状態を側面視とする。照明器具１１等の断面形状を視た状態を断面視とする。
A lighting fixture 11 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG. A lighting fixture 11 according to the present embodiment is a lighting fixture that uses an LED element 42 as a light source. The luminaire 11 can be used as a direct-mounted ceiling light that is directly attached to a mounting portion C such as a ceiling surface. It should be noted that the lighting device 11 is not limited to the ceiling surface, and can be attached to a wall surface (including an inclined surface) and used as a bracket light. In the following description, the side of the lighting fixture 11 that irradiates light is the irradiation surface side of the lighting fixture 11, and the side of the lighting fixture 11 facing the attached portion C is the mounting surface side of the lighting fixture 11 (opposite to the irradiation surface side). side). Further, the mounting surface side of the lighting fixture 11 is the rear side (rear side) of the lighting fixture 11 . 2, etc., when the lighting device 11 is attached to the mounting portion C, and the vertical direction of the lighting device 11 is the direction orthogonal to the mounting portion C, the mounting surface side of the lighting device 11 is positioned upward. , and the direction directly below the irradiation surface side of the lighting device 11 is defined as the downward direction. A direction perpendicular to the up-down direction of the lighting fixture 11 will be described as a side of the lighting fixture 11 . Also, in the following description, a state in which the lighting fixture 11 and the like are viewed from below is referred to as a plan view. A side view is a state in which the lighting fixture 11 and the like are viewed from a direction perpendicular to the vertical direction. A state in which the cross-sectional shape of the lighting equipment 11 and the like is viewed is referred to as a cross-sectional view.
照明器具１１は、器具本体２１、電源部３１、光源部（ＬＥＤモジュール）４１、導光部材５１、第１反射部材である反射部材６１、第２反射部材である環状反射部材７１、光源セット部８１、取付部材９１、端子台１００を主に備える。照明器具１１の外形は、平面視において略円形状であって、照明器具１１の高さ方向（図２の照明器具１１の上下方向）の寸法が、照明器具１１の径方向（図２の照明器具１１の上下方向に対して直交方向）の寸法よりも小さく薄型で扁平な略円柱形状である。
なお、照明器具１１の外形形状は、本実施形態に限定されるものではない。照明器具１１の外形形状は、平面視において略円形状以外に、例えば、楕円形状、正方形状、長方形状、多角形状や扇形、またはそれらを組み合わせた形状にすることもできる。
The lighting fixture 11 includes a fixture main body 21, a power supply section 31, a light source section (LED module) 41, a light guide member 51, a first reflecting member 61, a second reflecting member 71, and a light source setting section. 81 , a mounting member 91 and a terminal block 100 . The outer shape of the lighting fixture 11 is substantially circular in plan view, and the dimension in the height direction of the lighting fixture 11 (vertical direction of the lighting fixture 11 in FIG. 2) is equal to the radial direction of the lighting fixture 11 (the lighting fixture in FIG. 2). It has a substantially cylindrical shape that is thinner and flatter than the dimension in the direction perpendicular to the up-down direction of the instrument 11 .
In addition, the external shape of the lighting fixture 11 is not limited to this embodiment. The outer shape of the lighting device 11 can be, for example, an elliptical shape, a square shape, a rectangular shape, a polygonal shape, a fan shape, or a combination thereof, in addition to a substantially circular shape in plan view.
器具本体２１は、電源部３１、光源部（ＬＥＤモジュール）４１、導光部材５１、反射部材６１、環状反射部材７１、光源セット部８１、端子台１００を保持するともに取付部材９１に取り付けられる部材である。器具本体２１は、導光部材５１を露出するための開口を下側に有するとともに上端が開放された略円筒状部材である。器具本体２１には、電源部３１、光源部４１、導光部材５１、反射部材６１、環状反射部材７１、光源セット部８１、端子台１００が収容される。器具本体２１は、円筒部２２と、円筒部２２の下端部から径方向内側に延出される円環状の内縁部２３と、を有している。器具本体２１は、熱伝導率の高い、例えば金属素材で構成される。本実施形態では一例として器具本体２１をアルミニウム合金で構成し、電源部３１および光源部４１から生ずる熱を放熱することができる。器具本体２１は、その最大内径寸法が取付部材９１の外径寸法よりも大きく、取付部材９１の照射面側に取り付け可能である。器具本体２１は、円筒部２２の内周面に側面視四角形状で凸状の複数（本実施形態では３つ）の位置決め部２２ａと、各位置決め部２２ａに対応して円筒部２２の上端部に設けられる側面視略長方形状で凸状の複数（本実施形態では３つ）の係止部２２ｂと、各位置決め部２２ａに対応して円筒部２２の下端部に設けられる側面視略長方形状で凸状の複数（本実施形態では３つ）の下端凸部２２ｃと、を有している。位置決め部２２ａ、係止部２２ｂ及び下端凸部２２ｃは、円筒部２２の内周面において周方向に沿って略等間隔で形成されている。位置決め部２２ａの上端部は、取付部材９１に器具本体２１を取り付ける際に、取付部材９１の被係止部９４（案内部９４ｂ）の下端部の位置を規制するものである。位置決め部２２ａの下端部は、器具本体２１に光源セット部８１を取り付ける際に、光源セット部８１（光源部４１）の上端部の位置を規制するものである。これにより、光源セット部８１（光源部４１）を器具本体２１の底部の所定の位置に保持することができる。
The fixture main body 21 is a member that holds the power source section 31, the light source section (LED module) 41, the light guide member 51, the reflecting member 61, the annular reflecting member 71, the light source set section 81, and the terminal block 100, and is attached to the mounting member 91. is. The device main body 21 is a substantially cylindrical member having an opening on the lower side for exposing the light guide member 51 and an open upper end. The fixture main body 21 accommodates the power source section 31 , the light source section 41 , the light guide member 51 , the reflecting member 61 , the annular reflecting member 71 , the light source set section 81 , and the terminal block 100 . The instrument body 21 has a cylindrical portion 22 and an annular inner edge portion 23 extending radially inward from the lower end portion of the cylindrical portion 22 . The instrument main body 21 is made of, for example, a metal material with high thermal conductivity. In this embodiment, as an example, the instrument body 21 is made of an aluminum alloy so that the heat generated from the power supply section 31 and the light source section 41 can be dissipated. The instrument main body 21 has a maximum inner diameter larger than the outer diameter of the attachment member 91 and can be attached to the irradiation surface side of the attachment member 91 . The instrument main body 21 includes a plurality of (three in this embodiment) positioning portions 22a having a rectangular shape in a side view and a convex shape on the inner peripheral surface of the cylindrical portion 22, and an upper end portion of the cylindrical portion 22 corresponding to each positioning portion 22a. A plurality of (three in this embodiment) locking portions 22b which are substantially rectangular in side view and convex and are provided at the lower end portion of the cylindrical portion 22 corresponding to each positioning portion 22a. and a plurality of (three in this embodiment) lower end protrusions 22c. The positioning portion 22a, the locking portion 22b, and the lower end convex portion 22c are formed on the inner peripheral surface of the cylindrical portion 22 at substantially equal intervals along the circumferential direction. The upper end portion of the positioning portion 22 a regulates the position of the lower end portion of the engaged portion 94 (guide portion 94 b ) of the mounting member 91 when the instrument body 21 is mounted on the mounting member 91 . The lower end portion of the positioning portion 22 a regulates the position of the upper end portion of the light source set portion 81 (light source portion 41 ) when the light source set portion 81 is attached to the fixture main body 21 . Thereby, the light source set portion 81 (light source portion 41 ) can be held at a predetermined position on the bottom portion of the instrument body 21 .
器具本体２１の内縁部２３は、導光部材５１の照射面側の外周縁部と対向する。内縁部２３は、平面視においてＬＥＤ素子４２の径方向内側の縁部と重なる反射部２３ａを有している。反射部２３ａは、器具本体２１に環状反射部材７１を組付けた際に、環状反射部材７１の内周縁よりも径方向内側に延出される部分である。具体的には、反射部２３ａは、取付面側に反射面を有し、ＬＥＤ素子４２から出射して導光部材５１を透過した光を反射する部分である。また、反射部２３ａは、ＬＥＤ素子４２の少なくとも一部と重なるように配置されることで、ＬＥＤ素子４２が発する光の直接光を遮るため、ユーザーの目に直接ＬＥＤ素子４２が発する光が達することを抑えることできる。これにより、照明光のムラを抑えるとともに、グレアを軽減した照明光を得ることができる。反射部２３ａは、導光部材５１を器具本体２１内に配置された環状反射部材７１に組み付けた際に、導光部材５１の照射面側の外周縁部に当接または近接する部分である。
なお、本実施形態では、反射部２３ａは、内縁部２３と一体的な部材として構成しているが、例えば、反射部を別部材として構成し、内縁部に連設してもよい。
また、反射部２３ａには、例えば必要に応じて、周方向に沿って溝部を設けて、この溝部に沿って円環状のパッキンを配置してもよい。パッキンは、器具本体２１（反射部２３ａ）と導光部材５１の隙間を覆うためのものであり、水滴や埃等が照明器具１１の内部への侵入することを防ぐ、いわゆる気密パッキンとして作用する。
The inner edge portion 23 of the device main body 21 faces the outer peripheral edge portion of the light guide member 51 on the irradiation surface side. The inner edge portion 23 has a reflecting portion 23a that overlaps the radially inner edge portion of the LED element 42 in plan view. The reflecting portion 23 a is a portion that extends radially inward from the inner peripheral edge of the annular reflecting member 71 when the annular reflecting member 71 is assembled to the appliance main body 21 . Specifically, the reflecting portion 23 a has a reflecting surface on the mounting surface side, and is a portion that reflects the light emitted from the LED element 42 and transmitted through the light guide member 51 . In addition, since the reflecting part 23a is arranged so as to overlap at least a part of the LED element 42, the direct light emitted by the LED element 42 is blocked, so that the light emitted by the LED element 42 directly reaches the user's eyes. can be suppressed. As a result, it is possible to obtain illumination light with reduced glare while suppressing unevenness of the illumination light. The reflecting portion 23a is a portion that comes into contact with or is close to the outer peripheral edge of the light guide member 51 on the irradiation surface side when the light guide member 51 is assembled with the annular reflecting member 71 arranged inside the device main body 21 .
In the present embodiment, the reflecting portion 23a is configured as a member integrated with the inner edge portion 23, but the reflecting portion may be configured as a separate member and connected to the inner edge portion, for example.
In addition, if necessary, a groove may be provided in the circumferential direction of the reflecting portion 23a, and an annular packing may be arranged along the groove. The packing is for covering the gap between the fixture main body 21 (reflecting portion 23a) and the light guide member 51, and acts as a so-called airtight packing that prevents water droplets, dust, etc. from entering the interior of the lighting fixture 11. .
位置決め部２２ａの１つには、位置決め部２２ａの表面から径方向内側に突出するネジ固定部２４が設けられている。ネジ固定部２４は、電源カバー３３のネジ取付部３３ｂと光源セット部８１のカバー取付部８４とをネジ等の取付部材により共締めするための部分である。
One of the positioning portions 22a is provided with a screw fixing portion 24 protruding radially inward from the surface of the positioning portion 22a. The screw fixing portion 24 is a portion for fastening together the screw mounting portion 33b of the power supply cover 33 and the cover mounting portion 84 of the light source set portion 81 with a mounting member such as a screw.
円筒部２２の内周面には、上下方向に平行に並ぶ２列の突条部２２ｄ・２２ｄが設けられている。突条部２２ｄは、径方向内側に向かって突出する部分である。突条部２２ｄは、上面視において略三角形状であり、傾斜角度が異なる第１傾斜面２２ｄ１と、第２傾斜面２２ｄ２を有している（図７参照）。第１傾斜面２２ｄ１は、被取付部Ｃに平行な断面において器具本体２１を回動させる方向に向かうにつれて器具本体２１の径方向内側に向かうように傾斜する傾斜面である。第１傾斜面２２ｄ１は、傾斜角度が相対的に小さくて勾配が相対的に緩やかな緩斜面(例えば円筒部２２の内周面に対して１０～３０度の斜面)である。第２傾斜面２２ｄ２は、傾斜角度が相対的に大きくて勾配が相対的に急な急斜面(例えば円筒部２２の内周面に対して６０～８５度の斜面)である。突条部２２ｄは、円筒部２２の下端部から上下方向に沿って円筒部２２の上端近傍まで延設される。突条部２２ｄは、器具本体２１を取付部材９１に取り付ける際に、後述する器具本体２１の弾性係合部９５が係合される被係合部分である。
なお、本実施形態では、突条部２２ｄを２列設けているが、１列もしくは３列以上であってもよい。また、本実施形態では、２列の突条部２２ｄ・２２ｄを同形状に形成したが、異なる形状に形成してもよい。例えば、一方の突条部２２ｄを他方の突条部２２ｄよりも内周面側に突出する寸法を大きく形成してもよい。器具本体２１を取付部材９１に取り付ける際に、弾性係合部９５が最初に乗り越える突条部２２ｄの内周面側に突出する寸法を大きく形成させることで、他方の突条部２２ｄよりも弾性係合部９５が乗り越えにくくすることができる。器具本体２１を取り付ける際に最初に乗り越える突条部２２ｄを乗り越えにくくさせることで、その後に乗り越える突条部２２ｄは最初の突条部２２ｄよりも少ない力で弾性係合部９５を乗り越えさせられることができる。これにより、弾性係合部９５が一方の突条部２２ｄのみ乗り越えた状態の取り付け不良を抑止することができる。
The inner peripheral surface of the cylindrical portion 22 is provided with two rows of ridges 22d, 22d arranged in parallel in the vertical direction. The ridge portion 22d is a portion that protrudes radially inward. The ridge portion 22d has a substantially triangular shape when viewed from above, and has a first inclined surface 22d1 and a second inclined surface 22d2 having different inclination angles (see FIG. 7). The first inclined surface 22d1 is an inclined surface that inclines radially inward of the instrument main body 21 in a cross section parallel to the attached portion C in the direction in which the instrument main body 21 is rotated. The first inclined surface 22d1 is a gentle slope with a relatively small angle of inclination and a relatively gentle gradient (for example, a slope of 10 to 30 degrees with respect to the inner peripheral surface of the cylindrical portion 22). The second inclined surface 22d2 is a steep slope with a relatively large angle of inclination and a relatively steep slope (for example, a slope of 60 to 85 degrees with respect to the inner peripheral surface of the cylindrical portion 22). The ridge portion 22d extends from the lower end portion of the cylindrical portion 22 to near the upper end of the cylindrical portion 22 along the vertical direction. The protruding portion 22d is an engaged portion with which an elastic engaging portion 95 of the instrument body 21, which will be described later, is engaged when the instrument body 21 is attached to the mounting member 91. As shown in FIG.
In addition, in this embodiment, two rows of the protrusions 22d are provided, but one row or three or more rows may be provided. Moreover, in the present embodiment, the two rows of protrusions 22d, 22d are formed in the same shape, but they may be formed in different shapes. For example, one of the protrusions 22d may be formed to be larger than the other protrusion 22d toward the inner peripheral surface. When the device main body 21 is attached to the mounting member 91, the projecting portion 22d, which the elastic engaging portion 95 first rides over, protrudes toward the inner peripheral surface side of the projecting portion 22d. It is possible to make it difficult for the engaging portion 95 to climb over. By making it difficult to climb over the first protrusion 22d when attaching the device body 21, the protrusion 22d to be subsequently climbed over can be made to climb over the elastic engaging part 95 with less force than the first protrusion 22d. can be done. As a result, it is possible to prevent an attachment failure in a state where the elastic engaging portion 95 has gotten over only one of the protrusions 22d.
詳細は後述するが、器具本体２１は、内部の清掃や器具本体２１の部品交換等のために、取付部材９１に対して着脱できる構造となっている。
また、器具本体２１の材質としては、アルミニウム合金以外であってもよく、例えばアルミニウム合金以外の金属素材、樹脂など必要に応じて適宜素材を選択することもできる。
Although the details will be described later, the instrument body 21 has a structure that can be attached to and detached from the mounting member 91 for cleaning the inside, replacing parts of the instrument body 21, and the like.
Further, the material of the device main body 21 may be other than an aluminum alloy. For example, a material other than an aluminum alloy, such as a metal material other than an aluminum alloy, a resin, or the like, may be appropriately selected.
電源部３１は、光源部４１が有するＬＥＤ素子４２に給電を行って、ＬＥＤ素子４２を点灯させるための電源装置である。電源部３１は、器具本体２１における光源部４１よりも上方（取付面側）に配置されている。電源部３１は、電源回路部３２と、該電源回路部３２を覆う電源カバー３３を有している。電源回路部３２は、直方体形状のケース部３２ａと、ケース部３２ａの内部に配置され、所定形状に加工されたプリント配線基板上に複数の電子部品が実装された電源回路３２ｂを有している。電源カバー３３は、平面視略半円形状の金属製の板状部材である。電源カバー３３は、平面視において電源回路部３２に重なるように配置されている。電源カバー３３は、係止片３３ａと、円弧形状の外周縁側にネジ孔を備えたネジ取付部３３ｂを有している。係止片３３ａは、光源セット部８１のカバー係止部８３に係止される。ネジ取付部３３ｂは、光源セット部８１のカバー取付部８４を介して器具本体２１のネジ固定部２４にネジ等の取付部材により共締めされる。電源部３１は、外部商用電源から供給される交流電流を所定の直流電流に変換し、変換後の電流を基板４３に実装された複数のＬＥＤ素子４２に供給するためのものである。
The power supply unit 31 is a power supply device for supplying power to the LED elements 42 of the light source unit 41 to light the LED elements 42 . The power supply unit 31 is arranged above (mounting surface side) the light source unit 41 in the instrument main body 21 . The power supply unit 31 has a power supply circuit unit 32 and a power supply cover 33 covering the power supply circuit unit 32 . The power supply circuit unit 32 has a rectangular parallelepiped case part 32a and a power supply circuit 32b arranged inside the case part 32a and having a plurality of electronic components mounted on a printed wiring board processed into a predetermined shape. . The power supply cover 33 is a metal plate-shaped member having a substantially semicircular shape in plan view. The power supply cover 33 is arranged so as to overlap the power supply circuit section 32 in plan view. The power supply cover 33 has a locking piece 33a and a screw attachment portion 33b having a screw hole on the arc-shaped outer peripheral edge side. The locking piece 33 a is locked to the cover locking portion 83 of the light source set portion 81 . The screw mounting portion 33b is fastened together with the screw fixing portion 24 of the fixture main body 21 via the cover mounting portion 84 of the light source set portion 81 with a mounting member such as a screw. The power supply unit 31 converts alternating current supplied from an external commercial power supply into a predetermined direct current, and supplies the converted current to a plurality of LED elements 42 mounted on a substrate 43 .
電源部３１は、配線（図示せず）を介して端子台１００に電気的に接続されている。例えば、照明器具１１を被取付部Ｃに取り付ける際、天井裏側の外部商用電源の電源電線（図示せず）を端子台１００に接続することで、電源部３１は外部商用電源と電気的に接続される。電源部３１と光源部４１は配線３７によって電気的に接続されている。
なお、本実施形態では、端子台１００を使用しているが、特に限定するものではない。例えば、端子台１００を使用する代わりに、コネクタ等の接続部品を使用する構成とすることもできる。
The power supply unit 31 is electrically connected to the terminal block 100 via wiring (not shown). For example, when the lighting fixture 11 is attached to the mounting portion C, the power supply portion 31 is electrically connected to the external commercial power supply by connecting a power cable (not shown) of an external commercial power supply on the back side of the ceiling to the terminal block 100. be done. The power supply unit 31 and the light source unit 41 are electrically connected by wiring 37 .
Although the terminal block 100 is used in this embodiment, it is not particularly limited. For example, instead of using the terminal block 100, it is also possible to use a connection part such as a connector.
光源部４１は、照明器具１１の照射面側に向けて光を出射する部分である。光源部４１は、光源である発光素子を有する光源モジュールである。本実施形態においては、発光素子として、基板４３上に複数の光源であるＬＥＤ（Ｌｉｇｈｔ ｅｍｉｔｔｉｎｇ ｄｉｏｄｅ）素子４２が表面実装されたＬＥＤ光源モジュールを使用している。具体的には、ＬＥＤ光源モジュールは、略円板状に加工された基板４３表面に、複数のＬＥＤ素子４２が周方向に等間隔に配列されたモジュールである。複数のＬＥＤ素子４２は、基板４３の外周縁の近傍に円環状の素子列として実装されている。光源部４１は、基板４３上に給電素子４４を有している。給電素子４４は、複数のＬＥＤ素子４２のうち二つのＬＥＤ素子４２の間に配置される。これにより、給電素子４４を配置するスペースを基板４３上に別途設ける必要がなく、基板４３をコンパクトにすることができる。光源部４１は、光源セット部８１の照射面側に配置される。複数のＬＥＤ素子４２は、導光部材５１の取付面側の外周端近傍に対向するように配置される。ＬＥＤ光源モジュールは、配線３７によって電源部３１と電気的に接続されている。ＬＥＤ光源モジュールは、基板４３の実装面の裏面が光源セット部８１の光源配置面８２に当接して配置されるため、ＬＥＤ光源モジュールが発熱した際には、ＬＥＤ光源モジュールの熱が光源セット部８１に伝わる。光源セット部８１に伝わった熱は、光源セット部８１の取付面側の周辺温度が光源セット部８１の温度よりも低い場合、光源セット部８１の取付面側の周辺の空気へ伝わる。また、光源セット部８１に伝わった熱の一部は、器具本体２１に伝わり、器具本体２１の周辺温度が器具本体２１の温度よりも低い場合、器具本体２１の周辺の空気へ伝わる。これにより、光源セット部８１に伝わった熱は、光源セット部８１や器具本体２１の周囲に放熱される。
The light source part 41 is a part that emits light toward the irradiation surface side of the lighting device 11 . The light source unit 41 is a light source module having a light emitting element as a light source. In this embodiment, an LED light source module in which a plurality of LED (light emitting diode) elements 42 as light sources are surface-mounted on a substrate 43 is used as the light emitting element. Specifically, the LED light source module is a module in which a plurality of LED elements 42 are arranged at regular intervals in the circumferential direction on the surface of a substrate 43 processed into a substantially disc shape. A plurality of LED elements 42 are mounted in the vicinity of the outer peripheral edge of the substrate 43 as an annular array of elements. The light source section 41 has a feed element 44 on a substrate 43 . The feeding element 44 is arranged between two LED elements 42 among the plurality of LED elements 42 . As a result, there is no need to separately provide a space on the substrate 43 for arranging the feeding element 44, and the substrate 43 can be made compact. The light source unit 41 is arranged on the irradiation surface side of the light source set unit 81 . The plurality of LED elements 42 are arranged so as to face the vicinity of the outer peripheral end of the light guide member 51 on the mounting surface side. The LED light source module is electrically connected to the power supply section 31 via wiring 37 . Since the LED light source module is arranged with the back surface of the mounting surface of the substrate 43 in contact with the light source placement surface 82 of the light source set portion 81, when the LED light source module generates heat, the heat of the LED light source module is transferred to the light source set portion. It is transmitted to 81. The heat transmitted to the light source setting portion 81 is transmitted to the air around the mounting surface side of the light source setting portion 81 when the ambient temperature of the mounting surface side of the light source setting portion 81 is lower than the temperature of the light source setting portion 81 . Also, part of the heat transmitted to the light source set portion 81 is transmitted to the fixture body 21, and is transmitted to the air around the fixture body 21 when the ambient temperature of the fixture body 21 is lower than the temperature of the fixture body 21. As a result, the heat transmitted to the light source set portion 81 is dissipated to the surroundings of the light source set portion 81 and the fixture main body 21 .
なお、本実施形態では、光源として表面実装型のＬＥＤ素子４２を用いたが、光源の種類はＬＥＤ素子に限定されず、例えばＣＯＢ型発光モジュールや有機ＥＬ素子（ＯＬＥＤ）などを用いても実現可能である。
また、基板４３は、熱伝導性シート（図示せず）や放熱グリスを介して光源セット部８１の光源配置面８２に取り付けてもよく、これにより、より高い放熱性を得ることもできる。
In this embodiment, the surface-mounted LED element 42 is used as the light source, but the type of the light source is not limited to the LED element. It is possible.
Further, the substrate 43 may be attached to the light source placement surface 82 of the light source set portion 81 via a heat conductive sheet (not shown) or heat dissipation grease, thereby obtaining higher heat dissipation.
導光部材５１は、少なくとも光源部４１の照射面側を覆うように器具本体２１に取り付けられ、光源部４１（ＬＥＤ素子４２）から出射された光を反射及び拡散させつつ導光し、導光部材５１の外部へ出射される光を配光制御する透光性部材である。導光部材５１の外周縁は、平面視において円環状に実装された複数のＬＥＤ素子４２と重なるように配置される。導光部材５１は、光源部４１（ＬＥＤ素子４２）から出射された光を導光して、面発光として導光部材５１の外部に出射可能である。導光部材５１は、円板状の部材である。導光部材５１は、透光性を有する樹脂素材で形成されている。導光部材５１は、拡散処理がなされている。本実施形態の導光部材５１においては、器具本体２１の開口から露出する照射面側の表面に対し、ドットパターンで白色（半透光性）のシルク印刷にて印刷層を形成させた。導光部材５１は、ドットパターンの印刷層を形成したものに限らず、例えば、ドットパターン以外の印刷層を形成したもの、微細な凹凸を表面に形成したシボ加工（フロスト加工）を施したもの、内部に拡散剤を混入させたもの、拡散反射シートを貼り付けたもので構成することもできる。また、導光部材５１の照射面側に拡散部材を別途設けてもよい。導光部材５１は、テーパ部５２と、照射面側に突出する凸部５３と、凸部５３の反対側の面に凹部５４とを有している。テーパ部５２は、導光部材５１の外周縁部から下方に向かうにつれて縮径するテーパ状の部分である。凸部５３は、テーパ部５２における光源部４１の給電素子４４に対応する位置で当該テーパ部５２から径方向外側に向けて突出する部分である。凸部５３は、環状反射部材７１の切欠き部７４に係合可能であり、環状反射部材７１に導光部材５１を取り付ける際に、導光部材５１の位置決めをすることができる。導光部材５１は、その外径寸法が環状反射部材７１の外径寸法よりも小さく、該環状反射部材７１のテーパ面７３に係止可能である。凹部５４は、光源部４１の給電素子４４に対応する位置に照射面側に凸となるように形成される。凹部５４は、光源部４１を配置する際に給電素子４４と係合することができ、光源部４１を導光部材５１における適正な位置に位置決めすることができる。導光部材５１は、器具本体２１の下方の開口を閉塞して、ＬＥＤ素子４２に埃などが付着することを防止する役割も有している。
The light guide member 51 is attached to the instrument main body 21 so as to cover at least the irradiation surface side of the light source unit 41, reflects and diffuses the light emitted from the light source unit 41 (LED element 42), guides the light, and guides the light. It is a translucent member that controls the distribution of light emitted to the outside of the member 51 . An outer peripheral edge of the light guide member 51 is arranged so as to overlap with a plurality of LED elements 42 mounted in an annular shape in plan view. The light guide member 51 can guide the light emitted from the light source unit 41 (LED element 42) and emit the light to the outside of the light guide member 51 as surface light emission. The light guide member 51 is a disk-shaped member. The light guide member 51 is made of a translucent resin material. The light guide member 51 is subjected to diffusion treatment. In the light guide member 51 of the present embodiment, a white (semi-translucent) silk-printed dot pattern is formed on the surface of the light guide member 51 exposed from the opening of the instrument body 21 by silk printing. The light guide member 51 is not limited to one having a dot pattern printed layer formed thereon. For example, the light guide member 51 has a printed layer other than the dot pattern formed thereon, or has a textured (frosted) surface having fine unevenness formed thereon. , a diffusing agent mixed therein, or a diffuse reflection sheet attached thereto. Further, a diffusion member may be separately provided on the irradiation surface side of the light guide member 51 . The light guide member 51 has a tapered portion 52 , a convex portion 53 that protrudes toward the irradiation surface, and a concave portion 54 on the opposite side of the convex portion 53 . The tapered portion 52 is a tapered portion whose diameter decreases downward from the outer peripheral edge portion of the light guide member 51 . The convex portion 53 is a portion that protrudes radially outward from the tapered portion 52 at a position corresponding to the feeding element 44 of the light source portion 41 in the tapered portion 52 . The convex portion 53 can be engaged with the notch portion 74 of the annular reflecting member 71 , and can position the light guiding member 51 when attaching the light guiding member 51 to the annular reflecting member 71 . The light guide member 51 has an outer diameter smaller than that of the annular reflecting member 71 and can be engaged with the tapered surface 73 of the annular reflecting member 71 . The concave portion 54 is formed at a position corresponding to the feeding element 44 of the light source portion 41 so as to protrude toward the irradiation surface side. The concave portion 54 can engage with the feeding element 44 when the light source portion 41 is arranged, and can position the light source portion 41 at an appropriate position in the light guide member 51 . The light guide member 51 also has a role of closing the lower opening of the device body 21 to prevent dust from adhering to the LED element 42 .
反射部材（第１反射部材）６１は、導光部材５１と対向する位置に配置され、ＬＥＤ素子４２から出射された光を反射する部材である。反射部材６１は、平面視略円形状でシート形状である。反射部材６１は、導光部材５１の取付面側に載置された状態で配置される。反射部材６１は、導光部材５１の取付面側（背面側）から出てきた光を導光部材５１の内部に向けて反射させる。反射部材６１は、ＬＥＤ素子４２から出射された光、及び導光部材５１の内壁面で反射された光を反射して照射面側に出射する。反射部材６１は、略円板状であり、切欠き部６２と、延出片６３を有している。切欠き部６２は、反射部材６１の外周縁において矩形状に切り欠かれた部分である。切欠き部６２は、光源部４１の給電素子４４が係合される部分である。延出片６３は、反射部材６１の外周縁において径方向に対向するともに、径方向外側に延出される一対の部分である。延出片６３・６３は、それぞれその先端が環状反射部材７１の取付面側の凹部７７・７７に係合するように配置されて位置決めされる。切欠き部６２に対して光源部４１の給電素子４４を係合するように光源部４１を配置することで、反射部材６１と光源部４１の位置決めをすることができる。このとき延出片６３・６３は、所定のＬＥＤ素子４２の間にそれぞれ配置されて、ＬＥＤ素子４２と重なることなく配置される。反射部材６１は、基板４３の照射面側の表面において円環状に実装された複数のＬＥＤ素子４２の径方向内側の領域に配置される。本実施形態では、反射部材６１は、その外周縁が複数のＬＥＤ素子４２に近接して配置されている。これにより、複数のＬＥＤ素子４２は、反射部材６１に覆われていない導光部材５１の外周縁部から内部に光を入射させることができる構成となっている。
The reflecting member (first reflecting member) 61 is arranged at a position facing the light guide member 51 and is a member that reflects the light emitted from the LED element 42 . The reflecting member 61 has a substantially circular shape in plan view and a sheet shape. The reflecting member 61 is placed on the mounting surface side of the light guide member 51 . The reflecting member 61 reflects the light emitted from the mounting surface side (back side) of the light guide member 51 toward the inside of the light guide member 51 . The reflecting member 61 reflects the light emitted from the LED element 42 and the light reflected by the inner wall surface of the light guide member 51 and emits the reflected light toward the irradiation surface. The reflecting member 61 is substantially disc-shaped and has a notch portion 62 and an extension piece 63 . The cutout portion 62 is a rectangular cutout portion in the outer peripheral edge of the reflecting member 61 . The notch portion 62 is a portion with which the power feeding element 44 of the light source portion 41 is engaged. The extending pieces 63 are a pair of portions that face each other in the outer peripheral edge of the reflecting member 61 in the radial direction and that extend outward in the radial direction. The extension pieces 63 are arranged and positioned so that their tips are engaged with the recesses 77 on the mounting surface side of the annular reflecting member 71, respectively. By arranging the light source unit 41 so as to engage the feeding element 44 of the light source unit 41 with respect to the notch portion 62, the reflecting member 61 and the light source unit 41 can be positioned. At this time, the extension pieces 63 are arranged between predetermined LED elements 42 so as not to overlap the LED elements 42 . The reflecting member 61 is arranged in a radially inner region of the plurality of LED elements 42 mounted in an annular shape on the irradiation surface side of the substrate 43 . In this embodiment, the reflective member 61 is arranged so that its outer peripheral edge is close to the plurality of LED elements 42 . As a result, the plurality of LED elements 42 are configured to allow light to enter inside from the outer peripheral edge portion of the light guide member 51 that is not covered with the reflecting member 61 .
なお、本実施形態では、反射部材６１は、基板４３と別体の部材として構成されているが、反射部材６１の代わりに、例えば、基板４３の照射面側の表面に、白色シールの貼り付けまたは白色塗装等を実行することで反射部を構成することもできる。
In the present embodiment, the reflecting member 61 is configured as a separate member from the substrate 43. Instead of the reflecting member 61, for example, a white sticker is attached to the irradiated surface side of the substrate 43. Alternatively, the reflecting portion can be formed by applying white paint or the like.
また、反射部材６１は、例えば外周縁部に照射面側に向けて突出する円柱状の凸部を設けて、導光部材５１に設けた凹部に係合可能となるように構成し、導光部材５１に対する反射部材６１の位置決めが容易にできるように構成してもよい。
In addition, the reflecting member 61 is configured such that, for example, a cylindrical convex portion protruding toward the irradiation surface is provided on the outer peripheral edge portion so as to be engageable with a concave portion provided in the light guide member 51, thereby guiding the light. The reflecting member 61 may be configured to be easily positioned with respect to the member 51 .
環状反射部材(第２反射部材)７１は、導光部材５１の外周縁の外側に配置され、当該外周縁を囲う反射部材である。環状反射部材７１は、円環状で樹脂製の部材である。環状反射部材７１は、外枠部７２と、テーパ面７３と、切欠き部７４と、配線配置部７５と、切欠き部７６と、凹部７７とを有している。外枠部７２は、略円筒状の部分である。テーパ面７３は、環状反射部材７１の内周側に設けられ、内周側縁部から上方に向かうにつれて拡径する傾斜面である。テーパ面７３は、ＬＥＤ素子４２の下方に配置されている。テーパ面７３は、導光部材５１のテーパ部５２から出る光を反射させる反射面である。テーパ面７３には、導光部材５１のテーパ部５２が当接して配置される。切欠き部７４は、テーパ面７３の一部が矩形状に切り欠かれた部分であり、導光部材５１の凸部５３が係合する部分である。環状反射部材７１の高さ寸法は、導光部材５１の上面に反射部材６１を配置した状態の高さ寸法よりも大きくなるように構成されている。切欠き部７６は、外枠部７２の一部を切り欠いた部分である。切欠き部７６は、複数（本実施形態では３箇所）設けられ、器具本体２１の下端凸部２２ｃと係合することができる。下端凸部２２ｃと切欠き部７６を係合させることによって、環状反射部材７１を器具本体２１における所定の位置に配置することができる。凹部７７は、上述したように、反射部材６１の延出片６３の先端と係合する部分であり、反射部材６１を位置決めすることができる。なお、凹部７７は、必須の構成ではない。導光部材５１の取付面側の表面に白色シール等を貼り付けて反射部を形成した場合には不要となる。
The annular reflecting member (second reflecting member) 71 is a reflecting member arranged outside the outer peripheral edge of the light guide member 51 and surrounding the outer peripheral edge. The annular reflecting member 71 is an annular member made of resin. The annular reflecting member 71 has an outer frame portion 72 , a tapered surface 73 , a notch portion 74 , a wiring placement portion 75 , a notch portion 76 and a recessed portion 77 . The outer frame portion 72 is a substantially cylindrical portion. The tapered surface 73 is provided on the inner peripheral side of the annular reflecting member 71 and is an inclined surface whose diameter increases upward from the inner peripheral side edge. The tapered surface 73 is arranged below the LED element 42 . The tapered surface 73 is a reflecting surface that reflects light emitted from the tapered portion 52 of the light guide member 51 . The tapered portion 52 of the light guide member 51 is arranged in contact with the tapered surface 73 . The cutout portion 74 is a rectangular cutout portion of the tapered surface 73 and is a portion with which the convex portion 53 of the light guide member 51 is engaged. The height dimension of the annular reflecting member 71 is configured to be larger than the height dimension in the state where the reflecting member 61 is arranged on the upper surface of the light guide member 51 . The notch portion 76 is a portion obtained by cutting out a portion of the outer frame portion 72 . A plurality of (three in this embodiment) notch portions 76 are provided and can be engaged with the lower end convex portion 22 c of the instrument main body 21 . By engaging the lower end projection 22c and the notch 76, the annular reflecting member 71 can be arranged at a predetermined position in the instrument body 21. As shown in FIG. The concave portion 77 is a portion that engages with the tip of the extending piece 63 of the reflecting member 61 as described above, and can position the reflecting member 61 . Note that the recess 77 is not an essential component. If a white sticker or the like is attached to the surface of the light guide member 51 on the mounting surface side to form the reflecting portion, it becomes unnecessary.
環状反射部材７１は、照明器具１１を組み立てる際に、器具本体２１の内部の下端隅部に最初に組み付けられる部材である。まず、下端凸部２２ｃに対して切欠き部７６を係合させるように環状反射部材７１を器具本体２１に組み付ける。これにより、環状反射部材７１を器具本体２１における適切な位置に位置決めして配置することができる。器具本体２１に環状反射部材７１が組み付けられた状態において、テーパ面７３と器具本体２１の反射部２３ａは、導光部材５１の外周縁部の形状に対応した受け部を構成し、当該受け部に導光部材５１が嵌合される。これにより、導光部材５１を容易に適切な位置に位置決めして、配置することができる。凹部７７と延出片６３の先端を係合させるように反射部材６１を配置する。これにより、反射部材６１を容易に適切な位置に位置決めして配置することができる。
The annular reflecting member 71 is a member that is first assembled to the lower end corner inside the fixture body 21 when the lighting fixture 11 is assembled. First, the annular reflecting member 71 is assembled to the instrument main body 21 so that the cutout portion 76 is engaged with the lower end convex portion 22c. Thereby, the annular reflecting member 71 can be positioned and arranged at an appropriate position in the instrument body 21 . In a state in which the annular reflecting member 71 is assembled to the instrument main body 21, the tapered surface 73 and the reflecting portion 23a of the instrument main body 21 constitute a receiving portion corresponding to the shape of the outer peripheral edge portion of the light guide member 51. The light guide member 51 is fitted in. Thereby, the light guide member 51 can be easily positioned and arranged at an appropriate position. The reflecting member 61 is arranged so that the tip of the extension piece 63 is engaged with the recess 77 . As a result, the reflecting member 61 can be easily positioned and arranged at an appropriate position.
外枠部７２は、光源部４１の給電素子４４から延びる配線３７に対応する位置において矩形状の切欠きである配線配置部７５を有している。配線配置部７５は配線３７を配置するためのものである。この配線配置部７５を設けることにより、配線３７を光源セット部８１の取付面側（背面側）に延ばすことが容易となり、電源部３１に接続し易くなる。
The outer frame portion 72 has a wiring placement portion 75 that is a rectangular notch at a position corresponding to the wiring 37 extending from the power feeding element 44 of the light source portion 41 . The wiring placement section 75 is for placing the wiring 37 . By providing the wiring arrangement portion 75 , it becomes easy to extend the wiring 37 to the mounting surface side (back side) of the light source set portion 81 , thereby facilitating connection to the power supply portion 31 .
また、本実施形態では、器具本体２１の内部に環状反射部材７１、導光部材５１、反射部材６１を順に組み付けた際に、導光部材５１の外周縁部の上部に断面視凹状で平面視円環状の素子収容部Ｓが形成される。素子収容部Ｓには、光源である複数のＬＥＤ素子４２が収容される。さらに、環状反射部材７１は導光部材５１の側面部の周囲を覆うとともに、反射部材６１は素子収容部Ｓを除く導光部材５１の上面を覆うように配置される。さらに、器具本体２１の反射部２３ａは、導光部材５１の照射面側において複数のＬＥＤ素子４２よりも径方向内側の領域を覆っている。このように構成することで、光源である複数のＬＥＤ素子４２と導光部材５１との間にほとんど距離（空間)を設けることなく、ＬＥＤ素子４２から出射される光を導光部材５１の内部の導くことができる。これにより、光源であるＬＥＤ素子４２、導光部材５１、反射部材６１及び環状反射部材７１の高さ寸法を抑えることができるため、ひいては照明器具１１の高さ寸法の増大化を防ぐことができる。また、このような構成によれば、導光部材５１の外周縁部である素子収容部Ｓのみから導光部材５１の内部にＬＥＤ素子４２から出る光を入射することができるため、入射光を効率的に導光可能となる。こうして、本実施形態の照明器具１１によれば、薄型でありながら均一性を高めた照明光を得ることができる。
Further, in this embodiment, when the annular reflecting member 71, the light guide member 51, and the reflecting member 61 are assembled in order inside the instrument main body 21, the upper portion of the outer peripheral edge of the light guide member 51 is recessed in cross section and planarly viewed. An annular element accommodating portion S is formed. The element housing portion S accommodates a plurality of LED elements 42 as light sources. Furthermore, the annular reflecting member 71 covers the periphery of the side surface of the light guide member 51 , and the reflecting member 61 is arranged to cover the upper surface of the light guide member 51 excluding the element housing portion S. Furthermore, the reflecting portion 23 a of the instrument main body 21 covers a region radially inside the plurality of LED elements 42 on the irradiation surface side of the light guide member 51 . With this configuration, the light emitted from the LED elements 42 can be transmitted to the inside of the light guide member 51 without providing a distance (space) between the plurality of LED elements 42 as light sources and the light guide member 51 . of can lead. As a result, the height dimensions of the LED element 42, the light guide member 51, the reflection member 61, and the annular reflection member 71, which are the light sources, can be suppressed, and an increase in the height dimension of the lighting device 11 can be prevented. . In addition, according to such a configuration, the light emitted from the LED element 42 can enter the interior of the light guide member 51 only from the element housing portion S, which is the outer peripheral portion of the light guide member 51. Therefore, the incident light can be Light can be guided efficiently. Thus, according to the lighting fixture 11 of the present embodiment, it is possible to obtain illumination light with improved uniformity while being thin.
光源セット部８１は、略円板状の金属製の部材である。光源セット部８１は、照射面側の略全面に亘って光源部４１と対向して光源部４１の高さ方向の位置を規制する面である光源配置面８２を有している。光源セット部８１には、光源配置面８２に光源部４１が配置され、取付面側に電源部３１及び端子台１００が配置される。光源配置面８２は、光源部４１から生じる熱を伝えるために、基板４３との接触面積を増やすために平らな表面を有するように形成されている。光源セット部８１は、取付面側に、カバー係止部８３、カバー取付部８４、端子台取付部８５、を有している。カバー係止部８３は、電源カバー３３の係止片３３ａが係止される部分である。係止片３３ａをカバー係止部８３に係止させることで、光源セット部８１における適切な位置に電源カバー３３を位置決めすることができる。カバー取付部８４は、光源セット部８１の外周縁からＬ字状に立設した部分の上面部分であり、ネジ孔が開口されている。端子台取付部８５は、端子台１００が取り付けられる部分である。
The light source set portion 81 is a substantially disk-shaped metal member. The light source set portion 81 has a light source placement surface 82 that faces the light source portion 41 over substantially the entire irradiation surface side and regulates the position of the light source portion 41 in the height direction. In the light source set portion 81, the light source portion 41 is arranged on the light source arrangement surface 82, and the power supply portion 31 and the terminal block 100 are arranged on the mounting surface side. The light source mounting surface 82 is formed to have a flat surface in order to increase the contact area with the substrate 43 in order to conduct heat generated from the light source section 41 . The light source set portion 81 has a cover locking portion 83, a cover mounting portion 84, and a terminal block mounting portion 85 on the mounting surface side. The cover locking portion 83 is a portion where the locking piece 33a of the power supply cover 33 is locked. By locking the locking piece 33 a to the cover locking portion 83 , the power supply cover 33 can be positioned at an appropriate position in the light source set portion 81 . The cover mounting portion 84 is an upper surface portion of a portion erected in an L shape from the outer peripheral edge of the light source set portion 81, and has a screw hole. The terminal block mounting portion 85 is a portion to which the terminal block 100 is mounted.
光源セット部８１の外周縁は、器具本体２１の円筒部２２の内周面の半径寸法と略同等の寸法である外側円弧部８６と、外側円弧部８６よりも小径で、光源セット部８１を器具本体２１の内部に収容する際に、対応する位置決め部２２ａ等を挿通可能に形成される切欠きである内側円弧部８７を有している。光源部４１及び電源部３１が取り付けられた光源セット部８１を器具本体２１に取り付ける際には、内側円弧部８７により位置決め部２２ａを通過させる。当該光源セット部８１を器具本体２１の底部に配置後、器具本体２１の周方向の一方側に所定長回動することで、外側円弧部８６が位置決め部２２ａの下方に配置される（図６参照）。具体的には、光源セット部８１のカバー取付部８４を器具本体２１のネジ固定部２４の位置まで周方向に回動させる。そうして、器具本体２１のネジ固定部２４に電源カバー３３のネジ取付部３３ｂと光源セット部８１のカバー取付部８４とを位置合わせした状態で、ネジ等の取付部材により共締めされる（図２参照）。このように、本実施形態では、器具本体２１に対して光源部４１と電源部３１を有する光源セット部８１を位置決めするともに、一つのネジ部材による固定だけで光源セット部８１を器具本体２１に安定して保持することができる。これにより、ネジ部材で固定する作業も少なく、光源セット部８１の器具本体２１への取付作業が容易となる。
The outer peripheral edge of the light source set portion 81 is composed of an outer arc portion 86 having a dimension substantially equal to the radial dimension of the inner peripheral surface of the cylindrical portion 22 of the fixture main body 21 and a smaller diameter than the outer arc portion 86. It has an inner circular arc portion 87 which is a notch formed so that the corresponding positioning portion 22a and the like can be inserted when it is housed inside the instrument main body 21 . When attaching the light source set portion 81 to which the light source portion 41 and the power supply portion 31 are attached to the fixture main body 21, the inner arc portion 87 allows the light source set portion 81 to pass through the positioning portion 22a. After the light source set portion 81 is arranged on the bottom portion of the fixture main body 21, the outer arc portion 86 is arranged below the positioning portion 22a by rotating the fixture main body 21 to one side in the circumferential direction by a predetermined length (see FIG. 6). reference). Specifically, the cover attachment portion 84 of the light source set portion 81 is rotated in the circumferential direction to the position of the screw fixing portion 24 of the fixture main body 21 . Then, the screw mounting portion 33b of the power supply cover 33 and the cover mounting portion 84 of the light source set portion 81 are aligned with the screw fixing portion 24 of the fixture main body 21, and are fastened together by a mounting member such as a screw ( See Figure 2). As described above, in this embodiment, the light source set portion 81 having the light source portion 41 and the power supply portion 31 is positioned with respect to the fixture main body 21, and the light source set portion 81 is fixed to the fixture main body 21 only by fixing with one screw member. It can be held stably. As a result, the work for fixing with screw members is reduced, and the work for attaching the light source set portion 81 to the fixture main body 21 is facilitated.
取付部材９１は、照明器具１１を被取付部Ｃに取り付ける際に、図示しないネジ等の取付部材により被取付部Ｃにあらかじめ取り付けられる、略円板状で樹脂製の部材である。取付部材９１は、器具本体２１を支持する支持部材でもあり、スタットとも呼ばれる。取付部材９１は、取付板９２、周壁部９３、被係止部９４、弾性係合部９５等を有している。
The mounting member 91 is a substantially disc-shaped member made of resin, which is attached in advance to the mounting portion C by a mounting member such as a screw (not shown) when the lighting device 11 is mounted to the mounting portion C. As shown in FIG. The attachment member 91 is also a support member that supports the instrument body 21 and is also called a stat. The mounting member 91 has a mounting plate 92, a peripheral wall portion 93, a locked portion 94, an elastic engaging portion 95, and the like.
取付板９２は、略円板状であり、取付部材９１を被取付部Ｃに取り付けた際に、被取付部Ｃに対向する部分である。取付板９２は、外部商用電源の電源電線（図示せず）を挿通するための貫通孔９２ａを有している。
周壁部９３は、取付板９２の外周縁から下方に延出される略円筒状の部分である。
The mounting plate 92 has a substantially disk shape, and is a portion that faces the mounting portion C when the mounting member 91 is mounted on the mounting portion C. As shown in FIG. The mounting plate 92 has a through hole 92a for inserting a power cable (not shown) of an external commercial power source.
The peripheral wall portion 93 is a substantially cylindrical portion extending downward from the outer peripheral edge of the mounting plate 92 .
被係止部９４は、取付部材９１の外周縁部に設けられている。被係止部９４は、周壁部９３の周方向の複数箇所（本実施形態では、３箇所）に設けられている。被係止部９４は、切欠き部９４ａと、切欠き部９４ａの周方向の一端部に隣接する案内部９４ｂと、を有している。切欠き部９４ａは、周壁部９３において側面視矩形状に切り欠いた部分であり、周方向の長さ寸法が器具本体２１の係止部２２ｂの周方向の長さ寸法よりも大きくなるように形成されている。これにより、器具本体２１を取付部材９１に取り付ける際、切欠き部９４ａに器具本体２１の係止部２２ｂを係合させることで器具本体２１を位置決めすることができる。案内部９４ｂは、周壁部９３の外周面よりも径方向内側に配置される、短冊状の段差部分である。案内部９４ｂは、器具本体２１を取付部材９１に取り付ける際に器具本体２１を回動する方向に向かうにつれて被取付部Ｃ側（上方）に向かうように傾斜するテーパ面９４ｃを有している。テーパ面９４ｃは、湾曲状の面である。案内部９４ｂは、器具本体２１を取付部材９１に取り付けるために周方向に回動した際に、器具本体２１の係止部２２ｂを所定の高さ位置（係止位置）まで案内するためのものである。このように案内部９４ｂを構成することで、テーパ面９４ｃの先端側（切欠き部９４ａ側）が終端側よりも下方に下がっているため、器具本体２１の係止部２２ｂを案内部９４ｂの終端側に係止する際に係止しやすく、かつ器具本体２１を回動するだけで係止部２２ｂを所定の高さ位置（係止位置）まで案内することができる（図８Ａ参照）。
The locked portion 94 is provided on the outer peripheral edge portion of the mounting member 91 . The locked portions 94 are provided at a plurality of locations (three locations in this embodiment) in the circumferential direction of the peripheral wall portion 93 . The locked portion 94 has a notch portion 94a and a guide portion 94b adjacent to one circumferential end portion of the notch portion 94a. The notch portion 94a is a portion cut out in a rectangular shape in a side view of the peripheral wall portion 93 so that the length dimension in the circumferential direction is larger than the length dimension in the circumferential direction of the locking portion 22b of the device main body 21. formed. Accordingly, when attaching the instrument main body 21 to the mounting member 91, the instrument main body 21 can be positioned by engaging the locking portion 22b of the instrument main body 21 with the notch 94a. The guide portion 94b is a strip-shaped stepped portion arranged radially inward of the outer peripheral surface of the peripheral wall portion 93 . The guide portion 94b has a tapered surface 94c that inclines toward the attached portion C (upward) in the direction in which the instrument body 21 is rotated when the instrument body 21 is attached to the mounting member 91 . The tapered surface 94c is a curved surface. The guide portion 94b guides the locking portion 22b of the instrument body 21 to a predetermined height position (locking position) when the instrument body 21 is rotated in the circumferential direction to attach the instrument body 21 to the mounting member 91. is. By configuring the guide portion 94b in this way, the tip side (notch portion 94a side) of the tapered surface 94c is lower than the terminal end side. It is easy to lock when locking on the terminal side, and the locking portion 22b can be guided to a predetermined height position (locking position) simply by rotating the instrument body 21 (see FIG. 8A).
また、係止部２２ｂを案内部９４ｂにより所定の高さ位置（係止位置）まで移動した際、案内部９４ｂの下端部は、位置決め部２２ａの上端部に乗り上げるようにして位置決めされるため、取付部材９１に対して器具本体２１をガタツキ無く取り付けることができる（図８Ｂ参照）。
なお、本実施形態のテーパ面９４ｃは、湾曲面で構成されているが、湾曲面の代わりに、例えば平坦面又は途中部が屈曲した屈曲面であってもよい。
Further, when the locking portion 22b is moved to a predetermined height position (locking position) by the guide portion 94b, the lower end portion of the guide portion 94b is positioned so as to ride on the upper end portion of the positioning portion 22a. The device main body 21 can be attached to the attachment member 91 without rattling (see FIG. 8B).
Note that the tapered surface 94c of the present embodiment is configured by a curved surface, but instead of the curved surface, for example, a flat surface or a curved surface having a curved portion in the middle may be used.
また、案内部９４ｂは、周方向において切欠き部９４ａに隣接する先端部９４ｄが角面取り加工されている（図６参照）。これにより、当該先端部９４ｄが角部の場合と比べて、器具本体２１を取り付ける際に、器具本体２１の係止部２２ｂがぶつかって、引っ掛かることを抑えることができる。
The guide portion 94b is chamfered at the tip portion 94d adjacent to the notch portion 94a in the circumferential direction (see FIG. 6). As a result, compared to the case where the distal end portion 94d is a corner portion, it is possible to prevent the locking portion 22b of the instrument body 21 from colliding and getting caught when the instrument body 21 is attached.
弾性係合部９５は、平面視略Ｕ字形状のバネ部９６と、バネ部９６を保持するバネ保持部９７とを有している。バネ部９６は、先端部９６ａと、延長部９６ｂ・９６ｂと、基端部９６ｃ・９６ｃとを有する。先端部９６ａは、半円周形状の曲面で形成されている。先端部９６ａは、バネ部９６において径方向外側に突出している部分である。延長部９６ｂ・９６ｂは、先端部９６ａの両端からそれぞれ直線状に延びるように形成されている。基端部９６ｃ・９６ｃは、延長部９６ｂの先端部９６ａとは反対側の端部から略垂直に外側に向かうように折り曲げられてそれぞれ形成されている。バネ保持部９７は、基部９７ａと、第１凸部９７ｂ・９７ｂと、第２凸部９７ｃとを有する。基部９７ａは、取付部材９１の取付板９２の外周側の位置において下方に突出する部分である。基部９７ａは、バネ部９６の高さ方向の位置を位置決めする。第１凸部９７ｂ・９７ｂおよび第２凸部９７ｃは、基部９７ａから下方に突出する部分である。第１凸部９７ｂ・９７ｂおよび第２凸部９７ｃは、バネ部９６の変形を規制する部分である。第１凸部９７ｂ・９７ｂは、略矩形形状に形成され、バネ部９６の延長部９６ｂ・９６ｂの外側にそれぞれ配置される。第２凸部９７ｃは、平面視でハット型に形成され、外周方向に突出する台形形状を有する。第２凸部９７ｃの台形形状部分は、上底の寸法がバネ部９６の延長部９６ｂ・９６ｂ同士の距離よりも小さく、下底の寸法が延長部９６ｂ・９６ｂ同士の距離よりも大きくなるように形成されている。第２凸部９７ｃは、バネ部９６の基端部９６ｃ・９６ｃの間に配置される。弾性係合部９５は、バネ部９６が径方向外側に向けて押圧力が働くようにバネ保持部９７に保持されている。詳細は後述するが、弾性係合部９５は、バネ部９６の径方向外側の先端部９６ａが器具本体２１の突条部２２ｄに接触した際に掛かる径方向内側に向かう力に応じて出没可能に構成されている。
The elastic engaging portion 95 has a spring portion 96 that is approximately U-shaped in plan view, and a spring holding portion 97 that holds the spring portion 96 . The spring portion 96 has a distal end portion 96a, extension portions 96b, 96b, and base end portions 96c, 96c. The tip portion 96a is formed with a semicircular curved surface. The distal end portion 96a is a portion of the spring portion 96 that protrudes radially outward. The extension portions 96b, 96b are formed to extend linearly from both ends of the tip portion 96a. The base end portions 96c, 96c are formed by bending outward from the end portion of the extension portion 96b opposite to the tip portion 96a substantially perpendicularly. The spring holding portion 97 has a base portion 97a, first convex portions 97b and 97b, and a second convex portion 97c. The base portion 97 a is a portion of the mounting member 91 that protrudes downward at a position on the outer peripheral side of the mounting plate 92 . The base portion 97a positions the position of the spring portion 96 in the height direction. The first protrusions 97b and 97b and the second protrusion 97c are portions protruding downward from the base 97a. The first convex portions 97b and 97b and the second convex portion 97c are portions that restrict deformation of the spring portion 96. As shown in FIG. The first convex portions 97b, 97b are formed in a substantially rectangular shape and are arranged outside the extension portions 96b, 96b of the spring portion 96, respectively. The second convex portion 97c is formed in a hat shape in plan view and has a trapezoidal shape protruding in the outer peripheral direction. The trapezoidal portion of the second convex portion 97c has an upper base smaller than the distance between the extensions 96b and 96b of the spring portion 96 and a lower base larger than the distance between the extensions 96b and 96b. is formed in The second convex portion 97c is arranged between the proximal end portions 96c of the spring portion 96. As shown in FIG. The elastic engaging portion 95 is held by the spring holding portion 97 so that the spring portion 96 exerts a pressing force radially outward. Although the details will be described later, the elastic engaging portion 95 can appear and retract according to the radially inward force applied when the radially outer tip portion 96a of the spring portion 96 contacts the ridge portion 22d of the instrument main body 21. is configured to
上述したように取付部材９１には、器具本体２１の係止部２２ｂを係止するために被係止部９４が設けられている。器具本体２１を取付部材９１に取り付ける場合、作業者は器具本体２１を手で把持した状態で、係止部２２ｂを被係止部９４の切欠き部９４ａに挿入し、この状態のまま器具本体２１を周方向の一方に回動する。この回動の際には係止部２２ｂが案内部９４ｂにより係止位置（係止部２２ｂの回動方向の終端位置）まで案内されるとともに案内部９４ｂの下端部が位置決め部２２ａの上端に乗り上げる。同時に、この回動の際には、取付部材９１に設けられた弾性係合部９５が器具本体２１の内周面を押圧しながら周方向に移動する。その際に突条部２２ｄに差し掛かると、先ず当該突条部２２ｄの緩やかな斜面である第１傾斜面２２ｄ１に沿って弾性係合部９５のバネ部９６の先端部９６ａが径方向内側に移動する。このとき、延長部９６ｂと基端部９６ｃは、第１凸部９７ｂと第２凸部９７ｃとに規制されて、バネ部９６は延長部９６ｂと基端部９６ｃが外側に広がるように変形する。さらに回動すると、当該バネ部９６が突条部２２ｄの頂部を乗り越えて第２傾斜面２２ｄ２に至ると、バネ部９６の復元力によりバネ部９６は元の形状に戻り、先端部９６ａは元の位置に戻る。これにより、器具本体２１が取付部材９１に対して回転しないようにする回転止めとなる（本実施形態では、突条部２２ｄが二つ設けられるため、この過程が２回繰り返される）。ここで、突条部２２ｄを平面視で見てみると、一方（取り外し時の回動方向側）の第１傾斜面２２ｄ１よりも他方（取り付け時の回動方向側）の第２傾斜面２２ｄ２を急峻となるように構成することで、器具本体２１が取り外し方向に回動してもバネ部９６が突条部２２ｄを乗り越えにくい構造となっている。このため、振動等により不意に器具本体２１が取付部材９１から外れることを防止することができる。
As described above, the mounting member 91 is provided with the locked portion 94 for locking the locking portion 22b of the instrument main body 21 . When attaching the device main body 21 to the mounting member 91, the operator holds the device main body 21 by hand, inserts the locking portion 22b into the notch portion 94a of the locked portion 94, and holds the device main body in this state. 21 is rotated in one circumferential direction. During this rotation, the locking portion 22b is guided by the guiding portion 94b to the locking position (end position of the turning direction of the locking portion 22b), and the lower end portion of the guiding portion 94b is aligned with the upper end of the positioning portion 22a. ride up. At the same time, during this rotation, the elastic engaging portion 95 provided on the mounting member 91 moves in the circumferential direction while pressing against the inner peripheral surface of the instrument main body 21 . At this time, when the projecting portion 22d is reached, the distal end portion 96a of the spring portion 96 of the elastic engaging portion 95 moves radially inward along the first inclined surface 22d1, which is a gentle slope of the projecting portion 22d. Moving. At this time, the extension portion 96b and the base end portion 96c are regulated by the first protrusion 97b and the second protrusion 97c, and the spring portion 96 deforms so that the extension portion 96b and the base end portion 96c expand outward. . Further rotation causes the spring portion 96 to climb over the top of the ridge portion 22d and reach the second inclined surface 22d2. position. This serves as a rotation stopper that prevents the instrument main body 21 from rotating with respect to the mounting member 91 (in this embodiment, since two protrusions 22d are provided, this process is repeated twice). Here, when the protrusion 22d is viewed in a plan view, the second inclined surface 22d2 on the other side (rotating direction side when attached) is closer than the first inclined surface 22d1 on one side (rotating direction side when removing). is steep, the spring portion 96 is less likely to climb over the ridge portion 22d even when the instrument body 21 rotates in the removal direction. Therefore, it is possible to prevent the device main body 21 from unexpectedly coming off from the mounting member 91 due to vibration or the like.
器具本体２１を取付部材９１に取り付ける際の器具本体２１の回動時において、バネ部９６の先端部９６ａが突条部２２ｄ・２２ｄに当接しながら乗り越える際には２回先端部９６ａの係合音が発生する。これにより、器具本体２１が取付部材９１に確実に取付けられたことを作業者は知覚することができる。一方、器具本体２１を外すための回動時には、バネ部９６の先端部９６ａが突条部２２ｄ・２２ｄに当接しながら乗り越える際には２回先端部９６ａの係合解除音が発生する。これにより、器具本体２１が取付部材９１から確実に取り外されたことを作業者は知覚することができる。また、器具本体２１を取付部材９１から取り外す場合は、取付部材９１に対して器具本体２１を上記回動方向とは反対方向に回動することで容易に取り外すことができる。
When the tool body 21 is rotated when the tool body 21 is attached to the mounting member 91, the tip part 96a of the spring part 96 is engaged twice when the tip part 96a of the spring part 96 rides over the protrusions 22d. A sound is produced. This allows the operator to perceive that the instrument main body 21 is securely attached to the attachment member 91 . On the other hand, when the instrument main body 21 is turned to remove it, when the tip 96a of the spring portion 96 rides over the protrusions 22d while contacting them, the tip 96a makes disengagement sounds twice. This allows the operator to perceive that the tool main body 21 has been reliably removed from the mounting member 91 . Further, when the instrument main body 21 is to be removed from the mounting member 91 , the instrument body 21 can be easily removed by rotating the instrument body 21 with respect to the mounting member 91 in the direction opposite to the above-described rotational direction.
このように係止部２２ｂを被係止部９４に係止することで、器具本体２１は取付部材９１に取り付けられる。また、器具本体２１が取付部材９１に取り付けられた状態で器具本体２１を周方向の他方に回動させると、器具本体２１の係止部２２ｂが取付部材９１の被係止部９４から外れて、器具本体２１を取付部材９１から取り外すことができる。
By locking the locking portion 22 b to the locked portion 94 in this manner, the instrument main body 21 is attached to the mounting member 91 . Further, when the instrument main body 21 is rotated in the other circumferential direction while the instrument main body 21 is attached to the mounting member 91 , the locking portion 22 b of the instrument main body 21 is disengaged from the locked portion 94 of the mounting member 91 . , the instrument body 21 can be removed from the mounting member 91 .
以上説明した本実施形態に係る照明器具１１によれば、光源部４１の複数のＬＥＤ素子４２は、導光部材５１の外周端近傍に対向して配置され、導光部材５１と対向する位置にＬＥＤ素子４２から出射された光を反射する反射部材６１を有している。これにより、反射部材６１は、導光部材５１の取付面側（背面側）から出てきた光を導光部材５１の内部に向けて反射させる。反射部材６１は、ＬＥＤ素子４２から出射された光、及び導光部材５１の内壁面で反射された光を反射して照射面側に出射することができる。また、反射部材６１は、ＬＥＤ素子４２の基板４３からの高さ寸法に対して同じもしくはやや低くなるように構成されている。これにより、嵩が高くない反射部材を構成することができる。ひいては、光源としてＬＥＤ素子４２を有し、かつ薄型の均一性を高めた照明光を得られる照明器具を提供することができる。特に電源部３１を収容した照明器具において、広い照射面を確保したまま薄型化を実現することができる。また、照明器具１１を取り付ける際に、外部商用電源と接続させるためのスペースを広く確保することができ、照明器具１１の取付作業がしやすくなる。
According to the lighting fixture 11 according to the present embodiment described above, the plurality of LED elements 42 of the light source section 41 are arranged in the vicinity of the outer peripheral end of the light guide member 51 so as to face the light guide member 51 . It has a reflecting member 61 that reflects the light emitted from the LED element 42 . Thereby, the reflecting member 61 reflects the light emitted from the mounting surface side (back side) of the light guide member 51 toward the inside of the light guide member 51 . The reflecting member 61 can reflect the light emitted from the LED element 42 and the light reflected by the inner wall surface of the light guide member 51 and emit the reflected light toward the irradiation surface. Also, the reflecting member 61 is configured to be the same as or slightly lower than the height dimension of the LED element 42 from the substrate 43 . This makes it possible to construct a reflection member that is not bulky. As a result, it is possible to provide a lighting fixture that has the LED element 42 as a light source and that is thin and can provide illumination light with improved uniformity. In particular, in a lighting fixture that accommodates the power supply unit 31, it is possible to reduce the thickness while ensuring a wide irradiation surface. In addition, when installing the lighting fixture 11, it is possible to ensure a large space for connecting to an external commercial power supply, and the work of installing the lighting fixture 11 is facilitated.
また、本実施形態の照明器具１１では、導光部材５１の外周縁の外側に当該外周縁を囲う環状反射部材７１をさらに有している。これにより、上記反射部材６１は主に導光部材５１の上面から出る光を反射するとともに、環状反射部材７１は導光部材５１の側方から出る光を確実に反射することができるため、より均一性を高めた照明光を得ることができる。
また、本実施形態の照明器具１１では、環状反射部材７１の高さ寸法は、ＬＥＤ素子４２の高さ寸法と環状反射部材７１の高さ寸法とを足した寸法と略同等になるように構成されている。このように構成することで、照明器具１１を上下方向に大型化させることなく照明器具１１の小型化が図れる。すなわち、薄型の照明器具を実現することができる。
Further, the lighting fixture 11 of the present embodiment further includes an annular reflecting member 71 surrounding the outer peripheral edge of the light guide member 51 outside the outer peripheral edge of the light guide member 51 . As a result, the reflecting member 61 mainly reflects the light emitted from the upper surface of the light guide member 51, and the annular reflecting member 71 can reliably reflect the light emitted from the side of the light guide member 51. Illumination light with improved uniformity can be obtained.
Further, in the lighting fixture 11 of the present embodiment, the height dimension of the annular reflecting member 71 is configured to be approximately equal to the sum of the height dimension of the LED element 42 and the height dimension of the annular reflecting member 71. It is By configuring in this way, the size of the lighting device 11 can be reduced without increasing the size of the lighting device 11 in the vertical direction. That is, a thin lighting fixture can be realized.
また、本実施形態の照明器具１１では、器具本体２１は、導光部材５１の照射面側と対向するとともに、平面視においてＬＥＤ素子４２と重なる反射部２３ａをさらに有している。このように、反射部２３ａは、ＬＥＤ素子４２の少なくとも一部と重なるように配置されることで、ＬＥＤ素子４２が発する光の直接光を遮るため、ユーザーの目に直接ＬＥＤ素子４２が発する光が達することを抑えることできる。これにより、照明光のムラを抑えるとともに、グレアを軽減した照明光を得ることができる。
In addition, in the lighting fixture 11 of the present embodiment, the fixture body 21 further has a reflecting portion 23a that faces the irradiation surface side of the light guide member 51 and overlaps the LED element 42 in plan view. In this way, the reflecting portion 23a is arranged so as to overlap with at least a part of the LED element 42, thereby blocking the direct light emitted by the LED element 42, so that the light emitted by the LED element 42 directly reaches the user's eyes. can be prevented from reaching As a result, it is possible to obtain illumination light with reduced glare while suppressing unevenness of the illumination light.
また、本実施形態の照明器具１１では、器具本体２１は、器具本体２１内での光源セット部８１の高さ方向の位置決めをする位置決め部２２ａをさらに有している。これにより、光源セット部８１を器具本体２１内の所望の位置に位置決めして、保持することができる。
In addition, in the lighting fixture 11 of the present embodiment, the fixture body 21 further has a positioning portion 22a for positioning the light source set section 81 in the fixture body 21 in the height direction. As a result, the light source set portion 81 can be positioned and held at a desired position within the instrument main body 21 .
また、本実施形態の照明器具１１では、取付部材９１に対して器具本体２１を回動させることで、器具本体２１の係止部２２ｂが取付部材９１の被係止部９４（案内部９４ｂ）に案内されるとともに係止される。さらに、取付部材９１に対して器具本体２１を回動させることで、バネ部９６の先端部９６ａが突条部２２ｄ・２２ｄに当接しながら乗り越える。これにより、被取付部Ｃに固定された取付部材９１に器具本体２１をネジ止め作業を必要とせずに取り付けることができる。すなわち、照明器具１１を被取付部Ｃに取り付ける際に、ネジ止め作業が少なく、取付作業を容易に行うことができる。また、バネ部９６を突条部２２ｄ・２２ｄを乗り越えさせることで、器具本体２１の回転止めとなり、器具本体２１が取付部材９１から脱落することを防止する。また、本実施形態の照明器具１１のように、突条部２２ｄを複数設けた場合は、器具本体２１の脱落を更に防止することができる。
Further, in the lighting device 11 of the present embodiment, by rotating the device body 21 with respect to the mounting member 91 , the locking portion 22 b of the device body 21 is moved to the locked portion 94 (guide portion 94 b ) of the mounting member 91 . is guided to and locked. Furthermore, by rotating the tool main body 21 with respect to the mounting member 91, the tip portion 96a of the spring portion 96 overcomes the protrusions 22d while contacting them. As a result, the device main body 21 can be attached to the attachment member 91 fixed to the attached portion C without requiring a screwing operation. That is, when the lighting device 11 is attached to the attachment portion C, there is little screwing work, and the attachment work can be easily performed. Also, by letting the spring part 96 ride over the ridges 22 d , 22 d , it serves as a rotation stopper for the instrument body 21 and prevents the instrument body 21 from dropping off from the mounting member 91 . Further, when a plurality of protrusions 22d are provided as in the lighting device 11 of the present embodiment, it is possible to further prevent the device main body 21 from coming off.
また、本実施形態の照明器具１１では、突条部２２ｄは、被取付部Ｃに平行な断面において器具本体２１を回動させる方向に向かうにつれて器具本体２１（円筒部２２）の内周面から器具本体２１の径方向内側に向かうように傾斜する傾斜面である第１傾斜面２２ｄ１を有している。これにより、器具本体２１の取付時にバネ部９６の先端部９６ａが突条部２２ｄを乗り越えやすく、器具本体２１を取付けしやすい。一方、上述したように第１傾斜面２２ｄ１に隣接して第１傾斜面２２ｄ１より傾斜している第２傾斜面２２ｄ２を有している。これにより、器具本体２１の取り外しの際に回動方向の逆方向に器具本体２１を回動する場合は、突条部２２ｄを乗り越えにくいため、不意に器具本体２１が取付部材９１から脱落することを防止することができる。
In addition, in the lighting device 11 of the present embodiment, the protrusion 22d extends from the inner peripheral surface of the device main body 21 (cylindrical portion 22) toward the direction in which the device main body 21 is rotated in a cross section parallel to the attached portion C. It has a first inclined surface 22d1 that is an inclined surface that is inclined radially inwardly of the tool body 21 . As a result, the distal end portion 96a of the spring portion 96 can easily climb over the ridge portion 22d when attaching the instrument main body 21, and the instrument main body 21 can be easily attached. On the other hand, as described above, it has the second inclined surface 22d2 adjacent to the first inclined surface 22d1 and inclined more than the first inclined surface 22d1. As a result, when the tool body 21 is rotated in the direction opposite to the rotating direction when the tool body 21 is removed, it is difficult to get over the protrusion 22d, so that the tool body 21 is prevented from unexpectedly falling off from the mounting member 91. can be prevented.
また、本実施形態の照明器具１１では、取付部材９１の被係止部９４の先端部９４ｄが平面視で角取りされている。これにより、器具本体２１を取付部材９１に取り付ける際に、器具本体２１の係止部２２ｂの先端と先端部９４ｄとが接触しにくくなり、取付作業がしやすい。
Further, in the lighting fixture 11 of the present embodiment, the front end portion 94d of the locked portion 94 of the mounting member 91 is chamfered in plan view. As a result, when attaching the instrument main body 21 to the mounting member 91, the distal end of the locking portion 22b of the instrument main body 21 and the distal end portion 94d are less likely to come into contact with each other, thereby facilitating the mounting operation.
