JP2011192398A - Lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture with a large change of illumination effects accompanying rise and fall of a lamp tool. <P>SOLUTION: The lighting fixture is provided with a lamp tool 1 holding an electric light source LT1 and hung and supported by at least one wire 2 from the ceiling CE, and a reel device 4 for lifting the lamp tool 1 by winding and reeling out each wire 2. When the lamp tool 1 is at the lowest limit position in a movable range as shown in Fig.1(a), an irradiation direction A1 where light of the light source LT1 is irradiated is to be upward, and therefore, an effect of indirect illumination is obtained that a floor face or the like is illuminated by reflection light with light of the light source LT1 reflected at the ceiling CE. Further, when the lamp tool 1 is at the topmost position in the movable range as shown in Fig.1(b), a direction of the lamp tool 1 is reversed up and down to make the irradiation direction A1 downward, and therefore, an effect of direct illumination is obtained that the floor face or the like is illuminated by direct light irradiated from the light source LT1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lighting fixture.

  Conventionally, in a so-called pendant type lighting fixture in which a lamp holding a light source is supported by being suspended from a ceiling by a wire, the lamp is wound by winding and feeding the above-mentioned wire with a reel device fixed to the ceiling, for example. The thing which can be raised / lowered is provided (for example, refer patent document 1).

  According to the lighting fixture as described above, for example, when the lamp illuminates the light of the light source downward, uniform illuminance can be obtained over a wide range in the room when the lamp is raised to the vicinity of the ceiling. In a state where the lamp is lowered, high illuminance can be obtained in a narrow range such as a desk surface directly under the lamp.

JP 2000-11743 A

  However, in the conventional lighting fixture, the change of the lighting effect accompanying raising / lowering of a lamp was scarce.

  This invention is made | formed in view of the said reason, The objective is to provide the lighting fixture with the big change of the lighting effect accompanying raising / lowering of a lamp.

  According to a first aspect of the present invention, there is provided a lighting device that turns on an electrical light source, a lamp that is fixedly supported by the light source and suspended from a ceiling by at least one wire, and the lamp that is wound by winding each wire. A reel device that raises and lowers the lamp by feeding out the wires, and a light distribution changing unit that changes an irradiation direction in which light from the light source is irradiated as the lamp is raised and lowered. .

  In a second aspect based on the first aspect, the light distribution changing means sets the irradiation direction downward when at least the lamp is at the upper limit position of the movable range, and at least the lamp is at the lower limit position of the movable range. In a certain state, the irradiation direction is an upward direction.

  In a third aspect based on the first aspect, the light distribution changing means sets the irradiation direction downward when at least the lamp is at the lower limit position of the movable range, and at least the lamp is at the upper limit position of the movable range. In a certain state, the irradiation direction is an upward direction.

  According to a fourth invention, in the second invention, an auxiliary light source that emits light downward, and an auxiliary light source lighting device that lights the auxiliary light source at least during a period in which the irradiation direction is an upward direction. And

  According to a fifth aspect, in the third aspect, the lighting device turns off the light source in a state where at least the lamp is at the upper limit position of the movable range.

  According to the present invention, since the light distribution changing means for changing the irradiation direction in which the light of the light source is irradiated as the lamp is raised and lowered is provided, the change in the illumination effect accompanying the raising and lowering of the lamp as compared with the case where the irradiation direction does not change. Becomes larger.

(A) (b) is explanatory drawing which respectively shows embodiment of this invention, (a) shows the state which has a lamp in a lower limit position, (b) shows the state which has a lamp in an upper limit position. (A)-(d) is explanatory drawing which respectively shows operation | movement same as the above, (a) shows the state which has a lamp in a lower limit position, (b) has the state where the convex part for reversal was introduced into the hole for reversal (C) shows a state where each wire is wound up more than the state of (b), and (d) shows a state where the lamp is in the upper limit position. It is explanatory drawing which shows the example of a change same as the above. (A) (b) is explanatory drawing which shows the example of a change same as the above, respectively, (a) shows the state in which a lamp is in a lower limit position, (b) shows the state in which a lamp is in an upper limit position.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  In this embodiment, as shown in FIGS. 1A and 1B, an electric light source LT1 is fixed, and the lamp 1 is suspended and supported from a ceiling CE by at least one wire 2. The box 3 embedded in the ceiling CE directly above and fixed to the box 3 (that is, fixed to the ceiling CE via the box 3), and the lamp 1 is wound by winding and feeding out each wire 2. And a reel device 4 that is displaced vertically (that is, moved up and down) with respect to the ceiling CE.

  For example, a light emitting diode can be used as the light source LT1.

  Further, in the present embodiment, for example, a lighting device (not shown) that turns on the light source LT1 by appropriately converting electric power input from an external power source (not shown) such as a commercial power source and supplying the converted power to the light source LT1. Is provided. For example, when a light emitting diode is used as the light source LT1, a known DC power supply circuit can be used as the lighting device. The lighting device may be held by the lamp 1 or may be held by the box 3. When the lighting device is held by the lamp 1, a power supply wire (not shown) to the lighting device is drawn from the ceiling CE and connected to the lamp 1, and when the lighting device is held by the box 3 An electric wire (not shown) for feeding power from the lighting device to the light source LT1 is connected to the lamp 1. However, when the lighting device uses a battery (not shown) as a power source and both the battery and the lighting device are held by the lamp 1, the above-described electric wires are not necessary.

  The reel device 4 includes a reel (not shown) on which each wire 2 is wound. That is, if the reel rotates in the direction in which each wire 2 is wound (hereinafter referred to as “winding direction”), the lamp 1 is raised, and conversely, the reel feeds each wire 2. If it rotates in a direction (hereinafter referred to as “feeding direction”), the lamp 1 is lowered. More specifically, a known winding device can be used as the reel device 4. In this case, the reel device 4 includes a mainspring spring (not shown) that applies a rotational force in the winding direction to the reel, and the reel device 4 in the winding direction every time the reel rotates by receiving a force in the feeding direction. A latch mechanism (not shown) that alternately switches between a latch state that prohibits rotation and a release state that does not prohibit rotation of the reel; That is, when the lamp 1 is pulled downward when the latch mechanism is in the latched state, the latch mechanism is released and winding of the wire 2 by the spring force of the mainspring spring is started. When pulled downward again, the latch mechanism is brought into the latch state again, and the winding of the wire 2 is stopped. Alternatively, the reel device 4 may include an electric motor (not shown) that drives the reel. In any case, since the reel device 4 can be realized by a well-known technique, detailed illustration and description thereof are omitted.

  Further, the box 3 has a housing recess 30 in which the lamp 1 can be housed, and the lamp 1 is housed in the housing recess 30 as shown in FIG. 1B at the upper limit position of the movable range. .

  The lamp 1 is made of an opaque material and has a light source LT1 fixed on one surface. Therefore, the solid angle Sr1 irradiated with the direct light from the light source LT1 is centered on the direction A1 in which the one surface of the lamp 1 is directed (hereinafter referred to as “irradiation direction”) A1. That is, the shape of the range irradiated with the direct light from the light source LT1 is, for example, a conical shape with the light source LT1 as a vertex and the central axis parallel to the irradiation direction A1. More specifically, the lamp 1 has, for example, a concave portion in which an inner surface is coated or plated to diffuse or totally reflect the light of the light source LT1, and the light source LT1 is fixed to the inner bottom surface of the concave portion. is there. The lamp 1 may include a heat radiating plate (not shown) made of a material having a relatively high thermal conductivity and thermally connected to the light source LT1. Furthermore, when the above-described winding device is used as the reel device 4, it is desirable that the lamp 1 is provided with a hook or the like (not shown) for receiving an operation force for pulling down the lamp 1.

  Here, in this embodiment, the direction of the lamp 1 is inverted upside down as the lamp 1 is moved up and down. Specifically, as shown in FIG. 1A, when the lamp 1 is at the lower limit position of the movable range, the irradiation direction A1 is the upward direction, and thus the light of the light source LT1 is reflected light reflected by the ceiling CE. The effect of indirect illumination that a floor surface (not shown) and a desk surface (not shown) are illuminated is obtained. Further, as shown in FIG. 1B, when the lamp 1 is at the upper limit position of the movable range, the irradiation direction A1 is set downward, so that the floor surface and the desk surface are illuminated by the direct light emitted from the light source LT1. The effect of direct lighting is obtained.

  According to the above configuration, since the irradiation direction A1 is reversed as the lamp 1 is moved up and down, the change in the illumination effect accompanying the raising and lowering of the lamp 1 is greater than when the irradiation direction A1 is not changed.

  Hereinafter, a specific example of the light distribution changing unit that vertically inverts the direction of the lamp 1 as the lamp 1 is raised and lowered will be described with reference to FIGS. First, each of the lamps 1 is connected to one wire 2 at each of the connection points 11 at both ends in a direction orthogonal to the paper surface of FIGS. Are connected to each other, and can be rotated at least 180 ° with respect to the wire 2 with the line connecting the connection points 11 as a rotation axis. In the following description, the top, bottom, left, and right are based on FIG. That is, the direction orthogonal to the rotation axis and the vertical direction is referred to as the horizontal direction.

  Here, in a state where the lamp 1 is sufficiently lowered so as not to come into contact with the box 3 (hereinafter referred to as a “down state”), the lamp 1 has a posture in which the center of gravity is positioned directly below the rotation axis. It stabilizes at. That is, if the connection point 11 is located on the irradiation direction A1 side with respect to the center of gravity of the lamp 1, the lamp 1 in the lowered state is stabilized in a posture in which the irradiation direction A1 is directed upward.

  In addition, at the lower end of at least one of the front and rear inner surfaces of the storage recess 30 of the box 3, a reversal in which the cross-sectional shape in a cross-section orthogonal to the front-rear direction is circular at a position to the left of the connection point 11 in the lowered state The projecting convex portion 31 protrudes.

  Further, the lamp 1 is provided with an L-shaped reversal hole 12 that opens upward at a position that is below the reversal convex portion 31 in the lowered state and that has a lower end bent to the right. .

  That is, when each lamp 2 is wound up from the lowered state as shown in FIG. 2 (a) and the lamp 1 is lifted, the reversing convex portion 31 of the box 3 eventually becomes the lamp as shown in FIG. 2 (b). 1 is introduced into the reversing hole 12. Then, when each wire 2 is further wound in a state where the reversing convex portion 31 is in contact with the inner surface of the lower end of the reversing hole 12, the reversing convex portion 31 is on the left side of the connection point 11, As shown in FIG. 2C, the lamp 1 rotates counterclockwise around the reversing convex portion 31, and accordingly, the reversing convex portion 31 moves to the tip of the reversing hole 12. Further, when each wire 2 is wound up, the lamp 1 is turned upside down from the lowered state (hereinafter referred to as “rised state”) as shown in FIG. Reach. In the raised state, the inversion convex portion 31 is located on the left side of the center of gravity of the lamp 1.

  Contrary to the above, when each wire 2 is drawn out from the raised state shown in FIG. 2 (d), the reversing convex portion 31 is located on the left side of the center of gravity of the lamp 1, so that the lamp 1 is reversed. It rotates clockwise around the convex portion 31 for use. If sufficient momentum is applied at this time, as shown in FIG. 2 (b), the inversion convex portion 31 reaches the vicinity of the opening of the inversion hole 12, and each wire 2 is further fed out for inversion. The convex portion 31 protrudes upward from the reversing hole 12 and the lamp 1 is lowered as shown in FIG.

  That is, the box 3 constitutes a light distribution changing means for changing the irradiation direction A1 as the lamp 1 is moved up and down.

  Here, at the time of transition from the raised state to the lowered state as described above, since it is necessary to rotate the lamp 1 with some momentum, in order to prevent the lamp 1 from rotating excessively, the inner surface of the storage recess 30 in the box 3 is used. Is provided with a convex portion 32 that prevents excessive rotation in the clockwise direction as described above by contacting the left end portion of the lamp 1 from above.

  Instead of providing the reversing convex portion 31 and the reversing hole 12 as described above, the left end of the lamp 1 hits the convex portion 32 at the time of transition between the raised state and the lowered state, and the momentum in the vertical direction becomes the rotational momentum. It is good also as a structure by which the direction of the lamp 1 is reversed upside down by converting.

  Further, as shown in FIG. 3, the auxiliary light source LT2 that emits light to a predetermined solid angle Sr2 including the downward direction, and the auxiliary light source lighting that turns on the auxiliary light source LT2 at least during the period when the irradiation direction A1 is the upward direction. An apparatus (not shown) may be provided. In the example of FIG. 3, the auxiliary light source LT <b> 2 is held by the auxiliary lamp 5 embedded in the ceiling CE in the vicinity of the box 3. In other words, during the period in which the irradiation direction A1 is set to the upward direction, environmental illumination (ambient illumination) can be obtained by the light source LT1, and task illumination can be obtained by the auxiliary light source LT2. As the auxiliary light source LT2, an electric light source of the same type as the light source LT1 may be used. For example, a light emitting diode is used as the light source LT1 and a fluorescent lamp is used as the auxiliary light source LT2, and the light source LT1 and the auxiliary light source LT2 are different types. An electrical light source may be used. Since the auxiliary light source LT2 and the auxiliary light source lighting device as described above can be realized by a well-known technique like the light source LT1 and the lighting device, detailed illustration and description thereof will be omitted.

  Further, by reversing the irradiation direction A1 in the lamp 1 as described above, as shown in FIG. 4A, when the lamp 1 is at the lower limit position of the movable range, the irradiation direction A1 is set as the downward direction and the direct illumination effect is achieved. On the other hand, as shown in FIG. 4B, the irradiation direction A1 may be directed upward when the lamp 1 is in the housing recess 30 that is the upper limit position of the movable range. Even in this case, as the lamp 1 moves up and down, the illumination effect changes greatly due to the reversal of the irradiation direction A1. In the above case, when the lamp 1 is at the upper limit position of the movable range, the light source LT1 is covered with the lamp 1 when viewed from below, so that the movable range of the lamp 1 is larger than that of the example of FIGS. The lamp 1 at the upper limit position can be made inconspicuous. Further, in the above case, the lighting device may turn off the light source LT1 when the lamp 1 is at the upper limit position of the movable range.

1 lamp 2 wire 3 box (light distribution change means)
4 Reel device CE Ceiling LT1 Light source LT2 Auxiliary light source

Claims (5)

A lighting device for lighting an electrical light source;
A light fixture in which the light source is fixed and supported by being suspended from the ceiling by at least one wire;
A reel device that raises the lamp by winding each wire and lowers the lamp by feeding each wire;
An illumination fixture comprising: a light distribution changing unit that changes an irradiation direction in which light from the light source is irradiated as the lamp is raised and lowered.   The light distribution changing means sets the irradiation direction downward when at least the lamp is at the upper limit position of the movable range, and sets the irradiation direction upward when at least the lamp is at the lower limit position of the movable range. The lighting fixture according to claim 1.   The light distribution changing means sets the irradiation direction downward when at least the lamp is at the lower limit position of the movable range, and sets the irradiation direction upward when at least the lamp is at the upper limit position of the movable range. The lighting fixture according to claim 1. An auxiliary light source that emits light downward;
The lighting apparatus according to claim 2, further comprising: an auxiliary light source lighting device that lights the auxiliary light source at least during a period in which the irradiation direction is an upward direction.   The lighting apparatus according to claim 3, wherein the lighting device turns off the light source at least in a state where the lamp is at an upper limit position of a movable range.

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