JP2008112582A - Lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture in which an elastic member energizing a lamp tool will not be permanently deformed, even if the lamp tool is pushed in excessively. <P>SOLUTION: The lighting fixture is provided with a lamp tool 11 accommodating a light source 20, the fixture body 31, a leaf spring 41 and a stopper 51. The front-side part of the lamp too1 1 has a semi-spherical outer surface 12a and the rear-side part of the lamp tool 11 has a rear surface 17a made from a part of a sphere. The fixture body 31 has a plurality of spring fixing holes 35 and an opening 32a, with a diameter smaller than the maximum diameter of the semi-spherical outer surface 12a. The lamp tool is variably supported of direction at an edge of the opening 32a so that an irradiation direction can be changed. The leaf spring 41 has a plurality of fixing parts 42 to be fixed to a fixing hole 35 and pushing parts 42, which are arranged between these fixing parts and contact elastically with the rear surface 17a and pushes the lamp tool 11 toward the edge of the opening 32a. The stopper 51 is fixed firmly on the fixture body 31. When the lamp tool 11 is pushed in and shifted toward the leaf spring 41, the stopper stops the lamp tool 11 to be shifted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lighting fixture such as a reading lamp that can freely change the direction of a lamp having a light source and adjust the light irradiation direction.

  Conventionally, a substantially spherical lamp with a built-in light source is placed on the edge of the circular opening of the instrument body, and a pair of fixing parts of the elastic member are fixed to the instrument body, so that the holding part of the elastic member is A downlight is known in which a lamp is pressed from above to achieve attachment of the lamp to the fixture body and holding of the irradiation direction of the lamp by bringing the lamp into contact with the back surface (see, for example, Patent Document 1). .

In this downlight, the lamp is kept stationary by the frictional force between the edge of the circular opening of the fixture body and the lamp pressed against it, and the frictional force between the lamp and the pressing part elastically contacting the lamp. Can be retained. At the same time, the lighting direction of the light from the lamp can be adjusted by rotating the lamp against the frictional force from the lower side of the circular opening of the fixture body and arbitrarily changing the direction of the lamp.
Japanese Patent Laying-Open No. 2005-149790 (paragraphs 0013-0019, FIGS. 1 to 5)

  The lighting fixture of patent document 1 is the structure which receives the pushed lamp body only by an elastic member, when the lamp body is pushed. For this reason, when checking the rotation state of the lamp when installing the luminaire or during actual use, etc., if the lamp is accidentally pushed excessively, especially the holding part of the elastic member will be excessive. Deformation may cause permanent deformation. This is more apparent when the lighting fixture is not a downlight and is used in a condition where the lamp is likely to be pressed. When the elastic member is permanently deformed, as the lamp cannot be pushed with a predetermined force, the performance of holding the lamp in the adjusted direction is lowered, and it becomes difficult to hold the irradiation direction.

  An object of the present invention is to provide a lighting fixture in which an elastic member that biases the lamp is not permanently deformed even when the lamp is excessively pushed.

  The invention of claim 1 is a lamp with a built-in light source, wherein a front side portion of the lamp has a hemispherical outer surface, and a rear side portion of the lamp has a back surface formed of a part of a spherical surface. The lamp; having a plurality of member mounting portions and an opening having a diameter smaller than the maximum diameter of the hemispherical outer surface, and receiving the hemispheric outer surface at an edge of the opening so that the irradiation direction by the lamp can be changed. An instrument main body that supports the lamp so that it can be turned; a plurality of fixing parts that are attached to the member attaching part; and a pressing part that is provided between the fixing parts and elastically contacts the back surface. A pressing member made of an elastic material that presses against an edge of the opening; and a stopper that is fixedly provided on the instrument body and receives the lamp that is moved when the lamp is pushed and moved toward the pressing member. As a feature Yes.

  In the invention of claim 1, it is preferable that the opening of the fixture body supports the hemispherical outer surface of the lamp at the entire periphery thereof. However, there are three supporting protrusions forming a part of the edge along the circumferential direction of the opening edge. It is also possible to provide at equal intervals or more, preferably at equal intervals, and to support the hemispherical outer surface of the lamp on these support convex portions. In the invention of claim 1, an output convex portion may be provided on the top of the hemispherical outer surface, and the light emitted from the light source may be emitted through the convex portion, or the hemispherical outer surface may be removed by removing the output convex portion. The light emitted from the light source may be emitted through the top of the light source. In the invention of claim 1, a lamp other than the light emitting diode can be used as the light source. In the first aspect of the invention, the stopper can be formed by a plurality of screws that are screwed inwardly from the outside of the instrument body and project into the instrument body, and formed by a plurality of cut-and-raised portions raised from the instrument body to the inside thereof. It is also possible to provide as many stoppers as possible in these cases. In addition, when the stopper is formed of a separate part from the instrument body, this stopper may be provided so that it can be somewhat loose in the direction in which the central axis of the instrument body extends.

  In the invention of claim 1, since the lamp is normally pressed against the edge of the opening of the instrument body by the elastic force of the pressing portion, the lamp is separated from the stopper. Thereby, since the stopper does not hinder the movement of the lamp due to the turning operation of the lamp, it is possible to arbitrarily adjust the light irradiation direction by changing the direction of the lamp. If the lamp is accidentally pushed in with an excessive force, the lamp is received by the stopper, so that the lamp can be prevented from being pushed any further. As a result, it is possible to prevent all of the excessive pressing load from acting on the pressing portion of the elastic member urging the lamp toward the opening of the fixture body, and the elastic member can be prevented from being permanently deformed.

  The invention of claim 2 is characterized in that the stopper is formed by a ring attached inside the instrument body.

  According to the present invention, the pushed lamp can be reliably received by the stopper regardless of the direction in which the lamp is pushed excessively.

  According to the first aspect of the present invention, when the lamp is excessively pressed, not all of the pressing load acts on the elastic member that urges the lamp, so that it is possible to prevent permanent deformation of the elastic member. Possible lighting fixtures can be provided.

  According to the second aspect of the present invention, it is possible to reliably receive the pushed lamp with the stopper and prevent the elastic member from being permanently deformed, regardless of the direction in which the lamp is pushed excessively.

  An embodiment of the present invention will be described with reference to FIGS. The lighting fixture of this embodiment is used as a reading lamp 1. That is, for example, seats are arranged side by side along the direction in which the passage extends in at least one side of a passage in a transport body such as a passenger car, an aircraft cabin, a passenger ship, and the like. The reading lamp 1 is installed at one end in the width direction, in other words, at the seat shoulder. In this case, among the pair of seats arranged on the aisle side and the window side, the reading lamp 1 is installed on the aisle seat shoulder for the aisle seat, and the window side seat shoulder for the window side seat Reading lamp 1 is installed in the department. When a passenger sitting on a seat reads a book, the reading lamp 1 projects light by spotting light from the passenger's shoulder over his / her shoulder.

  As shown in FIGS. 1 to 8, the reading lamp 1 includes a lamp 11, an instrument body 31, a pressing member made of an elastic material such as a leaf spring 41, and a stopper 51.

  The lamp 11 includes a cover 12, a lamp body 15, a light source 20, a lens 22, and the like.

  The cover 12 forms a front side portion of the lamp 11 and is made of a synthetic resin. As shown in FIGS. 3 and 6 and the like, the cover 12 has a hemispherical outer surface 12a, and has an output convex portion 13 integrally protruding from the top of the outer surface 12a, and is formed in a bowl shape. The tip of the output convex portion 13 is open. The end of the cover 12 opposite to the emission convex portion 13 is also open, and the outer diameter of the hemispherical outer surface 12a is maximum at the open end.

  The lamp body 15 forms a rear side portion of the lamp 11, and is a die-cast product of an aluminum alloy that is lighter than metal, preferably iron, and has excellent thermal conductivity. As shown in FIGS. 3, 6 to 8, and the like, the lamp body 15 includes a body base portion 16, a back convex portion 17, and a pair of arc-shaped portions 18.

  The body base portion 16 is a portion disposed inside the cover 12. An end surface that becomes the head when the body base portion 16 is inserted into the cover 12, that is, an end surface 16 a facing the emission convex portion 13 side, is formed as a flat surface.

  The rear convex portion 17 is integrally projected on the rear side of the body base portion 16. Both side surfaces of the back convex portion 17 are substantially parallel to each other, and the back surface 17a between the both side surfaces is formed as a part of a spherical surface. The back surface convex part 17 has a pair of groove | channels 17b. These grooves 17b are formed so as to be shifted from the top of the rear convex portion 17 and open to the rear surface 17a.

  The pair of arcuate portions 18 are provided so that both ends thereof are integrally connected to the side surface of the body base portion 16 so as to project at right angles from the side surface of the body base portion 16. These arc-shaped portions 18 are configured to cover the large-diameter opening ends of the cover 12, and protrusions 18 a are provided on the outer peripheral surface of the central portion of the arc-shaped portion 18. These protrusions 18 a protrude so as to be away from the rear surface protrusion 17. As shown in FIG. 6, the lamp body 15 has concave portions 15 a formed between the arc-shaped portion 18 and the side surface of the body base portion 16.

  As described above, both side surfaces of the rear surface convex portion 17 of the lamp body 15 are substantially parallel to each other, the pair of grooves 17b are provided in the rear surface convex portion 17, and the pair of concave portions 15a is provided in the lamp body 15. This contributes to lightening the lamp body 15 and is consequently preferable in that the reading lamp 1 as a whole can be reduced in weight as well as the lamp 11 which is a part to be rotated. Furthermore, since the surface area of the lamp body 15 is increased by the pair of grooves 17b and the pair of recesses 15a, it is preferable in that the heat dissipation performance from the lamp body 15 can be improved.

  As shown in FIG. 7, the lamp body 15 and the cover 12 are connected to each other by a pair of screws 19 screwed into the cover 12 from the groove 17 b through the body base portion 16.

  As shown in FIGS. 6 and 7, a light source 20 in which an LED (light emitting diode) 20 b that emits white light, for example, is mounted on a substrate 20 a is used. The light source 20 is disposed on the end surface 16 a of the body base portion 16 with the heat conductive sheet 21 interposed therebetween. The lens 22 disposed to cover the light source 20 controls and emits the light emitted from the LED 20 b and is supported in the lens holder 23. The lens holder 23 is formed by combining two holder members. The lens holder 23 is inserted into the output convex portion 13 and disposed inside the cover 12. The lens holder 23 is attached to the lamp body 15 by screws 24 that are respectively inserted from the inside of the pair of recesses 15 a and are screwed into the screw receiving portions of the lens holder 23 through the body base portion 16.

  By this attachment, the heat conductive sheet 21 and the substrate 20a of the light source 20 that are overlapped with each other are sandwiched between the lens holder 23 and the end surface 16a of the body base portion 16, and the heat conductive sheet 21 becomes the end surface of the body base portion 16. 16a. As a result, the heat generated by the LED 20b as it is turned on can be smoothly transferred to the body base 16 via the thermal conductive sheet 21 and released from the surface of the body base 16, so that the temperature rise of the LED 20b is suppressed. The predetermined luminous performance can be maintained.

  1 to 3 and 6, reference numeral 26 denotes an insulated wire, and the electric wire 26 is connected to a power supply pattern (not shown) provided on the substrate 20 a of the light source 20 through the bottom of one recess 15 a. Yes. As shown in FIGS. 3 to 6, the electric wire 26 extends along one side surface of the rear surface convex portion 17 and is held by an electric wire holder 27 screwed to one side surface of the rear surface convex portion 17 in this portion.

  The instrument body 31 is, for example, an aluminum alloy die-cast product, and is formed by projecting a pair of arc-shaped walls 33 on the back surface of the ring portion 32 as shown in FIGS. The circular opening 32a of the ring portion 32 has a smaller diameter than the maximum diameter of the hemispherical outer surface 12a, and the edge of the opening 32a contacts the hemispherical outer surface 12a to support the hemispherical outer surface 12a slidably. It is formed with a surface.

  The pair of arcuate walls 33 are provided opposite to each other so as to accommodate the lamp 11 therebetween, and a gap G (see FIG. 3) is formed between the ends of the arcuate wall 33 in the direction in which the arc extends. Has been. The pair of gaps G are separated by approximately 180 degrees in the circumferential direction of the instrument body 31. The width of the gap G is wider than the width of the protrusion 18 a of the lamp body 15.

  Each arcuate wall 33 is provided with at least one guide portion 34 and, for example, a spring attachment hole 35 as a member attachment portion located at the end opposite to the ring portion 32. The guide portion 34 is open to the end surface of the opposite end portion, and is inclined so as to protrude from the end surface to the outer surface of the arc-shaped wall 33. The spring mounting hole 35 is formed as a square hole provided adjacent to the guide portion 34 and closer to the ring portion 32.

  On each inner surface of each arc-shaped wall 33, a step portion 36 is formed at an end opposite to the ring portion 32. These step portions 36 are formed to extend along the arc of the arc-shaped wall 33. A concave groove 37 is provided in the middle of the step portion 6 so as to be continuous with the spring mounting hole 35.

  As shown in FIGS. 1, 3, and 4, the leaf spring 41 has the same number of fixing portions 42 as the spring mounting holes 35 formed in the instrument body 31, and a pressing portion 43 that extends between these fixing portions. Each fixing portion 42 is arranged at equal intervals, for example, every 120 °, and is formed by bending in an L shape. The pressing portion 43 has a shape in which three arms protrude radially, in other words, has a tridental shape, and the fixing portion 42 is bent from the tip of each arm. The leaf spring 41 is attached to the instrument body 31 by inserting the respective fixing portions 42 into the spring attachment holes 35 from the outside and hooking them.

  As shown in FIG. 3 and the like, the stopper 51 is formed of, for example, a metal ring. An anti-rotation projection 52 is integrally projected on a part of the outer periphery of the ring-shaped stopper 51. The width of the rotation preventing projection 52 is formed to be substantially equal to the width of the gap G so as to be fitted into the gap G. An escape groove 53 is provided on the inner periphery of the stopper 51 so as to be adjacent to the rotation preventing projection 52. The escape groove 53 is provided to suppress interference with the electric wire 26 drawn out through the stopper 51. As shown in FIGS. 6 and 7, the stopper 51 is supported by the step portion 36 and disposed inside the instrument body 31.

  Next, a procedure for assembling the reading lamp 1 by preparing the appliance main body 31, the leaf spring 41, the stopper 51, and the pre-assembled lamp 11 will be described.

  First, the pair of protrusions 18 a of the lamp 11 are aligned with the pair of gaps G of the instrument body 31, and the lamp 11 is accommodated inside the instrument body 31 with the cover 12 at the top. As a result, the top portion of the cover 12 including the output convex portion 13 is inserted into the opening 32a of the fixture body 31, and the hemispherical outer surface 12a of the lamp 11 is in contact with the edge of the opening 32a to support the lamp 11. At the same time, the pair of protrusions 18a are disposed in the corresponding pair of gaps G. Further, in this accommodated state, the tip of the rear projection 17 of the lamp 11 protrudes higher than the arcuate wall 33 of the fixture body 31.

  Thereafter, a ring-shaped stopper 51 is accommodated in the instrument body 31 so that the escape groove 53 faces the electric wire 26 drawn out from the lamp 11, and the stopper 51 is placed on the step portion 36 of the instrument body 31. At the same time, the detent protrusion 52 of the stopper 51 is fitted into one gap G. As a result, the rear projection 17 of the lamp 11 passes through the inner side of the lamp 11 without contacting the stopper 51, and the arc-shaped portion 18 of the lamp 11 has a center line of the fixture body 31 with respect to the arc-shaped portion 18 of the lamp 11. It is arranged away in the extending direction. This separation distance is indicated by a symbol L in FIGS. The separation distance L is provided to allow the lamp 11 to be moved by a human hand with respect to the instrument body 31.

  Finally, the leaf spring 41 is attached to the instrument body 31. This attachment is performed by pressing the leaf spring 41 by aligning each fixing portion 42 with the guide portion 34 of the instrument body 31. Thereby, immediately after the fixing portion 42 passes through the guide portion 34 while being elastically deformed, the fixing portion 42 enters the spring attachment hole 35 and is caught. In this case, as shown in FIGS. 1 and 2, the fixing portion 42 is arranged so as to sandwich the stopper 51 between the step portion 36. Therefore, simultaneously with the attachment of the leaf spring 41, the leaf spring 41 can be used to hold the stopper 51 so as not to be detached from the instrument body 31.

  As a result of the assembly according to the above procedure, the pressing portion 43 of the leaf spring 41 is elastically deformed to some extent, and its central portion 43a is elastically in contact with the back surface 17a of the lamp 11 and the hemispherical outer surface of the lamp 11 12a is pressed against the edge of the opening 32a, and the lamp 11 is held so as not to be detached from the instrument body 31. Therefore, the frictional force between the edge of the opening 32a of the fixture body 31 and the hemispherical outer surface 12a of the lamp 11 pressed against the edge, and the pressing of the leaf spring 41 pressed against the back surface 17a of the lamp 11 and point-contacted thereto. The lamp 11 is held stationary by the frictional force with the portion 43. Further, as shown by a two-dot chain line in FIG. 4, the electric wire 26 is drawn out of the instrument body 31 by bypassing one arm 43 b of the pressing portion 43. The intermediate portion of the electric wire 26 is held by the pressing portion 43 via an electric wire holder (not shown) attached to the holder receiving portion 44 formed on the pressing portion 43, and these holding portion and the electric wire holder 27 The intermediate wire portion is shaped so as not to contact the arm 43b regardless of the movement of the lamp 11.

  The reading lamp 1 having the above configuration is accommodated in a protective case 57 indicated by a two-dot chain line in FIG. 5 and attached to the shoulder portion of the seat. The protective case 57 has a hole through which the output convex portion 13 passes. This hole is formed with a diameter that does not interfere with the tilt adjustment of the lamp 11. In the state of being attached to the seat, the front surface of the protective case 57 is covered with a cushion material and a front cover (not shown) of the seat, and the output convex portion 13 protrudes through the cushion material and the front cover. As a result, the direction of the lamp 11 can be adjusted, for example, by tilting the lamp 11 while holding the exit convex portion 13. Therefore, the adjustment operation is easier and accurate even with a slight movement compared to a configuration without the exit convex portion 13. it can. In this case, if the lamp 11 is pushed and operated so that the hemispherical outer surface 12a is separated from the opening 32a, the resistance to the movement of the lamp 11 is reduced, so that the direction of the lamp 11 can be adjusted more easily.

  In this way, adjustment to change the irradiation direction of the light from the lamp 11 is realized by applying an operation force that exceeds the frictional force to the lamp 11 and rotating the lamp 11. At that time, the hemispherical outer surface 12a of the lamp 11 slides on the edge of the opening 32a of the fixture body 31, and the back surface 17a of the lamp 11 slides on the central portion 43a of the leaf spring 41. Therefore, when the lamp 11 is adjusted to a desired direction, the lamp 11 can be stopped at the position at that time by releasing the hand from the emission convex portion 13. In addition, since the width of the gap G of the fixture body 31 is sufficiently larger than the protrusion 18a of the lamp 11, the protrusion 18a freely moves in the gap G in the adjustment, and when the protrusion 18a hits the arcuate wall 33, the lamp 11 The maximum tilt angle is regulated.

  It is conceivable that the lamp 11 is pushed with an excessive force during the adjustment operation described above. In addition, when a passenger passing through the passage accidentally pokes the reading lamp 1 by hand, the lamp 11 is pushed with an excessive force. In this case, the lamp 11 is pushed in by the maximum distance L, and the back convex portion 17 pushes the pressing portion 43 of the leaf spring 41 and elastically deforms the pressing portion 43 accordingly.

  However, when the push-in progresses to some extent, the arc-shaped portion 18 of the lamp 11 hits the stopper 51 attached to the fixture body 31. The stopper 51 is supported by a fixing portion 42 of a leaf spring 41 that is hooked by a plurality of spring mounting holes 35 and supported by the instrument body 31. Accordingly, the lamp 11 is received by the leaf spring 41 via the stopper 51, and further pushing of the lamp 11 is prevented. That is, the lamp 11 can be prevented from being pushed excessively beyond the separation distance L. As a result, all of the excessive pressing load does not act on the pressing portion 43 of the leaf spring 41 that urges the lamp 11 toward the opening 32 a of the instrument body 31. When the pushing of the lamp 11 is restricted by the stopper 51, the deformation of the pressing portion 43 of the leaf spring 41 is still within the elastic limit, so that the permanent deformation of the leaf spring 41 is prevented. And the lamp 11 is pushed back by the elastic return of the press part 43 of the leaf | plate spring 41 at the same time the said excessive pushing force lose | disappears. Accordingly, since the frictional force generated by the spring force of the leaf spring 41 is held at a predetermined value, the performance of holding the lamp 11 in the adjusted direction can be prevented from being lowered, and accordingly the irradiation direction of the lamp 11 can be reliably held. .

  Further, since the stopper 51 is a ring, when the lamp 11 is excessively pushed, regardless of the direction of the lamp 11, in other words, the direction in which the lamp 11 is excessively pushed is any direction. However, the pressed lamp 11 can be reliably received by the stopper 51 supported by the instrument body 31 via the leaf spring 41. The same applies to the case where the direction of the lamp 11 is adjusted while the lamp 11 is pushed in. In this case, the center of rotation of the lamp 11 whose direction is being changed due to the position restriction by the stopper 51. Since it is possible to limit the change of the position, the direction of the lamp 11 can be easily adjusted.

  In addition, a movement force along the circumferential direction may act on the stopper 51 along with the above-described reception or in adjusting the direction of the lamp 11, but the detent projection 52 is fitted in the gap G. Therefore, the ring-shaped stopper 51 is not rotated. Therefore, it is possible to prevent the electric wire 26 from being damaged by being in contact with the edge of the leaf spring 41. The anti-rotation configuration described above is preferable in that no anti-rotation component is required.

  Moreover, in order to attach the stopper 51 to the instrument main body 31, a plurality of fixing portions 42 of the leaf spring 41 attached to the instrument main body 31 are used, and a stopper is provided between these and the step portion 36 provided on the instrument main body 31. Since it is realized with 51 in between, it is preferable in that no special parts are required.

The perspective view which shows the lighting fixture of one Embodiment of this invention seeing from the back side. The perspective view which shows the lighting fixture of FIG. 1 seeing from the front side. The perspective view which decomposes | disassembles and shows the lighting fixture of FIG. The rear view which shows the lighting fixture of FIG. The side view which shows the lighting fixture of FIG. Sectional drawing which shows the lighting fixture of FIG. Sectional drawing which follows F7-F7 line | wire in FIG. The rear view which shows the lighting fixture of FIG. 1 in the state which removed the leaf | plate spring.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Reading lamp (lighting fixture), 11 ... Lamp, 12 ... Cover (front side part), 12a ... Hemispherical outer surface, 15 ... Lamp body (back side part), 17 ... Back convex part, 17a ... Back, 20 ... Light source, 20b ... LED, 31 ... Tool body, 32a ... Opening of tool body, 35 ... Spring mounting hole (member mounting portion), 36 ... Step portion, 41 ... Plate spring (pressing member), 42 ... Fixing portion, 43 ... Press part, 51 ... stopper

Claims (2)

A lamp with a built-in light source, wherein the front side portion of the lamp has a hemispherical outer surface, and the back side portion of the lamp has a back surface formed of a part of a spherical surface;
The lamp has a plurality of member mounting portions and an opening having a diameter smaller than the maximum diameter of the hemispheric outer surface, and the lamp is redirected so that the irradiation direction by the lamp can be changed by receiving the hemispheric outer surface at an edge of the opening. An instrument body to support it;
A pressing member made of an elastic material that has a plurality of fixing portions attached to the member attaching portion, and a pressing portion that is provided between the fixing portions and elastically contacts the back surface, and presses the lamp against the edge of the opening. With members;
A stopper that is fixedly provided on the instrument body and receives the lamp that is moved when the lamp is pushed and moved toward the pressing member;
The lighting fixture characterized by comprising.   The lighting fixture according to claim 1, wherein the stopper is formed by a ring attached to the inside of the fixture main body.

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