JP2018088428A - Light source unit and light fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source unit which enables an easy change of light control while performing stable light control with a smaller number of components, and a light fitting.SOLUTION: A light source unit according to the invention includes: a light source part; a holding part to which the light source part is attached; and a light distribution control member. The light distribution control member includes: a light control member covering the light source part, being attached to the holding part, and having a light transmission part; a light diffusion part being provided between the light transmission part and the light source part and forming a curved surface; and surface contact parts, each of which integrates the light control member with the light diffusion part at an area located closer to the holding part side than the light diffusion part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a light source unit and a lighting fixture.

  Direct lighting fixtures that are attached to the ceiling or the like are generally fixtures having a relatively wide light distribution, but there are those that control light distribution such as a condensing type or a glare cut type depending on the use environment. In light fixtures using straight tube fluorescent lamps, light distribution control was performed using reflective members, louvers, etc., but in recent years, the shape of lighting fixtures has diversified with the use of LEDs as light sources, and cover members have been used. Some devices perform light distribution control such as diffusion and condensing.

  For example, in a lighting fixture according to Japanese Patent Application Laid-Open No. 2013-206849, a groove is provided inside a substantially semicircular arc-shaped cover, and a light distribution control member such as an optical sheet is curved in a groove provided in the cover. There is something that can be attached. This lighting fixture is provided with a cover and an optical sheet separately, so that the light distribution control can be changed by changing the optical sheet.

  Moreover, according to JP2013-201012A, although it is not a light control member, in a lighting fixture using an LED having a cover as a light source, the cover has a groove portion for attaching a substrate having the LED by sliding. Since the cover holds the substrate, a member for attaching the substrate such as a screw / adhesive member can be reduced.

  Further, according to Japanese Patent Application Laid-Open No. 2013-127922, there is a lighting apparatus equipped with an LED that uses a light emitting device that performs light distribution control with a transmissive cover lens on the LED light emitting unit. In this lighting fixture, the light distribution control can be changed by changing the transmissive cover / lens.

JP 2013-206849 A JP2013-201012A JP2013-127922A

  However, the cover according to JP2013-206849A holds the optical sheet by curving it. For this reason, stress is always applied to the optical sheet, and material deterioration such as cracking may occur. Also, some optical sheets perform light distribution control by surface processing such as protrusions, and there is a problem that the surface processing is deformed by bending and the light distribution control as designed cannot be performed.

  Moreover, according to the technique concerning Unexamined-Japanese-Patent No. 2013-201012, the board | substrate is inserted in the groove part of the cover by the slide. When the cover and substrate become long, a work space is required for insertion, and the cover is made of resin, and many are twisted, making it difficult to insert. There is a problem of becoming. This problem is also a concern when the optical sheet is attached by sliding it into the cover groove as in the case of the substrate.

  In the light emitting device according to Japanese Patent Laid-Open No. 2013-127922, a fixing member for fixing each of the transmission cover and the lens is required. For this reason, there exists a problem that the number of parts for comprising a light-emitting device increases.

  The present invention has been made to solve the above-described problems, and has an object to provide a light source unit and a lighting fixture that can easily change light control while performing stable light control with a small number of parts. To do.

  A light source unit according to the present invention includes a light source unit, a holding unit to which the light source unit is attached, and a light distribution control member. The light distribution control member covers the light source unit and is attached to the holding unit. A light control member having a light transmission part, a light diffusion part provided between the light transmission part and the light source part, forming a curved surface, and the light control on the holding part side of the light diffusion part A current portion for integrating the member and the light diffusing portion.

  A light source unit according to the present invention includes a light source unit, a holding unit to which the light source unit is attached, and a light distribution control member. The light distribution control member covers the light source unit and has a light transmission unit. A control member, a light diffusing portion provided between the light transmission portion and the light source portion, forming a curved surface, a contact portion extending along a surface to which the light source portion of the holding portion is attached, and the holding And a hooking part that hooks to a part opposite to the light source part with respect to the surface to which the light source part is attached.

  According to the present invention, a plurality of easily detachable members are fitted to each other so as to realize and configure desired light control. Therefore, a light source that can be easily changed while performing stable light control. Units and lighting fixtures are provided with a small number of parts.

It is a perspective view of the lighting fixture concerning embodiment of this invention. It is a disassembled perspective view of the lighting fixture concerning embodiment. It is sectional drawing of the light source unit and light distribution control member concerning embodiment. It is sectional drawing of the light emission part concerning embodiment. It is sectional drawing of the 1st light control member concerning embodiment. It is sectional drawing of the 2nd light control member concerning embodiment. It is an assembly process figure of the light distribution control member concerning an embodiment. It is an assembly process figure of the light distribution control member concerning an embodiment. It is an assembly process figure of the light distribution control member concerning an embodiment. It is an assembly process figure of the light distribution control member concerning an embodiment. It is the figure which showed the light distribution performance of the light source unit concerning embodiment.

  The lighting fixture 1 concerning this Embodiment can be attached and used for a ceiling etc. However, the present invention is not limited to a ceiling-mounted lighting fixture, and may be applied to a lighting fixture of a type attached to a wall or a floor, or may be applied to a hanging lighting fixture. In the following description, in order to facilitate understanding of the shape and structure, for convenience, the light irradiation direction of the luminaire 1 is referred to as “lower side” and the direction opposite to the light irradiation direction is referred to as “upper side”. The horizontal axis direction that intersects with is also referred to as “horizontal”.

(lighting equipment)
FIG. 1 is a perspective view of a lighting fixture 1 according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. The luminaire 1 as a whole has an elongated substantially rectangular block-shaped outer structure. The lighting fixture 1 includes a light source unit 100 and a fixture main body 1000. The appliance main body 1000 is attached to a mounted part such as a ceiling and has a lower surface that is open and incorporates a lighting device that generates DC power from a commercial power source. The light source unit 100 is attached so as to close the opening of the instrument main body 1000, incorporates an LED 111, and the LED 111 is lit by power supplied from a commercial power source. Both the instrument main body 1000 and the light source unit 100 have an elongated, substantially rectangular block shape. The light source unit 100 includes an LED 111 and is lit with electric power supplied from a commercial power source, and a light distribution control member 120 that is disposed on the front side of the light emitting unit 110 on the irradiation side and controls light emitted from the light emitting unit 110. It has.

(Light source unit and light distribution control member)
FIG. 3 is a cross-sectional view of the light source unit 100 and the light distribution control member 120 according to the embodiment. FIG. 4 is a cross-sectional view of the light emitting unit 110 according to the embodiment. The light emitting unit 110 includes a plurality of LEDs 111, an LED substrate 112 on which the plurality of LEDs 111 are mounted, and a substrate holding unit 113 that holds the LED substrate 112. The plurality of LEDs 111 are arranged substantially uniformly in a straight line on the mounting surface of the LED substrate 112. A lighting device (not shown) included in the lighting fixture 1 generates a direct current from a commercial power source and lights a plurality of LEDs 111. In the present embodiment, the LEDs 111 are described as being arranged substantially evenly in a straight line, but the present invention is not limited to this. Depending on the shape of the light source unit 100, the light source unit 100 may not be arranged in a straight line, may be arranged at unequal intervals, and may be arranged to form a plurality of rows. An organic EL element may be used instead of the LED.

  The substrate holding portion 113 has a substantially U-shaped cross section, and is formed of a substrate contact surface 113a and a holding vertical portion 113b. The substrate contact surface 113a contacts the back surface of the LED substrate 112 opposite to the LED 111 mounting surface. The holding vertical portion 113b is a portion extending from the both ends in the longitudinal direction of the substrate contact surface 113a to the back surface side of the LED substrate 112 substantially perpendicularly.

  The light distribution control member 120 is disposed on the front surface of the light emitting unit 110 and the first light control member 130, which is a light control member that is partly open and forms a substantially outline of the light distribution control member 120. The second light control member 140 fits in the opening 130 and the side plate 150 bonded to the end face. First, the light source unit 100 will be described with reference to FIG. The light emitted from the LED 111 is diffused by the second light control member 140 of the light distribution control member 120 and then reaches the first light control member 130.

(First light control member)
FIG. 5 is a cross-sectional view of the first light control member 130 according to the embodiment. The shape of each part is demonstrated by sectional view using sectional drawing of FIG. The first light control member 130 includes a light transmission part 131, a first reflection part 132, a side part 133, a horizontal part 134, a light source contact part 135, and a first fitting part 136. The first light control member 130 is formed in a symmetric shape with a virtual line extending in the vertical direction from the horizontal central portion of the light transmitting portion 131 as a central axis in the cross-sectional view of FIG. The light transmission part 131 includes a front surface 131a and a back surface 131b, and transmits light from the LED 111. The light transmission part 131 is disposed on the irradiation direction side of the light emitting part 110 and has a substantially planar shape. The first reflecting portion 132 reflects light at a surface that protrudes from the end of the light transmitting portion 131 toward the back surface 131b and faces the back surface 131b. The first reflecting portion 132 protrudes in the upper inner diagonal direction from both ends of the light transmitting portion 131 toward the center of the light transmitting portion 131. The side surface portion 133 extends obliquely from the both ends of the light transmission portion 131 so as to be away from the center of the light transmission portion 131. In the present embodiment, the side surface portion 133 extends sideward by extending substantially obliquely in the shape of a circular arc when viewed in cross section. The part 133 has a curved surface that protrudes outward. The side portion 133 protrudes from the end of the light transmission portion 131 to the back surface 131b side outside the first reflection portion 132. The side part 133 can be reversibly opened outward so as to be away from the back surface 131b. The horizontal portion 134 protrudes inward in the horizontal direction from the end portion of the side surface portion 133. The light source contact part 135 protrudes from the horizontal part 134 to the upper side (that is, the light emitting part 110 side). The first fitting portion 136 protrudes inside the side surface portion 133 so as to extend substantially on the extension of the horizontal portion 134.

  In the present embodiment, the entire first light control member 130 is formed of the same transparent material. Even if it is a transparent material, light can be diffused by providing unevenness on the surface of the first light control member 130.

  As shown in FIG. 5, the first reflecting part 132, the horizontal part 134, and the first fitting part 136 extend from both sides of the first light control member 130 to the center of the first light control member 130, respectively. Is formed. One set of first reflecting portions 132 facing each other, one set of horizontal portions 134 facing each other, and one set of first fitting portions 136 facing each other are respectively inside the first light control member 130 (that is, emitting light). An opening is formed on the portion 110 side. The side surface portion 133 can be opened by elastic deformation outward in the horizontal direction with the joint peripheral portion with the light transmission portion 131 as a substantially center, and the first light control member 130 and the second light control member are opened by the side surface portion 133 being opened. 140 fits are possible. The light source contact part 135 is in contact with the holding vertical part 113 b of the light emitting part 110 and holds the light emitting part 110. A hook portion 135 a having a substantially semicircular arc shape is formed at the tip of the light source contact portion 135. The light source contact portion 135 and the hooking portion 135a may be changed according to the shape of the light emitting portion 110. The light transmission unit 131 controls the light distribution of light incident from the second light control member 140 by refraction. The first reflector 132 controls the light distribution of the light incident from the second light control member 140 by total reflection. In the present embodiment, irregularities are provided on the inner surface 132 a of the first reflecting portion 132. In the drawing, the unevenness of the inner surface 132a is schematically illustrated, and the actual form is not limited to the illustrated step, and may be a stepped unevenness having a plurality of steps of equal height, and other unevennesses. But you can. The present invention is not limited to this, and the inner surface 132a may be a flat surface without unevenness.

(Second light control member)
FIG. 6 is a cross-sectional view of the second light control member 140 according to the embodiment. The shape of each part is demonstrated by sectional view using sectional drawing of FIG. The second light control member 140 includes a light diffusing portion 141, a second reflecting portion 142, a current surface portion 143, and a second fitting portion 144. The second light control member 140 is formed in a symmetric shape with a virtual line extending in the vertical direction from the horizontal central portion of the light diffusing portion 141 as the central axis in the cross-sectional view of FIG. The light diffusing unit 141 is disposed in front of the light emitting unit 110 and diffuses the light of the LED 111. The surface of the light diffusing unit 141 in the present embodiment is a slightly rounded curved surface, but is not limited to this and may be a flat surface. The second reflecting portion 142 is provided between the light diffusing portion 141 and the second fitting portion 144, and the light diffusing portion 141 forms a step that protrudes toward the first light control member 130. 141 and the second fitting portion 144 are connected. The second reflecting part 142 protrudes obliquely from the both ends of the light diffusing part 141 at the upper side. The surface portion 143 projects horizontally from the tip of the second reflecting portion 142 and extends outward in parallel with the LED substrate 112. The second fitting portion 144 is integrated with the light diffusing portion 141 via the abutment portion 143 and extends in the plane direction of the light diffusing portion 141 from the end side of the light diffusing portion 141.

  The second light control member 140 is integrally formed by two-color molding. The light diffusion portion 141 is made of a diffuse transmission material, and is milky white, for example. The 2nd reflection part 142 is comprised with the light-impermeable highly reflective member, for example, is white.

  The second fitting portion 144 is formed at the tip of the abutting portion 143 and has a substantially “U” shape. The light diffusing unit 141 diffuses the light irradiated by the LED 111 and irradiates the first light control member 130. The 2nd reflection part 142 reflects the irradiation light of LED111 in the surface. It is preferable that at least the surface of the second reflecting portion 142 that receives the light of the LED 111 is formed of a reflective material having a reflectance of 90% or more and a large amount of diffusing components. For example, the second reflective portion 142 may be formed using a highly reflective polycarbonate material.

  The second fitting portion 144 has a substantially “U” shape and is formed so that the opening of the “U” shape faces in the horizontal outward direction. The upper fitting piece 145a located on the upper side of the opening is formed longer than the lower fitting piece 145b located on the lower side of the opening. An upper fitting piece 145a and a lower fitting piece 145b having different lengths are provided at the tip of the second fitting portion 144. The lower fitting piece 145b is provided closer to the first light control member 130 than the upper fitting piece 145a and is shorter than the upper fitting piece 145a.

  In the light distribution control member 120, the first fitting portion 136 and the second fitting portion 144 are fitted, and the first and second light control members 130 and 140 are integrated with the light diffusion portion 141 spread. It is. The second light control member 140 is integrated with the first light control member 130 so that the light transmission part 131 and the light diffusion part 141 overlap each other. When the side surface portion 133 is returned to the original position, the first fitting portion 136 and the second fitting portion 144 are fitted, and the tips of the first fitting portion 136 are the upper fitting piece 145a and the lower fitting piece 145b. Fit in between. At this time, the light diffusing unit 141 is not expanded but is expanded, that is, the original shape shown in FIG. 6 is maintained. Thereby, it can suppress that a stress is applied to the light-diffusion part 141. FIG. Further, it is preferable that the entire second light control member 140 is also maintained in a state of being expanded in the plane direction without being curved. By suppressing the stress of the component parts in this way, the possibility of material deterioration such as cracking can be reduced. In addition, since the light diffusing unit 141 is not curved, even when the surface of the light diffusing unit 141 is subjected to surface processing such as a protrusion, the surface processing is deformed and the designed light distribution control cannot be performed. Preferably, when the first fitting portion 136 and the second fitting portion 144 are fitted, the front end of the first fitting portion 136 and the bottom of the U-shape of the second fitting portion 144 abut on each other. Alternatively, the design may be such that a slight clearance (clearance) is provided between the tip of the first fitting portion 136 and the bottom of the U-shape of the second fitting portion 144. This is because an unnecessary force is not applied to the second light control member 140 and it is possible to more reliably suppress stress on the light diffusion portion 141.

  The first fitting portion 136 and the second fitting portion 144 can be separated by opening the side surface portion 133 with the end portion of the light transmitting portion 131 as a fulcrum. It is preferable that the first fitting portion 136 and the second fitting portion 144 can be detached while the side surface portion 133 is elastically deformed when the side surface portion 133 is opened outward. Since the first and second fitting portions 136 and 144 can be easily detached by reversibly opening the side surface portion 133, the combination of the first and second light control members 130 and 140 can be easily changed and the subsequent Exchange is also easy and light distribution control can be easily changed.

  Since the first light control member 130 and the second light control member 140 are integrated by fitting, the light distribution control member 120 can be easily attached and detached. The second light control member 140 having characteristics can be easily exchanged. Specifically, by using the second light control member 140 having a different degree of dispersion, the light distribution control characteristic can be easily changed with respect to the light emitted from the light emitting unit 110.

  The light source unit 100 according to the present embodiment is arranged so that the horizontal center portion of the light transmission portion 131, the horizontal center portion of the light diffusion portion 141, and the center portion of the LED 111 are substantially coaxial. In the present embodiment, the first light control member 130 includes a plate-like first fitting portion 136 formed in the horizontal direction, and the second light control member 140 has a substantially “U” -shaped second fitting. Although the shape including the joint portion 144 has been described, the reverse, that is, the first light control member 130 may be provided with the second fitting portion 144. When providing the 2nd fitting part 144 in the 1st light control member 130, the upper fitting piece 145a is formed shorter than the lower fitting piece 145b contrary to what was shown in FIG. Further, the shape is not limited to a “U” shape, and may be a “C” shape or a “U” shape, and the shape is not particularly limited as long as an opening for receiving the first fitting portion 136 is provided.

(Assembly process)
7 to 10 are assembly process diagrams of the light distribution control member 120 in the present embodiment. In FIG. 7, the first light control member 130 and the second light control member 140 are in separate states. FIG. 8 shows a state where one of the second fitting portions 144 of the second light control member 140 is inserted into the first fitting portion 136 of the first light control member 130. FIG. 9 shows a state in which the side surface portion 133 of the first light control member 130 is moved. FIG. 10 shows a state in which the second light control member 140 is fitted to the first light control member 130.

  The procedure will be described. First, as shown in FIG. 8, one side of the second fitting portion 144 is placed on the first fitting portion 136 of the first light control member 130 with the second light control member 140 inclined. Insert in the direction of arrow A. Next, as shown in FIG. 9, of the side surface portions 133 of the first light control member 130, the side surface portion 133 into which the second fitting portion 144 is not inserted is connected to the side surface portion 133 and the light transmission portion 131. The joint 133a is opened in the direction of arrow B with the fulcrum as a fulcrum. At this time, the side part 133 should just open at least the length of the lower fitting piece 145b. By opening only the length of the lower fitting piece 145b, the second light control member 140 moves downward (arrow C) with one second fitting portion 144 fitted into the first fitting portion 136 as a fulcrum. Move and fit. As the second light control member 140 rotates downward, the first fitting portion 136 and the upper fitting piece 145a come into contact with each other, and the first fitting portion 136 can be inserted into the second fitting portion 144. . Next, the first fitting portion 136 is inserted into the second fitting portion 144 by returning the side surface portion 133 that has been opened outward. In this way, the second light control member 140 is fitted with the first light control member 130, and the light distribution control member 120 is assembled.

  As for the 2nd fitting part 144, the upper fitting piece 145a is formed longer than the lower fitting piece 145b. Accordingly, the first fitting portion 136 and the second fitting portion 144 can be detached even when the movable range of the side surface portion 133 is small, and when the first fitting portion 136 is inserted into the second fitting portion 144. There is an effect that the upper fitting piece 145a performs a guide function.

(optical properties)
FIG. 11 is a diagram illustrating the light distribution performance of the light source unit 100 according to the embodiment. FIG. 11 is a light distribution diagram comparing the light distributions of the second light control members 140 having different degrees of dispersion. In addition, a condensing specification is demonstrated as an example of the change of light distribution by the change of the dispersion degree of the 2nd light control member 140. FIG. In the second light control member 140, the light emission distribution of the light diffusing unit 141 can be adjusted by changing the degree of dispersion of the light diffusing unit 141. As a result, the light distribution of the light distribution control member 120 can be changed. In FIG. 11, the second light control member A1401 has a dispersion degree of the light diffusion part 141 of 60%, the second light control member B1402 has a dispersion degree of the light diffusion part 141 of 47%, The light control member C1403 has a dispersion degree of the light diffusion portion 141 of 24%. Here, the dispersion angle is defined as the light reception angle θ at which the transmitted light amount is 50% when the transmitted light amount at the light reception angle of 0 ° is 100%. The central light intensity of the second light control member A1401, the second light control member B1402, and the second light control member C1403 is larger in the second light control member B1402 than in the second light control member A1401, and the second light control member B1402 is used. The light distribution control is performed such that the second light control member C1403 is larger than the second light control member C1403. That is, the light distribution control member 120 changes the center of the light emitted from the light source unit 100 by changing the second light control member 140 provided in advance to the second light control member A1401 having a higher degree of dispersion. Light control can be performed so that the light intensity becomes small.

  The numerical values used in the present embodiment are merely examples and do not limit the present invention, and the values of the degree of dispersion and the central light flux may be proportional. Further, not only the degree of dispersion but also the degree of transparency may be changed. Moreover, although the light collection specification has been described in the present embodiment, light distribution control other than the light collection specification may be used. In the present embodiment, as one of the preferable modes, a plurality of different types of light control functions of the light transmitting portion 131, the first reflecting portion 132, the light diffusing portion 141, and the second reflecting portion 142 are integrated. A light distribution control member 120 is provided. Thus, since two components are integrated by fitting, multiple types of light control can be performed with few components.

  The light distribution control member 120 and the first and second light control members 130 and 140 constituting the light distribution control member 120 have shapes obtained by continuously extending the cross-sectional shapes shown in FIGS. However, the first and second light control members 130 and 140 are not necessarily required to have a uniform cross-section in the length direction, and portions having different cross-sectional shapes are partially provided in the length direction. Also good. The first and second light control members 130 and 140 may be manufactured by integrally molding a synthetic resin suitable for each with a mold. If necessary, transmit light to a light control unit (in this embodiment, a light transmission unit 131, a first reflection unit 132, a light diffusion unit 141, and a second reflection unit 142), which is a part having a light control function. In order to obtain desired optical characteristics such as reflection, diffusion and the like, it may be partially molded with a synthetic resin having suitable optical characteristics, coated, or subjected to surface treatment such as unevenness. In the present embodiment, the second light control member 140 has a symmetrical shape in the cross-sectional view of FIG. 5 with the vertical direction from the horizontal central portion of the light transmitting portion 131 as the central axis, and from the horizontal central portion of the light diffusing portion 141. Although the second light control member 140 has a symmetrical shape in the cross-sectional view of FIG. 6 with the vertical direction as the central axis, the present invention is not limited to this and may not be a left-right symmetrical shape.

DESCRIPTION OF SYMBOLS 1 Lighting fixture, 100 Light source unit, 110 Light emission part, 111 LED, 112 LED board, 113 Board | substrate holding part, 113a Board | substrate contact surface, 113b Holding | maintenance vertical part, 120 Light distribution control member, 130 1st light control member, 131 light Transmission part, 131a front surface, 131b back surface, 132 first reflection part, 133 side surface part, 134 horizontal part, 135 light source contact part, 135a hooking part, 136 first fitting part, 140 second light control member, 141 light diffusion Part, 142 second reflecting part, 143 current part, 144 second fitting part, 145a upper fitting piece, 145b lower fitting piece, 150 side plate, 1000 instrument body part

Claims (6)

A light source unit;
A holding part to which the light source part is attached;
A light distribution control member;
With
The light distribution control member is
A light control member that covers the light source part, is attached to the holding part, and has a light transmission part;
A light diffusing unit that is provided between the light transmitting unit and the light source unit and forms a curved surface;
On the side of the holding unit with respect to the light diffusing unit, the current unit for integrating the light control member and the light diffusing unit,
A light source unit comprising: A light source unit;
A holding part to which the light source part is attached;
A light distribution control member;
With
The light distribution control member is
A light control member that covers the light source part and has a light transmission part;
A light diffusing unit that is provided between the light transmitting unit and the light source unit and forms a curved surface;
An abutting portion extending along a surface to which the light source portion of the holding portion is attached;
Of the holding part, a hook part hooked to a part opposite to the light source part with respect to the surface to which the light source part is attached,
A light source unit comprising: The holding part is
A contact portion to which the light source unit is attached;
From both ends of the contact portion, a side portion extending on the opposite side to the light source portion with respect to the contact portion,
The light source unit according to claim 1, further comprising:   4. The light source unit according to claim 1, further comprising a pair of reflecting portions provided so that a distance is widened from the light diffusing portion toward the light transmitting portion. 5.   The light source unit according to any one of claims 1 to 4, wherein the light control member includes a horizontal portion extending toward the abutting portion. An instrument body with a built-in lighting device;
The light source unit according to any one of claims 1 to 5, wherein the light source unit is attached to the instrument body and is lit by the lighting device.
With
The light source unit is attached so that the light control member closes an opening of the fixture body.

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