JP2014191929A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture in which attachment/detachment workability of a straight tube LED lamp is improved, and which can correspond to a plurality of kinds of straight tube LED lamps having different tube diameters.SOLUTION: A maximum dimension between a pair of holding pieces 52 in a width direction is defined as A, and a minimum dimension between a pair of guide pieces 53 in the width direction is defined as B. Also, a maximum dimension between the pair of guide pieces 53 in the width direction is defined as C, and an outer diameter of a tube portion of a lamp 8 is defined as D. Then, a support spring 5 is formed so as to satisfy the relation of B<A<D and C≒D. Therefore, when inserting the lamp 8 between the pair of holding pieces 52, a tip of each guide piece 53 is hardly hooked into a recessed groove 810 of a heat radiation member 81, and attachment/detachment workability of the lamp 8 can therefore be improved. Furthermore, as the support spring 5 is formed in such a manner that the maximum dimension A between the pair of holding pieces 52 does not become larger than the outer diameter D of the lamp 8, it can correspond to a plurality of kinds of straight tube LED lamps 8 having different tube diameters.

Description

  The present invention relates to a lighting apparatus for a straight tube LED lamp.

  In recent years, instead of a straight tube fluorescent lamp and a lighting device for a straight tube fluorescent lamp, a straight tube LED lamp and a lighting device for a straight tube LED lamp are becoming widespread (see Patent Document 1). The lighting fixture described in Patent Literature 1 includes a rectangular box-shaped fixture body embedded in a ceiling, a reflector attached to the inner bottom surface of the fixture body, a pair of lamp sockets, and a lamp support spring.

  The lamp sockets are provided at both ends in the longitudinal direction of the reflector. The straight tube LED lamp is mounted on the lamp socket by inserting pins protruding from the caps at both ends into grooves provided on the lower surface of the lamp socket, and then rotating about 90 degrees around the axis.

  The lamp support spring is formed by bending a metal plate material into a substantially Ω shape, and is fitted and supported by a tube portion of a straight tube LED lamp.

JP 2013-26032 A

  By the way, the tube part of the straight tube LED lamp is formed of a metal (aluminum) heat dissipation member in an area of about a half circumference in the circumferential direction, and the area of the remaining half circumference is a translucent material such as glass or synthetic resin. It is formed with. Furthermore, the heat radiating member is formed with a large number of concave grooves along the axial direction in order to increase the surface area.

  Therefore, when the straight tube LED lamp is rotated, the tip of the lamp support spring is caught in the concave groove of the heat radiating member, and the straight tube LED lamp may not be attached and detached smoothly.

  Further, there are several types of straight tube LED lamps having different tube diameters, and it is necessary to deal with all of these plural types of straight tube LED lamps with one type of lamp support spring.

  The present invention has been made in view of the above problems, and aims to improve workability of attaching and detaching a straight tube LED lamp and to support a plurality of types of straight tube LED lamps having different tube diameters. .

  The lighting fixture of the present invention includes a fixture main body disposed on a ceiling, a plurality of lamp sockets attached to the fixture main body and detachably mounted with a base of a straight tube LED lamp, and attached to the fixture main body. One or a plurality of lamp support springs that support the tube portion of the straight LED lamp, and the lamp support springs are a pair of plate-shaped mounting pieces and a pair of hanging parts respectively suspended from both ends in the width direction of the mounting pieces. An arm piece; a pair of holding pieces that are suspended from the tip of each arm piece and formed in an arc shape; and a pair of guide pieces that protrude away from the tip of each holding piece; In a state where the portion is not supported, the maximum dimension between the pair of holding pieces in the width direction is larger than the minimum dimension between the pair of guide pieces in the width direction, and the straight tube LED lamp The maximum dimension between the pair of guide pieces in the width direction is smaller than the outer diameter of the tube portion, and the outer diameter of the tube portion of the straight tube LED lamp is substantially equal, or in the width direction. The maximum dimension between the pair of guide pieces is configured to be larger than the outer diameter of the tube portion of the straight tube LED lamp.

  In this lighting apparatus, it is preferable that the guide piece protrudes in parallel with a tangent line at a point where the guide piece first comes into contact with the tube portion when the base is mounted.

  In this lighting apparatus, it is preferable that the guide piece protrudes away from the tube portion with respect to a tangent line at a point of contact with the tube portion first when the base is mounted.

  In the lighting fixture of the present invention, when a straight tube LED lamp is inserted between a pair of holding pieces, the leading end of each guide piece is not easily caught by the tube portion, so that the workability of attaching / detaching the straight tube LED lamp can be improved. it can. Furthermore, since the support spring is formed so that the maximum dimension between the pair of holding pieces is not larger than the outer diameter of the straight tube LED lamp, it can be used for a plurality of types of straight tube LED lamps having different tube diameters. Become.

Embodiment of the lighting fixture which concerns on this invention is shown, (a)-(c) is sectional drawing of a lamp | ramp support spring and a straight tube | pipe LED lamp. It is an exploded perspective view same as the above. It is a perspective view same as the above. It is a perspective view of the lamp | ramp support spring in the same as the above. It is a perspective view of the lamp socket and straight tube | pipe LED lamp in the same as the above. (a), (b) is sectional drawing of the lamp | ramp support spring and straight tube | pipe LED lamp of another structure in the same as the above. It is a perspective view which shows another embodiment of the lighting fixture which concerns on this invention. It is a perspective view which shows another embodiment of the lighting fixture which concerns on this invention.

  Hereinafter, embodiments of a lighting fixture according to the present invention will be described in detail with reference to the drawings. In the present embodiment, a straight tube LED lamp (hereinafter abbreviated as a lamp) conforming to the Japan Electric Bulb Industry Association standard JEL801 “Straight tube LED lamp system with L-shaped pin cap GX16t-5 (for general lighting)”. 8 is a light source. However, the technical idea of the present invention can also be applied to a lighting fixture that uses a straight tube LED lamp that does not conform to the standard as a light source.

  As shown in FIG. 5, the lamp 8 includes a cylindrical tube portion and a pair of caps 82 and 83 provided at both ends of the tube portion. The tube part consists of a semi-cylindrical cover 80 made of a light-transmitting synthetic resin (e.g., polycarbonate) and a semi-cylindrical heat dissipation made of a metal (e.g., aluminum) having a relatively high thermal conductivity and a light weight. And a member 81. The heat dissipating member 81 has a long substrate mounted with a large number of LEDs arranged in a straight line on the inner bottom surface facing the cover 80, and dissipates heat generated by the large number of LEDs to the outside of the tube portion. . On the outer surface of the heat radiating member 81, long concave grooves 810 along the axial direction (longitudinal direction) are provided at equal intervals along the circumferential direction.

  The lighting fixture of this embodiment is provided with the fixture main body 1, two sets of lamp sockets 2 and 3, the reflecting plate 4, and the lamp support spring 5, as shown in FIG.2 and FIG.3. The instrument body 1 is formed into a substantially U-shaped cross section with its lower surface opened by bending a metal plate, and a pair of insertion holes (not shown) through which the mounting bolts 100 provided on the ceiling are inserted are perforated. Has been. That is, when attaching the instrument body 1 to the ceiling, the nut 102 may be tightened with the washer 101 interposed between the attachment bolts 100 inserted through the insertion holes.

  Further, the instrument body 1 has a power supply line insertion hole 10 formed therein at approximately the center in the longitudinal direction for drawing a power supply line 103 connected to an AC power supply made of a commercial power supply and precedingly wired on the back of the ceiling. Furthermore, a terminal block 7 and a power supply device 6 are attached to the lower surface of the instrument body 1 so as to sandwich the power supply line insertion hole 10 in the longitudinal direction. Here, the power line 103 drawn through the power line insertion hole 10 is connected to the terminal block 7. The power supply device 6 houses a printed wiring board (not shown) on which a power conversion circuit (AC / DC converter) or the like for converting AC power supplied from a commercial power source into DC power is mounted in a metal case. Configured. However, since such a power supply device 6 is well known in the art, illustration and description of a detailed configuration and operation are omitted.

  The two types of lamp sockets 2 and 3 that make a pair are compliant with the Japan Electric Bulb Industry Association Standard JEL801 “Straight-tube LED lamp system with L-shaped pin cap GX16t-5 (for general lighting)”. The lamp socket 2 is for power feeding, and the other lamp socket 3 is for grounding. That is, the power supply lamp socket 2 is configured such that a pair of L-shaped pins 820 provided on the base 82 on one side is connected, and a DC voltage is applied between the pair of L-shaped pins 82. The grounding lamp socket 3 is connected to a grounding pin 830 provided on the base 83 on the other side, and mechanically holds the grounding pin 830 and is electrically connected to the instrument body 1 grounded to the ground. Connect to. However, the ground pin 830 connected to the lamp socket 3 may not be electrically connected to the instrument body 1 and may be used only for mechanical holding.

  The reflection plate 4 is formed into a substantially V-shaped cross section by bending a metal plate, and is attached to the instrument body 1 so as to cover the lower surface opening. The reflector 4 is attached to the instrument main body 1 by screwing the thumbscrews 12 to the three fixtures 11 provided at both ends and the center in the longitudinal direction of the instrument main body 1. Further, the reflector 4 is provided with socket insertion holes 40 through which the lamp sockets 2 and 3 are inserted at both ends in the longitudinal direction. Further, an attachment hole 41 for attaching the lamp support spring 5 is provided in the vicinity of the center of the reflection plate 4 in the longitudinal direction.

  As shown in FIG. 4, a lamp support spring (hereinafter abbreviated as a support spring) 5 is a metal plate in which an attachment piece 50, a pair of arm pieces 51, a pair of holding pieces 52, and a pair of guide pieces 53 have spring properties. Are formed integrally in a substantially Ω shape by punching and bending. In the following description, unless otherwise specified, the directions of up, down, left, and right in FIG. 4 are defined.

  The attachment piece 50 is a rectangular flat plate as a whole, and is formed by cutting and raising the first engagement piece 500 and the second engagement piece 501 at the left and right end portions in the center in the front-rear direction. The first engagement piece 500 has a tip portion bent outward (rightward) at a substantially right angle. On the other hand, the second engagement piece 501 is bent at an acute angle inwardly (diagonally to the right). That is, after the first engaging piece 500 is inserted and locked in one mounting hole 41, the second engaging piece 501 is inserted and locked in the other mounting hole 41, whereby the mounting piece 50 (support spring 5) is fixed. Attached to the reflector 4.

  Each arm piece 51 has a rectangular flat plate shape and is bent downward from both left and right ends of the attachment piece 50. However, the arm pieces 51 are slightly inclined so as to narrow each other toward the lower end.

  Each holding piece 52 is formed in an arc shape that hangs downward from the lower end of the mounting piece 50 and protrudes outward. In addition, each holding piece 52 is formed with a ridge 54 along the circumferential direction (vertical direction) of the lamp 8 on the surface facing the tube portion. That is, when the tube portion of the lamp 8 is elastically sandwiched between the pair of holding pieces 52, only the tip portion of the protrusion 54 comes into contact with the tube portion of the lamp 8.

  Each guide piece 53 protrudes outward and downward from the lower end of the holding piece 52. The protrusion 54 is formed not only on the holding piece 52 but also on the guide piece 53.

  Here, as shown in FIG. 1A, the maximum dimension between the pair of holding pieces 52 (tips of the protrusions 54) in the width direction (left and right direction) is A, and the pair of guide pieces 53 (projections) in the width direction. Let B be the minimum dimension between the tips of the strip 54. Further, as shown in FIG. 1A, the maximum dimension between the pair of guide pieces 53 in the width direction (the distance between the tips) is C, and the outer diameter of the tube portion of the lamp 8 is D. At this time, in order to hold the tube portion of the lamp 8 with the pair of holding pieces 52, at least the relationship of B <D needs to be established. Furthermore, in order to cope with a plurality of types of lamps 8 having different tube diameters, the support spring 5 may not have a maximum dimension A between the pair of holding pieces 52 larger than the minimum diameter of the plurality of types of lamps 8. desirable.

  For fluorescent lamps, the tip of the guide piece 53 is not easily caught on the tube portion even if C is much smaller than D. However, for straight tube LED lamp 8, if C is much smaller than D, The leading end of the guide piece 53 is easily caught in the concave groove 810 of the heat radiating member 81. Therefore, in this embodiment, the support spring 5 is formed so as to satisfy the relationship of B <A <D and C≈D, and the tip of the guide piece 53 is difficult to be caught in the concave groove 810 of the heat radiating member 81. However, C may be larger than D as shown in FIG.

  As described above, according to the present embodiment, when the lamp 8 is inserted between the pair of holding pieces 52, the leading end of each guide piece 53 is not easily caught in the concave groove 810 of the heat radiating member 81. Workability can be improved. Further, since the support spring 5 is formed so that the maximum dimension A between the pair of holding pieces 52 does not become larger than the outer diameter D of the lamp 8, the support spring 5 can be used for a plurality of types of straight tube LED lamps 8 having different tube diameters. It is possible.

  By the way, the guide piece 53 protrudes in parallel with the tangent line LP at the point P that first contacts the tube portion when the lamp 8 (bases 82, 83) is mounted (see FIG. 1A), or with respect to the tangent line LP. It is desirable to protrude away from the tube portion (see FIG. 6 (a)). In the former case, the tube portion can be inserted with a uniform force, and there is an advantage that the range of the corresponding tube diameter is relatively wide. On the other hand, the latter case has an advantage that the guide piece 53 is less conspicuous than the former case because it is hidden in the tube portion.

  Here, the position of the point P moves outward as the tube diameter of the lamp 8 increases. Therefore, if the guide piece 53 is formed in a curved shape so as to protrude in the direction of the tangent line LP at each position of the point P, with a plurality of types of lamps 8 having different tube diameters, a uniform force can be applied when inserting the tube portion. There is an advantage that it can be inserted.

  The guide piece 53 does not need to be flat as a whole, and the tip (lower end) portion may be bent upward in order to facilitate insertion of the tube portion. Furthermore, in order to suppress the influence on the optical characteristics (light distribution characteristics) of the lamp 8, it is preferable to make the minimum dimension B between the pair of guide pieces 53 in the width direction as small as possible. For example, in the case of the lamp 8 that complies with JEL801 “Straight-tube LED lamp system with L-shaped pin cap GX16t-5 (for general lighting)”, the luminous flux within 120 degrees when viewed from the axial direction is less than 70%. Therefore, it is preferable to arrange the guide piece 53 outside this angular range.

  By the way, if the width dimension in the left-right direction of the mounting piece 50 is set to be equal to or smaller than the distance between the tips (lower ends) of the arm pieces 51, the arm piece 51 is seated when the tube portion of the lamp 8 is pressed against the guide piece 53. There is an advantage that it becomes difficult to bend. However, since the stability of the support spring 5 is reduced when the width dimension of the mounting piece 50 is narrowed, the distance between the tips (lower ends) of the arm pieces 51 is substantially the same or slightly smaller as in this embodiment. It is desirable.

  In addition, although this embodiment illustrated the two-lamp type lighting fixture which mounts the two lamps 8 in the fixture main body 1, as shown in FIG. 7, the one-lamp type lighting which mounts only one lamp 8 is shown. It may be an instrument. Or you may be a lighting fixture of a structure as shown in FIG. The lighting fixture shown in FIG. 8 illuminates an exhibition (for example, a painting) hung on the wall of a museum or an art museum exhibition room, or illuminates a blackboard installed on a lecture room or classroom wall. is there.

1 Appliance body 2 Lamp socket 3 Lamp socket 5 Lamp support spring 8 Straight tube LED lamp
50 Mounting piece
51 arms
52 Holding piece
53 Guide piece

Claims (3)

An instrument body disposed on the ceiling, a plurality of lamp sockets attached to the instrument body and removably mounted with a base of a straight tube LED lamp, and a tube of the straight tube LED lamp attached to the instrument body One or more lamp support springs for supporting the part,
The lamp support spring includes a flat plate-shaped mounting piece, a pair of arm pieces hanging from both ends in the width direction of the mounting piece, and a pair of arc-shaped pieces hanging from the tip of each arm piece. A holding piece and a pair of guide pieces projecting away from the tip of each holding piece, the maximum dimension between the pair of holding pieces in the width direction in a state where the tube portion is not supported Is larger than the minimum dimension between the pair of guide pieces in the width direction and smaller than the outer diameter of the tube portion of the straight tube LED lamp, and further, the maximum dimension between the pair of guide pieces in the width direction. And the outer diameter of the tube portion of the straight tube LED lamp is substantially equal, or the maximum dimension between the pair of guide pieces in the width direction is larger than the outer diameter of the tube portion of the straight tube LED lamp. Luminaire, characterized in that it is configured to be larger.   The lighting device according to claim 1, wherein the guide piece protrudes in parallel with a tangent at a point where the guide piece first contacts the pipe portion when the base is mounted.   The lighting device according to claim 1, wherein the guide piece protrudes away from the tube portion with respect to a tangent line at a point where the guide portion first contacts the tube portion when the base is mounted.

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