JP6089275B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture.

  Conventionally, a housing installed in a mounting hole formed on the ceiling surface and containing a light source can be rotated around an axis perpendicular to the ceiling surface and centered on a line parallel to the ceiling surface There was a lighting fixture that was rotatable (see, for example, Patent Document 1).

JP 2007-317556 A

  In the luminaire described in Patent Document 1, the housing that houses the light source is rotatable around a line parallel to the ceiling surface, so that the object to be irradiated is not directly under the luminaire. Also, light can be irradiated by rotating the housing. However, when the rectangular object is arranged obliquely with respect to the optical axis direction, the edge of the object to be irradiated is out of the light distribution area, and the necessary brightness cannot be secured at the edge of the object to be irradiated. There was sex.

  This invention is made | formed in view of the said subject, The place made into the objective is to provide the lighting fixture which can adjust light distribution more finely.

The lighting fixture of the present invention includes a lamp that holds a light source, a frame portion that is fixed around a mounting hole provided on a ceiling surface, and a support portion that supports the lamp and is attached to the frame portion. Is provided. The support portion includes a mounting member attached to the frame portion, Ru and an arm attached to rotatably the mounting member about a first axis of rotation parallel to the ceiling surface. The arm includes a central piece and protruding pieces that protrude in the same direction from both sides of the central piece. The projecting piece is provided with the first rotating shaft, and the central piece is provided with a second rotating shaft orthogonal to the first rotating shaft. The lamp is attached to the arm so as to be rotatable about a second rotation axis orthogonal to the first rotation axis.

  The lighting apparatus includes a pressing member that is attached to the frame portion and holds the attachment member between the frame portion, and the attachment member is rotatable about a third rotation axis that is orthogonal to the ceiling surface. In this state, it is also preferable to hold the frame portion and the pressing member.

  In this lighting fixture, it is also preferable that the light distribution of the irradiation light from the light source is an elliptical light distribution whose major axis is a direction parallel to the second rotation axis.

  According to the present invention, the light distribution region is slid along the direction parallel to the ceiling surface and orthogonal to the first rotation axis by rotating the arm around the first rotation axis with respect to the mounting member. Can do. In addition, by rotating the lamp around the second rotation axis with respect to the arm, the light distribution region can be slid along the direction parallel to the ceiling surface and orthogonal to the second rotation axis. Therefore, since the light distribution area can be slid in two directions orthogonal to each other in a plane parallel to the ceiling surface, the light distribution can be adjusted more finely.

The lighting fixture in embodiment is shown, (a) is the external appearance perspective view seen from the lower side, (b) is the external appearance perspective view seen from the upper side. It is an exploded perspective view same as the above. (A) is the external appearance perspective view same as the above, (b) is a perspective view of the state in which the lamp unit is attached to the frame unit. The same lens is shown, (a) is the perspective view seen from the lower side, (b) is the perspective view seen from the upper side. The state which the lamp unit same as the above has moved to the position which illuminates directly under is shown, (a) is a front view, (b) is a rear view, (c) is a right view, (d) is a bottom view. The lamp unit same as the above shows a state rotated about the first rotation axis, (a) is a front view, (b) is a rear view, (c) is a right side view, and (d) is a bottom view. The lamp unit same as the above shows a state where the lamp unit is rotated around the first and second rotation axes, (a) is a front view, (b) is a rear view, (c) is a right side view, and (d) is a lower surface. FIG. It is explanatory drawing of a light distribution characteristic same as the above, (a) is explanatory drawing of the state which is illuminating right below, (b) is explanatory drawing of the state which the lamp unit rotated centering around the 1st rotating shaft, (c) FIG. 4 is an explanatory diagram of a state in which the lamp unit is rotated around a first rotational axis and a second rotational axis, and (d) is an explanatory diagram of a state in which the lamp unit is rotated around a first rotational axis and a third rotational axis. .

  The lighting fixture of this embodiment is demonstrated based on FIGS.

  The lighting fixture 1 of this embodiment is used in a state where an upper portion is embedded in a mounting hole formed in a ceiling material. In the following description, unless otherwise specified, the vertical direction is defined based on the state in which the lighting fixture is attached to the ceiling material. This direction is defined for convenience of description.

  As shown in FIGS. 1 to 3 and FIGS. 5 to 7, the lighting fixture 1 includes a lamp unit 2 (lamp), a frame unit 3 (frame part), and a support unit 4 (support part). Yes.

  As illustrated in FIG. 2, the lamp unit 2 includes a main body 21 that holds an LED (Light Emitting Diode) that is a light source, and a front frame 22 that is attached to the lower side of the main body 21 so as to surround the LED. .

  The main body 21 is made of, for example, an aluminum die-cast product. The main body 21 includes a disk-shaped main portion 21a and a plurality of heat radiation fins 21b protruding upward from the upper surface of the main portion 21a. One or more LEDs (not shown) are arranged on the lower surface of the main portion 21a, and the LED light is irradiated downward when attached to the ceiling material. The light source is not limited to the LED, and may be a semiconductor light emitting element such as an organic EL, or a halogen lamp or a fluorescent lamp.

  The front frame 22 is made of, for example, an aluminum die-cast product. The front frame 22 is formed in a cylindrical shape whose upper end and lower end are opened. Inside the front frame 22, a reflecting mirror 23, a lens 24, and an antiglare member 25 are accommodated.

  The reflecting mirror 23 is made of a molded product of a synthetic resin (for example, polybutylene terephthalate (PBT)), and is formed in a cylindrical shape having upper and lower ends opened. The inner surface of the reflecting mirror 23 is formed as a rotating paraboloid, and white coating is applied to increase the reflectance. The reflecting mirror 23 is disposed in the front frame 22 so that the LED disposed on the lower surface of the main portion 21a faces the opening on the upper end side, and reflects light irradiated obliquely downward from the LED to the lens 24. Make it incident.

  The lens 24 is formed of a synthetic resin (for example, polycarbonate) molded product. The lens 24 is composed of a disk-shaped Fresnel lens, and is attached in the vicinity of the opening of the front frame 22 so as to close the opening of the front frame 22. 4A shows the shape of the lower surface of the lens 24, and FIG. 4B shows the shape of the upper surface of the lens 24. On the upper surface of the lens 24, a lens shape 24 b that spreads the light distribution in the direction of the arrow C and does not change the light distribution in the direction of the arrow D perpendicular to the direction of the arrow C within a plane parallel to the upper surface of the lens 24. Is formed. A concentric lens shape 24 a constituting a convex lens is formed on the lower surface of the lens 24. The lens shapes 24a and 24b as described above are formed on the surface (upper surface and lower surface) of the lens 24, and the irradiation light from the LED is distributed by the lens 24 to an elliptical region.

  The glare prevention member 25 is formed in a cylindrical shape, and two louvers 25a are arranged in parallel inside the cylindrical portion. Although the glare prevention member 25 is attached to the lower part of the front frame 22 in order to reduce glare, the glare prevention member 25 may not be provided if it is not necessary to reduce glare.

  The reflecting mirror 23 and the lens 24 are housed inside the front frame 22 with the lens 24 facing downward. The glare prevention member 25 is attached to the lower part of the front frame 22. The main body 21 is attached to the front frame 22 so as to close the opening on the upper end side of the front frame 22 with the main portion 21a, and the main body 21 and the front frame 22 are coupled by screws.

  The frame unit 3 includes a frame body 31, a plurality of (for example, three) attachment springs 32, and a pressing plate 33.

  The frame 31 is made of, for example, an aluminum die-cast product. The frame 31 includes a cylindrical tube portion 31a and a ring-shaped flange portion 31b that protrudes radially outward from the lower end portion of the tube portion 31a. The frame body 31 is attached to the ceiling material in a state where the cylindrical portion 31a is inserted into a hole formed in the ceiling material and the upper surface of the flange portion 31b is in contact with the lower surface of the ceiling material.

  The pressing plate 33 is formed in an annular shape by pressing a sheet metal, and with a predetermined gap between the upper end portion of the cylindrical portion 31a and an attachment screw 34 to the cylindrical portion 31a. It is fixed. The holding plate 33 is provided with mounting pieces 33a protruding downward from the outer peripheral edge of the pressing plate 33 at regular intervals along the outer peripheral edge. On a part of the outer peripheral edge of the pressing plate 33, a projection 33b protruding upward is formed by cutting and raising (see FIG. 5B).

  The attachment spring 32 is made of a leaf spring formed of a metal material (for example, stainless steel) having a relatively large elastic coefficient. The attachment springs 32 are attached one by one to attachment pieces 33a provided at three locations on the pressing plate 33, and the three attachment springs 32 extend radially from the center of the cylindrical portion 31a. The attachment spring 32 protrudes obliquely upward from the portion fixed to the attachment piece 33a. The attachment spring 32 is bent downward at the intermediate portion, and the tip end side projects obliquely downward. Thus, the cylindrical portion 31a is inserted into the hole formed in the ceiling material, and the mounting spring 32 contacts the upper surface of the ceiling material in a state where the upper surface of the flange portion 31b contacts the lower surface of the ceiling material. The frame unit 3 is fixed to the ceiling material.

  The support unit 4 includes an arm attachment 41 and an arm 42.

  The arm attachment 41 is formed in an annular shape by pressing a sheet metal. On the inner peripheral edge of the arm attachment 41, attachment pieces 43 are provided integrally with the arm attachment 41 so as to protrude upward from portions facing each other with the center position of the annular portion interposed therebetween. Each attachment piece 43 is formed so as to protrude in the same direction from the connection portion with the annular portion along the tangential direction at the connection portion with the annular portion. A hole (not shown) through which a mounting screw 44 for mounting the arm 42 is passed is provided on the distal end side of each mounting piece 43.

  The arm 42 is formed in a U shape by bending a narrow metal plate. A hole (not shown) through which a mounting screw 47 for attaching the front frame 22 is passed is formed in the central piece 42a of the arm 42. The attachment pieces 42b, 42b at both ends of the arm 42 are formed by bending both end sides of the central piece 42a in the same direction. The attachment pieces 42b, 42b on both sides are parallel to each other, and each attachment piece 42b is provided with a hole (not shown) through which the attachment screw 44 is passed. On the upper edge of the central piece 42a, a groove 42c is formed on the upper side of the hole through which the mounting screw 47 is passed. A protrusion 22b provided on the peripheral surface of the front frame 22 is inserted into the groove 42c, and when the lamp unit 2 rotates around the mounting screw 47, the protrusion 22b hits the end of the groove 42c. The rotation range of the unit 2 is restricted.

  The attachment piece 42 b of the arm 42 is disposed so as to overlap the inside of the attachment piece 43. The mounting screw 44 passes from the outside through the hole of the mounting piece 43 and the hole of the mounting piece 42b and is screwed into the nut 45 disposed inside the mounting piece 42b, whereby the arm 42 and the arm mounting tool 41 are coupled. Has been. A spring washer 46 is attached between the head of the attachment screw 44 and the attachment piece 43, and when the attachment screw 44 is screwed into the nut 45, the spring washer 46 is bent and elastic force is accumulated in the spring washer 46. The

  The attachment piece 43 is pressed against the attachment piece 42 b by the elastic force accumulated in the spring washer 46. The arm 42 is held at the rotation angle by the frictional force generated between the attachment piece 43 and the attachment piece 42b. When the user presses one side of the lamp unit 2 upward in order to rotate the lamp unit 2 around the mounting screw 44 (first rotation axis), the lamp unit 2 is rotated around the axial direction of the mounting screw 44. A force is applied to the lamp unit 2. When this force becomes larger than the frictional force generated between the attachment piece 43 and the attachment piece 42b, the attachment piece 42b slides along the surface of the attachment piece 43, so that the arm 42 acts on the arm attachment 41. Rotate. That is, the lamp unit 2 rotates around the mounting screw 44. When the user stops pressing the lamp unit 2 while the lamp unit 2 is rotated to a desired angle, the force for rotating the lamp unit 2 is not applied to the lamp unit 2, and the elastic force accumulated in the spring washer 46 is used. The lamp unit 2 is held at the current rotational position. The rotation range in which the lamp unit 2 rotates around the mounting screw 44 is, for example, a predetermined range when the lamp unit 2 abuts on the cylindrical portion 31a or the arm 42 abuts on the annular portion of the arm attachment 41. Limited to angular range.

  Further, the lamp unit 2 is attached to the arm 42 by screwing the attachment screw 47 passed through the hole of the central piece 42 a into the screw hole 22 a formed in the peripheral surface of the front frame 22. A spring washer 48 is attached between the head of the attachment screw 47 and the central piece 42a. When the attachment screw 47 is screwed into the screw hole 22a, the spring washer 48 is deflected and elastic force is applied to the spring washer 48. Is accumulated.

  The peripheral surface of the front frame 22 is pressed against the central piece 42 a by the elastic force accumulated in the spring washer 48, and the lamp unit 2 has a frictional force generated between the central piece 42 a and the peripheral surface of the front frame 22. Is held at the rotation angle. When the user presses one side of the lamp unit 2 upward to rotate the lamp unit 2 around the mounting screw 47 (second rotation axis), the lamp unit 2 is rotated about the axial direction of the mounting screw 47. A force is applied to the lamp unit 2. When this force becomes larger than the frictional force generated between the peripheral surface of the front frame 22 and the central piece 42a, the lamp unit 2 rotates by the front frame 22 sliding along the surface of the central piece 42a. . When the user stops pressing the lamp unit 2 while the lamp unit 2 is rotated to a desired angle, the force for rotating the lamp unit 2 is not applied to the lamp unit 2, and the elastic force accumulated in the spring washer 48 is used. The lamp unit 2 is held at the current rotational position. The rotation range in which the lamp unit 2 rotates around the mounting screw 47 is limited to a predetermined angle range by the protrusion 22b hitting the end of the groove 42c.

  The arm attachment 41 to which the lamp unit 2 is attached via the arm 42 is placed on the upper side of the cylindrical portion 31a. A pressing plate 33 is placed on the upper side of the cylindrical portion 31a so that the center thereof coincides with the cylindrical portion 31a. The pressing plate 33 is screwed to the cylindrical portion 31a with a mounting screw 34. The arm attachment 41 is held between the upper end portion of the cylindrical portion 31a and the pressing plate 33, and is rotatable with respect to the central axis of the cylindrical portion 31a (a third rotation axis perpendicular to the lower surface of the ceiling material). Yes. One attachment piece 43 is provided with a protrusion 43a protruding outward by cutting and raising, and the protrusion 43a contacts the protrusion 33b of the pressing plate 33, so that the support unit 4 is centered on the third rotation axis. The range of angles that can be rotated is limited.

  The light distribution adjustment function of the lighting fixture 1 will be described with reference to FIGS. In the lighting fixture 1 of this embodiment, when illuminating rectangular objects (tables, beds, etc.) having different vertical and horizontal lengths, the brightness necessary for work can be ensured up to the end of the object to be irradiated. The horizontal illuminance distribution is elliptical. Such a lighting apparatus is suitable for an application of illuminating the upper surface of a bed in a hospital or a nursing facility, for example. Fig.8 (a) shows the light distribution of the lighting fixture 1, and the light distribution area | region A1 of the lighting fixture 1 is set to the ellipse shape. In this luminaire 1, the axial direction (second rotational axis) of the mounting screw 47 is parallel to the long axis direction of the light distribution area A1, and the axial direction (first rotational axis) of the mounting screw 44 is short of the light distribution area A1. Parallel to the axial direction. Therefore, when the lamp unit 2 rotates around the axial direction of the mounting screw 44, the light distribution area A1 slides along the long axis direction. When the lamp unit 2 rotates about the axial direction of the mounting screw 47, the light distribution area A1 slides along the short axis direction. Further, when the lamp unit 2 rotates around the third rotation axis orthogonal to the ceiling surface, the light distribution area A1 also rotates around the third rotation axis.

  FIGS. 5A to 5C show a state in which the luminaire 1 illuminates directly below. As shown in FIG. 5A, the lamp unit 2 has a central axis CL1 of the lamp unit 2 parallel to the vertical direction. Rotating to position. FIG. 8A shows the light distribution when the luminaire 1 illuminates directly below. The major axis direction of the elliptical light distribution region A1 (region where constant brightness is obtained) coincides with the longitudinal direction of the bed 100, and the minor axis direction of the light distribution region A1 coincides with the lateral direction of the bed 100. In addition, the bed 100 is arranged. The bed 100 includes most of the areas except for the four corners in the light distribution area A1. Since the four corners of the bed 100 are out of the light distribution area A1, it is slightly darker than the area included in the light distribution area A1, but the distance out of the light distribution area A1 is very small and is necessary for the work. Brightness can be ensured.

  6 (a) to 6 (d) show that the lamp unit 2 rotates in the clockwise direction in FIG. 6 (c) with the mounting screw 44 as the rotation axis and is centered in the rotation direction with the mounting screw 47 as the rotation axis. The state located in the position (the same position as the state shown in FIG. 5) is shown. In this state, as shown in FIG. 8B, the long axis of the light distribution area A1 from the area (see FIG. 8A) when the light distribution area A1 of the luminaire 1 is illuminating directly below. It is sliding along the direction. When the position of the bed 100 is slid along the longitudinal direction of the bed 100, that is, the longitudinal direction of the light distribution area A1, the lamp unit 2 is rotated about the mounting screw 44 as a rotation axis, thereby the light distribution area A1. Can be made to follow the position of the bed 100.

  7 (a) to 7 (d), the lamp unit 2 rotates clockwise in FIG. 7 (c) with the mounting screw 44 as the rotation axis, and the mounting screw 47 as the rotation axis in FIG. 7 (a). The state rotated clockwise is shown. Since the lamp unit 2 rotates around the first rotation axis (center axis of the mounting screw 44) and the second rotation axis (center axis of the mounting screw 47), as shown in FIG. 8 (c). The light distribution area A1 slides from the position in FIG. 8B along the short axis direction of the light distribution area A1. When the position of the bed 100 is slid along the short direction of the bed 100 from the position shown in FIG. 8B, the lamp unit 2 is rotated about the mounting screw 47 as a rotation axis, thereby distributing the light distribution area A1. Can be made to follow the position of the bed 100.

  By the way, the lamp unit 2 is rotatable about a rotation axis orthogonal to the ceiling surface, and is rotatable about one rotation axis (for example, the axial direction of the mounting screw 44) parallel to the ceiling surface. In this case, the light distribution area A1 is adjusted as follows. As shown in FIG. 8D, when the bed 100 slides from the position directly below the lighting fixture 1 along the longitudinal direction and the short direction of the bed 100, the movement of the bed 100 in the light distribution area A1. Therefore, it is necessary to adjust the direction of the lamp unit 2 so as to follow. In this case, as shown in FIG. 8D, the lamp unit 2 is rotated around a rotation axis parallel to the ceiling surface and is rotated around a rotation axis CL2 orthogonal to the ceiling surface. As a result, the light distribution area A1 slides along the long axis direction and is rotated around the central axis CL2, so that the upper surface of the bed 100 can be illuminated, but the elliptical distribution is provided. The major axis direction of the light region A1 crosses the longitudinal direction of the bed 100 obliquely. Therefore, of the four corners of the bed 100, the two corners in the long axis direction of the light distribution area A1 are illuminated with sufficient brightness, but the two corners in the short axis direction of the light distribution area A1 There is a possibility that the required illuminance cannot be secured due to insufficient light.

  On the other hand, in the lighting fixture 1 of this embodiment, the lamp unit 2 includes a first rotating shaft (axial direction of the mounting screw 44) parallel to the ceiling surface and a second rotating shaft (perpendicular to the first rotating shaft). Each of the mounting screws 47 is axially rotatable. Therefore, by rotating the lamp unit 2 around the axial direction of the mounting screw 44, the lamp unit 2 is arranged along the direction parallel to the ceiling surface and orthogonal to the axial direction of the mounting screw 44 (the left-right direction in FIG. 8C). The light area A1 can be slid. Further, by rotating the lamp unit 2 around the axial direction of the mounting screw 47, the lamp unit 2 is arranged along the direction parallel to the ceiling surface and perpendicular to the axial direction of the mounting screw 47 (vertical direction in FIG. 8C). The light area A1 can be slid. That is, the light distribution area A1 of the luminaire 1 can be slid in the left and right directions and the vertical direction in FIG. Thereby, the long axis direction of the elliptical light distribution region A1 coincides with the longitudinal direction of the bed 100, and the short axis direction of the light distribution region A1 coincides with the short direction of the bed 100. The position is adjusted. Therefore, it is possible to illuminate the upper surface of the bed 100 in the same manner as when the bed 100 is directly under the luminaire 1, irradiate sufficient light on the four corners of the bed 100, and work is also necessary at the four corners of the bed 100 High brightness can be secured.

  As described above, the lighting fixture 1 of the present embodiment includes the lamp unit 2 (lamp) that holds the light source, and the frame unit 3 (frame portion) that is fixed around the mounting hole provided on the ceiling surface. And a support unit 4 (support part) that supports the lamp unit 2 and is attached to the frame unit 3. The support unit 4 is attached to the arm attachment 41 so as to be rotatable about an arm attachment 41 (attachment member) attached to the frame unit 3 and a first rotation axis (center axis of the attachment screw 44) parallel to the ceiling surface. Arm 42 is provided. The lamp unit 2 is attached to the arm 42 so as to be rotatable about a second rotation axis (center axis of the mounting screw 47) orthogonal to the first rotation axis.

  Thereby, by rotating the arm 42 around the first rotation axis with respect to the arm fixture 41, the light distribution region is slid along the direction parallel to the ceiling surface and orthogonal to the first rotation axis. Can do. Further, by rotating the lamp unit 2 around the second rotation axis with respect to the arm 42, the light distribution region can be slid along the direction parallel to the ceiling surface and orthogonal to the second rotation axis. . Therefore, since the light distribution area can be slid in two directions orthogonal to each other in a plane parallel to the ceiling surface, the light distribution can be adjusted more finely. Although the first rotation axis is parallel to the ceiling surface, it may be slightly tilted due to errors in assembly and construction, and the ceiling is within an angle range that can be considered to be almost parallel to the ceiling surface with human eyes. It may intersect with the surface.

  In addition, a pressing plate 33 (pressing member) that is attached to the frame unit 3 and holds the arm mounting tool 41 with the frame unit 3 is provided, and the arm mounting tool 41 has a third rotating shaft (perpendicular to the ceiling surface). It is also preferable that the cylinder unit 31 is held between the frame unit 3 and the pressing plate 33 so as to be rotatable about the central axis CL2) of the cylindrical portion 31a. By rotating the lamp unit 2 around the third rotation axis, the light distribution area A1 can be rotated around the third rotation axis orthogonal to the ceiling surface, and thus the light distribution area A1 can be adjusted more finely. Can do. Although the third rotation axis is orthogonal to the ceiling surface, it may be slightly inclined due to errors in assembly and construction, and the ceiling is within an angle range that can be considered to be substantially orthogonal to the ceiling surface when viewed by human eyes. It may intersect with the surface.

  It is also preferable that the light distribution of the light emitted from the LED is an elliptical light distribution in which the direction parallel to the second rotation axis (the central axis of the mounting screw 47) is the major axis direction. Accordingly, the elliptical light distribution region A1 can be slid along the major axis direction and the minor axis direction of the ellipse within a plane parallel to the ceiling surface.

  It should be noted that a wide variety of different embodiments can be configured without departing from the spirit and scope of the present invention, and the present invention is not limited to a specific embodiment.

1 Lighting equipment 2 Lamp unit (lamp)
3 Frame unit (frame part)
4 Support unit (support part)
31 Frame 31a Cylinder part 31b Eaves part 33 Holding plate (pressing member)
41 Arm attachment (attachment member)
42 Arm 44 Mounting screw (first rotating shaft)
47 Mounting screw (second rotary shaft)
CL2 center axis (third rotation axis)

Claims (3)

A lamp that holds the light source;
A frame portion fixed around a mounting hole provided on the ceiling surface;
A support portion that supports the lamp and is attached to the frame portion;
The support portion includes an attachment member attached to the frame portion, and an arm attached to the attachment member so as to be rotatable around a first rotation axis parallel to the ceiling surface.
The arm includes a center piece and projecting pieces projecting in the same direction from both sides of the center piece, and the projecting piece is provided with the first rotation shaft, and the center piece has the first rotation. and the second rotating shaft is provided perpendicular to the axis, the arm, lighting equipment, characterized in that rotatably said lamp is mounted about said second rotation axis. A pressing member attached to the frame portion and holding the mounting member between the frame portion,
The lighting device according to claim 1, wherein the mounting member is held between the frame portion and the pressing member in a state of being rotatable about a third rotation axis orthogonal to the ceiling surface.   The light distribution of the irradiation light from the light source is an elliptical light distribution whose major axis is a direction parallel to the second rotation axis. Lighting fixtures.

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